Changes in directory llvm/lib/CodeGen/SelectionDAG:
LegalizeDAG.cpp updated: 1.390 -> 1.391
---
Log message:
Allow targets to custom lower expanded BIT_CONVERT's
---
Diffs of the changes: (+15 -2)
LegalizeDAG.cpp | 17 +++++++++++++++--
1 files changed, 15 insertions(+), 2 deletions(-)
Index: llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
diff -u llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.390
llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.391
--- llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.390 Fri Sep 1 13:17:58 2006
+++ llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp Fri Sep 8 19:20:27 2006
@@ -4457,8 +4457,21 @@
break;
case ISD::BIT_CONVERT: {
- SDOperand Tmp = ExpandBIT_CONVERT(Node->getValueType(0),
- Node->getOperand(0));
+ SDOperand Tmp;
+ if (TLI.getOperationAction(ISD::BIT_CONVERT, VT) ==
TargetLowering::Custom){
+ // If the target wants to, allow it to lower this itself.
+ switch (getTypeAction(Node->getOperand(0).getValueType())) {
+ case Expand: assert(0 && "cannot expand FP!");
+ case Legal: Tmp = LegalizeOp(Node->getOperand(0)); break;
+ case Promote: Tmp = PromoteOp (Node->getOperand(0)); break;
+ }
+ Tmp = TLI.LowerOperation(DAG.getNode(ISD::BIT_CONVERT, VT, Tmp), DAG);
+ }
+
+ // Turn this into a load/store pair by default.
+ if (Tmp.Val == 0)
+ Tmp = ExpandBIT_CONVERT(Node->getValueType(0), Node->getOperand(0));
+
ExpandOp(Tmp, Lo, Hi);
break;
}
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