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4363b0729b
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Chandler Carruth 4363b0729b [x86] Teach the target-specific combining how to aggressively fold 
half-shuffles, even looking through intervening instructions in a chain.

Summary:
This doesn't happen to show up with any test cases I've found for the current
shuffle lowering, but previous attempts would benefit from this and it seems
generally useful. I've tested it directly using intrinsics, which also shows
that it will work with hand vectorized code as well.

Note that even though pshufd isn't directly used in these tests, it gets
exercised because we combine some of the half shuffles into a pshufd
first, and then merge them.

Differential Revision: http://reviews.llvm.org/D4291

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211890 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-27 11:34:40 +00:00
autoconf Remove path_tclsh.m4. 2014-06-02 12:54:32 +00:00
bindings [OCaml] Unbreak Llvm_target.TargetMachine.set_verbose_asm 2014-06-09 17:34:34 +00:00
cmake Remove clang-specific libxml2 check from CMake 2014-06-06 05:08:42 +00:00
docs fixed typo 2014-06-26 22:18:51 +00:00
examples Try to fix the msvc build. 2014-04-29 23:37:02 +00:00
include IRReader: don't mark MemoryBuffers const 2014-06-27 09:19:14 +00:00
lib [x86] Teach the target-specific combining how to aggressively fold 2014-06-27 11:34:40 +00:00
projects Remove projects/sample. 2014-03-12 22:40:22 +00:00
test [x86] Teach the target-specific combining how to aggressively fold 2014-06-27 11:34:40 +00:00
tools Support: update DLLCharacteristics enumeration 2014-06-27 03:11:18 +00:00
unittests Revert "Introduce a string_ostream string builder facilty" 2014-06-26 22:52:05 +00:00
utils Revert "Introduce a string_ostream string builder facilty" 2014-06-26 22:52:05 +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
.gitignore Add Polly to the ignored trees. 2014-06-25 13:13:36 +00:00
CMakeLists.txt Delete utils/FileUpdate. 2014-06-23 17:58:39 +00:00
CODE_OWNERS.TXT ARM Linux support 2014-04-02 23:03:28 +00:00
configure Touch configure to force clang's config.h.in reconfiguration on the build servers 2014-06-06 10:36:38 +00:00
CREDITS.TXT Update Credits. 2014-05-29 19:59:58 +00:00
LICENSE.TXT Remove projects/sample. 2014-03-12 22:40:22 +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.config.in Add a --enable-clang-plugin-support option to configure. 2014-03-10 16:58:35 +00:00
Makefile.rules [Make] Fix dependencies for td.expanded 2014-06-20 19:00:41 +00:00
README.txt Trivial test commit. 2014-04-26 19:05:45 +00:00

README.txt 

Low Level Virtual Machine (LLVM)
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