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[clang] Assertion `(!Result || *Result == Size) && "inconsistent pack sizes"' failed.

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

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

generated by fuzzer

regression:20Regression in 20 releaseRegression in 20 release

Status: Open.

Bug

#193217 In llvm/llvm-project;

· k-arrows opened on Apr 21, 2026

[MLIR][MemRef] ExpandStridedMetadata has subview pattern which conflicts with reinterpret cast folding.

mlir:memref

Status: Open.

#193213 In llvm/llvm-project;

· red1bluelost opened on Apr 21, 2026

[RegAlloc] Greedy RA live-range splitting misses reload on one CFG path (3 distinct manifestations in core::fmt::write / kernel code)

llvm:regalloc

Status: Open.

#193212 In llvm/llvm-project;

· jsloan-red-button opened on Apr 21, 2026

[AMDGPU] Convert mul24 sdwa detection to tablegen predicates

backend:AMDGPU

Status: Open.

Task

#193202 In llvm/llvm-project;

· RKSimon opened on Apr 21, 2026

[Flang] Spurious error for DATA variable that is CHARACTER component of parametrized derived type with constant expression length type parameter

flang:frontend

Status: Open.

#193188 In llvm/llvm-project;

· ejose02 opened on Apr 21, 2026

[MLIR] mergeIdenticalBlocks ignores operation type constraints

mlir

Status: Open.

#193187 In llvm/llvm-project;

· PietroGhg opened on Apr 21, 2026

[Flang] Runtime error for RANDOM_NUMBER with HARVEST argument that is REAL(2)

flang:runtime

Status: Open.

#193185 In llvm/llvm-project;

· ejose02 opened on Apr 21, 2026

[Flang] Spurious error for fixed format OpenMP directive that is continued or contains comment

flang:frontend

flang:openmp

Status: Open.

#193180 In llvm/llvm-project;

· ejose02 opened on Apr 21, 2026

[x86-64] lzcnt64(x) + (x == 0) => lzcnt+adc

llvm:optimizations

missed-optimization

Status: Open.

#193178 In llvm/llvm-project;

· Validark opened on Apr 21, 2026

[Clang] Assertion "Found phi-like recipe after non-phi recipe" failed in LoopVectorize when compiled with -O3

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

vectorizers

Status: Open.

Bug

#193164 In llvm/llvm-project;

· thapgua opened on Apr 21, 2026

[clang-cl][x86] miscompiles co_return std::string("hello") in a coroutine returning std::string

backend:X86

coroutinesC++20 coroutinesC++20 coroutines

platform:windows

Status: Open.

#193161 In llvm/llvm-project;

· sorayuki opened on Apr 21, 2026

[flang][coarray] Unexpected error: 'llvm.mlir.addressof' op must reference a global defined by 'llvm.mlir.global', 'llvm.mlir.alias' or 'llvm.func' or 'llvm.mlir.ifunc'

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

Status: Open.

#193157 In llvm/llvm-project;

· sscalpone opened on Apr 21, 2026