[PATCH] D21665: [LoopSimplify] Update LCSSA after separating nested loops.

[Michael Zolotukhin via llvm-commits]

mzolotukhin updated this revision to Diff 62891.
mzolotukhin added a comment.

- Use SSAUpdate to properly rewrite values.
- Break edges to exit-blocks after separating loop nest if the exit block has a pred from outside the loop.
- Add Sanjoy's test.


http://reviews.llvm.org/D21665

Files:
  lib/Transforms/Utils/LoopSimplify.cpp
  test/Transforms/LoopSimplify/pr28272.ll

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