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[PM/AA] Switch to an early-exit. NFC. This was split out of another

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change because the diff is *useless*. I assure you, I just switched to
early-return in this function.

Cleanup in preparation for my next commit, as requested in code review!

llvm-svn: 242880
This commit is contained in:
Chandler Carruth 2015-07-22 09:44:54 +00:00
parent 939d6a13a3
commit 4237391aee
1 changed files with 44 additions and 45 deletions
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89
lib/Transforms/Vectorize/BBVectorize.cpp
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@ -2809,52 +2809,51 @@ namespace {
if (isa<StoreInst>(I)) {
AA->replaceWithNewValue(I, K);
AA->replaceWithNewValue(J, K);
} else {
Type *IType = I->getType();
Type *JType = J->getType();
VectorType *VType = getVecTypeForPair(IType, JType);
unsigned numElem = VType->getNumElements();
unsigned numElemI = getNumScalarElements(IType);
unsigned numElemJ = getNumScalarElements(JType);
if (IType->isVectorTy()) {
std::vector<Constant*> Mask1(numElemI), Mask2(numElemI);
for (unsigned v = 0; v < numElemI; ++v) {
Mask1[v] = ConstantInt::get(Type::getInt32Ty(Context), v);
Mask2[v] = ConstantInt::get(Type::getInt32Ty(Context), numElemJ+v);
}
K1 = new ShuffleVectorInst(K, UndefValue::get(VType),
ConstantVector::get( Mask1),
getReplacementName(K, false, 1));
} else {
Value *CV0 = ConstantInt::get(Type::getInt32Ty(Context), 0);
K1 = ExtractElementInst::Create(K, CV0,
getReplacementName(K, false, 1));
}
if (JType->isVectorTy()) {
std::vector<Constant*> Mask1(numElemJ), Mask2(numElemJ);
for (unsigned v = 0; v < numElemJ; ++v) {
Mask1[v] = ConstantInt::get(Type::getInt32Ty(Context), v);
Mask2[v] = ConstantInt::get(Type::getInt32Ty(Context), numElemI+v);
}
K2 = new ShuffleVectorInst(K, UndefValue::get(VType),
ConstantVector::get( Mask2),
getReplacementName(K, false, 2));
} else {
Value *CV1 = ConstantInt::get(Type::getInt32Ty(Context), numElem-1);
K2 = ExtractElementInst::Create(K, CV1,
getReplacementName(K, false, 2));
}
K1->insertAfter(K);
K2->insertAfter(K1);
InsertionPt = K2;
return;
}
Type *IType = I->getType();
Type *JType = J->getType();
VectorType *VType = getVecTypeForPair(IType, JType);
unsigned numElem = VType->getNumElements();
unsigned numElemI = getNumScalarElements(IType);
unsigned numElemJ = getNumScalarElements(JType);
if (IType->isVectorTy()) {
std::vector<Constant *> Mask1(numElemI), Mask2(numElemI);
for (unsigned v = 0; v < numElemI; ++v) {
Mask1[v] = ConstantInt::get(Type::getInt32Ty(Context), v);
Mask2[v] = ConstantInt::get(Type::getInt32Ty(Context), numElemJ + v);
}
K1 = new ShuffleVectorInst(K, UndefValue::get(VType),
ConstantVector::get(Mask1),
getReplacementName(K, false, 1));
} else {
Value *CV0 = ConstantInt::get(Type::getInt32Ty(Context), 0);
K1 = ExtractElementInst::Create(K, CV0, getReplacementName(K, false, 1));
}
if (JType->isVectorTy()) {
std::vector<Constant *> Mask1(numElemJ), Mask2(numElemJ);
for (unsigned v = 0; v < numElemJ; ++v) {
Mask1[v] = ConstantInt::get(Type::getInt32Ty(Context), v);
Mask2[v] = ConstantInt::get(Type::getInt32Ty(Context), numElemI + v);
}
K2 = new ShuffleVectorInst(K, UndefValue::get(VType),
ConstantVector::get(Mask2),
getReplacementName(K, false, 2));
} else {
Value *CV1 = ConstantInt::get(Type::getInt32Ty(Context), numElem - 1);
K2 = ExtractElementInst::Create(K, CV1, getReplacementName(K, false, 2));
}
K1->insertAfter(K);
K2->insertAfter(K1);
InsertionPt = K2;
}
// Move all uses of the function I (including pairing-induced uses) after J.