Changes in directory llvm/lib/CodeGen/SelectionDAG:
DAGCombiner.cpp updated: 1.122 -> 1.123
---
Log message:
Reinstate this now that the offending opposite xform has been removed.
---
Diffs of the changes: (+7 -0)
DAGCombiner.cpp | 7 +++++++
1 files changed, 7 insertions(+)
Index: llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
diff -u llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:1.122
llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:1.123
--- llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:1.122 Sun Mar 5 01:30:16 2006
+++ llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp Sun Mar 5 13:53:55 2006
@@ -1454,6 +1454,13 @@
if (N1C && N0.getOpcode() == ISD::SRA && N1 == N0.getOperand(1))
return DAG.getNode(ISD::AND, VT, N0.getOperand(0),
DAG.getConstant(~0ULL << N1C->getValue(), VT));
+ // fold (shl (add x, c1), c2) -> (add (shl x, c2), c1<<c2)
+ if (N1C && N0.getOpcode() == ISD::ADD && N0.Val->hasOneUse() &&
+ isa<ConstantSDNode>(N0.getOperand(1))) {
+ return DAG.getNode(ISD::ADD, VT,
+ DAG.getNode(ISD::SHL, VT, N0.getOperand(0), N1),
+ DAG.getNode(ISD::SHL, VT, N0.getOperand(1), N1));
+ }
return SDOperand();
}
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