[all-commits] [llvm/llvm-project] 31fc40: [clang][X86] Emit AVX level mismatch psABI warning...

[Benjamin Luke via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 31fc40b0904861d33b926dfd6ea04432e7690c49
      https://github.com/llvm/llvm-project/commit/31fc40b0904861d33b926dfd6ea04432e7690c49
  Author: Benjamin Luke <benjamin.luke at sony.com>
  Date:   2026-07-07 (Tue, 07 Jul 2026)

  Changed paths:
    M clang/docs/ReleaseNotes.md
    M clang/lib/CodeGen/Targets/X86.cpp
    M clang/test/CodeGen/X86/mmx-inline-asm-error.c
    A clang/test/CodeGen/target-avx-abi-diag-knr.c
    M clang/test/CodeGen/target-builtin-error-3.c
    M clang/test/CodeGen/target-features-error-2.c
    A clang/test/CodeGenCXX/target-avx-abi-diag.cpp
    M libcxx/include/__algorithm/simd_utils.h

  Log Message:
  -----------
  [clang][X86] Emit AVX level mismatch psABI warnings on function definitions (#199091)

Emit -WpsABI for x86_64 function definitions whose return type or
parameter type uses a vector wider than 128 bits without the required
ABI feature enabled. 256-bit vectors require avx, and 512-bit vectors
require avx512f.

Previously this diagnostic was only emitted at call sites, so
definitions with wide vector signatures could be introduced without a
warning until they were called. Use the function feature map so
attribute(target("avx/avx512f")) definitions are accepted, and emit no
warnings for prototype-only declarations.



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