[all-commits] [llvm/llvm-project] 700f93: [RDA] Switch isSafeToMove iterators

[Sam Parker via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 700f93e92b6d4cdbab66133f75c143c9677f2d41
      https://github.com/llvm/llvm-project/commit/700f93e92b6d4cdbab66133f75c143c9677f2d41
  Author: Sam Parker <sam.parker at arm.com>
  Date:   2020-09-30 (Wed, 30 Sep 2020)

  Changed paths:
    M llvm/lib/CodeGen/ReachingDefAnalysis.cpp
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/it-block-mov.mir
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/lstp-insertion-position.mir
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/mov-operand.ll
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/move-def-before-start.mir
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/move-start-after-def.mir

  Log Message:
  -----------
  [RDA] Switch isSafeToMove iterators

So forwards is forwards and backwards is reverse. Also add a check
so that we know the instructions are in the expected order.

Differential Revision: https://reviews.llvm.org/D88419