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fix typos in comments; NFC

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llvm-svn: 254266
This commit is contained in:
Sanjay Patel 2015-11-29 22:09:34 +00:00
parent ae7cdf685f
commit 1fcfdccb6c
1 changed files with 8 additions and 6 deletions
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14
lib/Transforms/InstCombine/InstCombineVectorOps.cpp
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@ -162,7 +162,7 @@ Instruction *InstCombiner::visitExtractElementInst(ExtractElementInst &EI) {
}
}
// If the this extractelement is directly using a bitcast from a vector of
// If this extractelement is directly using a bitcast from a vector of
// the same number of elements, see if we can find the source element from
// it. In this case, we will end up needing to bitcast the scalars.
if (BitCastInst *BCI = dyn_cast<BitCastInst>(EI.getOperand(0))) {
@ -183,7 +183,7 @@ Instruction *InstCombiner::visitExtractElementInst(ExtractElementInst &EI) {
if (Instruction *I = dyn_cast<Instruction>(EI.getOperand(0))) {
// Push extractelement into predecessor operation if legal and
// profitable to do so
// profitable to do so.
if (BinaryOperator *BO = dyn_cast<BinaryOperator>(I)) {
if (I->hasOneUse() &&
cheapToScalarize(BO, isa<ConstantInt>(EI.getOperand(1)))) {
@ -229,8 +229,9 @@ Instruction *InstCombiner::visitExtractElementInst(ExtractElementInst &EI) {
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
// Canonicalize extractelement(cast) -> cast(extractelement).
// Bitcasts can change the number of vector elements, and they cost
// nothing.
if (CI->hasOneUse() && (CI->getOpcode() != Instruction::BitCast)) {
Value *EE = Builder->CreateExtractElement(CI->getOperand(0),
EI.getIndexOperand());
@ -244,7 +245,8 @@ Instruction *InstCombiner::visitExtractElementInst(ExtractElementInst &EI) {
// fight the vectorizer.
// If we are extracting an element from a vector select or a select on
// vectors, a select on the scalars extracted from the vector arguments.
// vectors, create a select on the scalars extracted from the vector
// arguments.
Value *TrueVal = SI->getTrueValue();
Value *FalseVal = SI->getFalseValue();
@ -434,7 +436,7 @@ static ShuffleOps collectShuffleElements(Value *V,
}
}
// Otherwise, can't do anything fancy. Return an identity vector.
// Otherwise, we can't do anything fancy. Return an identity vector.
for (unsigned i = 0; i != NumElts; ++i)
Mask.push_back(ConstantInt::get(Type::getInt32Ty(V->getContext()), i));
return std::make_pair(V, nullptr);