[PATCH] D105344: [DAGCombiner] Fold SETCC(FREEZE(x),const) to FREEZE(SETCC(x,const)) if SETCC is used by BRCOND

Sat Jul 17 23:17:28 PDT 2021

aqjune added a comment.

This patch is fixed to deal with pulling out FREEZE from SETCC only. The removal of FREEZE is delegated to visitBRCOND's simplification.

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Comment at: llvm/test/CodeGen/X86/setcc-freeze.ll:31
 ; CHECK-NEXT:    testb %al, %al
 ; CHECK-NEXT:    jne .LBB1_2
 ; CHECK-NEXT:  # %bb.1: # %A
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These suboptimal codes were being generated even if `%cond` was not frozen as well.

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D105344/new/

https://reviews.llvm.org/D105344