commit e7b71e08c1a373dda8c77e745c8a838c8a50c588
author Simon Pilgrim <llvm-dev@redking.me.uk> Tue Apr 16 19:27:00 2019 +0000
committer Simon Pilgrim <llvm-dev@redking.me.uk> Tue Apr 16 19:27:00 2019 +0000
tree 45437a9d1cb5e76991f8ac94f39946fbe74759f0
parent c8dddc8fe03675b0d154bfa522995b5226370ee8

[SLP] Refactoring of the operand reordering code.

This is a refactoring patch which should have all the functionality of the current code. Its goal is twofold:
i. Cleanup and simplify the reordering code, and
ii. Generalize reordering so that it will work for an arbitrary number of operands, not just 2.

This is the second patch in a series of patches that will enable operand reordering across chains of operations. An example of this was presented in EuroLLVM'18 https://www.youtube.com/watch?v=gIEn34LvyNo .

Committed on behalf of @vporpo (Vasileios Porpodas)

Differential Revision: https://reviews.llvm.org/D59973

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@358519 91177308-0d34-0410-b5e6-96231b3b80d8