[Git][ghc/ghc][wip/marge_bot_batch_merge_job] 4 commits: Lint the compiler for extraneous LANGUAGE pragmas

[Marge Bot]

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


Commits:
42087614 by Hécate at 2020-10-10T04:18:36-04:00
Lint the compiler for extraneous LANGUAGE pragmas

- - - - -
f34695fb by Krzysztof Gogolewski at 2020-10-10T04:18:41-04:00
Linear types: fix quantification in GADTs (#18790)

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d3566895 by Sylvain Henry at 2020-10-10T04:18:46-04:00
Bignum: fix bigNatCompareWord# bug (#18813)

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132304d4 by Simon Peyton Jones at 2020-10-10T04:18:46-04:00
Fix some missed opportunities for preInlineUnconditionally

There are two signficant changes here:

* Ticket #18815 showed that we were missing some opportunities for
  preInlineUnconditionally.  The one-line fix is in the code for
  GHC.Core.Opt.Simplify.Utils.preInlineUnconditionally, which now
  switches off only for INLINE pragmas.  I expanded
  Note [Stable unfoldings and preInlineUnconditionally] to explain.

* When doing this I discovered a way in which preInlineUnconditionally
  was occasionally /too/ eager.  It's all explained in
  Note [Occurrences in stable unfoldings] in GHC.Core.Opt.OccurAnal,
  and the one-line change adding markAllMany to occAnalUnfolding.

I also got confused about what NoUserInline meant, so I've renamed
it to NoUserInlinePrag, and changed its pretty-printing slightly.
That led to soem error messate wibbling, and touches quite a few
files, but there is no change in functionality.

I did a nofib run.  As expected, no significant changes.

        Program           Size    Allocs
----------------------------------------
         sphere          -0.0%     -0.4%
----------------------------------------
            Min          -0.0%     -0.4%
            Max          -0.0%     +0.0%
 Geometric Mean          -0.0%     -0.0%

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30 changed files:

- + compiler/.hlint.yaml
- compiler/GHC/ByteCode/Asm.hs
- compiler/GHC/ByteCode/InfoTable.hs
- compiler/GHC/ByteCode/Instr.hs
- compiler/GHC/ByteCode/Linker.hs
- compiler/GHC/ByteCode/Types.hs
- compiler/GHC/Cmm/CLabel.hs
- compiler/GHC/Cmm/Dataflow/Collections.hs
- compiler/GHC/Cmm/Dataflow/Label.hs
- compiler/GHC/Cmm/Node.hs
- compiler/GHC/Cmm/Pipeline.hs
- compiler/GHC/CmmToAsm/BlockLayout.hs
- compiler/GHC/CmmToAsm/CFG.hs
- compiler/GHC/CmmToAsm/Reg/Graph/SpillCost.hs
- compiler/GHC/CmmToAsm/Reg/Linear/PPC.hs
- compiler/GHC/CmmToAsm/Reg/Linear/SPARC.hs
- compiler/GHC/CmmToC.hs
- compiler/GHC/Core/Coercion.hs
- compiler/GHC/Core/Coercion/Axiom.hs
- compiler/GHC/Core/FamInstEnv.hs
- compiler/GHC/Core/Lint.hs
- compiler/GHC/Core/Map.hs
- compiler/GHC/Core/Multiplicity.hs
- compiler/GHC/Core/Opt/Exitify.hs
- compiler/GHC/Core/Opt/OccurAnal.hs
- compiler/GHC/Core/Opt/SetLevels.hs
- compiler/GHC/Core/Opt/Simplify.hs
- compiler/GHC/Core/Opt/Simplify/Utils.hs
- compiler/GHC/Core/Opt/Specialise.hs
- compiler/GHC/Core/Opt/StaticArgs.hs


The diff was not included because it is too large.


View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/c2de5679cba5e06670c3c971d8707d44559c90a2...132304d4c39997d303e03e7d16c6ef4a227dc171

-- 
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/c2de5679cba5e06670c3c971d8707d44559c90a2...132304d4c39997d303e03e7d16c6ef4a227dc171
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