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[Clang] constexpr support for __builtin_convertvector and __builtin_shufflevector #107985

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philnik777 opened this issue Sep 10, 2024 · 4 comments · Fixed by #112129
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[Clang] constexpr support for __builtin_convertvector and __builtin_shufflevector #107985

philnik777 opened this issue Sep 10, 2024 · 4 comments · Fixed by #112129
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clang:frontend Language frontend issues, e.g. anything involving "Sema"

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@philnik777
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LanguageExtensions.rst claims that __builtin_shufflevector and __builtin_convertvector can be constant evaluated, but that's not reflected inside Butiltins.td.
@github-actions github-actions bot added the clang Clang issues not falling into any other category label Sep 10, 2024
@zwuis
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zwuis commented Sep 10, 2024

This is part of #46593.

@RKSimon
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RKSimon commented Sep 22, 2024

This was fixed by #76615

@RKSimon RKSimon closed this as completed Sep 22, 2024
@EugeneZelenko EugeneZelenko added clang:frontend Language frontend issues, e.g. anything involving "Sema" and removed clang Clang issues not falling into any other category labels Sep 22, 2024
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llvmbot commented Sep 22, 2024

@llvm/issue-subscribers-clang-frontend

Author: Nikolas Klauser (philnik777)

LanguageExtensions.rst claims that `__builtin_shufflevector` and `__builtin_convertvector` can be constant evaluated, but that's not reflected inside `Butiltins.td`.

@philnik777
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@RKSimon No, it hasn't: https://godbolt.org/z/c3bTe5Y8E. This report is about the inconsistency that it's documented as such inside LanguageExtensions.rst but not actually marked as such, i.e. a Constexpr attribute is missing from Builtins.td.

@philnik777 philnik777 reopened this Oct 6, 2024
@c8ef c8ef mentioned this issue Oct 13, 2024
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c8ef added a commit that referenced this issue Oct 14, 2024
@c8ef
[clang] Mark __builtin_convertvector and __builtin_shufflevector …
ab6ec7a 
…as `constexpr`. (#112129)

Closes #107985.

LanguageExtensions.rst states that `__builtin_shufflevector` and
`__builtin_convertvector` can be evaluated as constants, but this is not
reflected in Butiltins.td. This patch aligns these two.
DanielCChen pushed a commit to DanielCChen/llvm-project that referenced this issue Oct 16, 2024
@c8ef @DanielCChen
[clang] Mark __builtin_convertvector and __builtin_shufflevector …
9d2ae5b 
…as `constexpr`. (llvm#112129)

Closes llvm#107985.

LanguageExtensions.rst states that `__builtin_shufflevector` and
`__builtin_convertvector` can be evaluated as constants, but this is not
reflected in Butiltins.td. This patch aligns these two.
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[clang] Mark __builtin_convertvector and __builtin_shufflevector as constexpr. c8ef/llvm-project
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@RKSimon @EugeneZelenko @philnik777 @zwuis @llvmbot