Remove some setInstrAndDebugLoc

Author: davemgreen

llvm/lib/Target/AArch64/GISel/AArch64PostLegalizerCombiner.cpp

@@ -549,7 +549,6 @@ void applyExtMulToMULL(MachineInstr &MI, MachineRegisterInfo &MRI,
   if (Src2Ty.getScalarSizeInBits() * 2 != DstTy.getScalarSizeInBits())
     Src2Reg = B.buildExtOrTrunc(ExtOpc, {HalfDstTy}, {Src2Reg}).getReg(0);
 
-  B.setInstrAndDebugLoc(MI);
   B.buildInstr(IsZExt ? AArch64::G_UMULL : AArch64::G_SMULL,
                {MI.getOperand(0).getReg()}, {Src1Reg, Src2Reg});
   MI.eraseFromParent();

llvm/lib/Target/AArch64/GISel/AArch64PostLegalizerLowering.cpp

@@ -1205,7 +1205,6 @@ void applyMulv2s64(MachineInstr &MI, MachineRegisterInfo &MRI,
   LLT DstTy = MRI.getType(MI.getOperand(0).getReg());
   assert(DstTy == LLT::fixed_vector(2, 64) && "Expected v2s64 Mul");
   LegalizerHelper Helper(*MI.getMF(), Observer, B);
-  B.setInstrAndDebugLoc(MI);
   Helper.fewerElementsVector(
       MI, 0,
       DstTy.changeElementCount(DstTy.getElementCount().divideCoefficientBy(2)));