simplify

Author: Thorsten Schütt

llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp

@@ -7150,7 +7150,6 @@ bool CombinerHelper::matchAddOverflow(MachineInstr &MI, BuildFnTy &MatchInfo) {
 void CombinerHelper::applyBuildFnMO(const MachineOperand &MO,
                                     BuildFnTy &MatchInfo) {
   MachineInstr *Root = getDefIgnoringCopies(MO.getReg(), MRI);
-  Builder.setInstrAndDebugLoc(*Root);
   MatchInfo(Builder);
   Root->eraseFromParent();
 }
@@ -7165,10 +7164,6 @@ bool CombinerHelper::matchSextOfTrunc(const MachineOperand &MO,
   if (!Trunc)
     return false;
 
-  // The trunc must have the nsw flag.
-  if (!Trunc->getFlag(MachineInstr::MIFlag::NoSWrap))
-    return false;
-
   Register Dst = Sext->getReg(0);
   Register Src = Trunc->getSrcReg();
 
@@ -7194,10 +7189,6 @@ bool CombinerHelper::matchZextOfTrunc(const MachineOperand &MO,
   if (!Trunc)
     return false;
 
-  // The trunc must have the nuw flag.
-  if (!Trunc->getFlag(MachineInstr::MIFlag::NoUWrap))
-    return false;
-
   Register Dst = Zext->getReg(0);
   Register Src = Trunc->getSrcReg();