[Git][ghc/ghc][wip/int-index/type-abs-flag] 7 commits: Add safe list indexing operator: !?

[Matthew Pickering (@mpickering)]

Matthew Pickering pushed to branch wip/int-index/type-abs-flag at Glasgow Haskell Compiler / GHC


Commits:
d53f6f4d by Oleg Grenrus at 2023-01-09T21:11:02-05:00
Add safe list indexing operator: !?

With Joachim's amendments.

Implements https://github.com/haskell/core-libraries-committee/issues/110

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cfaf1ad7 by Nicolas Trangez at 2023-01-09T21:11:03-05:00
rts, tests: limit thread name length to 15 bytes

On Linux, `pthread_setname_np` (or rather, the kernel) only allows for
thread names up to 16 bytes, including the terminating null byte.

This commit adds a note pointing this out in `createOSThread`, and fixes
up two instances where a thread name of more than 15 characters long was
used (in the RTS, and in a test-case).

Fixes: #22366
Fixes: https://gitlab.haskell.org/ghc/ghc/-/issues/22366
See: https://gitlab.haskell.org/ghc/ghc/-/issues/22366#note_460796

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64286132 by Matthew Pickering at 2023-01-09T21:11:03-05:00
Store bootstrap_llvm_target and use it to set LlvmTarget in bindists

This mirrors some existing logic for the bootstrap_target which
influences how TargetPlatform is set.

As described on #21970 not storing this led to `LlvmTarget` being set incorrectly
and hence the wrong `--target` flag being passed to the C compiler.

Towards #21970

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4724e8d1 by Matthew Pickering at 2023-01-09T21:11:04-05:00
Check for FP_LD_NO_FIXUP_CHAINS in installation configure script

Otherwise, when installing from a bindist the C flag isn't passed to the
C compiler.

This completes the fix for #22429

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2e926b88 by Georgi Lyubenov at 2023-01-09T21:11:07-05:00
Fix outdated link to Happy section on sequences

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146a1458 by Matthew Pickering at 2023-01-09T21:11:07-05:00
Revert "NCG(x86): Compile add+shift as lea if possible."

This reverts commit 20457d775885d6c3df020d204da9a7acfb3c2e5a.

See #22666 and #21777

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9020062f by Vladislav Zavialov at 2023-01-10T08:04:31+00:00
Introduce the TypeAbstractions language flag

GHC Proposals #448 "Modern scoped type variables"
and #425 "Invisible binders in type declarations"
introduce a new language extension flag: TypeAbstractions.

Part of the functionality guarded by this flag has already been
implemented, namely type abstractions in constructor patterns, but it
was guarded by a combination of TypeApplications and ScopedTypeVariables
instead of a dedicated language extension flag.

This patch does the following:

* introduces a new language extension flag TypeAbstractions
* requires TypeAbstractions for @a-syntax in constructor patterns
  instead of TypeApplications and ScopedTypeVariables
* creates a User's Guide page for TypeAbstractions and
  moves the "Type Applications in Patterns" section there

To avoid a breaking change, the new flag is implied by
ScopedTypeVariables and is retroactively added to GHC2021.

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30 changed files:

- compiler/GHC/CmmToAsm/X86/CodeGen.hs
- compiler/GHC/Driver/Session.hs
- compiler/GHC/Parser.y
- compiler/GHC/Rename/Pat.hs
- configure.ac
- distrib/configure.ac.in
- docs/users_guide/exts/gadt.rst
- + docs/users_guide/exts/type_abstractions.rst
- docs/users_guide/exts/type_applications.rst
- docs/users_guide/exts/types.rst
- libraries/base/Data/List.hs
- libraries/base/Data/OldList.hs
- libraries/base/GHC/List.hs
- libraries/base/changelog.md
- libraries/ghc-boot-th/GHC/LanguageExtensions/Type.hs
- m4/ghc_llvm_target.m4
- rts/posix/OSThreads.c
- rts/sm/NonMoving.c
- − testsuite/tests/codeGen/should_gen_asm/AddMulX86.asm
- − testsuite/tests/codeGen/should_gen_asm/AddMulX86.hs
- testsuite/tests/codeGen/should_gen_asm/all.T
- testsuite/tests/driver/T4437.hs
- testsuite/tests/rts/pause-resume/pause_resume.c
- testsuite/tests/showIface/DocsInHiFile1.stdout
- testsuite/tests/showIface/DocsInHiFileTH.stdout
- testsuite/tests/showIface/HaddockIssue849.stdout
- testsuite/tests/showIface/HaddockOpts.stdout
- testsuite/tests/showIface/MagicHashInHaddocks.stdout
- testsuite/tests/showIface/NoExportList.stdout
- testsuite/tests/showIface/PragmaDocs.stdout


The diff was not included because it is too large.


View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/449b89e4529416efc24cefdd5c7f12be4a60d688...9020062fc21a2fc598d14d7d011f216fd81073d3

-- 
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/449b89e4529416efc24cefdd5c7f12be4a60d688...9020062fc21a2fc598d14d7d011f216fd81073d3
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