diff options
Diffstat (limited to 'lib/CodeGen/SelectionDAG/SelectionDAG.cpp')
-rw-r--r-- | lib/CodeGen/SelectionDAG/SelectionDAG.cpp | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp index 823e77850c4b..0ff154784f68 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp @@ -7262,22 +7262,23 @@ void SelectionDAG::TransferDbgValues(SDValue From, SDValue To) { AddDbgValue(I, ToNode, false); } -void SelectionDAG::makeEquivalentMemoryOrdering(LoadSDNode *OldLoad, - SDValue NewMemOp) { +SDValue SelectionDAG::makeEquivalentMemoryOrdering(LoadSDNode *OldLoad, + SDValue NewMemOp) { assert(isa<MemSDNode>(NewMemOp.getNode()) && "Expected a memop node"); - if (!OldLoad->hasAnyUseOfValue(1)) - return; - // The new memory operation must have the same position as the old load in // terms of memory dependency. Create a TokenFactor for the old load and new // memory operation and update uses of the old load's output chain to use that // TokenFactor. SDValue OldChain = SDValue(OldLoad, 1); SDValue NewChain = SDValue(NewMemOp.getNode(), 1); + if (!OldLoad->hasAnyUseOfValue(1)) + return NewChain; + SDValue TokenFactor = getNode(ISD::TokenFactor, SDLoc(OldLoad), MVT::Other, OldChain, NewChain); ReplaceAllUsesOfValueWith(OldChain, TokenFactor); UpdateNodeOperands(TokenFactor.getNode(), OldChain, NewChain); + return TokenFactor; } //===----------------------------------------------------------------------===// |