llvm-project/lld
Jez Ng fd3669c256 [lld-macho] Improve hiding of unnamed_addr symbols
Symbols for which `canBeOmittedFromSymbolTable()` is true should be
treated as private externs. This diff tries to do that by unsetting the
ExportDynamic bit. It seems to mostly work with the FullLTO backend, but
with the ThinLTO backend, the `local_unnamed_addr` symbols still fail to
be properly hidden. Nonetheless, this is a step in the right direction.

I've documented all the remaining differences between our behavior and
LD64's in the lto-internalized-unnamed-addr.ll test.

See also https://discourse.llvm.org/t/mach-o-lto-handling-of-linkonce-odr-unnamed-addr/60015

Reviewed By: #lld-macho, thevinster

Differential Revision: https://reviews.llvm.org/D119767
2022-02-18 12:09:38 -05:00
..
COFF Reland: Make lld-link work in a non-MSVC shell, add /winsysroot: 2022-02-16 09:22:39 -05:00
Common [lld] Make error handling functions opaque 2022-02-17 11:54:57 -08:00
ELF [ELF] Support (TYPE=<value>) to customize the output section type 2022-02-17 12:10:58 -08:00
MachO [lld-macho] Improve hiding of unnamed_addr symbols 2022-02-18 12:09:38 -05:00
MinGW [LLD][MinGW] Add --heap argument support 2022-01-30 00:01:45 +02:00
cmake/modules [CMake] Factor out config prefix finding logic 2022-01-07 20:16:18 +00:00
docs [ELF] Support (TYPE=<value>) to customize the output section type 2022-02-17 12:10:58 -08:00
include/lld [lld] Make error handling functions opaque 2022-02-17 11:54:57 -08:00
test [lld-macho] Improve hiding of unnamed_addr symbols 2022-02-18 12:09:38 -05:00
tools/lld [LLD] Fix issue in HIP due to unspecified order of evaluation of the function object 2022-02-08 19:12:15 -05:00
utils
wasm [lld][WebAssembly] Apply global relocs before data relocs 2022-02-16 14:30:39 -08:00
.clang-format
.clang-tidy NFC: .clang-tidy: Inherit configs from parents to improve maintainability 2021-06-08 08:25:59 -07:00
.gitignore
CMakeLists.txt [lld][clang][cmake] Clean up a few things 2022-02-03 20:01:28 +00:00
CODE_OWNERS.TXT Add code owners of new MachO port 2020-09-02 19:32:12 -07:00
LICENSE.TXT
README.md [doc] Place sha256 in lld/README.md into backticks 2021-01-12 10:19:40 -08:00

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.