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Evgeniy Stepanov df187feae4 [msan] Fix handling of multiplication by a constant with a number of trailing zeroes. 
Multiplication by an integer with a number of trailing zero bits leaves
the same number of lower bits of the result initialized to zero.
This change makes MSan take this into account in the case of multiplication by
a compile-time constant.

We don't handle the general, non-constant, case because
(a) it's not going to be cheap (computation-wise);
(b) multiplication by a partially uninitialized value in user code is
    a bad idea anyway.

Constant case must be handled because it appears from LLVM optimization of a
completely valid user code, as the test case in compiler-rt demonstrates.

llvm-svn: 211092
 		2014-06-17 09:23:12 +00:00
..
SDKs Fix typos 2014-05-15 02:22:34 +00:00
android Move Android ucontext.h out of third_party. 2014-03-18 08:32:14 +00:00
cmake [Sanitizers Win] Move duplicate Windows-specific compiler flags to a common CMake variable 2014-05-30 12:42:57 +00:00
include [sanitizer] Add __sanitizer_maybe_open_cov_file(). 2014-05-21 13:43:52 +00:00
lib builtins: add it blocks for Thumb-2 2014-06-16 16:36:25 +00:00
make Unify the name of compiler-rt builtins library on Linux. 2014-05-22 21:12:43 +00:00
test [msan] Fix handling of multiplication by a constant with a number of trailing zeroes. 2014-06-17 09:23:12 +00:00
unittests [ASan] Optional support for dynamic ASan runtime on Linux. 2014-04-01 13:16:30 +00:00
www Rewrite compiler-rt.llvm.org to make it relevant 2014-02-27 14:39:48 +00:00
.arcconfig Update arc config to new domain. 2014-04-07 10:22:41 +00:00
.gitignore Add vim swap files to .gitignore 2014-03-20 19:44:33 +00:00
CMakeLists.txt Fix Android build after r210053 2014-06-03 04:29:46 +00:00
CODE_OWNERS.TXT Add myself as a c-rt owner of ASan/Win 2014-02-27 12:07:43 +00:00
CREDITS.TXT Add Guan-Hong Liu. 2014-06-16 08:38:19 +00:00
LICENSE.TXT Move Android ucontext.h out of third_party. 2014-03-18 08:32:14 +00:00
Makefile Revert r196490 and fix include paths in makefile-based build 2013-12-05 10:40:11 +00:00
README.txt Moved the builtins documentation to lib/builtins/ 2014-05-28 23:09:45 +00:00

README.txt 

Compiler-RT
================================

This directory and its subdirectories contain source code for the compiler
support routines.

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

================================