Marge Bot pushed to branch wip/marge_bot_batch_merge_job at Glasgow Haskell Compiler / GHC

Commits:

• 72d6dc74
  by aparker at 2026-04-20T20:15:44-04:00

  NCG: Implement constant folding for vector simd ops (Issue #25030)
  

• b9cab907
  by sheaf at 2026-04-20T20:15:44-04:00

  Mark some SIMD tests as broken on i386 optllvm
  
  As seen in #25498, several SIMD tests are broken on i386 in the optllvm
  way. This commit marks them as "expect_broken".
  

• 76528cc3
  by Wolfgang Jeltsch at 2026-04-20T20:16:25-04:00

  Move most of the `System.IO` implementation into `base`
  
  This involves a rewrite of the `combine` helper function to avoid the
  use of `last`, which would now be flagged as an error.
  
  Metric Decrease:
      LinkableUsage01
      T3294
  Metric Increase:
      T12227
      T12707
      T5642
  

• ce7bb8e7
  by Luite Stegeman at 2026-04-21T10:05:07-04:00

  rts: add a few missing i386 relocations in the rts linker
  

• bdde1c6e
  by Luite Stegeman at 2026-04-21T10:05:07-04:00

  CodeOutput: Fix finalizers on multiple platforms
  
   - ELF platforms: emit .fini_array section
   - wasm32/Darwin: emit initializer with __cxa_atexit call
   - Windows: use -Wl,--whole-archive to prevent dropping finalizer symbols
   - rts linker: fix crash/assertion failure unloading objects with finalizers
  
  fixes #27072
  

• 7c471bbd
  by Simon Jakobi at 2026-04-21T10:05:08-04:00

  Add regression test for #10531
  
  Closes #10531.
  

60 changed files:

• + changelog.d/fix-finalizers-27072
• + changelog.d/simd_constant_folding
• compiler/GHC/Cmm/Opt.hs
• compiler/GHC/Driver/CodeOutput.hs
• compiler/GHC/Linker/Executable.hs
• compiler/GHC/Types/ForeignStubs.hs
• compiler/GHC/Utils/Misc.hs
• libraries/base/src/Control/Concurrent.hs
• libraries/base/src/GHC/IO/Handle.hs
• libraries/base/src/Prelude.hs
• libraries/base/src/System/IO.hs
• libraries/base/src/Text/Printf.hs
• libraries/ghc-internal/src/GHC/Internal/System/IO.hs
• rts/Linker.c
• rts/LinkerInternals.h
• rts/linker/Elf.c
• + testsuite/tests/codeGen/should_run/T27072d.hs
• + testsuite/tests/codeGen/should_run/T27072d.stdout
• + testsuite/tests/codeGen/should_run/T27072d_c.c
• + testsuite/tests/codeGen/should_run/T27072d_check.c
• + testsuite/tests/codeGen/should_run/T27072w.hs
• + testsuite/tests/codeGen/should_run/T27072w.stdout
• + testsuite/tests/codeGen/should_run/T27072w_c.c
• testsuite/tests/codeGen/should_run/all.T
• + testsuite/tests/driver/T10531/A.hs
• + testsuite/tests/driver/T10531/B.hs
• + testsuite/tests/driver/T10531/C.hs
• + testsuite/tests/driver/T10531/Makefile
• + testsuite/tests/driver/T10531/all.T
• testsuite/tests/interface-stability/base-exports.stdout
• testsuite/tests/interface-stability/base-exports.stdout-javascript-unknown-ghcjs
• testsuite/tests/interface-stability/base-exports.stdout-mingw32
• testsuite/tests/interface-stability/base-exports.stdout-ws-32
• + testsuite/tests/rts/linker/T27072/Lib.c
• + testsuite/tests/rts/linker/T27072/Makefile
• + testsuite/tests/rts/linker/T27072/T27072.stdout
• + testsuite/tests/rts/linker/T27072/all.T
• + testsuite/tests/rts/linker/T27072/main.c
• + testsuite/tests/simd/should_run/Makefile
• + testsuite/tests/simd/should_run/T25030.hs
• + testsuite/tests/simd/should_run/T25030.stdout
• testsuite/tests/simd/should_run/all.T
• testsuite/tests/th/all.T
• testsuite/tests/typecheck/should_compile/T9497a.stderr
• testsuite/tests/typecheck/should_compile/holes.stderr
• testsuite/tests/typecheck/should_compile/holes3.stderr
• testsuite/tests/typecheck/should_compile/valid_hole_fits.stderr
• testsuite/tests/typecheck/should_fail/T9497d.stderr
• testsuite/tests/typecheck/should_run/T9497a-run.stderr
• testsuite/tests/typecheck/should_run/T9497b-run.stderr
• testsuite/tests/typecheck/should_run/T9497c-run.stderr
• utils/haddock/html-test/ref/Bug1004.html
• utils/haddock/html-test/ref/Bug973.html
• utils/haddock/html-test/ref/ConstructorPatternExport.html
• utils/haddock/html-test/ref/DefaultSignatures.html
• utils/haddock/html-test/ref/Hash.html
• utils/haddock/html-test/ref/PatternSyns.html
• utils/haddock/html-test/ref/PatternSyns2.html
• utils/haddock/html-test/ref/QuasiExpr.html
• utils/haddock/html-test/ref/Test.html

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