commit 42f462a39249bac9cf0ace5508ed2d68e4e1ebd7
author Sanjay Patel <spatel@rotateright.com> Tue Jun 19 18:44:00 2018 +0000
committer Sanjay Patel <spatel@rotateright.com> Tue Jun 19 18:44:00 2018 +0000
tree 1eae91d033e60ee505623c039836b75858c9bd9c
parent dfd20c4090946f543b03148bde9132195c8a7dac

[IR] move shuffle mask queries from TTI to ShuffleVectorInst

The optimizer is getting smarter (eg, D47986) about differentiating shuffles 
based on its mask values, so we should make queries on the mask constant 
operand generally available to avoid code duplication.

We'll probably use this soon in the vectorizers and instcombine (D48023 and 
https://bugs.llvm.org/show_bug.cgi?id=37806).

We might clean up TTI a bit more once all of its current 'SK_*' options are 
covered.

Differential Revision: https://reviews.llvm.org/D48236


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@335067 91177308-0d34-0410-b5e6-96231b3b80d8