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Don't fold bitconvert(load) for preinc/postdec loads. Likewise stores.

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llvm-svn: 37130
This commit is contained in:
Dale Johannesen 2007-05-16 22:45:30 +00:00
parent ab88e91c81
commit cc99a6fc32
1 changed files with 3 additions and 1 deletions
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4
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -2685,6 +2685,7 @@ SDOperand DAGCombiner::visitBIT_CONVERT(SDNode *N) {
// fold (conv (load x)) -> (load (conv*)x)
// If the resultant load doesn't need a higher alignment than the original!
if (ISD::isNON_EXTLoad(N0.Val) && N0.hasOneUse() &&
ISD::isUNINDEXEDLoad(N0.Val) &&
TLI.isOperationLegal(ISD::LOAD, VT)) {
LoadSDNode *LN0 = cast<LoadSDNode>(N0);
unsigned Align = TLI.getTargetMachine().getTargetData()->
@ -3563,7 +3564,8 @@ SDOperand DAGCombiner::visitSTORE(SDNode *N) {
// If this is a store of a bit convert, store the input value if the
// resultant store does not need a higher alignment than the original.
if (Value.getOpcode() == ISD::BIT_CONVERT && !ST->isTruncatingStore()) {
if (Value.getOpcode() == ISD::BIT_CONVERT && !ST->isTruncatingStore() &&
ST->getAddressingMode() == ISD::UNINDEXED) {
unsigned Align = ST->getAlignment();
MVT::ValueType SVT = Value.getOperand(0).getValueType();
unsigned OrigAlign = TLI.getTargetMachine().getTargetData()->