Andreas Klebinger pushed to branch wip/andreask/spec_tyfams at Glasgow Haskell Compiler / GHC Commits: 6467d61e by Brandon Chinn at 2025-04-29T18:36:03-04:00 Fix lexing "\^\" (#25937) This broke in the refactor in !13128, where the old code parsed escape codes and collapsed string gaps at the same time, but the new code collapsed gaps first, then resolved escape codes. The new code used a naive heuristic to skip escaped backslashes, but didn't account for "\^\". - - - - - 99868a86 by Jens Petersen at 2025-04-29T18:36:44-04:00 hadrian: default selftest to disabled - - - - - aba2a4a5 by Zubin Duggal at 2025-04-30T06:35:59-04:00 get-win32-tarballs.py: List tarball files to be downloaded if we cannot find them Fixes #25929 - - - - - d99a617b by Ben Gamari at 2025-04-30T06:36:40-04:00 Move Data ModuleName instance to Language.Haskell.Syntax.Module.Name Fixes #25968. - - - - - 9995c2b7 by Serge S. Gulin at 2025-05-04T17:13:36+03:00 Support for ARM64 Windows (LLVM-enabled) (fixes #24603) 1. Add Windows AArch64 cross-compilation support via CI jobs Introduce new CI configurations for cross-compiling to Windows ARM64 using Debian12Wine, FEX, and MSYS2. Configure toolchain variables for LLVM MinGW and Wine emulation in CI pipelines. 2. Adjust compiler and RTS for AArch64 Windows compatibility Reserve register `x18` on Windows and Darwin platforms in AArch64 codegen. Handle Windows-specific relocations and data sections in AArch64 assembler. Update PEi386 linker to recognize ARM64 binaries and support exception handling. Adjust LLVM target definitions and data layouts for new architectures. Update `ghc-toolchain` and build scripts to handle `TablesNextToCode` on Windows ARM64. 3. Enhance CI scripts and stability Modify `ci.sh` to handle mingw cross-targets, fixing GHC executable paths and test execution. Use `diff -w` in tests to ignore whitespace differences, improving cross-platform consistency. 4. Refactor and clean up code Remove redundant imports in hello.hs test. Improve error messages and checks for unsupported configurations in the driver. Add `EXDEV` error code to `errno.js`. Add async/sync flags to IO logs at `base.js`. Improve POSIX compatibility for file close at `base.js`: decrease indeterminism for mixed cases of async and sync code. 5. Update dependencies: `Cabal`, `Win32`, `directory`, `process`, `haskeline`, and `unix`. submodule Co-authored-by: Cheng Shao Co-authored-by: Dmitrii Egorov Co-authored-by: Andrei Borzenkov - - - - - 50fa8165 by Javran Cheng at 2025-05-05T05:55:39-04:00 Suppress unused do-binding if discarded variable is Any or ZonkAny. Consider example (#25895):

do { forever (return ()); blah }

where `forever :: forall a b. IO a -> IO b`. Nothing constrains `b`, so it will be instantiates with `Any` or `ZonkAny`. But we certainly don't want to complain about a discarded do-binding. Fixes #25895 - - - - - e46c6b18 by Rodrigo Mesquita at 2025-05-06T09:01:57-04:00 Refactor mkTopLevImportedEnv out of mkTopLevEnv This makes the code clearer and allows the top-level import context to be fetched directly from the HomeModInfo through the API (e.g. useful for the debugger). - - - - - 0ce0d263 by Rodrigo Mesquita at 2025-05-06T09:01:57-04:00 Export sizeOccEnv from GHC.Types.Name.Occurrence Counts the number of OccNames in an OccEnv - - - - - 165f98d8 by Simon Peyton Jones at 2025-05-06T09:02:39-04:00 Fix a bad untouchability bug im simplifyInfer This patch addresses #26004. The root cause was that simplifyInfer was willing to unify variables "far out". The fix, in runTcSWithEvBinds', is to initialise the inert set given-eq level with the current level. See (TGE6) in Note [Tracking Given equalities] in GHC.Tc.Solver.InertSet Two loosely related refactors: * Refactored approximateWCX to return just the free type variables of the un-quantified constraints. That avoids duplication of work (these free vars are needed in simplifyInfer) and makes it clearer that the constraints themselves are irrelevant. * A little local refactor of TcSMode, which reduces the number of parameters to runTcSWithEvBinds - - - - - 6e67fa08 by Ben Gamari at 2025-05-08T06:21:21-04:00 llvmGen: Fix built-in variable predicate Previously the predicate to identify LLVM builtin global variables was checking for `$llvm` rather than `@llvm` as it should. - - - - - a9d0a22c by Ben Gamari at 2025-05-08T06:21:22-04:00 llvmGen: Fix linkage of built-in arrays LLVM now insists that built-in arrays use Appending linkage, not Internal. Fixes #25769. - - - - - 9c6d2b1b by sheaf at 2025-05-08T06:22:11-04:00 Use mkTrAppChecked in ds_ev_typeable This change avoids violating the invariant of mkTrApp according to which the argument should not be a fully saturated function type. This ensures we don't return false negatives for type equality involving function types. Fixes #25998 - - - - - 75cadf81 by Ryan Hendrickson at 2025-05-08T06:22:55-04:00 haddock: Preserve indentation in multiline examples Intended for use with :{ :}, but doesn't look for those characters. Any consecutive lines with birdtracks will only have initial whitespace stripped up to the column of the first line. - - - - - fee9b351 by Cheng Shao at 2025-05-08T06:23:36-04:00 ci: re-enable chrome for wasm ghci browser tests Currently only firefox is enabled for wasm ghci browser tests, for some reason testing with chrome works on my machine but gets stuck on gitlab instance runners. This patch re-enables testing with chrome by passing `--no-sandbox`, since chrome sandboxing doesn't work in containers without `--cap-add=SYS_ADMIN`. - - - - - 282df905 by Vladislav Zavialov at 2025-05-09T03:18:25-04:00 Take subordinate 'type' specifiers into account This patch fixes multiple bugs (#22581, #25983, #25984, #25991) in name resolution of subordinate import lists. Bug #22581 ---------- In subordinate import lists, the use of the `type` namespace specifier used to be ignored. For example, this import statement was incorrectly accepted: import Prelude (Bool(type True)) Now it results in an error message: <interactive>:2:17: error: [GHC-51433] In the import of ‘Prelude’: a data type called ‘Bool’ is exported, but its subordinate item ‘True’ is not in the type namespace. Bug #25983 ---------- In subordinate import lists within a `hiding` clause, non-existent items led to a poor warning message with -Wdodgy-imports. Consider: import Prelude hiding (Bool(X)) The warning message for this import statement used to misreport the cause of the problem: <interactive>:3:24: warning: [GHC-56449] [-Wdodgy-imports] In the import of ‘Prelude’: an item called ‘Bool’ is exported, but it is a type. Now the warning message is correct: <interactive>:2:24: warning: [GHC-10237] [-Wdodgy-imports] In the import of ‘Prelude’: a data type called ‘Bool’ is exported, but it does not export any constructors or record fields called ‘X’. Bug #25984 ---------- In subordinate import lists within a `hiding` clause, non-existent items resulted in the entire import declaration being discarded. For example, this program was incorrectly accepted: import Prelude hiding (Bool(True,X)) t = True Now it results in an error message: <interactive>:2:5: error: [GHC-88464] Data constructor not in scope: True Bug #25991 ---------- In subordinate import lists, it was not possible to refer to a class method if there was an associated type of the same name: module M_helper where class C a b where type a # b (#) :: a -> b -> () module M where import M_helper (C((#))) This import declaration failed with: M.hs:2:28: error: [GHC-10237] In the import of ‘M_helper’: an item called ‘C’ is exported, but it does not export any children (constructors, class methods or field names) called ‘#’. Now it is accepted. Summary ------- The changes required to fix these bugs are almost entirely confined to GHC.Rename.Names. Other than that, there is a new error constructor BadImportNonTypeSubordinates with error code [GHC-51433]. Test cases: T22581a T22581b T22581c T22581d T25983a T25983b T25983c T25983d T25983e T25983f T25983g T25984a T25984b T25991a T25991b1 T25991b2 - - - - - 51b0ce8f by Simon Peyton Jones at 2025-05-09T03:19:07-04:00 Slighty improve `dropMisleading` Fix #26105, by upgrading the (horrible, hacky) `dropMisleading` function. This fix makes things a bit better but does not cure the underlying problem. - - - - - 7b2d1e6d by Simon Peyton Jones at 2025-05-11T03:24:47-04:00 Refine `noGivenNewtypeReprEqs` to account for quantified constraints This little MR fixes #26020. We are on the edge of completeness for newtype equalities (that doesn't change) but this MR makes GHC a bit more consistent -- and fixes the bug reported. - - - - - eaa8093b by Cheng Shao at 2025-05-11T03:25:28-04:00 wasm: mark freeJSVal as INLINE This patch marks `freeJSVal` as `INLINE` for the wasm backend. I noticed that the `freeJSVal` invocations are not inlined when inspecting STG/Cmm dumps of downstream libraries that use release build of the wasm backend. The performance benefit of inlining here is very modest, but so is the cost anyway; if you are using `freeJSVal` at all then you care about every potential chance to improve performance :) - - - - - eac196df by Cheng Shao at 2025-05-11T03:25:28-04:00 wasm: add zero length fast path for fromJSString This patch adds a zero length fast path for `fromJSString`; when marshaling a zero-length `JSString` we don't need to allocate an empty `ByteArray#` at all. - - - - - 652cba7e by Peng Fan at 2025-05-14T04:24:35-04:00 Add LoongArch NCG support Not supported before. - - - - - c01f4374 by Lin Runze at 2025-05-14T04:24:35-04:00 ci: Add LoongArch64 cross-compile CI for testing - - - - - ce6cf240 by Ben Gamari at 2025-05-14T04:25:18-04:00 rts/linker: Don't fail due to RTLD_NOW In !12264 we started using the NativeObj machinery introduced some time ago for loading of shared objects. One of the side-effects of this change is shared objects are now loaded eagerly (i.e. with `RTLD_NOW`). This is needed by NativeObj to ensure full visibility of the mappings of the loaded object, which is in turn needed for safe shared object unloading. Unfortunately, this change subtly regressed, causing compilation failures in some programs. Specifically, shared objects which refer to undefined symbols (e.g. which may be usually provided by either the executable image or libraries loaded via `dlopen`) will fail to load with eager binding. This is problematic as GHC loads all package dependencies while, e.g., evaluating TemplateHaskell splices. This results in compilation failures in programs depending upon (but not using at compile-time) packages with undefined symbol references. To mitigate this NativeObj now first attempts to load an object via eager binding, reverting to lazy binding (and disabling unloading) on failure. See Note [Don't fail due to RTLD_NOW]. Fixes #25943. - - - - - 88ee8bb5 by Sylvain Henry at 2025-05-14T04:26:15-04:00 Deprecate GHC.JS.Prim.Internal.Build (#23432) Deprecated as per CLC proposal 329 (https://github.com/haskell/core-libraries-committee/issues/329) - - - - - b4ed465b by Cheng Shao at 2025-05-14T04:26:57-04:00 libffi: update to 3.4.8 Bumps libffi submodule. - - - - - a3e71296 by Matthew Pickering at 2025-05-14T04:27:38-04:00 Remove leftover trace - - - - - 2d0ecdc6 by Cheng Shao at 2025-05-14T04:28:19-04:00 Revert "ci: re-enable chrome for wasm ghci browser tests" This reverts commit fee9b351fa5a35d5778d1252789eacaaf5663ae8. Unfortunately the chrome test jobs may still timeout on certain runners (e.g. OpenCape) for unknown reasons. - - - - - 3b3a5dec by Ben Gamari at 2025-05-15T16:10:01-04:00 Don't emit unprintable characters when printing Uniques When faced with an unprintable tag we now instead print the codepoint number. Fixes #25989. (cherry picked from commit e832b1fadee66e8d6dd7b019368974756f8f8c46) - - - - - e1ef8974 by Mike Pilgrem at 2025-05-16T16:09:14-04:00 Translate iff in Haddock documentation into everyday English - - - - - c9f4604e by Andreas Klebinger at 2025-05-19T11:43:46+02:00 Specialse: Specialise on Dictionaries with Opaque types. Surfaced by #19747 I realized that sometimes we end up with types like `SomeTyFam Foo` which represent a concrete deterministic dictionary but in the specializer we can't infer this just from the Type. So when deciding if a dictionary should be specialized on we now look at the argument term *and* types. `Note [Interesting dictionary arguments]` has all the details. - - - - - 173 changed files: - .gitlab-ci.yml - .gitlab/ci.sh - .gitlab/generate-ci/gen_ci.hs - .gitlab/hello.hs - .gitlab/jobs.yaml - compiler/CodeGen.Platform.h - compiler/GHC/Builtin/Names.hs - compiler/GHC/Builtin/Types.hs - compiler/GHC/Cmm/CLabel.hs - compiler/GHC/CmmToAsm.hs - compiler/GHC/CmmToAsm/AArch64/CodeGen.hs - compiler/GHC/CmmToAsm/AArch64/Instr.hs - compiler/GHC/CmmToAsm/AArch64/Ppr.hs - compiler/GHC/CmmToAsm/Dwarf/Constants.hs - + compiler/GHC/CmmToAsm/LA64.hs - + compiler/GHC/CmmToAsm/LA64/CodeGen.hs - + compiler/GHC/CmmToAsm/LA64/Cond.hs - + compiler/GHC/CmmToAsm/LA64/Instr.hs - + compiler/GHC/CmmToAsm/LA64/Ppr.hs - + compiler/GHC/CmmToAsm/LA64/RegInfo.hs - + compiler/GHC/CmmToAsm/LA64/Regs.hs - compiler/GHC/CmmToAsm/PIC.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/Linear/FreeRegs.hs - + compiler/GHC/CmmToAsm/Reg/Linear/LA64.hs - compiler/GHC/CmmToAsm/Reg/Target.hs - compiler/GHC/CmmToLlvm/Base.hs - compiler/GHC/CmmToLlvm/Data.hs - compiler/GHC/Core/Opt/Specialise.hs - compiler/GHC/Core/Predicate.hs - compiler/GHC/Driver/Backend.hs - compiler/GHC/Driver/DynFlags.hs - compiler/GHC/Driver/Session.hs - compiler/GHC/HsToCore/Binds.hs - compiler/GHC/HsToCore/Expr.hs - compiler/GHC/HsToCore/Pmc/Solver/Types.hs - compiler/GHC/Parser/Errors/Types.hs - compiler/GHC/Parser/String.hs - compiler/GHC/Platform/LoongArch64.hs → compiler/GHC/Platform/LA64.hs - compiler/GHC/Platform/Regs.hs - compiler/GHC/Rename/Names.hs - compiler/GHC/Runtime/Eval.hs - compiler/GHC/Tc/Errors/Ppr.hs - compiler/GHC/Tc/Errors/Types.hs - compiler/GHC/Tc/Solver.hs - compiler/GHC/Tc/Solver/Dict.hs - compiler/GHC/Tc/Solver/Equality.hs - compiler/GHC/Tc/Solver/InertSet.hs - compiler/GHC/Tc/Solver/Monad.hs - compiler/GHC/Tc/Types/Constraint.hs - compiler/GHC/Tc/Utils/Monad.hs - compiler/GHC/Tc/Utils/TcType.hs - compiler/GHC/Types/Error/Codes.hs - compiler/GHC/Types/Name/Occurrence.hs - compiler/GHC/Types/Unique.hs - compiler/GHC/Unit/Module/Graph.hs - compiler/GHC/Unit/Types.hs - compiler/Language/Haskell/Syntax/Module/Name.hs - compiler/ghc.cabal.in - docs/users_guide/9.14.1-notes.rst - docs/users_guide/exts/explicit_namespaces.rst - hadrian/README.md - hadrian/bindist/config.mk.in - hadrian/hadrian.cabal - hadrian/src/Oracles/Setting.hs - hadrian/src/Rules/BinaryDist.hs - hadrian/src/Settings/Builders/RunTest.hs - libffi-tarballs - libraries/Cabal - libraries/Win32 - libraries/base/changelog.md - libraries/base/src/GHC/JS/Prim/Internal/Build.hs - libraries/base/src/System/CPUTime/Windows.hsc - libraries/base/tests/perf/encodingAllocations.hs - libraries/directory - libraries/ghc-internal/jsbits/base.js - libraries/ghc-internal/jsbits/errno.js - libraries/ghc-internal/src/GHC/Internal/Data/Maybe.hs - libraries/ghc-internal/src/GHC/Internal/System/Posix/Internals.hs - libraries/ghc-internal/src/GHC/Internal/Wasm/Prim/Types.hs - libraries/haskeline - libraries/process - libraries/unix - llvm-targets - m4/fp_cc_supports_target.m4 - m4/fp_setup_windows_toolchain.m4 - m4/fptools_set_platform_vars.m4 - m4/ghc_tables_next_to_code.m4 - rts/StgCRun.c - rts/linker/LoadNativeObjPosix.c - rts/linker/PEi386.c - rts/win32/veh_excn.c - testsuite/tests/driver/RecompExports/RecompExports1.stderr - testsuite/tests/driver/RecompExports/RecompExports4.stderr - testsuite/tests/ghc-api/fixed-nodes/all.T - testsuite/tests/interface-stability/base-exports.stdout-javascript-unknown-ghcjs - testsuite/tests/module/T21826.stderr - testsuite/tests/module/mod81.stderr - testsuite/tests/module/mod91.stderr - + testsuite/tests/parser/should_run/T25937.hs - + testsuite/tests/parser/should_run/T25937.stdout - testsuite/tests/parser/should_run/all.T - + testsuite/tests/parser/should_run/parser_unit_tests.hs - + testsuite/tests/perf/should_run/SpecTyFamRun.hs - + testsuite/tests/perf/should_run/SpecTyFamRun.stdout - + testsuite/tests/perf/should_run/SpecTyFam_Import.hs - testsuite/tests/perf/should_run/all.T - testsuite/tests/printer/T17697.stderr - + testsuite/tests/rename/should_compile/T22581c.hs - + testsuite/tests/rename/should_compile/T22581c_helper.hs - + testsuite/tests/rename/should_compile/T22581d.script - + testsuite/tests/rename/should_compile/T22581d.stdout - + testsuite/tests/rename/should_compile/T25983a.hs - + testsuite/tests/rename/should_compile/T25983a.stderr - + testsuite/tests/rename/should_compile/T25983b.hs - + testsuite/tests/rename/should_compile/T25983b.stderr - + testsuite/tests/rename/should_compile/T25983c.hs - + testsuite/tests/rename/should_compile/T25983c.stderr - + testsuite/tests/rename/should_compile/T25983d.hs - + testsuite/tests/rename/should_compile/T25983d.stderr - + testsuite/tests/rename/should_compile/T25983e.hs - + testsuite/tests/rename/should_compile/T25983e.stderr - + testsuite/tests/rename/should_compile/T25983f.hs - + testsuite/tests/rename/should_compile/T25983f.stderr - + testsuite/tests/rename/should_compile/T25983g.hs - + testsuite/tests/rename/should_compile/T25983g.stderr - + testsuite/tests/rename/should_compile/T25984a.hs - + testsuite/tests/rename/should_compile/T25984a.stderr - + testsuite/tests/rename/should_compile/T25984a_helper.hs - + testsuite/tests/rename/should_compile/T25991a.hs - + testsuite/tests/rename/should_compile/T25991a_helper.hs - testsuite/tests/rename/should_compile/all.T - + testsuite/tests/rename/should_fail/T22581a.hs - + testsuite/tests/rename/should_fail/T22581a.stderr - + testsuite/tests/rename/should_fail/T22581a_helper.hs - + testsuite/tests/rename/should_fail/T22581b.hs - + testsuite/tests/rename/should_fail/T22581b.stderr - + testsuite/tests/rename/should_fail/T22581b_helper.hs - + testsuite/tests/rename/should_fail/T25984b.hs - + testsuite/tests/rename/should_fail/T25984b.stderr - + testsuite/tests/rename/should_fail/T25991b1.hs - + testsuite/tests/rename/should_fail/T25991b1.stderr - + testsuite/tests/rename/should_fail/T25991b2.hs - + testsuite/tests/rename/should_fail/T25991b2.stderr - + testsuite/tests/rename/should_fail/T25991b_helper.hs - testsuite/tests/rename/should_fail/T9006.stderr - testsuite/tests/rename/should_fail/all.T - testsuite/tests/rts/all.T - + testsuite/tests/simplCore/should_compile/SpecTyFam.hs - + testsuite/tests/simplCore/should_compile/SpecTyFam.stderr - + testsuite/tests/simplCore/should_compile/SpecTyFam_Import.hs - testsuite/tests/simplCore/should_compile/all.T - + testsuite/tests/typecheck/should_compile/T26020.hs - + testsuite/tests/typecheck/should_compile/T26020a.hs - + testsuite/tests/typecheck/should_compile/T26020a_help.hs - testsuite/tests/typecheck/should_compile/all.T - + testsuite/tests/typecheck/should_fail/T26004.hs - + testsuite/tests/typecheck/should_fail/T26004.stderr - + testsuite/tests/typecheck/should_fail/T26015.hs - + testsuite/tests/typecheck/should_fail/T26015.stderr - testsuite/tests/typecheck/should_fail/T7453.stderr - testsuite/tests/typecheck/should_fail/all.T - + testsuite/tests/typecheck/should_run/T25998.hs - + testsuite/tests/typecheck/should_run/T25998.stdout - testsuite/tests/typecheck/should_run/all.T - utils/ghc-toolchain/exe/Main.hs - utils/ghc-toolchain/src/GHC/Toolchain/Tools/Cc.hs - utils/haddock/haddock-library/src/Documentation/Haddock/Parser.hs - utils/haddock/haddock-library/test/Documentation/Haddock/ParserSpec.hs - utils/hsc2hs - utils/llvm-targets/gen-data-layout.sh The diff was not included because it is too large. View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/1fb071dba1fdff069ea92a1ee181307... -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/1fb071dba1fdff069ea92a1ee181307... You're receiving this email because of your account on gitlab.haskell.org.