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[InstCombine] [NFC] Use a pattern matcher for ExtractElementInst 

Reviewed By: RKSimon, rampitec

Differential Revision: https://reviews.llvm.org/D125857
This commit is contained in:
Chenbing Zheng 2022-05-20 09:56:33 +08:00
parent d33c36235d
commit cf348f6a2c
1 changed files with 7 additions and 7 deletions
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14
llvm/lib/Transforms/InstCombine/InstCombineCasts.cpp
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@ -2350,9 +2350,9 @@ static Value *optimizeIntegerToVectorInsertions(BitCastInst &CI,
/// usually not type-specific like scalar integer or scalar floating-point.
static Instruction *canonicalizeBitCastExtElt(BitCastInst &BitCast,
InstCombinerImpl &IC) {
// TODO: Create and use a pattern matcher for ExtractElementInst.
auto *ExtElt = dyn_cast<ExtractElementInst>(BitCast.getOperand(0));
if (!ExtElt || !ExtElt->hasOneUse())
Value *VecOp, *Index;
if (!match(BitCast.getOperand(0),
m_OneUse(m_ExtractElt(m_Value(VecOp), m_Value(Index)))))
return nullptr;
// The bitcast must be to a vectorizable type, otherwise we can't make a new
@ -2361,10 +2361,10 @@ static Instruction *canonicalizeBitCastExtElt(BitCastInst &BitCast,
if (!VectorType::isValidElementType(DestType))
return nullptr;
auto *NewVecType = VectorType::get(DestType, ExtElt->getVectorOperandType());
auto *NewBC = IC.Builder.CreateBitCast(ExtElt->getVectorOperand(),
NewVecType, "bc");
return ExtractElementInst::Create(NewBC, ExtElt->getIndexOperand());
auto *NewVecType =
VectorType::get(DestType, cast<VectorType>(VecOp->getType()));
auto *NewBC = IC.Builder.CreateBitCast(VecOp, NewVecType, "bc");
return ExtractElementInst::Create(NewBC, Index);
}
/// Change the type of a bitwise logic operation if we can eliminate a bitcast.