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| author | Bill Wendling <isanbard@gmail.com> | 2008-09-07 11:34:47 +0000 |
|---|---|---|
| committer | Bill Wendling <isanbard@gmail.com> | 2008-09-07 11:34:47 +0000 |
| commit | ca460d5a39e09836e279405b85e2390fa7e7d859 (patch) | |
| tree | fbcaa3d239634a900b0475748b1ccaab83c80032 /lib/CodeGen/SelectionDAG/DAGCombiner.cpp | |
| parent | c7e4c4dd3a3b34142629ba2ae14b9a503ad3f3de (diff) | |
Convert
// fold (sub c1, c2) -> c1-c2
from a no-op into an actual transformation.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55886 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/SelectionDAG/DAGCombiner.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index 2d400bdfb2..4e4984789b 100644 --- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -1111,7 +1111,7 @@ SDValue DAGCombiner::visitSUB(SDNode *N) { return DAG.getConstant(0, N->getValueType(0)); // fold (sub c1, c2) -> c1-c2 if (N0C && N1C) - return DAG.getNode(ISD::SUB, VT, N0, N1); + return DAG.getConstant(N0C->getAPIntValue() - N1C->getAPIntValue(), VT); // fold (sub x, c) -> (add x, -c) if (N1C) return DAG.getNode(ISD::ADD, VT, N0, |