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wrong code at -Os with "-mllvm -force-vector-width=4 -mllvm -force-vector-interleave=2" on x86_64-linux-gnu

miscompilation

vectorizers

Status: Open.

#153946 In llvm/llvm-project;

· zhendongsu opened on Aug 16, 2025

perl 5.40.2 fails to run simple script when compiled with Clang-21.1.0-rc2

llvm:optimizations

miscompilation

needs-reductionLarge reproducer that should be reduced into a simpler formLarge reproducer that should be reduced into a simpler form

regression:21

Status: Open.

#152241 In llvm/llvm-project;

· kraj opened on Aug 6, 2025

· 

LLVM 21.x Release

[SPIR-V] OpSpecConstantOp Bitcast error for <code>reversebits</code> vec2/vec3 integer cases

clang:HLSL:SPIRVClang HLSL SPIRV supportClang HLSL SPIRV support

HLSLHLSL Language SupportHLSL Language Support

miscompilation

Status: Open.

#152049 In llvm/llvm-project;

· kmpeng opened on Aug 4, 2025

Template argument limit of 0x7fff in clang-21 onward

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

miscompilation

regression:21

Status: Open.

Bug

#151784 In llvm/llvm-project;

· jameswplayer opened on Aug 1, 2025

[bug][opt][AMDGPU]At the -O2 optimization level, the division computation result for uint64_t type is incorrect

backend:AMDGPU

llvm:optimizations

miscompilation

Status: Open.

Bug

#151676 In llvm/llvm-project;

· 0oyyo0 opened on Aug 1, 2025

[InstCombine] Incorrect fabs + nsz fold

llvm:instcombineCovers the InstCombine, InstSimplify and AggressiveInstCombine passesCovers the InstCombine, InstSimplify and AggressiveInstCombine passes

miscompilation

Status: Open.

Bug

#151303 In llvm/llvm-project;

· nikic opened on Jul 30, 2025

__func__ cannot share addresses with string literals in C

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

miscompilation

Status: Open.

#149749 In llvm/llvm-project;

· Halalaluyafail3 opened on Jul 20, 2025

[x64][win] Bad codegen with -import-call-optimization

backend:X86

miscompilation

platform:windows

Status: Open.

Bug

#149714 In llvm/llvm-project;

· SEt-t opened on Jul 20, 2025

[Clang][RISCV] Unexpectedly lost writes to C99 flexible array member when guaranteed return copy elision should apply

ABIApplication Binary InterfaceApplication Binary Interface

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

miscompilation

Status: Open.

#148536 In llvm/llvm-project;

· resistor opened on Jul 13, 2025

GlobalMerge does not work well with comdat group sections, breaking coverage

coverage

ipoInterprocedural optimizationsInterprocedural optimizations

miscompilation

Status: Open.

#148499 In llvm/llvm-project;

· arielb1 opened on Jul 13, 2025

clang &gt;= 18 .cfi frame check rejects assembly generated by clang (Mach-O)

clangClang issues not falling into any other categoryClang issues not falling into any other category

inline-asm

miscompilation

Status: Open.

#148170 In llvm/llvm-project;

· sternenseemann opened on Jul 11, 2025

Attributor assigns <code>!invariant.load</code> attribute incorrectly

llvm::Attributor

miscompilation

Status: Open.

Bug

#147706 In llvm/llvm-project;

· igogo-x86 opened on Jul 9, 2025