Marge Bot pushed to branch wip/marge_bot_batch_merge_job at Glasgow Haskell Compiler / GHC Commits: 202b201c by Andreas Klebinger at 2025-05-21T10:16:14-04:00 Interpreter: Add limited support for direct primop evaluation. This commit adds support for a number of primops directly to the interpreter. This avoids the indirection of going through the primop wrapper for those primops speeding interpretation of optimized code up massively. Code involving IntSet runs about 25% faster with optimized core and these changes. For core without breakpoints it's even more pronouced and I saw reductions in runtime by up to 50%. Running GHC itself in the interpreter was sped up by ~15% through this change. Additionally this comment does a few other related changes: testsuite: * Run foundation test in ghci and ghci-opt ways to test these primops. * Vastly expand the foundation test to cover all basic primops by comparing result with the result of calling the wrapper. Interpreter: * When pushing arguments for interpreted primops extend each argument to at least word with when pushing. This avoids some issues with big endian. We can revisit this if it causes performance issues. * Restructure the stack chunk check logic. There are now macros for read accesses which might cross stack chunk boundries and macros which omit the checks which are used when we statically know we access an address in the current stack chunk. - - - - - 67a177b4 by sheaf at 2025-05-21T10:17:04-04:00 QuickLook: do a shape test before unifying This commit ensures we do a shape test before unifying. This ensures we don't try to unify a TyVarTv with a non-tyvar, e.g. alpha[tyv] := Int On the way, we refactor simpleUnifyCheck: 1. Move the checkTopShape check into simpleUnifyCheck 2. Refactors simpleUnifyCheck to return a value of the new type SimpleUnifyResult type. Now, simpleUnifyCheck returns "can unify", "cannot unify" or "dunno" (with "cannot unify" being the new result it can return). Now: - touchabilityTest is included; it it fails we return "cannot unify" - checkTopShape now returns "cannot unify" instead of "dunno" upon failure 3. Move the call to simpleUnifyCheck out of checkTouchableTyVarEq. After that, checkTouchableTyVarEq becames a simple call to checkTyEqRhs, so we inline it. This allows the logic in canEqCanLHSFinish_try_unification to be simplified. In particular, we now avoid calling 'checkTopShape' twice. Two further changes suggested by Simon were also implemented: - In canEqCanLHSFinish, if checkTyEqRhs returns PuFail with 'do_not_prevent_rewriting', we now **continue with this constraint**. This allows us to use the constraint for rewriting. - checkTyEqRhs now has a top-level check to avoid flattening a tyfam app in a top-level equality of the form alpha ~ F tys, as this is going around in circles. This simplifies the implementation without any change in behaviour. Fixes #25950 Fixes #26030 - - - - - 4020972c by sheaf at 2025-05-21T10:17:04-04:00 FixedRuntimeRepError: omit unhelpful explanation This commit tweaks the FixedRuntimeRepError case of pprTcSolverReportMsg, to avoid including an explanation which refers to a type variable that appears nowhere else. For example, the old error message could look like the following: The pattern binding does not have a fixed runtime representation. Its type is: T :: TYPE R Cannot unify ‘R’ with the type variable ‘c0’ because the former is not a concrete ‘RuntimeRep’. With this commit, we now omit the last two lines, because the concrete type variable (here 'c0') does not appear in the type displayed to the user (here 'T :: TYPE R'). - - - - - 7a78ed7d by Andrea Bedini at 2025-05-21T11:20:16-04:00 Don't fail when ghcversion.h can't be found (#26018) If ghcversion.h can't be found, don't try to include it. This happens when there is no rts package in the package db and when -ghcversion-file argument isn't passed. Co-authored-by: Syvlain Henry - - - - - f4a8ce34 by Vladislav Zavialov at 2025-05-21T11:20:17-04:00 Implement -Wpattern-namespace-specifier (#25900) In accordance with GHC Proposal #581 "Namespace-specified imports", section 2.3 "Deprecate use of pattern in import/export lists", the `pattern` namespace specifier is now deprecated. Test cases: T25900 T25900_noext - - - - - 92 changed files: - compiler/GHC/Builtin/primops.txt.pp - compiler/GHC/ByteCode/Asm.hs - compiler/GHC/ByteCode/Instr.hs - compiler/GHC/Driver/Flags.hs - compiler/GHC/Driver/Pipeline/Execute.hs - compiler/GHC/Driver/Session.hs - compiler/GHC/Parser.y - compiler/GHC/Parser/Errors/Ppr.hs - compiler/GHC/Parser/Errors/Types.hs - compiler/GHC/Parser/PostProcess.hs - compiler/GHC/StgToByteCode.hs - compiler/GHC/SysTools/Cpp.hs - compiler/GHC/Tc/Errors/Ppr.hs - compiler/GHC/Tc/Gen/App.hs - compiler/GHC/Tc/Solver/Equality.hs - compiler/GHC/Tc/Solver/Monad.hs - compiler/GHC/Tc/Types/Constraint.hs - compiler/GHC/Tc/Utils/Unify.hs - compiler/GHC/Types/Error/Codes.hs - compiler/GHC/Types/Hint.hs - compiler/GHC/Types/Hint/Ppr.hs - docs/users_guide/9.14.1-notes.rst - docs/users_guide/using-warnings.rst - hadrian/src/Flavour.hs - libraries/ghc-internal/src/GHC/Internal/Data/Typeable/Internal.hs - libraries/ghc-internal/src/GHC/Internal/Type/Reflection.hs - libraries/ghc-internal/src/GHC/Internal/TypeLits.hs - libraries/ghc-internal/src/GHC/Internal/TypeNats.hs - rts/Disassembler.c - rts/Interpreter.c - rts/include/rts/Bytecodes.h - testsuite/tests/callarity/unittest/CallArity1.hs - testsuite/tests/codeGen/should_run/all.T - testsuite/tests/driver/Makefile - testsuite/tests/driver/all.T - + testsuite/tests/ghci/all.T - + testsuite/tests/ghci/ghci-mem-primops.hs - + testsuite/tests/ghci/ghci-mem-primops.script - + testsuite/tests/ghci/ghci-mem-primops.stdout - testsuite/tests/ghci/scripts/ghci024.stdout - testsuite/tests/ghci/scripts/ghci024.stdout-mingw32 - testsuite/tests/numeric/should_run/all.T - testsuite/tests/numeric/should_run/foundation.hs - testsuite/tests/numeric/should_run/foundation.stdout - + testsuite/tests/parser/should_compile/T25900.hs - + testsuite/tests/parser/should_compile/T25900.stderr - + testsuite/tests/parser/should_compile/T25900_noext.hs - + testsuite/tests/parser/should_compile/T25900_noext.stderr - testsuite/tests/parser/should_compile/all.T - testsuite/tests/patsyn/should_compile/ImpExp_Exp.hs - testsuite/tests/patsyn/should_compile/T11959.hs - testsuite/tests/patsyn/should_compile/T11959.stderr - testsuite/tests/patsyn/should_compile/T11959Lib.hs - testsuite/tests/patsyn/should_compile/T13350/boolean/Boolean.hs - testsuite/tests/patsyn/should_compile/T22521.hs - testsuite/tests/patsyn/should_compile/T9857.hs - testsuite/tests/patsyn/should_compile/export.hs - testsuite/tests/pmcheck/complete_sigs/T25115a.hs - testsuite/tests/pmcheck/should_compile/T11822.hs - testsuite/tests/polykinds/T14270.hs - testsuite/tests/rename/should_compile/T12548.hs - testsuite/tests/rename/should_fail/T25056.stderr - testsuite/tests/rename/should_fail/T25056a.hs - testsuite/tests/rep-poly/RepPolyTuple4.stderr - testsuite/tests/rep-poly/T19709b.stderr - testsuite/tests/rep-poly/T23903.stderr - testsuite/tests/simplCore/should_compile/T15186.hs - testsuite/tests/simplCore/should_compile/T15186A.hs - testsuite/tests/simplCore/should_compile/simpl017.stderr - + testsuite/tests/typecheck/should_compile/T26030.hs - testsuite/tests/typecheck/should_compile/TypeRepCon.hs - testsuite/tests/typecheck/should_compile/all.T - + testsuite/tests/typecheck/should_fail/T25950.hs - + testsuite/tests/typecheck/should_fail/T25950.stderr - testsuite/tests/typecheck/should_fail/all.T - testsuite/tests/warnings/should_compile/DataToTagWarnings.hs - testsuite/tests/warnings/should_compile/T14794a.hs - testsuite/tests/warnings/should_compile/T14794a.stderr - testsuite/tests/warnings/should_compile/T14794b.hs - testsuite/tests/warnings/should_compile/T14794b.stderr - testsuite/tests/warnings/should_compile/T14794c.hs - testsuite/tests/warnings/should_compile/T14794c.stderr - testsuite/tests/warnings/should_compile/T14794d.hs - testsuite/tests/warnings/should_compile/T14794d.stderr - testsuite/tests/warnings/should_compile/T14794e.hs - testsuite/tests/warnings/should_compile/T14794e.stderr - testsuite/tests/warnings/should_compile/T14794f.hs - testsuite/tests/warnings/should_compile/T14794f.stderr - testsuite/tests/wcompat-warnings/Template.hs - + testsuite/tests/wcompat-warnings/WCompatWarningsOn.stderr - utils/genprimopcode/Main.hs - utils/genprimopcode/Syntax.hs The diff was not included because it is too large. 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