[all-commits] [llvm/llvm-project] 48f45f: [X86] Limit mul(x, x) knownbits tests with not unde...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 48f45f6b25f086e5c949648160b0784370435f9f
      https://github.com/llvm/llvm-project/commit/48f45f6b25f086e5c949648160b0784370435f9f
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2022-01-31 (Mon, 31 Jan 2022)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
    M llvm/test/CodeGen/X86/combine-mul.ll

  Log Message:
  -----------
  [X86] Limit mul(x,x) knownbits tests with not undef/poison check

We can only assume bit[1] == zero if its the only demanded bit or the source is not undef/poison