[PATCH] D11605: [LoopUnswitch] Add block frequency analysis to recognize hot/cold regions

[Chen Li via llvm-commits]

chenli updated this revision to Diff 32087.
chenli added a comment.

Update patch to fix the following issues:

1. Use standalone BFI without relying on the wrapper pass.
2. Use the hottest block (loop header in this case) to determine the loop's hotness.
3. Update the non-trivial condition test case to have effect of code growth.

I also plan to have a follow-up patch to introduce function_entry_count to hot/cold region detection.


http://reviews.llvm.org/D11605

Files:
  lib/Transforms/Scalar/LoopUnswitch.cpp
  test/Transforms/LoopUnswitch/cold-loop.ll

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