Changes in directory llvm/lib/CodeGen/SelectionDAG:
LegalizeDAG.cpp updated: 1.322 -> 1.323
---
Log message:
Don't bother storing undef elements of BUILD_VECTOR's
---
Diffs of the changes: (+9 -1)
LegalizeDAG.cpp | 10 +++++++++-
1 files changed, 9 insertions(+), 1 deletion(-)
Index: llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
diff -u llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.322
llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.323
--- llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.322 Sat Mar 18 22:18:56 2006
+++ llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp Sat Mar 18 23:46:04 2006
@@ -794,6 +794,9 @@
unsigned VectorSize = MVT::getSizeInBits(VT)/8;
// Store (in the right endianness) the elements to memory.
for (unsigned i = 0, e = Node->getNumOperands(); i != e; ++i) {
+ // Ignore undef elements.
+ if (Node->getOperand(i).getOpcode() == ISD::UNDEF) continue;
+
unsigned Offset;
if (isLittleEndian)
Offset = TypeByteSize*i;
@@ -807,7 +810,12 @@
Node->getOperand(i), Idx,
DAG.getSrcValue(NULL)));
}
- SDOperand StoreChain = DAG.getNode(ISD::TokenFactor, MVT::Other, Stores);
+
+ SDOperand StoreChain;
+ if (!Stores.empty()) // Not all undef elements?
+ StoreChain = DAG.getNode(ISD::TokenFactor, MVT::Other, Stores);
+ else
+ StoreChain = DAG.getEntryNode();
// Result is a load from the stack slot.
Result = DAG.getLoad(VT, StoreChain, FIPtr, DAG.getSrcValue(0));
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