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lld-link produces binary that behaves differntly from MSVC

lld:COFF

Status: Open.

#193627 In llvm/llvm-project;

· NikitaSmith057 opened on Apr 22, 2026

[AArch64] Assertion `isSVEorStreamingSVEAvailable() && "Tried to get SVE vector length without SVE support!"' failed.

backend:AArch64

crashPrefer [crash-on-valid] or [crash-on-invalid]Prefer [crash-on-valid] or [crash-on-invalid]

SVEARM Scalable Vector ExtensionsARM Scalable Vector Extensions

Status: Open.

Bug

#193626 In llvm/llvm-project;

· k-arrows opened on Apr 22, 2026

[DirectX] DXIL op function attributes are missing nounwind, and are applied to calls instead of declarations

backend:DirectX

Status: Open.

Bug

#193620 In llvm/llvm-project;

· bogner opened on Apr 22, 2026

Unrelated failure of Clang.SemaTemplate/concepts-out-of-line-def.cpp

infrastructureBugs about LLVM infrastructureBugs about LLVM infrastructure

Status: Open.

#193617 In llvm/llvm-project;

· scui-ibm opened on Apr 22, 2026

copy_n() and other *_n() algorithms are buggy: negative counts must be no-ops

diverges-from:edgDoes the clang frontend diverge from edg compiler on this issueDoes the clang frontend diverge from edg compiler on this issue

diverges-from:gccDoes the clang frontend diverge from gcc on this issueDoes the clang frontend diverge from gcc on this issue

diverges-from:msvcDoes the clang frontend diverge from msvc on this issueDoes the clang frontend diverge from msvc on this issue

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

Status: Open.

Bug

#193613 In llvm/llvm-project;

· higher-performance opened on Apr 22, 2026

Request Commit Access For fzakaria

infra:commit-access-request

Status: Open.

#193605 In llvm/llvm-project;

· fzakaria opened on Apr 22, 2026

[lld] Deduplicating strings in the .dynstr section

lld

Status: Open.

#193556 In llvm/llvm-project;

· arrowd opened on Apr 22, 2026

[libc++] Decouple building libc++ from testing libc++ in the CI

infrastructureBugs about LLVM infrastructureBugs about LLVM infrastructure

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

Status: Open.

Feature

#193525 In llvm/llvm-project;

· ldionne opened on Apr 22, 2026

[DAG] computeKnownFPClass - add ISD::FCOPYSIGN handling + test coverage

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

llvm:SelectionDAGSelectionDAGISel as wellSelectionDAGISel as well

Status: Open.

Task

#193501 In llvm/llvm-project;

· RKSimon opened on Apr 22, 2026

[DAG] computeKnownFPClass - add ISD::SELECT/VSELECT handling + test coverage

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

llvm:SelectionDAGSelectionDAGISel as wellSelectionDAGISel as well

Status: Open.

Task

#193500 In llvm/llvm-project;

· RKSimon opened on Apr 22, 2026

[CodeGenPrepare] Miscompile due to GEP unmerging

llvm:codegen

miscompilation

Status: Open.

#193487 In llvm/llvm-project;

· MuellerMP opened on Apr 22, 2026

clang crashes on valid code at -O{2,3} on x86_64-linux-gnu: Assertion `N->getOpcode() != ISD::DELETED_NODE && "DELETED_NODE in CSEMap!"' failed

backend:X86

crashPrefer [crash-on-valid] or [crash-on-invalid]Prefer [crash-on-valid] or [crash-on-invalid]

llvm:SelectionDAGSelectionDAGISel as wellSelectionDAGISel as well

regression

Status: Open.

#193475 In llvm/llvm-project;

· zhendongsu opened on Apr 22, 2026