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[InstCombine] move declarations closer to uses; NFC 

llvm-svn: 340930
This commit is contained in:
Sanjay Patel 2018-08-29 14:42:12 +00:00
parent 51c9349ab3
commit d4e19d272a
1 changed files with 3 additions and 5 deletions
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8
llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp
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@ -1353,9 +1353,6 @@ static Instruction *foldSelectShuffle(ShuffleVectorInst &Shuf,
Instruction *InstCombiner::visitShuffleVectorInst(ShuffleVectorInst &SVI) {
Value *LHS = SVI.getOperand(0);
Value *RHS = SVI.getOperand(1);
SmallVector<int, 16> Mask = SVI.getShuffleMask();
Type *Int32Ty = Type::getInt32Ty(SVI.getContext());
if (auto *V = SimplifyShuffleVectorInst(
LHS, RHS, SVI.getMask(), SVI.getType(), SQ.getWithInstruction(&SVI)))
return replaceInstUsesWith(SVI, V);
@ -1363,9 +1360,7 @@ Instruction *InstCombiner::visitShuffleVectorInst(ShuffleVectorInst &SVI) {
if (Instruction *I = foldSelectShuffle(SVI, Builder, DL))
return I;
bool MadeChange = false;
unsigned VWidth = SVI.getType()->getVectorNumElements();
APInt UndefElts(VWidth, 0);
APInt AllOnesEltMask(APInt::getAllOnesValue(VWidth));
if (Value *V = SimplifyDemandedVectorElts(&SVI, AllOnesEltMask, UndefElts)) {
@ -1374,7 +1369,10 @@ Instruction *InstCombiner::visitShuffleVectorInst(ShuffleVectorInst &SVI) {
return &SVI;
}
SmallVector<int, 16> Mask = SVI.getShuffleMask();
Type *Int32Ty = Type::getInt32Ty(SVI.getContext());
unsigned LHSWidth = LHS->getType()->getVectorNumElements();
bool MadeChange = false;
// Canonicalize shuffle(x ,x,mask) -> shuffle(x, undef,mask')
// Canonicalize shuffle(undef,x,mask) -> shuffle(x, undef,mask').