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[SLP] Avoid getPointerElementType() call 

Use the load result type instead of the element type of the load
pointer operand.
This commit is contained in:
Nikita Popov 2021-12-13 15:45:40 +01:00
parent 529e03ea65
commit 432c41ebe9
1 changed files with 3 additions and 3 deletions
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6
llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
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@ -5222,15 +5222,15 @@ static bool isLoadCombineCandidateImpl(Value *Root, unsigned NumElts,
FoundOr = true;
}
// Check if the input is an extended load of the required or/shift expression.
Value *LoadPtr;
Value *Load;
if ((MustMatchOrInst && !FoundOr) || ZextLoad == Root ||
!match(ZextLoad, m_ZExt(m_Load(m_Value(LoadPtr)))))
!match(ZextLoad, m_ZExt(m_Value(Load))) || !isa<LoadInst>(Load))
return false;
// Require that the total load bit width is a legal integer type.
// For example, <8 x i8> --> i64 is a legal integer on a 64-bit target.
// But <16 x i8> --> i128 is not, so the backend probably can't reduce it.
Type *SrcTy = LoadPtr->getType()->getPointerElementType();
Type *SrcTy = Load->getType();
unsigned LoadBitWidth = SrcTy->getIntegerBitWidth() * NumElts;
if (!TTI->isTypeLegal(IntegerType::get(Root->getContext(), LoadBitWidth)))
return false;