Changes in directory llvm/lib/CodeGen/SelectionDAG:
LegalizeDAG.cpp updated: 1.432 -> 1.433
---
Log message:
- When expanding a bit_convert whose src operand is also to be expanded and
its expansion result type is equal to the result type of the bit_convert,
e.g. (i64 bit_convert (f64 op)) if FP is not legal
returns the result of the expanded source operand.
- Store f32 / f64 may be expanded to a single store i32/i64.
---
Diffs of the changes: (+16 -2)
LegalizeDAG.cpp | 18 ++++++++++++++++--
1 files changed, 16 insertions(+), 2 deletions(-)
Index: llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
diff -u llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.432
llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.433
--- llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.432 Mon Dec 11 23:22:21 2006
+++ llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp Tue Dec 12 13:53:13 2006
@@ -1735,7 +1735,7 @@
}
} else {
ExpandOp(Node->getOperand(1), Lo, Hi);
- IncrementSize = MVT::getSizeInBits(Hi.getValueType())/8;
+ IncrementSize = Hi.Val ? MVT::getSizeInBits(Hi.getValueType())/8 : 0;
if (!TLI.isLittleEndian())
std::swap(Lo, Hi);
@@ -1743,6 +1743,13 @@
Lo = DAG.getStore(Tmp1, Lo, Tmp2, ST->getSrcValue(),
ST->getSrcValueOffset());
+
+ if (Hi.Val == NULL) {
+ // Must be int <-> float one-to-one expansion.
+ Result = Lo;
+ break;
+ }
+
Tmp2 = DAG.getNode(ISD::ADD, Tmp2.getValueType(), Tmp2,
getIntPtrConstant(IncrementSize));
assert(isTypeLegal(Tmp2.getValueType()) &&
@@ -4593,7 +4600,14 @@
// f32 / f64 must be expanded to i32 / i64.
if (VT == MVT::f32 || VT == MVT::f64) {
Lo = DAG.getNode(ISD::BIT_CONVERT, NVT, Node->getOperand(0));
- Hi = SDOperand();
+ break;
+ }
+
+ // If source operand will be expanded to the same type as VT, i.e.
+ // i64 <- f64, i32 <- f32, expand the source operand instead.
+ MVT::ValueType VT0 = Node->getOperand(0).getValueType();
+ if (getTypeAction(VT0) == Expand && TLI.getTypeToTransformTo(VT0) == VT) {
+ ExpandOp(Node->getOperand(0), Lo, Hi);
break;
}
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