Changes in directory llvm/lib/CodeGen/SelectionDAG:
LegalizeDAG.cpp updated: 1.341 -> 1.342
---
Log message:
Teach Legalize how to pack VVECTOR_SHUFFLE nodes into VECTOR_SHUFFLE nodes.
---
Diffs of the changes: (+21 -0)
LegalizeDAG.cpp | 21 +++++++++++++++++++++
1 files changed, 21 insertions(+)
Index: llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
diff -u llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.341
llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.342
--- llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.341 Mon Mar 27 18:40:09 2006
+++ llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp Tue Mar 28 14:24:43 2006
@@ -4532,6 +4532,27 @@
Node->getOperand(1), Node->getOperand(2));
}
break;
+ case ISD::VVECTOR_SHUFFLE:
+ if (!MVT::isVector(NewVT)) {
+ // Returning a scalar? Figure out if it is the LHS or RHS and return it.
+ SDOperand EltNum = Node->getOperand(2).getOperand(0);
+ if (cast<ConstantSDNode>(EltNum)->getValue())
+ Result = PackVectorOp(Node->getOperand(1), NewVT);
+ else
+ Result = PackVectorOp(Node->getOperand(0), NewVT);
+ } else {
+ // Otherwise, return a VECTOR_SHUFFLE node. First convert the index
+ // vector from a VBUILD_VECTOR to a BUILD_VECTOR.
+ std::vector<SDOperand> BuildVecIdx(Node->getOperand(2).Val->op_begin(),
+ Node->getOperand(2).Val->op_end()-2);
+ MVT::ValueType BVT =
MVT::getIntVectorWithNumElements(BuildVecIdx.size());
+ SDOperand BV = DAG.getNode(ISD::BUILD_VECTOR, BVT, BuildVecIdx);
+
+ Result = DAG.getNode(ISD::VECTOR_SHUFFLE, NewVT,
+ PackVectorOp(Node->getOperand(0), NewVT),
+ PackVectorOp(Node->getOperand(1), NewVT), BV);
+ }
+ break;
case ISD::VBIT_CONVERT:
if (Op.getOperand(0).getValueType() != MVT::Vector)
Result = DAG.getNode(ISD::BIT_CONVERT, NewVT, Op.getOperand(0));
_______________________________________________
llvm-commits mailing list
llvm-commits@cs.uiuc.edu
http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits
