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[DAGCombiner] convert if-chain in store merging to switch; NFC

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This commit is contained in:
Sanjay Patel 2020-07-09 11:53:51 -04:00
parent 8c5ccbb984
commit 81806c24bf
1 changed files with 14 additions and 11 deletions
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25
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -16773,7 +16773,7 @@ bool DAGCombiner::mergeConsecutiveStores(StoreSDNode *St) {
// Do not bother looking at stored values that are not constants, loads, or
// extracted vector elements.
SDValue StoredVal = peekThroughBitcasts(St->getValue());
StoreSource StoreSrc = getStoreSource(StoredVal);
const StoreSource StoreSrc = getStoreSource(StoredVal);
if (StoreSrc == StoreSource::Unknown)
return false;
@ -16815,22 +16815,25 @@ bool DAGCombiner::mergeConsecutiveStores(StoreSDNode *St) {
// We have at least 2 consecutive stores. Try to merge them.
assert(NumConsecutiveStores >= 2 && "Expected at least 2 stores");
if (StoreSrc == StoreSource::Constant) {
switch (StoreSrc) {
case StoreSource::Constant:
MadeChange |= tryStoreMergeOfConstants(StoreNodes, NumConsecutiveStores,
MemVT, RootNode, AllowVectors);
continue;
}
if (StoreSrc == StoreSource::Extract) {
break;
case StoreSource::Extract:
MadeChange |= tryStoreMergeOfExtracts(StoreNodes, NumConsecutiveStores,
MemVT, RootNode);
continue;
}
if (StoreSrc == StoreSource::Load) {
break;
case StoreSource::Load:
MadeChange |= tryStoreMergeOfLoads(StoreNodes, NumConsecutiveStores,
MemVT, RootNode, AllowVectors,
IsNonTemporalStore,
IsNonTemporalLoad);
continue;
IsNonTemporalStore, IsNonTemporalLoad);
break;
default:
llvm_unreachable("Unhandled store source type");
}
}
return MadeChange;