Chandler Carruth 98eac0a244 [x86] Re-apply a variant of the x86 side of r212324 now that the rest ... has settled without incident, removing the x86-specific and overly strict 'isVectorSplat' routine in favor of generic and more powerful splat detection. The primary motivation and result of this is that the x86 backend can now see through splats which contain undef elements. This is essential if we are using a widening form of legalization and I've updated a test case to also run in that mode as before this change the generated code for the test case was completely scalarized. This version of the patch much more carefully handles the undef lanes. - We aren't overly conservative about them in the shift lowering (where we will never use the splat itself). - One place where the splat would have been re-used by the existing code now explicitly constructs a new constant splat that will be safe. - The broadcast lowering is much more reasonable with undefs by doing a correct check of whether the splat is the only user of a loaded value, checking that the splat actually crosses multiple lanes before using a broadcast, and handling broadcasts of non-constant splats. As a consequence of the last bullet, the weird usage of vpshufd instead of vbroadcast is gone, and we actually can lower an AVX splat with vbroadcastss where before we emitted a really strange pattern of a vector load and a manual splat across the vector. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212602 91177308-0d34-0410-b5e6-96231b3b80d8		2014-07-09 10:06:58 +00:00
..
Analysis	Improve BasicAA CS-CS queries	2014-07-08 23:16:49 +00:00
Assembler	IR: Add COMDATs to the IR	2014-06-27 18:19:56 +00:00
Bindings	Reduce verbiage of lit.local.cfg files	2014-06-09 22:42:55 +00:00
Bitcode	Add some test files for r211710.	2014-06-25 15:41:39 +00:00
BugPoint
CodeGen	[x86] Re-apply a variant of the x86 side of r212324 now that the rest	2014-07-09 10:06:58 +00:00
DebugInfo	Temporarily revert "Don't try to construct debug LexicalScopes hierarchy for functions that do not have top level debug information." as it appears to be breaking some LTO constructs.	2014-07-03 22:24:54 +00:00
ExecutionEngine	Fix this test to not write to the source tree, and instead to write to	2014-06-28 05:18:49 +00:00
Feature	IR: Add COMDATs to the IR	2014-06-27 18:19:56 +00:00
FileCheck
Instrumentation	[asan] Generate asm instrumentation in MC.	2014-07-07 13:57:37 +00:00
Integer
JitListener
Linker	IR: Add COMDATs to the IR	2014-06-27 18:19:56 +00:00
LTO	Change the default input for llvm-nm to be a.out instead of standard input	2014-06-23 20:27:53 +00:00
MC	[ms-coff] Add a test for proper handling of full Windows path names in the .drectve section	2014-07-09 00:40:50 +00:00
Object	Changed the lvm-nm alias "-s" for -print-armap to "-M".	2014-07-08 23:47:31 +00:00
Other	IR: Fold away compares between GV GEPs and GVs	2014-07-04 22:05:26 +00:00
TableGen
tools	[llvm-readobj] Fix output of MIPS GOT without local and global entries.	2014-07-05 19:28:49 +00:00
Transforms	Revert "GlobalDCE: Delete available_externally initializers if it allows removing the value the initializer is referring to."	2014-07-08 17:06:03 +00:00
Unit	Let test/Unit/lit.cfg add config.shlibdir to $PATH on DLL platforms like cygming.	2014-07-04 05:11:55 +00:00
Verifier	IR: Add COMDATs to the IR	2014-06-27 18:19:56 +00:00
YAMLParser
.clang-format	Add .clang-format without column limit to subdirectory tests/.	2013-11-19 04:26:05 +00:00
CMakeLists.txt
lit.cfg	Delete utils/FileUpdate.	2014-06-23 17:58:39 +00:00
lit.site.cfg.in
Makefile
Makefile.tests
TestRunner.sh