Michael Gottesman e7a1e3ee82 [block-freq] Add BlockFrequency::scale that returns a remainder from the division and make the private scale in BlockFrequency more performant. ... This change is the first in a series of changes improving LLVM's Block Frequency propogation implementation to not lose probability mass in branchy code when propogating block frequency information from a basic block to its successors. This patch is a simple infrastructure improvement that does not actually modify the block frequency algorithm. The specific changes are: 1. Changes the division algorithm used when scaling block frequencies by branch probabilities to a short division algorithm. This gives us the remainder for free as well as provides a nice speed boost. When I benched the old routine and the new routine on a Sandy Bridge iMac with disabled turbo mode performing 8192 iterations on an array of length 32768, I saw ~600% increase in speed in mean/median performance. 2. Exposes a scale method that returns a remainder. This is important so we can ensure that when we scale a block frequency by some branch probability BP = N/D, the remainder from the division by D can be retrieved and propagated to other children to ensure no probability mass is lost (more to come on this). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194950 91177308-0d34-0410-b5e6-96231b3b80d8		2013-11-17 03:25:24 +00:00
..
AlignOfTest.cpp	[AlignOf] Add AlignedCharArray and refactor AlignedCharArrayUnion.	2012-12-31 19:54:45 +00:00
AllocatorTest.cpp	Sort the #include lines for unittest/...	2012-12-04 10:23:08 +00:00
ArrayRecyclerTest.cpp	Rename the unittest from ArrayRecylerTest.cpp to ArrayRecyclerTest.cpp.	2013-01-05 02:08:43 +00:00
BlockFrequencyTest.cpp	[block-freq] Add BlockFrequency::scale that returns a remainder from the division and make the private scale in BlockFrequency more performant.	2013-11-17 03:25:24 +00:00
Casting.cpp	Fix a regression I introduced back in r178147.	2013-07-18 02:42:40 +00:00
CMakeLists.txt	Make SourceMgr::PrintMessage() testable and add unit tests	2013-09-27 21:09:25 +00:00
CommandLineTest.cpp	Implement TokenizeWindowsCommandLine.	2013-07-30 19:03:20 +00:00
CompressionTest.cpp	Expose CRC-32 implementation from zlib	2013-08-14 16:03:29 +00:00
ConstantRangeTest.cpp	make ConstantRange::signExtend() optimal	2013-10-30 15:36:50 +00:00
ConvertUTFTest.cpp	[Support] Add a Unicode conversion wrapper from UTF16 to UTF8	2013-07-16 17:14:33 +00:00
DataExtractorTest.cpp	DataExtractor: Fix integer truncation issues in LEB128 extraction.	2012-08-20 10:52:11 +00:00
EndianTest.cpp	[Support][Endian] Add support for specifying the alignment and native unaligned types.	2013-01-02 20:14:11 +00:00
ErrorOrTest.cpp	Simplify ErrorOr.	2013-11-05 00:28:01 +00:00
FileOutputBufferTest.cpp	Add a convenience createUniqueDirectory function.	2013-06-27 03:45:31 +00:00
formatted_raw_ostream_test.cpp	Sort the #include lines for unittest/...	2012-12-04 10:23:08 +00:00
LeakDetectorTest.cpp
LockFileManagerTest.cpp	Fix boolean logic in LockFileManager and test it	2013-08-07 01:22:04 +00:00
Makefile	Update incorrect file headers.	2013-08-01 18:42:28 +00:00
ManagedStatic.cpp	Get the unittests compiling when building with cmake and the setting	2013-05-14 13:29:16 +00:00
MathExtrasTest.cpp	[Support] Remove Count{Leading,Trailing}Zeros_{32,64}.	2013-05-24 22:58:37 +00:00
MD5Test.cpp	Add support for adding the contents of a StringRef to the MD5 hash.	2013-05-31 22:34:56 +00:00
MemoryBufferTest.cpp	Change MemoryBuffer::getFile to take a Twine.	2013-10-25 19:06:52 +00:00
MemoryTest.cpp	Go ahead and get rid of the old page size interface and convert all the	2012-12-31 23:31:56 +00:00
Path.cpp	Path: Recognize COFF import library file magic.	2013-11-15 21:22:02 +00:00
ProcessTest.cpp	Try to unbreak mingw32 buildbot.	2013-09-10 21:32:42 +00:00
ProgramTest.cpp	Add non-blocking Wait() for launched processes	2013-10-01 14:28:18 +00:00
raw_ostream_test.cpp
RegexTest.cpp	Fix off-by-one error in Regex::isValid	2013-08-08 17:32:45 +00:00
SourceMgrTest.cpp	SourceMgr diagnotics printing: fix a bug where printing a fixit for a source	2013-09-27 21:24:36 +00:00
SwapByteOrderTest.cpp	Merge System into Support.	2010-11-29 18:16:10 +00:00
TimeValueTest.cpp	unittests/Support: Add TimeValue.Win32FILETIME, corresponding to r186374.	2013-07-16 02:44:23 +00:00
UnicodeTest.cpp	Move generic isPrint and columnWidth implementations to a separate header/source to allow using both generic and system-dependent versions on win32.	2013-09-04 16:00:12 +00:00
ValueHandleTest.cpp	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
YAMLIOTest.cpp	remove extra semicolon	2013-11-14 03:03:05 +00:00
YAMLParserTest.cpp	Allow using MemoryBuffers with yaml::Stream directly.	2012-11-19 23:21:47 +00:00