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Don't fold bitconvert(load) for preinc/postdec loads. Likewise stores.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37130 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -2685,6 +2685,7 @@ SDOperand DAGCombiner::visitBIT_CONVERT(SDNode *N) {
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// fold (conv (load x)) -> (load (conv*)x)
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// If the resultant load doesn't need a higher alignment than the original!
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if (ISD::isNON_EXTLoad(N0.Val) && N0.hasOneUse() &&
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ISD::isUNINDEXEDLoad(N0.Val) &&
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TLI.isOperationLegal(ISD::LOAD, VT)) {
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LoadSDNode *LN0 = cast<LoadSDNode>(N0);
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unsigned Align = TLI.getTargetMachine().getTargetData()->
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@ -3563,7 +3564,8 @@ SDOperand DAGCombiner::visitSTORE(SDNode *N) {
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// If this is a store of a bit convert, store the input value if the
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// resultant store does not need a higher alignment than the original.
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if (Value.getOpcode() == ISD::BIT_CONVERT && !ST->isTruncatingStore()) {
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if (Value.getOpcode() == ISD::BIT_CONVERT && !ST->isTruncatingStore() &&
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ST->getAddressingMode() == ISD::UNINDEXED) {
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unsigned Align = ST->getAlignment();
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MVT::ValueType SVT = Value.getOperand(0).getValueType();
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unsigned OrigAlign = TLI.getTargetMachine().getTargetData()->
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