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James Y Knight 2d0c86cc0b Support expanding partial-word cmpxchg to full-word cmpxchg in AtomicExpandPass. 
Many CPUs only have the ability to do a 4-byte cmpxchg (or ll/sc), not 1
or 2-byte. For those, you need to mask and shift the 1 or 2 byte values
appropriately to use the 4-byte instruction.

This change adds support for cmpxchg-based instruction sets (only SPARC,
in LLVM). The support can be extended for LL/SC-based PPC and MIPS in
the future, supplanting the ISel expansions those architectures
currently use.

Tests added for the IR transform and SPARCv9.

Differential Revision: http://reviews.llvm.org/D21029

llvm-svn: 273025
2016-06-17 18:11:48 +00:00
bindings Remove the ScalarReplAggregates pass 2016-06-15 00:19:09 +00:00
cmake Add support for collating profiles for use with code coverage 2016-06-13 23:33:48 +00:00
docs LangRef: Note expectations when loading with extra alignment 2016-06-16 16:33:41 +00:00
examples [MCJIT] Update MCJIT and get the fibonacci example working again. 2016-06-11 05:47:04 +00:00
include Support expanding partial-word cmpxchg to full-word cmpxchg in AtomicExpandPass. 2016-06-17 18:11:48 +00:00
lib Support expanding partial-word cmpxchg to full-word cmpxchg in AtomicExpandPass. 2016-06-17 18:11:48 +00:00
projects Remove autoconf support 2016-01-26 21:29:08 +00:00
resources In MSVC builds embed a VERSIONINFO resource in our exe and DLL files. 2015-06-12 15:58:29 +00:00
test Support expanding partial-word cmpxchg to full-word cmpxchg in AtomicExpandPass. 2016-06-17 18:11:48 +00:00
tools Don't use the new x86 relax relocations on the gold plugin. 2016-06-17 17:53:57 +00:00
unittests [PM] Run clang-format over various parts of the new pass manager code 2016-06-17 07:15:29 +00:00
utils Remove the ScalarReplAggregates pass 2016-06-15 00:19:09 +00:00
.arcconfig
.clang-format
.clang-tidy Don't use misc-unused-parameters check on LLVM. 2016-04-13 08:58:52 +00:00
.gitignore Minor updates to gitignore so that symlinks are ignored in the projects dir. 2015-07-07 20:24:58 +00:00
CMakeLists.txt Add support for collating profiles for use with code coverage 2016-06-13 23:33:48 +00:00
CODE_OWNERS.TXT Sort my entry in CODE_OWNERS.TXT 2016-05-26 23:10:37 +00:00
configure Remove autoconf support 2016-01-26 21:29:08 +00:00
CREDITS.TXT Update my email address. 2016-05-10 16:23:54 +00:00
LICENSE.TXT Update copyright year to 2016. 2016-03-30 22:41:06 +00:00
llvm.spec.in [Sparc] Implement i64 load/store support for 32-bit sparc. 2015-08-10 19:11:39 +00:00
LLVMBuild.txt
README.txt Revert previous test commit. 2016-01-04 19:13:29 +00:00

README.txt 

Low Level Virtual Machine (LLVM)
================================

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.