| commit | ee929f2db80db7e09f0d5a772fb55559ab2e333b | [log] [tgz] |
|---|---|---|
| author | Fangrui Song <maskray@google.com> | Sun Sep 29 15:26:12 2019 +0000 |
| committer | Fangrui Song <maskray@google.com> | Sun Sep 29 15:26:12 2019 +0000 |
| tree | da0093ab0b1a85988c885ca93d2fe2d705332b7b | |
| parent | 2340c6a190dc74c6da330b77f6c7f415121a194c [diff] |
[MC] Emit unused undefined symbol even if its binding is not set For the following two cases, we currently suppress the symbols. This patch emits them (compatible with GNU as). * `test2_a = undef`: if `undef` is otherwise unused. * `.hidden hidden`: if `hidden` is unused. This is the main point of the patch, because omitting the symbol would cause a linker semantic difference. It causes a behavior change that is not compatible with GNU as: .weakref foo1, bar1 When neither foo1 nor bar1 is used, we now emit bar1, which is arguably more consistent. Another change is that we will emit .TOC. for .TOC.@tocbase . For this directive, suppressing .TOC. can be seen as a size optimization, but we choose to drop it for simplicity and consistency. git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@373168 91177308-0d34-0410-b5e6-96231b3b80d8
This directory and its subdirectories contain source code for the LLVM Linker, a modular cross platform linker which is built as part of the LLVM compiler infrastructure project.
lld is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt.
In order to make sure various developers can evaluate patches over the same tests, we create a collection of self contained programs.
It is hosted at https://s3-us-west-2.amazonaws.com/linker-tests/lld-speed-test.tar.xz
The current sha256 is 10eec685463d5a8bbf08d77f4ca96282161d396c65bd97dc99dbde644a31610f.