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[OpenMP][libomp] Default wait/spin policy causes short many-core workloads to be much slower than GCC/libgomp

new issue

Status: Open.

#195239 In llvm/llvm-project;

· kimwalisch opened on May 1, 2026

ld.lld hangs when building Linux kernel with full LTO after recent flatten change

lld

Status: Open.

#195236 In llvm/llvm-project;

· nathanchance opened on May 1, 2026

Do you still need commit access?

infra:commit-access

Status: Open.

#195233 In llvm/llvm-project;

· github-actions opened on May 1, 2026

[Flang][OpenMP] offload duplicate symbol issue when the same library appears twice on the link line

flang:driver

flang:openmp

Status: Open.

#195188 In llvm/llvm-project;

· ye-luo opened on Apr 30, 2026

opt crash in ScalarEvolution::getBackedgeTakenInfo

Status: Open.

#195176 In llvm/llvm-project;

· thurstond opened on Apr 30, 2026

__builtin_wmemchr ignores -fshort-wchar on non-MSVC targets

clang:codegenIR generation bugs: mangling, exceptions, etc.IR generation bugs: mangling, exceptions, etc.

libc++libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi.libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi.

Status: Open.

#195149 In llvm/llvm-project;

· ahatanak opened on Apr 30, 2026

[clang-format] Wrong spacing in clang-format?

clang-format

questionA question, not bug report. Check out https://llvm.org/docs/GettingInvolved.html instead!A question, not bug report. Check out https://llvm.org/docs/GettingInvolved.html instead!

Status: Open.

#195141 In llvm/llvm-project;

· prj- opened on Apr 30, 2026

[19 regression] crash if template-id used to name base class of dependent member of the current instantiation

c++

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

crash-on-valid

regression:19Regression in 19 releaseRegression in 19 release

Status: Open.

Bug

#195133 In llvm/llvm-project;

· zygoloid opened on Apr 30, 2026

[WebAssembly][SLP] Missed vectorization for byte OR reductions used as non-zero tests

new issue

Status: Open.

#195118 In llvm/llvm-project;

· ParkHanbum opened on Apr 30, 2026

[ExpandReductions] Missing vector_reduce_fmaximum/fminimum handling

llvm:codegen

llvm:transforms

Status: Open.

#195111 In llvm/llvm-project;

· RKSimon opened on Apr 30, 2026

[Clang] false-positive of -Wweak-vtables with [[clang::exclude_from_explicit_instantiation]]

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

false-positiveWarning fires when it should notWarning fires when it should not

regression

Status: Open.

#195110 In llvm/llvm-project;

· philnik777 opened on Apr 30, 2026

[HLSL] Handle ConstantBuffer<T> assignment to T

HLSLHLSL Language SupportHLSL Language Support

Status: Open.

Feature

#195093 In llvm/llvm-project;

· s-perron opened on Apr 30, 2026