[PATCH] D60516: [LTO] Add plumbing to save stats during LTO on MacOS.

[Florian Hahn via Phabricator via cfe-commits]

fhahn created this revision.
fhahn added reviewers: anemet, tejohnson, thegameg.
Herald added subscribers: cfe-commits, dang, dexonsmith, steven_wu, hiraditya, inglorion, mehdi_amini.
Herald added projects: clang, LLVM.

Gold and ld on Linux already support saving stats, but the
infrastructure is missing on MacOS. Unfortunately it seems like the
configuration from lib/LTO/LTO.cpp is not used.

This patch adds a new LTOStatsFile option and adds plumbing in Clang to
use it on MacOS, similar to the way remarks are handled.

Currnetly the handling of LTO flags seems quite spread out, with a bunch
of duplication. But I am not sure if there is an easy way to improve
that?


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D60516

Files:
  clang/lib/Driver/ToolChains/Darwin.cpp
  llvm/include/llvm/LTO/LTO.h
  llvm/include/llvm/LTO/legacy/LTOCodeGenerator.h
  llvm/lib/LTO/LTO.cpp
  llvm/lib/LTO/LTOCodeGenerator.cpp

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