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Clang's stddef.h does not expose nullptr_t in C++ mode

c++

clang:frontendLanguage frontend issues, e.g. anything involving "Sema"Language frontend issues, e.g. anything involving "Sema"

confirmedVerified by a second partyVerified by a second party

Status: Open.

#154577 In llvm/llvm-project;

· dascandy opened on Aug 20, 2025

Compile warning with msvc 2022 Microsoft (R) C/C++ Optimizing Compiler Version 19.44.35214 for x64

build-problem

clang:frontendLanguage frontend issues, e.g. anything involving "Sema"Language frontend issues, e.g. anything involving "Sema"

Status: Open.

#154571 In llvm/llvm-project;

· lygstate opened on Aug 20, 2025

[Clang] constant evaluator thinks that elements of an unnamed struct is not initialized

clang:frontendLanguage frontend issues, e.g. anything involving "Sema"Language frontend issues, e.g. anything involving "Sema"

constexprAnything related to constant evaluationAnything related to constant evaluation

Status: Open.

#154567 In llvm/llvm-project;

· philnik777 opened on Aug 20, 2025

[Headers][X86] Allow MMX/SSE/AVX MOVMSK intrinsics to be used in constexpr

backend:X86

clang:frontendLanguage frontend issues, e.g. anything involving "Sema"Language frontend issues, e.g. anything involving "Sema"

clang:headersHeaders provided by Clang, e.g. for intrinsicsHeaders provided by Clang, e.g. for intrinsics

constexprAnything related to constant evaluationAnything related to constant evaluation

good first issuehttps://github.com/llvm/llvm-project/contributehttps://github.com/llvm/llvm-project/contribute

Status: Open.

Task

#154520 In llvm/llvm-project;

· RKSimon opened on Aug 20, 2025

clang crash: UNREACHABLE executed at SemaDeclCXX.cpp:238

clang:frontendLanguage frontend issues, e.g. anything involving "Sema"Language frontend issues, e.g. anything involving "Sema"

confirmedVerified by a second partyVerified by a second party

crash-on-invalid

regression:19Regression in 19 releaseRegression in 19 release

Status: Open.

Bug

#154417 In llvm/llvm-project;

· DKLoehr opened on Aug 19, 2025

New __ptrauth types are wrongly reported as __is_bitwise_cloneable

clang:frontendLanguage frontend issues, e.g. anything involving "Sema"Language frontend issues, e.g. anything involving "Sema"

Status: Open.

#154394 In llvm/llvm-project;

· halbi2 opened on Aug 19, 2025

[Headers][X86] VectorExprEvaluator::VisitCallExpr - allow MMX/SSE/AVX2/AVX512 shift by immediate intrinsics to be used in constexpr

backend:X86

clang:frontendLanguage frontend issues, e.g. anything involving "Sema"Language frontend issues, e.g. anything involving "Sema"

clang:headersHeaders provided by Clang, e.g. for intrinsicsHeaders provided by Clang, e.g. for intrinsics

good first issuehttps://github.com/llvm/llvm-project/contributehttps://github.com/llvm/llvm-project/contribute

Status: Open.

Task

#154293 In llvm/llvm-project;

· RKSimon opened on Aug 19, 2025

[Headers][X86] VectorExprEvaluator::VisitCallExpr - allow SSE/AVX2/AVX512 pack intrinsics to be used in constexpr

backend:X86

clang:frontendLanguage frontend issues, e.g. anything involving "Sema"Language frontend issues, e.g. anything involving "Sema"

clang:headersHeaders provided by Clang, e.g. for intrinsicsHeaders provided by Clang, e.g. for intrinsics

constexprAnything related to constant evaluationAnything related to constant evaluation

good first issuehttps://github.com/llvm/llvm-project/contributehttps://github.com/llvm/llvm-project/contribute

Status: Open.

Task

#154283 In llvm/llvm-project;

· RKSimon opened on Aug 19, 2025

[Clang] Thread safety doesn't allow annotating multiple standard library features

clang:frontendLanguage frontend issues, e.g. anything involving "Sema"Language frontend issues, e.g. anything involving "Sema"

Status: Open.

#154281 In llvm/llvm-project;

· philnik777 opened on Aug 19, 2025

[Headers][X86] Update AVX512CD lzcnt intrinsics to use __builtin_elementwise_ctlz and support constexpr

backend:X86

clang:frontendLanguage frontend issues, e.g. anything involving "Sema"Language frontend issues, e.g. anything involving "Sema"

clang:headersHeaders provided by Clang, e.g. for intrinsicsHeaders provided by Clang, e.g. for intrinsics

constexprAnything related to constant evaluationAnything related to constant evaluation

good first issuehttps://github.com/llvm/llvm-project/contributehttps://github.com/llvm/llvm-project/contribute

Status: Open.

Task

#154279 In llvm/llvm-project;

· RKSimon opened on Aug 19, 2025

Clang argument deduction failure within nested generic lambda

clang:frontendLanguage frontend issues, e.g. anything involving "Sema"Language frontend issues, e.g. anything involving "Sema"

lambdaC++11 lambda expressionsC++11 lambda expressions

regression:15Regression in 15 releaseRegression in 15 release

Status: Open.

Bug

#154065 In llvm/llvm-project;

· sneed-deens opened on Aug 18, 2025

[Clang] constant evaluation should reject reinterpret_casting arbitrary addresses

clang:frontendLanguage frontend issues, e.g. anything involving "Sema"Language frontend issues, e.g. anything involving "Sema"

constexprAnything related to constant evaluationAnything related to constant evaluation

Status: Open.

#154024 In llvm/llvm-project;

· philnik777 opened on Aug 17, 2025