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Mirror of https://github.com/RPCS3/llvm-mirror
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Gadi Haber 7a1dc6aba1 [X86][AVX2] bugzilla bug 21281 Performance regression in vector interleave in AVX2 
This is a patch for an on-going bugzilla bug 21281 on the generated X86 code for a matrix transpose8x8 subroutine which requires vector interleaving. The generated code in AVX2 is currently non-optimal and requires 60 instructions as opposed to only 40 instructions generated for AVX1.
 The patch includes a fix for the AVX2 case where vector unpack instructions use less operations than the vector blend operations available in AVX2.
 In this case using vector unpack instructions is more efficient.

Reviewers:
zvi  
delena  
igorb  
craig.topper  
guyblank  
eladcohen  
m_zuckerman  
aymanmus  
RKSimon 

llvm-svn: 298840
2017-03-27 12:13:37 +00:00
bindings [DebugInfo] Emit address space with DW_AT_address_class attribute for pointer and reference types 2017-03-08 23:55:44 +00:00
cmake Fix evaluation of LLVM_DEFINITIONS 2017-03-21 04:03:24 +00:00
docs Document how to fetch monorepo SVN revision notes 2017-03-24 20:47:41 +00:00
examples llvm/examples/Kaleidoscope/BuildingAJIT: More fixup corresponding to r295636. 2017-02-20 10:07:41 +00:00
include [IR] Implement pairs of non-const and const methods using the const version instead of the non-const version. NFCI 2017-03-27 05:47:03 +00:00
lib [X86][AVX2] bugzilla bug 21281 Performance regression in vector interleave in AVX2 2017-03-27 12:13:37 +00:00
projects [cmake] Include openmp with add_llvm_external_project 2017-03-07 18:54:17 +00:00
resources
runtimes [CMake] Support single target builtins build on Darwin 2017-03-24 02:21:11 +00:00
test [X86][AVX2] bugzilla bug 21281 Performance regression in vector interleave in AVX2 2017-03-27 12:13:37 +00:00
tools [llvm-readobj] Prefer ILT to IAT for reading COFF imports 2017-03-26 17:10:11 +00:00
unittests Make the home_directory test a little more resilient. 2017-03-22 16:30:06 +00:00
utils [TableGen] Make CodeGenMapTable understand the namespace field of an instruction 2017-03-27 07:13:44 +00:00
.arcconfig
.clang-format
.clang-tidy
.gitignore [.gitignore] Update .gitignore to ignore a nested build directory 2017-02-24 23:09:30 +00:00
CMakeLists.txt [CMake] Provide an option to disable runtimes build 2017-03-23 22:40:10 +00:00
CODE_OWNERS.TXT CODE_OWNERS: Take code ownership of instruction scheduling. 2017-03-10 18:34:37 +00:00
configure
CREDITS.TXT CODE_OWNERS: Take code ownership of instruction scheduling. 2017-03-10 18:34:37 +00:00
LICENSE.TXT
llvm.spec.in
LLVMBuild.txt
README.txt Test commit. Added a blank line. 2017-03-06 20:45:33 +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.