ConstantInt::get(Int32Ty,
SrcIdx, false));
}
+ } else if (CastInst *CI = dyn_cast<CastInst>(I)) {
+ // Canonicalize extractelement(cast) -> cast(extractelement)
+ // bitcasts can change the number of vector elements and they cost nothing
+ if (CI->hasOneUse() && EI.hasOneUse() &&
+ (CI->getOpcode() != Instruction::BitCast)) {
+ Value *EE = Builder->CreateExtractElement(CI->getOperand(0),
+ EI.getIndexOperand());
+ return CastInst::Create(CI->getOpcode(), EE, EI.getType());
+ }
}
- // FIXME: Canonicalize extractelement(bitcast) -> bitcast(extractelement)
}
return 0;
}
unsigned VWidth = cast<VectorType>(VecOp->getType())->getNumElements();
APInt UndefElts(VWidth, 0);
APInt AllOnesEltMask(APInt::getAllOnesValue(VWidth));
- if (SimplifyDemandedVectorElts(&IE, AllOnesEltMask, UndefElts))
+ if (Value *V = SimplifyDemandedVectorElts(&IE, AllOnesEltMask, UndefElts)) {
+ if (V != &IE)
+ return ReplaceInstUsesWith(IE, V);
return &IE;
+ }
return 0;
}
APInt UndefElts(VWidth, 0);
APInt AllOnesEltMask(APInt::getAllOnesValue(VWidth));
- if (SimplifyDemandedVectorElts(&SVI, AllOnesEltMask, UndefElts)) {
+ if (Value *V = SimplifyDemandedVectorElts(&SVI, AllOnesEltMask, UndefElts)) {
+ if (V != &SVI)
+ return ReplaceInstUsesWith(SVI, V);
LHS = SVI.getOperand(0);
RHS = SVI.getOperand(1);
MadeChange = true;