[Git][ghc/ghc][wip/T21851] 11 commits: Extend documentation for Data.List, mostly wrt infinite lists

Wed Oct 12 07:49:12 UTC 2022

Simon Peyton Jones pushed to branch wip/T21851 at Glasgow Haskell Compiler / GHC

Commits:
da679f2e by Bodigrim at 2022-10-11T18:02:59-04:00
Extend documentation for Data.List, mostly wrt infinite lists

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9c099387 by jwaldmann at 2022-10-11T18:02:59-04:00
Expand comment for Data.List.permutations
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d3863cb7 by Bodigrim at 2022-10-11T18:03:37-04:00
ByteArray# is unlifted, not unboxed

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f6260e8b by Ben Gamari at 2022-10-11T23:45:10-04:00
rts: Add missing declaration of stg_noDuplicate

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69ccec2c by Ben Gamari at 2022-10-11T23:45:10-04:00
base: Move CString, CStringLen to GHC.Foreign

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f6e8feb4 by Ben Gamari at 2022-10-11T23:45:10-04:00
base: Move IPE helpers to GHC.InfoProv

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866c736e by Ben Gamari at 2022-10-11T23:45:10-04:00
rts: Refactor IPE tracing support

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6b0d2022 by Ben Gamari at 2022-10-11T23:45:10-04:00
Refactor IPE initialization

Here we refactor the representation of info table provenance information
in object code to significantly reduce its size and link-time impact.
Specifically, we deduplicate strings and represent them as 32-bit
offsets into a common string table.

In addition, we rework the registration logic to eliminate allocation
from the registration path, which is run from a static initializer where
things like allocation are technically undefined behavior (although it
did previously seem to work). For similar reasons we eliminate lock
usage from registration path, instead relying on atomic CAS.

Closes #22077.

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9b572d54 by Ben Gamari at 2022-10-11T23:45:10-04:00
Separate IPE source file from span

The source file name can very often be shared across many IPE entries
whereas the source coordinates are generally unique. Separate the two to
exploit sharing of the former.

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27978ceb by Krzysztof Gogolewski at 2022-10-11T23:45:46-04:00
Make Cmm Lint messages use dump style

Lint errors indicate an internal error in GHC, so it makes sense to use
it instead of the user style. This is consistent with Core Lint and STG Lint:

https://gitlab.haskell.org/ghc/ghc/-/blob/22096652/compiler/GHC/Core/Lint.hs#L429

https://gitlab.haskell.org/ghc/ghc/-/blob/22096652/compiler/GHC/Stg/Lint.hs#L144

Fixes #22218.

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a45d8e6f by Simon Peyton Jones at 2022-10-12T08:51:10+01:00
Fire RULES in the Specialiser

The Specialiser has, for some time, fires class-op RULES in the
specialiser itself: see
   Note [Specialisation modulo dictionary selectors]

This MR beefs it up a bit, so that it fires /all/ RULES in the
specialiser, not just class-op rules.  See
   Note [Fire rules in the specialiser]
The result is a bit more specialisation; see test
   simplCore/should_compile/T21851_2

This pushed me into a bit of refactoring.  I made a new data types
GHC.Core.Rules.RuleEnv, which combines
  - the several source of rules (local, home-package, external)
  - the orphan-module dependencies

in a single record for `getRules` to consult.  That drove a bunch of
follow-on refactoring, including allowing me to remove
cr_visible_orphan_mods from the CoreReader data type.

I moved some of the RuleBase/RuleEnv stuff into GHC.Core.Rule.

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30 changed files:

- compiler/GHC/Cmm/CLabel.hs
- compiler/GHC/Cmm/Lint.hs
- compiler/GHC/Cmm/Parser.y
- compiler/GHC/Core.hs
- compiler/GHC/Core/InstEnv.hs
- compiler/GHC/Core/Opt/Monad.hs
- compiler/GHC/Core/Opt/Pipeline.hs
- compiler/GHC/Core/Opt/Simplify.hs
- compiler/GHC/Core/Opt/Simplify/Monad.hs
- compiler/GHC/Core/Opt/Simplify/Utils.hs
- compiler/GHC/Core/Opt/Specialise.hs
- compiler/GHC/Core/Rules.hs
- compiler/GHC/Driver/CodeOutput.hs
- compiler/GHC/Driver/Config/Core/Opt/Simplify.hs
- compiler/GHC/Driver/Main.hs
- + compiler/GHC/StgToCmm/InfoTableProv.hs
- compiler/GHC/StgToCmm/Prof.hs
- compiler/GHC/Unit/External.hs
- compiler/ghc.cabal.in
- libraries/base/Data/Array/Byte.hs
- libraries/base/Data/List.hs
- libraries/base/Data/OldList.hs
- libraries/base/Foreign/C/String.hs
- libraries/base/GHC/Foreign.hs
- + libraries/base/GHC/InfoProv.hsc
- libraries/base/GHC/List.hs
- libraries/base/GHC/Real.hs
- libraries/base/GHC/Stack/CCS.hsc
- libraries/base/GHC/Stack/CloneStack.hs
- libraries/base/base.cabal

The diff was not included because it is too large.

View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/7a90f5f76355ab122de705f0a87e40483ea1133f...a45d8e6f09d21f22dc13abb44b360a5304f61590

-- 
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/7a90f5f76355ab122de705f0a87e40483ea1133f...a45d8e6f09d21f22dc13abb44b360a5304f61590
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