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[DAG] Convert extload check to equivalent type check. NFC.

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Replace check with check that consuming store has the same type.

llvm-svn: 309708
This commit is contained in:
Nirav Dave 2017-08-01 17:19:41 +00:00
parent a8dd496fff
commit 4f93d4b76f
1 changed files with 10 additions and 5 deletions
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15
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -12566,9 +12566,15 @@ void DAGCombiner::getStoreMergeCandidates(
bool IsLoadSrc = isa<LoadSDNode>(St->getValue());
BaseIndexOffset LBasePtr;
// Match on loadbaseptr if relevant.
if (IsLoadSrc)
LBasePtr = BaseIndexOffset::match(
cast<LoadSDNode>(St->getValue())->getBasePtr(), DAG);
EVT LoadVT;
if (IsLoadSrc) {
auto *Ld = cast<LoadSDNode>(St->getValue());
LBasePtr = BaseIndexOffset::match(Ld->getBasePtr(), DAG);
LoadVT = Ld->getMemoryVT();
// Load and store should be the same type.
if (MemVT != LoadVT)
return;
}
auto CandidateMatch = [&](StoreSDNode *Other, BaseIndexOffset &Ptr,
int64_t &Offset) -> bool {
if (Other->isVolatile() || Other->isIndexed())
@ -12582,8 +12588,7 @@ void DAGCombiner::getStoreMergeCandidates(
// The Load's Base Ptr must also match
if (LoadSDNode *OtherLd = dyn_cast<LoadSDNode>(Other->getValue())) {
auto LPtr = BaseIndexOffset::match(OtherLd->getBasePtr(), DAG);
// We do not handle extended loads
if (OtherLd->getExtensionType() != ISD::NON_EXTLOAD)
if (LoadVT != OtherLd->getMemoryVT())
return false;
if (!(LBasePtr.equalBaseIndex(LPtr, DAG)))
return false;