[all-commits] [llvm/llvm-project] 051918: [DAG] expandIntMINMAX - add umax(x, 1) --> sub(x, cm...

Simon Pilgrim via All-commits all-commits at lists.llvm.org
Fri May 5 11:28:16 PDT 2023

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 051918c71e4d5b612da4124ef86b386c595cea7f
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2023-05-05 (Fri, 05 May 2023)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
    M llvm/lib/Target/X86/X86ISelLowering.cpp

  Log Message:
  [DAG] expandIntMINMAX - add umax(x,1) --> sub(x,cmpeq(x,0)) fold

Move the fold from X86 to generic expansion

(We also have several existing expansions that are missing freezes on repeated operands - I've added a TODO for now).

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