Changes in directory llvm/lib/CodeGen/SelectionDAG:
DAGCombiner.cpp updated: 1.261 -> 1.262
---
Log message:
This code was usurping the sextload expand in teh legalizer. Just make
sure the right conditions are checked.
---
Diffs of the changes: (+9 -7)
DAGCombiner.cpp | 16 +++++++++-------
1 files changed, 9 insertions(+), 7 deletions(-)
Index: llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
diff -u llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:1.261
llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:1.262
--- llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:1.261 Mon Dec 11 22:16:14 2006
+++ llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp Fri Dec 15 15:38:30 2006
@@ -1943,13 +1943,15 @@
if ((ISD::isSEXTLoad(N0.Val) || ISD::isEXTLoad(N0.Val)) && N0.hasOneUse()) {
LoadSDNode *LN0 = cast<LoadSDNode>(N0);
MVT::ValueType EVT = LN0->getLoadedVT();
- SDOperand ExtLoad = DAG.getExtLoad(ISD::SEXTLOAD, VT, LN0->getChain(),
- LN0->getBasePtr(), LN0->getSrcValue(),
- LN0->getSrcValueOffset(), EVT);
- CombineTo(N, ExtLoad);
- CombineTo(N0.Val, DAG.getNode(ISD::TRUNCATE, N0.getValueType(), ExtLoad),
- ExtLoad.getValue(1));
- return SDOperand(N, 0); // Return N so it doesn't get rechecked!
+ if (!AfterLegalize || TLI.isLoadXLegal(ISD::SEXTLOAD, EVT)) {
+ SDOperand ExtLoad = DAG.getExtLoad(ISD::SEXTLOAD, VT, LN0->getChain(),
+ LN0->getBasePtr(), LN0->getSrcValue(),
+ LN0->getSrcValueOffset(), EVT);
+ CombineTo(N, ExtLoad);
+ CombineTo(N0.Val, DAG.getNode(ISD::TRUNCATE, N0.getValueType(), ExtLoad),
+ ExtLoad.getValue(1));
+ return SDOperand(N, 0); // Return N so it doesn't get rechecked!
+ }
}
return SDOperand();
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