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llvm-project/lld
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Fangrui Song 3e0a54e9da [ELF] Use llvm::toLower instead of libc call tolower 
tolower() has some overhead because current locale is considered (though in lld the default "C" locale is used which does not matter too much). llvm::toLower is more efficient as it compiles to a compare and a conditional jump, as opposed to a libc call if tolower is used.

Disregarding locale also matches gdb's behavior (gdb/minsyms.h):

    #define SYMBOL_HASH_NEXT(hash, c)			\
      ((hash) * 67 + TOLOWER ((unsigned char) (c)) - 113)

where TOLOWER (include/safe-ctype.h) is a macro that uses a lookup table under the hood which is similar to llvm::toLower.

Reviewers: ruiu, espindola

Subscribers: emaste, arichardson, llvm-commits

Differential Revision: https://reviews.llvm.org/D52128

llvm-svn: 342342
 		2018-09-15 23:59:13 +00:00
..
COFF lld-link: Set PDB GUID to hash of PDB contents instead of to a random byte sequence. 2018-09-15 18:37:22 +00:00
Common lld-link: print demangled symbol names for "undefined symbol" diagnostics 2018-09-15 18:27:09 +00:00
ELF [ELF] Use llvm::toLower instead of libc call tolower 2018-09-15 23:59:13 +00:00
MinGW [MinGW] Hook up the --require-defined option to -include: 2018-09-10 17:41:40 +00:00
cmake/modules [CMake] Properly conditionalize installation of lld libraries 2018-03-09 13:09:36 +00:00
docs lld: add -z interpose support 2018-09-14 14:25:37 +00:00
include/lld Rename a function to follow the LLVM coding style. 2018-08-27 06:18:10 +00:00
lib MachO: Change getString16() back to inline function 2018-09-07 15:51:52 +00:00
test lld-link: Set PDB GUID to hash of PDB contents instead of to a random byte sequence. 2018-09-15 18:37:22 +00:00
tools/lld Fix typo in error message. NFC. 2018-09-13 15:37:13 +00:00
unittests [Darwin] Use errorHandler from liblldCommon 2018-06-12 02:34:04 +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] clang-format (NFC) 2018-08-29 21:03:16 +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 Update copyright year to 2018. 2018-06-18 12:22:17 +00:00
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.