commit 9ecb90821effbbfc6308c532990deb95edfe640e
author Nikita Popov <nikita.ppv@gmail.com> Sat Dec 01 10:58:34 2018 +0000
committer Nikita Popov <nikita.ppv@gmail.com> Sat Dec 01 10:58:34 2018 +0000
tree 9979cbc8acc25b1ec8d55b802b0b5f852b609315
parent ff433298cd82147b0aaf4c87c81eb4348ff11790

[InstCombine] Support ssub.sat canonicalization for non-splats

Extend ssub.sat(X, C) -> sadd.sat(X, -C) canonicalization to also
support non-splat vector constants. This is done by generalizing
the implementation of the isNotMinSignedValue() helper to return
true for constants that are non-splat, but don't contain any
signed min elements.

Differential Revision: https://reviews.llvm.org/D55011

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@348072 91177308-0d34-0410-b5e6-96231b3b80d8