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Revert patch ofr218493

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218494 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Xu 2014-09-26 02:28:03 +00:00
parent c41ae2a5c4
commit 2109982c88
1 changed files with 0 additions and 14 deletions
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14
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -9799,20 +9799,6 @@ SDValue DAGCombiner::visitSTORE(SDNode *N) {
return Chain;
}
}
// If this is a store followed by a store with the same value to the same
// location, then the store is dead/noop.
if (StoreSDNode *ST1 = dyn_cast<StoreSDNode>(Chain)) {
if (ST1->getBasePtr() == Ptr && ST->getMemoryVT() == ST1->getMemoryVT() &&
ST1->getValue() == Value && ST->isUnindexed() && !ST->isVolatile() &&
ST1->isUnindexed() &&
!ST1->isVolatile() &&
// There can't be any side effects between the two stores, such as
// a call or store.
Chain.reachesChainWithoutSideEffects(SDValue(ST1, 0))) {
// The store is dead, remove it.
return Chain;
}
}
// If this is an FP_ROUND or TRUNC followed by a store, fold this into a
// truncating store. We can do this even if this is already a truncstore.