[PATCH] D64983: [Loop Peeling] Introduce an option for full peeling disabling

[Serguei Katkov via Phabricator via llvm-commits]

skatkov created this revision.
skatkov added reviewers: reames, fhahn.
Herald added subscribers: dmgreen, zzheng, hiraditya.
Herald added a project: LLVM.

This patch adds an ability to disable profile based peeling 
causing the full peeling and as a result prohibits further unroll/peeling
attempts on that loop.

The motivation to get an ability to separate peeling usage in
pipeline where in the first part we peel only separate iterations if needed
and later in pipeline we apply the full peeling which will prohibit further peeling.


https://reviews.llvm.org/D64983

Files:
  llvm/include/llvm/Transforms/Scalar/LoopUnrollPass.h
  llvm/include/llvm/Transforms/Utils/UnrollLoop.h
  llvm/lib/Passes/PassBuilder.cpp
  llvm/lib/Transforms/Scalar/LoopUnrollAndJamPass.cpp
  llvm/lib/Transforms/Scalar/LoopUnrollPass.cpp
  llvm/test/Transforms/LoopUnroll/peel-loop-pgo-deopt.ll

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