John Brawn 49e61d90ca [AArch64] Do 64-bit vector move of 0 and -1 by extracting from the 128-bit move ...

Currently a vector move of 0 or -1 will use different instructions depending on
the size of the vector. Using a single instruction (the 128-bit one) for both
gives more opportunity for Machine CSE to eliminate instructions.

Differential Revision: https://reviews.llvm.org/D53579

llvm-svn: 345270

2018-10-25 14:56:48 +00:00

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