Marge Bot pushed to branch wip/marge_bot_batch_merge_job at Glasgow Haskell Compiler / GHC
Commits:
414d8f79 by Simon Jakobi at 2026-06-23T20:22:46-04:00
Add explicit setBit/clearBit/complementBit for instance Bits Integer (#21176)
The default setBit, clearBit, and complementBit methods allocate
intermediate Integers per call. Define them explicitly via the new
integerSetBit[#], integerClearBit[#] and integerComplementBit[#], built
on the BigNat# primitives, which avoid those allocations. Allocation is not
eliminated entirely -- the negative (IN) cases would need in-place mutation,
which is left as future work.
The default methods constant-folded on literal arguments via the
integerOr/integerAnd/integerXor rules, which fold literal Integers of any
size. The explicit functions have no such rule, so they (their Word-argument
wrappers, and the Bits Integer methods) are marked INLINE to expose the
underlying primops to the simplifier; see Note [INLINE for constant folding
of bit operations]. This restores folding only on the small-int (IS) path --
large literal Integers (IP/IN) are no longer constant-folded, a minor
regression for that case. T8832 covers the IS-path folding.
The new golden-output test T21176 checks all three operations against the
default implementations across the sign/size boundaries, recording each
result plus its integerCheck validity. The base and ghc-bignum interface-
stability export goldens gain the new functions.
The main changelog entry lives in changelog.d under a new ghc-internal
section (renamed from ghc-prim).
CLC proposal: https://github.com/haskell/core-libraries-committee/issues/423
Co-Authored-By: Claude Opus 4.7
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4b4a4b4c by Simon Jakobi at 2026-06-23T20:22:51-04:00
Add -dstable-core-dump-order for stable Core dump ordering (#27296)
The order of top-level bindings in Core dumps (-ddump-simpl etc.) is the
compiler's Unique-sensitive internal processing order, so an unrelated
upstream change can reorder them and defeat a textual diff of two dumps.
This adds an opt-in flag -dstable-core-dump-order that reorders the
top-level bindings of dumps routed through dumpPassResult into a stable,
Unique-independent order, so two dumps line up across rebuilds. See
Note [Stable Core dump order] in GHC.Core.Ppr for the sort key and its
rationale.
Adds tests T27296 (binders GHC emits in non-source order by default,
asserted to come out stably ordered under the flag) and T27296b (an
untidied -ddump-float-out dump pinning the ordering of the anonymous lvl
floats by literal value).
Co-Authored-By: Claude Opus 4.8
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0d2db2d6 by mangoiv at 2026-06-23T20:22:52-04:00
compiler: refactor error reporting code for ExplicitLevelImports
Refactors error reporting code for ExplicitLevelImports to pass in a
RdrName and a GlobalReaderElt to be able to report errors that are
faithful to the source and to more precisely distinguish between names
that are in scope from different qualifications.
Fixes #27385 and #26616
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5905a259 by Andreas Klebinger at 2026-06-23T20:22:54-04:00
Fix a profiling race condition resulting in segfaults.
StgToCmm: Don't assume tagged FUN closures in closureCodeBody.
When entering a closure the self/node pointer might not be tagged in
some situations when a thunk is evaluated by multiple threads.
So we most AND away the tag bits rather than subtracting an expected tag.
Apply.cmm: Fix a race condition occuring when a thunk is mutated during GC.
In stg_ap_0_fast when might need to run GC before entering a thunk. If this happens
another thread or the GC itself might mutate the closure making entering it no longer
valid. We now check for this.
Add test and changelog for #27123 fixes.
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61698c72 by Simon Hengel at 2026-06-23T20:22:56-04:00
Add a flag to control GHCi specific error hints (close #27409)
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b060790c by Simon Hengel at 2026-06-23T20:22:57-04:00
Reference correct package in error messages for reexported modules
(fixes #27417)
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113 changed files:
- + changelog.d/26616
- + changelog.d/T21176
- + changelog.d/T27123.md
- changelog.d/config
- + changelog.d/interactive-error-hints
- + changelog.d/reexported-module-errors
- + changelog.d/stable-core-dump-order-27296
- compiler/GHC/Core/Lint.hs
- compiler/GHC/Core/Ppr.hs
- compiler/GHC/Driver/DynFlags.hs
- compiler/GHC/Driver/Flags.hs
- compiler/GHC/Driver/Session.hs
- compiler/GHC/Hs/Expr.hs
- compiler/GHC/Iface/Errors.hs
- compiler/GHC/Iface/Errors/Ppr.hs
- compiler/GHC/Iface/Errors/Types.hs
- compiler/GHC/Rename/Env.hs
- compiler/GHC/Rename/Expr.hs
- compiler/GHC/Rename/HsType.hs
- compiler/GHC/Rename/Module.hs
- compiler/GHC/Rename/Pat.hs
- compiler/GHC/Rename/Splice.hs
- compiler/GHC/Rename/Splice.hs-boot
- compiler/GHC/Rename/Unbound.hs
- compiler/GHC/StgToCmm/Bind.hs
- compiler/GHC/Tc/Errors.hs
- compiler/GHC/Tc/Errors/Ppr.hs
- compiler/GHC/Tc/Errors/Types.hs
- compiler/GHC/Tc/Gen/Export.hs
- compiler/GHC/Tc/Utils/Env.hs
- compiler/GHC/Tc/Utils/Monad.hs
- compiler/GHC/Types/Hint/Ppr.hs
- compiler/GHC/Types/Name/Reader.hs
- compiler/GHC/Unit/Finder.hs
- compiler/GHC/Unit/Finder/Types.hs
- compiler/GHC/Unit/State.hs
- compiler/GHC/Utils/Outputable.hs
- docs/users_guide/debugging.rst
- docs/users_guide/ghci.rst
- ghc/GHCi/UI/Exception.hs
- ghc/Main.hs
- libraries/base/changelog.md
- libraries/ghc-bignum/changelog.md
- libraries/ghc-internal/src/GHC/Internal/Bignum/Integer.hs
- libraries/ghc-internal/src/GHC/Internal/Bits.hs
- rts/Apply.cmm
- testsuite/tests/annotations/should_fail/annfail03.stderr
- testsuite/tests/annotations/should_fail/annfail04.stderr
- testsuite/tests/annotations/should_fail/annfail06.stderr
- testsuite/tests/annotations/should_fail/annfail09.stderr
- testsuite/tests/ghci/prog-mhu002/prog-mhu002c.stdout
- testsuite/tests/ghci/scripts/ghci024.stdout
- testsuite/tests/ghci/scripts/ghci024.stdout-mingw32
- testsuite/tests/interface-stability/ghc-bignum-exports.stdout
- + testsuite/tests/numeric/should_run/T21176.hs
- + testsuite/tests/numeric/should_run/T21176.stdout
- testsuite/tests/numeric/should_run/all.T
- + testsuite/tests/package/ImportReexport.hs
- + testsuite/tests/package/ImportReexport.stderr
- testsuite/tests/package/all.T
- testsuite/tests/quasiquotation/qq001/qq001.stderr
- testsuite/tests/quasiquotation/qq002/qq002.stderr
- testsuite/tests/quasiquotation/qq003/qq003.stderr
- testsuite/tests/quasiquotation/qq004/qq004.stderr
- testsuite/tests/quotes/LiftErrMsg.stderr
- testsuite/tests/quotes/LiftErrMsgDefer.stderr
- testsuite/tests/quotes/LiftErrMsgTyped.stderr
- testsuite/tests/quotes/T10384.stderr
- testsuite/tests/quotes/T5721.stderr
- testsuite/tests/quotes/TH_localname.stderr
- + testsuite/tests/rts/T27123.hs
- testsuite/tests/rts/all.T
- testsuite/tests/simplCore/should_compile/Makefile
- + testsuite/tests/simplCore/should_compile/T27296.hs
- + testsuite/tests/simplCore/should_compile/T27296.stdout
- + testsuite/tests/simplCore/should_compile/T27296b.hs
- + testsuite/tests/simplCore/should_compile/T27296b.stdout
- testsuite/tests/simplCore/should_compile/T8832.hs
- testsuite/tests/simplCore/should_compile/T8832.stdout
- testsuite/tests/simplCore/should_compile/all.T
- testsuite/tests/splice-imports/SI03.stderr
- testsuite/tests/splice-imports/SI05.stderr
- testsuite/tests/splice-imports/SI08.stderr
- testsuite/tests/splice-imports/SI08_oneshot.stderr
- testsuite/tests/splice-imports/SI16.stderr
- testsuite/tests/splice-imports/SI18.stderr
- testsuite/tests/splice-imports/SI20.stderr
- testsuite/tests/splice-imports/SI25.stderr
- testsuite/tests/splice-imports/SI28.stderr
- testsuite/tests/splice-imports/SI29.stderr
- testsuite/tests/splice-imports/SI31.stderr
- testsuite/tests/splice-imports/SI36.stderr
- testsuite/tests/splice-imports/T26088.stderr
- testsuite/tests/splice-imports/T26090.stderr
- + testsuite/tests/splice-imports/T26616.hs
- + testsuite/tests/splice-imports/T26616.stderr
- testsuite/tests/splice-imports/all.T
- testsuite/tests/th/T16976z.stderr
- testsuite/tests/th/T17820a.stderr
- testsuite/tests/th/T17820b.stderr
- testsuite/tests/th/T17820c.stderr
- testsuite/tests/th/T17820d.stderr
- testsuite/tests/th/T17820e.stderr
- testsuite/tests/th/T21547.stderr
- testsuite/tests/th/T23829_hasty.stderr
- testsuite/tests/th/T23829_hasty_b.stderr
- testsuite/tests/th/T23829_tardy.ghc.stderr
- testsuite/tests/th/T26098_local.stderr
- testsuite/tests/th/T26098_quote.stderr
- testsuite/tests/th/T26098_splice.stderr
- testsuite/tests/th/T26099.stderr
- testsuite/tests/th/T26568.stderr
- testsuite/tests/th/T5795.stderr
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View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/1b4aebb7817e3ecfb4c30b7cd2bfff2...
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View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/1b4aebb7817e3ecfb4c30b7cd2bfff2...
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