[PATCH] D62663: [DAGCombine] Use FoldConstantArithmetic() to perform C2-(A+C1) -> (C2-C1)-A fold
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Thu May 30 12:25:18 PDT 2019
This revision was automatically updated to reflect the committed changes.
Closed by commit rL362132: [DAGCombine] Use FoldConstantArithmetic() to perform C2-(A+C1) -> (C2-C1)-A fold (authored by lebedevri, committed by ).
Changed prior to commit:
https://reviews.llvm.org/D62663?vs=202182&id=202271#toc
Repository:
rL LLVM
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D62663/new/
https://reviews.llvm.org/D62663
Files:
llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
Index: llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
===================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -2868,7 +2868,9 @@
SDValue N11 = N1.getOperand(1);
if (isConstantOrConstantVector(N0, /* NoOpaques */ true) &&
isConstantOrConstantVector(N11, /* NoOpaques */ true)) {
- SDValue NewC = DAG.getNode(ISD::SUB, DL, VT, N0, N11);
+ SDValue NewC = DAG.FoldConstantArithmetic(ISD::SUB, DL, VT, N0.getNode(),
+ N11.getNode());
+ assert(NewC && "Constant folding failed");
return DAG.getNode(ISD::SUB, DL, VT, NewC, N1.getOperand(0));
}
}
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