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Mirror of https://github.com/RPCS3/llvm-mirror
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Simon Pilgrim 50affcce7b [X86][SSE42] Lower v2i64/v4i64 ASHR(X, 63) as PCMPGTQ(0, X) 
Similar to what we do for vXi8 ASHR(X, 7), use SSE42's PCMPGTQ to splat the sign instead of using the PSRAD+PSHUFD.

Avoiding bitcasts this improves combines that utilize computeNumSignBits, permits memory folding and reduces pipe pressure. Although it does require a second register, given that this is a (cheap) zero register the impact is minimal.

Differential Revision: https://reviews.llvm.org/D32973

llvm-svn: 302525
2017-05-09 13:14:40 +00:00
bindings [go bindings] Rmove duplicated conversion function definitions after r300843. 2017-04-20 19:06:11 +00:00
cmake Revert "Revert "CMake: Move sphinx detection into AddSphinxTarget.cmake"" 2017-05-09 01:41:28 +00:00
docs Introduce experimental generic intrinsics for horizontal vector reductions. 2017-05-09 10:43:25 +00:00
examples [Kaleidoscope] toy.cpp use after move fix 2017-05-07 11:00:01 +00:00
include Introduce experimental generic intrinsics for horizontal vector reductions. 2017-05-09 10:43:25 +00:00
lib [X86][SSE42] Lower v2i64/v4i64 ASHR(X, 63) as PCMPGTQ(0, X) 2017-05-09 13:14:40 +00:00
projects [cmake] Include openmp with add_llvm_external_project 2017-03-07 18:54:17 +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][runtimes] Use -nodefaultlibs for the runtimes build 2017-04-13 21:29:03 +00:00
test [X86][SSE42] Lower v2i64/v4i64 ASHR(X, 63) as PCMPGTQ(0, X) 2017-05-09 13:14:40 +00:00
tools Hopefully one last commit to fix this patch, addresses string reference 2017-05-08 02:47:42 +00:00
unittests Make it illegal for two Functions to point to the same DISubprogram 2017-05-08 21:17:08 +00:00
utils Fix comment typos. 2017-05-08 15:33:08 +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 folder (VS2017 config files) 2017-04-08 00:16:58 +00:00
CMakeLists.txt CMake: Add LLVM_DYLIB_SYMBOL_VERSIONING option 2017-05-03 14:43:44 +00:00
CODE_OWNERS.TXT CODE_OWNERS: Take code ownership of instruction scheduling. 2017-03-10 18:34:37 +00:00
configure Remove autoconf support 2016-01-26 21:29:08 +00:00
CREDITS.TXT CODE_OWNERS: Take code ownership of instruction scheduling. 2017-03-10 18:34:37 +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
README.txt Test commit. Added a blank line. 2017-03-06 20:45:33 +00:00
RELEASE_TESTERS.TXT Update the release tester for MIPS. NFC. 2017-01-17 11:00:28 +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.