When promoting the vector elements in CopyToParts, use vector trunc
instead of scalarizing, and doing an element-by-element truncat.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133382 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index d79a5ae..19bfa33 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -475,17 +475,9 @@
PartVT.getVectorNumElements() == ValueVT.getVectorNumElements()) {
// Promoted vector extract
- unsigned NumElts = ValueVT.getVectorNumElements();
- SmallVector<SDValue, 8> NewOps;
- for (unsigned i = 0; i < NumElts; ++i) {
- SDValue Ext = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL,
- ValueVT.getScalarType(), Val ,DAG.getIntPtrConstant(i));
- SDValue Cast = DAG.getNode(ISD::ANY_EXTEND,
- DL, PartVT.getScalarType(), Ext);
- NewOps.push_back(Cast);
- }
- Val = DAG.getNode(ISD::BUILD_VECTOR, DL, PartVT,
- &NewOps[0], NewOps.size());
+ bool Smaller = PartVT.bitsLE(ValueVT);
+ Val = DAG.getNode((Smaller ? ISD::TRUNCATE : ISD::ANY_EXTEND),
+ DL, PartVT, Val);
} else{
// Vector -> scalar conversion.
assert(ValueVT.getVectorNumElements() == 1 &&