Simon Peyton Jones pushed to branch wip/T21608 at Glasgow Haskell Compiler / GHC Commits: e2ae9518 by Ziyang Liu at 2022-05-06T19:22:22-04:00 Allow `let` just before pure/return in ApplicativeDo The following is currently rejected: ```haskell -- F is an Applicative but not a Monad x :: F (Int, Int) x = do a <- pure 0 let b = 1 pure (a, b) ``` This has bitten me multiple times. This MR contains a simple fix: only allow a "let only" segment to be merged with the next (and not the previous) segment. As a result, when the last one or more statements before pure/return are `LetStmt`s, there will be one more segment containing only those `LetStmt`s. Note that if the `let` statement mentions a name bound previously, then the program is still rejected, for example ```haskell x = do a <- pure 0 let b = a + 1 pure (a, b) ``` or the example in #18559. To support this would require a more complex approach, but this is IME much less common than the previous case. - - - - - 0415449a by Matthew Pickering at 2022-05-06T19:22:58-04:00 template-haskell: Fix representation of OPAQUE pragmas There is a mis-match between the TH representation of OPAQUE pragmas and GHC's internal representation due to how OPAQUE pragmas disallow phase annotations. It seemed most in keeping to just fix the wired in name issue by adding a special case to the desugaring of INLINE pragmas rather than making TH/GHC agree with how the representation should look. Fixes #21463 - - - - - 4de887e2 by Simon Peyton Jones at 2022-05-06T19:23:34-04:00 Comments only: Note [AppCtxt] - - - - - 6e69964d by Matthew Pickering at 2022-05-06T19:24:10-04:00 Fix name of windows release bindist in doc-tarball job - - - - - ced4689e by Matthew Pickering at 2022-05-06T19:24:46-04:00 ci: Generate source-tarball in release jobs We need to distribute the source tarball so we should generate it in the CI pipeline. - - - - - 3c91de21 by Rob at 2022-05-08T13:40:53+02:00 Change Specialise to use OrdList. Fixes #21362 Metric Decrease: T16875 - - - - - 67072c31 by Simon Jakobi at 2022-05-08T12:23:43-04:00 Tweak GHC.CmmToAsm.CFG.delEdge mapAdjust is more efficient than mapAlter. - - - - - 374554bb by Teo Camarasu at 2022-05-09T16:24:37-04:00 Respect -po when heap profiling (#21446) - - - - - 1ea414b6 by Teo Camarasu at 2022-05-09T16:24:37-04:00 add test case for #21446 - - - - - c7902078 by Jens Petersen at 2022-05-09T16:25:17-04:00 avoid hadrian/bindist/Makefile install_docs error when --docs=none When docs are disabled the bindist does not have docs/ and hence docs-utils/ is not generated. Here we just test that docs-utils exists before attempting to install prologue.txt and gen_contents_index to avoid the error: /usr/bin/install: cannot stat 'docs-utils/prologue.txt': No such file or directory make: *** [Makefile:195: install_docs] Error 1 - - - - - 158bd659 by Hécate Moonlight at 2022-05-09T16:25:56-04:00 Correct base's changelog for 4.16.1.0 This commit reaffects the new Ix instances of the foreign integral types from base 4.17 to 4.16.1.0 closes #21529 - - - - - a4fbb589 by Sylvain Henry at 2022-05-09T16:26:36-04:00 STG: only print cost-center if asked to - - - - - 50347ded by Gergő Érdi at 2022-05-10T11:43:33+00:00 Improve "Glomming" note Add a paragraph that clarifies that `occurAnalysePgm` finding out-of-order references, and thus needing to glom, is not a cause for concern when its root cause is rewrite rules. - - - - - df2e3373 by Eric Lindblad at 2022-05-10T20:45:41-04:00 update INSTALL - - - - - dcac3833 by Matthew Pickering at 2022-05-10T20:46:16-04:00 driver: Make -no-keep-o-files -no-keep-hi-files work in --make mode It seems like it was just an oversight to use the incorrect DynFlags (global rather than local) when implementing these two options. Using the local flags allows users to request these intermediate files get cleaned up, which works fine in --make mode because 1. Interface files are stored in memory 2. Object files are only cleaned at the end of session (after link) Fixes #21349 - - - - - 35da81f8 by Ben Gamari at 2022-05-10T20:46:52-04:00 configure: Check for ffi.h As noted in #21485, we checked for ffi.h yet then failed to throw an error if it is missing. Fixes #21485. - - - - - bdc99cc2 by Simon Peyton Jones at 2022-05-10T20:47:28-04:00 Check for uninferrable variables in tcInferPatSynDecl This fixes #21479 See Note [Unquantified tyvars in a pattern synonym] While doing this, I found that some error messages pointed at the pattern synonym /name/, rather than the /declaration/ so I widened the SrcSpan to encompass the declaration. - - - - - 142a73d9 by Matthew Pickering at 2022-05-10T20:48:04-04:00 hadrian: Fix split-sections transformer The splitSections transformer has been broken since -dynamic-too support was implemented in hadrian. This is because we actually build the dynamic way when building the dynamic way, so the predicate would always fail. The fix is to just always pass `split-sections` even if it doesn't do anything for a particular way. Fixes #21138 - - - - - 699f5935 by Matthew Pickering at 2022-05-10T20:48:04-04:00 packaging: Build perf builds with -split-sections In 8f71d958 the make build system was made to use split-sections on linux systems but it appears this logic never made it to hadrian. There is the split_sections flavour transformer but this doesn't appear to be used for perf builds on linux. Closes #21135 - - - - - 21feece2 by Simon Peyton Jones at 2022-05-10T20:48:39-04:00 Use the wrapper for an unlifted binding We assumed the wrapper for an unlifted binding is the identity, but as #21516 showed, that is no always true. Solution is simple: use it. - - - - - 68d1ea5f by Matthew Pickering at 2022-05-10T20:49:15-04:00 docs: Fix path to GHC API docs in index.html In the make bindists we generate documentation in docs/ghc-<VER> but the hadrian bindists generate docs/ghc/ so the path to the GHC API docs was wrong in the index.html file. Rather than make the hadrian and make bindists the same it was easier to assume that if you're using the mkDocs script that you're using hadrian bindists. Fixes #21509 - - - - - 9d8f44a9 by Matthew Pickering at 2022-05-10T20:49:51-04:00 hadrian: Don't pass -j to haddock This has high potential for oversubcribing as many haddock jobs can be spawned in parralel which will each request the given number of capabilities. Once -jsem is implemented (#19416, !5176) we can expose that haddock via haddock and use that to pass a semaphore. Ticket #21136 - - - - - fec3e7aa by Matthew Pickering at 2022-05-10T20:50:27-04:00 hadrian: Only copy and install libffi headers when using in-tree libffi When passed `--use-system-libffi` then we shouldn't copy and install the headers from the system package. Instead the headers are expected to be available as a runtime dependency on the users system. Fixes #21485 #21487 - - - - - 5b791ed3 by mikael at 2022-05-11T08:22:13-04:00 FIND_LLVM_PROG: Recognize llvm suffix used by FreeBSD, ie llc10. - - - - - 8500206e by ARATA Mizuki at 2022-05-11T08:22:57-04:00 Make floating-point abs IEEE 754 compliant The old code used by via-C backend didn't handle the sign bit of NaN. See #21043. - - - - - 4a4c77ed by Alan Zimmerman at 2022-05-11T08:23:33-04:00 EPA: do statement with leading semicolon has wrong anchor The code do; a <- doAsync; b Generated an incorrect Anchor for the statement list that starts after the first semicolon. This commit fixes it. Closes #20256 - - - - - e3ca8dac by Simon Peyton Jones at 2022-05-11T08:24:08-04:00 Specialiser: saturate DFuns correctly Ticket #21489 showed that the saturation mechanism for DFuns (see Note Specialising DFuns) should use both UnspecType and UnspecArg. We weren't doing that; but this MR fixes that problem. No test case because it's hard to tickle, but it showed up in Gergo's work with GHC-as-a-library. - - - - - fcc7dc4c by Ben Gamari at 2022-05-11T20:05:41-04:00 gitlab-ci: Check for dynamic msys2 dependencies Both #20878 and #21196 were caused by unwanted dynamic dependencies being introduced by boot libraries. Ensure that we catch this in CI by attempting to run GHC in an environment with a minimal PATH. - - - - - 3c998f0d by Matthew Pickering at 2022-05-11T20:06:16-04:00 Add back Debian9 CI jobs We still build Deb9 bindists for now due to Ubuntu 18 and Linux Mint 19 not being at EOL until April 2023 and they still need tinfo5. Fixes #21469 - - - - - dea9a3d9 by Ben Gamari at 2022-05-11T20:06:51-04:00 rts: Drop setExecutable Since f6e366c058b136f0789a42222b8189510a3693d1 setExecutable has been dead code. Drop it. - - - - - 32cdf62d by Simon Peyton Jones at 2022-05-11T20:07:27-04:00 Add a missing guard in GHC.HsToCore.Utils.is_flat_prod_pat This missing guard gave rise to #21519. - - - - - 2c00a8d0 by Matthew Pickering at 2022-05-11T20:08:02-04:00 Add mention of -hi to RTS --help Fixes #21546 - - - - - a2dcad4e by Andre Marianiello at 2022-05-12T02:15:48+00:00 Decouple dynflags in Cmm parser (related to #17957) - - - - - 3a022baa by Andre Marianiello at 2022-05-12T02:15:48+00:00 Remove Module argument from initCmmParserConfig - - - - - 2fc8d76b by Andre Marianiello at 2022-05-12T02:15:48+00:00 Move CmmParserConfig and PDConfig into GHC.Cmm.Parser.Config - - - - - b8c5ffab by Andre Marianiello at 2022-05-12T18:13:55-04:00 Decouple dynflags in GHC.Core.Opt.Arity (related to #17957) Metric Decrease: T16875 - - - - - 3bf938b6 by sheaf at 2022-05-12T18:14:34-04:00 Update extending_ghc for TcPlugin changes The documentation still mentioned Derived constraints and an outdated datatype TcPluginResult. - - - - - 668a9ef4 by jackohughes at 2022-05-13T12:10:34-04:00 Fix printing of brackets in multiplicities (#20315) Change mulArrow to allow for printing of correct application precedence where necessary and update callers of mulArrow to reflect this. As part of this, move mulArrow from GHC/Utils/Outputtable to GHC/Iface/Type. Fixes #20315 - - - - - 30b8b7f1 by Ben Gamari at 2022-05-13T12:11:09-04:00 rts: Add debug output on ocResolve failure This makes it easier to see how resolution failures nest. - - - - - 53b3fa1c by Ben Gamari at 2022-05-13T12:11:09-04:00 rts/PEi386: Fix handling of weak symbols Previously we would flag the symbol as weak but failed to set its address, which must be computed from an "auxiliary" symbol entry the follows the weak symbol. Fixes #21556. - - - - - 5678f017 by Ben Gamari at 2022-05-13T12:11:09-04:00 testsuite: Add tests for #21556 - - - - - 49af0e52 by Ben Gamari at 2022-05-13T22:23:26-04:00 Re-export augment and build from GHC.List Resolves https://gitlab.haskell.org/ghc/ghc/-/issues/19127 - - - - - aed356e1 by Simon Peyton Jones at 2022-05-13T22:24:02-04:00 Comments only around HsWrapper - - - - - 27b90409 by Ben Gamari at 2022-05-16T08:30:44-04:00 hadrian: Introduce linting flavour transformer (+lint) The linting flavour enables -dlint uniformly across anything build by the stage1 compiler. -dcmm-lint is not currently enabled because it fails on i386 (see #21563) - - - - - 3f316776 by Matthew Pickering at 2022-05-16T08:30:44-04:00 hadrian: Uniformly enable -dlint with enableLinting transformer This fixes some bugs where * -dcore-lint was being passed when building stage1 libraries with the boot compiler * -dcore-lint was not being passed when building executables. Fixes #20135 - - - - - 3d74cfca by Andreas Klebinger at 2022-05-16T08:31:20-04:00 Make closure macros EXTERN_INLINE to make debugging easier Implements #21424. The RTS macros get_itbl and friends are extremely helpful during debugging. However only a select few of those were available in the compiled RTS as actual symbols as the rest were INLINE macros. This commit marks all of them as EXTERN_INLINE. This will still inline them at use sites but allow us to use their compiled counterparts during debugging. This allows us to use things like `p get_fun_itbl(ptr)` in the gdb shell since `get_fun_itbl` will now be available as symbol! - - - - - 93153aab by Matthew Pickering at 2022-05-16T08:31:55-04:00 packaging: Introduce CI job for generating hackage documentation This adds a CI job (hackage-doc-tarball) which generates the necessary tarballs for uploading libraries and documentation to hackage. The release script knows to download this folder and the upload script will also upload the release to hackage as part of the release. The `ghc_upload_libs` script is moved from ghc-utils into .gitlab/ghc_upload_libs There are two modes, preparation and upload. * The `prepare` mode takes a link to a bindist and creates a folder containing the source and doc tarballs ready to upload to hackage. * The `upload` mode takes the folder created by prepare and performs the upload to hackage. Fixes #21493 Related to #21512 - - - - - 65d31d05 by Simon Peyton Jones at 2022-05-16T15:32:50-04:00 Add arity to the INLINE pragmas for pattern synonyms The lack of INLNE arity was exposed by #21531. The fix is simple enough, if a bit clumsy. - - - - - 43c018aa by Krzysztof Gogolewski at 2022-05-16T15:33:25-04:00 Misc cleanup - Remove groupWithName (unused) - Use the RuntimeRepType synonym where possible - Replace getUniqueM + mkSysLocalOrCoVar with mkSysLocalOrCoVarM No functional changes. - - - - - 8dfea078 by Pavol Vargovcik at 2022-05-16T15:34:04-04:00 TcPlugin: access to irreducible givens + fix passed ev_binds_var - - - - - fb579e15 by Ben Gamari at 2022-05-17T00:25:02-04:00 driver: Introduce pgmcxx Here we introduce proper support for compilation of C++ objects. This includes: * logic in `configure` to detect the C++ toolchain and propagating this information into the `settings` file * logic in the driver to use the C++ toolchain when compiling C++ sources - - - - - 43628ed4 by Ben Gamari at 2022-05-17T00:25:02-04:00 testsuite: Build T20918 with HC, not CXX - - - - - 0ef249aa by Ben Gamari at 2022-05-17T00:25:02-04:00 Introduce package to capture dependency on C++ stdlib Here we introduce a new "virtual" package into the initial package database, `system-cxx-std-lib`. This gives users a convenient, platform agnostic way to link against C++ libraries, addressing #20010. Fixes #20010. - - - - - 03efe283 by Ben Gamari at 2022-05-17T00:25:02-04:00 testsuite: Add tests for system-cxx-std-lib package Test that we can successfully link against C++ code both in GHCi and batch compilation. See #20010 - - - - - 5f6527e0 by nineonine at 2022-05-17T00:25:38-04:00 OverloadedRecordFields: mention parent name in 'ambiguous occurrence' error for better disambiguation (#17420) - - - - - eccdb208 by Simon Peyton Jones at 2022-05-17T07:16:39-04:00 Adjust flags for pprTrace We were using defaultSDocContext for pprTrace, which suppresses lots of useful infomation. This small MR adds GHC.Utils.Outputable.traceSDocContext and uses it for pprTrace and pprTraceUserWarning. traceSDocContext is a global, and hence not influenced by flags, but that seems unavoidable. But I made the sdocPprDebug bit controlled by unsafeHasPprDebug, since we have the latter for exactly this purpose. Fixes #21569 - - - - - d2284c4c by Simon Peyton Jones at 2022-05-17T07:17:15-04:00 Fix bad interaction between withDict and the Specialiser This MR fixes a bad bug, where the withDict was inlined too vigorously, which in turn made the type-class Specialiser generate a bogus specialisation, because it saw the same overloaded function applied to two /different/ dictionaries. Solution: inline `withDict` later. See (WD8) of Note [withDict] in GHC.HsToCore.Expr See #21575, which is fixed by this change. - - - - - 70f52443 by Matthew Pickering at 2022-05-17T07:17:50-04:00 Bump time submodule to 1.12.2 This bumps the time submodule to the 1.12.2 release. Fixes #21571 - - - - - 2343457d by Vladislav Zavialov at 2022-05-17T07:18:26-04:00 Remove unused test files (#21582) Those files were moved to the perf/ subtree in 11c9a469, and then accidentally reintroduced in 680ef2c8. - - - - - cb52b4ae by Ben Gamari at 2022-05-17T16:00:14-04:00 CafAnal: Improve code clarity Here we implement a few measures to improve the clarity of the CAF analysis implementation. Specifically: * Use CafInfo instead of Bool since the former is more descriptive * Rename CAFLabel to CAFfyLabel, since not all CAFfyLabels are in fact CAFs * Add numerous comments - - - - - b048a9f4 by Ben Gamari at 2022-05-17T16:00:14-04:00 codeGen: Ensure that static datacon apps are included in SRTs When generating an SRT for a recursive group, GHC.Cmm.Info.Build.oneSRT filters out recursive references, as described in Note [recursive SRTs]. However, doing so for static functions would be unsound, for the reason described in Note [Invalid optimisation: shortcutting]. However, the same argument applies to static data constructor applications, as we discovered in #20959. Fix this by ensuring that static data constructor applications are included in recursive SRTs. The approach here is not entirely satisfactory, but it is a starting point. Fixes #20959. - - - - - 0e2d16eb by Matthew Pickering at 2022-05-17T16:00:50-04:00 Add test for #21558 This is now fixed on master and 9.2 branch. Closes #21558 - - - - - ef3c8d9e by Sylvain Henry at 2022-05-17T20:22:02-04:00 Don't store LlvmConfig into DynFlags LlvmConfig contains information read from llvm-passes and llvm-targets files in GHC's top directory. Reading these files is done only when needed (i.e. when the LLVM backend is used) and cached for the whole compiler session. This patch changes the way this is done: - Split LlvmConfig into LlvmConfig and LlvmConfigCache - Store LlvmConfigCache in HscEnv instead of DynFlags: there is no good reason to store it in DynFlags. As it is fixed per session, we store it in the session state instead (HscEnv). - Initializing LlvmConfigCache required some changes to driver functions such as newHscEnv. I've used the opportunity to untangle initHscEnv from initGhcMonad (in top-level GHC module) and to move it to GHC.Driver.Main, close to newHscEnv. - I've also made `cmmPipeline` independent of HscEnv in order to remove the call to newHscEnv in regalloc_unit_tests. - - - - - 828fbd8a by Andreas Klebinger at 2022-05-17T20:22:38-04:00 Give all EXTERN_INLINE closure macros prototypes - - - - - cfc8e2e2 by Ben Gamari at 2022-05-19T04:57:51-04:00 base: Introduce [sg]etFinalizerExceptionHandler This introduces a global hook which is called when an exception is thrown during finalization. - - - - - 372cf730 by Ben Gamari at 2022-05-19T04:57:51-04:00 base: Throw exceptions raised while closing finalized Handles Fixes #21336. - - - - - 3dd2f944 by Ben Gamari at 2022-05-19T04:57:51-04:00 testsuite: Add tests for #21336 - - - - - 297156e0 by Matthew Pickering at 2022-05-19T04:58:27-04:00 Add release flavour and use it for the release jobs The release flavour is essentially the same as the perf flavour currently but also enables `-haddock`. I have hopefully updated all the relevant places where the `-perf` flavour was hardcoded. Fixes #21486 - - - - - a05b6293 by Matthew Pickering at 2022-05-19T04:58:27-04:00 ci: Don't build sphinx documentation on centos The centos docker image lacks the sphinx builder so we disable building sphinx docs for these jobs. Fixes #21580 - - - - - 209d7c69 by Matthew Pickering at 2022-05-19T04:58:27-04:00 ci: Use correct syntax when args list is empty This seems to fail on the ancient version of bash present on CentOS - - - - - 02d16334 by Matthew Pickering at 2022-05-19T04:59:03-04:00 hadrian: Don't attempt to build dynamic profiling libraries We only support building static profiling libraries, the transformer was requesting things like a dynamic, threaded, debug, profiling RTS, which we have never produced nor distributed. Fixes #21567 - - - - - 35bdab1c by Ben Gamari at 2022-05-19T04:59:39-04:00 configure: Check CC_STAGE0 for --target support We previously only checked the stage 1/2 compiler for --target support. We got away with this for quite a while but it eventually caught up with us in #21579, where `bytestring`'s new NEON implementation was unbuildable on Darwin due to Rosetta's seemingly random logic for determining which executable image to execute. This lead to a confusing failure to build `bytestring`'s cbits, when `clang` tried to compile NEON builtins while targetting x86-64. Fix this by checking CC_STAGE0 for --target support. Fixes #21579. - - - - - 0ccca94b by Norman Ramsey at 2022-05-20T05:32:32-04:00 add dominator analysis of `CmmGraph` This commit adds module `GHC.Cmm.Dominators`, which provides a wrapper around two existing algorithms in GHC: the Lengauer-Tarjan dominator analysis from the X86 back end and the reverse postorder ordering from the Cmm Dataflow framework. Issue #20726 proposes that we evaluate some alternatives for dominator analysis, but for the time being, the best path forward is simply to use the existing analysis on `CmmGraph`s. This commit addresses a bullet in #21200. - - - - - 54f0b578 by Norman Ramsey at 2022-05-20T05:32:32-04:00 add dominator-tree function - - - - - 05ed917b by Norman Ramsey at 2022-05-20T05:32:32-04:00 add HasDebugCallStack; remove unneeded extensions - - - - - 0b848136 by Andreas Klebinger at 2022-05-20T05:32:32-04:00 document fields of `DominatorSet` - - - - - 8a26e8d6 by Ben Gamari at 2022-05-20T05:33:08-04:00 nonmoving: Fix documentation of GC statistics fields These were previously incorrect. Fixes #21553. - - - - - c1e24e61 by Matthew Pickering at 2022-05-20T05:33:44-04:00 Remove pprTrace from pushCoercionIntoLambda (#21555) This firstly caused spurious output to be emitted (as evidenced by #21555) but even worse caused a massive coercion to be attempted to be printed (> 200k terms) which would invariably eats up all the memory of your computer. The good news is that removing this trace allows the program to compile to completion, the bad news is that the program exhibits a core lint error (on 9.0.2) but not any other releases it seems. Fixes #21577 and #21555 - - - - - a36d12ee by Zubin Duggal at 2022-05-20T10:44:35-04:00 docs: Fix LlvmVersion in manpage (#21280) - - - - - 36b8a57c by Matthew Pickering at 2022-05-20T10:45:10-04:00 validate: Use $make rather than make In the validate script we are careful to use the $make variable as this stores whether we are using gmake, make, quiet mode etc. There was just this one place where we failed to use it. Fixes #21598 - - - - - 4aa3c5bd by Norman Ramsey at 2022-05-21T03:11:04+00:00 Change `Backend` type and remove direct dependencies With this change, `Backend` becomes an abstract type (there are no more exposed value constructors). Decisions that were formerly made by asking "is the current back end equal to (or different from) this named value constructor?" are now made by interrogating the back end about its properties, which are functions exported by `GHC.Driver.Backend`. There is a description of how to migrate code using `Backend` in the user guide. Clients using the GHC API can find a backdoor to access the Backend datatype in GHC.Driver.Backend.Internal. Bumps haddock submodule. Fixes #20927 - - - - - ecf5f363 by Julian Ospald at 2022-05-21T12:51:16-04:00 Respect DESTDIR in hadrian bindist Makefile, fixes #19646 - - - - - 7edd991e by Julian Ospald at 2022-05-21T12:51:16-04:00 Test DESTDIR in test_hadrian() - - - - - ea895b94 by Matthew Pickering at 2022-05-22T21:57:47-04:00 Consider the stage of typeable evidence when checking stage restriction We were considering all Typeable evidence to be "BuiltinInstance"s which meant the stage restriction was going unchecked. In-fact, typeable has evidence and so we need to apply the stage restriction. This is complicated by the fact we don't generate typeable evidence and the corresponding DFunIds until after typechecking is concluded so we introcue a new `InstanceWhat` constructor, BuiltinTypeableInstance which records whether the evidence is going to be local or not. Fixes #21547 - - - - - ffbe28e5 by Dominik Peteler at 2022-05-22T21:58:23-04:00 Modularize GHC.Core.Opt.LiberateCase Progress towards #17957 - - - - - bc723ac2 by Simon Peyton Jones at 2022-05-23T17:09:34+01:00 Improve FloatOut and SpecConstr This patch addresses a relatively obscure situation that arose when chasing perf regressions in !7847, which itself is fixing It does two things: * SpecConstr can specialise on ($df d1 d2) dictionary arguments * FloatOut no longer checks argument strictness See Note [Specialising on dictionaries] in GHC.Core.Opt.SpecConstr. A test case is difficult to construct, but it makes a big difference in nofib/real/eff/VSM, at least when we have the patch for #21286 installed. (The latter stops worker/wrapper for dictionary arguments). There is a spectacular, but slightly illusory, improvement in runtime perf on T15426. I have documented the specifics in T15426 itself. Metric Decrease: T15426 - - - - - 1a4195b0 by John Ericson at 2022-05-23T17:33:59-04:00 Make debug a `Bool` not an `Int` in `StgToCmmConfig` We don't need any more resolution than this. Rename the field to `stgToCmmEmitDebugInfo` to indicate it is no longer conveying any "level" information. - - - - - e9fff12b by Alan Zimmerman at 2022-05-23T21:04:49-04:00 EPA : Remove duplicate comments in DataFamInstD The code data instance Method PGMigration = MigrationQuery Query -- ^ Run a query against the database | MigrationCode (Connection -> IO (Either String ())) -- ^ Run any arbitrary IO code Resulted in two instances of the "-- ^ Run a query against the database" comment appearing in the Exact Print Annotations when it was parsed. Ensure only one is kept. Closes #20239 - - - - - e2520df3 by Alan Zimmerman at 2022-05-23T21:05:27-04:00 EPA: Comment Order Reversed Make sure comments captured in the exact print annotations are in order of increasing location Closes #20718 - - - - - 4b45fd72 by Teo Camarasu at 2022-05-24T10:49:13-04:00 Add test for T21455 - - - - - e2cd1d43 by Teo Camarasu at 2022-05-24T10:49:13-04:00 Allow passing -po outside profiling way Resolves #21455 - - - - - 3b8c413a by Greg Steuck at 2022-05-24T10:49:52-04:00 Fix haddock_*_perf tests on non-GNU-grep systems Using regexp pattern requires `egrep` and straight up `+`. The haddock_parser_perf and haddock_renamer_perf tests now pass on OpenBSD. They previously incorrectly parsed the files and awk complained about invalid syntax. - - - - - 1db877a3 by Ben Gamari at 2022-05-24T10:50:28-04:00 hadrian/bindist: Drop redundant include of install.mk `install.mk` is already included by `config.mk`. Moreover, `install.mk` depends upon `config.mk` to set `RelocatableBuild`, making this first include incorrect. - - - - - f485d267 by Greg Steuck at 2022-05-24T10:51:08-04:00 Remove -z wxneeded for OpenBSD With all the recent W^X fixes in the loader this workaround is not necessary any longer. I verified that the only tests failing for me on OpenBSD 7.1-current are the same (libc++ related) before and after this commit (with --fast). - - - - - 7c51177d by Andreas Klebinger at 2022-05-24T22:13:19-04:00 Use UnionListsOrd instead of UnionLists in most places. This should get rid of most, if not all "Overlong lists" errors and fix #20016 - - - - - 81b3741f by Andreas Klebinger at 2022-05-24T22:13:55-04:00 Fix #21563 by using Word64 for 64bit shift code. We use the 64bit shifts only on 64bit platforms. But we compile the code always so compiling it on 32bit caused a lint error. So use Word64 instead. - - - - - 2c25fff6 by Zubin Duggal at 2022-05-24T22:14:30-04:00 Fix compilation with -haddock on GHC <= 8.10 -haddock on GHC < 9.0 is quite fragile and can result in obtuse parse errors when it encounters invalid haddock syntax. This has started to affect users since 297156e0b8053a28a860e7a18e1816207a59547b enabled -haddock by default on many flavours. Furthermore, since we don't test bootstrapping with 8.10 on CI, this problem managed to slip throught the cracks. - - - - - cfb9faff by sheaf at 2022-05-24T22:15:12-04:00 Hadrian: don't add "lib" for relocatable builds The conditional in hadrian/bindist/Makefile depended on the target OS, but it makes more sense to use whether we are using a relocatable build. (Currently this only gets set to true on Windows, but this ensures that the logic stays correctly coupled.) - - - - - 9973c016 by Andre Marianiello at 2022-05-25T01:36:09-04:00 Remove HscEnv from GHC.HsToCore.Usage (related to #17957) Metric Decrease: T16875 - - - - - 2ff18e39 by sheaf at 2022-05-25T01:36:48-04:00 SimpleOpt: beta-reduce through casts The simple optimiser would sometimes fail to beta-reduce a lambda when there were casts in between the lambda and its arguments. This can cause problems because we rely on representation-polymorphic lambdas getting beta-reduced away (for example, those that arise from newtype constructors with representation-polymorphic arguments, with UnliftedNewtypes). - - - - - e74fc066 by CarrieMY at 2022-05-25T16:43:03+02:00 Desugar RecordUpd in `tcExpr` This patch typechecks record updates by desugaring them inside the typechecker using the HsExpansion mechanism, and then typechecking this desugared result. Example: data T p q = T1 { x :: Int, y :: Bool, z :: Char } | T2 { v :: Char } | T3 { x :: Int } | T4 { p :: Float, y :: Bool, x :: Int } | T5 The record update `e { x=e1, y=e2 }` desugars as follows e { x=e1, y=e2 } ===> let { x' = e1; y' = e2 } in case e of T1 _ _ z -> T1 x' y' z T4 p _ _ -> T4 p y' x' The desugared expression is put into an HsExpansion, and we typecheck that. The full details are given in Note [Record Updates] in GHC.Tc.Gen.Expr. Fixes #2595 #3632 #10808 #10856 #16501 #18311 #18802 #21158 #21289 Updates haddock submodule - - - - - 2b8bdab8 by Eric Lindblad at 2022-05-26T03:21:58-04:00 update README - - - - - 3d7e7e84 by BinderDavid at 2022-05-26T03:22:38-04:00 Replace dead link in Haddock documentation of Control.Monad.Fail (fixes #21602) - - - - - ee61c7f9 by John Ericson at 2022-05-26T03:23:13-04:00 Add Haddocks for `WwOpts` - - - - - da5ccf0e by Dominik Peteler at 2022-05-26T03:23:13-04:00 Avoid global compiler state for `GHC.Core.Opt.WorkWrap` Progress towards #17957 - - - - - 3bd975b4 by sheaf at 2022-05-26T03:23:52-04:00 Optimiser: avoid introducing bad rep-poly The functions `pushCoValArg` and `pushCoercionIntoLambda` could introduce bad representation-polymorphism. Example: type RR :: RuntimeRep type family RR where { RR = IntRep } type F :: TYPE RR type family F where { F = Int# } co = GRefl F (TYPE RR[0]) :: (F :: TYPE RR) ~# (F |> TYPE RR[0] :: TYPE IntRep) f :: F -> () `pushCoValArg` would transform the unproblematic application (f |> (co -> <()>)) (arg :: F |> TYPE RR[0]) into an application in which the argument does not have a fixed `RuntimeRep`: f ((arg |> sym co) :: (F :: TYPE RR)) - - - - - b22979fb by Fraser Tweedale at 2022-05-26T06:14:51-04:00 executablePath test: fix file extension treatment The executablePath test strips the file extension (if any) when comparing the query result with the expected value. This is to handle platforms where GHC adds a file extension to the output program file (e.g. .exe on Windows). After the initial check, the file gets deleted (if supported). However, it tries to delete the *stripped* filename, which is incorrect. The test currently passes only because Windows does not allow deleting the program while any process created from it is alive. Make the test program correct in general by deleting the *non-stripped* executable filename. - - - - - afde4276 by Fraser Tweedale at 2022-05-26T06:14:51-04:00 fix executablePath test for NetBSD executablePath support for NetBSD was added in a172be07e3dce758a2325104a3a37fc8b1d20c9c, but the test was not updated. Update the test so that it works for NetBSD. This requires handling some quirks: - The result of getExecutablePath could include "./" segments. Therefore use System.FilePath.equalFilePath to compare paths. - The sysctl(2) call returns the original executable name even after it was deleted. Add `canQueryAfterDelete :: [FilePath]` and adjust expectations for the post-delete query accordingly. Also add a note to the `executablePath` haddock to advise that NetBSD behaves differently from other OSes when the file has been deleted. Also accept a decrease in memory usage for T16875. On Windows, the metric is -2.2% of baseline, just outside the allowed ±2%. I don't see how this commit could have influenced this metric, so I suppose it's something in the CI environment. Metric Decrease: T16875 - - - - - d0e4355a by John Ericson at 2022-05-26T06:15:30-04:00 Factor out `initArityOps` to `GHC.Driver.Config.*` module We want `DynFlags` only mentioned in `GHC.Driver`. - - - - - 44bb7111 by romes at 2022-05-26T16:27:57+00:00 TTG: Move MatchGroup Origin field and MatchGroupTc to GHC.Hs - - - - - 88e58600 by sheaf at 2022-05-26T17:38:43-04:00 Add tests for eta-expansion of data constructors This patch adds several tests relating to the eta-expansion of data constructors, including UnliftedNewtypes and DataTypeContexts. - - - - - d87530bb by Richard Eisenberg at 2022-05-26T23:20:14-04:00 Generalize breakTyVarCycle to work with TyFamLHS The function breakTyVarCycle_maybe has been installed in a dark corner of GHC to catch some gremlins (a.k.a. occurs-check failures) who lurk there. But it previously only caught gremlins of the form (a ~ ... F a ...), where some of our intrepid users have spawned gremlins of the form (G a ~ ... F (G a) ...). This commit improves breakTyVarCycle_maybe (and renames it to breakTyEqCycle_maybe) to catch the new gremlins. Happily, the change is remarkably small. The gory details are in Note [Type equality cycles]. Test cases: typecheck/should_compile/{T21515,T21473}. - - - - - ed37027f by Hécate Moonlight at 2022-05-26T23:20:52-04:00 [base] Fix the links in the Data.Data module fix #21658 fix #21657 fix #21657 - - - - - 3bd7d5d6 by Krzysztof Gogolewski at 2022-05-27T16:44:48+02:00 Use a class to check validity of withDict This moves handling of the magic 'withDict' function from the desugarer to the typechecker. Details in Note [withDict]. I've extracted a part of T16646Fail to a separate file T16646Fail2, because the new error in 'reify' hides the errors from 'f' and 'g'. WithDict now works with casts, this fixes #21328. Part of #19915 - - - - - b54f6c4f by sheaf at 2022-05-28T21:00:09-04:00 Fix FreeVars computation for mdo Commit acb188e0 introduced a regression in the computation of free variables in mdo statements, as the logic in GHC.Rename.Expr.segmentRecStmts was slightly different depending on whether the recursive do block corresponded to an mdo statement or a rec statment. This patch restores the previous computation for mdo blocks. Fixes #21654 - - - - - 0704295c by Matthew Pickering at 2022-05-28T21:00:45-04:00 T16875: Stabilise (temporarily) by increasing acceptance threshold The theory is that on windows there is some difference in the environment between pipelines on master and merge requests which affects all tests equally but because T16875 barely allocates anything it is the test which is affected the most. See #21557 - - - - - 6341c8ed by Matthew Pickering at 2022-05-28T21:01:20-04:00 make: Fix make maintainer-clean deleting a file tracked by source control Fixes #21659 - - - - - fbf2f254 by Andrew Lelechenko at 2022-05-28T21:01:58-04:00 Expand documentation of hIsTerminalDevice - - - - - 0092c67c by Teo Camarasu at 2022-05-29T12:25:39+00:00 export IsList from GHC.IsList it is still re-exported from GHC.Exts - - - - - 91396327 by Sylvain Henry at 2022-05-30T09:40:55-04:00 MachO linker: fix handling of ARM64_RELOC_SUBTRACTOR ARM64_RELOC_SUBTRACTOR relocations are paired with an AMR64_RELOC_UNSIGNED relocation to implement: addend + sym1 - sym2 The linker was doing it in two steps, basically: *addend <- *addend - sym2 *addend <- *addend + sym1 The first operation was likely to overflow. For example when the relocation target was 32-bit and both sym1/sym2 were 64-bit addresses. With the small memory model, (sym1-sym2) would fit in 32 bits but (*addend-sym2) may not. Now the linker does it in one step: *addend <- *addend + sym1 - sym2 - - - - - acc26806 by Sylvain Henry at 2022-05-30T09:40:55-04:00 Some fixes to SRT documentation - reordered the 3 SRT implementation cases from the most general to the most specific one: USE_SRT_POINTER -> USE_SRT_OFFSET -> USE_INLINE_SRT_FIELD - added requirements for each - found and documented a confusion about "SRT inlining" not supported with MachO. (It is fixed in the following commit) - - - - - 5878f439 by Sylvain Henry at 2022-05-30T09:40:55-04:00 Enable USE_INLINE_SRT_FIELD on ARM64 It was previously disabled because of: - a confusion about "SRT inlining" (see removed comment in this commit) - a linker bug (overflow) in the handling of ARM64_RELOC_SUBTRACTOR relocation: fixed by a previous commit. - - - - - 59bd6159 by Matthew Pickering at 2022-05-30T09:41:39-04:00 ci: Make sure to exit promptly if `make install` fails. Due to the vageries of bash, you have to explicitly handle the failure and exit when in a function. This failed to exit promptly when !8247 was failing. See #21358 for the general issue - - - - - 5a5a28da by Sylvain Henry at 2022-05-30T09:42:23-04:00 Split GHC.HsToCore.Foreign.Decl This is preliminary work for JavaScript support. It's better to put the code handling the desugaring of Prim, C and JavaScript declarations into separate modules. - - - - - 6f5ff4fa by Sylvain Henry at 2022-05-30T09:43:05-04:00 Bump hadrian to LTS-19.8 (GHC 9.0.2) - - - - - f2e70707 by Sylvain Henry at 2022-05-30T09:43:05-04:00 Hadrian: remove unused code - - - - - 2f215b9f by Simon Peyton Jones at 2022-05-30T13:44:14-04:00 Eta reduction with casted function We want to be able to eta-reduce \x y. ((f x) |> co) y by pushing 'co' inwards. A very small change accommodates this See Note [Eta reduction with casted function] - - - - - f4f6a87a by Simon Peyton Jones at 2022-05-30T13:44:14-04:00 Do arity trimming at bindings, rather than in exprArity Sometimes there are very large casts, and coercionRKind can be slow. - - - - - 610a2b83 by Simon Peyton Jones at 2022-05-30T13:44:14-04:00 Make findRhsArity take RecFlag This avoids a fixpoint iteration for the common case of non-recursive bindings. - - - - - 80ba50c7 by Simon Peyton Jones at 2022-05-30T13:44:14-04:00 Comments and white space - - - - - 0079171b by Simon Peyton Jones at 2022-05-30T13:44:14-04:00 Make PrimOpId record levity This patch concerns #20155, part (1) The general idea is that since primops have curried bindings (currently in PrimOpWrappers.hs) we don't need to eta-expand them. But we /do/ need to eta-expand the levity-polymorphic ones, because they /don't/ have bindings. This patch makes a start in that direction, by identifying the levity-polymophic primops in the PrimOpId IdDetails constructor. For the moment, I'm still eta-expanding all primops (by saying that hasNoBinding returns True for all primops), because of the bug reported in #20155. But I hope that before long we can tidy that up too, and remove the TEMPORARILY stuff in hasNoBinding. - - - - - 6656f016 by Simon Peyton Jones at 2022-05-30T13:44:14-04:00 A bunch of changes related to eta reduction This is a large collection of changes all relating to eta reduction, originally triggered by #18993, but there followed a long saga. Specifics: * Move state-hack stuff from GHC.Types.Id (where it never belonged) to GHC.Core.Opt.Arity (which seems much more appropriate). * Add a crucial mkCast in the Cast case of GHC.Core.Opt.Arity.eta_expand; helps with T18223 * Add clarifying notes about eta-reducing to PAPs. See Note [Do not eta reduce PAPs] * I moved tryEtaReduce from GHC.Core.Utils to GHC.Core.Opt.Arity, where it properly belongs. See Note [Eta reduce PAPs] * In GHC.Core.Opt.Simplify.Utils.tryEtaExpandRhs, pull out the code for when eta-expansion is wanted, to make wantEtaExpansion, and all that same function in GHC.Core.Opt.Simplify.simplStableUnfolding. It was previously inconsistent, but it's doing the same thing. * I did a substantial refactor of ArityType; see Note [ArityType]. This allowed me to do away with the somewhat mysterious takeOneShots; more generally it allows arityType to describe the function, leaving its clients to decide how to use that information. I made ArityType abstract, so that clients have to use functions to access it. * Make GHC.Core.Opt.Simplify.Utils.rebuildLam (was stupidly called mkLam before) aware of the floats that the simplifier builds up, so that it can still do eta-reduction even if there are some floats. (Previously that would not happen.) That means passing the floats to rebuildLam, and an extra check when eta-reducting (etaFloatOk). * In GHC.Core.Opt.Simplify.Utils.tryEtaExpandRhs, make use of call-info in the idDemandInfo of the binder, as well as the CallArity info. The occurrence analyser did this but we were failing to take advantage here. In the end I moved the heavy lifting to GHC.Core.Opt.Arity.findRhsArity; see Note [Combining arityType with demand info], and functions idDemandOneShots and combineWithDemandOneShots. (These changes partly drove my refactoring of ArityType.) * In GHC.Core.Opt.Arity.findRhsArity * I'm now taking account of the demand on the binder to give extra one-shot info. E.g. if the fn is always called with two args, we can give better one-shot info on the binders than if we just look at the RHS. * Don't do any fixpointing in the non-recursive case -- simple short cut. * Trim arity inside the loop. See Note [Trim arity inside the loop] * Make SimpleOpt respect the eta-reduction flag (Some associated refactoring here.) * I made the CallCtxt which the Simplifier uses distinguish between recursive and non-recursive right-hand sides. data CallCtxt = ... | RhsCtxt RecFlag | ... It affects only one thing: - We call an RHS context interesting only if it is non-recursive see Note [RHS of lets] in GHC.Core.Unfold * Remove eta-reduction in GHC.CoreToStg.Prep, a welcome simplification. See Note [No eta reduction needed in rhsToBody] in GHC.CoreToStg.Prep. Other incidental changes * Fix a fairly long-standing outright bug in the ApplyToVal case of GHC.Core.Opt.Simplify.mkDupableContWithDmds. I was failing to take the tail of 'dmds' in the recursive call, which meant the demands were All Wrong. I have no idea why this has not caused problems before now. * Delete dead function GHC.Core.Opt.Simplify.Utils.contIsRhsOrArg Metrics: compile_time/bytes allocated Test Metric Baseline New value Change --------------------------------------------------------------------------------------- MultiLayerModulesTH_OneShot(normal) ghc/alloc 2,743,297,692 2,619,762,992 -4.5% GOOD T18223(normal) ghc/alloc 1,103,161,360 972,415,992 -11.9% GOOD T3064(normal) ghc/alloc 201,222,500 184,085,360 -8.5% GOOD T8095(normal) ghc/alloc 3,216,292,528 3,254,416,960 +1.2% T9630(normal) ghc/alloc 1,514,131,032 1,557,719,312 +2.9% BAD parsing001(normal) ghc/alloc 530,409,812 525,077,696 -1.0% geo. mean -0.1% Nofib: Program Size Allocs Runtime Elapsed TotalMem -------------------------------------------------------------------------------- banner +0.0% +0.4% -8.9% -8.7% 0.0% exact-reals +0.0% -7.4% -36.3% -37.4% 0.0% fannkuch-redux +0.0% -0.1% -1.0% -1.0% 0.0% fft2 -0.1% -0.2% -17.8% -19.2% 0.0% fluid +0.0% -1.3% -2.1% -2.1% 0.0% gg -0.0% +2.2% -0.2% -0.1% 0.0% spectral-norm +0.1% -0.2% 0.0% 0.0% 0.0% tak +0.0% -0.3% -9.8% -9.8% 0.0% x2n1 +0.0% -0.2% -3.2% -3.2% 0.0% -------------------------------------------------------------------------------- Min -3.5% -7.4% -58.7% -59.9% 0.0% Max +0.1% +2.2% +32.9% +32.9% 0.0% Geometric Mean -0.0% -0.1% -14.2% -14.8% -0.0% Metric Decrease: MultiLayerModulesTH_OneShot T18223 T3064 T15185 T14766 Metric Increase: T9630 - - - - - cac8c7bb by Matthew Pickering at 2022-05-30T13:44:50-04:00 hadrian: Fix building from source-dist without alex/happy This fixes two bugs which were adding dependencies on alex/happy when building from a source dist. * When we try to pass `--with-alex` and `--with-happy` to cabal when configuring but the builders are not set. This is fixed by making them optional. * When we configure, cabal requires alex/happy because of the build-tool-depends fields. These are now made optional with a cabal flag (build-tool-depends) for compiler/hpc-bin/genprimopcode. Fixes #21627 - - - - - a96dccfe by Matthew Pickering at 2022-05-30T13:44:50-04:00 ci: Test the bootstrap without ALEX/HAPPY on path - - - - - 0e5bb3a8 by Matthew Pickering at 2022-05-30T13:44:50-04:00 ci: Test bootstrapping in release jobs - - - - - d8901469 by Matthew Pickering at 2022-05-30T13:44:50-04:00 ci: Allow testing bootstrapping on MRs using the "test-bootstrap" label - - - - - 18326ad2 by Matthew Pickering at 2022-05-30T13:45:25-04:00 rts: Remove explicit timescale for deprecating -h flag We originally planned to remove the flag in 9.4 but there's actually no great rush to do so and it's probably less confusing (forever) to keep the message around suggesting an explicit profiling option. Fixes #21545 - - - - - eaaa1389 by Matthew Pickering at 2022-05-30T13:46:01-04:00 Enable -dlint in hadrian lint transformer Now #21563 is fixed we can properly enable `-dlint` in CI rather than a subset of the flags. - - - - - 0544f114 by Ben Gamari at 2022-05-30T19:16:55-04:00 upload-ghc-libs: Allow candidate-only upload - - - - - 83467435 by Sylvain Henry at 2022-05-30T19:17:35-04:00 Avoid using DynFlags in GHC.Linker.Unit (#17957) - - - - - 5c4421b1 by Matthew Pickering at 2022-05-31T08:35:17-04:00 hadrian: Introduce new package database for executables needed to build stage0 These executables (such as hsc2hs) are built using the boot compiler and crucially, most libraries from the global package database. We also move other build-time executables to be built in this stage such as linters which also cleans up which libraries end up in the global package database. This allows us to remove hacks where linters-common is removed from the package database when a bindist is created. This fixes issues caused by infinite recursion due to bytestring adding a dependency on template-haskell. Fixes #21634 - - - - - 0dafd3e7 by Matthew Pickering at 2022-05-31T08:35:17-04:00 Build stage1 with -V as well This helps tracing errors which happen when building stage1 - - - - - 15d42a7a by Matthew Pickering at 2022-05-31T08:35:52-04:00 Revert "packaging: Build perf builds with -split-sections" This reverts commit 699f593532a3cd5ca1c2fab6e6e4ce9d53be2c1f. Split sections causes segfaults in profiling way with old toolchains (deb9) and on windows (#21670) Fixes #21670 - - - - - d4c71f09 by John Ericson at 2022-05-31T16:26:28+00:00 Purge `DynFlags` and `HscEnv` from some `GHC.Core` modules where it's not too hard Progress towards #17957 Because of `CoreM`, I did not move the `DynFlags` and `HscEnv` to other modules as thoroughly as I usually do. This does mean that risk of `DynFlags` "creeping back in" is higher than it usually is. After we do the same process to the other Core passes, and then figure out what we want to do about `CoreM`, we can finish the job started here. That is a good deal more work, however, so it certainly makes sense to land this now. - - - - - a720322f by romes at 2022-06-01T07:44:44-04:00 Restore Note [Quasi-quote overview] - - - - - 392ce3fc by romes at 2022-06-01T07:44:44-04:00 Move UntypedSpliceFlavour from L.H.S to GHC.Hs UntypedSpliceFlavour was only used in the client-specific `GHC.Hs.Expr` but was defined in the client-independent L.H.S.Expr. - - - - - 7975202b by romes at 2022-06-01T07:44:44-04:00 TTG: Rework and improve splices This commit redefines the structure of Splices in the AST. We get rid of `HsSplice` which used to represent typed and untyped splices, quasi quotes, and the result of splicing either an expression, a type or a pattern. Instead we have `HsUntypedSplice` which models an untyped splice or a quasi quoter, which works in practice just like untyped splices. The `HsExpr` constructor `HsSpliceE` which used to be constructed with an `HsSplice` is split into `HsTypedSplice` and `HsUntypedSplice`. The former is directly constructed with an `HsExpr` and the latter now takes an `HsUntypedSplice`. Both `HsType` and `Pat` constructors `HsSpliceTy` and `SplicePat` now take an `HsUntypedSplice` instead of a `HsSplice` (remember only /untyped splices/ can be spliced as types or patterns). The result of splicing an expression, type, or pattern is now comfortably stored in the extension fields `XSpliceTy`, `XSplicePat`, `XUntypedSplice` as, respectively, `HsUntypedSpliceResult (HsType GhcRn)`, `HsUntypedSpliceResult (Pat GhcRn)`, and `HsUntypedSpliceResult (HsExpr GhcRn)` Overall the TTG extension points are now better used to make invalid states unrepresentable and model the progression between stages better. See Note [Lifecycle of an untyped splice, and PendingRnSplice] and Note [Lifecycle of an typed splice, and PendingTcSplice] for more details. Updates haddock submodule Fixes #21263 ------------------------- Metric Decrease: hard_hole_fits ------------------------- - - - - - 320270c2 by Matthew Pickering at 2022-06-01T07:44:44-04:00 Add test for #21619 Fixes #21619 - - - - - ef7ddd73 by Pierre Le Marre at 2022-06-01T07:44:47-04:00 Pure Haskell implementation of GHC.Unicode Switch to a pure Haskell implementation of base:GHC.Unicode, based on the implementation of the package unicode-data (https://github.com/composewell/unicode-data/). Approved by CLC as per https://github.com/haskell/core-libraries-committee/issues/59#issuecomment-1.... - Remove current Unicode cbits. - Add generator for Unicode property files from Unicode Character Database. - Generate internal modules. - Update GHC.Unicode. - Add unicode003 test for general categories and case mappings. - Add Python scripts to check 'base' Unicode tests outputs and characters properties. Fixes #21375 ------------------------- Metric Decrease: T16875 Metric Increase: T4029 T18304 haddock.base ------------------------- - - - - - 514a6a28 by Eric Lindblad at 2022-06-01T07:44:51-04:00 typos - - - - - 9004be3c by Matthew Pickering at 2022-06-01T07:44:52-04:00 source-dist: Copy in files created by ./boot Since we started producing source dists with hadrian we stopped copying in the files created by ./boot which adds a dependency on python3 and autoreconf. This adds back in the files which were created by running configure. Fixes #21673 #21672 and #21626 - - - - - a12a3cab by Matthew Pickering at 2022-06-01T07:44:52-04:00 ci: Don't try to run ./boot when testing bootstrap of source dist - - - - - e07f9059 by Shlomo Shuck at 2022-06-01T07:44:55-04:00 Language.Haskell.Syntax: Fix docs for PromotedConsT etc. Fixes ghc/ghc#21675. - - - - - 87295e6d by Ben Gamari at 2022-06-01T07:44:56-04:00 Bump bytestring, process, and text submodules Metric Decrease: T5631 Metric Increase: T18223 (cherry picked from commit 55fcee30cb3281a66f792e8673967d64619643af) - - - - - 24b5bb61 by Ben Gamari at 2022-06-01T07:44:56-04:00 Bump Cabal submodule To current `master`. (cherry picked from commit fbb59c212415188486aafd970eafef170516356a) - - - - - 5433a35e by Matthew Pickering at 2022-06-01T22:26:30-04:00 hadrian/tool-args: Write output to intermediate file rather than via stdout This allows us to see the output of hadrian while it is doing the setup. - - - - - 468f919b by Matthew Pickering at 2022-06-01T22:27:10-04:00 Make -fcompact-unwind the default This is a follow-up to !7247 (closed) making the inclusion of compact unwinding sections the default. Also a slight refactoring/simplification of the flag handling to add -fno-compact-unwind. - - - - - 819fdc61 by Zubin Duggal at 2022-06-01T22:27:47-04:00 hadrian bootstrap: add plans for 9.0.2 and 9.2.3 - - - - - 9fa790b4 by Zubin Duggal at 2022-06-01T22:27:47-04:00 ci: Add matrix for bootstrap sources - - - - - ce9f986b by John Ericson at 2022-06-02T15:42:59+00:00 HsToCore.Coverage: Improve haddocks - - - - - f065804e by John Ericson at 2022-06-02T15:42:59+00:00 Hoist auto `mkModBreaks` and `writeMixEntries` conditions to caller No need to inline traversing a maybe for `mkModBreaks`. And better to make each function do one thing and let the caller deside when than scatter the decision making and make the caller seem more imperative. - - - - - d550d907 by John Ericson at 2022-06-02T15:42:59+00:00 Rename `HsToCore.{Coverage -> Ticks}` The old name made it confusing why disabling HPC didn't disable the entire pass. The name makes it clear --- there are other reasons to add ticks in addition. - - - - - 6520da95 by John Ericson at 2022-06-02T15:42:59+00:00 Split out `GHC.HsToCore.{Breakpoints,Coverage}` and use `SizedSeq` As proposed in https://gitlab.haskell.org/ghc/ghc/-/merge_requests/7508#note_432877 and https://gitlab.haskell.org/ghc/ghc/-/merge_requests/7508#note_434676, `GHC.HsToCore.Ticks` is about ticks, breakpoints are separate and backend-specific (only for the bytecode interpreter), and mix entry writing is just for HPC. With this split we separate out those interpreter- and HPC-specific its, and keep the main `GHC.HsToCore.Ticks` agnostic. Also, instead of passing the reversed list and count around, we use `SizedSeq` which abstracts over the algorithm. This is much nicer to avoid noise and prevents bugs. (The bugs are not just hypothetical! I missed up the reverses on an earlier draft of this commit.) - - - - - 1838c3d8 by Sylvain Henry at 2022-06-02T15:43:14+00:00 GHC.HsToCore.Breakpoints: Slightly improve perf We have the length already, so we might as well use that rather than O(n) recomputing it. - - - - - 5a3fdcfd by John Ericson at 2022-06-02T15:43:59+00:00 HsToCore.Coverage: Purge DynFlags Finishes what !7467 (closed) started. Progress towards #17957 - - - - - 9ce9ea50 by HaskellMouse at 2022-06-06T09:50:00-04:00 Deprecate TypeInType extension This commit fixes #20312 It deprecates "TypeInType" extension according to the following proposal: https://github.com/ghc-proposals/ghc-proposals/blob/master/proposals/0083-no... It has been already implemented. The migration strategy: 1. Disable TypeInType 2. Enable both DataKinds and PolyKinds extensions Metric Decrease: T16875 - - - - - f2e037fd by Aaron Allen at 2022-06-06T09:50:39-04:00 Diagnostics conversions, part 6 (#20116) Replaces uses of `TcRnUnknownMessage` with proper diagnostics constructors in `GHC.Tc.Gen.Match`, `GHC.Tc.Gen.Pat`, and `GHC.Tc.Gen.Sig`. - - - - - 04209f2a by Simon Peyton Jones at 2022-06-06T09:51:15-04:00 Ensure floated dictionaries are in scope (again) In the Specialiser, we missed one more call to bringFloatedDictsIntoScope (see #21391). This omission led to #21689. The problem is that the call to `rewriteClassOps` needs to have in scope any dictionaries floated out of the arguments we have just specialised. Easy fix. - - - - - a7fece19 by John Ericson at 2022-06-07T05:04:22+00:00 Don't print the number of deps in count-deps tests It is redundant information and a source of needless version control conflicts when multiple MRs are changing the deps list. Just printing the list and not also its length is fine. - - - - - a1651a3a by John Ericson at 2022-06-07T05:06:38+00:00 Core.Lint: Reduce `DynFlags` and `HscEnv` Co-Authored-By: Andre Marianiello <andremarianiello@users.noreply.github.com> - - - - - 56ebf9a5 by Andreas Klebinger at 2022-06-09T09:11:43-04:00 Fix a CSE shadowing bug. We used to process the rhs of non-recursive bindings and their body using the same env. If we had something like let x = ... x ... this caused trouble because the two xs refer to different binders but we would substitute both for a new binder x2 causing out of scope errors. We now simply use two different envs for the rhs and body in cse_bind. It's all explained in the Note [Separate envs for let rhs and body] Fixes #21685 - - - - - 28880828 by sheaf at 2022-06-09T09:12:19-04:00 Typecheck remaining ValArgs in rebuildHsApps This patch refactors hasFixedRuntimeRep_remainingValArgs, renaming it to tcRemainingValArgs. The logic is moved to rebuildHsApps, which ensures consistent behaviour across tcApp and quickLookArg1/tcEValArg. This patch also refactors the treatment of stupid theta for data constructors, changing the place we drop stupid theta arguments from dsConLike to mkDataConRep (now the datacon wrapper drops these arguments). We decided not to implement PHASE 2 of the FixedRuntimeRep plan for these remaining ValArgs. Future directions are outlined on the wiki: https://gitlab.haskell.org/ghc/ghc/-/wikis/Remaining-ValArgs Fixes #21544 and #21650 - - - - - 1fbba97b by Matthew Pickering at 2022-06-09T09:12:54-04:00 Add test for T21682 Fixes #21682 - - - - - 8727be73 by Andreas Klebinger at 2022-06-09T09:13:29-04:00 Document dataToTag# primop - - - - - 7eab75bb by uhbif19 at 2022-06-09T20:22:47+03:00 Remove TcRnUnknownMessage usage from GHC.Rename.Env #20115 - - - - - 46d2fc65 by uhbif19 at 2022-06-09T20:24:40+03:00 Fix TcRnPragmaWarning meaning - - - - - 69e72ecd by Matthew Pickering at 2022-06-09T19:07:01-04:00 getProcessCPUTime: Fix the getrusage fallback to account for system CPU time clock_gettime reports the combined total or user AND system time so in order to replicate it with getrusage we need to add both system and user time together. See https://stackoverflow.com/questions/7622371/getrusage-vs-clock-gettime Some sample measurements when building Cabal with this patch t1: rusage t2: clock_gettime t1: 62347518000; t2: 62347520873 t1: 62395687000; t2: 62395690171 t1: 62432435000; t2: 62432437313 t1: 62478489000; t2: 62478492465 t1: 62514990000; t2: 62514992534 t1: 62515479000; t2: 62515480327 t1: 62515485000; t2: 62515486344 Fixes #21656 - - - - - 722814ba by Yiyun Liu at 2022-06-10T21:23:03-04:00 Use <br> instead of newline character - - - - - dc202080 by Matthew Craven at 2022-06-13T14:07:12-04:00 Use (fixed_lev = True) in mkDataTyConRhs - - - - - ad70c621 by Matthew Pickering at 2022-06-14T08:40:53-04:00 hadrian: Fix testing stage1 compiler There were various issues with testing the stage1 compiler.. 1. The wrapper was not being built 2. The wrapper was picking up the stage0 package database and trying to load prelude from that. 3. The wrappers never worked on windows so just don't support that for now. Fixes #21072 - - - - - ac83899d by Ben Gamari at 2022-06-14T08:41:30-04:00 validate: Ensure that $make variable is set Currently the `$make` variable is used without being set in `validate`'s Hadrian path, which uses make to install the binary distribution. Fix this. Fixes #21687. - - - - - 59bc6008 by John Ericson at 2022-06-15T18:05:35+00:00 CoreToStg.Prep: Get rid of `DynFlags` and `HscEnv` The call sites in `Driver.Main` are duplicative, but this is good, because the next step is to remove `InteractiveContext` from `Core.Lint` into `Core.Lint.Interactive`. Also further clean up `Core.Lint` to use a better configuration record than the one we initially added. - - - - - aa9d9381 by Ben Gamari at 2022-06-15T20:33:04-04:00 hadrian: Run xattr -rc . on bindist tarball Fixes #21506. - - - - - cdc75a1f by Ben Gamari at 2022-06-15T20:33:04-04:00 configure: Hide spurious warning from ld Previously the check_for_gold_t22266 configure check could result in spurious warnings coming from the linker being blurted to stderr. Suppress these by piping stderr to /dev/null. - - - - - e128b7b8 by Ben Gamari at 2022-06-15T20:33:40-04:00 cmm: Add surface syntax for MO_MulMayOflo - - - - - bde65ea9 by Ben Gamari at 2022-06-15T20:34:16-04:00 configure: Don't attempt to override linker on Darwin Configure's --enable-ld-override functionality is intended to ensure that we don't rely on ld.bfd, which tends to be slow and buggy, on Linux and Windows. However, on Darwin the lack of sensible package management makes it extremely easy for users to have awkward mixtures of toolchain components from, e.g., XCode, the Apple Command-Line Tools package, and homebrew. This leads to extremely confusing problems like #21712. Here we avoid this by simply giving up on linker selection on Darwin altogether. This isn't so bad since the Apple ld64 linker has decent performance and AFAICT fairly reliable. Closes #21712. - - - - - 25b510c3 by Torsten Schmits at 2022-06-16T12:37:45-04:00 replace quadratic nub to fight byte code gen perf explosion Despite this code having been present in the core-to-bytecode implementation, I have observed it in the wild starting with 9.2, causing enormous slowdown in certain situations. My test case produces the following profiles: Before: ``` total time = 559.77 secs (559766 ticks @ 1000 us, 1 processor) total alloc = 513,985,665,640 bytes (excludes profiling overheads) COST CENTRE MODULE SRC %time %alloc ticks bytes elem_by Data.OldList libraries/base/Data/OldList.hs:429:1-7 67.6 92.9 378282 477447404296 eqInt GHC.Classes libraries/ghc-prim/GHC/Classes.hs:275:8-14 12.4 0.0 69333 32 $c>>= GHC.Data.IOEnv <no location info> 6.9 0.6 38475 3020371232 ``` After: ``` total time = 89.83 secs (89833 ticks @ 1000 us, 1 processor) total alloc = 39,365,306,360 bytes (excludes profiling overheads) COST CENTRE MODULE SRC %time %alloc ticks bytes $c>>= GHC.Data.IOEnv <no location info> 43.6 7.7 39156 3020403424 doCase GHC.StgToByteCode compiler/GHC/StgToByteCode.hs:(805,1)-(1054,53) 2.5 7.4 2246 2920777088 ``` - - - - - aa7e1f20 by Matthew Pickering at 2022-06-16T12:38:21-04:00 hadrian: Don't install `include/` directory in bindist. The install_includes for the RTS package used to be put in the top-level ./include folder but this would lead to confusing things happening if you installed multiple GHC versions side-by-side. We don't need this folder anymore because install-includes is honoured properly by cabal and the relevant header files already copied in by the cabal installation process. If you want to depend on the header files for the RTS in a Haskell project then you just have to depend on the `rts` package and the correct include directories will be provided for you. If you want to depend on the header files in a standard C project then you should query ghc-pkg to get the right paths. ``` ghc-pkg field rts include-dirs --simple-output ``` Fixes #21609 - - - - - 03172116 by Bryan Richter at 2022-06-16T12:38:57-04:00 Enable eventlogs on nightly perf job - - - - - ecbf8685 by Hécate Moonlight at 2022-06-16T16:30:00-04:00 Repair dead link in TH haddocks Closes #21724 - - - - - 99ff3818 by sheaf at 2022-06-16T16:30:39-04:00 Hadrian: allow configuring Hsc2Hs This patch adds the ability to pass options to Hsc2Hs as Hadrian key/value settings, in the same way as cabal configure options, using the syntax: *.*.hsc2hs.run.opts += ... - - - - - 9c575f24 by sheaf at 2022-06-16T16:30:39-04:00 Hadrian bootstrap: look up hsc2hs Hadrian bootstrapping looks up where to find ghc_pkg, but the same logic was not in place for hsc2hs which meant we could fail to find the appropriate hsc2hs executabe when bootstrapping Hadrian. This patch adds that missing logic. - - - - - 229d741f by Ben Gamari at 2022-06-18T10:42:54-04:00 ghc-heap: Add (broken) test for #21622 - - - - - cadd7753 by Ben Gamari at 2022-06-18T10:42:54-04:00 ghc-heap: Don't Box NULL pointers Previously we could construct a `Box` of a NULL pointer from the `link` field of `StgWeak`. Now we take care to avoid ever introducing such pointers in `collect_pointers` and ensure that the `link` field is represented as a `Maybe` in the `Closure` type. Fixes #21622 - - - - - 31c214cc by Tamar Christina at 2022-06-18T10:43:34-04:00 winio: Add support to console handles to handleToHANDLE - - - - - 711cb417 by Ben Gamari at 2022-06-18T10:44:11-04:00 CmmToAsm/AArch64: Add SMUL[LH] instructions These will be needed to fix #21624. - - - - - d05d90d2 by Ben Gamari at 2022-06-18T10:44:11-04:00 CmmToAsm/AArch64: Fix syntax of OpRegShift operands Previously this produced invalid assembly containing a redundant comma. - - - - - a1e1d8ee by Ben Gamari at 2022-06-18T10:44:11-04:00 ncg/aarch64: Fix implementation of IntMulMayOflo The code generated for IntMulMayOflo was previously wrong as it depended upon the overflow flag, which the AArch64 MUL instruction does not set. Fix this. Fixes #21624. - - - - - 26745006 by Ben Gamari at 2022-06-18T10:44:11-04:00 testsuite: Add test for #21624 Ensuring that mulIntMayOflo# behaves as expected. - - - - - 94f2e92a by Sebastian Graf at 2022-06-20T09:40:58+02:00 CprAnal: Set signatures of DFuns to top The recursive DFun in the reproducer for #20836 also triggered a bug in CprAnal that is observable in a debug build. The CPR signature of a recursive DFunId was never updated and hence the optimistic arity 0 bottom signature triggered a mismatch with the arity 1 of the binding in WorkWrap. We never miscompiled any code because WW doesn't exploit bottom CPR signatures. - - - - - b570da84 by Sebastian Graf at 2022-06-20T09:43:29+02:00 CorePrep: Don't speculatively evaluate recursive calls (#20836) In #20836 we have optimised a terminating program into an endless loop, because we speculated the self-recursive call of a recursive DFun. Now we track the set of enclosing recursive binders in CorePrep to prevent speculation of such self-recursive calls. See the updates to Note [Speculative evaluation] for details. Fixes #20836. - - - - - 49fb2f9b by Sebastian Graf at 2022-06-20T09:43:32+02:00 Simplify: Take care with eta reduction in recursive RHSs (#21652) Similar to the fix to #20836 in CorePrep, we now track the set of enclosing recursive binders in the SimplEnv and SimpleOptEnv. See Note [Eta reduction in recursive RHSs] for details. I also updated Note [Arity robustness] with the insights Simon and I had in a call discussing the issue. Fixes #21652. Unfortunately, we get a 5% ghc/alloc regression in T16577. That is due to additional eta reduction in GHC.Read.choose1 and the resulting ANF-isation of a large list literal at the top-level that didn't happen before (presumably because it was too interesting to float to the top-level). There's not much we can do about that. Metric Increase: T16577 - - - - - 2563b95c by Sebastian Graf at 2022-06-20T09:45:09+02:00 Ignore .hie-bios - - - - - e4e44d8d by Simon Peyton Jones at 2022-06-20T12:31:45-04:00 Instantiate top level foralls in partial type signatures The main fix for #21667 is the new call to tcInstTypeBnders in tcHsPartialSigType. It was really a simple omission before. I also moved the decision about whether we need to apply the Monomorphism Restriction, from `decideGeneralisationPlan` to `tcPolyInfer`. That removes a flag from the InferGen constructor, which is good. But more importantly, it allows the new function, checkMonomorphismRestriction called from `tcPolyInfer`, to "see" the `Types` involved rather than the `HsTypes`. And that in turn matters because we invoke the MR for partial signatures if none of the partial signatures in the group have any overloading context; and we can't answer that question for HsTypes. See Note [Partial type signatures and the monomorphism restriction] in GHC.Tc.Gen.Bind. This latter is really a pre-existing bug. - - - - - 262a9f93 by Winston Hartnett at 2022-06-20T12:32:23-04:00 Make Outputable instance for InlineSig print the InlineSpec Fix ghc/ghc#21739 Squash fix ghc/ghc#21739 - - - - - b5590fff by Matthew Pickering at 2022-06-20T12:32:59-04:00 Add NO_BOOT to hackage_doc_tarball job We were attempting to boot a src-tarball which doesn't work as ./boot is not included in the source tarball. This slipped through as the job is only run on nightly. - - - - - d24afd9d by Vladislav Zavialov at 2022-06-20T17:34:44-04:00 HsToken for @-patterns and TypeApplications (#19623) One more step towards the new design of EPA. - - - - - 159b7628 by Tamar Christina at 2022-06-20T17:35:23-04:00 linker: only keep rtl exception tables if they have been relocated - - - - - da5ff105 by Andreas Klebinger at 2022-06-21T17:04:12+02:00 Ticky:Make json info a separate field. - - - - - 1a4ce4b2 by Matthew Pickering at 2022-06-22T09:49:22+01:00 Revert "Ticky:Make json info a separate field." This reverts commit da5ff10503e683e2148c62e36f8fe2f819328862. This was pushed directly without review. - - - - - f89bf85f by Vanessa McHale at 2022-06-22T08:21:32-04:00 Flags to disable local let-floating; -flocal-float-out, -flocal-float-out-top-level CLI flags These flags affect the behaviour of local let floating. If `-flocal-float-out` is disabled (the default) then we disable all local floating. ``` …(let x = let y = e in (a,b) in body)... ===> …(let y = e; x = (a,b) in body)... ``` Further to this, top-level local floating can be disabled on it's own by passing -fno-local-float-out-top-level. ``` x = let y = e in (a,b) ===> y = e; x = (a,b) ``` Note that this is only about local floating, ie, floating two adjacent lets past each other and doesn't say anything about the global floating pass which is controlled by `-fno-float`. Fixes #13663 - - - - - 4ccefc6e by Matthew Craven at 2022-06-22T08:22:12-04:00 Check for Int overflows in Data.Array.Byte - - - - - 2004e3c8 by Matthew Craven at 2022-06-22T08:22:12-04:00 Add a basic test for ByteArray's Monoid instance - - - - - fb36770c by Matthew Craven at 2022-06-22T08:22:12-04:00 Rename `copyByteArray` to `unsafeCopyByteArray` - - - - - ecc9aedc by Ben Gamari at 2022-06-22T08:22:48-04:00 testsuite: Add test for #21719 Happily, this has been fixed since 9.2. - - - - - 19606c42 by Brandon Chinn at 2022-06-22T08:23:28-04:00 Use lookupNameCache instead of lookupOrigIO - - - - - 4c9dfd69 by Brandon Chinn at 2022-06-22T08:23:28-04:00 Break out thNameToGhcNameIO (ref. #21730) - - - - - eb4fb849 by Michael Peyton Jones at 2022-06-22T08:24:07-04:00 Add laws for 'toInteger' and 'toRational' CLC discussion here: https://github.com/haskell/core-libraries-committee/issues/58 - - - - - c1a950c1 by Alexander Esgen at 2022-06-22T12:36:13+00:00 Correct documentation of defaults of the `-V` RTS option - - - - - b7b7d90d by Matthew Pickering at 2022-06-22T21:58:12-04:00 Transcribe discussion from #21483 into a Note In #21483 I had a discussion with Simon Marlow about the memory retention behaviour of -Fd. I have just transcribed that conversation here as it elucidates the potentially subtle assumptions which led to the design of the memory retention behaviours of -Fd. Fixes #21483 - - - - - 980d1954 by Ben Gamari at 2022-06-22T21:58:48-04:00 eventlog: Don't leave dangling pointers hanging around Previously we failed to reset pointers to various eventlog buffers to NULL after freeing them. In principle we shouldn't look at them after they are freed but nevertheless it is good practice to set them to a well-defined value. - - - - - 575ec846 by Eric Lindblad at 2022-06-22T21:59:28-04:00 runhaskell - - - - - e6a69337 by Artem Pelenitsyn at 2022-06-22T22:00:07-04:00 re-export GHC.Natural.minusNaturalMaybe from Numeric.Natural CLC proposal: https://github.com/haskell/core-libraries-committee/issues/45 - - - - - 5d45aa97 by Gergő Érdi at 2022-06-22T22:00:46-04:00 When specialising, look through floatable ticks. Fixes #21697. - - - - - 531205ac by Andreas Klebinger at 2022-06-22T22:01:22-04:00 TagCheck.hs: Properly check if arguments are boxed types. For one by mistake I had been checking against the kind of runtime rep instead of the boxity. This uncovered another bug, namely that we tried to generate the checking code before we had associated the function arguments with a register, so this could never have worked to begin with. This fixes #21729 and both of the above issues. - - - - - c7f9f6b5 by Gleb Popov at 2022-06-22T22:02:00-04:00 Use correct arch for the FreeBSD triple in gen-data-layout.sh Downstream bug for reference: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=261798 Relevant upstream issue: #15718 - - - - - 75f0091b by Andreas Klebinger at 2022-06-22T22:02:35-04:00 Bump nofib submodule. Allows the shake runner to build with 9.2.3 among other things. Fixes #21772 - - - - - 0aa0ce69 by Ben Gamari at 2022-06-27T08:01:03-04:00 Bump ghc-prim and base versions To 0.9.0 and 4.17.0 respectively. Bumps array, deepseq, directory, filepath, haskeline, hpc, parsec, stm, terminfo, text, unix, haddock, and hsc2hs submodules. (cherry picked from commit ba47b95122b7b336ce1cc00896a47b584ad24095) - - - - - 4713abc2 by Ben Gamari at 2022-06-27T08:01:03-04:00 testsuite: Use normalise_version more consistently Previously several tests' output were unnecessarily dependent on version numbers, particularly of `base`. Fix this. - - - - - d7b0642b by Matthew Pickering at 2022-06-27T08:01:03-04:00 linters: Fix lint-submodule-refs when crashing trying to find plausible branches - - - - - 38378be3 by Andreas Klebinger at 2022-06-27T08:01:39-04:00 hadrian: Improve haddocks for ghcDebugAssertions - - - - - ac7a7fc8 by Andreas Klebinger at 2022-06-27T08:01:39-04:00 Don't mark lambda binders as OtherCon We used to put OtherCon unfoldings on lambda binders of workers and sometimes also join points/specializations with with the assumption that since the wrapper would force these arguments once we execute the RHS they would indeed be in WHNF. This was wrong for reasons detailed in #21472. So now we purge evaluated unfoldings from *all* lambda binders. This fixes #21472, but at the cost of sometimes not using as efficient a calling convention. It can also change inlining behaviour as some occurances will no longer look like value arguments when they did before. As consequence we also change how we compute CBV information for arguments slightly. We now *always* determine the CBV convention for arguments during tidy. Earlier in the pipeline we merely mark functions as candidates for having their arguments treated as CBV. As before the process is described in the relevant notes: Note [CBV Function Ids] Note [Attaching CBV Marks to ids] Note [Never put `OtherCon` unfoldigns on lambda binders] ------------------------- Metric Decrease: T12425 T13035 T18223 T18223 T18923 MultiLayerModulesTH_OneShot Metric Increase: WWRec ------------------------- - - - - - 06cf6f4a by Tony Zorman at 2022-06-27T08:02:18-04:00 Add suggestions for unrecognised pragmas (#21589) In case of a misspelled pragma, offer possible corrections as to what the user could have meant. Fixes: https://gitlab.haskell.org/ghc/ghc/-/issues/21589 - - - - - 3fbab757 by Greg Steuck at 2022-06-27T08:02:56-04:00 Remove the traces of i386-*-openbsd, long live amd64 OpenBSD will not ship any ghc packages on i386 starting with 7.2 release. This means there will not be a bootstrap compiler easily available. The last available binaries are ghc-8.10.6 which is already not supported as bootstrap for HEAD. See here for more information: https://marc.info/?l=openbsd-ports&m=165060700222580&w=2 - - - - - 58530271 by Andrew Lelechenko at 2022-06-27T08:03:34-04:00 Add Foldable1 and Bifoldable1 type classes Approved by CLC in https://github.com/haskell/core-libraries-committee/issues/9 Instances roughly follow https://hackage.haskell.org/package/semigroupoids-5.3.7/docs/Data-Semigroup-... but the API of `Foldable1` was expanded in comparison to `semigroupoids`. Compatibility shim is available from https://github.com/phadej/foldable1 (to be released). Closes #13573. - - - - - a51f4ecc by Naomi Liu at 2022-06-27T08:04:13-04:00 add levity polymorphism to addrToAny# - - - - - f4edcdc4 by Naomi Liu at 2022-06-27T08:04:13-04:00 add tests for addrToAny# levity - - - - - 07016fc9 by Matthew Pickering at 2022-06-27T08:04:49-04:00 hadrian: Update main README page This README had some quite out-of-date content about the build system so I did a complete pass deleting old material. I also made the section about flavours more prominent and mentioned flavour transformers. - - - - - 79ae2d89 by Ben Gamari at 2022-06-27T08:05:24-04:00 testsuite: Hide output from test compilations with verbosity==2 Previously the output from test compilations used to determine whether, e.g., profiling libraries are available was shown with verbosity levels >= 2. However, the default level is 2, meaning that most users were often spammed with confusing errors. Fix this by bumping the verbosity threshold for this output to >=3. Fixes #21760. - - - - - 995ea44d by Ben Gamari at 2022-06-27T08:06:00-04:00 configure: Only probe for LD in FIND_LD Since 6be2c5a7e9187fc14d51e1ec32ca235143bb0d8b we would probe for LD rather early in `configure`. However, it turns out that this breaks `configure`'s `ld`-override logic, which assumes that `LD` was set by the user and aborts. Fixes #21778. - - - - - b43d140b by Sergei Trofimovich at 2022-06-27T08:06:39-04:00 `.hs-boot` make rules: add missing order-only dependency on target directory Noticed missing target directory dependency as a build failure in `make --shuffle` mode (added in https://savannah.gnu.org/bugs/index.php?62100): "cp" libraries/base/./GHC/Stack/CCS.hs-boot libraries/base/dist-install/build/GHC/Stack/CCS.hs-boot cp: cannot create regular file 'libraries/base/dist-install/build/GHC/Stack/CCS.hs-boot': No such file or directory libraries/haskeline/ghc.mk:4: libraries/haskeline/dist-install/build/.depend-v-p-dyn.haskell: No such file or directory make[1]: *** [libraries/base/ghc.mk:4: libraries/base/dist-install/build/GHC/Stack/CCS.hs-boot] Error 1 shuffle=1656129254 make: *** [Makefile:128: all] Error 2 shuffle=1656129254 Note that `cp` complains about inability to create target file. The change adds order-only dependency on a target directory (similar to the rest of rules in that file). The bug is lurking there since 2009 commit 34cc75e1a (`GHC new build system megapatch`.) where upfront directory creation was never added to `.hs-boot` files. - - - - - 57a5f88c by Ben Gamari at 2022-06-28T03:24:24-04:00 Mark AArch64/Darwin as requiring sign-extension Apple's AArch64 ABI requires that the caller sign-extend small integer arguments. Set platformCConvNeedsExtension to reflect this fact. Fixes #21773. - - - - - df762ae9 by Ben Gamari at 2022-06-28T03:24:24-04:00 -ddump-llvm shouldn't imply -fllvm Previously -ddump-llvm would change the backend used, which contrasts with all other dump flags. This is quite surprising and cost me quite a bit of time. Dump flags should not change compiler behavior. Fixes #21776. - - - - - 70f0c1f8 by Ben Gamari at 2022-06-28T03:24:24-04:00 CmmToAsm/AArch64: Re-format argument handling logic Previously there were very long, hard to parse lines. Fix this. - - - - - 696d64c3 by Ben Gamari at 2022-06-28T03:24:24-04:00 CmmToAsm/AArch64: Sign-extend narrow C arguments The AArch64/Darwin ABI requires that function arguments narrower than 32-bits must be sign-extended by the caller. We neglected to do this, resulting in #20735. Fixes #20735. - - - - - c006ac0d by Ben Gamari at 2022-06-28T03:24:24-04:00 testsuite: Add test for #20735 - - - - - 16b9100c by Ben Gamari at 2022-06-28T03:24:59-04:00 integer-gmp: Fix cabal file Evidently fields may not come after sections in a cabal file. - - - - - 03cc5d02 by Sergei Trofimovich at 2022-06-28T15:20:45-04:00 ghc.mk: fix 'make install' (`mk/system-cxx-std-lib-1.0.conf.install` does not exist) before the change `make install` was failing as: ``` "mv" "/<<NIX>>/ghc-9.3.20220406/lib/ghc-9.5.20220625/bin/ghc-stage2" "/<<NIX>>/ghc-9.3.20220406/lib/ghc-9.5.20220625/bin/ghc" make[1]: *** No rule to make target 'mk/system-cxx-std-lib-1.0.conf.install', needed by 'install_packages'. Stop. ``` I think it's a recent regression caused by 0ef249aa where `system-cxx-std-lib-1.0.conf` is created (somewhat manually), but not the .install varianlt of it. The fix is to consistently use `mk/system-cxx-std-lib-1.0.conf` everywhere. Closes: https://gitlab.haskell.org/ghc/ghc/-/issues/21784 - - - - - eecab8f9 by Simon Peyton Jones at 2022-06-28T15:21:21-04:00 Comments only, about join points This MR just adds some documentation about why casts destroy join points, following #21716. - - - - - 251471e7 by Matthew Pickering at 2022-06-28T19:02:41-04:00 Cleanup BuiltInSyntax vs UserSyntax There was some confusion about whether FUN/TYPE/One/Many should be BuiltInSyntax or UserSyntax. The answer is certainly UserSyntax as BuiltInSyntax is for things which are directly constructed by the parser rather than going through normal renaming channels. I fixed all the obviously wrong places I could find and added a test for the original bug which was caused by this (#21752) Fixes #21752 #20695 #18302 - - - - - 0e22f16c by Ben Gamari at 2022-06-28T19:03:16-04:00 template-haskell: Bump version to 2.19.0.0 Bumps text and exceptions submodules due to bounds. - - - - - bbe6f10e by Emily Bourke at 2022-06-29T08:23:13+00:00 Tiny tweak to `IOPort#` documentation The exclamation mark and bracket don’t seem to make sense here. I’ve looked through the history, and I don’t think they’re deliberate – possibly a copy-and-paste error. - - - - - 70e47489 by Dominik Peteler at 2022-06-29T19:26:31-04:00 Remove `CoreOccurAnal` constructor of the `CoreToDo` type It was dead code since the last occurence in an expression context got removed in 71916e1c018dded2e68d6769a2dbb8777da12664. - - - - - d0722170 by nineonine at 2022-07-01T08:15:56-04:00 Fix panic with UnliftedFFITypes+CApiFFI (#14624) When declaring foreign import using CAPI calling convention, using unlifted unboxed types would result in compiler panic. There was an attempt to fix the situation in #9274, however it only addressed some of the ByteArray cases. This patch fixes other missed cases for all prims that may be used as basic foreign types. - - - - - eb043148 by Douglas Wilson at 2022-07-01T08:16:32-04:00 rts: gc stats: account properly for copied bytes in sequential collections We were not updating the [copied,any_work,scav_find_work, max_n_todo_overflow] counters during sequential collections. As well, we were double counting for parallel collections. To fix this we add an `else` clause to the `if (is_par_gc())`. The par_* counters do not need to be updated in the sequential case because they must be 0. - - - - - f95edea9 by Matthew Pickering at 2022-07-01T19:21:55-04:00 desugar: Look through ticks when warning about possible literal overflow Enabling `-fhpc` or `-finfo-table-map` would case a tick to end up between the appliation of `neg` to its argument. This defeated the special logic which looks for `NegApp ... (HsOverLit` to warn about possible overflow if a user writes a negative literal (without out NegativeLiterals) in their code. Fixes #21701 - - - - - f25c8d03 by Matthew Pickering at 2022-07-01T19:22:31-04:00 ci: Fix definition of slow-validate flavour (so that -dlint) is passed In this embarassing sequence of events we were running slow-validate without -dlint. - - - - - bf7991b0 by Mike Pilgrem at 2022-07-02T10:12:04-04:00 Identify the extistence of the `runhaskell` command and that it is equivalent to the `runghc` command. Add an entry to the index for `runhaskell`. See https://gitlab.haskell.org/ghc/ghc/-/issues/21411 - - - - - 9e79f6d0 by Simon Jakobi at 2022-07-02T10:12:39-04:00 Data.Foldable1: Remove references to Foldable-specific note ...as discussed in https://gitlab.haskell.org/ghc/ghc/-/merge_requests/8495#note_439455. - - - - - 3a8970ac by romes at 2022-07-03T14:11:31-04:00 TTG: Move HsModule to L.H.S Move the definition of HsModule defined in GHC.Hs to Language.Haskell.Syntax with an added TTG parameter and corresponding extension fields. This is progress towards having the haskell-syntax package, as described in #21592 - - - - - f9f80995 by romes at 2022-07-03T14:11:31-04:00 TTG: Move ImpExp client-independent bits to L.H.S.ImpExp Move the GHC-independent definitions from GHC.Hs.ImpExp to Language.Haskell.Syntax.ImpExp with the required TTG extension fields such as to keep the AST independent from GHC. This is progress towards having the haskell-syntax package, as described in #21592 Bumps haddock submodule - - - - - c43dbac0 by romes at 2022-07-03T14:11:31-04:00 Refactor ModuleName to L.H.S.Module.Name ModuleName used to live in GHC.Unit.Module.Name. In this commit, the definition of ModuleName and its associated functions are moved to Language.Haskell.Syntax.Module.Name according to the current plan towards making the AST GHC-independent. The instances for ModuleName for Outputable, Uniquable and Binary were moved to the module in which the class is defined because these instances depend on GHC. The instance of Eq for ModuleName is slightly changed to no longer depend on unique explicitly and instead uses FastString's instance of Eq. - - - - - 2635c6f2 by konsumlamm at 2022-07-03T14:12:11-04:00 Expand `Ord` instance for `Down` Approved by CLC in https://github.com/haskell/core-libraries-committee/issues/23#issuecomment-1... - - - - - 36fba0df by Anselm Schüler at 2022-07-04T05:06:42+00:00 Add applyWhen to Data.Function per CLC prop Approved by CLC in https://github.com/haskell/core-libraries-committee/issues/71#issuecomment-1... - - - - - 3b13aab1 by Matthew Pickering at 2022-07-04T15:15:00-04:00 hadrian: Don't read package environments in ghc-stage1 wrapper The stage1 compiler may be on the brink of existence and not have even a working base library. You may have installed packages globally with a similar stage2 compiler which will then lead to arguments such as --show-iface not even working because you are passing too many package flags. The solution is simple, don't read these implicit files. Fixes #21803 - - - - - aba482ea by Andreas Klebinger at 2022-07-04T17:55:55-04:00 Ticky:Make json info a separate field. Fixes #21233 - - - - - 74f3867d by Matthew Pickering at 2022-07-04T17:56:30-04:00 Add docs:<pkg> command to hadrian to build docs for just one package - - - - - 418afaf1 by Matthew Pickering at 2022-07-04T17:56:30-04:00 upload-docs: propagate publish correctly in upload_sdist - - - - - ed793d7a by Matthew Pickering at 2022-07-04T17:56:30-04:00 docs-upload: Fix upload script when no packages are listed - - - - - d002c6e0 by Matthew Pickering at 2022-07-04T17:56:30-04:00 hadrian: Add --haddock-base-url option for specifying base-url when generating docs The motiviation for this flag is to be able to produce documentation which is suitable for uploading for hackage, ie, the cross-package links work correctly. There are basically three values you want to set this to: * off - default, base_url = ../%pkg% which works for local browsing * on - no argument , base_url = https:://hackage.haskell.org/package/%pkg%/docs - for hackage docs upload * on - argument, for example, base_url = http://localhost:8080/package/%pkg%/docs for testing the documentation. The `%pkg%` string is a template variable which is replaced with the package identifier for the relevant package. This is one step towards fixing #21749 - - - - - 41eb749a by Matthew Pickering at 2022-07-04T17:56:31-04:00 Add nightly job for generating docs suitable for hackage upload - - - - - 620ee7ed by Matthew Pickering at 2022-07-04T17:57:05-04:00 ghci: Support :set prompt in multi repl This adds supports for various :set commands apart from `:set <FLAG>` in multi repl, this includes `:set prompt` and so-on. Fixes #21796 - - - - - b151b65e by Matthew Pickering at 2022-07-05T16:32:31-04:00 Vendor filepath inside template-haskell Adding filepath as a dependency of template-haskell means that it can't be reinstalled if any build-plan depends on template-haskell. This is a temporary solution for the 9.4 release. A longer term solution is to split-up the template-haskell package into the wired-in part and a non-wired-in part which can be reinstalled. This was deemed quite risky on the 9.4 release timescale. Fixes #21738 - - - - - c9347ecf by John Ericson at 2022-07-05T16:33:07-04:00 Factor fields of `CoreDoSimplify` into separate data type This avoids some partiality. The work @mmhat is doing cleaning up and modularizing `Core.Opt` will build on this nicely. - - - - - d0e74992 by Eric Lindblad at 2022-07-06T01:35:48-04:00 https urls - - - - - 803e965c by Eric Lindblad at 2022-07-06T01:35:48-04:00 options and typos - - - - - 5519baa5 by Eric Lindblad at 2022-07-06T01:35:48-04:00 grammar - - - - - 4ddc1d3e by Eric Lindblad at 2022-07-06T01:35:48-04:00 sources - - - - - c95c2026 by Matthew Pickering at 2022-07-06T01:35:48-04:00 Fix lint warnings in bootstrap.py - - - - - 86ced2ad by romes at 2022-07-06T01:36:23-04:00 Restore Eq instance of ImportDeclQualifiedStyle Fixes #21819 - - - - - 3547e264 by romes at 2022-07-06T13:50:27-04:00 Prune L.H.S modules of GHC dependencies Move around datatypes, functions and instances that are GHC-specific out of the `Language.Haskell.Syntax.*` modules to reduce the GHC dependencies in them -- progressing towards #21592 Creates a module `Language.Haskell.Syntax.Basic` to hold basic definitions required by the other L.H.S modules (and don't belong in any of them) - - - - - e4eea07b by romes at 2022-07-06T13:50:27-04:00 TTG: Move CoreTickish out of LHS.Binds Remove the `[CoreTickish]` fields from datatype `HsBindLR idL idR` and move them to the extension point instance, according to the plan outlined in #21592 to separate the base AST from the GHC specific bits. - - - - - acc1816b by romes at 2022-07-06T13:50:27-04:00 TTG for ForeignImport/Export Add a TTG parameter to both `ForeignImport` and `ForeignExport` and, according to #21592, move the GHC-specific bits in them and in the other AST data types related to foreign imports and exports to the TTG extension point. - - - - - 371c5ecf by romes at 2022-07-06T13:50:27-04:00 TTG for HsTyLit Add TTG parameter to `HsTyLit` to move the GHC-specific `SourceText` fields to the extension point and out of the base AST. Progress towards #21592 - - - - - fd379d1b by romes at 2022-07-06T13:50:27-04:00 Remove many GHC dependencies from L.H.S Continue to prune the `Language.Haskell.Syntax.*` modules out of GHC imports according to the plan in the linked issue. Moves more GHC-specific declarations to `GHC.*` and brings more required GHC-independent declarations to `Language.Haskell.Syntax.*` (extending e.g. `Language.Haskell.Syntax.Basic`). Progress towards #21592 Bump haddock submodule for !8308 ------------------------- Metric Decrease: hard_hole_fits ------------------------- - - - - - c5415bc5 by Alan Zimmerman at 2022-07-06T13:50:27-04:00 Fix exact printing of the HsRule name Prior to this branch, the HsRule name was XRec pass (SourceText,RuleName) and there is an ExactPrint instance for (SourceText, RuleName). The SourceText has moved to a different location, so synthesise the original to trigger the correct instance when printing. We need both the SourceText and RuleName when exact printing, as it is possible to have a NoSourceText variant, in which case we fall back to the FastString. - - - - - 665fa5a7 by Matthew Pickering at 2022-07-06T13:51:03-04:00 driver: Fix issue with module loops and multiple home units We were attempting to rehydrate all dependencies of a particular module, but we actually only needed to rehydrate those of the current package (as those are the ones participating in the loop). This fixes loading GHC into a multi-unit session. Fixes #21814 - - - - - bbcaba6a by Andreas Klebinger at 2022-07-06T13:51:39-04:00 Remove a bogus #define from ClosureMacros.h - - - - - fa59223b by Tamar Christina at 2022-07-07T23:23:57-04:00 winio: make consoleReadNonBlocking not wait for any events at all. - - - - - 42c917df by Adam Sandberg Ericsson at 2022-07-07T23:24:34-04:00 rts: allow NULL to be used as an invalid StgStablePtr - - - - - 3739e565 by Andreas Schwab at 2022-07-07T23:25:10-04:00 RTS: Add stack marker to StgCRunAsm.S Every object file must be properly marked for non-executable stack, even if it contains no code. - - - - - a889bc05 by Ben Gamari at 2022-07-07T23:25:45-04:00 Bump unix submodule Adds `config.sub` to unix's `.gitignore`, fixing #19574. - - - - - 3609a478 by Matthew Pickering at 2022-07-09T11:11:58-04:00 ghci: Fix most calls to isLoaded to work in multi-mode The most egrarious thing this fixes is the report about the total number of loaded modules after starting a session. Ticket #20889 - - - - - fc183c90 by Matthew Pickering at 2022-07-09T11:11:58-04:00 Enable :edit command in ghci multi-mode. This works after the last change to isLoaded. Ticket #20888 - - - - - 46050534 by Simon Peyton Jones at 2022-07-09T11:12:34-04:00 Fix a scoping bug in the Specialiser In the call to `specLookupRule` in `already_covered`, in `specCalls`, we need an in-scope set that includes the free vars of the arguments. But we simply were not guaranteeing that: did not include the `rule_bndrs`. Easily fixed. I'm not sure how how this bug has lain for quite so long without biting us. Fixes #21828. - - - - - 6e8d9056 by Simon Peyton Jones at 2022-07-12T13:26:52+00:00 Edit Note [idArity varies independently of dmdTypeDepth] ...and refer to it in GHC.Core.Lint.lintLetBind. Fixes #21452 - - - - - 89ba4655 by Simon Peyton Jones at 2022-07-12T13:26:52+00:00 Tiny documentation wibbles (comments only) - - - - - 61a46c6d by Eric Lindblad at 2022-07-13T08:28:29-04:00 fix readme - - - - - 61babb5e by Eric Lindblad at 2022-07-13T08:28:29-04:00 fix bootstrap - - - - - 8b417ad5 by Eric Lindblad at 2022-07-13T08:28:29-04:00 tarball - - - - - e9d9f078 by Zubin Duggal at 2022-07-13T14:00:18-04:00 hie-files: Fix scopes for deriving clauses and instance signatures (#18425) - - - - - c4989131 by Zubin Duggal at 2022-07-13T14:00:18-04:00 hie-files: Record location of filled in default method bindings This is useful for hie files to reconstruct the evidence that default methods depend on. - - - - - 9c52e7fc by Zubin Duggal at 2022-07-13T14:00:18-04:00 testsuite: Factor out common parts from hiefile tests - - - - - 6a9e4493 by sheaf at 2022-07-13T14:00:56-04:00 Hadrian: update documentation of settings The documentation for key-value settings was a bit out of date. This patch updates it to account for `cabal.configure.opts` and `hsc2hs.run.opts`. The user-settings document was also re-arranged, to make the key-value settings more prominent (as it doesn't involve changing the Hadrian source code, and thus doesn't require any recompilation of Hadrian). - - - - - a2f142f8 by Zubin Duggal at 2022-07-13T20:43:32-04:00 Fix potential space leak that arise from ModuleGraphs retaining references to previous ModuleGraphs, in particular the lazy `mg_non_boot` field. This manifests in `extendMG`. Solution: Delete `mg_non_boot` as it is only used for `mgLookupModule`, which is only called in two places in the compiler, and should only be called at most once for every home unit: GHC.Driver.Make: mainModuleSrcPath :: Maybe String mainModuleSrcPath = do ms <- mgLookupModule mod_graph (mainModIs hue) ml_hs_file (ms_location ms) GHCI.UI: listModuleLine modl line = do graph <- GHC.getModuleGraph let this = GHC.mgLookupModule graph modl Instead `mgLookupModule` can be a linear function that looks through the entire list of `ModuleGraphNodes` Fixes #21816 - - - - - dcf8b30a by Ben Gamari at 2022-07-13T20:44:08-04:00 rts: Fix AdjustorPool bitmap manipulation Previously the implementation of bitmap_first_unset assumed that `__builtin_clz` would accept `uint8_t` however it apparently rather extends its argument to `unsigned int`. To fix this we simply revert to a naive implementation since handling the various corner cases with `clz` is quite tricky. This should be fine given that AdjustorPool isn't particularly hot. Ideally we would have a single, optimised bitmap implementation in the RTS but I'll leave this for future work. Fixes #21838. - - - - - ad8f3e15 by Luite Stegeman at 2022-07-16T07:20:36-04:00 Change GHCi bytecode return convention for unlifted datatypes. This changes the bytecode return convention for unlifted algebraic datatypes to be the same as for lifted types, i.e. ENTER/PUSH_ALTS instead of RETURN_UNLIFTED/PUSH_ALTS_UNLIFTED Fixes #20849 - - - - - 5434d1a3 by Colten Webb at 2022-07-16T07:21:15-04:00 Compute record-dot-syntax types Ensures type information for record-dot-syntax is included in HieASTs. See #21797 - - - - - 89d169ec by Colten Webb at 2022-07-16T07:21:15-04:00 Add record-dot-syntax test - - - - - 4beb9f3c by Ben Gamari at 2022-07-16T07:21:51-04:00 Document RuntimeRep polymorphism limitations of catch#, et al As noted in #21868, several primops accepting continuations producing RuntimeRep-polymorphic results aren't nearly as polymorphic as their types suggest. Document this limitation and adapt the `UnliftedWeakPtr` test to avoid breaking this limitation in `keepAlive#`. - - - - - 4ef1c65d by Ben Gamari at 2022-07-16T07:21:51-04:00 Make keepAlive# out-of-line This is a naive approach to fixing the unsoundness noticed in #21708. Specifically, we remove the lowering of `keepAlive#` via CorePrep and instead turn it into an out-of-line primop. This is simple, inefficient (since the continuation must now be heap allocated), but good enough for 9.4.1. We will revisit this (particiularly via #16098) in a future release. Metric Increase: T4978 T7257 T9203 - - - - - 1bbff35d by Greg Steuck at 2022-07-16T07:22:29-04:00 Suppress extra output from configure check for c++ libraries - - - - - 3acbd7ad by Ben Gamari at 2022-07-16T07:23:04-04:00 rel-notes: Drop mention of #21745 fix Since we have backported the fix to 9.4.1. - - - - - b27c2774 by Dominik Peteler at 2022-07-16T07:23:43-04:00 Align the behaviour of `dopt` and `log_dopt` Before the behaviour of `dopt` and `logHasDumpFlag` (and the underlying function `log_dopt`) were different as the latter did not take the verbosity level into account. This led to problems during the refactoring as we cannot simply replace calls to `dopt` with calls to `logHasDumpFlag`. In addition to that a subtle bug in the GHC module was fixed: `setSessionDynFlags` did not update the logger and as a consequence the verbosity value of the logger was not set appropriately. Fixes #21861 - - - - - 28347d71 by Douglas Wilson at 2022-07-16T13:25:06-04:00 rts: forkOn context switches the target capability Fixes #21824 - - - - - f1c44991 by Ben Gamari at 2022-07-16T13:25:41-04:00 cmm: Eliminate orphan Outputable instances Here we reorganize `GHC.Cmm` to eliminate the orphan `Outputable` and `OutputableP` instances for the Cmm AST. This makes it significantly easier to use the Cmm pretty-printers in tracing output without incurring module import cycles. - - - - - f2e5e763 by Ben Gamari at 2022-07-16T13:25:41-04:00 cmm: Move toBlockList to GHC.Cmm - - - - - fa092745 by Ben Gamari at 2022-07-16T13:25:41-04:00 compiler: Add haddock sections to GHC.Utils.Panic - - - - - 097759f9 by Ben Gamari at 2022-07-16T13:26:17-04:00 configure: Don't override Windows CXXFLAGS At some point we used the clang distribution from msys2's `MINGW64` environment for our Windows toolchain. This defaulted to using libgcc and libstdc++ for its runtime library. However, we found for a variety of reasons that compiler-rt, libunwind, and libc++ were more reliable, consequently we explicitly overrode the CXXFLAGS to use these. However, since then we have switched to use the `CLANG64` packaging, which default to these already. Consequently we can drop these arguments, silencing some redundant argument warnings from clang. Fixes #21669. - - - - - e38a2684 by Ben Gamari at 2022-07-16T23:50:36-04:00 rts/linker/Elf: Check that there are no NULL ctors - - - - - 616365b0 by Ben Gamari at 2022-07-16T23:50:36-04:00 rts/linker/Elf: Introduce support for invoking finalizers on unload Addresses #20494. - - - - - cdd3be20 by Ben Gamari at 2022-07-16T23:50:36-04:00 testsuite: Add T20494 - - - - - 03c69d8d by Ben Gamari at 2022-07-16T23:50:36-04:00 rts/linker/PEi386: Rename finit field to fini fini is short for "finalizer", which does not contain a "t". - - - - - 033580bc by Ben Gamari at 2022-07-16T23:50:36-04:00 rts/linker/PEi386: Refactor handling of oc->info Previously we would free oc->info after running initializers. However, we can't do this is we want to also run finalizers. Moreover, freeing oc->info so early was wrong for another reason: we will need it in order to unregister the exception tables (see the call to `RtlDeleteFunctionTable`). In service of #20494. - - - - - f17912e4 by Ben Gamari at 2022-07-16T23:50:36-04:00 rts/linker/PEi386: Add finalization support This implements #20494 for the PEi386 linker. Happily, this also appears to fix `T9405`, resolving #21361. - - - - - 2cd75550 by Ben Gamari at 2022-07-16T23:50:36-04:00 Loader: Implement gnu-style -l:$path syntax Gnu ld allows `-l` to be passed an absolute file path, signalled by a `:` prefix. Implement this in the GHC's loader search logic. - - - - - 5781a360 by Ben Gamari at 2022-07-16T23:50:36-04:00 Statically-link against libc++ on Windows Unfortunately on Windows we have no RPATH-like facility, making dynamic linking extremely fragile. Since we cannot assume that the user will add their GHC installation to `$PATH` (and therefore their DLL search path) we cannot assume that the loader will be able to locate our `libc++.dll`. To avoid this, we instead statically link against `libc++.a` on Windows. Fixes #21435. - - - - - 8e2e883b by Ben Gamari at 2022-07-16T23:50:36-04:00 rts/linker/PEi386: Ensure that all .ctors/.dtors sections are run It turns out that PE objects may have multiple `.ctors`/`.dtors` sections but the RTS linker had assumed that there was only one. Fix this. Fixes #21618. - - - - - fba04387 by Ben Gamari at 2022-07-16T23:50:36-04:00 rts/linker/PEi386: Respect dtor/ctor priority Previously we would run constructors and destructors in arbitrary order despite explicit priorities. Fixes #21847. - - - - - 1001952f by Ben Gamari at 2022-07-16T23:50:36-04:00 testsuite: Add test for #21618 and #21847 - - - - - 6f3816af by Ben Gamari at 2022-07-16T23:50:36-04:00 rts/linker/PEi386: Fix exception unwind unregistration RtlDeleteFunctionTable expects a pointer to the .pdata section yet we passed it the .xdata section. Happily, this fixes #21354. - - - - - d9bff44c by Ben Gamari at 2022-07-16T23:50:36-04:00 rts/linker/MachO: Drop dead code - - - - - d161e6bc by Ben Gamari at 2022-07-16T23:50:36-04:00 rts/linker/MachO: Use section flags to identify initializers - - - - - fbb17110 by Ben Gamari at 2022-07-16T23:50:36-04:00 rts/linker/MachO: Introduce finalizer support - - - - - 5b0ed8a8 by Ben Gamari at 2022-07-16T23:50:37-04:00 testsuite: Use system-cxx-std-lib instead of config.stdcxx_impl - - - - - 6c476e1a by Ben Gamari at 2022-07-16T23:50:37-04:00 rts/linker/Elf: Work around GCC 6 init/fini behavior It appears that GCC 6t (at least on i386) fails to give init_array/fini_array sections the correct SHT_INIT_ARRAY/SHT_FINI_ARRAY section types, instead marking them as SHT_PROGBITS. This caused T20494 to fail on Debian. - - - - - 5f8203b8 by Ben Gamari at 2022-07-16T23:50:37-04:00 testsuite: Mark T13366Cxx as unbroken on Darwin - - - - - 1fd2f851 by Ben Gamari at 2022-07-16T23:50:37-04:00 rts/linker: Fix resolution of __dso_handle on Darwin Darwin expects a leading underscore. - - - - - a2dc00f3 by Ben Gamari at 2022-07-16T23:50:37-04:00 rts/linker: Clean up section kinds - - - - - aeb1a7c3 by Ben Gamari at 2022-07-16T23:50:37-04:00 rts/linker: Ensure that __cxa_finalize is called on code unload - - - - - 028f081e by Ben Gamari at 2022-07-16T23:51:12-04:00 testsuite: Fix T11829 on Centos 7 It appears that Centos 7 has a more strict C++ compiler than most distributions since std::runtime_error is defined in <stdexcept> rather than <exception>. In T11829 we mistakenly imported the latter. - - - - - a10584e8 by Ben Gamari at 2022-07-17T22:30:32-04:00 hadrian: Rename documentation directories for consistency with make * Rename `docs` to `doc` * Place pdf documentation in `doc/` instead of `doc/pdfs/` Fixes #21164. - - - - - b27c5947 by Anselm Schüler at 2022-07-17T22:31:11-04:00 Fix incorrect proof of applyWhen’s properties - - - - - eb031a5b by Matthew Pickering at 2022-07-18T08:04:47-04:00 hadrian: Add multi:<pkg> and multi targets for starting a multi-repl This patch adds support to hadrian for starting a multi-repl containing all the packages which stage0 can build. In particular, there is the new user-facing command: ``` ./hadrian/ghci-multi ``` which when executed will start a multi-repl containing the `ghc` package and all it's dependencies. This is implemented by two new hadrian targets: ``` ./hadrian/build multi:<pkg> ``` Construct the arguments for a multi-repl session where the top-level package is <pkg>. For example, `./hadrian/ghci-multi` is implemented using `multi:ghc` target. There is also the `multi` command which constructs a repl for everything in stage0 which we can build. - - - - - 19e7cac9 by Eric Lindblad at 2022-07-18T08:05:27-04:00 changelog typo - - - - - af6731a4 by Eric Lindblad at 2022-07-18T08:05:27-04:00 typos - - - - - 415468fe by Simon Peyton Jones at 2022-07-18T16:36:54-04:00 Refactor SpecConstr to use treat bindings uniformly This patch, provoked by #21457, simplifies SpecConstr by treating top-level and nested bindings uniformly (see the new scBind). * Eliminates the mysterious scTopBindEnv * Refactors scBind to handle top-level and nested definitions uniformly. * But, for now at least, continues the status quo of not doing SpecConstr for top-level non-recursive bindings. (In contrast we do specialise nested non-recursive bindings, although the original paper did not; see Note [Local let bindings].) I tried the effect of specialising top-level non-recursive bindings (which is now dead easy to switch on, unlike before) but found some regressions, so I backed off. See !8135. It's a pure refactoring. I think it'll do a better job in a few cases, but there is no regression test. - - - - - d4d3fe6e by Andreas Klebinger at 2022-07-18T16:37:29-04:00 Rule matching: Don't compute the FVs if we don't look at them. - - - - - 5f907371 by Simon Peyton Jones at 2022-07-18T16:38:04-04:00 White space only in FamInstEnv - - - - - ae3b3b62 by Simon Peyton Jones at 2022-07-18T16:38:04-04:00 Make transferPolyIdInfo work for CPR I don't know why this hasn't bitten us before, but it was plain wrong. - - - - - 9bdfdd98 by Simon Peyton Jones at 2022-07-18T16:38:04-04:00 Inline mapAccumLM This function is called in inner loops in the compiler, and it's overloaded and higher order. Best just to inline it. This popped up when I was looking at something else. I think perhaps GHC is delicately balanced on the cusp of inlining this automatically. - - - - - d0b806ff by Simon Peyton Jones at 2022-07-18T16:38:04-04:00 Make SetLevels honour floatConsts This fix, in the definition of profitableFloat, is just for consistency. `floatConsts` should do what it says! I don't think it'll affect anything much, though. - - - - - d1c25a48 by Simon Peyton Jones at 2022-07-18T16:38:04-04:00 Refactor wantToUnboxArg a bit * Rename GHC.Core.Opt.WorkWrap.Utils.wantToUnboxArg to canUnboxArg and similarly wantToUnboxResult to canUnboxResult. * Add GHC.Core.Opt.DmdAnal.wantToUnboxArg as a wrapper for the (new) GHC.Core.Opt.WorkWrap.Utils.canUnboxArg, avoiding some yukky duplication. I decided it was clearer to give it a new data type for its return type, because I nedeed the FD_RecBox case which was not otherwise readiliy expressible. * Add dcpc_args to WorkWrap.Utils.DataConPatContext for the payload * Get rid of the Unlift constructor of UnboxingDecision, eliminate two panics, and two arguments to canUnboxArg (new name). Much nicer now. - - - - - 6d8a715e by Teo Camarasu at 2022-07-18T16:38:44-04:00 Allow running memInventory when the concurrent nonmoving gc is enabled If the nonmoving gc is enabled and we are using a threaded RTS, we now try to grab the collector mutex to avoid memInventory and the collection racing. Before memInventory was disabled. - - - - - aa75bbde by Ben Gamari at 2022-07-18T16:39:20-04:00 gitignore: don't ignore all aclocal.m4 files While GHC's own aclocal.m4 is generated by the aclocal tool, other packages' aclocal.m4 are committed in the repository. Previously `.gitignore` included an entry which covered *any* file named `aclocal.m4`, which lead to quite some confusion (e.g. see #21740). Fix this by modifying GHC's `.gitignore` to only cover GHC's own `aclocal.m4`. - - - - - 4b98c5ce by Boris Lykah at 2022-07-19T02:34:12-04:00 Add mapAccumM, forAccumM to Data.Traversable Approved by Core Libraries Committee in https://github.com/haskell/core-libraries-committee/issues/65#issuecomment-1... - - - - - bd92182c by Ben Gamari at 2022-07-19T02:34:47-04:00 configure: Use AC_PATH_TOOL to detect tools Previously we used AC_PATH_PROG which, as noted by #21601, does not look for tools with a target prefix, breaking cross-compilation. Fixes #21601. - - - - - e8c07aa9 by Matthew Pickering at 2022-07-19T10:07:53-04:00 driver: Fix implementation of -S We were failing to stop before running the assembler so the object file was also created. Fixes #21869 - - - - - e2f0094c by Ben Gamari at 2022-07-19T10:08:28-04:00 rts/ProfHeap: Ensure new Censuses are zeroed When growing the Census array ProfHeap previously neglected to zero the new part of the array. Consequently `freeEra` would attempt to free random words that often looked suspiciously like pointers. Fixes #21880. - - - - - 81d65f7f by sheaf at 2022-07-21T15:37:22+02:00 Make withDict opaque to the specialiser As pointed out in #21575, it is not sufficient to set withDict to inline after the typeclass specialiser, because we might inline withDict in one module and then import it in another, and we run into the same problem. This means we could still end up with incorrect runtime results because the typeclass specialiser would assume that distinct typeclass evidence terms at the same type are equal, when this is not necessarily the case when using withDict. Instead, this patch introduces a new magicId, 'nospec', which is only inlined in CorePrep. We make use of it in the definition of withDict to ensure that the typeclass specialiser does not common up distinct typeclass evidence terms. Fixes #21575 - - - - - 9a3e1f31 by Dominik Peteler at 2022-07-22T08:18:40-04:00 Refactored Simplify pass * Removed references to driver from GHC.Core.LateCC, GHC.Core.Simplify namespace and GHC.Core.Opt.Stats. Also removed services from configuration records. * Renamed GHC.Core.Opt.Simplify to GHC.Core.Opt.Simplify.Iteration. * Inlined `simplifyPgm` and renamed `simplifyPgmIO` to `simplifyPgm` and moved the Simplify driver to GHC.Core.Opt.Simplify. * Moved `SimplMode` and `FloatEnable` to GHC.Core.Opt.Simplify.Env. * Added a configuration record `TopEnvConfig` for the `SimplTopEnv` environment in GHC.Core.Opt.Simplify.Monad. * Added `SimplifyOpts` and `SimplifyExprOpts`. Provide initialization functions for those in a new module GHC.Driver.Config.Core.Opt.Simplify. Also added initialization functions for `SimplMode` to that module. * Moved `CoreToDo` and friends to a new module GHC.Core.Pipeline.Types and the counting types and functions (`SimplCount` and `Tick`) to new module GHC.Core.Opt.Stats. * Added getter functions for the fields of `SimplMode`. The pedantic bottoms option and the platform are retrieved from the ArityOpts and RuleOpts and the getter functions allow us to retrieve values from `SpecEnv` without the knowledge where the data is stored exactly. * Moved the coercion optimization options from the top environment to `SimplMode`. This way the values left in the top environment are those dealing with monadic functionality, namely logging, IO related stuff and counting. Added a note "The environments of the Simplify pass". * Removed `CoreToDo` from GHC.Core.Lint and GHC.CoreToStg.Prep and got rid of `CoreDoSimplify`. Pass `SimplifyOpts` in the `CoreToDo` type instead. * Prep work before removing `InteractiveContext` from `HscEnv`. - - - - - 2c5991cc by Simon Peyton Jones at 2022-07-22T08:18:41-04:00 Make the specialiser deal better with specialised methods This patch fixes #21848, by being more careful to update unfoldings in the type-class specialiser. See the new Note [Update unfolding after specialisation] Now that we are being so much more careful about unfoldings, it turned out that I could dispense with se_interesting, and all its tricky corners. Hooray. This fixes #21368. - - - - - ae166635 by Ben Gamari at 2022-07-22T08:18:41-04:00 ghc-boot: Clean up UTF-8 codecs In preparation for moving the UTF-8 codecs into `base`: * Move them to GHC.Utils.Encoding.UTF8 * Make names more consistent * Add some Haddocks - - - - - e8ac91db by Ben Gamari at 2022-07-22T08:18:41-04:00 base: Introduce GHC.Encoding.UTF8 Here we copy a subset of the UTF-8 implementation living in `ghc-boot` into `base`, with the intent of dropping the former in the future. For this reason, the `ghc-boot` copy is now CPP-guarded on `MIN_VERSION_base(4,18,0)`. Naturally, we can't copy *all* of the functions defined by `ghc-boot` as some depend upon `bytestring`; we rather just copy those which only depend upon `base` and `ghc-prim`. Further consolidation? ---------------------- Currently GHC ships with at least five UTF-8 implementations: * the implementation used by GHC in `ghc-boot:GHC.Utils.Encoding`; this can be used at a number of types including `Addr#`, `ByteArray#`, `ForeignPtr`, `Ptr`, `ShortByteString`, and `ByteString`. Most of this can be removed in GHC 9.6+2, when the copies in `base` will become available to `ghc-boot`. * the copy of the `ghc-boot` definition now exported by `base:GHC.Encoding.UTF8`. This can be used at `Addr#`, `Ptr`, `ByteArray#`, and `ForeignPtr` * the decoder used by `unpackCStringUtf8#` in `ghc-prim:GHC.CString`; this is specialised at `Addr#`. * the codec used by the IO subsystem in `base:GHC.IO.Encoding.UTF8`; this is specialised at `Addr#` but, unlike the above, supports recovery in the presence of partial codepoints (since in IO contexts codepoints may be broken across buffers) * the implementation provided by the `text` library This does seem a tad silly. On the other hand, these implementations *do* materially differ from one another (e.g. in the types they support, the detail in errors they can report, and the ability to recover from partial codepoints). Consequently, it's quite unclear that further consolidate would be worthwhile. - - - - - f9ad8025 by Ben Gamari at 2022-07-22T08:18:41-04:00 Add a Note summarising GHC's UTF-8 implementations GHC has a somewhat dizzying array of UTF-8 implementations. This note describes why this is the case. - - - - - 72dfad3d by Ben Gamari at 2022-07-22T08:18:42-04:00 upload_ghc_libs: Fix path to documentation The documentation was moved in a10584e8df9b346cecf700b23187044742ce0b35 but this one occurrence was note updated. Finally closes #21164. - - - - - a8b150e7 by sheaf at 2022-07-22T08:18:44-04:00 Add test for #21871 This adds a test for #21871, which was fixed by the No Skolem Info rework (MR !7105). Fixes #21871 - - - - - 6379f942 by sheaf at 2022-07-22T08:18:46-04:00 Add test for #21360 The way record updates are typechecked/desugared changed in MR !7981. Because we desugar in the typechecker to a simple case expression, the pattern match checker becomes able to spot the long-distance information and avoid emitting an incorrect pattern match warning. Fixes #21360 - - - - - ce0cd12c by sheaf at 2022-07-22T08:18:47-04:00 Hadrian: don't try to build "unix" on Windows - - - - - dc27e15a by Simon Peyton Jones at 2022-07-25T09:42:01-04:00 Implement DeepSubsumption This MR adds the language extension -XDeepSubsumption, implementing GHC proposal #511. This change mitigates the impact of GHC proposal The changes are highly localised, by design. See Note [Deep subsumption] in GHC.Tc.Utils.Unify. The main changes are: * Add -XDeepSubsumption, which is on by default in Haskell98 and Haskell2010, but off in Haskell2021. -XDeepSubsumption largely restores the behaviour before the "simple subsumption" change. -XDeepSubsumpition has a similar flavour as -XNoMonoLocalBinds: it makes type inference more complicated and less predictable, but it may be convenient in practice. * The main changes are in: * GHC.Tc.Utils.Unify.tcSubType, which does deep susumption and eta-expanansion * GHC.Tc.Utils.Unify.tcSkolemiseET, which does deep skolemisation * In GHC.Tc.Gen.App.tcApp we call tcSubTypeNC to match the result type. Without deep subsumption, unifyExpectedType would be sufficent. See Note [Deep subsumption] in GHC.Tc.Utils.Unify. * There are no changes to Quick Look at all. * The type of `withDict` becomes ambiguous; so add -XAllowAmbiguousTypes to GHC.Magic.Dict * I fixed a small but egregious bug in GHC.Core.FVs.varTypeTyCoFVs, where we'd forgotten to take the free vars of the multiplicity of an Id. * I also had to fix tcSplitNestedSigmaTys When I did the shallow-subsumption patch commit 2b792facab46f7cdd09d12e79499f4e0dcd4293f Date: Sun Feb 2 18:23:11 2020 +0000 Simple subsumption I changed tcSplitNestedSigmaTys to not look through function arrows any more. But that was actually an un-forced change. This function is used only in * Improving error messages in GHC.Tc.Gen.Head.addFunResCtxt * Validity checking for default methods: GHC.Tc.TyCl.checkValidClass * A couple of calls in the GHCi debugger: GHC.Runtime.Heap.Inspect All to do with validity checking and error messages. Acutally its fine to look under function arrows here, and quite useful a test DeepSubsumption05 (a test motivated by a build failure in the `lens` package) shows. The fix is easy. I added Note [tcSplitNestedSigmaTys]. - - - - - e31ead39 by Matthew Pickering at 2022-07-25T09:42:01-04:00 Add tests that -XHaskell98 and -XHaskell2010 enable DeepSubsumption - - - - - 67189985 by Matthew Pickering at 2022-07-25T09:42:01-04:00 Add DeepSubsumption08 - - - - - 5e93a952 by Simon Peyton Jones at 2022-07-25T09:42:01-04:00 Fix the interaction of operator sections and deep subsumption Fixes DeepSubsumption08 - - - - - 918620d9 by Zubin Duggal at 2022-07-25T09:42:01-04:00 Add DeepSubsumption09 - - - - - 2a773259 by Gabriella Gonzalez at 2022-07-25T09:42:40-04:00 Default implementation for mempty/(<>) Approved by: https://github.com/haskell/core-libraries-committee/issues/61 This adds a default implementation for `mempty` and `(<>)` along with a matching `MINIMAL` pragma so that `Semigroup` and `Monoid` instances can be defined in terms of `sconcat` / `mconcat`. The description for each class has also been updated to include the equivalent set of laws for the `sconcat`-only / `mconcat`-only instances. - - - - - 73836fc8 by Bryan Richter at 2022-07-25T09:43:16-04:00 ci: Disable (broken) perf-nofib See #21859 - - - - - c24ca5c3 by sheaf at 2022-07-25T09:43:58-04:00 Docs: clarify ConstraintKinds infelicity GHC doesn't consistently require the ConstraintKinds extension to be enabled, as it allows programs such as type families returning a constraint without this extension. MR !7784 fixes this infelicity, but breaking user programs was deemed to not be worth it, so we document it instead. Fixes #21061. - - - - - 5f2fbd5e by Simon Peyton Jones at 2022-07-25T09:44:34-04:00 More improvements to worker/wrapper This patch fixes #21888, and simplifies finaliseArgBoxities by eliminating the (recently introduced) data type FinalDecision. A delicate interaction meant that this patch commit d1c25a48154236861a413e058ea38d1b8320273f Date: Tue Jul 12 16:33:46 2022 +0100 Refactor wantToUnboxArg a bit make worker/wrapper go into an infinite loop. This patch fixes it by narrowing the handling of case (B) of Note [Boxity for bottoming functions], to deal only the arguemnts that are type variables. Only then do we drop the trimBoxity call, which is what caused the bug. I also * Added documentation of case (B), which was previously completely un-mentioned. And a regression test, T21888a, to test it. * Made unboxDeeplyDmd stop at lazy demands. It's rare anyway for a bottoming function to have a lazy argument (mainly when the data type is recursive and then we don't want to unbox deeply). Plus there is Note [No lazy, Unboxed demands in demand signature] * Refactored the Case equation for dmdAnal a bit, to do less redundant pattern matching. - - - - - b77d95f8 by Simon Peyton Jones at 2022-07-25T09:45:09-04:00 Fix a small buglet in tryEtaReduce Gergo points out (#21801) that GHC.Core.Opt.Arity.tryEtaReduce was making an ill-formed cast. It didn't matter, because the subsequent guard discarded it; but still worth fixing. Spurious warnings are distracting. - - - - - 3bbde957 by Zubin Duggal at 2022-07-25T09:45:45-04:00 Fix #21889, GHCi misbehaves with Ctrl-C on Windows On Windows, we create multiple levels of wrappers for GHCi which ultimately execute ghc --interactive. In order to handle console events properly, each of these wrappers must call FreeConsole() in order to hand off event processing to the child process. See #14150. In addition to this, FreeConsole must only be called from interactive processes (#13411). This commit makes two changes to fix this situation: 1. The hadrian wrappers generated using `hadrian/bindist/cwrappers/version-wrapper.c` call `FreeConsole` if the CPP flag INTERACTIVE_PROCESS is set, which is set when we are generating a wrapper for GHCi. 2. The GHCi wrapper in `driver/ghci/` calls the `ghc-$VER.exe` executable which is not wrapped rather than calling `ghc.exe` is is wrapped on windows (and usually non-interactive, so can't call `FreeConsole`: Before: ghci-$VER.exe calls ghci.exe which calls ghc.exe which calls ghc-$VER.exe After: ghci-$VER.exe calls ghci.exe which calls ghc-$VER.exe - - - - - 79f1b021 by Simon Jakobi at 2022-07-25T09:46:21-04:00 docs: Fix documentation of \cases Fixes #21902. - - - - - e4bf9592 by sternenseemann at 2022-07-25T09:47:01-04:00 ghc-cabal: allow Cabal 3.8 to unbreak make build When bootstrapping GHC 9.4.*, the build will fail when configuring ghc-cabal as part of the make based build system due to this upper bound, as Cabal has been updated to a 3.8 release. Reference #21914, see especially https://gitlab.haskell.org/ghc/ghc/-/issues/21914#note_444699 - - - - - 726d938e by Simon Peyton Jones at 2022-07-25T14:38:14-04:00 Fix isEvaldUnfolding and isValueUnfolding This fixes (1) in #21831. Easy, obviously correct. - - - - - 5d26c321 by Simon Peyton Jones at 2022-07-25T14:38:14-04:00 Switch off eta-expansion in rules and unfoldings I think this change will make little difference except to reduce clutter. But that's it -- if it causes problems we can switch it on again. - - - - - d4fe2f4e by Simon Peyton Jones at 2022-07-25T14:38:14-04:00 Teach SpecConstr about typeDeterminesValue This patch addresses #21831, point 2. See Note [generaliseDictPats] in SpecConstr I took the opportunity to refactor the construction of specialisation rules a bit, so that the rule name says what type we are specialising at. Surprisingly, there's a 20% decrease in compile time for test perf/compiler/T18223. I took a look at it, and the code size seems the same throughout. I did a quick ticky profile which seemed to show a bit less substitution going on. Hmm. Maybe it's the "don't do eta-expansion in stable unfoldings" patch, which is part of the same MR as this patch. Anyway, since it's a move in the right direction, I didn't think it was worth looking into further. Metric Decrease: T18223 - - - - - 65f7838a by Simon Peyton Jones at 2022-07-25T14:38:14-04:00 Add a 'notes' file in testsuite/tests/perf/compiler This file is just a place to accumlate notes about particular benchmarks, so that I don't keep re-inventing the wheel. - - - - - 61faff40 by Simon Peyton Jones at 2022-07-25T14:38:50-04:00 Get the in-scope set right in FamInstEnv.injectiveBranches There was an assert error, as Gergo pointed out in #21896. I fixed this by adding an InScopeSet argument to tcUnifyTyWithTFs. And also to GHC.Core.Unify.niFixTCvSubst. I also took the opportunity to get a couple more InScopeSets right, and to change some substTyUnchecked into substTy. This MR touches a lot of other files, but only because I also took the opportunity to introduce mkInScopeSetList, and use it. - - - - - 4a7256a7 by Cheng Shao at 2022-07-25T20:41:55+00:00 Add location to cc phase - - - - - 96811ba4 by Cheng Shao at 2022-07-25T20:41:55+00:00 Avoid as pipeline when compiling c - - - - - 2869b66d by Cheng Shao at 2022-07-25T20:42:20+00:00 testsuite: Skip test cases involving -S when testing unregisterised GHC We no longer generate .s files anyway. Metric Decrease: MultiLayerModules T10421 T13035 T13701 T14697 T16875 T18140 T18304 T18923 T9198 - - - - - 82a0991a by Ben Gamari at 2022-07-25T23:32:05-04:00 testsuite: introduce nonmoving_thread_sanity way (cherry picked from commit 19f8fce3659de3d72046bea9c61d1a82904bc4ae) - - - - - 4b087973 by Ben Gamari at 2022-07-25T23:32:06-04:00 rts/nonmoving: Track segment state It can often be useful during debugging to be able to determine the state of a nonmoving segment. Introduce some state, enabled by DEBUG, to track this. (cherry picked from commit 40e797ef591ae3122ccc98ab0cc3cfcf9d17bd7f) - - - - - 54a5c32d by Ben Gamari at 2022-07-25T23:32:06-04:00 rts/nonmoving: Don't scavenge objects which weren't evacuated This fixes a rather subtle bug in the logic responsible for scavenging objects evacuated to the non-moving generation. In particular, objects can be allocated into the non-moving generation by two ways: a. evacuation out of from-space by the garbage collector b. direct allocation by the mutator Like all evacuation, objects moved by (a) must be scavenged, since they may contain references to other objects located in from-space. To accomplish this we have the following scheme: * each nonmoving segment's block descriptor has a scan pointer which points to the first object which has yet to be scavenged * the GC tracks a set of "todo" segments which have pending scavenging work * to scavenge a segment, we scavenge each of the unmarked blocks between the scan pointer and segment's `next_free` pointer. We skip marked blocks since we know the allocator wouldn't have allocated into marked blocks (since they contain presumably live data). We can stop at `next_free` since, by definition, the GC could not have evacuated any objects to blocks above `next_free` (otherwise `next_free wouldn't be the first free block). However, this neglected to consider objects allocated by path (b). In short, the problem is that objects directly allocated by the mutator may become unreachable (but not swept, since the containing segment is not yet full), at which point they may contain references to swept objects. Specifically, we observed this in #21885 in the following way: 1. the mutator (specifically in #21885, a `lockCAF`) allocates an object (specifically a blackhole, which here we will call `blkh`; see Note [Static objects under the nonmoving collector] for the reason why) on the non-moving heap. The bitmap of the allocated block remains 0 (since allocation doesn't affect the bitmap) and the containing segment's (which we will call `blkh_seg`) `next_free` is advanced. 2. We enter the blackhole, evaluating the blackhole to produce a result (specificaly a cons cell) in the nursery 3. The blackhole gets updated into an indirection pointing to the cons cell; it is pushed to the generational remembered set 4. we perform a GC, the cons cell is evacuated into the nonmoving heap (into segment `cons_seg`) 5. the cons cell is marked 6. the GC concludes 7. the CAF and blackhole become unreachable 8. `cons_seg` is filled 9. we start another GC; the cons cell is swept 10. we start a new GC 11. something is evacuated into `blkh_seg`, adding it to the "todo" list 12. we attempt to scavenge `blkh_seg` (namely, all unmarked blocks between `scan` and `next_free`, which includes `blkh`). We attempt to evacuate `blkh`'s indirectee, which is the previously-swept cons cell. This is unsafe, since the indirectee is no longer a valid heap object. The problem here was that the scavenging logic *assumed* that (a) was the only source of allocations into the non-moving heap and therefore *all* unmarked blocks between `scan` and `next_free` were evacuated. However, due to (b) this is not true. The solution is to ensure that that the scanned region only encompasses the region of objects allocated during evacuation. We do this by updating `scan` as we push the segment to the todo-segment list to point to the block which was evacuated into. Doing this required changing the nonmoving scavenging implementation's update of the `scan` pointer to bump it *once*, instead of after scavenging each block as was done previously. This is because we may end up evacuating into the segment being scavenged as we scavenge it. This was quite tricky to discover but the result is quite simple, demonstrating yet again that global mutable state should be used exceedingly sparingly. Fixes #21885 (cherry picked from commit 0b27ea23efcb08639309293faf13fdfef03f1060) - - - - - 25c24535 by Ben Gamari at 2022-07-25T23:32:06-04:00 testsuite: Skip a few tests as in the nonmoving collector Residency monitoring under the non-moving collector is quite conservative (e.g. the reported value is larger than reality) since otherwise we would need to block on concurrent collection. Skip a few tests that are sensitive to residency. (cherry picked from commit 6880e4fbf728c04e8ce83e725bfc028fcb18cd70) - - - - - 42147534 by sternenseemann at 2022-07-26T16:26:53-04:00 hadrian: add flag disabling selftest rules which require QuickCheck The hadrian executable depends on QuickCheck for building, meaning this library (and its dependencies) will need to be built for bootstrapping GHC in the future. Building QuickCheck, however, can require TemplateHaskell. When building a statically linking GHC toolchain, TemplateHaskell can be tricky to get to work, and cross-compiling TemplateHaskell doesn't work at all without -fexternal-interpreter, so QuickCheck introduces an element of fragility to GHC's bootstrap. Since the selftest rules are the only part of hadrian that need QuickCheck, we can easily eliminate this bootstrap dependency when required by introducing a `selftest` flag guarding the rules' inclusion. Closes #8699. - - - - - 9ea29d47 by Simon Peyton Jones at 2022-07-26T16:27:28-04:00 Regression test for #21848 - - - - - ef30e215 by Matthew Pickering at 2022-07-28T13:56:59-04:00 driver: Don't create LinkNodes when -no-link is enabled Fixes #21866 - - - - - fc23b5ed by sheaf at 2022-07-28T13:57:38-04:00 Docs: fix mistaken claim about kind signatures This patch fixes #21806 by rectifying an incorrect claim about the usage of kind variables in the header of a data declaration with a standalone kind signature. It also adds some clarifications about the number of parameters expected in GADT declarations and in type family declarations. - - - - - 2df92ee1 by Matthew Pickering at 2022-08-02T05:20:01-04:00 testsuite: Correctly set withNativeCodeGen Fixes #21918 - - - - - f2912143 by Matthew Pickering at 2022-08-02T05:20:45-04:00 Fix since annotations in GHC.Stack.CloneStack Fixes #21894 - - - - - aeb8497d by Andreas Klebinger at 2022-08-02T19:26:51-04:00 Add -dsuppress-coercion-types to make coercions even smaller. Instead of `` `cast` <Co:11> :: (Some -> Really -> Large Type)`` simply print `` `cast` <Co:11> :: ... `` - - - - - 97655ad8 by sheaf at 2022-08-02T19:27:29-04:00 User's guide: fix typo in hasfield.rst Fixes #21950 - - - - - 35aef18d by Yiyun Liu at 2022-08-04T02:55:07-04:00 Remove TCvSubst and use Subst for both term and type-level subst This patch removes the TCvSubst data type and instead uses Subst as the environment for both term and type level substitution. This change is partially motivated by the existential type proposal, which will introduce types that contain expressions and therefore forces us to carry around an "IdSubstEnv" even when substituting for types. It also reduces the amount of code because "Subst" and "TCvSubst" share a lot of common operations. There isn't any noticeable impact on performance (geo. mean for ghc/alloc is around 0.0% but we have -94 loc and one less data type to worry abount). Currently, the "TCvSubst" data type for substitution on types is identical to the "Subst" data type except the former doesn't store "IdSubstEnv". Using "Subst" for type-level substitution means there will be a redundant field stored in the data type. However, in cases where the substitution starts from the expression, using "Subst" for type-level substitution saves us from having to project "Subst" into a "TCvSubst". This probably explains why the allocation is mostly even despite the redundant field. The patch deletes "TCvSubst" and moves "Subst" and its relevant functions from "GHC.Core.Subst" into "GHC.Core.TyCo.Subst". Substitution on expressions is still defined in "GHC.Core.Subst" so we don't have to expose the definition of "Expr" in the hs-boot file that "GHC.Core.TyCo.Subst" must import to refer to "IdSubstEnv" (whose codomain is "CoreExpr"). Most functions named fooTCvSubst are renamed into fooSubst with a few exceptions (e.g. "isEmptyTCvSubst" is a distinct function from "isEmptySubst"; the former ignores the emptiness of "IdSubstEnv"). These exceptions mainly exist for performance reasons and will go away when "Expr" and "Type" are mutually recursively defined (we won't be able to take those shortcuts if we can't make the assumption that expressions don't appear in types). - - - - - b99819bd by Krzysztof Gogolewski at 2022-08-04T02:55:43-04:00 Fix TH + defer-type-errors interaction (#21920) Previously, we had to disable defer-type-errors in splices because of #7276. But this fix is no longer necessary, the test T7276 no longer segfaults and is now correctly deferred. - - - - - fb529cae by Andreas Klebinger at 2022-08-04T13:57:25-04:00 Add a note about about W/W for unlifting strict arguments This fixes #21236. - - - - - fffc75a9 by Matthew Pickering at 2022-08-04T13:58:01-04:00 Force safeInferred to avoid retaining extra copy of DynFlags This will only have a (very) modest impact on memory but we don't want to retain old copies of DynFlags hanging around so best to force this value. - - - - - 0f43837f by Matthew Pickering at 2022-08-04T13:58:01-04:00 Force name selectors to ensure no reference to Ids enter the NameCache I observed some unforced thunks in the NameCache which were retaining a whole Id, which ends up retaining a Type.. which ends up retaining old copies of HscEnv containing stale HomeModInfo. - - - - - 0b1f5fd1 by Matthew Pickering at 2022-08-04T13:58:01-04:00 Fix leaks in --make mode when there are module loops This patch fixes quite a tricky leak where we would end up retaining stale ModDetails due to rehydrating modules against non-finalised interfaces. == Loops with multiple boot files It is possible for a module graph to have a loop (SCC, when ignoring boot files) which requires multiple boot files to break. In this case we must perform the necessary hydration steps before and after compiling modules which have boot files which are described above for corectness but also perform an additional hydration step at the end of the SCC to remove space leaks. Consider the following example: ┌───────┐ ┌───────┐ │ │ │ │ │ A │ │ B │ │ │ │ │ └─────┬─┘ └───┬───┘ │ │ ┌────▼─────────▼──┐ │ │ │ C │ └────┬─────────┬──┘ │ │ ┌────▼──┐ ┌───▼───┐ │ │ │ │ │ A-boot│ │ B-boot│ │ │ │ │ └───────┘ └───────┘ A, B and C live together in a SCC. Say we compile the modules in order A-boot, B-boot, C, A, B then when we compile A we will perform the hydration steps (because A has a boot file). Therefore C will be hydrated relative to A, and the ModDetails for A will reference C/A. Then when B is compiled C will be rehydrated again, and so B will reference C/A,B, its interface will be hydrated relative to both A and B. Now there is a space leak because say C is a very big module, there are now two different copies of ModDetails kept alive by modules A and B. The way to avoid this space leak is to rehydrate an entire SCC together at the end of compilation so that all the ModDetails point to interfaces for .hs files. In this example, when we hydrate A, B and C together then both A and B will refer to C/A,B. See #21900 for some more discussion. ------------------------------------------------------- In addition to this simple case, there is also the potential for a leak during parallel upsweep which is also fixed by this patch. Transcibed is Note [ModuleNameSet, efficiency and space leaks] Note [ModuleNameSet, efficiency and space leaks] ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ During unsweep the results of compiling modules are placed into a MVar, to find the environment the module needs to compile itself in the MVar is consulted and the HomeUnitGraph is set accordingly. The reason we do this is that precisely tracking module dependencies and recreating the HUG from scratch each time is very expensive. In serial mode (-j1), this all works out fine because a module can only be compiled after its dependencies have finished compiling and not interleaved with compiling module loops. Therefore when we create the finalised or no loop interfaces, the HUG only contains finalised interfaces. In parallel mode, we have to be more careful because the HUG variable can contain non-finalised interfaces which have been started by another thread. In order to avoid a space leak where a finalised interface is compiled against a HPT which contains a non-finalised interface we have to restrict the HUG to only the visible modules. The visible modules is recording in the ModuleNameSet, this is propagated upwards whilst compiling and explains which transitive modules are visible from a certain point. This set is then used to restrict the HUG before the module is compiled to only the visible modules and thus avoiding this tricky space leak. Efficiency of the ModuleNameSet is of utmost importance because a union occurs for each edge in the module graph. Therefore the set is represented directly as an IntSet which provides suitable performance, even using a UniqSet (which is backed by an IntMap) is too slow. The crucial test of performance here is the time taken to a do a no-op build in --make mode. See test "jspace" for an example which used to trigger this problem. Fixes #21900 - - - - - 1d94a59f by Matthew Pickering at 2022-08-04T13:58:01-04:00 Store interfaces in ModIfaceCache more directly I realised hydration was completely irrelavant for this cache because the ModDetails are pruned from the result. So now it simplifies things a lot to just store the ModIface and Linkable, which we can put into the cache straight away rather than wait for the final version of a HomeModInfo to appear. - - - - - 6c7cd50f by Cheng Shao at 2022-08-04T23:01:45-04:00 cmm: Remove unused ReadOnlyData16 We don't actually emit rodata16 sections anywhere. - - - - - 16333ad7 by Andreas Klebinger at 2022-08-04T23:02:20-04:00 findExternalRules: Don't needlessly traverse the list of rules. - - - - - 52c15674 by Krzysztof Gogolewski at 2022-08-05T12:47:05-04:00 Remove backported items from 9.6 release notes They have been backported to 9.4 in commits 5423d84bd9a28f, 13c81cb6be95c5, 67ccbd6b2d4b9b. - - - - - 78d232f5 by Matthew Pickering at 2022-08-05T12:47:40-04:00 ci: Fix pages job The job has been failing because we don't bundle haddock docs anymore in the docs dist created by hadrian. Fixes #21789 - - - - - 037bc9c9 by Ben Gamari at 2022-08-05T22:00:29-04:00 codeGen/X86: Don't clobber switch variable in switch generation Previously ce8745952f99174ad9d3bdc7697fd086b47cdfb5 assumed that it was safe to clobber the switch variable when generating code for a jump table since we were at the end of a block. However, this assumption is wrong; the register could be live in the jump target. Fixes #21968. - - - - - 50c8e1c5 by Matthew Pickering at 2022-08-05T22:01:04-04:00 Fix equality operator in jspace test - - - - - e9c77a22 by Andreas Klebinger at 2022-08-06T06:13:17-04:00 Improve BUILD_PAP comments - - - - - 41234147 by Andreas Klebinger at 2022-08-06T06:13:17-04:00 Make dropTail comment a haddock comment - - - - - ff11d579 by Andreas Klebinger at 2022-08-06T06:13:17-04:00 Add one more sanity check in stg_restore_cccs - - - - - 1f6c56ae by Andreas Klebinger at 2022-08-06T06:13:17-04:00 StgToCmm: Fix isSimpleScrut when profiling is enabled. When profiling is enabled we must enter functions that might represent thunks in order for their sccs to show up in the profile. We might allocate even if the function is already evaluated in this case. So we can't consider any potential function thunk to be a simple scrut when profiling. Not doing so caused profiled binaries to segfault. - - - - - fab0ee93 by Andreas Klebinger at 2022-08-06T06:13:17-04:00 Change `-fprof-late` to insert cost centres after unfolding creation. The former behaviour of adding cost centres after optimization but before unfoldings are created is not available via the flag `prof-late-inline` instead. I also reduced the overhead of -fprof-late* by pushing the cost centres into lambdas. This means the cost centres will only account for execution of functions and not their partial application. Further I made LATE_CC cost centres it's own CC flavour so they now won't clash with user defined ones if a user uses the same string for a custom scc. LateCC: Don't put cost centres inside constructor workers. With -fprof-late they are rarely useful as the worker is usually inlined. Even if the worker is not inlined or we use -fprof-late-linline they are generally not helpful but bloat compile and run time significantly. So we just don't add sccs inside constructor workers. ------------------------- Metric Decrease: T13701 ------------------------- - - - - - f8bec4e3 by Ben Gamari at 2022-08-06T06:13:53-04:00 gitlab-ci: Fix hadrian bootstrapping of release pipelines Previously we would attempt to test hadrian bootstrapping in the `validate` build flavour. However, `ci.sh` refuses to run validation builds during release pipelines, resulting in job failures. Fix this by testing bootstrapping in the `release` flavour during release pipelines. We also attempted to record perf notes for these builds, which is redundant work and undesirable now since we no longer build in a consistent flavour. - - - - - c0348865 by Ben Gamari at 2022-08-06T11:45:17-04:00 compiler: Eliminate two uses of foldr in favor of foldl' These two uses constructed maps, which is a case where foldl' is generally more efficient since we avoid constructing an intermediate O(n)-depth stack. - - - - - d2e4e123 by Ben Gamari at 2022-08-06T11:45:17-04:00 rts: Fix code style - - - - - 57f530d3 by Ben Gamari at 2022-08-06T11:45:17-04:00 genprimopcode: Drop ArrayArray# references As ArrayArray# no longer exists - - - - - 7267cd52 by Ben Gamari at 2022-08-06T11:45:17-04:00 base: Organize Haddocks in GHC.Conc.Sync - - - - - aa818a9f by Ben Gamari at 2022-08-06T11:48:50-04:00 Add primop to list threads A user came to #ghc yesterday wondering how best to check whether they were leaking threads. We ended up using the eventlog but it seems to me like it would be generally useful if Haskell programs could query their own threads. - - - - - 6d1700b6 by Ben Gamari at 2022-08-06T11:51:35-04:00 rts: Move thread labels into TSO This eliminates the thread label HashTable and instead tracks this information in the TSO, allowing us to use proper StgArrBytes arrays for backing the label and greatly simplifying management of object lifetimes when we expose them to the user with the coming `threadLabel#` primop. - - - - - 1472044b by Ben Gamari at 2022-08-06T11:54:52-04:00 Add a primop to query the label of a thread - - - - - 43f2b271 by Ben Gamari at 2022-08-06T11:55:14-04:00 base: Share finalization thread label For efficiency's sake we float the thread label assigned to the finalization thread to the top-level, ensuring that we only need to encode the label once. - - - - - 1d63b4fb by Ben Gamari at 2022-08-06T11:57:11-04:00 users-guide: Add release notes entry for thread introspection support - - - - - 09bca1de by Ben Gamari at 2022-08-07T01:19:35-04:00 hadrian: Fix binary distribution install attributes Previously we would use plain `cp` to install various parts of the binary distribution. However, `cp`'s behavior w.r.t. file attributes is quite unclear; for this reason it is much better to rather use `install`. Fixes #21965. - - - - - 2b8ea16d by Ben Gamari at 2022-08-07T01:19:35-04:00 hadrian: Fix installation of system-cxx-std-lib package conf - - - - - 7b514848 by Ben Gamari at 2022-08-07T01:20:10-04:00 gitlab-ci: Bump Docker images To give the ARMv7 job access to lld, fixing #21875. - - - - - afa584a3 by Ben Gamari at 2022-08-07T05:08:52-04:00 hadrian: Don't use mk/config.mk.in Ultimately we want to drop mk/config.mk so here I extract the bits needed by the Hadrian bindist installation logic into a Hadrian-specific file. While doing this I fixed binary distribution installation, #21901. - - - - - b9bb45d7 by Ben Gamari at 2022-08-07T05:08:52-04:00 hadrian: Fix naming of cross-compiler wrappers - - - - - 78d04cfa by Ben Gamari at 2022-08-07T11:44:58-04:00 hadrian: Extend xattr Darwin hack to cover /lib As noted in #21506, it is now necessary to remove extended attributes from `/lib` as well as `/bin` to avoid SIP issues on Darwin. Fixes #21506. - - - - - 20457d77 by Andreas Klebinger at 2022-08-08T14:42:26+02:00 NCG(x86): Compile add+shift as lea if possible. - - - - - 742292e4 by Andreas Klebinger at 2022-08-08T16:46:37-04:00 dataToTag#: Skip runtime tag check if argument is infered tagged This addresses one part of #21710. - - - - - 1504a93e by Cheng Shao at 2022-08-08T16:47:14-04:00 rts: remove redundant stg_traceCcszh This out-of-line primop has no Haskell wrapper and hasn't been used anywhere in the tree. Furthermore, the code gets in the way of !7632, so it should be garbage collected. - - - - - a52de3cb by Andreas Klebinger at 2022-08-08T16:47:50-04:00 Document a divergence from the report in parsing function lhss. GHC is happy to parse `(f) x y = x + y` when it should be a parse error based on the Haskell report. Seems harmless enough so we won't fix it but it's documented now. Fixes #19788 - - - - - 5765e133 by Ben Gamari at 2022-08-08T16:48:25-04:00 gitlab-ci: Add release job for aarch64/debian 11 - - - - - 5b26f324 by Ben Gamari at 2022-08-08T19:39:20-04:00 gitlab-ci: Introduce validation job for aarch64 cross-compilation Begins to address #11958. - - - - - e866625c by Ben Gamari at 2022-08-08T19:39:20-04:00 Bump process submodule - - - - - ae707762 by Ben Gamari at 2022-08-08T19:39:20-04:00 gitlab-ci: Add basic support for cross-compiler testiing Here we add a simple qemu-based test for cross-compilers. - - - - - 50912d68 by Ben Gamari at 2022-08-08T19:39:57-04:00 rts: Ensure that Array# card arrays are initialized In #19143 I noticed that newArray# failed to initialize the card table of newly-allocated arrays. However, embarrassingly, I then only fixed the issue in newArrayArray# and, in so doing, introduced the potential for an integer underflow on zero-length arrays (#21962). Here I fix the issue in newArray#, this time ensuring that we do not underflow in pathological cases. Fixes #19143. - - - - - e5ceff56 by Ben Gamari at 2022-08-08T19:39:57-04:00 testsuite: Add test for #21962 - - - - - c1c08bd8 by Ben Gamari at 2022-08-09T02:31:14-04:00 gitlab-ci: Don't use coreutils on Darwin In general we want to ensure that the tested environment is as similar as possible to the environment the user will use. In the case of Darwin, this means we want to use the system's BSD command-line utilities, not coreutils. This would have caught #21974. - - - - - 1c582f44 by Ben Gamari at 2022-08-09T02:31:14-04:00 hadrian: Fix bindist installation on Darwin It turns out that `cp -P` on Darwin does not always copy a symlink as a symlink. In order to get these semantics one must pass `-RP`. It's not entirely clear whether this is valid under POSIX, but it is nevertheless what Apple does. - - - - - 681aa076 by Ben Gamari at 2022-08-09T02:31:49-04:00 hadrian: Fix access mode of installed package registration files Previously hadrian's bindist Makefile would modify package registrations placed by `install` via a shell pipeline and `mv`. However, the use of `mv` means that if umask is set then the user may otherwise end up with package registrations which are inaccessible. Fix this by ensuring that the mode is 0644. - - - - - e9dfd26a by Krzysztof Gogolewski at 2022-08-09T02:32:24-04:00 Cleanups around pretty-printing * Remove hack when printing OccNames. No longer needed since e3dcc0d5 * Remove unused `pprCmms` and `instance Outputable Instr` * Simplify `pprCLabel` (no need to pass platform) * Remove evil `Show`/`Eq` instances for `SDoc`. They were needed by ImmLit, but that can take just a String instead. * Remove instance `Outputable CLabel` - proper output of labels needs a platform, and is done by the `OutputableP` instance - - - - - 66d2e927 by Ben Gamari at 2022-08-09T13:46:48-04:00 rts/linker: Resolve iconv_* on FreeBSD FreeBSD's libiconv includes an implementation of the iconv_* functions in libc. Unfortunately these can only be resolved using dlvsym, which is how the RTS linker usually resolves such functions. To fix this we include an ad-hoc special case for iconv_*. Fixes #20354. - - - - - 5d66a0ce by Ben Gamari at 2022-08-09T13:46:48-04:00 system-cxx-std-lib: Add support for FreeBSD libcxxrt - - - - - ea90e61d by Ben Gamari at 2022-08-09T13:46:48-04:00 gitlab-ci: Bump to use freebsd13 runners - - - - - d71a2051 by sheaf at 2022-08-09T13:47:28-04:00 Fix size_up_alloc to account for UnliftedDatatypes The size_up_alloc function mistakenly considered any type that isn't lifted to not allocate anything, which is wrong. What we want instead is to check the type isn't boxed. This accounts for (BoxedRep Unlifted). Fixes #21939 - - - - - 76b52cf0 by Douglas Wilson at 2022-08-10T06:01:53-04:00 testsuite: 21651 add test for closeFdWith + setNumCapabilities This bug does not affect windows, which does not use the base module GHC.Event.Thread. - - - - - 7589ee72 by Douglas Wilson at 2022-08-10T06:01:53-04:00 base: Fix races in IOManager (setNumCapabilities,closeFdWith) Fix for #21651 Fixes three bugs: - writes to eventManager should be atomic. It is accessed concurrently by ioManagerCapabilitiesChanged and closeFdWith. - The race in closeFdWith described in the ticket. - A race in getSystemEventManager where it accesses the 'IOArray' in 'eventManager' before 'ioManagerCapabilitiesChanged' has written to 'eventManager', causing an Array Index exception. The fix here is to 'yield' and retry. - - - - - dc76439d by Trevis Elser at 2022-08-10T06:02:28-04:00 Updates language extension documentation Adding a 'Status' field with a few values: - Deprecated - Experimental - InternalUseOnly - Noting if included in 'GHC2021', 'Haskell2010' or 'Haskell98' Those values are pulled from the existing descriptions or elsewhere in the documentation. While at it, include the :implied by: where appropriate, to provide more detail. Fixes #21475 - - - - - 823fe5b5 by Jens Petersen at 2022-08-10T06:03:07-04:00 hadrian RunRest: add type signature for stageNumber avoids warning seen on 9.4.1: src/Settings/Builders/RunTest.hs:264:53: warning: [-Wtype-defaults] • Defaulting the following constraints to type ‘Integer’ (Show a0) arising from a use of ‘show’ at src/Settings/Builders/RunTest.hs:264:53-84 (Num a0) arising from a use of ‘stageNumber’ at src/Settings/Builders/RunTest.hs:264:59-83 • In the second argument of ‘(++)’, namely ‘show (stageNumber (C.stage ctx))’ In the second argument of ‘($)’, namely ‘"config.stage=" ++ show (stageNumber (C.stage ctx))’ In the expression: arg $ "config.stage=" ++ show (stageNumber (C.stage ctx)) | 264 | , arg "-e", arg $ "config.stage=" ++ show (stageNumber (C.stage ctx)) | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ compilation tested locally - - - - - f95bbdca by Sylvain Henry at 2022-08-10T09:44:46-04:00 Add support for external static plugins (#20964) This patch adds a new command-line flag: -fplugin-library=<file-path>;<unit-id>;<module>;<args> used like this: -fplugin-library=path/to/plugin.so;package-123;Plugin.Module;["Argument","List"] It allows a plugin to be loaded directly from a shared library. With this approach, GHC doesn't compile anything for the plugin and doesn't load any .hi file for the plugin and its dependencies. As such GHC doesn't need to support two environments (one for plugins, one for target code), which was the more ambitious approach tracked in #14335. Fix #20964 Co-authored-by: Josh Meredith <joshmeredith2008@gmail.com> - - - - - 5bc489ca by Ben Gamari at 2022-08-10T09:45:22-04:00 gitlab-ci: Fix ARMv7 build It appears that the CI refactoring carried out in 5ff690b8474c74e9c968ef31e568c1ad0fe719a1 failed to carry over some critical configuration: setting the build/host/target platforms and forcing use of a non-broken linker. - - - - - 596db9a5 by Ben Gamari at 2022-08-10T09:45:22-04:00 gitlab-ci: Run ARMv7 jobs when ~ARM label is used - - - - - 7cabea7c by Ben Gamari at 2022-08-10T15:37:58-04:00 hadrian: Don't attempt to install documentation if doc/ doesn't exist Previously we would attempt to install documentation even if the `doc` directory doesn't exist (e.g. due to `--docs=none`). This would result in the surprising side-effect of the entire contents of the bindist being installed in the destination documentation directory. Fix this. Fixes #21976. - - - - - 67575f20 by normalcoder at 2022-08-10T15:38:34-04:00 ncg/aarch64: Don't use x18 register on AArch64/Darwin Apple's ABI documentation [1] says: "The platforms reserve register x18. Don’t use this register." While this wasn't problematic in previous Darwin releases, macOS 13 appears to start zeroing this register periodically. See #21964. [1] https://developer.apple.com/documentation/xcode/writing-arm64-code-for-apple... - - - - - 45eb4cbe by Andreas Klebinger at 2022-08-10T22:41:12-04:00 Note [Trimming auto-rules]: State that this improves compiler perf. - - - - - 5c24b1b3 by Andrew Lelechenko at 2022-08-10T22:41:50-04:00 Document that threadDelay / timeout are susceptible to overflows on 32-bit machines - - - - - ff67c79e by Alan Zimmerman at 2022-08-11T16:19:57-04:00 EPA: DotFieldOcc does not have exact print annotations For the code {-# LANGUAGE OverloadedRecordUpdate #-} operatorUpdate f = f{(+) = 1} There are no exact print annotations for the parens around the + symbol, nor does normal ppr print them. This MR fixes that. Closes #21805 Updates haddock submodule - - - - - dca43a04 by Matthew Pickering at 2022-08-11T16:20:33-04:00 Revert "gitlab-ci: Add release job for aarch64/debian 11" This reverts commit 5765e13370634979eb6a0d9f67aa9afa797bee46. The job was not tested before being merged and fails CI (https://gitlab.haskell.org/ghc/ghc/-/jobs/1139392) Ticket #22005 - - - - - ffc9116e by Eric Lindblad at 2022-08-16T09:01:26-04:00 typo - - - - - cd6f5bfd by Ben Gamari at 2022-08-16T09:02:02-04:00 CmmToLlvm: Don't aliasify builtin LLVM variables Our aliasification logic would previously turn builtin LLVM variables into aliases, which apparently confuses LLVM. This manifested in initializers failing to be emitted, resulting in many profiling failures with the LLVM backend. Fixes #22019. - - - - - dc7da356 by Bryan Richter at 2022-08-16T09:02:38-04:00 run_ci: remove monoidal-containers Fixes #21492 MonoidalMap is inlined and used to implement Variables, as before. The top-level value "jobs" is reimplemented as a regular Map, since it doesn't use the monoidal union anyway. - - - - - 64110544 by Cheng Shao at 2022-08-16T09:03:15-04:00 CmmToAsm/AArch64: correct a typo - - - - - f6a5524a by Andreas Klebinger at 2022-08-16T14:34:11-04:00 Fix #21979 - compact-share failing with -O I don't have good reason to believe the optimization level should affect if sharing works or not here. So limit the test to the normal way. - - - - - 68154a9d by Ben Gamari at 2022-08-16T14:34:47-04:00 users-guide: Fix reference to dead llvm-version substitution Fixes #22052. - - - - - 28c60d26 by Ben Gamari at 2022-08-16T14:34:47-04:00 users-guide: Fix incorrect reference to `:extension: role - - - - - 71102c8f by Ben Gamari at 2022-08-16T14:34:47-04:00 users-guide: Add :ghc-flag: reference - - - - - 385f420b by Ben Gamari at 2022-08-16T14:34:47-04:00 hadrian: Place manpage in docroot This relocates it from docs/ to doc/ - - - - - 84598f2e by Ben Gamari at 2022-08-16T14:34:47-04:00 Bump haddock submodule Includes merge of `main` into `ghc-head` as well as some Haddock users guide fixes. - - - - - 59ce787c by Ben Gamari at 2022-08-16T14:34:47-04:00 base: Add changelog entries from ghc-9.2 Closes #21922. - - - - - a14e6ae3 by Ben Gamari at 2022-08-16T14:34:47-04:00 relnotes: Add "included libraries" section As noted in #21988, some users rely on this. - - - - - a4212edc by Ben Gamari at 2022-08-16T14:34:47-04:00 users-guide: Rephrase the rewrite rule documentation Previously the wording was a tad unclear. Fix this. Closes #21114. - - - - - 3e493dfd by Peter Becich at 2022-08-17T08:43:21+01:00 Implement Response File support for HPC This is an improvement to HPC authored by Richard Wallace (https://github.com/purefn) and myself. I have received permission from him to attempt to upstream it. This improvement was originally implemented as a patch to HPC via input-output-hk/haskell.nix: https://github.com/input-output-hk/haskell.nix/pull/1464 Paraphrasing Richard, HPC currently requires all inputs as command line arguments. With large projects this can result in an argument list too long error. I have only seen this error in Nix, but I assume it can occur is a plain Unix environment. This MR adds the standard response file syntax support to HPC. For example you can now pass a file to the command line which contains the arguments. ``` hpc @response_file_1 @response_file_2 ... The contents of a Response File must have this format: COMMAND ... example: report my_library.tix --include=ModuleA --include=ModuleB ``` Updates hpc submodule Co-authored-by: Richard Wallace <rwallace@thewallacepack.net> Fixes #22050 - - - - - 436867d6 by Matthew Pickering at 2022-08-18T09:24:08-04:00 ghc-heap: Fix decoding of TSO closures An extra field was added to the TSO structure in 6d1700b6 but the decoding logic in ghc-heap was not updated for this new field. Fixes #22046 - - - - - a740a4c5 by Matthew Pickering at 2022-08-18T09:24:44-04:00 driver: Honour -x option The -x option is used to manually specify which phase a file should be started to be compiled from (even if it lacks the correct extension). I just failed to implement this when refactoring the driver. In particular Cabal calls GHC with `-E -cpp -x hs Foo.cpphs` to preprocess source files using GHC. I added a test to exercise this case. Fixes #22044 - - - - - e293029d by Simon Peyton Jones at 2022-08-18T09:25:19-04:00 Be more careful in chooseInferredQuantifiers This fixes #22065. We were failing to retain a quantifier that was mentioned in the kind of another retained quantifier. Easy to fix. - - - - - 714c936f by Bryan Richter at 2022-08-18T18:37:21-04:00 testsuite: Add test for #21583 - - - - - 989b844d by Ben Gamari at 2022-08-18T18:37:57-04:00 compiler: Drop --build-id=none hack Since 2011 the object-joining implementation has had a hack to pass `--build-id=none` to `ld` when supported, seemingly to work around a linker bug. This hack is now unnecessary and may break downstream users who expect objects to have valid build-ids. Remove it. Closes #22060. - - - - - 519c712e by Matthew Pickering at 2022-08-19T00:09:11-04:00 Make ru_fn field strict to avoid retaining Ids It's better to perform this projection from Id to Name strictly so we don't retain an old Id (hence IdInfo, hence Unfolding, hence everything etc) - - - - - 7dda04b0 by Matthew Pickering at 2022-08-19T00:09:11-04:00 Force `getOccFS bndr` to avoid retaining reference to Bndr. This is another symptom of #19619 - - - - - 4303acba by Matthew Pickering at 2022-08-19T00:09:11-04:00 Force unfoldings when they are cleaned-up in Tidy and CorePrep If these thunks are not forced then the entire unfolding for the binding is live throughout the whole of CodeGen despite the fact it should have been discarded. Fixes #22071 - - - - - 2361b3bc by Matthew Pickering at 2022-08-19T00:09:47-04:00 haddock docs: Fix links from identifiers to dependent packages When implementing the base_url changes I made the pretty bad mistake of zipping together two lists which were in different orders. The simpler thing to do is just modify `haddockDependencies` to also return the package identifier so that everything stays in sync. Fixes #22001 - - - - - 9a7e2ea1 by Matthew Pickering at 2022-08-19T00:10:23-04:00 Revert "Refactor SpecConstr to use treat bindings uniformly" This reverts commit 415468fef8a3e9181b7eca86de0e05c0cce31729. This refactoring introduced quite a severe residency regression (900MB live from 650MB live when compiling mmark), see #21993 for a reproducer and more discussion. Ticket #21993 - - - - - 9789e845 by Zachary Wood at 2022-08-19T14:17:28-04:00 tc: warn about lazy annotations on unlifted arguments (fixes #21951) - - - - - e5567289 by Andreas Klebinger at 2022-08-19T14:18:03-04:00 Fix #22048 where we failed to drop rules for -fomit-interface-pragmas. Now we also filter the local rules (again) which fixes the issue. - - - - - 51ffd009 by Swann Moreau at 2022-08-19T18:29:21-04:00 Print constraints in quotes (#21167) This patch improves the uniformity of error message formatting by printing constraints in quotes, as we do for types. Fix #21167 - - - - - ab3e0f5a by Sasha Bogicevic at 2022-08-19T18:29:57-04:00 19217 Implicitly quantify type variables in :kind command - - - - - 9939e95f by MorrowM at 2022-08-21T16:51:38-04:00 Recognize file-header pragmas in GHCi (#21507) - - - - - fb7c2d99 by Matthew Pickering at 2022-08-21T16:52:13-04:00 hadrian: Fix bootstrapping with ghc-9.4 The error was that we were trying to link together containers from boot package library (which depends template-haskell in boot package library) template-haskell from in-tree package database So the fix is to build containers in stage0 (and link against template-haskell built in stage0). Fixes #21981 - - - - - b946232c by Mario Blažević at 2022-08-22T22:06:21-04:00 Added pprType with precedence argument, as a prerequisite to fix issues #21723 and #21942. * refines the precedence levels, adding `qualPrec` and `funPrec` to better control parenthesization * `pprParendType`, `pprFunArgType`, and `instance Ppr Type` all just call `pprType` with proper precedence * `ParensT` constructor is now always printed parenthesized * adds the precedence argument to `pprTyApp` as well, as it needs to keep track and pass it down * using `>=` instead of former `>` to match the Core type printing logic * some test outputs have changed, losing extraneous parentheses - - - - - fe4ff0f7 by Mario Blažević at 2022-08-22T22:06:21-04:00 Fix and test for issue #21723 - - - - - 33968354 by Mario Blažević at 2022-08-22T22:06:21-04:00 Test for issue #21942 - - - - - c9655251 by Mario Blažević at 2022-08-22T22:06:21-04:00 Updated the changelog - - - - - 80102356 by Ben Gamari at 2022-08-22T22:06:57-04:00 hadrian: Don't duplicate binaries on installation Previously we used `install` on symbolic links, which ended up copying the target file rather than installing a symbolic link. Fixes #22062. - - - - - b929063e by Matthew Farkas-Dyck at 2022-08-24T02:37:01-04:00 Unbreak Haddock comments in `GHC.Core.Opt.WorkWrap.Utils`. Closes #22092. - - - - - 112e4f9c by Cheng Shao at 2022-08-24T02:37:38-04:00 driver: don't actually merge objects when ar -L works - - - - - a9f0e68e by Ben Gamari at 2022-08-24T02:38:13-04:00 rts: Consistently use MiB in stats output Previously we would say `MB` even where we meant `MiB`. - - - - - a90298cc by Simon Peyton Jones at 2022-08-25T08:38:16+01:00 Fix arityType: -fpedantic-bottoms, join points, etc This MR fixes #21694, #21755. It also makes sure that #21948 and fix to #21694. * For #21694 the underlying problem was that we were calling arityType on an expression that had free join points. This is a Bad Bad Idea. See Note [No free join points in arityType]. * To make "no free join points in arityType" work out I had to avoid trying to use eta-expansion for runRW#. This entailed a few changes in the Simplifier's treatment of runRW#. See GHC.Core.Opt.Simplify.Iteration Note [No eta-expansion in runRW#] * I also made andArityType work correctly with -fpedantic-bottoms; see Note [Combining case branches: andWithTail]. * Rewrote Note [Combining case branches: optimistic one-shot-ness] * arityType previously treated join points differently to other let-bindings. This patch makes them unform; arityType analyses the RHS of all bindings to get its ArityType, and extends am_sigs. I realised that, now we have am_sigs giving the ArityType for let-bound Ids, we don't need the (pre-dating) special code in arityType for join points. But instead we need to extend the env for Rec bindings, which weren't doing before. More uniform now. See Note [arityType for let-bindings]. This meant we could get rid of ae_joins, and in fact get rid of EtaExpandArity altogether. Simpler. * And finally, it was the strange treatment of join-point Ids in arityType (involving a fake ABot type) that led to a serious bug: #21755. Fixed by this refactoring, which treats them uniformly; but without breaking #18328. In fact, the arity for recursive join bindings is pretty tricky; see the long Note [Arity for recursive join bindings] in GHC.Core.Opt.Simplify.Utils. That led to more refactoring, including deciding that an Id could have an Arity that is bigger than its JoinArity; see Note [Invariants on join points], item 2(b) in GHC.Core * Make sure that the "demand threshold" for join points in DmdAnal is no bigger than the join-arity. In GHC.Core.Opt.DmdAnal see Note [Demand signatures are computed for a threshold arity based on idArity] * I moved GHC.Core.Utils.exprIsDeadEnd into GHC.Core.Opt.Arity, where it more properly belongs. * Remove an old, redundant hack in FloatOut. The old Note was Note [Bottoming floats: eta expansion] in GHC.Core.Opt.SetLevels. Compile time improves very slightly on average: Metrics: compile_time/bytes allocated --------------------------------------------------------------------------------------- T18223(normal) ghc/alloc 725,808,720 747,839,216 +3.0% BAD T6048(optasm) ghc/alloc 105,006,104 101,599,472 -3.2% GOOD geo. mean -0.2% minimum -3.2% maximum +3.0% For some reason Windows was better T10421(normal) ghc/alloc 125,888,360 124,129,168 -1.4% GOOD T18140(normal) ghc/alloc 85,974,520 83,884,224 -2.4% GOOD T18698b(normal) ghc/alloc 236,764,568 234,077,288 -1.1% GOOD T18923(normal) ghc/alloc 75,660,528 73,994,512 -2.2% GOOD T6048(optasm) ghc/alloc 112,232,512 108,182,520 -3.6% GOOD geo. mean -0.6% I had a quick look at T18223 but it is knee deep in coercions and the size of everything looks similar before and after. I decided to accept that 3% increase in exchange for goodness elsewhere. Metric Decrease: T10421 T18140 T18698b T18923 T6048 Metric Increase: T18223 - - - - - 909edcfc by Ben Gamari at 2022-08-25T10:03:34-04:00 upload_ghc_libs: Add means of passing Hackage credentials - - - - - 28402eed by M Farkas-Dyck at 2022-08-25T10:04:17-04:00 Scrub some partiality in `CommonBlockElim`. - - - - - 54affbfa by Ben Gamari at 2022-08-25T20:05:31-04:00 hadrian: Fix whitespace Previously this region of Settings.Packages was incorrectly indented. - - - - - c4bba0f0 by Ben Gamari at 2022-08-25T20:05:31-04:00 validate: Drop --legacy flag In preparation for removal of the legacy `make`-based build system. - - - - - 822b0302 by Ben Gamari at 2022-08-25T20:05:31-04:00 gitlab-ci: Drop make build validation jobs In preparation for removal of the `make`-based build system - - - - - 6fd9b0a1 by Ben Gamari at 2022-08-25T20:05:31-04:00 Drop make build system Here we at long last remove the `make`-based build system, it having been replaced with the Shake-based Hadrian build system. Users are encouraged to refer to the documentation in `hadrian/doc` and this [1] blog post for details on using Hadrian. Closes #17527. [1] https://www.haskell.org/ghc/blog/20220805-make-to-hadrian.html - - - - - dbb004b0 by Ben Gamari at 2022-08-25T20:05:31-04:00 Remove testsuite/tests/perf/haddock/.gitignore As noted in #16802, this is no longer needed. Closes #16802. - - - - - fe9d824d by Ben Gamari at 2022-08-25T20:05:31-04:00 Drop hc-build script This has not worked for many, many years and relied on the now-removed `make`-based build system. - - - - - 659502bc by Ben Gamari at 2022-08-25T20:05:31-04:00 Drop mkdirhier This is only used by nofib's dead `dist` target - - - - - 4a426924 by Ben Gamari at 2022-08-25T20:05:31-04:00 Drop mk/{build,install,config}.mk.in - - - - - 46924b75 by Ben Gamari at 2022-08-25T20:05:31-04:00 compiler: Drop comment references to make - - - - - d387f687 by Harry Garrood at 2022-08-25T20:06:10-04:00 Add inits1 and tails1 to Data.List.NonEmpty See https://github.com/haskell/core-libraries-committee/issues/67 - - - - - 8603c921 by Harry Garrood at 2022-08-25T20:06:10-04:00 Add since annotations and changelog entries - - - - - 6b47aa1c by Krzysztof Gogolewski at 2022-08-25T20:06:46-04:00 Fix redundant import This fixes a build error on x86_64-linux-alpine3_12-validate. See the function 'loadExternalPlugins' defined in this file. - - - - - 4786acf7 by sheaf at 2022-08-26T15:05:23-04:00 Pmc: consider any 2 dicts of the same type equal This patch massages the keys used in the `TmOracle` `CoreMap` to ensure that dictionaries of coherent classes give the same key. That is, whenever we have an expression we want to insert or lookup in the `TmOracle` `CoreMap`, we first replace any dictionary `$dict_abcd :: ct` with a value of the form `error @ct`. This allows us to common-up view pattern functions with required constraints whose arguments differed only in the uniques of the dictionaries they were provided, thus fixing #21662. This is a rather ad-hoc change to the keys used in the `TmOracle` `CoreMap`. In the long run, we would probably want to use a different representation for the keys instead of simply using `CoreExpr` as-is. This more ambitious plan is outlined in #19272. Fixes #21662 Updates unix submodule - - - - - f5e0f086 by Krzysztof Gogolewski at 2022-08-26T15:06:01-04:00 Remove label style from printing context Previously, the SDocContext used for code generation contained information whether the labels should use Asm or C style. However, at every individual call site, this is known statically. This removes the parameter to 'PprCode' and replaces every 'pdoc' used to print a label in code style with 'pprCLabel' or 'pprAsmLabel'. The OutputableP instance is now used only for dumps. The output of T15155 changes, it now uses the Asm style (which is faithful to what actually happens). - - - - - 1007829b by Cheng Shao at 2022-08-26T15:06:40-04:00 boot: cleanup legacy args Cleanup legacy boot script args, following removal of the legacy make build system. - - - - - 95fe09da by Simon Peyton Jones at 2022-08-27T00:29:02-04:00 Improve SpecConstr for evals As #21763 showed, we were over-specialising in some cases, when the function involved was doing a simple 'eval', but not taking the value apart, or branching on it. This MR fixes the problem. See Note [Do not specialise evals]. Nofib barely budges, except that spectral/cichelli allocates about 3% less. Compiler bytes-allocated improves a bit geo. mean -0.1% minimum -0.5% maximum +0.0% The -0.5% is on T11303b, for what it's worth. - - - - - 565a8ec8 by Matthew Pickering at 2022-08-27T00:29:39-04:00 Revert "Revert "Refactor SpecConstr to use treat bindings uniformly"" This reverts commit 851d8dd89a7955864b66a3da8b25f1dd88a503f8. This commit was originally reverted due to an increase in space usage. This was diagnosed as because the SCE increased in size and that was being retained by another leak. See #22102 - - - - - 82ce1654 by Matthew Pickering at 2022-08-27T00:29:39-04:00 Avoid retaining bindings via ModGuts held on the stack It's better to overwrite the bindings fields of the ModGuts before starting an iteration as then all the old bindings can be collected as soon as the simplifier has processed them. Otherwise we end up with the old bindings being alive until right at the end of the simplifier pass as the mg_binds field is only modified right at the end. - - - - - 64779dcd by Matthew Pickering at 2022-08-27T00:29:39-04:00 Force imposs_deflt_cons in filterAlts This fixes a pretty serious space leak as the forced thunk would retain `Alt b` values which would then contain reference to a lot of old bindings and other simplifier gunk. The OtherCon unfolding was not forced on subsequent simplifier runs so more and more old stuff would be retained until the end of simplification. Fixing this has a drastic effect on maximum residency for the mmark package which goes from ``` 45,005,401,056 bytes allocated in the heap 17,227,721,856 bytes copied during GC 818,281,720 bytes maximum residency (33 sample(s)) 9,659,144 bytes maximum slop 2245 MiB total memory in use (0 MB lost due to fragmentation) ``` to ``` 45,039,453,304 bytes allocated in the heap 13,128,181,400 bytes copied during GC 331,546,608 bytes maximum residency (40 sample(s)) 7,471,120 bytes maximum slop 916 MiB total memory in use (0 MB lost due to fragmentation) ``` See #21993 for some more discussion. - - - - - a3b23a33 by Matthew Pickering at 2022-08-27T00:29:39-04:00 Use Solo to avoid retaining the SCE but to avoid performing the substitution The use of Solo here allows us to force the selection into the SCE to obtain the Subst but without forcing the substitution to be applied. The resulting thunk is placed into a lazy field which is rarely forced, so forcing it regresses peformance. - - - - - 161a6f1f by Simon Peyton Jones at 2022-08-27T00:30:14-04:00 Fix a nasty loop in Tidy As the remarkably-simple #22112 showed, we were making a black hole in the unfolding of a self-recursive binding. Boo! It's a bit tricky. Documented in GHC.Iface.Tidy, Note [tidyTopUnfolding: avoiding black holes] - - - - - 68e6786f by Giles Anderson at 2022-08-29T00:01:35+02:00 Use TcRnDiagnostic in GHC.Tc.TyCl.Class (#20117) The following `TcRnDiagnostic` messages have been introduced: TcRnIllegalHsigDefaultMethods TcRnBadGenericMethod TcRnWarningMinimalDefIncomplete TcRnDefaultMethodForPragmaLacksBinding TcRnIgnoreSpecialisePragmaOnDefMethod TcRnBadMethodErr TcRnNoExplicitAssocTypeOrDefaultDeclaration - - - - - cbe51ac5 by Simon Peyton Jones at 2022-08-29T04:18:57-04:00 Fix a bug in anyInRnEnvR This bug was a subtle error in anyInRnEnvR, introduced by commit d4d3fe6e02c0eb2117dbbc9df72ae394edf50f06 Author: Andreas Klebinger <klebinger.andreas@gmx.at> Date: Sat Jul 9 01:19:52 2022 +0200 Rule matching: Don't compute the FVs if we don't look at them. The net result was #22028, where a rewrite rule would wrongly match on a lambda. The fix to that function is easy. - - - - - 0154bc80 by sheaf at 2022-08-30T06:05:41-04:00 Various Hadrian bootstrapping fixes - Don't always produce a distribution archive (#21629) - Use correct executable names for ghc-pkg and hsc2hs on windows (we were missing the .exe file extension) - Fix a bug where we weren't using the right archive format on Windows when unpacking the bootstrap sources. Fixes #21629 - - - - - 451b1d90 by Matthew Pickering at 2022-08-30T06:06:16-04:00 ci: Attempt using normal submodule cloning strategy We do not use any recursively cloned submodules, and this protects us from flaky upstream remotes. Fixes #22121 - - - - - 9d5ad7c4 by Pi Delport at 2022-08-30T22:40:46+00:00 Fix typo in Any docs: stray "--" - - - - - 3a002632 by Pi Delport at 2022-08-30T22:40:46+00:00 Fix typo in Any docs: syntatic -> syntactic - - - - - 7f490b13 by Simon Peyton Jones at 2022-08-31T03:53:54-04:00 Add a missing trimArityType This buglet was exposed by #22114, a consequence of my earlier refactoring of arity for join points. - - - - - e6fc820f by Ben Gamari at 2022-08-31T13:16:01+01:00 Bump binary submodule to 0.8.9.1 - - - - - 4c1e7b22 by Ben Gamari at 2022-08-31T13:16:01+01:00 Bump stm submodule to 2.5.1.0 - - - - - 837472b4 by Ben Gamari at 2022-08-31T13:16:01+01:00 users-guide: Document system-cxx-std-lib - - - - - f7a9947a by Douglas Wilson at 2022-08-31T13:16:01+01:00 Update submodule containers to 0.6.6 - - - - - 4ab1c2ca by Douglas Wilson at 2022-08-31T13:16:02+01:00 Update submodule process to 1.6.15.0 - - - - - 1309ea1e by Ben Gamari at 2022-08-31T13:16:02+01:00 Bump directory submodule to 1.3.7.1 - - - - - 7962a33a by Douglas Wilson at 2022-08-31T13:16:02+01:00 Bump text submodule to 2.0.1 - - - - - fd8d80c3 by Ben Gamari at 2022-08-31T13:26:52+01:00 Bump deepseq submodule to 1.4.8.0 - - - - - a9baafac by Ben Gamari at 2022-08-31T13:26:52+01:00 Add dates to base, ghc-prim changelogs - - - - - 2cee323c by Ben Gamari at 2022-08-31T13:26:52+01:00 Update autoconf scripts Scripts taken from autoconf 02ba26b218d3d3db6c56e014655faf463cefa983 - - - - - e62705ff by Ben Gamari at 2022-08-31T13:26:53+01:00 Bump bytestring submodule to 0.11.3.1 - - - - - f7b4dcbd by Douglas Wilson at 2022-08-31T13:26:53+01:00 Update submodule Cabal to tag Cabal-v3.8.1.0 closes #21931 - - - - - e8eaf807 by Matthew Pickering at 2022-08-31T18:27:57-04:00 Refine in-tree compiler args for --test-compiler=stage1 Some of the logic to calculate in-tree arguments was not correct for the stage1 compiler. Namely we were not correctly reporting whether we were building static or dynamic executables and whether debug assertions were enabled. Fixes #22096 - - - - - 6b2f7ffe by Matthew Pickering at 2022-08-31T18:27:57-04:00 Make ghcDebugAssertions into a Stage predicate (Stage -> Bool) We also care whether we have debug assertions enabled for a stage one compiler, but the way which we turned on the assertions was quite different from the stage2 compiler. This makes the logic for turning on consistent across both and has the advantage of being able to correct determine in in-tree args whether a flavour enables assertions or not. Ticket #22096 - - - - - 15111af6 by Zubin Duggal at 2022-09-01T01:18:50-04:00 Add regression test for #21550 This was fixed by ca90ffa321a31842a32be1b5b6e26743cd677ec5 "Use local instances with least superclass depth" - - - - - 7d3a055d by Krzysztof Gogolewski at 2022-09-01T01:19:26-04:00 Minor cleanup - Remove mkHeteroCoercionType, sdocImpredicativeTypes, isStateType (unused), isCoVar_maybe (duplicated by getCoVar_maybe) - Replace a few occurrences of voidPrimId with (# #). void# is a deprecated synonym for the unboxed tuple. - Use showSDoc in :show linker. This makes it consistent with the other :show commands - - - - - 31a8989a by Tommy Bidne at 2022-09-01T12:01:20-04:00 Change Ord defaults per CLC proposal Approved by CLC in https://github.com/haskell/core-libraries-committee/issues/24#issuecomment-1... - - - - - 7f527f01 by Matthew Pickering at 2022-09-01T12:01:56-04:00 Fix bootstrap with ghc-9.0 It turns out Solo is a very recent addition to base, so for older GHC versions we just defined it inline here the one place we use it in the compiler. - - - - - d2be80fd by Sebastian Graf at 2022-09-05T23:12:14-04:00 DmdAnal: Don't panic in addCaseBndrDmd (#22039) Rather conservatively return Top. See Note [Untyped demand on case-alternative binders]. I also factored `addCaseBndrDmd` into two separate functions `scrutSubDmd` and `fieldBndrDmds`. Fixes #22039. - - - - - 25f68ace by Ben Gamari at 2022-09-05T23:12:50-04:00 gitlab-ci: Ensure that ghc derivation is in scope Previously the lint-ci job attempted to use cabal-install (specifically `cabal update`) without a GHC in PATH. However, cabal-install-3.8 appears to want GHC, even for `cabal update`. - - - - - f37b621f by sheaf at 2022-09-06T11:51:53+00:00 Update instances.rst, clarifying InstanceSigs Fixes #22103 - - - - - d4f908f7 by Jan Hrček at 2022-09-06T15:36:58-04:00 Fix :add docs in user guide - - - - - 808bb793 by Cheng Shao at 2022-09-06T15:37:35-04:00 ci: remove unused build_make/test_make in ci script - - - - - d0a2efb2 by Eric Lindblad at 2022-09-07T16:42:45-04:00 typo - - - - - fac0098b by Eric Lindblad at 2022-09-07T16:42:45-04:00 typos - - - - - a581186f by Eric Lindblad at 2022-09-07T16:42:45-04:00 whitespace - - - - - 04a738cb by Cheng Shao at 2022-09-07T16:43:22-04:00 CmmToAsm: remove unused ModLocation from NatM_State - - - - - ee1cfaa9 by Krzysztof Gogolewski at 2022-09-07T16:43:58-04:00 Minor SDoc cleanup Change calls to renderWithContext with showSDocOneLine; it's more efficient and explanatory. Remove polyPatSig (unused) - - - - - 7918265d by Krzysztof Gogolewski at 2022-09-07T16:43:58-04:00 Remove Outputable Char instance Use 'text' instead of 'ppr'. Using 'ppr' on the list "hello" rendered as "h,e,l,l,o". - - - - - 77209ab3 by Georgi Lyubenov at 2022-09-08T17:14:36+03:00 Export liftA2 from Prelude Changes: In order to be warning free and compatible, we hide Applicative(..) from Prelude in a few places and instead import it directly from Control.Applicative. Please see the migration guide at https://github.com/haskell/core-libraries-committee/blob/main/guides/export-... for more details. This means that Applicative is now exported in its entirety from Prelude. Motivation: This change is motivated by a few things: * liftA2 is an often used function, even more so than (<*>) for some people. * When implementing Applicative, the compiler will prompt you for either an implementation of (<*>) or of liftA2, but trying to use the latter ends with an error, without further imports. This could be confusing for newbies. * For teaching, it is often times easier to introduce liftA2 first, as it is a natural generalisation of fmap. * This change seems to have been unanimously and enthusiastically accepted by the CLC members, possibly indicating a lot of love for it. * This change causes very limited breakage, see the linked issue below for an investigation on this. See https://github.com/haskell/core-libraries-committee/issues/50 for the surrounding discussion and more details. - - - - - 442a94e8 by Georgi Lyubenov at 2022-09-08T17:14:36+03:00 Add changelog entry for liftA2 export from Prelude - - - - - fb968680 by Georgi Lyubenov at 2022-09-08T17:14:36+03:00 Bump submodule containers to one with liftA2 warnings fixed - - - - - f54ff818 by Georgi Lyubenov at 2022-09-08T17:14:36+03:00 Bump submodule Cabal to one with liftA2 warnings fixed - - - - - a4b34808 by Georgi Lyubenov at 2022-09-08T17:14:36+03:00 Isolate some Applicative hidings to GHC.Prelude By reexporting the entirety of Applicative from GHC.Prelude, we can save ourselves some `hiding` and importing of `Applicative` in consumers of GHC.Prelude. This also has the benefit of isolating this type of change to GHC.Prelude, so that people in the future don't have to think about it. - - - - - 9c4ea90c by Cheng Shao at 2022-09-08T17:49:47-04:00 CmmToC: enable 64-bit CallishMachOp on 32-bit targets Normally, the unregisterised builds avoid generating 64-bit CallishMachOp in StgToCmm, so CmmToC doesn't support these. However, there do exist cases where we'd like to invoke cmmToC for other cmm inputs which may contain such CallishMachOps, and it's a rather low effort to add support for these since they only require calling into existing ghc-prim cbits. - - - - - 04062510 by Alexis King at 2022-09-11T11:30:32+02:00 Add native delimited continuations to the RTS This patch implements GHC proposal 313, "Delimited continuation primops", by adding native support for delimited continuations to the GHC RTS. All things considered, the patch is relatively small. It almost exclusively consists of changes to the RTS; the compiler itself is essentially unaffected. The primops come with fairly extensive Haddock documentation, and an overview of the implementation strategy is given in the Notes in rts/Continuation.c. This first stab at the implementation prioritizes simplicity over performance. Most notably, every continuation is always stored as a single, contiguous chunk of stack. If one of these chunks is particularly large, it can result in poor performance, as the current implementation does not attempt to cleverly squeeze a subset of the stack frames into the existing stack: it must fit all at once. If this proves to be a performance issue in practice, a cleverer strategy would be a worthwhile target for future improvements. - - - - - ee471dfb by Cheng Shao at 2022-09-12T07:07:33-04:00 rts: fix missing dirty_MVAR argument in stg_writeIOPortzh - - - - - a5f9c35f by Cheng Shao at 2022-09-12T13:29:05-04:00 ci: enable parallel compression for xz - - - - - 3a815f30 by Ryan Scott at 2022-09-12T13:29:41-04:00 Windows: Always define _UCRT when compiling C code As seen in #22159, this is required to ensure correct behavior when MinGW-w64 headers are in the `C_INCLUDE_PATH`. Fixes #22159. - - - - - 65a0bd69 by sheaf at 2022-09-13T10:27:52-04:00 Add diagnostic codes This MR adds diagnostic codes, assigning unique numeric codes to error and warnings, e.g. error: [GHC-53633] Pattern match is redundant This is achieved as follows: - a type family GhcDiagnosticCode that gives the diagnostic code for each diagnostic constructor, - a type family ConRecursInto that specifies whether to recur into an argument of the constructor to obtain a more fine-grained code (e.g. different error codes for different 'deriving' errors), - generics machinery to generate the value-level function assigning each diagnostic its error code; see Note [Diagnostic codes using generics] in GHC.Types.Error.Codes. The upshot is that, to add a new diagnostic code, contributors only need to modify the two type families mentioned above. All logic relating to diagnostic codes is thus contained to the GHC.Types.Error.Codes module, with no code duplication. This MR also refactors error message datatypes a bit, ensuring we can derive Generic for them, and cleans up the logic around constraint solver reports by splitting up 'TcSolverReportInfo' into separate datatypes (see #20772). Fixes #21684 - - - - - 362cca13 by sheaf at 2022-09-13T10:27:53-04:00 Diagnostic codes: acccept test changes The testsuite output now contains diagnostic codes, so many tests need to be updated at once. We decided it was best to keep the diagnostic codes in the testsuite output, so that contributors don't inadvertently make changes to the diagnostic codes. - - - - - 08f6730c by Adam Gundry at 2022-09-13T10:28:29-04:00 Allow imports to reference multiple fields with the same name (#21625) If a module `M` exports two fields `f` (using DuplicateRecordFields), we can still accept import M (f) import M hiding (f) and treat `f` as referencing both of them. This was accepted in GHC 9.0, but gave rise to an ambiguity error in GHC 9.2. See #21625. This patch also documents this behaviour in the user's guide, and updates the test for #16745 which is now treated differently. - - - - - c14370d7 by Cheng Shao at 2022-09-13T10:29:07-04:00 ci: remove unused appveyor config - - - - - dc6af9ed by Cheng Shao at 2022-09-13T10:29:45-04:00 compiler: remove unused lazy state monad - - - - - 646d15ad by Eric Lindblad at 2022-09-14T03:13:56-04:00 Fix typos This fixes various typos and spelling mistakes in the compiler. Fixes #21891 - - - - - 7d7e71b0 by Matthew Pickering at 2022-09-14T03:14:32-04:00 hadrian: Bump index state This bumps the index state so a build plan can also be found when booting with 9.4. Fixes #22165 - - - - - 98b62871 by Matthew Pickering at 2022-09-14T17:17:04-04:00 hadrian: Use a stamp file to record when a package is built in a certain way Before this patch which library ways we had built wasn't recorded directly. So you would run into issues if you build the .conf file with some library ways before switching the library ways which you wanted to build. Now there is one stamp file for each way, so in order to build a specific way you can need that specific stamp file rather than going indirectly via the .conf file. - - - - - b42cedbe by Matthew Pickering at 2022-09-14T17:17:04-04:00 hadrian: Inplace/Final package databases There are now two different package databases per stage. An inplace package database contains .conf files which point directly into the build directories. The final package database contains .conf files which point into the installed locations. The inplace .conf files are created before any building happens and have fake ABI hash values. The final .conf files are created after a package finished building and contains the proper ABI has. The motivation for this is to make the dependency structure more fine-grained when building modules. Now a module depends just depends directly on M.o from package p rather than the .conf file depend on the .conf file for package p. So when all of a modules direct dependencies have finished building we can start building it rather than waiting for the whole package to finish. The secondary motivation is that the multi-repl doesn't need to build everything before starting the multi-repl session. We can just configure the inplace package-db and use that in order to start the repl. - - - - - 6515c32b by Matthew Pickering at 2022-09-14T17:17:04-04:00 hadrian: Add some more packages to multi-cradle The main improvement here is to pass `-this-unit-id` for executables so that they can be added to the multi-cradle if desired as well as normal library packages. - - - - - e470e91f by Matthew Pickering at 2022-09-14T17:17:04-04:00 hadrian: Need builders needed by Cabal Configure in parallel Because of the use of withStaged (which needs the necessary builder) when configuring a package, the builds of stage1:exe:ghc-bin and stage1:exe:ghc-pkg where being linearised when building a specific target like `binary-dist-dir`. Thankfully the fix is quite local, to supply all the `withStaged` arguments together so the needs can be batched together and hence performed in parallel. Fixes #22093 - - - - - c4438347 by Matthew Pickering at 2022-09-14T17:17:04-04:00 Remove stage1:exe:ghc-bin pre-build from CI script CI builds stage1:exe:ghc-bin before the binary-dist target which introduces some quite bad linearisation (see #22093) because we don't build stage1 compiler in parallel with anything. Then when the binary-dist target is started we have to build stage1:exe:ghc-pkg before doing anything. Fixes #22094 - - - - - 71d8db86 by Matthew Pickering at 2022-09-14T17:17:04-04:00 hadrian: Add extra implicit dependencies from DeriveLift ghc -M should know that modules which use DeriveLift (or TemplateHaskellQuotes) need TH.Lib.Internal but until it does, we have to add these extra edges manually or the modules will be compiled before TH.Lib.Internal is compiled which leads to a desugarer error. - - - - - 43e574f0 by Greg Steuck at 2022-09-14T17:17:43-04:00 Repair c++ probing on OpenBSD Failure without this change: ``` checking C++ standard library flavour... libc++ checking for linkage against 'c++ c++abi'... failed checking for linkage against 'c++ cxxrt'... failed configure: error: Failed to find C++ standard library ``` - - - - - 534b39ee by Douglas Wilson at 2022-09-14T17:18:21-04:00 libraries: template-haskell: vendor filepath differently Vendoring with ../ in hs-source-dirs prevents upload to hackage. (cherry picked from commit 1446be7586ba70f9136496f9b67f792955447842) - - - - - bdd61cd6 by M Farkas-Dyck at 2022-09-14T22:39:34-04:00 Unbreak Hadrian with Cabal 3.8. - - - - - df04d6ec by Krzysztof Gogolewski at 2022-09-14T22:40:09-04:00 Fix typos - - - - - d6ea8356 by Andreas Klebinger at 2022-09-15T10:12:41+02:00 Tag inference: Fix #21954 by retaining tagsigs of vars in function position. For an expression like: case x of y Con z -> z If we also retain the tag sig for z we can generate code to immediately return it rather than calling out to stg_ap_0_fast. - - - - - 7cce7007 by Andreas Klebinger at 2022-09-15T10:12:42+02:00 Stg.InferTags.Rewrite - Avoid some thunks. - - - - - 88c4cbdb by Cheng Shao at 2022-09-16T13:57:56-04:00 hadrian: enable -fprof-late only for profiling ways - - - - - d7235831 by Cheng Shao at 2022-09-16T13:57:56-04:00 hadrian: add late_ccs flavour transformer - - - - - ce203753 by Cheng Shao at 2022-09-16T13:58:34-04:00 configure: remove unused program checks - - - - - 9b4c1056 by Pierre Le Marre at 2022-09-16T13:59:16-04:00 Update to Unicode 15.0 - - - - - c6e9b89a by Andrew Lelechenko at 2022-09-16T13:59:55-04:00 Avoid partial head and tail in ghc-heap; replace with total pattern-matching - - - - - 616afde3 by Cheng Shao at 2022-09-16T14:00:33-04:00 hadrian: relax Cabal upper bound to allow building with Cabal-3.8 A follow up of !8910. - - - - - df35d994 by Alexis King at 2022-09-16T14:01:11-04:00 Add links to the continuations haddocks in the docs for each primop fixes #22176 - - - - - 383f7549 by Matthew Pickering at 2022-09-16T21:42:10-04:00 -Wunused-pattern-binds: Recurse into patterns to check whether there's a splice See the examples in #22057 which show we have to traverse deeply into a pattern to determine whether it contains a splice or not. The original implementation pointed this out but deemed this very shallow traversal "too expensive". Fixes #22057 I also fixed an oversight in !7821 which meant we lost a warning which was present in 9.2.2. Fixes #22067 - - - - - 5031bf49 by sheaf at 2022-09-16T21:42:49-04:00 Hadrian: Don't try to build terminfo on Windows Commit b42cedbe introduced a dependency on terminfo on Windows, but that package isn't available on Windows. - - - - - c9afe221 by M Farkas-Dyck at 2022-09-17T06:44:47-04:00 Clean up some. In particular: • Delete some dead code, largely under `GHC.Utils`. • Clean up a few definitions in `GHC.Utils.(Misc, Monad)`. • Clean up `GHC.Types.SrcLoc`. • Derive stock `Functor, Foldable, Traversable` for more types. • Derive more instances for newtypes. Bump haddock submodule. - - - - - 85431ac3 by Cheng Shao at 2022-09-17T06:45:25-04:00 driver: pass original Cmm filename in ModLocation When compiling Cmm, the ml_hs_file field is used to indicate Cmm filename when later generating DWARF information. We should pass the original filename here, otherwise for preprocessed Cmm files, the filename will be a temporary filename which is confusing. - - - - - 63aa0069 by Cheng Shao at 2022-09-17T06:46:04-04:00 rts: remove legacy logging cabal flag - - - - - bd0f4184 by Cheng Shao at 2022-09-17T06:46:04-04:00 rts: make threaded ways optional For certain targets (e.g. wasm32-wasi), the threaded rts is known not to work. This patch adds a "threaded" cabal flag to rts to make threaded rts ways optional. Hadrian enables this flag iff the flavour rtsWays contains threaded ways. - - - - - 8a666ad2 by Ryan Scott at 2022-09-18T08:00:44-04:00 DeriveFunctor: Check for last type variables using dataConUnivTyVars Previously, derived instances of `Functor` (as well as the related classes `Foldable`, `Traversable`, and `Generic1`) would determine which constraints to infer by checking for fields that contain the last type variable. The problem was that this last type variable was taken from `tyConTyVars`. For GADTs, the type variables in each data constructor are _not_ the same type variables as in `tyConTyVars`, leading to #22167. This fixes the issue by instead checking for the last type variable using `dataConUnivTyVars`. (This is very similar in spirit to the fix for #21185, which also replaced an errant use of `tyConTyVars` with type variables from each data constructor.) Fixes #22167. - - - - - 78037167 by Vladislav Zavialov at 2022-09-18T08:01:20-04:00 Lexer: pass updated buffer to actions (#22201) In the lexer, predicates have the following type: { ... } :: user -- predicate state -> AlexInput -- input stream before the token -> Int -- length of the token -> AlexInput -- input stream after the token -> Bool -- True <=> accept the token This is documented in the Alex manual. There is access to the input stream both before and after the token. But when the time comes to construct the token, GHC passes only the initial string buffer to the lexer action. This patch fixes it: - type Action = PsSpan -> StringBuffer -> Int -> P (PsLocated Token) + type Action = PsSpan -> StringBuffer -> Int -> StringBuffer -> P (PsLocated Token) Now lexer actions have access to the string buffer both before and after the token, just like the predicates. It's just a matter of passing an additional function parameter throughout the lexer. - - - - - 75746594 by Vladislav Zavialov at 2022-09-18T08:01:20-04:00 Lexer: define varsym without predicates (#22201) Before this patch, the varsym lexing rules were defined as follows: <0> { @varsym / { precededByClosingToken `alexAndPred` followedByOpeningToken } { varsym_tight_infix } @varsym / { followedByOpeningToken } { varsym_prefix } @varsym / { precededByClosingToken } { varsym_suffix } @varsym { varsym_loose_infix } } Unfortunately, this meant that the predicates 'precededByClosingToken' and 'followedByOpeningToken' were recomputed several times before we could figure out the whitespace context. With this patch, we check for whitespace context directly in the lexer action: <0> { @varsym { with_op_ws varsym } } The checking for opening/closing tokens happens in 'with_op_ws' now, which is part of the lexer action rather than the lexer predicate. - - - - - c1f81b38 by Matthew Farkas-Dyck at 2022-09-19T09:07:05-04:00 Scrub partiality about `NewOrData`. Rather than a list of constructors and a `NewOrData` flag, we define `data DataDefnCons a = NewTypeCon a | DataTypeCons [a]`, which enforces a newtype to have exactly one constructor. Closes #22070. Bump haddock submodule. - - - - - 1e1ed8c5 by Cheng Shao at 2022-09-19T09:07:43-04:00 CmmToC: emit __builtin_unreachable() after noreturn ccalls Emit a __builtin_unreachable() call after a foreign call marked as CmmNeverReturns. This is crucial to generate correctly typed code for wasm; as for other archs, this is also beneficial for the C compiler optimizations. - - - - - 19f45a25 by Jan Hrček at 2022-09-20T03:49:29-04:00 Document :unadd GHCi command in user guide - - - - - 545ff490 by sheaf at 2022-09-20T03:50:06-04:00 Hadrian: merge archives even in stage 0 We now always merge .a archives when ar supports -L. This change is necessary in order to bootstrap GHC using GHC 9.4 on Windows, as nested archives aren't supported. Not doing so triggered bug #21990 when trying to use the Win32 package, with errors such as: Not a x86_64 PE+ file. Unknown COFF 4 type in getHeaderInfo. ld.lld: error: undefined symbol: Win32zm2zi12zi0zi0_SystemziWin32ziConsoleziCtrlHandler_withConsoleCtrlHandler1_info We have to be careful about which ar is meant: in stage 0, the check should be done on the system ar (system-ar in system.config). - - - - - 59fe128c by Vladislav Zavialov at 2022-09-20T03:50:42-04:00 Fix -Woperator-whitespace for consym (part of #19372) Due to an oversight, the initial specification and implementation of -Woperator-whitespace focused on varsym exclusively and completely ignored consym. This meant that expressions such as "x+ y" would produce a warning, while "x:+ y" would not. The specification was corrected in ghc-proposals pull request #404, and this patch updates the implementation accordingly. Regression test included. - - - - - c4c2cca0 by John Ericson at 2022-09-20T13:11:49-04:00 Add `Eq` and `Ord` instances for `Generically1` These are needed so the subsequent commit overhauling the `*1` classes type-checks. - - - - - 7beb356e by John Ericson at 2022-09-20T13:11:50-04:00 Relax instances for Functor combinators; put superclass on Class1 and Class2 to make non-breaking This change is approved by the Core Libraries commitee in https://github.com/haskell/core-libraries-committee/issues/10 The first change makes the `Eq`, `Ord`, `Show`, and `Read` instances for `Sum`, `Product`, and `Compose` match those for `:+:`, `:*:`, and `:.:`. These have the proper flexible contexts that are exactly what the instance needs: For example, instead of ```haskell instance (Eq1 f, Eq1 g, Eq a) => Eq (Compose f g a) where (==) = eq1 ``` we do ```haskell deriving instance Eq (f (g a)) => Eq (Compose f g a) ``` But, that change alone is rather breaking, because until now `Eq (f a)` and `Eq1 f` (and respectively the other classes and their `*1` equivalents too) are *incomparable* constraints. This has always been an annoyance of working with the `*1` classes, and now it would rear it's head one last time as an pesky migration. Instead, we give the `*1` classes superclasses, like so: ```haskell (forall a. Eq a => Eq (f a)) => Eq1 f ``` along with some laws that canonicity is preserved, like: ```haskell liftEq (==) = (==) ``` and likewise for `*2` classes: ```haskell (forall a. Eq a => Eq1 (f a)) => Eq2 f ``` and laws: ```haskell liftEq2 (==) = liftEq1 ``` The `*1` classes also have default methods using the `*2` classes where possible. What this means, as explained in the docs, is that `*1` classes really are generations of the regular classes, indicating that the methods can be split into a canonical lifting combined with a canonical inner, with the super class "witnessing" the laws[1] in a fashion. Circling back to the pragmatics of migrating, note that the superclass means evidence for the old `Sum`, `Product`, and `Compose` instances is (more than) sufficient, so breakage is less likely --- as long no instances are "missing", existing polymorphic code will continue to work. Breakage can occur when a datatype implements the `*1` class but not the corresponding regular class, but this is almost certainly an oversight. For example, containers made that mistake for `Tree` and `Ord`, which I fixed in https://github.com/haskell/containers/pull/761, but fixing the issue by adding `Ord1` was extremely *un*controversial. `Generically1` was also missing `Eq`, `Ord`, `Read,` and `Show` instances. It is unlikely this would have been caught without implementing this change. ----- [1]: In fact, someday, when the laws are part of the language and not only documentation, we might be able to drop the superclass field of the dictionary by using the laws to recover the superclass in an instance-agnostic manner, e.g. with a *non*-overloaded function with type: ```haskell DictEq1 f -> DictEq a -> DictEq (f a) ``` But I don't wish to get into optomizations now, just demonstrate the close relationship between the law and the superclass. Bump haddock submodule because of test output changing. - - - - - 6a8c6b5e by Tom Ellis at 2022-09-20T13:12:27-04:00 Add notes to ghc-prim Haddocks that users should not import it - - - - - ee9d0f5c by matoro at 2022-09-20T13:13:06-04:00 docs: clarify that LLVM codegen is not available in unregisterised mode The current docs are misleading and suggest that it is possible to use LLVM codegen from an unregisterised build. This is not the case; attempting to pass `-fllvm` to an unregisterised build warns: ``` when making flags consistent: warning: Target platform uses unregisterised ABI, so compiling via C ``` and uses the C codegen anyway. - - - - - 854224ed by Nicolas Trangez at 2022-09-20T20:14:29-04:00 rts: remove copy-paste error from `cabal.rts.in` This was, likely accidentally, introduced in 4bf542bf1c. See: 4bf542bf1cdf2fa468457fc0af21333478293476 - - - - - c8ae3add by Matthew Pickering at 2022-09-20T20:15:04-04:00 hadrian: Add extra_dependencies edges for all different ways The hack to add extra dependencies needed by DeriveLift extension missed the cases for profiles and dynamic ways. For the profiled way this leads to errors like: ``` GHC error in desugarer lookup in Data.IntSet.Internal: Failed to load interface for ‘Language.Haskell.TH.Lib.Internal’ Perhaps you haven't installed the profiling libraries for package ‘template-haskell’? Use -v (or `:set -v` in ghci) to see a list of the files searched for. ghc: panic! (the 'impossible' happened) GHC version 9.5.20220916: initDs ``` Therefore the fix is to add these extra edges in. Fixes #22197 - - - - - a971657d by Mon Aaraj at 2022-09-21T06:41:24+03:00 users-guide: fix incorrect ghcappdata folder for unix and windows - - - - - 06ccad0d by sheaf at 2022-09-21T08:28:49-04:00 Don't use isUnliftedType in isTagged The function GHC.Stg.InferTags.Rewrite.isTagged can be given the Id of a join point, which might be representation polymorphic. This would cause the call to isUnliftedType to crash. It's better to use typeLevity_maybe instead. Fixes #22212 - - - - - c0ba775d by Teo Camarasu at 2022-09-21T14:30:37-04:00 Add fragmentation statistic to GHC.Stats Implements #21537 - - - - - 2463df2f by Torsten Schmits at 2022-09-21T14:31:24-04:00 Rename Solo[constructor] to MkSolo Part of proposal 475 (https://github.com/ghc-proposals/ghc-proposals/blob/master/proposals/0475-tu...) Moves all tuples to GHC.Tuple.Prim Updates ghc-prim version (and bumps bounds in dependents) updates haddock submodule updates deepseq submodule updates text submodule - - - - - 9034fada by Matthew Pickering at 2022-09-22T09:25:29-04:00 Update filepath to filepath-1.4.100.0 Updates submodule * Always rely on vendored filepath * filepath must be built as stage0 dependency because it uses template-haskell. Towards #22098 - - - - - 615e2278 by Krzysztof Gogolewski at 2022-09-22T09:26:05-04:00 Minor refactor around Outputable * Replace 'text . show' and 'ppr' with 'int'. * Remove Outputable.hs-boot, no longer needed * Use pprWithCommas * Factor out instructions in AArch64 codegen - - - - - aeafdba5 by Sebastian Graf at 2022-09-27T15:14:54+02:00 Demand: Clear distinction between Call SubDmd and eval Dmd (#21717) In #21717 we saw a reportedly unsound strictness signature due to an unsound definition of plusSubDmd on Calls. This patch contains a description and the fix to the unsoundness as outlined in `Note [Call SubDemand vs. evaluation Demand]`. This fix means we also get rid of the special handling of `-fpedantic-bottoms` in eta-reduction. Thanks to less strict and actually sound strictness results, we will no longer eta-reduce the problematic cases in the first place, even without `-fpedantic-bottoms`. So fixing the unsoundness also makes our eta-reduction code simpler with less hacks to explain. But there is another, more unfortunate side-effect: We *unfix* #21085, but fortunately we have a new fix ready: See `Note [mkCall and plusSubDmd]`. There's another change: I decided to make `Note [SubDemand denotes at least one evaluation]` a lot simpler by using `plusSubDmd` (instead of `lubPlusSubDmd`) even if both argument demands are lazy. That leads to less precise results, but in turn rids ourselves from the need for 4 different `OpMode`s and the complication of `Note [Manual specialisation of lub*Dmd/plus*Dmd]`. The result is simpler code that is in line with the paper draft on Demand Analysis. I left the abandoned idea in `Note [Unrealised opportunity in plusDmd]` for posterity. The fallout in terms of regressions is negligible, as the testsuite and NoFib shows. ``` Program Allocs Instrs -------------------------------------------------------------------------------- hidden +0.2% -0.2% linear -0.0% -0.7% -------------------------------------------------------------------------------- Min -0.0% -0.7% Max +0.2% +0.0% Geometric Mean +0.0% -0.0% ``` Fixes #21717. - - - - - 9b1595c8 by Ross Paterson at 2022-09-27T14:12:01-04:00 implement proposal 106 (Define Kinds Without Promotion) (fixes #6024) includes corresponding changes to haddock submodule - - - - - c2d73cb4 by Andreas Klebinger at 2022-09-28T15:07:30-04:00 Apply some tricks to speed up core lint. Below are the noteworthy changes and if given their impact on compiler allocations for a type heavy module: * Use the oneShot trick on LintM * Use a unboxed tuple for the result of LintM: ~6% reduction * Avoid a thunk for the result of typeKind in lintType: ~5% reduction * lint_app: Don't allocate the error msg in the hot code path: ~4% reduction * lint_app: Eagerly force the in scope set: ~4% * nonDetCmpType: Try to short cut using reallyUnsafePtrEquality#: ~2% * lintM: Use a unboxed maybe for the `a` result: ~12% * lint_app: make go_app tail recursive to avoid allocating the go function as heap closure: ~7% * expandSynTyCon_maybe: Use a specialized data type For a less type heavy module like nofib/spectral/simple compiled with -O -dcore-lint allocations went down by ~24% and compile time by ~9%. ------------------------- Metric Decrease: T1969 ------------------------- - - - - - b74b6191 by sheaf at 2022-09-28T15:08:10-04:00 matchLocalInst: do domination analysis When multiple Given quantified constraints match a Wanted, and there is a quantified constraint that dominates all others, we now pick it to solve the Wanted. See Note [Use only the best matching quantified constraint]. For example: [G] d1: forall a b. ( Eq a, Num b, C a b ) => D a b [G] d2: forall a . C a Int => D a Int [W] {w}: D a Int When solving the Wanted, we find that both Givens match, but we pick the second, because it has a weaker precondition, C a Int, compared to (Eq a, Num Int, C a Int). We thus say that d2 dominates d1; see Note [When does a quantified instance dominate another?]. This domination test is done purely in terms of superclass expansion, in the function GHC.Tc.Solver.Interact.impliedBySCs. We don't attempt to do a full round of constraint solving; this simple check suffices for now. Fixes #22216 and #22223 - - - - - 2a53ac18 by Simon Peyton Jones at 2022-09-28T17:49:09-04:00 Improve aggressive specialisation This patch fixes #21286, by not unboxing dictionaries in worker/wrapper (ever). The main payload is tiny: * In `GHC.Core.Opt.DmdAnal.finaliseArgBoxities`, do not unbox dictionaries in `get_dmd`. See Note [Do not unbox class dictionaries] in that module * I also found that imported wrappers were being fruitlessly specialised, so I fixed that too, in canSpecImport. See Note [Specialising imported functions] point (2). In doing due diligence in the testsuite I fixed a number of other things: * Improve Note [Specialising unfoldings] in GHC.Core.Unfold.Make, and Note [Inline specialisations] in GHC.Core.Opt.Specialise, and remove duplication between the two. The new Note describes how we specialise functions with an INLINABLE pragma. And simplify the defn of `spec_unf` in `GHC.Core.Opt.Specialise.specCalls`. * Improve Note [Worker/wrapper for INLINABLE functions] in GHC.Core.Opt.WorkWrap. And (critially) make an actual change which is to propagate the user-written pragma from the original function to the wrapper; see `mkStrWrapperInlinePrag`. * Write new Note [Specialising imported functions] in GHC.Core.Opt.Specialise All this has a big effect on some compile times. This is compiler/perf, showing only changes over 1%: Metrics: compile_time/bytes allocated ------------------------------------- LargeRecord(normal) -50.2% GOOD ManyConstructors(normal) +1.0% MultiLayerModulesTH_OneShot(normal) +2.6% PmSeriesG(normal) -1.1% T10547(normal) -1.2% T11195(normal) -1.2% T11276(normal) -1.0% T11303b(normal) -1.6% T11545(normal) -1.4% T11822(normal) -1.3% T12150(optasm) -1.0% T12234(optasm) -1.2% T13056(optasm) -9.3% GOOD T13253(normal) -3.8% GOOD T15164(normal) -3.6% GOOD T16190(normal) -2.1% T16577(normal) -2.8% GOOD T16875(normal) -1.6% T17836(normal) +2.2% T17977b(normal) -1.0% T18223(normal) -33.3% GOOD T18282(normal) -3.4% GOOD T18304(normal) -1.4% T18698a(normal) -1.4% GOOD T18698b(normal) -1.3% GOOD T19695(normal) -2.5% GOOD T5837(normal) -2.3% T9630(normal) -33.0% GOOD WWRec(normal) -9.7% GOOD hard_hole_fits(normal) -2.1% GOOD hie002(normal) +1.6% geo. mean -2.2% minimum -50.2% maximum +2.6% I diligently investigated some of the big drops. * Caused by not doing w/w for dictionaries: T13056, T15164, WWRec, T18223 * Caused by not fruitlessly specialising wrappers LargeRecord, T9630 For runtimes, here is perf/should+_run: Metrics: runtime/bytes allocated -------------------------------- T12990(normal) -3.8% T5205(normal) -1.3% T9203(normal) -10.7% GOOD haddock.Cabal(normal) +0.1% haddock.base(normal) -1.1% haddock.compiler(normal) -0.3% lazy-bs-alloc(normal) -0.2% ------------------------------------------ geo. mean -0.3% minimum -10.7% maximum +0.1% I did not investigate exactly what happens in T9203. Nofib is a wash: +-------------------------------++--+-----------+-----------+ | || | tsv (rel) | std. err. | +===============================++==+===========+===========+ | real/anna || | -0.13% | 0.0% | | real/fem || | +0.13% | 0.0% | | real/fulsom || | -0.16% | 0.0% | | real/lift || | -1.55% | 0.0% | | real/reptile || | -0.11% | 0.0% | | real/smallpt || | +0.51% | 0.0% | | spectral/constraints || | +0.20% | 0.0% | | spectral/dom-lt || | +1.80% | 0.0% | | spectral/expert || | +0.33% | 0.0% | +===============================++==+===========+===========+ | geom mean || | | | +-------------------------------++--+-----------+-----------+ I spent quite some time investigating dom-lt, but it's pretty complicated. See my note on !7847. Conclusion: it's just a delicate inlining interaction, and we have plenty of those. Metric Decrease: LargeRecord T13056 T13253 T15164 T16577 T18223 T18282 T18698a T18698b T19695 T9630 WWRec hard_hole_fits T9203 - - - - - addeefc0 by Simon Peyton Jones at 2022-09-28T17:49:09-04:00 Refactor UnfoldingSource and IfaceUnfolding I finally got tired of the way that IfaceUnfolding reflected a previous structure of unfoldings, not the current one. This MR refactors UnfoldingSource and IfaceUnfolding to be simpler and more consistent. It's largely just a refactor, but in UnfoldingSource (which moves to GHC.Types.Basic, since it is now used in IfaceSyn too), I distinguish between /user-specified/ and /system-generated/ stable unfoldings. data UnfoldingSource = VanillaSrc | StableUserSrc -- From a user-specified pragma | StableSystemSrc -- From a system-generated unfolding | CompulsorySrc This has a minor effect in CSE (see the use of isisStableUserUnfolding in GHC.Core.Opt.CSE), which I tripped over when working on specialisation, but it seems like a Good Thing to know anyway. - - - - - 7be6f9a4 by Simon Peyton Jones at 2022-09-28T17:49:09-04:00 INLINE/INLINEABLE pragmas in Foreign.Marshal.Array Foreign.Marshal.Array contains many small functions, all of which are overloaded, and which are critical for performance. Yet none of them had pragmas, so it was a fluke whether or not they got inlined. This patch makes them all either INLINE (small ones) or INLINEABLE and hence specialisable (larger ones). See Note [Specialising array operations] in that module. - - - - - b0c89dfa by Jade Lovelace at 2022-09-28T17:49:49-04:00 Export OnOff from GHC.Driver.Session I was working on fixing an issue where HLS was trying to pass its DynFlags to HLint, but didn't pass any of the disabled language extensions, which HLint would then assume are on because of their default values. Currently it's not possible to get any of the "No" flags because the `DynFlags.extensions` field can't really be used since it is [OnOff Extension] and OnOff is not exported. So let's export it. - - - - - 2f050687 by Andrew Lelechenko at 2022-09-28T17:50:28-04:00 Avoid Data.List.group; prefer Data.List.NonEmpty.group This allows to avoid further partiality, e. g., map head . group is replaced by map NE.head . NE.group, and there are less panic calls. - - - - - bc0020fa by M Farkas-Dyck at 2022-09-28T22:51:59-04:00 Clean up `findWiredInUnit`. In particular, avoid `head`. - - - - - 6a2eec98 by Andrew Lelechenko at 2022-09-28T22:52:38-04:00 Eliminate headFS, use unconsFS instead A small step towards #22185 to avoid partial functions + safe implementation of `startsWithUnderscore`. - - - - - 5a535172 by Sebastian Graf at 2022-09-29T17:04:20+02:00 Demand: Format Call SubDemands `Cn(sd)` as `C(n,sd)` (#22231) Justification in #22231. Short form: In a demand like `1C1(C1(L))` it was too easy to confuse which `1` belongs to which `C`. Now that should be more obvious. Fixes #22231 - - - - - ea0083bf by Bryan Richter at 2022-09-29T15:48:38-04:00 Revert "ci: enable parallel compression for xz" Combined wxth XZ_OPT=9, this blew the memory capacity of CI runners. This reverts commit a5f9c35f5831ef5108e87813a96eac62803852ab. - - - - - f5e8f493 by Sebastian Graf at 2022-09-30T18:42:13+02:00 Boxity: Don't update Boxity unless worker/wrapper follows (#21754) A small refactoring in our Core Opt pipeline and some new functions for transfering argument boxities from one signature to another to facilitate `Note [Don't change boxity without worker/wrapper]`. Fixes #21754. - - - - - 4baf7b1c by M Farkas-Dyck at 2022-09-30T17:45:47-04:00 Scrub various partiality involving empty lists. Avoids some uses of `head` and `tail`, and some panics when an argument is null. - - - - - 95ead839 by Alexis King at 2022-10-01T00:37:43-04:00 Fix a bug in continuation capture across multiple stack chunks - - - - - 22096652 by Andrew Lelechenko at 2022-10-01T00:38:22-04:00 Enforce internal invariant of OrdList and fix bugs in viewCons / viewSnoc `viewCons` used to ignore `Many` constructor completely, returning `VNothing`. `viewSnoc` violated internal invariant of `Many` being a non-empty list. - - - - - 48ab9ca5 by Nicolas Trangez at 2022-10-04T20:34:10-04:00 chore: extend `.editorconfig` for C files - - - - - b8df5c72 by Brandon Chinn at 2022-10-04T20:34:46-04:00 Fix docs for pattern synonyms - - - - - 463ffe02 by Oleg Grenrus at 2022-10-04T20:35:24-04:00 Use sameByteArray# in sameByteArray - - - - - fbe1e86e by Pierre Le Marre at 2022-10-05T15:58:43+02:00 Minor fixes following Unicode 15.0.0 update - Fix changelog for Unicode 15.0.0 - Fix the checksums of the downloaded Unicode files, in base's tool: "ucd2haskell". - - - - - 8a31d02e by Cheng Shao at 2022-10-05T20:40:41-04:00 rts: don't enforce aligned((8)) on 32-bit targets We simply need to align to the word size for pointer tagging to work. On 32-bit targets, aligned((8)) is wasteful. - - - - - 532de368 by Ryan Scott at 2022-10-06T07:45:46-04:00 Export symbolSing, SSymbol, and friends (CLC#85) This implements this Core Libraries Proposal: https://github.com/haskell/core-libraries-committee/issues/85 In particular, it: 1. Exposes the `symbolSing` method of `KnownSymbol`, 2. Exports the abstract `SSymbol` type used in `symbolSing`, and 3. Defines an API for interacting with `SSymbol`. This also makes corresponding changes for `natSing`/`KnownNat`/`SNat` and `charSing`/`KnownChar`/`SChar`. This fixes #15183 and addresses part (2) of #21568. - - - - - d83a92e6 by sheaf at 2022-10-07T07:36:30-04:00 Remove mention of make from README.md - - - - - 945e8e49 by Andrew Lelechenko at 2022-10-10T17:13:31-04:00 Add a newline before since pragma in Data.Array.Byte - - - - - 44fcdb04 by Vladislav Zavialov at 2022-10-10T17:14:06-04:00 Parser/PostProcess: rename failOp* functions There are three functions named failOp* in the parser: failOpNotEnabledImportQualifiedPost failOpImportQualifiedTwice failOpFewArgs Only the last one has anything to do with operators. The other two were named this way either by mistake or due to a misunderstanding of what "op" stands for. This small patch corrects this. - - - - - 96d32ff2 by Simon Peyton Jones at 2022-10-10T22:30:21+01:00 Make rewrite rules "win" over inlining If a rewrite rule and a rewrite rule compete in the simplifier, this patch makes sure that the rewrite rule "win". That is, in general a bit fragile, but it's a huge help when making specialisation work reliably, as #21851 and #22097 showed. The change is fairly straightforwad, and documented in Note [Rewrite rules and inlining] in GHC.Core.Opt.Simplify.Iteration. Compile-times change, up and down a bit -- in some cases because we get better specialisation. But the payoff (more reliable specialisation) is large. Metrics: compile_time/bytes allocated ----------------------------------------------- T10421(normal) +3.7% BAD T10421a(normal) +5.5% T13253(normal) +1.3% T14052(ghci) +1.8% T15304(normal) -1.4% T16577(normal) +3.1% BAD T17516(normal) +2.3% T17836(normal) -1.9% T18223(normal) -1.8% T8095(normal) -1.3% T9961(normal) +2.5% BAD geo. mean +0.0% minimum -1.9% maximum +5.5% Nofib results are (bytes allocated) +-------------------------------++----------+ | ||tsv (rel) | +===============================++==========+ | imaginary/paraffins || +0.27% | | imaginary/rfib || -0.04% | | real/anna || +0.02% | | real/fem || -0.04% | | real/fluid || +1.68% | | real/gamteb || -0.34% | | real/gg || +1.54% | | real/hidden || -0.01% | | real/hpg || -0.03% | | real/infer || -0.03% | | real/prolog || +0.02% | | real/veritas || -0.47% | | shootout/fannkuch-redux || -0.03% | | shootout/k-nucleotide || -0.02% | | shootout/n-body || -0.06% | | shootout/spectral-norm || -0.01% | | spectral/cryptarithm2 || +1.25% | | spectral/fibheaps || +18.33% | | spectral/last-piece || -0.34% | +===============================++==========+ | geom mean || +0.17% | There are extensive notes in !8897 about the regressions. Briefly * fibheaps: there was a very delicately balanced inlining that tipped over the wrong way after this change. * cryptarithm2 and paraffins are caused by #22274, which is a separate issue really. (I.e. the right fix is *not* to make inlining "win" over rules.) So I'm accepting these changes Metric Increase: T10421 T16577 T9961 - - - - - ed4b5885 by Joachim Breitner at 2022-10-10T23:16:11-04:00 Utils.JSON: do not escapeJsonString in ToJson String instance as `escapeJsonString` is used in `renderJSON`, so the `JSString` constructor is meant to carry the unescaped string. - - - - - fbb88740 by Matthew Pickering at 2022-10-11T12:48:45-04:00 Tidy implicit binds We want to put implicit binds into fat interface files, so the easiest thing to do seems to be to treat them uniformly with other binders. - - - - - e058b138 by Matthew Pickering at 2022-10-11T12:48:45-04:00 Interface Files with Core Definitions This commit adds three new flags * -fwrite-if-simplified-core: Writes the whole core program into an interface file * -fbyte-code-and-object-code: Generate both byte code and object code when compiling a file * -fprefer-byte-code: Prefer to use byte-code if it's available when running TH splices. The goal for including the core bindings in an interface file is to be able to restart the compiler pipeline at the point just after simplification and before code generation. Once compilation is restarted then code can be created for the byte code backend. This can significantly speed up start-times for projects in GHCi. HLS already implements its own version of these extended interface files for this reason. Preferring to use byte-code means that we can avoid some potentially expensive code generation steps (see #21700) * Producing object code is much slower than producing bytecode, and normally you need to compile with `-dynamic-too` to produce code in the static and dynamic way, the dynamic way just for Template Haskell execution when using a dynamically linked compiler. * Linking many large object files, which happens once per splice, can be quite expensive compared to linking bytecode. And you can get GHC to compile the necessary byte code so `-fprefer-byte-code` has access to it by using `-fbyte-code-and-object-code`. Fixes #21067 - - - - - 9789ea8e by Matthew Pickering at 2022-10-11T12:48:45-04:00 Teach -fno-code about -fprefer-byte-code This patch teachs the code generation logic of -fno-code about -fprefer-byte-code, so that if we need to generate code for a module which prefers byte code, then we generate byte code rather than object code. We keep track separately which modules need object code and which byte code and then enable the relevant code generation for each. Typically the option will be enabled globally so one of these sets should be empty and we will just turn on byte code or object code generation. We also fix the bug where we would generate code for a module which enables Template Haskell despite the fact it was unecessary. Fixes #22016 - - - - - caced757 by Simon Peyton Jones at 2022-10-11T12:49:21-04:00 Don't keep exit join points so much We were religiously keeping exit join points throughout, which had some bad effects (#21148, #22084). This MR does two things: * Arranges that exit join points are inhibited from inlining only in /one/ Simplifier pass (right after Exitification). See Note [Be selective about not-inlining exit join points] in GHC.Core.Opt.Exitify It's not a big deal, but it shaves 0.1% off compile times. * Inline used-once non-recursive join points very aggressively Given join j x = rhs in joinrec k y = ....j x.... where this is the only occurrence of `j`, we want to inline `j`. (Unless sm_keep_exits is on.) See Note [Inline used-once non-recursive join points] in GHC.Core.Opt.Simplify.Utils This is just a tidy-up really. It doesn't change allocation, but getting rid of a binding is always good. Very effect on nofib -- some up and down. - - - - - 284cf387 by Simon Peyton Jones at 2022-10-11T12:49:21-04:00 Make SpecConstr bale out less often When doing performance debugging on #22084 / !8901, I found that the algorithm in SpecConstr.decreaseSpecCount was so aggressive that if there were /more/ specialisations available for an outer function, that could more or less kill off specialisation for an /inner/ function. (An example was in nofib/spectral/fibheaps.) This patch makes it a bit more aggressive, by dividing by 2, rather than by the number of outer specialisations. This makes the program bigger, temporarily: T19695(normal) ghc/alloc +11.3% BAD because we get more specialisation. But lots of other programs compile a bit faster and the geometric mean in perf/compiler is 0.0%. Metric Increase: T19695 - - - - - 66af1399 by Cheng Shao at 2022-10-11T12:49:59-04:00 CmmToC: emit explicit tail calls when the C compiler supports it Clang 13+ supports annotating a return statement using the musttail attribute, which guarantees that it lowers to a tail call if compilation succeeds. This patch takes advantage of that feature for the unregisterised code generator. The configure script tests availability of the musttail attribute, if it's available, the Cmm tail calls will become C tail calls that avoids the mini interpreter trampoline overhead. Nothing is affected if the musttail attribute is not supported. Clang documentation: https://clang.llvm.org/docs/AttributeReference.html#musttail - - - - - 7f0decd5 by Matthew Pickering at 2022-10-11T12:50:40-04:00 Don't include BufPos in interface files Ticket #22162 pointed out that the build directory was leaking into the ABI hash of a module because the BufPos depended on the location of the build tree. BufPos is only used in GHC.Parser.PostProcess.Haddock, and the information doesn't need to be propagated outside the context of a module. Fixes #22162 - - - - - dce9f320 by Cheng Shao at 2022-10-11T12:51:19-04:00 CLabel: fix isInfoTableLabel isInfoTableLabel does not take Cmm info table into account. This patch is required for data section layout of wasm32 NCG to work. - - - - - da679f2e by Andrew Lelechenko at 2022-10-11T18:02:59-04:00 Extend documentation for Data.List, mostly wrt infinite lists - - - - - 9c099387 by jwaldmann at 2022-10-11T18:02:59-04:00 Expand comment for Data.List.permutations - - - - - d3863cb7 by Andrew Lelechenko at 2022-10-11T18:03:37-04:00 ByteArray# is unlifted, not unboxed - - - - - f6260e8b by Ben Gamari at 2022-10-11T23:45:10-04:00 rts: Add missing declaration of stg_noDuplicate - - - - - 69ccec2c by Ben Gamari at 2022-10-11T23:45:10-04:00 base: Move CString, CStringLen to GHC.Foreign - - - - - f6e8feb4 by Ben Gamari at 2022-10-11T23:45:10-04:00 base: Move IPE helpers to GHC.InfoProv - - - - - 866c736e by Ben Gamari at 2022-10-11T23:45:10-04:00 rts: Refactor IPE tracing support - - - - - 6b0d2022 by Ben Gamari at 2022-10-11T23:45:10-04:00 Refactor IPE initialization Here we refactor the representation of info table provenance information in object code to significantly reduce its size and link-time impact. Specifically, we deduplicate strings and represent them as 32-bit offsets into a common string table. In addition, we rework the registration logic to eliminate allocation from the registration path, which is run from a static initializer where things like allocation are technically undefined behavior (although it did previously seem to work). For similar reasons we eliminate lock usage from registration path, instead relying on atomic CAS. Closes #22077. - - - - - 9b572d54 by Ben Gamari at 2022-10-11T23:45:10-04:00 Separate IPE source file from span The source file name can very often be shared across many IPE entries whereas the source coordinates are generally unique. Separate the two to exploit sharing of the former. - - - - - 27978ceb by Krzysztof Gogolewski at 2022-10-11T23:45:46-04:00 Make Cmm Lint messages use dump style Lint errors indicate an internal error in GHC, so it makes sense to use it instead of the user style. This is consistent with Core Lint and STG Lint: https://gitlab.haskell.org/ghc/ghc/-/blob/22096652/compiler/GHC/Core/Lint.hs... https://gitlab.haskell.org/ghc/ghc/-/blob/22096652/compiler/GHC/Stg/Lint.hs#... Fixes #22218. - - - - - 64a390d9 by Bryan Richter at 2022-10-12T09:52:51+03:00 Mark T7919 as fragile On x86_64-linux, T7919 timed out ~30 times during July 2022. And again ~30 times in September 2022. - - - - - 481467a5 by Ben Gamari at 2022-10-12T08:08:37-04:00 rts: Don't hint inlining of appendToRunQueue These hints have resulted in compile-time warnings due to failed inlinings for quite some time. Moreover, it's quite unlikely that inlining them is all that beneficial given that they are rather sizeable functions. Resolves #22280. - - - - - 81915089 by Curran McConnell at 2022-10-12T16:32:26-04:00 remove name shadowing - - - - - 626652f7 by Tamar Christina at 2022-10-12T16:33:13-04:00 winio: do not re-translate input when handle is uncooked - - - - - 5172789a by Charles Taylor at 2022-10-12T16:33:57-04:00 Unrestricted OverloadedLabels (#11671) Implements GHC proposal: https://github.com/ghc-proposals/ghc-proposals/blob/master/proposals/0170-un... - - - - - ce293908 by Andreas Klebinger at 2022-10-13T05:58:19-04:00 Add a perf test for the generics code pattern from #21839. This code showed a strong shift between compile time (got worse) and run time (got a lot better) recently which is perfectly acceptable. However it wasn't clear why the compile time regression was happening initially so I'm adding this test to make it easier to track such changes in the future. - - - - - 78ab7afe by Ben Gamari at 2022-10-13T05:58:56-04:00 rts/linker: Consolidate initializer/finalizer handling Here we extend our treatment of initializer/finalizer priorities to include ELF and in so doing refactor things to share the implementation with PEi386. As well, I fix a subtle misconception of the ordering behavior for `.ctors`. Fixes #21847. - - - - - 44692713 by Ben Gamari at 2022-10-13T05:58:56-04:00 rts/linker: Add support for .fini sections - - - - - beebf546 by Simon Hengel at 2022-10-13T05:59:37-04:00 Update phases.rst (the name of the original source file is $1, not $2) - - - - - eda6c05e by Finley McIlwaine at 2022-10-13T06:00:17-04:00 Clearer error msg for newtype GADTs with defaulted kind When a newtype introduces GADT eq_specs due to a defaulted RuntimeRep, we detect this and print the error message with explicit kinds. This also refactors newtype type checking to use the new diagnostic infra. Fixes #21447 - - - - - 43ab435a by Pierre Le Marre at 2022-10-14T07:45:43-04:00 Add standard Unicode case predicates isUpperCase and isLowerCase. These predicates use the standard Unicode case properties and are more intuitive than isUpper and isLower. Approved by CLC in https://github.com/haskell/core-libraries-committee/issues/90#issuecomment-1.... Fixes #14589 - - - - - aec5a443 by Andrew Lelechenko at 2022-10-14T07:46:21-04:00 Add type signatures in where-clause of Data.List.permutations The type of interleave' is very much revealing, otherwise it's extremely tough to decipher. - - - - - ee0deb80 by Ben Gamari at 2022-10-14T18:29:20-04:00 rts: Use pthread_setname_np correctly on Darwin As noted in #22206, pthread_setname_np on Darwin only supports setting the name of the calling thread. Consequently we must introduce a trampoline which first sets the thread name before entering the thread entrypoint. - - - - - 8eff62a4 by Ben Gamari at 2022-10-14T18:29:57-04:00 testsuite: Add test for #22282 This will complement mpickering's more general port of foundation's numerical testsuite, providing a test for the specific case found in #22282. - - - - - 62a55001 by Ben Gamari at 2022-10-14T18:29:57-04:00 ncg/aarch64: Fix sub-word sign extension yet again In adc7f108141a973b6dcb02a7836eed65d61230e8 we fixed a number of issues to do with sign extension in the AArch64 NCG found by ghc/test-primops>. However, this patch made a critical error, assuming that getSomeReg would allocate a fresh register for the result of its evaluation. However, this is not the case as `getSomeReg (CmmReg r) == r`. Consequently, any mutation of the register returned by `getSomeReg` may have unwanted side-effects on other expressions also mentioning `r`. In the fix listed above, this manifested as the registers containing the operands of binary arithmetic operations being incorrectly sign-extended. This resulted in #22282. Sadly, the rather simple structure of the tests generated by `test-primops` meant that this particular case was not exercised. Even more surprisingly, none of our testsuite caught this case. Here we fix this by ensuring that intermediate sign extension is performed in a fresh register. Fixes #22282. - - - - - 54e41b16 by Teo Camarasu at 2022-10-15T18:09:24+01:00 rts: ensure we are below maxHeapSize after returning megablocks When the heap is heavily block fragmented the live byte size might be low while the memory usage is high. We want to ensure that heap overflow triggers in these cases. We do so by checking that we can return enough megablocks to under maxHeapSize at the end of GC. - - - - - 29bb90db by Teo Camarasu at 2022-10-15T18:09:24+01:00 rts: trigger a major collection if megablock usage exceeds maxHeapSize When the heap is suffering from block fragmentation, live bytes might be low while megablock usage is high. If megablock usage exceeds maxHeapSize, we want to trigger a major GC to try to recover some memory otherwise we will die from a heapOverflow at the end of the GC. Fixes #21927 - - - - - 4a4641ca by Teo Camarasu at 2022-10-15T18:11:29+01:00 Add realease note for #21927 - - - - - c1e5719a by Sebastian Graf at 2022-10-17T11:58:46-04:00 DmdAnal: Look through unfoldings of DataCon wrappers (#22241) Previously, the demand signature we computed upfront for a DataCon wrapper lacked boxity information and was much less precise than the demand transformer for the DataCon worker. In this patch we adopt the solution to look through unfoldings of DataCon wrappers during Demand Analysis, but still attach a demand signature for other passes such as the Simplifier. See `Note [DmdAnal for DataCon wrappers]` for more details. Fixes #22241. - - - - - 8c72411d by Gergő Érdi at 2022-10-17T19:20:04-04:00 Add `Enum (Down a)` instance that swaps `succ` and `pred` See https://github.com/haskell/core-libraries-committee/issues/51 for discussion. The key points driving the implementation are the following two ideas: * For the `Int` type, `comparing (complement @Int)` behaves exactly as an order-swapping `compare @Int`. * `enumFrom @(Down a)` can be implemented in terms of `enumFromThen @a`, if only the corner case of starting at the very end is handled specially - - - - - d80ad2f4 by Alan Zimmerman at 2022-10-17T19:20:40-04:00 Update the check-exact infrastructure to match ghc-exactprint GHC tests the exact print annotations using the contents of utils/check-exact. The same functionality is provided via https://github.com/alanz/ghc-exactprint The latter was updated to ensure it works with all of the files on hackage when 9.2 was released, as well as updated to ensure users of the library could work properly (apply-refact, retrie, etc). This commit brings the changes from ghc-exactprint into GHC/utils/check-exact, adapting for the changes to master. Once it lands, it will form the basis for the 9.4 version of ghc-exactprint. See also discussion around this process at #21355 - - - - - 08ab5419 by Andreas Klebinger at 2022-10-17T19:21:15-04:00 Avoid allocating intermediate lists for non recursive bindings. We do so by having an explicit folding function that doesn't need to allocate intermediate lists first. Fixes #22196 - - - - - ff6275ef by Andreas Klebinger at 2022-10-17T19:21:52-04:00 Testsuite: Add a new tables_next_to_code predicate. And use it to avoid T21710a failing on non-tntc archs. Fixes #22169 - - - - - abb82f38 by Eric Lindblad at 2022-10-17T19:22:33-04:00 example rewrite - - - - - 39beb801 by Eric Lindblad at 2022-10-17T19:22:33-04:00 remove redirect - - - - - 0d9fb651 by Eric Lindblad at 2022-10-17T19:22:33-04:00 use heredoc - - - - - 0fa2d185 by Matthew Pickering at 2022-10-17T19:23:10-04:00 testsuite: Fix typo when setting llvm_ways Since 2014 llvm_ways has been set to [] so none of the tests which use only_ways(llvm_ways) have worked as expected. Hopefully the tests still pass with this typo fix! - - - - - ced664a2 by Krzysztof Gogolewski at 2022-10-17T19:23:10-04:00 Fix T15155l not getting -fllvm - - - - - 0ac60423 by Andreas Klebinger at 2022-10-18T03:34:47-04:00 Fix GHCis interaction with tag inference. I had assumed that wrappers were not inlined in interactive mode. Meaning we would always execute the compiled wrapper which properly takes care of upholding the strict field invariant. This turned out to be wrong. So instead we now run tag inference even when we generate bytecode. In that case only for correctness not performance reasons although it will be still beneficial for runtime in some cases. I further fixed a bug where GHCi didn't tag nullary constructors properly when used as arguments. Which caused segfaults when calling into compiled functions which expect the strict field invariant to be upheld. Fixes #22042 and #21083 ------------------------- Metric Increase: T4801 Metric Decrease: T13035 ------------------------- - - - - - 9ecd1ac0 by M Farkas-Dyck at 2022-10-18T03:35:38-04:00 Make `Functor` a superclass of `TrieMap`, which lets us derive the `map` functions. - - - - - f60244d7 by Ben Gamari at 2022-10-18T03:36:15-04:00 configure: Bump minimum bootstrap GHC version Fixes #22245 - - - - - ba4bd4a4 by Matthew Pickering at 2022-10-18T03:36:55-04:00 Build System: Remove out-of-date comment about make build system Both make and hadrian interleave compilation of modules of different modules and don't respect the package boundaries. Therefore I just remove this comment which points out this "difference". Fixes #22253 - - - - - e1bbd368 by Matthew Pickering at 2022-10-18T16:15:49+02:00 Allow configuration of error message printing This MR implements the idea of #21731 that the printing of a diagnostic method should be configurable at the printing time. The interface of the `Diagnostic` class is modified from: ``` class Diagnostic a where diagnosticMessage :: a -> DecoratedSDoc diagnosticReason :: a -> DiagnosticReason diagnosticHints :: a -> [GhcHint] ``` to ``` class Diagnostic a where type DiagnosticOpts a defaultDiagnosticOpts :: DiagnosticOpts a diagnosticMessage :: DiagnosticOpts a -> a -> DecoratedSDoc diagnosticReason :: a -> DiagnosticReason diagnosticHints :: a -> [GhcHint] ``` and so each `Diagnostic` can implement their own configuration record which can then be supplied by a client in order to dictate how to print out the error message. At the moment this only allows us to implement #21722 nicely but in future it is more natural to separate the configuration of how much information we put into an error message and how much we decide to print out of it. Updates Haddock submodule - - - - - 99dc3e3d by Matthew Pickering at 2022-10-18T16:15:53+02:00 Add -fsuppress-error-contexts to disable printing error contexts in errors In many development environments, the source span is the primary means of seeing what an error message relates to, and the In the expression: and In an equation for: clauses are not particularly relevant. However, they can grow to be quite long, which can make the message itself both feel overwhelming and interact badly with limited-space areas. It's simple to implement this flag so we might as well do it and give the user control about how they see their messages. Fixes #21722 - - - - - 5b3a992f by Dai at 2022-10-19T10:45:45-04:00 Add VecSlot for unboxed sums of SIMD vectors This patch adds the missing `VecRep` case to `primRepSlot` function and all the necessary machinery to carry this new `VecSlot` through code generation. This allows programs involving unboxed sums of SIMD vectors to be written and compiled. Fixes #22187 - - - - - 6d7d9181 by sheaf at 2022-10-19T10:45:45-04:00 Remove SIMD conversions This patch makes it so that packing/unpacking SIMD vectors always uses the right sized types, e.g. unpacking a Word16X4# will give a tuple of Word16#s. As a result, we can get rid of the conversion instructions that were previously required. Fixes #22296 - - - - - 3be48877 by sheaf at 2022-10-19T10:45:45-04:00 Cmm Lint: relax SIMD register assignment check As noted in #22297, SIMD vector registers can be used to store different kinds of values, e.g. xmm1 can be used both to store integer and floating point values. The Cmm type system doesn't properly account for this, so we weaken the Cmm register assignment lint check to only compare widths when comparing a vector type with its allocated vector register. - - - - - f7b7a312 by sheaf at 2022-10-19T10:45:45-04:00 Disable some SIMD tests on non-X86 architectures - - - - - 83638dce by M Farkas-Dyck at 2022-10-19T10:46:29-04:00 Scrub various partiality involving lists (again). Lets us avoid some use of `head` and `tail`, and some panics. - - - - - c3732c62 by M Farkas-Dyck at 2022-10-19T10:47:13-04:00 Enforce invariant of `ListBag` constructor. - - - - - 488d3631 by Andrew Lelechenko at 2022-10-19T10:47:52-04:00 More precise types for fields of OverlappingInstances and UnsafeOverlap in TcSolverReportMsg It's clear from asserts in `GHC.Tc.Errors` that `overlappingInstances_matches` and `unsafeOverlapped` are supposed to be non-empty, and `unsafeOverlap_matches` contains a single instance, but these invariants are immediately lost afterwards and not encoded in types. This patch enforces the invariants by pattern matching and makes types more precise, avoiding asserts and partial functions such as `head`. - - - - - 607ce263 by sheaf at 2022-10-19T10:47:52-04:00 Rename unsafeOverlap_matches -> unsafeOverlap_match in UnsafeOverlap - - - - - 1fab9598 by Matthew Pickering at 2022-10-19T10:48:29-04:00 Add SpliceTypes test for hie files This test checks that typed splices and quotes get the right type information when used in hiefiles. See #21619 - - - - - a8b52786 by Jan Hrček at 2022-10-19T10:49:09-04:00 Small language fixes in 'Using GHC' - - - - - 1dab1167 by Gergő Érdi at 2022-10-19T10:49:51-04:00 Fix typo in `Opt_WriteIfSimplifiedCore`'s name - - - - - b17cfc9c by sheaf at 2022-10-19T10:50:37-04:00 TyEq:N assertion: only for saturated applications The assertion that checked TyEq:N in canEqCanLHSFinish incorrectly triggered in the case of an unsaturated newtype TyCon heading the RHS, even though we can't unwrap such an application. Now, we only trigger an assertion failure in case of a saturated application of a newtype TyCon. Fixes #22310 - - - - - ff6f2228 by M Farkas-Dyck at 2022-10-20T16:15:51-04:00 CoreToStg: purge `DynFlags`. - - - - - 1ebd521f by Matthew Pickering at 2022-10-20T16:16:27-04:00 ci: Make fat014 test robust For some reason I implemented this as a makefile test rather than a ghci_script test. Hopefully making it a ghci_script test makes it more robust. Fixes #22313 - - - - - 8cd6f435 by Curran McConnell at 2022-10-21T02:58:01-04:00 remove a no-warn directive from GHC.Cmm.ContFlowOpt This patch is motivated by the desire to remove the {-# OPTIONS_GHC -fno-warn-incomplete-patterns #-} directive at the top of GHC.Cmm.ContFlowOpt. (Based on the text in this coding standards doc, I understand it's a goal of the project to remove such directives.) I chose this task because I'm a new contributor to GHC, and it seemed like a good way to get acquainted with the patching process. In order to address the warning that arose when I removed the no-warn directive, I added a case to removeUnreachableBlocksProc to handle the CmmData constructor. Clearly, since this partial function has not been erroring out in the wild, its inputs are always in practice wrapped by the CmmProc constructor. Therefore the CmmData case is handled by a precise panic (which is an improvement over the partial pattern match from before). - - - - - a2af7c4c by Nicolas Trangez at 2022-10-21T02:58:39-04:00 build: get rid of `HAVE_TIME_H` As advertized by `autoreconf`:

All current systems provide time.h; it need not be checked for.

Hence, remove the check for it in `configure.ac` and remove conditional inclusion of the header in `HAVE_TIME_H` blocks where applicable. The `time.h` header was being included in various source files without a `HAVE_TIME_H` guard already anyway. - - - - - 25cdc630 by Nicolas Trangez at 2022-10-21T02:58:39-04:00 rts: remove use of `TIME_WITH_SYS_TIME` `autoreconf` will insert an `m4_warning` when the obsolescent `AC_HEADER_TIME` macro is used:

Update your code to rely only on HAVE_SYS_TIME_H, then remove this warning and the obsolete code below it. All current systems provide time.h; it need not be checked for. Not all systems provide sys/time.h, but those that do, all allow you to include it and time.h simultaneously.

Presence of `sys/time.h` was already checked in an earlier `AC_CHECK_HEADERS` invocation, so `AC_HEADER_TIME` can be dropped and guards relying on `TIME_WITH_SYS_TIME` can be reworked to (unconditionally) include `time.h` and include `sys/time.h` based on `HAVE_SYS_TIME_H`. Note the documentation of `AC_HEADER_TIME` in (at least) Autoconf 2.67 says

This macro is obsolescent, as current systems can include both files when they exist. New programs need not use this macro.

- - - - - 1fe7921c by Eric Lindblad at 2022-10-21T02:59:21-04:00 runhaskell - - - - - e3b3986e by David Feuer at 2022-10-21T03:00:00-04:00 Document how to quote certain names with spaces Quoting a name for Template Haskell is a bit tricky if the second character of that name is a single quote. The User's Guide falsely claimed that it was impossible. Document how to do it. Fixes #22236 - - - - - 0eba81e8 by Krzysztof Gogolewski at 2022-10-21T03:00:00-04:00 Fix syntax - - - - - a4dbd102 by Ben Gamari at 2022-10-21T09:11:12-04:00 Fix manifest filename when writing Windows .rc files As noted in #12971, we previously used `show` which resulted in inappropriate escaping of non-ASCII characters. - - - - - 30f0d9a9 by Ben Gamari at 2022-10-21T09:11:12-04:00 Write response files in UTF-8 on Windows This reverts the workaround introduced in f63c8ef33ec9666688163abe4ccf2d6c0428a7e7, which taught our response file logic to write response files with the `latin1` encoding to workaround `gcc`'s lacking Unicode support. This is now no longer necessary (and in fact actively unhelpful) since we rather use Clang. - - - - - b8304648 by Matthew Farkas-Dyck at 2022-10-21T09:11:56-04:00 Scrub some partiality in `GHC.Core.Opt.Simplify.Utils`. - - - - - 09ec7de2 by Teo Camarasu at 2022-10-21T13:23:07-04:00 template-haskell: Improve documentation of strictness annotation types Before it was undocumentated that DecidedLazy can be returned by reifyConStrictness for strict fields. This can happen when a field has an unlifted type or its the single field of a newtype constructor. Fixes #21380 - - - - - 88172069 by M Farkas-Dyck at 2022-10-21T13:23:51-04:00 Delete `eqExpr`, since GHC 9.4 has been released. - - - - - 86e6549e by Ömer Sinan Ağacan at 2022-10-22T07:41:30-04:00 Introduce a standard thunk for allocating strings Currently for a top-level closure in the form hey = unpackCString# x we generate code like this: Main.hey_entry() // [R1] { info_tbls: [(c2T4, label: Main.hey_info rep: HeapRep static { Thunk } srt: Nothing)] stack_info: arg_space: 8 updfr_space: Just 8 } {offset c2T4: // global _rqm::P64 = R1; if ((Sp + 8) - 24 < SpLim) (likely: False) goto c2T5; else goto c2T6; c2T5: // global R1 = _rqm::P64; call (stg_gc_enter_1)(R1) args: 8, res: 0, upd: 8; c2T6: // global (_c2T1::I64) = call "ccall" arg hints: [PtrHint, PtrHint] result hints: [PtrHint] newCAF(BaseReg, _rqm::P64); if (_c2T1::I64 == 0) goto c2T3; else goto c2T2; c2T3: // global call (I64[_rqm::P64])() args: 8, res: 0, upd: 8; c2T2: // global I64[Sp - 16] = stg_bh_upd_frame_info; I64[Sp - 8] = _c2T1::I64; R2 = hey1_r2Gg_bytes; Sp = Sp - 16; call GHC.CString.unpackCString#_info(R2) args: 24, res: 0, upd: 24; } } This code is generated for every string literal. Only difference between top-level closures like this is the argument for the bytes of the string (hey1_r2Gg_bytes in the code above). With this patch we introduce a standard thunk in the RTS, called stg_MK_STRING_info, that does what `unpackCString# x` does, except it gets the bytes address from the payload. Using this, for the closure above, we generate this: Main.hey_closure" { Main.hey_closure: const stg_MK_STRING_info; const 0; // padding for indirectee const 0; // static link const 0; // saved info const hey1_r1Gg_bytes; // the payload } This is much smaller in code. Metric Decrease: T10421 T11195 T12150 T12425 T16577 T18282 T18698a T18698b Co-Authored By: Ben Gamari <ben@well-typed.com> - - - - - 1937016b by Andreas Klebinger at 2022-10-22T07:42:06-04:00 hadrian: Improve error for wrong key/value errors. - - - - - 11fe42d8 by Vladislav Zavialov at 2022-10-23T00:11:50+03:00 Class layout info (#19623) Updates the haddock submodule. - - - - - f0a90c11 by Sven Tennie at 2022-10-24T00:12:51-04:00 Pin used way for test cloneMyStack (#21977) cloneMyStack checks the order of closures on the cloned stack. This may change for different ways. Thus we limit this test to one way (normal). - - - - - 0614e74d by Aaron Allen at 2022-10-24T17:11:21+02:00 Convert Diagnostics in GHC.Tc.Gen.Splice (#20116) Replaces uses of `TcRnUnknownMessage` in `GHC.Tc.Gen.Splice` with structured diagnostics. closes #20116 - - - - - 8d2dbe2d by Andreas Klebinger at 2022-10-24T15:59:41-04:00 Improve stg lint for unboxed sums. It now properly lints cases where sums end up distributed over multiple args after unarise. Fixes #22026. - - - - - 41406da5 by Simon Peyton Jones at 2022-10-25T18:07:03-04:00 Fix binder-swap bug This patch fixes #21229 properly, by avoiding doing a binder-swap on dictionary Ids. This is pretty subtle, and explained in Note [Care with binder-swap on dictionaries]. Test is already in simplCore/should_run/T21229 This allows us to restore a feature to the specialiser that we had to revert: see Note [Specialising polymorphic dictionaries]. (This is done in a separate patch.) I also modularised things, using a new function scrutBinderSwap_maybe in all the places where we are (effectively) doing a binder-swap, notably * Simplify.Iteration.addAltUnfoldings * SpecConstr.extendCaseBndrs In Simplify.Iteration.addAltUnfoldings I also eliminated a guard Many <- idMult case_bndr because we concluded, in #22123, that it was doing no good. - - - - - 5a997e16 by Simon Peyton Jones at 2022-10-25T18:07:03-04:00 Make the specialiser handle polymorphic specialisation Ticket #13873 unexpectedly showed that a SPECIALISE pragma made a program run (a lot) slower, because less specialisation took place overall. It turned out that the specialiser was missing opportunities because of quantified type variables. It was quite easy to fix. The story is given in Note [Specialising polymorphic dictionaries] Two other minor fixes in the specialiser * There is no benefit in specialising data constructor /wrappers/. (They can appear overloaded because they are given a dictionary to store in the constructor.) Small guard in canSpecImport. * There was a buglet in the UnspecArg case of specHeader, in the case where there is a dead binder. We need a LitRubbish filler for the specUnfolding stuff. I expanded Note [Drop dead args from specialisations] to explain. There is a 4% increase in compile time for T15164, because we generate more specialised code. This seems OK. Metric Increase: T15164 - - - - - 7f203d00 by Sylvain Henry at 2022-10-25T18:07:43-04:00 Numeric exceptions: replace FFI calls with primops ghc-bignum needs a way to raise numerical exceptions defined in base package. At the time we used FFI calls into primops defined in the RTS. These FFI calls had to be wrapped into hacky bottoming functions because "foreign import prim" syntax doesn't support giving a bottoming demand to the foreign call (cf #16929). These hacky wrapper functions trip up the JavaScript backend (#21078) because they are polymorphic in their return type. This commit replaces them with primops very similar to raise# but raising predefined exceptions. - - - - - 0988a23d by Sylvain Henry at 2022-10-25T18:08:24-04:00 Enable popcount rewrite rule when cross-compiling The comment applies only when host's word size < target's word size. So we can relax the guard. - - - - - a2f53ac8 by Sylvain Henry at 2022-10-25T18:09:05-04:00 Add GHC.SysTools.Cpp module Move doCpp out of the driver to be able to use it in the upcoming JS backend. - - - - - 1fd7f201 by Ben Gamari at 2022-10-25T18:09:42-04:00 llvm-targets: Add datalayouts for big-endian AArch64 targets Fixes #22311. Thanks to @zeldin for the patch. - - - - - f5a486eb by Krzysztof Gogolewski at 2022-10-25T18:10:19-04:00 Cleanup String/FastString conversions Remove unused mkPtrString and isUnderscoreFS. We no longer use mkPtrString since 1d03d8bef96. Remove unnecessary conversions between FastString and String and back. - - - - - f7bfb40c by Ryan Scott at 2022-10-26T00:01:24-04:00 Broaden the in-scope sets for liftEnvSubst and composeTCvSubst This patch fixes two distinct (but closely related) buglets that were uncovered in #22235: * `liftEnvSubst` used an empty in-scope set, which was not wide enough to cover the variables in the range of the substitution. This patch fixes this by populating the in-scope set from the free variables in the range of the substitution. * `composeTCvSubst` applied the first substitution argument to the range of the second substitution argument, but the first substitution's in-scope set was not wide enough to cover the range of the second substutition. We similarly fix this issue in this patch by widening the first substitution's in-scope set before applying it. Fixes #22235. - - - - - 0270cc54 by Vladislav Zavialov at 2022-10-26T00:02:01-04:00 Introduce TcRnWithHsDocContext (#22346) Before this patch, GHC used withHsDocContext to attach an HsDocContext to an error message: addErr $ mkTcRnUnknownMessage $ mkPlainError noHints (withHsDocContext ctxt msg) The problem with this approach is that it only works with TcRnUnknownMessage. But could we attach an HsDocContext to a structured error message in a generic way? This patch solves the problem by introducing a new constructor to TcRnMessage: data TcRnMessage where ... TcRnWithHsDocContext :: !HsDocContext -> !TcRnMessage -> TcRnMessage ... - - - - - 9ab31f42 by Sylvain Henry at 2022-10-26T09:32:20+02:00 Testsuite: more precise test options Necessary for newer cross-compiling backends (JS, Wasm) that don't support TH yet. - - - - - f60a1a62 by Vladislav Zavialov at 2022-10-26T12:17:14-04:00 Use TcRnVDQInTermType in noNestedForallsContextsErr (#20115) When faced with VDQ in the type of a term, GHC generates the following error message: Illegal visible, dependent quantification in the type of a term (GHC does not yet support this) Prior to this patch, there were two ways this message could have been generated and represented: 1. with the dedicated constructor TcRnVDQInTermType (see check_type in GHC.Tc.Validity) 2. with the transitional constructor TcRnUnknownMessage (see noNestedForallsContextsErr in GHC.Rename.Utils) Not only this led to duplication of code generating the final SDoc, it also made it tricky to track the origin of the error message. This patch fixes the problem by using TcRnVDQInTermType exclusively. - - - - - 223e159d by Owen Shepherd at 2022-10-27T13:54:33-04:00 Remove source location information from interface files This change aims to minimize source location information leaking into interface files, which makes ABI hashes dependent on the build location. The `Binary (Located a)` instance has been removed completely. It seems that the HIE interface still needs the ability to serialize SrcSpans, but by wrapping the instances, it should be a lot more difficult to inadvertently add source location information. - - - - - 22e3deb9 by Simon Peyton Jones at 2022-10-27T13:55:37-04:00 Add missing dict binds to specialiser I had forgotten to add the auxiliary dict bindings to the /unfolding/ of a specialised function. This caused #22358, which reports failures when compiling Hackage packages fixed-vector indexed-traversable Regression test T22357 is snarfed from indexed-traversable - - - - - a8ed36f9 by Evan Relf at 2022-10-27T13:56:36-04:00 Fix broken link to `async` package - - - - - 750846cd by Zubin Duggal at 2022-10-28T00:49:22-04:00 Pass correct package db when testing stage1. It used to pick the db for stage-2 which obviously didn't work. - - - - - ad612f55 by Krzysztof Gogolewski at 2022-10-28T00:50:00-04:00 Minor SDoc-related cleanup * Rename pprCLabel to pprCLabelStyle, and use the name pprCLabel for a function using CStyle (analogous to pprAsmLabel) * Move LabelStyle to the CLabel module, it no longer needs to be in Outputable. * Move calls to 'text' right next to literals, to make sure the text/str rule is triggered. * Remove FastString/String roundtrip in Tc.Deriv.Generate * Introduce showSDocForUser', which abstracts over a pattern in GHCi.UI - - - - - c2872f3f by Bryan Richter at 2022-10-28T11:36:34+03:00 CI: Don't run lint-submods on nightly Fixes #22325 - - - - - 270037fa by Hécate Moonlight at 2022-10-28T19:46:12-04:00 Start the deprecation process for GHC.Pack - - - - - d45d8cb3 by M Farkas-Dyck at 2022-11-01T12:47:21-04:00 Drop a kludge for binutils<2.17, which is now over 10 years old. - - - - - 8ee8b418 by Nicolas Trangez at 2022-11-01T12:47:58-04:00 rts: `name` argument of `createOSThread` can be `const` Since we don't intend to ever change the incoming string, declare this to be true. Also, in the POSIX implementation, the argument is no longer `STG_UNUSED` (since ee0deb8054da2a597fc5624469b4c44fd769ada2) in any code path. See: https://gitlab.haskell.org/ghc/ghc/-/commit/ee0deb8054da2a597fc5624469b4c44f... - - - - - 13b5f102 by Nicolas Trangez at 2022-11-01T12:47:58-04:00 rts: fix lifetime of `start_thread`s `name` value Since, unlike the code in ee0deb8054da2^, usage of the `name` value passed to `createOSThread` now outlives said function's lifetime, and could hence be released by the caller by the time the new thread runs `start_thread`, it needs to be copied. See: https://gitlab.haskell.org/ghc/ghc/-/commit/ee0deb8054da2a597fc5624469b4c44f... See: https://gitlab.haskell.org/ghc/ghc/-/merge_requests/9066 - - - - - edd175c9 by Nicolas Trangez at 2022-11-01T12:47:58-04:00 rts: fix OS thread naming in ticker Since ee0deb805, the use of `pthread_setname_np` on Darwin was fixed when invoking `createOSThread`. However, the 'ticker' has some thread-creation code which doesn't rely on `createOSThread`, yet also uses `pthread_setname_np`. This patch enforces all thread creation to go through a single function, which uses the (correct) thread-naming code introduced in ee0deb805. See: https://gitlab.haskell.org/ghc/ghc/-/commit/ee0deb8054da2a597fc5624469b4c44f... See: https://gitlab.haskell.org/ghc/ghc/-/issues/22206 See: https://gitlab.haskell.org/ghc/ghc/-/merge_requests/9066 - - - - - b7a00113 by Krzysztof Gogolewski at 2022-11-01T12:48:35-04:00 Typo: rename -fwrite-if-simplfied-core to -fwrite-if-simplified-core - - - - - 30e625e6 by Vladislav Zavialov at 2022-11-01T12:49:10-04:00 ThToHs: fix overzealous parenthesization Before this patch, when converting from TH.Exp to LHsExpr GhcPs, the compiler inserted more parentheses than required: ((f a) (b + c)) d This was happening because the LHS of the function application was parenthesized as if it was the RHS. Now we use funPrec and appPrec appropriately and produce sensibly parenthesized expressions: f a (b + c) d I also took the opportunity to remove the special case for LamE, which was not special at all and simply duplicated code. - - - - - 0560821f by Simon Peyton Jones at 2022-11-01T12:49:47-04:00 Add accurate skolem info when quantifying Ticket #22379 revealed that skolemiseQuantifiedTyVar was dropping the passed-in skol_info on the floor when it encountered a SkolemTv. Bad! Several TyCons thereby share a single SkolemInfo on their binders, which lead to bogus error reports. - - - - - 38d19668 by Fendor at 2022-11-01T12:50:25-04:00 Expose UnitEnvGraphKey for user-code - - - - - 77e24902 by Simon Peyton Jones at 2022-11-01T12:51:00-04:00 Shrink test case for #22357 Ryan Scott offered a cut-down repro case (60 lines instead of more than 700 lines) - - - - - 4521f649 by Simon Peyton Jones at 2022-11-01T12:51:00-04:00 Add two tests for #17366 - - - - - 6b400d26 by Nicolas Trangez at 2022-11-02T12:06:48-04:00 rts: introduce (and use) `STG_NORETURN` Instead of sprinkling the codebase with `GNU(C3)_ATTRIBUTE(__noreturn__)`, add a `STG_NORETURN` macro (for, basically, the same thing) similar to `STG_UNUSED` and others, and update the code to use this macro where applicable. - - - - - f9638654 by Nicolas Trangez at 2022-11-02T12:06:48-04:00 rts: consistently use `STG_UNUSED` - - - - - 81a58433 by Nicolas Trangez at 2022-11-02T12:06:48-04:00 rts: introduce (and use) `STG_USED` Similar to `STG_UNUSED`, have a specific macro for `__attribute__(used)`. - - - - - 41e1f748 by Nicolas Trangez at 2022-11-02T12:06:48-04:00 rts: introduce (and use) `STG_MALLOC` Instead of using `GNUC3_ATTRIBUTE(__malloc__)`, provide a `STG_MALLOC` macro definition and use it instead. - - - - - 3a9a8bde by Nicolas Trangez at 2022-11-02T12:06:48-04:00 rts: use `STG_UNUSED` - - - - - 9ab999de by Nicolas Trangez at 2022-11-02T12:06:48-04:00 rts: specify deallocator of allocating functions This patch adds a new `STG_MALLOC1` macro (and its counterpart `STG_MALLOC2` for completeness) which allows to specify the deallocation function to be used with allocations of allocating functions, and applies it to `stg*allocBytes`. It also fixes a case where `free` was used to free up an `stgMallocBytes` allocation, found by the above change. See: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-mal... See: https://gitlab.haskell.org/ghc/ghc/-/issues/22381 - - - - - 81c0c7c9 by Nicolas Trangez at 2022-11-02T12:06:48-04:00 rts: use `alloc_size` attribute This patch adds the `STG_ALLOC_SIZE1` and `STG_ALLOC_SIZE2` macros which allow to set the `alloc_size` attribute on functions, when available. See: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-all... See: https://gitlab.haskell.org/ghc/ghc/-/issues/22381 - - - - - 99a1d896 by Nicolas Trangez at 2022-11-02T12:06:48-04:00 rts: add and use `STG_RETURNS_NONNULL` See: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-ret... See: https://gitlab.haskell.org/ghc/ghc/-/issues/22381 - - - - - c235b399 by Nicolas Trangez at 2022-11-02T12:06:48-04:00 rts: tag `stgStrndup` as `STG_MALLOC` See: https://gitlab.haskell.org/ghc/ghc/-/issues/22381 - - - - - ed81b448 by Oleg Grenrus at 2022-11-02T12:07:27-04:00 Move Symbol implementation note out of public haddock - - - - - 284fd39c by Ben Gamari at 2022-11-03T01:58:54-04:00 gen-dll: Drop it Currently it is only used by the make build system, which is soon to be retired, and it has not built since 41cf758b. We may need to reintroduce it when dynamic-linking support is introduced on Windows, but we will cross that bridge once we get there. Fixes #21753. - - - - - 24f4f54f by Matthew Pickering at 2022-11-03T01:59:30-04:00 Port foundation numeric tests to GHC testsuite This commit ports the numeric tests which found a regression in GHC-9.4. https://github.com/haskell-foundation/foundation/issues/571 Included in the commit is a simple random number generator and simplified QuickCheck implementation. In future these could be factored out of this standalone file and reused as a general purpose library which could be used for other QuickCheck style tests in the testsuite. See #22282 - - - - - d51bf7bd by M Farkas-Dyck at 2022-11-03T02:00:13-04:00 git: ignore HIE files. Cleans up git status if one sets -fwrite-ide-info in hadrian/ghci. - - - - - a9fc15b1 by Matthew Pickering at 2022-11-03T02:00:49-04:00 Clarify status of bindings in WholeCoreBindings Gergo points out that these bindings are tidied, rather than prepd as the variable claims. Therefore we update the name of the variable to reflect reality and add a comment to the data type to try to erase any future confusion. Fixes #22307 - - - - - 634da448 by Andrew Lelechenko at 2022-11-03T21:25:02+00:00 Fix haddocks for GHC.IORef - - - - - 31125154 by Andreas Klebinger at 2022-11-03T23:08:09-04:00 Export pprTrace and friends from GHC.Prelude. Introduces GHC.Prelude.Basic which can be used in modules which are a dependency of the ppr code. - - - - - bdc8cbb3 by Bryan Richter at 2022-11-04T10:27:37+02:00 CI: Allow hadrian-ghc-in-ghci to run in nightlies Since lint-submods doesn't run in nightlies, hadrian-ghc-in-ghci needs to mark it as "optional" so it can run if the job doesn't exist. Fixes #22396. - - - - - 3c0e3793 by Krzysztof Gogolewski at 2022-11-05T00:29:57-04:00 Minor refactor around FastStrings Pass FastStrings to functions directly, to make sure the rule for fsLit "literal" fires. Remove SDoc indirection in GHCi.UI.Tags and GHC.Unit.Module.Graph. - - - - - e41b2f55 by Matthew Pickering at 2022-11-05T14:18:10+00:00 Bump unix submodule to 2.8.0.0 Also bumps process and ghc-boot bounds on unix. For hadrian, when cross-compiling, we add -Wwarn=unused-imports -Wwarn=unused-top-binds to validation flavour. Further fixes in unix and/or hsc2hs is needed to make it completely free of warnings; for the time being, this change is needed to unblock other cross-compilation related work. - - - - - 42938a58 by Matthew Pickering at 2022-11-05T14:18:10+00:00 Bump Win32 submodule to 2.13.4.0 Fixes #22098 - - - - - e7372bc5 by Cheng Shao at 2022-11-06T13:15:22+00:00 Bump ci-images revision ci-images has recently been updated, including changes needed for wasm32-wasi CI. - - - - - 88cb9492 by Cheng Shao at 2022-11-06T13:15:22+00:00 Bump gmp-tarballs submodule Includes a fix for wasm support, doesn't impact other targets. - - - - - 69427ce9 by Cheng Shao at 2022-11-06T13:15:22+00:00 Bump haskeline submodule Includes a fix for wasm support, doesn't impact other targets. - - - - - 5fe11fe6 by Carter Schonwald at 2022-11-07T13:22:14-05:00 bump llvm upper bound - - - - - 68f49874 by M Farkas-Dyck at 2022-11-08T12:53:55-05:00 Define `Infinite` list and use where appropriate. Also add perf test for infinite list fusion. In particular, in `GHC.Core`, often we deal with infinite lists of roles. Also in a few locations we deal with infinite lists of names. Thanks to simonpj for helping to write the Note [Fusion for `Infinite` lists]. - - - - - ce726cd2 by Ross Paterson at 2022-11-08T12:54:34-05:00 Fix TypeData issues (fixes #22315 and #22332) There were two bugs here: 1. Treating type-level constructors as PromotedDataCon doesn't always work, in particular because constructors promoted via DataKinds are called both T and 'T. (Tests T22332a, T22332b, T22315a, T22315b) Fix: guard these cases with isDataKindsPromotedDataCon. 2. Type-level constructors were sent to the code generator, producing things like constructor wrappers. (Tests T22332a, T22332b) Fix: test for them in isDataTyCon. Other changes: * changed the marking of "type data" DataCon's as suggested by SPJ. * added a test TDGADT for a type-level GADT. * comment tweaks * change tcIfaceTyCon to ignore IfaceTyConInfo, so that IfaceTyConInfo is used only for pretty printing, not for typechecking. (SPJ) - - - - - 132f8908 by Jade Lovelace at 2022-11-08T12:55:18-05:00 Clarify msum/asum documentation - - - - - bb5888c5 by Jade Lovelace at 2022-11-08T12:55:18-05:00 Add example for (<$) - - - - - 080fffa1 by Jade Lovelace at 2022-11-08T12:55:18-05:00 Document what Alternative/MonadPlus instances actually do - - - - - 92ccb8de by Giles Anderson at 2022-11-09T09:27:52-05:00 Use TcRnDiagnostic in GHC.Tc.TyCl.Instance (#20117) The following `TcRnDiagnostic` messages have been introduced: TcRnWarnUnsatisfiedMinimalDefinition TcRnMisplacedInstSig TcRnBadBootFamInstDeclErr TcRnIllegalFamilyInstance TcRnAssocInClassErr TcRnBadFamInstDecl TcRnNotOpenFamily - - - - - 90c5abd4 by Hécate Moonlight at 2022-11-09T09:28:30-05:00 GHCi tags generation phase 2 see #19884 - - - - - abd2d803 by Simon Peyton Jones at 2022-11-10T17:37:15+00:00 Try doing case-of-case in InitialPhase - - - - - 4373 changed files: - − .appveyor.sh - .editorconfig - .gitignore - .gitlab-ci.yml - .gitlab/ci.sh - .gitlab/darwin/toolchain.nix - .gitlab/gen_ci.hs - .gitlab/jobs.yaml - + .gitlab/upload_ghc_libs.py - CODEOWNERS - − MAKEHELP.md - − Makefile - README.md - − appveyor.yml - − bindisttest/ghc.mk - boot - compiler/.hlint.yaml - compiler/CodeGen.Platform.h - compiler/GHC.hs - compiler/GHC/Builtin/Names.hs - compiler/GHC/Builtin/Names/TH.hs - compiler/GHC/Builtin/PrimOps.hs - compiler/GHC/Builtin/PrimOps/Ids.hs - compiler/GHC/Builtin/Types.hs - compiler/GHC/Builtin/Types.hs-boot - compiler/GHC/Builtin/Types/Prim.hs - compiler/GHC/Builtin/Uniques.hs - compiler/GHC/Builtin/primops.txt.pp - compiler/GHC/ByteCode/Asm.hs - compiler/GHC/ByteCode/Instr.hs - compiler/GHC/ByteCode/Linker.hs - compiler/GHC/Cmm.hs - compiler/GHC/Cmm/BlockId.hs - compiler/GHC/Cmm/CLabel.hs - compiler/GHC/Cmm/CLabel.hs-boot - compiler/GHC/Cmm/CallConv.hs - compiler/GHC/Cmm/CommonBlockElim.hs - compiler/GHC/Cmm/ContFlowOpt.hs - compiler/GHC/Cmm/Dataflow.hs - compiler/GHC/Cmm/Dataflow/Graph.hs - compiler/GHC/Cmm/Dataflow/Label.hs - compiler/GHC/Cmm/DebugBlock.hs - + compiler/GHC/Cmm/Dominators.hs - compiler/GHC/Cmm/Expr.hs - compiler/GHC/Cmm/Info/Build.hs - compiler/GHC/Cmm/Lint.hs - compiler/GHC/Cmm/Liveness.hs - compiler/GHC/Cmm/MachOp.hs - compiler/GHC/Cmm/Node.hs - compiler/GHC/Cmm/Parser.y - + compiler/GHC/Cmm/Parser/Config.hs - compiler/GHC/Cmm/Parser/Monad.hs - compiler/GHC/Cmm/Pipeline.hs - − compiler/GHC/Cmm/Ppr.hs - − compiler/GHC/Cmm/Ppr/Decl.hs - − compiler/GHC/Cmm/Ppr/Expr.hs - compiler/GHC/Cmm/ProcPoint.hs - + compiler/GHC/Cmm/Reg.hs - compiler/GHC/Cmm/Sink.hs - compiler/GHC/Cmm/Switch.hs - compiler/GHC/Cmm/Type.hs - compiler/GHC/Cmm/Utils.hs - compiler/GHC/CmmToAsm.hs - compiler/GHC/CmmToAsm/AArch64.hs - compiler/GHC/CmmToAsm/AArch64/CodeGen.hs - compiler/GHC/CmmToAsm/AArch64/Instr.hs - compiler/GHC/CmmToAsm/AArch64/Ppr.hs - compiler/GHC/CmmToAsm/AArch64/Regs.hs - compiler/GHC/CmmToAsm/BlockLayout.hs - compiler/GHC/CmmToAsm/CFG.hs - compiler/GHC/CmmToAsm/CFG/Dominators.hs - compiler/GHC/CmmToAsm/CPrim.hs - compiler/GHC/CmmToAsm/Dwarf.hs - compiler/GHC/CmmToAsm/Dwarf/Types.hs - compiler/GHC/CmmToAsm/Monad.hs - compiler/GHC/CmmToAsm/PIC.hs - compiler/GHC/CmmToAsm/PPC/CodeGen.hs - compiler/GHC/CmmToAsm/PPC/Instr.hs - compiler/GHC/CmmToAsm/PPC/Ppr.hs - compiler/GHC/CmmToAsm/PPC/Regs.hs - compiler/GHC/CmmToAsm/Ppr.hs - compiler/GHC/CmmToAsm/Reg/Graph.hs - compiler/GHC/CmmToAsm/Reg/Graph/Base.hs - compiler/GHC/CmmToAsm/Reg/Graph/TrivColorable.hs - compiler/GHC/CmmToAsm/Reg/Linear.hs - compiler/GHC/CmmToAsm/Reg/Linear/AArch64.hs - compiler/GHC/CmmToAsm/Reg/Liveness.hs - compiler/GHC/CmmToAsm/X86/CodeGen.hs - compiler/GHC/CmmToAsm/X86/Instr.hs - compiler/GHC/CmmToAsm/X86/Ppr.hs - compiler/GHC/CmmToAsm/X86/Regs.hs - compiler/GHC/CmmToC.hs - compiler/GHC/CmmToLlvm.hs - compiler/GHC/CmmToLlvm/Base.hs - compiler/GHC/CmmToLlvm/CodeGen.hs - compiler/GHC/CmmToLlvm/Config.hs - compiler/GHC/CmmToLlvm/Data.hs - compiler/GHC/CmmToLlvm/Ppr.hs - compiler/GHC/Core.hs - + compiler/GHC/Core.hs-boot - compiler/GHC/Core/Coercion.hs - compiler/GHC/Core/Coercion/Axiom.hs - 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testsuite/tests/warnings/should_fail/CaretDiagnostics1.stderr - testsuite/tests/warnings/should_fail/CaretDiagnostics2.stderr - testsuite/tests/warnings/should_fail/Colour.stderr - testsuite/tests/warnings/should_fail/T20263.stderr - testsuite/tests/warnings/should_fail/WerrorFail.stderr - testsuite/tests/warnings/should_fail/WerrorFail2.stderr - testsuite/tests/wcompat-warnings/WCompatWarningsOn.stderr - utils/check-exact/.ghci - utils/check-exact/ExactPrint.hs - utils/check-exact/Lookup.hs - utils/check-exact/Main.hs - + utils/check-exact/Orphans.hs - utils/check-exact/Parsers.hs - utils/check-exact/Preprocess.hs - utils/check-exact/Transform.hs - utils/check-exact/Types.hs - utils/check-exact/Utils.hs - utils/check-exact/check-exact.cabal - − utils/check-exact/ghc.mk - utils/check-ppr/Main.hs - − utils/check-ppr/ghc.mk - − utils/compare_sizes/ghc.mk - utils/count-deps/Main.hs - − utils/count-deps/ghc.mk - utils/deriveConstants/Main.hs - − utils/deriveConstants/ghc.mk - − utils/gen-dll/Main.hs - − utils/gen-dll/Makefile - − utils/gen-dll/gen-dll.cabal.in - − utils/gen-dll/ghc.mk - utils/genapply/Main.hs - − utils/genapply/ghc.mk - utils/genprimopcode/Main.hs - utils/genprimopcode/genprimopcode.cabal - − utils/genprimopcode/ghc.mk - utils/ghc-cabal/ghc-cabal.cabal - − utils/ghc-cabal/ghc.mk - − utils/ghc-pkg/ghc.mk - utils/haddock - − utils/hp2ps/ghc.mk - utils/hpc/HpcCombine.hs - utils/hpc/HpcDraft.hs - utils/hpc/HpcMarkup.hs - utils/hpc/HpcOverlay.hs - utils/hpc/HpcReport.hs - utils/hpc/HpcShowTix.hs - utils/hpc/Main.hs - − utils/hpc/ghc.mk - utils/hpc/hpc-bin.cabal - utils/hsc2hs - − utils/iserv/ghc.mk - utils/llvm-targets/gen-data-layout.sh - − utils/mkdirhier/Makefile - − utils/mkdirhier/ghc.mk - − utils/mkdirhier/mkdirhier.sh - − utils/remote-iserv/ghc.mk - utils/runghc/Main.hs - − utils/runghc/ghc.mk - utils/runghc/runghc.cabal.in - − utils/testremove/ghc.mk - − utils/touchy/ghc.mk - − utils/unlit/ghc.mk - validate The diff was not included because it is too large. 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