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fix a case where all operands of BUILD_VECTOR are undefined

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llvm-svn: 162214
This commit is contained in:
Michael Liao 2012-08-20 17:59:18 +00:00
parent b64681df6d
commit 3d421a0c4d
2 changed files with 12 additions and 0 deletions
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4
lib/Target/X86/X86ISelLowering.cpp
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@ -5180,6 +5180,10 @@ X86TargetLowering::LowerVectorFpExtend(SDValue &Op, SelectionDAG &DAG) const {
Mask.push_back(cast<ConstantSDNode>(L2In.getOperand(1))->getZExtValue());
}
// Quit if all operands of BUILD_VECTOR are undefined.
if (!VecIn.getNode())
return SDValue();
// Fill the remaining mask as undef.
for (unsigned i = NumElts; i < VecInVT.getVectorNumElements(); ++i)
Mask.push_back(-1);

8
test/CodeGen/X86/pr11334.ll
View File

@ -54,3 +54,11 @@ entry:
%f1 = fpext <8 x float> %v1 to <8 x double>
ret <8 x double> %f1
}
define void @test_vector_creation() nounwind {
%1 = insertelement <4 x double> undef, double 0.000000e+00, i32 2
%2 = load double addrspace(1)* null
%3 = insertelement <4 x double> %1, double %2, i32 3
store <4 x double> %3, <4 x double>* undef
ret void
}