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[Analyzer] False positive clang-analyzer-core.uninitialized.UndefReturn with function call in the condition

clang:static analyzer

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

Status: Open.

#174507 In llvm/llvm-project;

· ksromanov opened on Jan 5, 2026

Use <code>pmovmskb</code> instead of <code>@llvm.vector.reduce.or.v16i8</code> where possible

backend:X86

missed-optimization

Status: Open.

#174504 In llvm/llvm-project;

· Kmeakin opened on Jan 5, 2026

[MLIR] DCE crashes on CIR

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

mlir

Status: Open.

Bug

#174502 In llvm/llvm-project;

· badumbatish opened on Jan 5, 2026

[AArch64] Use <code>@llvm.vector.reduce.umax.v16i8</code> instead of <code>@llvm.vector.reduce.or.v16i8</code> where possible

backend:AArch64

missed-optimization

Status: Open.

#174500 In llvm/llvm-project;

· Kmeakin opened on Jan 5, 2026

[DirectX] DXIL Embedder triggers assertion "Value not in slotcalculator!" when writing <code>switch</code> statements

clang:HLSL:DXClang HLSL DX(IL|BC) supportClang HLSL DX(IL|BC) support

Status: Open.

Bug

#174485 In llvm/llvm-project;

· Icohedron opened on Jan 5, 2026

IncludeNames reverse mapping misses some lookups

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

Status: Open.

#174482 In llvm/llvm-project;

· kimgr opened on Jan 5, 2026

[HLSL] Add support for groupshared args to HLSL 202x

HLSLHLSL Language SupportHLSL Language Support

Status: Open.

#174472 In llvm/llvm-project;

· spall opened on Jan 5, 2026

[lldb-dap] When running debugging with args in the integrated Terminal it goes to the wrong output

lldb-dap

Status: Open.

#174445 In llvm/llvm-project;

· da-viper opened on Jan 5, 2026

Clang crashes when specializing and using a structured binding for std::expected in a C++ module

clang:modulesC++20 modules and Clang Header ModulesC++20 modules and Clang Header Modules

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

Status: Open.

Bug

#174439 In llvm/llvm-project;

· tomboehmer opened on Jan 5, 2026

[DAG] SDPatternMatch - add m_IntrinsicWOChain() matcher

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

llvm:SelectionDAGSelectionDAGISel as wellSelectionDAGISel as well

Status: Open.

#174436 In llvm/llvm-project;

· RKSimon opened on Jan 5, 2026

__PRETTY_FUNCTION__ changes depending on template instantiation

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

Status: Open.

#174430 In llvm/llvm-project;

· bebuch opened on Jan 5, 2026

[Support][SLP] Support for fractional InstructionCost

llvm:analysisIncludes value tracking, cost tables and constant foldingIncludes value tracking, cost tables and constant folding

llvm:SLPVectorizer

Status: Open.

#174429 In llvm/llvm-project;

· bababuck opened on Jan 5, 2026