[all-commits] [llvm/llvm-project] 2b77a5: [CIR] Add noundef to memchr declaration and call s...

[adams381 via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 2b77a527dcc60384c8d88ae6e583d16bfa2b472b
      https://github.com/llvm/llvm-project/commit/2b77a527dcc60384c8d88ae6e583d16bfa2b472b
  Author: adams381 <adams at nvidia.com>
  Date:   2026-04-14 (Tue, 14 Apr 2026)

  Changed paths:
    M clang/lib/CIR/Lowering/DirectToLLVM/LowerToLLVM.cpp
    M clang/test/CIR/CodeGenBuiltins/builtin-memchr.c

  Log Message:
  -----------
  [CIR] Add noundef to memchr declaration and call sites (#191457)

The memchr LLVM declaration created by MemChrOp lowering had no
arg_attrs, so the lowered IR was missing `noundef` on all three
parameters.  OGCG emits `noundef` on them.

Adds `noundef` to both the `@memchr` declaration and each
`call @memchr` instruction.

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