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core corrections

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30570 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Laskey 2006-09-21 17:35:47 +00:00
parent c7cfbc58ad
commit 516b0eacff
1 changed files with 4 additions and 10 deletions
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14
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -46,13 +46,9 @@ namespace {
"Number of dag nodes combined");
#ifndef NDEBUG
static cl::opt<bool>
CombinerAA("combiner-alias-analysis", cl::Hidden,
cl::desc("Turn on alias analysis turning testing"));
#else
static const bool CombinerAA = 0;
#endif
class VISIBILITY_HIDDEN DAGCombiner {
SelectionDAG &DAG;
@ -2594,14 +2590,14 @@ bool DAGCombiner::isNotAlias(SDOperand Ptr1, SDOperand Ptr2) {
// Mind the flag.
if (!CombinerAA) return false;
// If they are the same then they are simple aliases.
// If they are the same then they must be aliases.
if (Ptr1 == Ptr2) return false;
// If either operand is a frame value (not the same location from above test)
// If both operands are frame values (not the same location from above test)
// then they can't alias.
FrameIndexSDNode *FI1 = dyn_cast<FrameIndexSDNode>(Ptr1);
FrameIndexSDNode *FI2 = dyn_cast<FrameIndexSDNode>(Ptr2);
if (FI1 || FI2) {
if (FI1 && FI2) {
return true;
}
@ -2651,9 +2647,7 @@ SDOperand DAGCombiner::visitSTORE(SDNode *N) {
SDOperand Token = DAG.getNode(ISD::TokenFactor, MVT::Other,
Chain, ReplStore);
// Replace uses with token.
CombineTo(N, Token);
// Don't recombine on token.
return SDOperand(N, 0);
return Token;
}
return SDOperand();