llvm-project/lld
Peter Collingbourne f1a11f87a0 COFF: Implement string tail merging.
In COFF, duplicate string literals are merged by placing them in a
comdat whose leader symbol name contains a specific prefix followed
by the hash and partial contents of the string literal. This gives
us an easy way to identify sections containing string literals in
the linker: check for leader symbol names with the given prefix.

Any sections that are identified in this way as containing string
literals may be tail merged. We do so using the StringTableBuilder
class, which is also used to tail merge string literals in the ELF
linker. Tail merging is enabled only if ICF is enabled, as this
provides a signal as to whether the user cares about binary size.

Differential Revision: https://reviews.llvm.org/D44504

llvm-svn: 327668
2018-03-15 21:14:02 +00:00
..
COFF COFF: Implement string tail merging. 2018-03-15 21:14:02 +00:00
Common Make sure that clang-format doesn't reorder include files. 2018-02-28 21:32:24 +00:00
ELF Add a comment about ELF spec and the symbol table's sh_info. 2018-03-15 17:10:50 +00:00
MinGW [MinGW] Add support for the GNU ld flag --kill-at 2018-03-14 20:17:24 +00:00
cmake/modules [CMake] Properly conditionalize installation of lld libraries 2018-03-09 13:09:36 +00:00
docs Update man page for long opts that accept = after r326506 2018-03-02 02:57:12 +00:00
include/lld Merge {COFF,ELF}/Strings.cpp to Common/Strings.cpp. 2018-02-28 17:38:19 +00:00
lib Fix build broken by llvm r327486 2018-03-14 09:57:52 +00:00
test COFF: Implement string tail merging. 2018-03-15 21:14:02 +00:00
tools/lld Remove "--full-shutdown" and instead use an environment variable LLD_IN_TEST. 2018-02-16 23:41:48 +00:00
unittests [CMake] Use PRIVATE in target_link_libraries for executables 2017-12-05 21:49:56 +00:00
utils Add a script to run various benchmarks and send the result to lnt. 2017-11-14 16:40:30 +00:00
wasm [WebAssembly] Fix -Werror=extra failure due to enum in ternary 2018-03-14 21:43:04 +00:00
.arcconfig [lld] Set up .arcconfig to point to new Diffusion LLD repository 2017-12-06 20:56:23 +00:00
.clang-format
.gitignore
CMakeLists.txt [WebAssembly] Initial wasm linker implementation 2017-11-17 18:14:09 +00:00
CODE_OWNERS.TXT [WebAssembly] Initial wasm linker implementation 2017-11-17 18:14:09 +00:00
LICENSE.TXT
README.md Note that the test .tar.xz has been updated. 2017-12-22 19:37:32 +00:00

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.