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Ben Dunbobbin d8484b56e4 [X86][ELF] Prefer lowering MC_GlobalAddress operands to .Lfoo$local for STV_DEFAULT only 
This patch restricts the behaviour of referencing via .Lfoo$local
local aliases, introduced in https://reviews.llvm.org/D73230, to
STV_DEFAULT globals only.

Hidden symbols via --fvisiblity=hidden (https://gcc.gnu.org/wiki/Visibility)
is an important scenario.

Benefits:

- Improves the size of object files by using fewer STT_SECTION symbols.

- The code reads a bit better (it was not obvious to me without going
  back to the code reviews why the canBenefitFromLocalAlias function
  currently doesn't consider visibility).

- There is also a side benefit in restoring the effectiveness of the
  --wrap linker option and making the behavior of --wrap consistent
  between LTO and normal builds for references within a translation-unit.
  Note: this --wrap behavior (which is specific to LLD) should not be
  considered reliable. See comments on https://reviews.llvm.org/D73230
  for more.

Differential Revision: https://reviews.llvm.org/D85782

(cherry picked from commit 4cb016cd2d8467c572b2e5c5d34f376ee79e4ac1)
2020-09-17 13:23:29 +02:00
benchmarks
bindings Fix go bindings after FixedVectorType -> VectorType change. 2020-05-15 16:37:57 -07:00
cmake [cmake] Don't build with -O3 -fPIC on Solaris/sparcv9 2020-08-31 14:41:09 +02:00
docs llvm release notes: drop in-progress warnings; minor cleanups 2020-09-16 17:03:14 +02:00
examples [examples] fix ExceptionDemo 2020-07-11 12:38:27 -07:00
include Fix incorrect SimplifyWithOpReplaced transform (PR47322) 2020-09-15 10:21:08 +02:00
lib [X86][ELF] Prefer lowering MC_GlobalAddress operands to .Lfoo$local for STV_DEFAULT only 2020-09-17 13:23:29 +02:00
projects Add few docs and implementation of strcpy and strcat. 2019-10-04 17:30:54 +00:00
resources
runtimes [libc++] Fix the runtimes build after making __config_site mandatory 2020-06-26 01:26:34 -04:00
test [X86][ELF] Prefer lowering MC_GlobalAddress operands to .Lfoo$local for STV_DEFAULT only 2020-09-17 13:23:29 +02:00
tools [llvm-rc] Allow string table values split into multiple string literals 2020-08-05 19:59:38 +02:00
unittests Revert "Double check that passes correctly set their Modified status" 2020-09-15 16:47:29 +02:00
utils Add flang to export.sh to it gets source tarballs in releases 2020-07-31 17:23:43 +02:00
.clang-format Test commit. 2014-03-02 13:08:46 +00:00
.clang-tidy - Update .clang-tidy to ignore parameters of main like functions for naming violations in clang and llvm directory 2020-01-31 16:49:45 +00:00
.gitattributes Fix the "git modified" issue on the preserve-comments-crlf.s. 2019-09-10 12:17:49 +00:00
.gitignore [clangd] Store index in '.cache/clangd/index' instead of '.clangd/index' 2020-07-07 14:53:45 +02:00
CMakeLists.txt Drop the 'git' suffix from various version variables 2020-07-27 17:13:49 +02:00
CODE_OWNERS.TXT Make myself code owner of InferAddressSpaces 2020-06-08 21:26:01 -04:00
configure
CREDITS.TXT Update email address. 2019-07-17 07:02:02 +00:00
LICENSE.TXT Fix typos throughout the license files that somehow I and my reviewers 2019-01-21 09:52:34 +00:00
llvm.spec.in Update structured references to the license to the new license. 2019-01-19 11:30:51 +00:00
LLVMBuild.txt Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
README.txt Test commit. 2020-03-14 18:08:26 -07:00
RELEASE_TESTERS.TXT Update the list of platforms & archs 2018-12-16 14:47:16 +00:00

README.txt 

The LLVM Compiler Infrastructure
================================

This directory and its subdirectories contain source code for LLVM,
a toolkit for the construction of highly optimized compilers,
optimizers, and runtime environments.

LLVM is open source software. You may freely distribute it under the terms of
the license agreement found in LICENSE.txt.

Please see the documentation provided in docs/ for further
assistance with LLVM, and in particular docs/GettingStarted.rst for getting
started with LLVM and docs/README.txt for an overview of LLVM's
documentation setup.

If you are writing a package for LLVM, see docs/Packaging.rst for our
suggestions.