Changes in directory llvm/lib/CodeGen/SelectionDAG:
LegalizeDAG.cpp updated: 1.435 -> 1.436
---
Log message:
Expand FP constant to integers if FP types are not legal.
---
Diffs of the changes: (+13 -7)
LegalizeDAG.cpp | 20 +++++++++++++-------
1 files changed, 13 insertions(+), 7 deletions(-)
Index: llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
diff -u llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.435
llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.436
--- llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.435 Tue Dec 12 15:51:17 2006
+++ llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp Tue Dec 12 16:19:28 2006
@@ -488,10 +488,10 @@
}
}
-/// ExpandConstantFP - Expands the ConstantFP node by spilling the constant to
-/// memory.
-static SDOperand ExpandConstantFP(ConstantFPSDNode *CFP, SelectionDAG &DAG,
- TargetLowering &TLI) {
+/// ExpandConstantFP - Expands the ConstantFP node by either converting it to
+/// integer constant or spilling the constant to memory.
+static SDOperand ExpandConstantFP(ConstantFPSDNode *CFP, bool ToMem,
+ SelectionDAG &DAG, TargetLowering &TLI) {
bool Extend = false;
// If a FP immediate is precise when represented as a float and if the
@@ -502,6 +502,13 @@
bool isDouble = VT == MVT::f64;
ConstantFP *LLVMC = ConstantFP::get(isDouble ? Type::DoubleTy :
Type::FloatTy, CFP->getValue());
+ if (!ToMem) {
+ double Val = LLVMC->getValue();
+ return isDouble
+ ? DAG.getConstant(DoubleToBits(Val), MVT::i64)
+ : DAG.getConstant(FloatToBits(Val), MVT::i32);
+ }
+
if (isDouble && CFP->isExactlyValue((float)CFP->getValue()) &&
// Only do this if the target has a native EXTLOAD instruction from f32.
TLI.isLoadXLegal(ISD::EXTLOAD, MVT::f32)) {
@@ -806,7 +813,7 @@
}
// FALLTHROUGH
case TargetLowering::Expand:
- Result = ExpandConstantFP(CFP, DAG, TLI);
+ Result = ExpandConstantFP(CFP, true, DAG, TLI);
}
break;
}
@@ -4405,8 +4412,7 @@
}
case ISD::ConstantFP: {
ConstantFPSDNode *CFP = cast<ConstantFPSDNode>(Node);
- SDOperand Tmp = ExpandConstantFP(CFP, DAG, TLI);
- ExpandOp(Tmp, Lo, Hi);
+ Lo = ExpandConstantFP(CFP, false, DAG, TLI);
break;
}
case ISD::BUILD_PAIR:
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