forked from OSchip/llvm-project
77152a6b7a
Optimize the filename glob pattern matching in LinkerScript::computeInputSections() and LinkerScript::shouldKeep(). Add InputFile::getNameForScript() which gets and if required caches the Inputfile's name used for linker script matching. This avoids the overhead of name creation that was in getFilename() in LinkerScript.cpp. Add InputSectionDescription::matchesFile() and SectionPattern::excludesFile() which perform the glob pattern matching for an InputFile and make use of a cache of the previous result. As both computeInputSections() and shouldKeep() process sections in order and the sections of the same InputFile are contiguous, these single entry caches can significantly speed up performance for more complex glob patterns. These changes have been seen to reduce link time with --gc-sections by up to ~40% with linker scripts that contain KEEP filename glob patterns such as "*crtbegin*.o". Differential Revision: https://reviews.llvm.org/D87469 |
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| .. | ||
| COFF | ||
| Common | ||
| ELF | ||
| MachO | ||
| MinGW | ||
| cmake/modules | ||
| docs | ||
| include/lld | ||
| lib | ||
| test | ||
| tools/lld | ||
| unittests | ||
| utils | ||
| wasm | ||
| .clang-format | ||
| .clang-tidy | ||
| .gitignore | ||
| CMakeLists.txt | ||
| CODE_OWNERS.TXT | ||
| LICENSE.TXT | ||
| README.md | ||
README.md
LLVM Linker (lld)
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.
Benchmarking
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.