Issues

• [LoopVectorize] Loop-invariant backedge values unable to recognise fixed-order recurrences

  missed-optimizationvectorizers
  llvm/llvm-project#228018 · Filter by author yafet-a opened on Oct 1, 2026

• [X86] Duplicate cmp when sbb and cmov use the same compare, depending on IR order

  backend:X86missed-optimization
  llvm/llvm-project#228012 · Filter by author chfast opened on Oct 1, 2026
  1

• [ClangIR] Assertion `mlir::cast<cir::PointerType>(pointer.getType()).getPointee() == elementType' failed.

  ClangIRcrashgenerated by fuzzer
  Bug

  llvm/llvm-project#228008 · Filter by author k-arrows opened on Oct 1, 2026

• [clang] hasAttribute not supported for keyword with -fms-compatibility

  clang:frontendcrashgenerated by fuzzerregression:21
  Bug

  llvm/llvm-project#228003 · Filter by author k-arrows opened on Oct 1, 2026
  2

• [MLIR] Missed Optimization: Partial ownership simplification leaves redundant deallocation candidates

  mlir
  llvm/llvm-project#227996 · Filter by author MonSec-2077 opened on Oct 1, 2026
  2

• [MLIR] Missed Optimization: fold-tensor-subset-ops rejects in-bounds transfer reads with explicit masks

  mlir
  llvm/llvm-project#227993 · Filter by author MonSec-2077 opened on Oct 1, 2026
  2

• [SimplifyCFG] 2-word add via uadd.with.overflow costs 4x add i128 in two-entry PHI folding

  llvm:transformsmissed-optimization
  llvm/llvm-project#227991 · Filter by author chfast opened on Oct 1, 2026

• Do you still need commit access?

  infra:commit-access
  llvm/llvm-project#227990 · Filter by author github-actions opened on Oct 1, 2026
  5

• [clang-tidy] misc-const-correctness should not warn about the signature of main

  clang-tidyfalse-positive
  Bug

  llvm/llvm-project#227988 · Filter by author carlosgalvezp opened on Oct 1, 2026
  1

• [MC] CFI directive in another .text subsection than .cfi_startproc is not diagnosed; asserts isUInt<32>(AddrDelta)

  confirmedcrash-on-valid
  Bug

  llvm/llvm-project#227982 · Filter by author skaeads12 opened on Oct 1, 2026

• [ClangIR][OpenMP] Assertion `pointer && "Pointer cannot be null"' failed.

  clang:openmpClangIRcrashgenerated by fuzzer
  Bug

  llvm/llvm-project#227981 · Filter by author k-arrows opened on Oct 1, 2026

• [ClangIR] Assertion `!count.isNegative() && "Expected non-negative array size"' failed.

  ClangIRcrashgenerated by fuzzer
  Bug

  llvm/llvm-project#227980 · Filter by author k-arrows opened on Oct 1, 2026

• Clang versions > 19: optimizations elides conditionals that would prevent use of uninitialized variables.

  confirmedmiscompilationregression:19
  Bug

  llvm/llvm-project#227978 · Filter by author Oblomov opened on Oct 1, 2026

• [DebugInfo] DW_OP_LLVM_extract_bits emits a malformed ULEB128 operand for DW_OP_deref_size

  clang:codegendebuginfo
  Bug

  llvm/llvm-project#227952 · Filter by author firmiana402 opened on Oct 1, 2026
  2

• [MC] .fill N, 0 crashes release builds with SIGFPE since clang 23.1; asserts "Illegal fragment fill size"

  confirmedcrash-on-validllvm:mcregression:23
  Bug

  llvm/llvm-project#227951 · Filter by author skaeads12 opened on Oct 1, 2026
  1

• [DebugInfo] LoopStrengthReduce combines a generic constant with a typed operand in DWARF expressions

  debuginfoloopoptim
  Bug

  llvm/llvm-project#227946 · Filter by author firmiana402 opened on Oct 1, 2026
  1

• [DebugInfo] DAGCombiner extending-load salvage creates invalid typed comparisons

  debuginfo
  llvm/llvm-project#227945 · Filter by author firmiana402 opened on Oct 1, 2026
  1

• [DebugInfo] SelectionDAG truncation salvage changes a valid DWARF expression into an invalid one

  debuginfollvm:SelectionDAG
  llvm/llvm-project#227938 · Filter by author firmiana402 opened on Oct 1, 2026
  1

• [DebugInfo] GlobalISel truncation salvage mixes a typed value with a generic comparison constant

  debuginfollvm:globalisel
  llvm/llvm-project#227937 · Filter by author firmiana402 opened on Oct 1, 2026
  1

• [DebugInfo] DIExpression constant folding drops the DWARF type of a constant

  debuginfo
  Bug

  llvm/llvm-project#227933 · Filter by author firmiana402 opened on Oct 1, 2026
  1

• [AArch64][GlobalISel] Debug instructions break carry-producer adjacency

  backend:AArch64good first issuellvm:globalisel
  llvm/llvm-project#227927 · Filter by author yqtian-se opened on Oct 1, 2026
  4

• [Hexagon] Debug uses change constant-extender base selection

  backend:Hexagon
  llvm/llvm-project#227926 · Filter by author yqtian-se opened on Oct 1, 2026
  1

• [ARM] Debug instructions prevent Thumb1 compare elimination

  backend:ARM
  llvm/llvm-project#227925 · Filter by author yqtian-se opened on Oct 1, 2026
  1

• [PowerPC] Debug uses prevent RLWINM/RLDICL-to-ANDI conversion

  backend:PowerPC
  llvm/llvm-project#227924 · Filter by author yqtian-se opened on Oct 1, 2026
  1

• [PowerPC] Debug uses prevent compare folding into record-form instructions

  backend:PowerPC
  llvm/llvm-project#227923 · Filter by author yqtian-se opened on Oct 1, 2026
  1