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[X86][SSE] Allow matchVectorShuffleWithUNPCK to recognise UNDEF inputs
authorSimon Pilgrim <llvm-dev@redking.me.uk>
Tue, 14 Feb 2017 16:22:04 +0000 (16:22 +0000)
committerSimon Pilgrim <llvm-dev@redking.me.uk>
Tue, 14 Feb 2017 16:22:04 +0000 (16:22 +0000)
commit2fce16a04e36b219362b0022a944d829abeaafc2
tree8b0b94956f20492a56a954b260416a4dbd1dc2db
parent0ef69ab99f8f1a0213ae3d1a22bcef2d73a6b1f7
[X86][SSE] Allow matchVectorShuffleWithUNPCK to recognise UNDEF inputs

Add support for specifying an UNPCK input as UNDEF

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@295061 91177308-0d34-0410-b5e6-96231b3b80d8
lib/Target/X86/X86ISelLowering.cpp
test/CodeGen/X86/vector-shuffle-combining-avx2.ll
test/CodeGen/X86/vector-shuffle-combining-ssse3.ll