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Dehao Chen a75059ebaa Encode duplication factor from loop vectorization and loop unrolling to discriminator. 
Summary:
This patch starts the implementation as discuss in the following RFC: http://lists.llvm.org/pipermail/llvm-dev/2016-October/106532.html

When optimization duplicates code that will scale down the execution count of a basic block, we will record the duplication factor as part of discriminator so that the offline process tool can find the duplication factor and collect the accurate execution frequency of the corresponding source code. Two important optimization that fall into this category is loop vectorization and loop unroll. This patch records the duplication factor for these 2 optimizations.

The recording will be guarded by a flag encode-duplication-in-discriminators, which is off by default.

Reviewers: probinson, aprantl, davidxl, hfinkel, echristo

Reviewed By: hfinkel

Subscribers: mehdi_amini, anemet, mzolotukhin, llvm-commits

Differential Revision: https://reviews.llvm.org/D26420

llvm-svn: 294782
2017-02-10 21:09:07 +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] Fix pthread handling for out-of-tree builds 2017-02-10 01:59:20 +00:00
docs Encode duplication factor from loop vectorization and loop unrolling to discriminator. 2017-02-10 21:09:07 +00:00
examples [CMake] Fix pthread handling for out-of-tree builds 2017-02-10 01:59:20 +00:00
include Encode duplication factor from loop vectorization and loop unrolling to discriminator. 2017-02-10 21:09:07 +00:00
lib Encode duplication factor from loop vectorization and loop unrolling to discriminator. 2017-02-10 21:09:07 +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 Encode duplication factor from loop vectorization and loop unrolling to discriminator. 2017-02-10 21:09:07 +00:00
tools [XRay] A graph Class for the llvm-xray graph 2017-02-10 06:36:08 +00:00
unittests [XRay][graph] Disambiguate name of type from member name 2017-02-10 06:59:25 +00:00
utils opt-viewer: fix HtmlFormatter encoding 2017-02-10 04:50:18 +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 Test commit. 2014-03-02 13:08:46 +00:00
.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 [CMake] Allow overriding CMAKE_LIBTOOL 2017-02-07 23:32:56 +00:00
CODE_OWNERS.TXT CODE_OWNERS: Update email address 2017-02-09 21:29:12 +00:00
configure Remove autoconf support 2016-01-26 21:29:08 +00:00
CREDITS.TXT Revert r294228 2017-02-06 19:40:56 +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 Remove the very substantial, largely unmaintained legacy PGO 2013-10-02 15:42:23 +00:00
README.txt Test commit: remove a blank line. 2017-02-03 10:56:57 +00:00
RELEASE_TESTERS.TXT Update the release tester for MIPS. NFC. 2017-01-17 11:00:28 +00:00

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