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[X86] Add a TODO about v8i1 CONCAT_VECTORS. 

llvm-svn: 320784
This commit is contained in:
Craig Topper 2017-12-15 01:03:46 +00:00
parent 23951ec2cd
commit 1a1e6d6cf6
1 changed files with 3 additions and 0 deletions
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3
llvm/lib/Target/X86/X86ISelLowering.cpp
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@ -1538,6 +1538,9 @@ X86TargetLowering::X86TargetLowering(const X86TargetMachine &TM,
setOperationAction(ISD::VECTOR_SHUFFLE, VT, Custom);
}
// TODO: v8i1 concat should be legal without VLX to support concats of
// v1i1, but we won't legalize it correctly currently without introducing
// a v4i1 concat in the middle.
setOperationAction(ISD::CONCAT_VECTORS, MVT::v8i1, Custom);
setOperationAction(ISD::CONCAT_VECTORS, MVT::v4i1, Custom);
setOperationAction(ISD::INSERT_SUBVECTOR, MVT::v4i1, Custom);