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Sanjay Patel fe76881930 [X86, AVX] recognize shufflevector with zero input as a vperm2 (PR22984) 
vperm2x128 instructions have the special ability (aka free hardware capability)
to shuffle zero values into a vector.

This patch recognizes that type of shuffle and generates the appropriate
control byte.

https://llvm.org/bugs/show_bug.cgi?id=22984

Differential Revision: http://reviews.llvm.org/D8563



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@233100 91177308-0d34-0410-b5e6-96231b3b80d8
2015-03-24 19:19:07 +00:00
autoconf [autoconf] Fix the build failure by quoting the strings. 2015-03-12 19:56:25 +00:00
bindings Go bindings: use MDNode::replaceAllUsesWith instead of MDTuple::replaceAllUsesWith. 2015-03-05 22:55:38 +00:00
cmake Re-land: Generate targets for each lit suite. 2015-03-23 20:04:00 +00:00
docs docs: Update llvm-cov docs for the -use-color flag 2015-03-19 18:22:46 +00:00
examples CMake: Disable ENABLE_EXPORTS for executables with MSVC 2015-03-18 20:09:13 +00:00
include DebugInfo: Reorder definitions of MDLocation and MDFile, NFC 2015-03-24 17:34:33 +00:00
lib [X86, AVX] recognize shufflevector with zero input as a vperm2 (PR22984) 2015-03-24 19:19:07 +00:00
projects Reverse the order libc++ and libc++abi are added in CMake. 2015-03-04 01:16:43 +00:00
test [X86, AVX] recognize shufflevector with zero input as a vperm2 (PR22984) 2015-03-24 19:19:07 +00:00
tools Cleanup else-after-return and add an early-return to llvm-nm 2015-03-23 21:17:43 +00:00
unittests Purge unused includes throughout libSupport. 2015-03-23 18:07:13 +00:00
utils Revert "Use std::bitset for SubtargetFeatures" 2015-03-24 12:56:59 +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 Enable display of compiler diagnostics in clang-tidy by default. 2014-10-29 17:29:38 +00:00
.gitignore Add one more vim swap file pattern 2015-01-30 21:59:28 +00:00
CMakeLists.txt Re-land: Generate targets for each lit suite. 2015-03-23 20:04:00 +00:00
CODE_OWNERS.TXT Tom is also responsible for the 3.6 branch. 2015-03-16 18:15:27 +00:00
configure [autoconf] Fix the build failure by quoting the strings. 2015-03-12 19:56:25 +00:00
CREDITS.TXT Rise from the dead and update personal info 2014-08-25 17:51:04 +00:00
LICENSE.TXT Update for a new year. 2015-03-12 01:25:29 +00:00
llvm.spec.in
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.common: Update a description, s/Source/SOURCES/ , according to MakefileGuide.html#control-variables . 2012-12-07 01:43:23 +00:00
Makefile.config.in Add a check for misbehaving -Wcomment from gcc-4.7 and add 2014-11-05 00:35:15 +00:00
Makefile.rules Add support for SunOS function/data sections and associated 2015-03-03 20:54:29 +00:00
README.txt Revert test commit 2015-02-04 18:46:00 +00:00

README.txt 

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