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[Clang] crashes with casting between _Atomic _Complex types

c11

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

crash-on-valid

Status: Open.

#172208 In llvm/llvm-project;

· AmrDeveloper opened on Dec 14, 2025

[LLVM] Plugins broken on AIX

platform:aix

Status: Open.

#172203 In llvm/llvm-project;

· aengelke opened on Dec 14, 2025

[clang][bytecode] crash on __builtin_memchr

clang:bytecodeIssues for the clang bytecode constexpr interpreterIssues for the clang bytecode constexpr interpreter

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

Status: Open.

Bug

#172202 In llvm/llvm-project;

· k-arrows opened on Dec 14, 2025

<code>std::optional&lt;T&gt;::transform</code> does not support user specializations

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

Status: Open.

#172197 In llvm/llvm-project;

· howtonotwin opened on Dec 14, 2025

Clang crashes on valid code when compiling with profiled data using PGO

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

vectorizers

Status: Open.

Bug

#172195 In llvm/llvm-project;

· helloqirun opened on Dec 14, 2025

[missed-opt] Naive per-bit loop not optimized to popcnt

llvm:optimizations

missed-optimization

Status: Open.

#172193 In llvm/llvm-project;

· purplesyringa opened on Dec 14, 2025

[clang][bytecode] Assertion `!ItemTypes.empty()' failed.

clang:bytecodeIssues for the clang bytecode constexpr interpreterIssues for the clang bytecode constexpr interpreter

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

Status: Open.

Bug

#172191 In llvm/llvm-project;

· k-arrows opened on Dec 14, 2025

[Clang] <code>[[clang::objc_direct]]</code> causes an ICE when used on a method in a category

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

llvmUmbrella label for LLVM issuesUmbrella label for LLVM issues

Status: Open.

Bug

#172189 In llvm/llvm-project;

· Frityet opened on Dec 14, 2025

[MLIR][MemRef] GenericAtomicRMW crashes when converting to LLVM when result op is defined outside the region

mlir

Status: Open.

#172184 In llvm/llvm-project;

· ashermancinelli opened on Dec 13, 2025

[clang-tidy] readability-simplify-boolean-expr should handle if statements with init statements

clang-tidy

Status: Open.

#172180 In llvm/llvm-project;

· denzor200 opened on Dec 13, 2025

[missed-opt] [instcombine] fshl/fshr not pushed into constant-argument phi

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

missed-optimization

Status: Open.

#172176 In llvm/llvm-project;

· purplesyringa opened on Dec 13, 2025

[missed-opt] [x86_64] Suboptimal movzx after inline assembly returning a byte

backend:X86

missed-optimization

Status: Open.

#172172 In llvm/llvm-project;

· purplesyringa opened on Dec 13, 2025