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171807f96b
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Alexey Bataev 171807f96b [SLP] Fixed cost model for horizontal reduction. 
Currently when cost of scalar operations is evaluated the vector type is
used for scalar operations. Patch fixes this issue and fixes evaluation
of the vector operations cost.
Several test showed that vector cost model is too optimistic. It
allowed vectorization of 8 or less add/fadd operations, though scalar
code is faster. Actually, only for 16 or more operations vector code
provides better performance.

Differential Revision: https://reviews.llvm.org/D26277

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@288398 91177308-0d34-0410-b5e6-96231b3b80d8
2016-12-01 18:42:42 +00:00
bindings Fix go binding to adapt the new attribute API 2016-11-18 10:11:02 +00:00
cmake cmake: Set rpath for loadable modules as well as shared libraries. 2016-11-28 21:59:14 +00:00
docs Revert 'Test commit as per developer policy' 2016-11-30 08:24:43 +00:00
examples ExceptionDemo: remove some undefined behaviour 2016-11-20 02:36:38 +00:00
include [SLP] Fixed cost model for horizontal reduction. 2016-12-01 18:42:42 +00:00
lib [SLP] Fixed cost model for horizontal reduction. 2016-12-01 18:42:42 +00:00
projects [CMake] Correct configuration order of the sub-projects based on ther dependancies 2016-10-09 20:38:29 +00:00
resources
runtimes [CMake] Make the runtimes directory work with bootstrap builds 2016-10-19 21:50:25 +00:00
test [SLP] Fixed cost model for horizontal reduction. 2016-12-01 18:42:42 +00:00
tools [llvm] Implement support for -defsym assembler option 2016-12-01 18:42:04 +00:00
unittests Use trigrams to speed up SpecialCaseList. 2016-12-01 02:54:54 +00:00
utils Recommit r287403 (reverted in r287804): [lit] When setting SDKROOT on Darwin, use '--sdk macosx' to find the right SDK path. 2016-12-01 17:45:22 +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 Code editor files 2016-09-02 22:54:26 +00:00
CMakeLists.txt Add link-time detection of LLVM_ABI_BREAKING_CHECKS mismatch 2016-11-28 22:23:53 +00:00
CODE_OWNERS.TXT CODE_OWNERS: Take ownership of Loop Strenght Reduce. 2016-11-30 19:55:49 +00:00
configure
CREDITS.TXT Test Commit, removing a blank line in CREDITS.TXT 2016-11-24 15:40:19 +00:00
LICENSE.TXT Remove autoconf references from LICENSE.TXT 2016-08-12 20:11:03 +00:00
llvm.spec.in
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

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.