[PATCH] D132423: [BOLT] Fragment all blocks (not just outlineable blocks)

[Fabian Parzefall via Phabricator via llvm-commits]

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To enable split strategies that require view of the entire CFG (e.g. to
estimate cost of path from entry block), with this patch, all blocks of
a function are passed to `SplitStrategy::fragment`. Because this might
move non-outlineable blocks into a split fragment, these blocks are
moved back into the main fragment after fragmenting. This also gives
strategies the option to specify, whether empty fragments should be
kept or removed.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D132423

Files:
  bolt/include/bolt/Passes/SplitFunctions.h
  bolt/lib/Passes/SplitFunctions.cpp

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