[PATCH] D48236: [IR] move shuffle mask queries from TTI to ShuffleVectorInst

[Sanjay Patel via Phabricator via llvm-commits]

spatel created this revision.
spatel added reviewers: RKSimon, lebedev.ri, efriedma, craig.topper.
Herald added a subscriber: mcrosier.

The optimizer is getting smarter (eg, https://reviews.llvm.org/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 (https://reviews.llvm.org/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.


https://reviews.llvm.org/D48236

Files:
  include/llvm/IR/Instructions.h
  lib/Analysis/TargetTransformInfo.cpp
  lib/IR/Instructions.cpp
  unittests/IR/InstructionsTest.cpp

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