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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31473 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2006-11-06 08:14:30 +00:00
parent 5fa39df5ba
commit 3ef554d2b1
1 changed files with 10 additions and 4 deletions
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14
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -174,7 +174,13 @@ namespace {
return true;
}
bool CombineToIndexedLoadStore(SDNode *N) {
/// CombineToPreIndexedLoadStore - Try turning a load / store into a
/// pre-indexed load store when the base pointer is a add or subtract
/// and it has other uses besides the load / store. When the
/// transformation is done, the new indexed load / store effectively
/// folded the add / subtract in and all of its other uses are redirected
/// to the new load / store.
bool CombineToPreIndexedLoadStore(SDNode *N) {
bool isLoad = true;
SDOperand Ptr;
if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) {
@ -811,7 +817,7 @@ SDOperand DAGCombiner::visitADD(SDNode *N) {
return DAG.getNode(ISD::OR, VT, N0, N1);
}
}
return SDOperand();
}
@ -2871,7 +2877,7 @@ SDOperand DAGCombiner::visitLOAD(SDNode *N) {
}
// Try transforming N to an indexed load.
if (CombineToIndexedLoadStore(N))
if (CombineToPreIndexedLoadStore(N))
return SDOperand(N, 0);
return SDOperand();
@ -2917,7 +2923,7 @@ SDOperand DAGCombiner::visitSTORE(SDNode *N) {
}
// Try transforming N to an indexed store.
if (CombineToIndexedLoadStore(N))
if (CombineToPreIndexedLoadStore(N))
return SDOperand(N, 0);
return SDOperand();