[PATCH] D71027: Support repeated machine outlining

[Jin Lin via Phabricator via llvm-commits]

jinlin created this revision.
jinlin added a reviewer: aschwaighofer.
Herald added subscribers: llvm-commits, hiraditya.
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The following change is to allow the machine outlining can be applied for Nth times, where N is specified by the compiler option. By default the value of N is 1. The motivation is that the repeated machine outlining can further reduce code size.  Please refer to the presentation "Improving Swift Binary Size via Link Time Optimization" in LLVM Developers' Meeting in 2019.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D71027

Files:
  llvm/lib/CodeGen/MachineOutliner.cpp
  llvm/test/CodeGen/AArch64/machine-outliner-iterative.ll

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