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Using -march=x86-64-v4 seems to be missing +avx512f

new issue

Status: Open.

#193826 In llvm/llvm-project;

· pstarkcdpr opened on Apr 23, 2026

Bots should fail check-libc if the bots can't run tests

cmakeBuild system in general and CMake in particularBuild system in general and CMake in particular

libc

Status: Open.

Bug

#193820 In llvm/llvm-project;

· kaladron opened on Apr 23, 2026

[AArch64][SVE] Missed vectorization opportunity for early-exit loop with store and multiple exits compared to GCC

backend:AArch64

missed-optimization

SVEARM Scalable Vector ExtensionsARM Scalable Vector Extensions

Status: Open.

#193780 In llvm/llvm-project;

· huntersubmit opened on Apr 23, 2026

[AArch64][SVE] Missed vectorization opportunity for early-exit loop with strided access compared to GCC

backend:AArch64

missed-optimization

SVEARM Scalable Vector ExtensionsARM Scalable Vector Extensions

Status: Open.

#193771 In llvm/llvm-project;

· huntersubmit opened on Apr 23, 2026

[LoopFusion] Make sure atomic load and store are treated correctly

loop-fusion

Status: Open.

#193770 In llvm/llvm-project;

· amehsan opened on Apr 23, 2026

[clang] error: invalid version number in '-mlinker-version=2.46.50.20260316' for darwin

clang:driver'clang' and 'clang++' user-facing binaries. Not 'clang-cl''clang' and 'clang++' user-facing binaries. Not 'clang-cl'

Status: Open.

#193751 In llvm/llvm-project;

· trcrsired opened on Apr 23, 2026

[LSROA] Handle PHI & Select instructions

enhancementImproving things as opposed to bug fixing, e.g. new or missing featureImproving things as opposed to bug fixing, e.g. new or missing feature

Status: Open.

#193749 In llvm/llvm-project;

· Keenuts opened on Apr 23, 2026

[LifetimeSafety] False-positive std::shared_ptr constructed from std::unique_ptr

clang:temporal-safetyIssue/FR relating to the lifetime analysis in Clang (-Wdangling, -Wreturn-local-addr)Issue/FR relating to the lifetime analysis in Clang (-Wdangling, -Wreturn-local-addr)

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

Status: Open.

Bug

#193747 In llvm/llvm-project;

· usx95 opened on Apr 23, 2026

[LoopInterchange] Assertion failure when a non-LCSSA PHI exists

loopoptim

Status: Open.

#193746 In llvm/llvm-project;

· kasuga-fj opened on Apr 23, 2026

[LoopInterchange] Infinite loop when a PHI refers to another PHI

loopoptim

Status: Open.

#193733 In llvm/llvm-project;

· kasuga-fj opened on Apr 23, 2026

SimplifyCFG switch-to-lookup forgets about explicit section

llvm:transforms

Status: Open.

#193728 In llvm/llvm-project;

· tkern-ublox opened on Apr 23, 2026

False-positive warnings with TestPTrace()

compiler-rt:asanAddress sanitizerAddress sanitizer

compiler-rt:ubsanUndefined behavior sanitizerUndefined behavior sanitizer

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

Status: Open.

#193714 In llvm/llvm-project;

· mrc0mmand opened on Apr 23, 2026