[Git][ghc/ghc][wip/marge_bot_batch_merge_job] 11 commits: hp2ps Utilities.c: include stdlib.h instead of extern malloc and realloc

Mon Feb 17 22:39:31 UTC 2025

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

Commits:
2e05a22b by Jens Petersen at 2025-02-17T17:38:39-05:00
hp2ps Utilities.c: include stdlib.h instead of extern malloc and realloc

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c461dce8 by Rodrigo Mesquita at 2025-02-17T17:38:40-05:00
Inline join points for rhs without free vars

While investigating #25170, we ran into a program (T16473) that allocated 67%
more because of a join point that failed to inline.

Note [Duplicating join points] explains why we want to be conservative
when inlining join points, using as an example a join point that
captures a free variable `f` that becomes available in the continuation
`blah` for further optimisations, as opposed to being lambda-abstracted.

However, when the RHS of the join point has no free variables and is
trivial, the same argument does not apply, and there's nothing to gain
from preserving it.

On the contrary, not inlining these trivial join points such as
    $j f x = K f x |> co
can be actively harmful as they prevent useful optimisations from firing
on the known constructor application. #25723 is such an example.

Therefore, we've extended `uncondInlineJoin` to allow duplicating such closed
trivial join points. See the updated Note [Duplicating join points] for
further details.

Additionally, merge the guards in uncondInlineJoin for point DJ3(b) anad DJ3(c) of
Note [Duplicating join points] to avoid an unnecessary traversal in the
call to `collectArgs`; it's also more uniform.

Co-authored-by: Simon Peyton Jones <simon.peytonjones at gmail.com>

Fixes #25723

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c874dabd by M Farkas-Dyck at 2025-02-17T17:38:44-05:00
Scrub some partiality in `GHC.Tc.Gen.Match`.

In particular, we construct a list of the same length as another list, then loop over both and panic if their lengths are unequal. We can avoid this.

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8f3b92fa by M Farkas-Dyck at 2025-02-17T17:38:44-05:00
Make list of `ParStmtBlock` in `ParStmt` `NonEmpty`.

In the ParStmt constructor Language.Haskell.Syntax.Expr.StmtLR, the 2nd argument, the list of ParStmtBlocks, must be NonEmpty; make it so.

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6043356f by M Farkas-Dyck at 2025-02-17T17:38:45-05:00
GHC.Tc.Gen.Match: Added type signatures for `loop` functions.

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e78fb15c by sternenseemann at 2025-02-17T17:38:51-05:00
GHC: fix reference to function in Note [Target code interpreter]

As far as I could tell, setSessionDynFlags doesn't deal with hsc_interp.
Also added a backreference so this will be updated in the future.

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e265194d by sheaf at 2025-02-17T17:39:00-05:00
Account for skolem escape in mightEqualLater

This commit:

  1. Refactors checkTyEqRhs to allow it be called in pure contexts,
     which means it skips doing any on-the-fly promotion.
  2. Calls checkTyEqRhs in mightEqualLater to check whether it a
     MetaTv can unify with a RHS or whether that would cause e.g.
     skolem escape errors or concreteness errors.

Fixes #25744

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96d3b58d by Sylvain Henry at 2025-02-17T17:39:04-05:00
Remove a bunch of Makefiles from old build system

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91159d36 by M Farkas-Dyck at 2025-02-17T17:39:08-05:00
Totalize `GHC.HsToCore.Match.matchWrappers.initNablasGRHSs`.

Converting from `NonEmpty` to `[]` and back is totally needless.

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5a7f8654 by Matthew Pickering at 2025-02-17T17:39:09-05:00
interpreter: Always print uniques for BCO_NAME labels

In the previous commit I omitted to include the unique, which still
makes it very difficult to trace back where the BCO came from.

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9ece5033 by Matthew Pickering at 2025-02-17T17:39:09-05:00
interpreter: Fix overflows and reentrancy in statistics calculation

1. Use unsigned long for counter, as they can easily overflow if you are
   running a long benchmark.
2. Make interp_shutdown reentrant by copying the command frequency table
   into an array.

Fixes #25756

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47 changed files:

- compiler/GHC.hs
- compiler/GHC/Core/Opt/Simplify/Iteration.hs
- compiler/GHC/Core/Unfold.hs
- compiler/GHC/Driver/Env.hs
- compiler/GHC/Hs/Expr.hs
- compiler/GHC/Hs/Utils.hs
- compiler/GHC/HsToCore/ListComp.hs
- compiler/GHC/HsToCore/Match.hs
- compiler/GHC/HsToCore/Quote.hs
- compiler/GHC/Parser.y
- compiler/GHC/Rename/Expr.hs
- compiler/GHC/StgToByteCode.hs
- compiler/GHC/Tc/Errors/Ppr.hs
- compiler/GHC/Tc/Errors/Types.hs
- compiler/GHC/Tc/Gen/Match.hs
- compiler/GHC/Tc/Solver/Default.hs
- compiler/GHC/Tc/Solver/Dict.hs
- compiler/GHC/Tc/Solver/InertSet.hs
- compiler/GHC/Tc/Solver/Monad.hs
- compiler/GHC/Tc/Solver/Solve.hs
- compiler/GHC/Tc/Utils/Unify.hs
- compiler/GHC/Tc/Zonk/Type.hs
- compiler/GHC/ThToHs.hs
- compiler/GHC/Types/Error/Codes.hs
- compiler/GHC/Types/Name.hs
- compiler/Language/Haskell/Syntax/Expr.hs
- docs/users_guide/9.14.1-notes.rst
- rts/Interpreter.c
- + testsuite/tests/perf/compiler/T25723.hs
- + testsuite/tests/perf/compiler/T25723.stdout
- testsuite/tests/perf/compiler/all.T
- testsuite/tests/simplCore/should_compile/T24229a.stderr
- testsuite/tests/simplCore/should_compile/T24229b.stderr
- + testsuite/tests/th/EmptyParStmt.hs
- + testsuite/tests/th/EmptyParStmt.stderr
- testsuite/tests/th/all.T
- + testsuite/tests/typecheck/should_compile/T25744.hs
- testsuite/tests/typecheck/should_compile/all.T
- − utils/deriveConstants/Makefile
- − utils/genprimopcode/Makefile
- − utils/ghc-pkg/Makefile
- − utils/hp2ps/Makefile
- utils/hp2ps/Utilities.c
- − utils/iserv/Makefile
- − utils/remote-iserv/Makefile
- − utils/runghc/Makefile
- − utils/unlit/Makefile

The diff was not included because it is too large.

View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/d7c6715947c3205596d1a1f5db7096c586db56a6...9ece5033dcd540804d4c8feb03d57fb631a2994c

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