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[CoroEarly] Infer presplitcoroutine attribute for Switch-Resumed ABI

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

coroutinesC++20 coroutinesC++20 coroutines

llvm:transforms

Status: Draft (not ready).

llvm/llvm-projectnumber 169866

#169866 In llvm/llvm-project;

· NewSigma opened on Nov 28, 2025

[InferAlignment] Enhance alignment propagation for and(ptrtoint, const) pattern.

backend:AMDGPU

backend:PowerPC

backend:RISC-V

backend:SystemZ

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

coroutinesC++20 coroutinesC++20 coroutines

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

llvm:globalisel

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

llvm:transforms

Status: Open (in progress).

llvm/llvm-projectnumber 166935

#166935 In llvm/llvm-project;

· egorshamshura opened on Nov 7, 2025

NRVO for coroutines

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

coroutinesC++20 coroutinesC++20 coroutines

extension:clang

Status: Open.

#164560 In llvm/llvm-project;

· kelbon opened on Oct 22, 2025

Wrong code generated with -fextend-variable-liveness and coroutines

coroutinesC++20 coroutinesC++20 coroutines

Status: Open.

#163007 In llvm/llvm-project;

· avikivity opened on Oct 11, 2025

[WIP][NFC] Start to hide details of DIExpression

coroutinesC++20 coroutinesC++20 coroutines

debuginfo

llvm:codegen

llvm:ir

llvm:SelectionDAGSelectionDAGISel as wellSelectionDAGISel as well

llvm:transforms

Status: Open (in progress).

llvm/llvm-projectnumber 161716

#161716 In llvm/llvm-project;

· slinder1 opened on Oct 2, 2025

[tsan] deadlock detector for custom coroutines?

compiler-rt:tsanThread sanitizerThread sanitizer

coroutinesC++20 coroutinesC++20 coroutines

Status: Open.

#161397 In llvm/llvm-project;

· segoon opened on Sep 30, 2025

[clang] Assertion `F.isPresplitCoroutine() && "The frontend uses Switch-Resumed ABI should emit " "\"presplitcoroutine\" attribute for the coroutine."' failed.

coroutinesC++20 coroutinesC++20 coroutines

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

Status: Open.

Bug

#161078 In llvm/llvm-project;

· k-arrows opened on Sep 28, 2025

crashes with assertion failure when running opt -passes=coro-elide

coroutinesC++20 coroutinesC++20 coroutines

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

Status: Open.

Bug

#157233 In llvm/llvm-project;

· k-arrows opened on Sep 6, 2025

crashes with assertion failure when running opt -passes=coro-early

coroutinesC++20 coroutinesC++20 coroutines

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

Status: Open.

Bug

#156652 In llvm/llvm-project;

· k-arrows opened on Sep 3, 2025

catch exception in coroutine on windows produces segfault

coroutinesC++20 coroutinesC++20 coroutines

platform:windows

Status: Open.

#153949 In llvm/llvm-project;

· kelbon opened on Aug 16, 2025

Elide suspension points via [[clang::coro_await_suspend_destroy]]

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

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

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

coroutinesC++20 coroutinesC++20 coroutines

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 152623

#152623 In llvm/llvm-project;

· snarkmaster opened on Aug 8, 2025

[clang][CodeGen] Promote point of GRO(CWG2563)

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

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

coroutinesC++20 coroutinesC++20 coroutines

Status: Open (in progress).

llvm/llvm-projectnumber 151067

#151067 In llvm/llvm-project;

· NewSigma opened on Jul 29, 2025