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History

Teresa Johnson e24ec3840e [ThinLTO] Prevent importing of "llvm.used" values Summary: This patch prevents importing from (and therefore exporting from) any module with a "llvm.used" local value. Local values need to be promoted and renamed when importing, and their presense on the llvm.used variable indicates that there are opaque uses that won't see the rename. One such example is a use in inline assembly. See also the discussion at: http://lists.llvm.org/pipermail/llvm-dev/2016-April/098047.html As part of this, move collectUsedGlobalVariables out of Transforms/Utils and into IR/Module so that it can be used more widely. There are several other places in LLVM that used copies of this code that can be cleaned up as a follow on NFC patch. Reviewers: joker.eph Subscribers: pcc, llvm-commits, joker.eph Differential Revision: http://reviews.llvm.org/D18986 llvm-svn: 266877		2016-04-20 14:39:45 +00:00
..
CMakeLists.txt	[gold] Consolidate the gold plugin options and actually search for	2015-02-14 09:43:57 +00:00
gold-plugin.cpp	[ThinLTO] Prevent importing of "llvm.used" values	2016-04-20 14:39:45 +00:00
gold.exports	Create an exports file, so that the plugin only exports the onload symbol.	2010-04-16 00:43:25 +00:00
README.txt	Cut the gold plugin README down to size	2013-12-02 14:17:47 +00:00

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.