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| author | Simon Pilgrim <llvm-dev@redking.me.uk> | 2018-01-23 15:51:03 +0000 |
|---|---|---|
| committer | Simon Pilgrim <llvm-dev@redking.me.uk> | 2018-01-23 15:51:03 +0000 |
| commit | 0c9f77a9f96f5d2368fe2cd2c6c7f7e5c8bf54d6 (patch) | |
| tree | 73b8aac652adcae86927e43140009e0b1fda0bc4 /llvm/lib | |
| parent | 347921a28157daf87acfcb31ce4787a46bd7ad12 (diff) | |
| download | bcm5719-llvm-0c9f77a9f96f5d2368fe2cd2c6c7f7e5c8bf54d6.tar.gz bcm5719-llvm-0c9f77a9f96f5d2368fe2cd2c6c7f7e5c8bf54d6.zip | |
[X86][SSE] LowerBUILD_VECTORAsVariablePermute - ensure that the source vector is not larger than the destination
We might be able to support this in the future with VPERMV3, OR(PSHUFB, PSHUFB) etc.
llvm-svn: 323210
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelLowering.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp index 952a937ddef..0e8766b75b5 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -7924,7 +7924,9 @@ LowerBUILD_VECTORAsVariablePermute(SDValue V, SelectionDAG &DAG, MVT IndicesVT = EVT(VT).changeVectorElementTypeToInteger().getSimpleVT(); IndicesVec = DAG.getZExtOrTrunc(IndicesVec, SDLoc(IndicesVec), IndicesVT); - if (SrcVec.getValueSizeInBits() < IndicesVT.getSizeInBits()) { + if (SrcVec.getValueSizeInBits() > IndicesVT.getSizeInBits()) + return SDValue(); + else if (SrcVec.getValueSizeInBits() < IndicesVT.getSizeInBits()) { SrcVec = DAG.getNode(ISD::INSERT_SUBVECTOR, SDLoc(SrcVec), VT, DAG.getUNDEF(VT), SrcVec, DAG.getIntPtrConstant(0, SDLoc(SrcVec))); |
