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| author | Nate Begeman <natebegeman@mac.com> | 2006-02-05 08:23:00 +0000 |
|---|---|---|
| committer | Nate Begeman <natebegeman@mac.com> | 2006-02-05 08:23:00 +0000 |
| commit | be71442292e89b2e0cca61a8ecca9997df319d93 (patch) | |
| tree | c3d1390b7ac70c1f5b33174d5606741de6777d60 /lib/CodeGen/SelectionDAG/DAGCombiner.cpp | |
| parent | bab9239d0572d35a08423782eb964e532c3c6524 (diff) | |
Back out previous commit, it isn't safe.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26006 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/SelectionDAG/DAGCombiner.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index e853db3310..853dc1420d 100644 --- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -1288,12 +1288,6 @@ SDOperand DAGCombiner::visitSHL(SDNode *N) { // fold (shl 0, x) -> 0 if (N0C && N0C->isNullValue()) return N0; - // fold (shl c1, (add x, c2)) -> (shl c1 << c2, x) - if (N0C && N1.getOpcode() == ISD::ADD && - N1.getOperand(1).getOpcode() == ISD::Constant) { - SDOperand LHS = DAG.getNode(ISD::SHL, VT, N0, N1.getOperand(1)); - return DAG.getNode(ISD::SHL, VT, LHS, N1.getOperand(0)); - } // fold (shl x, c >= size(x)) -> undef if (N1C && N1C->getValue() >= OpSizeInBits) return DAG.getNode(ISD::UNDEF, VT); |