Changes in directory llvm/lib/CodeGen/SelectionDAG:
DAGCombiner.cpp updated: 1.123 -> 1.124
---
Log message:
add a couple of missing folds
---
Diffs of the changes: (+12 -0)
DAGCombiner.cpp | 12 ++++++++++++
1 files changed, 12 insertions(+)
Index: llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
diff -u llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:1.123
llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:1.124
--- llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:1.123 Sun Mar 5 13:53:55 2006
+++ llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp Mon Mar 13 00:26:26 2006
@@ -2102,6 +2102,18 @@
// fold (fp_round c1fp) -> c1fp
if (N0CFP)
return DAG.getNode(ISD::FP_ROUND, VT, N0);
+
+ // fold (fp_round (fp_extend x)) -> x
+ if (N0.getOpcode() == ISD::FP_EXTEND && VT ==
N0.getOperand(0).getValueType())
+ return N0.getOperand(0);
+
+ // fold (fp_round (copysign X, Y)) -> (copysign (fp_round X), Y)
+ if (N0.getOpcode() == ISD::FCOPYSIGN && N0.Val->hasOneUse()) {
+ SDOperand Tmp = DAG.getNode(ISD::FP_ROUND, VT, N0.getOperand(0));
+ AddToWorkList(Tmp.Val);
+ return DAG.getNode(ISD::FCOPYSIGN, VT, Tmp, N0.getOperand(1));
+ }
+
return SDOperand();
}
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