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Vedant Kumar 65c67f5133 [Coverage] Use gap regions to select better line exec counts 
After clang started emitting deferred regions (r312818), llvm-cov has
had a hard time picking reasonable line execuction counts. There have
been one or two generic improvements in this area (e.g r310012), but
line counts can still report coverage for whitespace instead of code
(llvm.org/PR34612).

To fix the problem:

 * Introduce a new region kind so that frontends can explicitly label
   gap areas.

   This is done by changing the encoding of the columnEnd field of
   MappingRegion. This doesn't substantially increase binary size, and
   makes it easy to maintain backwards-compatibility.

 * Don't set the line count to a count from a gap area, unless the count
   comes from a wrapped segment.

 * Don't highlight gap areas as uncovered.

Fixes llvm.org/PR34612.

llvm-svn: 313597
2017-09-18 23:37:28 +00:00
bindings Update the Go bindings for r309426 (remove offset from llvm.dbg.value) 2017-07-28 22:44:44 +00:00
cmake [cmake] Add a simple function to dump all variables. 2017-09-18 21:52:02 +00:00
docs [Coverage] Use gap regions to select better line exec counts 2017-09-18 23:37:28 +00:00
examples Fix broken links to the Itanium CXX ABI 2017-09-12 00:19:11 +00:00
include [Coverage] Use gap regions to select better line exec counts 2017-09-18 23:37:28 +00:00
lib [Coverage] Use gap regions to select better line exec counts 2017-09-18 23:37:28 +00:00
projects Add temporary workaround to allow in-tree libc++ builds on Windows 2017-05-11 01:44:30 +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][runtimes] Use the same configuration for non-target and "default" target 2017-09-08 22:26:50 +00:00
test [Coverage] Use gap regions to select better line exec counts 2017-09-18 23:37:28 +00:00
tools [Coverage] Use gap regions to select better line exec counts 2017-09-18 23:37:28 +00:00
unittests [dwarfdump] Make .eh_frame an alias for .debug_frame 2017-09-18 14:15:57 +00:00
utils [lit] Use realpath when adding to the config map. 2017-09-18 23:36:35 +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 gitignore: Ignore .vs folder (VS2017 config files) 2017-04-08 00:16:58 +00:00
CMakeLists.txt Resubmit "[lit] Force site configs to run before source-tree configs" 2017-09-15 22:10:46 +00:00
CODE_OWNERS.TXT [ARC] Add ARC backend. 2017-08-24 15:40:33 +00:00
configure Remove autoconf support 2016-01-26 21:29:08 +00:00
CREDITS.TXT Add myself to CREDITS.txt 2017-09-18 14:33:39 +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 access 2017-08-18 02:39:28 +00:00
RELEASE_TESTERS.TXT [RelTest] Diana is doing both releases now 2017-07-14 08:33:52 +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.