[all-commits] [llvm/llvm-project] 19b0e1: [ConstantFolding] Fold sqrt poison -> poison (#141...

[Luke Lau via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 19b0e1227ca6653405e4a34627d04a14f2287f26
      https://github.com/llvm/llvm-project/commit/19b0e1227ca6653405e4a34627d04a14f2287f26
  Author: Luke Lau <luke at igalia.com>
  Date:   2025-06-11 (Wed, 11 Jun 2025)

  Changed paths:
    M llvm/lib/Analysis/ConstantFolding.cpp
    M llvm/test/Transforms/InstSimplify/fp-undef-poison.ll

  Log Message:
  -----------
  [ConstantFolding] Fold sqrt poison -> poison (#141821)

I noticed this when a sqrt produced by VectorCombine with a poison
operand wasn't getting folded away to poison.

Most intrinsics in general could probably be folded to poison if one of
their arguments are poison too. Are there any exceptions to this we need
to be aware of?



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