Chandler Carruth 330aa6fd6b [x86] Add a dedicated lowering path for zext-compatible vector shuffles ... to the new vector shuffle lowering code. This allows us to emit PMOVZX variants consistently for patterns where it is a viable lowering. This instruction is both fast and allows us to fold loads into it. This only hooks the new lowering up for i16 and i8 element widths, mostly so I could manage the change to the tests. I'll add the i32 one next, although it is significantly less interesting. One thing to note is that we already had some tests for these patterns but those tests had far less horrible instructions. The problem is that those tests weren't checking the strict start and end of the instruction sequence. =[ As a consequence something changed in the lowering making us generate *TERRIBLE* code for these patterns in SSE2 through SSSE3. I've consolidated all of the tests and spelled out the madness that we currently emit for these shuffles. I'm going to try to figure out what has gone wrong here. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218102 91177308-0d34-0410-b5e6-96231b3b80d8		2014-09-19 06:07:49 +00:00
..
Analysis	Add file to CMake build as well.	2014-09-18 00:39:20 +00:00
AsmParser	Make CallingConv::ID an alias of "unsigned".	2014-09-10 18:00:17 +00:00
Bitcode	Use IntrusiveRefCntPtr to manage the lifetime of BitCodeAbbrevs.	2014-09-15 15:44:14 +00:00
CodeGen	Optimize sext/zext insertion algorithm in back-end.	2014-09-19 05:30:35 +00:00
DebugInfo	Fix DWARFUnitSection::getUnitForOffset().	2014-09-18 09:38:15 +00:00
ExecutionEngine	[MCJIT] Fix a debugging-output formatting bug in RuntimeDyld.	2014-09-18 16:43:24 +00:00
IR	Use cast<> instead of unchecked dyn_cast<>	2014-09-18 22:28:56 +00:00
IRReader
LineEditor
Linker	Merge alignment of common GlobalValue.	2014-09-09 17:48:18 +00:00
LTO	LTO: introduce object file-based on-disk module format.	2014-09-18 21:28:49 +00:00
MC	Another required re-setting for MCStreamer::reset().	2014-09-17 17:50:34 +00:00
Object	LTO: introduce object file-based on-disk module format.	2014-09-18 21:28:49 +00:00
Option	Add an overload of getLastArgNoClaim taking two OptSpecifiers.	2014-09-12 19:42:53 +00:00
ProfileData	LineIterator: Provide a variant that keeps blank lines	2014-09-17 15:43:01 +00:00
Support	LineIterator: Provide a variant that keeps blank lines	2014-09-17 15:43:01 +00:00
TableGen	[TableGen] Fully resolve class-instance values before defs in multiclasses	2014-09-16 17:14:13 +00:00
Target	[x86] Add a dedicated lowering path for zext-compatible vector shuffles	2014-09-19 06:07:49 +00:00
Transforms	Add a new pass FunctionTargetTransformInfo. This pass serves as a	2014-09-18 00:34:14 +00:00
CMakeLists.txt
LLVMBuild.txt
Makefile