[all-commits] [llvm/llvm-project] 6523e2: [X86] SimplifyDemandedBitsForTargetNode - improve ...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 6523e2f4f930a3e1b9c02d7c45b1859dba098f16
      https://github.com/llvm/llvm-project/commit/6523e2f4f930a3e1b9c02d7c45b1859dba098f16
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2023-04-14 (Fri, 14 Apr 2023)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/combine-testpd.ll
    M llvm/test/CodeGen/X86/combine-testps.ll

  Log Message:
  -----------
  [X86] SimplifyDemandedBitsForTargetNode - improve TESTPS/TESTPD handling for duplicated operands

We often repeat the vector operand in TESTPS(X,X)/TESTPD(X,X) for anyof comparisons - ensure we still only demand the sign bits when the TESTP is the only user of that operand