Make isScalarToVector to return false if the node is a scalar. This will prevent
DAGCombine from making an illegal transformation of bitcast of a scalar to a
vector into a scalar_to_vector.
llvm-svn: 119819
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index 08ef505..82a1746 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -199,6 +199,8 @@
if (N->getOperand(0).getOpcode() == ISD::UNDEF)
return false;
unsigned NumElems = N->getNumOperands();
+ if (NumElems == 1)
+ return false;
for (unsigned i = 1; i < NumElems; ++i) {
SDValue V = N->getOperand(i);
if (V.getOpcode() != ISD::UNDEF)