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Fix the expansion for CONCAT_VECTORS so that it doesn't create illegal 

types.

llvm-svn: 72993
This commit is contained in:
Eli Friedman 2009-06-06 07:08:26 +00:00
parent aee3f62b75
commit c61e357aa6
2 changed files with 9 additions and 17 deletions
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18
llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
View File

@ -2460,23 +2460,7 @@ void SelectionDAGLegalize::ExpandNode(SDNode *Node,
Results.push_back(ExpandExtractFromVectorThroughStack(SDValue(Node, 0)));
break;
case ISD::CONCAT_VECTORS: {
// Use extract/insert/build vector for now. We might try to be
// more clever later.
SmallVector<SDValue, 8> Ops;
unsigned NumOperands = Node->getNumOperands();
for (unsigned i=0; i < NumOperands; ++i) {
SDValue SubOp = Node->getOperand(i);
MVT VVT = SubOp.getNode()->getValueType(0);
MVT EltVT = VVT.getVectorElementType();
unsigned NumSubElem = VVT.getVectorNumElements();
for (unsigned j=0; j < NumSubElem; ++j) {
Ops.push_back(DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, EltVT, SubOp,
DAG.getIntPtrConstant(j)));
}
}
Tmp1 = DAG.getNode(ISD::BUILD_VECTOR, dl, Node->getValueType(0),
&Ops[0], Ops.size());
Results.push_back(Tmp1);
Results.push_back(ExpandVectorBuildThroughStack(Node));
break;
}
case ISD::SCALAR_TO_VECTOR:

8
llvm/test/CodeGen/X86/2009-06-06-ConcatVectors.ll Normal file
View File

@ -0,0 +1,8 @@
; RUN: llvm-as < %s | llc
define <2 x i64> @_mm_movpi64_pi64(<1 x i64> %a, <1 x i64> %b) nounwind readnone {
entry:
%0 = shufflevector <1 x i64> %a, <1 x i64> %b, <2 x i32> <i32 0, i32 1>
ret <2 x i64> %0
}