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ninja check-flang-rt is broken on LLVM 21 Windows Release

build-problem

flang:runtime

Status: Open.

#151920 In llvm/llvm-project;

· omjavaid opened on Aug 4, 2025

clang 21.1.0-rc1 creates broken executables on Cygwin/MinGW when linked with GNU ld.bfd

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

Status: Open.

#149639 In llvm/llvm-project;

· jeremyd2019 opened on Jul 19, 2025

release/21.x: [AArch64] Replace expensive move from wzr by two moves via floating point immediate (#146538)

backend:AArch64

Status: Open (in progress).

llvm/llvm-projectnumber 150001

#150001 In llvm/llvm-project;

· llvmbot opened on Jul 22, 2025

release/21.x: [CMake][Release] Build with -ffat-lto-objects (#140381)

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

Status: Open (in progress).

llvm/llvm-projectnumber 151245

#151245 In llvm/llvm-project;

· llvmbot opened on Jul 29, 2025

LLVM 21.1.0: Unable to expand result for ppcf128 with ISD::AssertNoFPClass

backend:PowerPC

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

llvm:SelectionDAGSelectionDAGISel as wellSelectionDAGISel as well

Status: Open.

Bug

#151375 In llvm/llvm-project;

· amy-kwan opened on Jul 30, 2025

release/21.x: [TailDup] Delay aggressive computed-goto taildup to after RegAlloc. (#150911)

backend:AArch64

backend:X86

llvm:codegen

Status: Open (in progress).

llvm/llvm-projectnumber 151680

#151680 In llvm/llvm-project;

· fhahn opened on Aug 1, 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

release/21.x: [Flang] Fix crash when a derived type with private attribute is specified in extends (#151051)

flangFlang issues not falling into any other categoryFlang issues not falling into any other category

flang:fir-hlfir

Status: Open (in progress).

llvm/llvm-projectnumber 152687

#152687 In llvm/llvm-project;

· llvmbot opened on Aug 8, 2025

release/21.x: [libc++] Implement comparison operators for <code>tuple</code> added in C++23 (#148799)

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

Status: Open (in progress).

llvm/llvm-projectnumber 151808

#151808 In llvm/llvm-project;

· frederick-vs-ja opened on Aug 2, 2025

[VectorCombine] VectorCombiner goes into infinite loop

llvm::vectorcombineCost-based vector combine passCost-based vector combine pass

Status: Open.

Bug

#153012 In llvm/llvm-project;

· redstar opened on Aug 11, 2025

clang++ 20 Exceptions crash with (recent) libgcc and aarch64 BTI (Linux)

backend:AArch64

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

Status: Open.

#149267 In llvm/llvm-project;

· ozbenh opened on Jul 17, 2025

release/21.x: PreISelIntrinsicLowering: Lower llvm.log to a loop if scalable vec arg (#129744)

llvm:codegen

llvm:transforms

Status: Open (in progress).

llvm/llvm-projectnumber 153046

#153046 In llvm/llvm-project;

· llvmbot opened on Aug 11, 2025

release/21.x: [libc++] Fix std::variant evaluating template arguments too eagerly (#151028)

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

Status: Open (in progress).

llvm/llvm-projectnumber 153064

#153064 In llvm/llvm-project;

· llvmbot opened on Aug 11, 2025

release/21.x: [RISCV] Cost casts with illegal types that can't be legalized (#153030)

backend:RISC-V

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

Status: Open (in progress).

llvm/llvm-projectnumber 153118

#153118 In llvm/llvm-project;

· llvmbot opened on Aug 12, 2025

github-upload-release broken by the recent changes to the release text / download links

github:workflow

Status: Open.

#153154 In llvm/llvm-project;

· tru opened on Aug 12, 2025

[clang][PAC] ptrauth_qualifier must be considered a feature

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

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

Status: Open (in progress).

llvm/llvm-projectnumber 153291

#153291 In llvm/llvm-project;

· ojhunt opened on Aug 12, 2025

<code>-Wunterminated-string-initialization</code> warning on some kinds of initializations appears to be unactionable

clang:diagnosticsNew/improved warning or error message in Clang, but not in clang-tidy or static analyzerNew/improved warning or error message in Clang, but not in clang-tidy or static analyzer

Status: Open.

Bug

#153314 In llvm/llvm-project;

· alexrp opened on Aug 12, 2025