[all-commits] [llvm/llvm-project] c931ff: [lld-macho] Add LTO cache support

[Leonard Grey via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c931ff72bde42846db4530893a94c044879c5ae9
      https://github.com/llvm/llvm-project/commit/c931ff72bde42846db4530893a94c044879c5ae9
  Author: Leonard Grey <lgrey at chromium.org>
  Date:   2021-07-15 (Thu, 15 Jul 2021)

  Changed paths:
    M lld/MachO/Config.h
    M lld/MachO/Driver.cpp
    M lld/MachO/LTO.cpp
    M lld/MachO/LTO.h
    M lld/MachO/Options.td
    A lld/test/MachO/lto-cache.ll

  Log Message:
  -----------
  [lld-macho] Add LTO cache support

This adds support for the lld-only `--thinlto-cache-policy` option, as well as
implementations for ld64's `-cache_path_lto`, `-prune_interval_lto`,
`-prune_after_lto`, and `-max_relative_cache_size_lto`.

Test is adapted from lld/test/ELF/lto/cache.ll

Differential Revision: https://reviews.llvm.org/D105922