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9361d42b5e
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Eli Friedman 9361d42b5e [LangRef] Clarify semantics of volatile operations. 
Specifically, clarify the following:

1. Volatile load and store may access addresses that are not memory.
2. Volatile load and store do not modify arbitrary memory.
3. Volatile load and store do not trap.

Prompted by recent volatile discussion on llvmdev.

Currently, there's sort of a split in the source code about whether
volatile operations are allowed to trap; this resolves that dispute in
favor of not allowing them to trap.

Differential Revision: https://reviews.llvm.org/D53184

llvm-svn: 351772
2019-01-22 00:42:20 +00:00
benchmarks Pull google/benchmark library to the LLVM tree 2018-08-28 09:42:41 +00:00
bindings Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
cmake Document toolchain update policy 2019-01-21 23:53:52 +00:00
docs [LangRef] Clarify semantics of volatile operations. 2019-01-22 00:42:20 +00:00
examples Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
include [X86] Remove and autoupgrade vpmovqd/vpmovwb intrinsics using trunc+select. 2019-01-21 08:16:59 +00:00
lib GlobalISel: Fix out of bounds crashes in verifier 2019-01-22 00:29:37 +00:00
projects Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
resources
runtimes Revert "[CMake] Pass Clang defaults to runtimes builds" 2018-07-13 20:01:55 +00:00
test GlobalISel: Fix out of bounds crashes in verifier 2019-01-22 00:29:37 +00:00
tools [llvm-symbolizer] Add -no-demangle as alias for -demangle=false 2019-01-21 10:00:57 +00:00
unittests Fix compilation error with gcc 4.8 2019-01-21 18:21:03 +00:00
utils gn build: Stop passing -DLLVM_LIBXML2_ENABLED to some targets 2019-01-21 18:59:11 +00:00
.arcconfig
.clang-format
.clang-tidy
.gitattributes
.gitignore Git ignore CLion project configuration files. NFC 2019-01-02 19:58:07 +00:00
CMakeLists.txt Revert r351324 "Build LLVM-C.dll by default on windows and enable in release package" 2019-01-16 12:36:28 +00:00
CODE_OWNERS.TXT [llvm-mca] Move llvm-mca library to llvm/lib/MCA. 2018-12-17 08:08:31 +00:00
configure
CREDITS.TXT Remove a period from CREDITS.TXT (testing email change). NFC 2019-01-19 09:07:38 +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. 2018-09-22 01:01:03 +00:00
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.