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Kuba Mracek 8d57ff60d8 [lit] Limit parallelism of sanitizer tests on Darwin [llvm part, take 2] 
Running lit tests and unit tests of ASan and TSan on macOS has very bad performance when running with a high number of threads. This is caused by xnu (the macOS kernel), which currently doesn't handle mapping and unmapping of sanitizer shadow regions (reserved VM which are several terabytes large) very well. The situation is so bad that increasing the number of threads actually makes the total testing time larger. The macOS buildbots are affected by this. Note that we can't easily limit the number of sanitizer testing threads without affecting the rest of the tests.

This patch adds a special "group" into lit, and limits the number of concurrently running tests in this group. This helps solve the contention problem, while still allowing other tests to run in full, that means running lit with -j8 will still with 8 threads, and parallelism is only limited in sanitizer tests.

Differential Revision: https://reviews.llvm.org/D28420

llvm-svn: 292548
2017-01-20 00:24:32 +00:00
bindings Fix go bindings after r289702 (hopefully, don't really know how to build 2016-12-15 06:54:29 +00:00
cmake cmake: Only sanitize use-after-scope if the host compiler supports it 2017-01-18 19:01:58 +00:00
docs [docs] Tell Doxygen to expand LLVM_ALIGNAS to nothing 2017-01-19 13:37:42 +00:00
examples BrainF example: fixing output buffering issue 2017-01-17 13:27:28 +00:00
include [AliasAnalysis] Fences do not modify constant memory location 2017-01-20 00:21:33 +00:00
lib GlobalISel: Only set FailedISel on dropped dbg intrinsics when using fallback 2017-01-20 00:24:30 +00:00
llvm/Target/GlobalISel Re-commit: [globalisel] Tablegen-erate current Register Bank Information 2017-01-19 11:15:55 +00:00
projects [CMake] Correct configuration order of the sub-projects based on ther dependancies 2016-10-09 20:38:29 +00:00
resources In MSVC builds embed a VERSIONINFO resource in our exe and DLL files. 2015-06-12 15:58:29 +00:00
runtimes [CMake] Handle common options for runtimes build 2017-01-10 19:47:05 +00:00
test [AliasAnalysis] Fences do not modify constant memory location 2017-01-20 00:21:33 +00:00
tools Add support for the new LC_NOTE load command. 2017-01-19 17:36:31 +00:00
unittests [pdb] Add HashTable data structure. 2017-01-19 23:31:24 +00:00
utils [lit] Limit parallelism of sanitizer tests on Darwin [llvm part, take 2] 2017-01-20 00:24:32 +00:00
.arcconfig project_id is from another era in phabricator land and does not provide any value. 2016-09-27 15:47:29 +00:00
.clang-format
.clang-tidy .clang-tidy: correct style name is 'camelBack' not 'lowerCase'. 2016-09-13 19:04:26 +00:00
.gitignore [AVR] Add the integrated testing tool to the .gitignore 2016-12-14 11:47:14 +00:00
CMakeLists.txt Bump trunk version to 5.0.0svn 2017-01-12 21:22:36 +00:00
CODE_OWNERS.TXT CODE_OWNERS: Take ownership of IR Linker as discussed on llvm-dev 2016-12-02 14:06:53 +00:00
configure Remove autoconf support 2016-01-26 21:29:08 +00:00
CREDITS.TXT Revert revision 289721. 2016-12-14 21:58:42 +00:00
LICENSE.TXT Bump year to 2017 in LICENSE.txt 2017-01-12 18:02:42 +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 Test commit, deleted empty line at the end of README.txt 2016-11-07 18:31:21 +00:00
RELEASE_TESTERS.TXT Update the release tester for MIPS. NFC. 2017-01-17 11:00:28 +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.