Separate the check for blend shuffle_vector masks
Summary:
Separate the check for blend shuffle_vector masks into isBlendMask.
This function will also be used to check if a vector shuffle is legal. No
change in functionality was intended, but we ended up improving codegen on
two tests, which were being (more) optimized only if the resulting shuffle
was legal.
Reviewers: nadav, delena, andreadb
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D3964
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209923
91177308-0d34-0410-b5e6-
96231b3b80d8