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Peter Collingbourne 4564ed1430 Revert r324557, "gold-plugin: Do not set codegen opt level based on LTO opt level." 
It was reported that this change measurably regressed -plugin-opt=O3
performance.

There is an ongoing discussion on llvm-dev about the correct way to
set the CG opt level, see thread "[llvm-dev] [RFC] Adding function
attributes to represent codegen optimization level".

llvm-svn: 329458
 		2018-04-06 21:14:33 +00:00
..
CMakeLists.txt gold/CMakeLists.txt: Prune (-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64). 2017-07-31 00:39:22 +00:00
README.txt
…
gold-plugin.cpp Revert r324557, "gold-plugin: Do not set codegen opt level based on LTO opt level." 2018-04-06 21:14:33 +00:00
gold.exports
…

README.txt 

The LLVM Gold LTO Plugin
========================

This directory contains a plugin that is designed to work with binutils
gold linker. At present time, this is not the default linker in
binutils, and the default build of gold does not support plugins.

See docs/GoldPlugin.html for complete build and usage instructions.

NOTE: libLTO and LLVMgold aren't built without PIC because they would fail
to link on x86-64 with a relocation error: PIC and non-PIC can't be combined.
As an alternative to passing --enable-pic, you can use 'make ENABLE_PIC=1' in
your entire LLVM build.