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NFC: Code style in VectorUtils.cpp

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Differential Revision:	http://reviews.llvm.org/D12478



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@246381 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Elena Demikhovsky 2015-08-30 13:48:02 +00:00
parent 2b5188b98a
commit 957622ea93
1 changed files with 12 additions and 10 deletions
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22
lib/Analysis/VectorUtils.cpp
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@ -410,22 +410,24 @@ Value *llvm::findScalarElement(Value *V, unsigned EltNo) {
}
/// \brief Get splat value if the input is a splat vector or return nullptr.
/// The value may be extracted from a splat constants vector or from
/// a sequence of instructions that broadcast a single value into a vector.
/// This function is not fully general. It checks only 2 cases:
/// the input value is (1) a splat constants vector or (2) a sequence
/// of instructions that broadcast a single value into a vector.
///
llvm::Value *llvm::getSplatValue(Value *V) {
llvm::ConstantDataVector *CV = dyn_cast<llvm::ConstantDataVector>(V);
if (CV)
if (auto *CV = dyn_cast<ConstantDataVector>(V))
return CV->getSplatValue();
llvm::ShuffleVectorInst *ShuffleInst = dyn_cast<llvm::ShuffleVectorInst>(V);
auto *ShuffleInst = dyn_cast<ShuffleVectorInst>(V);
if (!ShuffleInst)
return nullptr;
// All-zero (our undef) shuffle mask elements.
for (int i : ShuffleInst->getShuffleMask())
if (i != 0 && i != -1)
// All-zero (or undef) shuffle mask elements.
for (int MaskElt : ShuffleInst->getShuffleMask())
if (MaskElt != 0 && MaskElt != -1)
return nullptr;
// The first shuffle source is 'insertelement' with index 0.
llvm::InsertElementInst *InsertEltInst =
dyn_cast<llvm::InsertElementInst>(ShuffleInst->getOperand(0));
auto *InsertEltInst =
dyn_cast<InsertElementInst>(ShuffleInst->getOperand(0));
if (!InsertEltInst || !isa<ConstantInt>(InsertEltInst->getOperand(2)) ||
!cast<ConstantInt>(InsertEltInst->getOperand(2))->isNullValue())
return nullptr;