| commit | af0a8ad5acb345dfcf762ff50f4bc2d5a5acc6a9 | [log] [tgz] |
|---|---|---|
| author | Fangrui Song <maskray@google.com> | Fri Aug 30 07:10:30 2019 +0000 |
| committer | Fangrui Song <maskray@google.com> | Fri Aug 30 07:10:30 2019 +0000 |
| tree | c959752e88054f7a1d624f8b3f23e6f69110d0ae | |
| parent | 1f5e1d95af093cc146f06cf99cb9a1e665d7d2c5 [diff] |
[ELF] Set `referenced` bit of Undefined created by BitcodeFile D64136 and D65584, while fixing STB_WEAK issues and improving our compatibility with ld.bfd, can cause another STB_WEAK problem related to LTO: If %tundef.o has an undefined reference on f, and %tweakundef.o has a weak undefined reference on f, %tdef.o has a definition of f ``` ld.lld %tundef.o %tweakundef.o --start-lib %tdef.o --end-lib ``` 1) `%tundef.o` doesn't set the `referenced` bit. 2) `%weakundef.o` changes the binding from STB_GLOBAL to STB_WEAK 3) `%tdef.o` is not fetched because the binding is weak. Step (1) is incorrect. This patch sets the `referenced` bit of Undefined created by bitcode files. Reviewed By: ruiu Differential Revision: https://reviews.llvm.org/D66992 git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@370437 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.