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Don't create indexed load / store with zero offset!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36716 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -3110,6 +3110,10 @@ bool DAGCombiner::CombineToPreIndexedLoadStore(SDNode *N) {
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ISD::MemIndexedMode AM = ISD::UNINDEXED;
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if (!TLI.getPreIndexedAddressParts(N, BasePtr, Offset, AM, DAG))
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return false;
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// Don't create a indexed load / store with zero offset.
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if (isa<ConstantSDNode>(Offset) &&
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cast<ConstantSDNode>(Offset)->getValue() == 0)
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return false;
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// Try turning it into a pre-indexed load / store except when:
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// 1) The base is a frame index.
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@ -3239,6 +3243,10 @@ bool DAGCombiner::CombineToPostIndexedLoadStore(SDNode *N) {
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std::swap(BasePtr, Offset);
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if (Ptr != BasePtr)
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continue;
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// Don't create a indexed load / store with zero offset.
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if (isa<ConstantSDNode>(Offset) &&
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cast<ConstantSDNode>(Offset)->getValue() == 0)
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continue;
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// Try turning it into a post-indexed load / store except when
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// 1) All uses are load / store ops that use it as base ptr.
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