Issues

• [InstCombine] Assertion `isa<To>(Val) && "cast<Ty>() argument of incompatible type!"' failed.

  new issue
  llvm/llvm-project#231053 · Filter by author k-arrows opened on Oct 12, 2026

• [flang] Submodule MODULE-prefix diagnostics treat a MODULE-prefixed abstract interface body as a separate module procedure interface

  flang:semantics
  llvm/llvm-project#231051 · Filter by author eugeneepshteyn opened on Oct 12, 2026

• [LoopPeel] Crash: Assertion `(!PeelLast || (canPeelLastIteration(*L, *SE) && PeelCount == 1)) && "when peeling the last iteration, the loop must be supported and can " "only peel a single iteration"' failed.

  confirmedcrash-on-valid
  Bug

  llvm/llvm-project#231037 · Filter by author zxt5 opened on Oct 11, 2026

• [AArch64] Error while trying to spill X8 from class GPR64: Cannot scavenge register without an emergency spill slot!

  backend:AArch64confirmedcrash-on-validgenerated by fuzzer
  Bug

  llvm/llvm-project#231032 · Filter by author XChy opened on Oct 11, 2026
  1

• [LoopVectorize] Hangs in VPlan unrollByUF: exponential recursion in vputils::isUniformAcrossVFsAndUFs

  new issue
  llvm/llvm-project#231031 · Filter by author zxt5 opened on Oct 11, 2026

• [Demangle][Itanium] Unchecked size_t arithmetic accepts invalid lengths and substitution indices

  new issue
  llvm/llvm-project#231026 · Filter by author Gladskih opened on Oct 11, 2026

• [MLIR][Affine] Add opt-in selection of additional loops for unroll-and-jam

  mlir
  llvm/llvm-project#231011 · Filter by author ParkHanbum opened on Oct 11, 2026
  1

• [clang-tidy] New check: modernize-use-std-log2

  check-requestclang-tidy
  Feature

  llvm/llvm-project#230990 · Filter by author denzor200 opened on Oct 11, 2026
  2

• [SPIR-V] Crash in handleMIFlagDecoration with FPFastMathDefault when MachineCSE PRE clones a virtual register

  backend:SPIR-Vconfirmedcrash-on-validregression:22
  Bug

  llvm/llvm-project#230986 · Filter by author vchuravy opened on Oct 11, 2026
  1

• Constant-length reverse loop is not simplified after a stack copy at O3

  loopoptimmissed-optimization
  llvm/llvm-project#230978 · Filter by author Yanwords opened on Oct 11, 2026
  1

• [NVPTX] Volatile loads through noalias readonly kernel parameters become ld.global.nc

  backend:NVPTX
  llvm/llvm-project#230960 · Filter by author nihalpasham opened on Oct 11, 2026

• [WebAssembly] invalid br_table (label types differ) with -wasm-enable-sjlj and -wasm-use-legacy-eh=false; -O0 crashes in CFGStackify

  backend:WebAssemblyconfirmedcrash-on-validregression:23
  Bug

  llvm/llvm-project#230956 · Filter by author gsdali opened on Oct 11, 2026
  1

• [clang] -verify-pch on a C++ PCH without -x c++ segfaults in CXXRecordDecl::addedMember

  clang:modulescrash
  Bug

  llvm/llvm-project#230954 · Filter by author trencik opened on Oct 11, 2026
  6

• Request Commit Access For HelloWorldU

  infra:commit-access-request
  llvm/llvm-project#230950 · Filter by author HelloWorldU opened on Oct 11, 2026
  7

• [X86][StackClash] Guard page skip with -fstack-clash-protection

  backend:X86miscompilation
  Bug

  llvm/llvm-project#230949 · Filter by author shoniecaplan opened on Oct 11, 2026
  1

• [clang] Regression in 23: decltype(V) of a class-type NTTP becomes const X& when a constraint passes V to a concept

  clang:frontendconceptsregression:23
  Bug

  llvm/llvm-project#230945 · Filter by author mpusz opened on Oct 11, 2026
  2

  

• [clang-cl][WinEH] Wrong value after nested catch/rethrow when the inner loop is unrolled

  llvm:codegenmiscompilationplatform:windows
  Bug

  llvm/llvm-project#230940 · Filter by author Colengc opened on Oct 11, 2026

• [clang][CodeGen] Named break directly under a switch case targets the switch exit when optimizing

  clang:codegen
  Bug

  llvm/llvm-project#230932 · Filter by author FlyMan2004 opened on Oct 11, 2026
  2

• [clang][OpenMP] crashes when compiling a templated function with OpenMP collapse and interchange directives inside a switch statement

  clang:frontendclang:openmpcrashgenerated by fuzzer
  Bug

  llvm/llvm-project#230923 · Filter by author k-arrows opened on Oct 11, 2026
  2

• [X86][APX] pure register cfcmov should be enabled

  backend:X86missed-optimizationquestion
  llvm/llvm-project#230922 · Filter by author Andarwinux opened on Oct 11, 2026
  1

• [libc++] call to 'swap' is ambiguous when building libvmaf

  libc++
  llvm/llvm-project#230921 · Filter by author L4cache opened on Oct 11, 2026
  1

• [X86][AVX512] failed to use masked movss for unpredictable floating point cond store

  backend:X86missed-optimization
  Feature

  llvm/llvm-project#230918 · Filter by author Andarwinux opened on Oct 11, 2026
  1

• [LoongArch] SIGBUS in SelectionDAG::LegalizeTypes on sext of shl of an illegal vector type (LSX only)

  backend:loongarchconfirmedcrash-on-validllvm:SelectionDAGregression:23
  Bug

  llvm/llvm-project#230915 · Filter by author setarcos opened on Oct 11, 2026
  1

• [PowerPC] DBG_VALUE inhibits POWER10 PC-relative GOT relaxation

  backend:PowerPCmissed-optimization
  Bug

  llvm/llvm-project#230913 · Filter by author yqtian-se opened on Oct 11, 2026
  1

• [X86][AVX512] bf16 masked load/store shouldn't need avx512bf16

  backend:X86missed-optimization
  Bug

  llvm/llvm-project#230909 · Filter by author Andarwinux opened on Oct 11, 2026
  2