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Simon Pilgrim 6f240f4b49 [X86][SSE] Improve i16 splatting shuffles 
Better handling of the annoying pshuflw/pshufhw ops which only shuffle lower/upper halves of a vector.

Added vXi16 unary shuffle support for cases where i16 elements (from the same half of the source) are being splatted to the whole of one of the halves. This avoids the general lowering case which must shuffle the 32-bit elements first - meaning that we used to end up with unnecessary duplicate pshuflw/pshufhw shuffles.

Note this has the side effect of a lot of SSSE3 test cases no longer needing to use PSHUFB, as it falls below the 3 op combine threshold for when PSHUFB is typically worth it. I've raised PR26183 to discuss if the threshold should be changed and whether we need to make it more specific to the target CPU.

Differential Revision: http://reviews.llvm.org/D14901

llvm-svn: 258440
2016-01-21 22:07:41 +00:00
autoconf Update version to 3.9. 2016-01-13 17:32:32 +00:00
bindings Deprecate a few C APIs. 2015-12-18 23:46:42 +00:00
cmake tools/llvm-config: improve shared library support 2016-01-20 04:03:09 +00:00
docs Add a "gc-transition" operand bundle 2016-01-20 19:50:25 +00:00
examples Fix examples corresponding to r257302. 2016-01-11 05:04:20 +00:00
include Fix for two constant propagation problems in GVN with the assume intrinsic 2016-01-21 21:32:35 +00:00
lib [X86][SSE] Improve i16 splatting shuffles 2016-01-21 22:07:41 +00:00
projects [CMake] Disable adding the test suite as a projects subdirectory 2015-10-28 18:36:56 +00:00
resources In MSVC builds embed a VERSIONINFO resource in our exe and DLL files. 2015-06-12 15:58:29 +00:00
test [X86][SSE] Improve i16 splatting shuffles 2016-01-21 22:07:41 +00:00
tools Fix MachOObjectFile::getSymbolSection() to not call report_fatal_error() 2016-01-21 21:13:27 +00:00
unittests [Orc] Try to turn Orc execution unit tests back on for Linux. 2016-01-20 22:16:14 +00:00
utils In test-release.sh, only run uname -s once. NFC. 2016-01-21 22:07:17 +00:00
.arcconfig Updated phabricator server. 2014-04-07 03:57:04 +00:00
.clang-format Test commit. 2014-03-02 13:08:46 +00:00
.clang-tidy adding readability-identifier-naming to llvm clang-tidy configuration. 2015-12-08 17:44:51 +00:00
.gitignore Minor updates to gitignore so that symlinks are ignored in the projects dir. 2015-07-07 20:24:58 +00:00
CMakeLists.txt [GlobalISel] Add the proper cmake plumbing. 2016-01-20 20:58:56 +00:00
CODE_OWNERS.TXT The PS4 baton passes. 2015-12-19 20:04:03 +00:00
configure Update version to 3.9. 2016-01-13 17:32:32 +00:00
CREDITS.TXT [WebAssembly] Initial WebAssembly backend 2015-06-29 23:51:55 +00:00
LICENSE.TXT Update for a new year. 2015-03-12 01:25:29 +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
Makefile [configure/make] Propagate names of build host tools when making BuildTools 2014-03-25 21:45:41 +00:00
Makefile.common
Makefile.config.in We're actually -Wmissing-field-initializers clean thanks to the cmake 2015-08-07 16:44:47 +00:00
Makefile.rules Create Makefile variables for 'share' and 'libexec' 2015-11-09 16:10:00 +00:00
README.txt Revert previous test commit. 2016-01-04 19:13:29 +00:00

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.