[PATCH] D63440: [WIP][LoopUnroll] Enable unrolled loops to have scevable trip counts.

[Sam Parker via Phabricator via llvm-commits]

samparker updated this revision to Diff 205351.
samparker retitled this revision from "[LoopUnroll] Generate sub nuw for loop index" to "[WIP][LoopUnroll] Enable unrolled loops to have scevable trip counts.".
samparker edited the summary of this revision.
samparker added a comment.
Herald added a subscriber: javed.absar.

Currently using a mask to calculate the unrolled body test value, this looks like it solves the problem but causes regressions! Next I will try counting up with adds instead of down...


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D63440/new/

https://reviews.llvm.org/D63440

Files:
  lib/Transforms/Utils/LoopUnrollRuntime.cpp
  test/Transforms/LoopUnroll/nuw-backedge.ll
  test/Transforms/LoopUnroll/runtime-loop-multiple-exits.ll
  test/Transforms/LoopUnroll/runtime-unroll-remainder.ll
  test/Transforms/LoopUnrollAndJam/unroll-and-jam.ll
  test/Transforms/PhaseOrdering/reassociate-after-unroll.ll

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