Changes in directory llvm/lib/CodeGen/SelectionDAG:
DAGCombiner.cpp updated: 1.104 -> 1.105
---
Log message:
Don't expand sdiv by power of two before legalize, since it will likely
generate illegal nodes.
---
Diffs of the changes: (+2 -2)
DAGCombiner.cpp | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
Index: llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
diff -u llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:1.104
llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:1.105
--- llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:1.104 Thu Feb 16 23:43:56 2006
+++ llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp Fri Feb 17 01:26:20 2006
@@ -731,8 +731,8 @@
if (TLI.MaskedValueIsZero(N1, SignBit) &&
TLI.MaskedValueIsZero(N0, SignBit))
return DAG.getNode(ISD::UDIV, N1.getValueType(), N0, N1);
- // fold (sdiv X, pow2) -> simple ops.
- if (N1C && N1C->getValue() && !TLI.isIntDivCheap() &&
+ // fold (sdiv X, pow2) -> simple ops after legalize
+ if (N1C && N1C->getValue() && !TLI.isIntDivCheap() && AfterLegalize &&
(isPowerOf2_64(N1C->getSignExtended()) ||
isPowerOf2_64(-N1C->getSignExtended()))) {
// If dividing by powers of two is cheap, then don't perform the following
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