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IRBuilder: add a CreateShuffleVector function that takes an ArrayRef of int

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This is a convenience function to ease mask creation of ShuffleVectors
in AutoUpgrade and other places.

Differential Revision: http://reviews.llvm.org/D8184

llvm-svn: 232047
This commit is contained in:
Sanjay Patel 2015-03-12 15:27:07 +00:00
parent b58c185f5a
commit 1912cfcc7b
2 changed files with 12 additions and 4 deletions
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10
include/llvm/IR/IRBuilder.h
View File

@ -1486,6 +1486,16 @@ public:
return Insert(new ShuffleVectorInst(V1, V2, Mask), Name); return Insert(new ShuffleVectorInst(V1, V2, Mask), Name);
} }
Value *CreateShuffleVector(Value *V1, Value *V2, ArrayRef<int> IntMask,
const Twine &Name = "") {
size_t MaskSize = IntMask.size();
SmallVector<Constant*, 8> MaskVec(MaskSize);
for (size_t i = 0; i != MaskSize; ++i)
MaskVec[i] = getInt32(IntMask[i]);
Value *Mask = ConstantVector::get(MaskVec);
return CreateShuffleVector(V1, V2, Mask, Name);
}
Value *CreateExtractValue(Value *Agg, Value *CreateExtractValue(Value *Agg,
ArrayRef<unsigned> Idxs, ArrayRef<unsigned> Idxs,
const Twine &Name = "") { const Twine &Name = "") {

6
lib/IR/AutoUpgrade.cpp
View File

@ -568,11 +568,9 @@ void llvm::UpgradeIntrinsicCall(CallInst *CI, Function *NewFn) {
CI->getArgOperand(0), CI->getArgOperand(0),
PointerType::getUnqual(VectorType::get(Type::getInt64Ty(C), 2))); PointerType::getUnqual(VectorType::get(Type::getInt64Ty(C), 2)));
Value *Load = Builder.CreateLoad(Op); Value *Load = Builder.CreateLoad(Op);
SmallVector<Constant *, 4> Idxs; // 0, 1, 0, 1. int Idxs[4] = { 0, 1, 0, 1 };
for (unsigned i = 0; i != 4; ++i)
Idxs.push_back(Builder.getInt32(i & 1));
Rep = Builder.CreateShuffleVector(Load, UndefValue::get(Load->getType()), Rep = Builder.CreateShuffleVector(Load, UndefValue::get(Load->getType()),
ConstantVector::get(Idxs)); Idxs);
} else if (Name == "llvm.x86.sse2.psll.dq") { } else if (Name == "llvm.x86.sse2.psll.dq") {
// 128-bit shift left specified in bits. // 128-bit shift left specified in bits.
unsigned Shift = cast<ConstantInt>(CI->getArgOperand(1))->getZExtValue(); unsigned Shift = cast<ConstantInt>(CI->getArgOperand(1))->getZExtValue();