Chandler Carruth a644b090de [x86] Teach the new vector shuffle lowering how to lower 128-bit ... shuffles using AVX and AVX2 instructions. This fixes PR21138, one of the few remaining regressions impacting benchmarks from the new vector shuffle lowering. You may note that it "regresses" many of the vperm2x128 test cases -- these were actually "improved" by the naive lowering that the new shuffle lowering previously did. This regression gave me fits. I had this patch ready-to-go about an hour after flipping the switch but wasn't sure how to have the best of both worlds here and thought the correct solution might be a completely different approach to lowering these vector shuffles. I'm now convinced this is the correct lowering and the missed optimizations shown in vperm2x128 are actually due to missing target-independent DAG combines. I've even written most of the needed DAG combine and will submit it shortly, but this part is ready and should help some real-world benchmarks out. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219079 91177308-0d34-0410-b5e6-96231b3b80d8		2014-10-05 11:41:36 +00:00
..
Analysis	Make AAMDNodes ctor and operator bool (!!!) explicit, mop up bugs and weirdness exposed by it.	2014-10-04 22:44:29 +00:00
AsmParser	Make CallingConv::ID an alias of "unsigned".	2014-09-10 18:00:17 +00:00
Bitcode	Do not destroy external linkage when deleting function body	2014-09-23 12:54:19 +00:00
CodeGen	Make AAMDNodes ctor and operator bool (!!!) explicit, mop up bugs and weirdness exposed by it.	2014-10-04 22:44:29 +00:00
DebugInfo	Remove unnecessary copying or replace it with moves in a bunch of places.	2014-10-04 16:55:56 +00:00
ExecutionEngine	[MCJIT] Don't crash in debugging output for sections that aren't emitted.	2014-10-01 21:57:47 +00:00
IR	Revert "Revert "DI: Fold constant arguments into a single MDString""	2014-10-03 20:01:09 +00:00
IRReader	Pass a && to getLazyBitcodeModule.	2014-09-03 17:31:46 +00:00
LineEditor
Linker	Merge alignment of common GlobalValue.	2014-09-09 17:48:18 +00:00
LTO	LTO: Document the Boolean argument from r218784	2014-10-02 21:11:04 +00:00
MC	MCParser: Modernize memory handling.	2014-10-03 18:32:55 +00:00
Object	llvm-readobj: print out the fields of the COFF delay-import table	2014-10-03 18:07:18 +00:00
Option	Add an overload of getLastArgNoClaim taking two OptSpecifiers.	2014-09-12 19:42:53 +00:00
ProfileData	Eliminate some deep std::vector copies. NFC.	2014-10-03 18:33:16 +00:00
Support	Converting the ErrorHandlerMutex to a ManagedStatic to avoid the static constructor and destructor.	2014-10-03 22:03:12 +00:00
TableGen	Eliminate some deep std::vector copies. NFC.	2014-10-03 18:33:16 +00:00
Target	[x86] Teach the new vector shuffle lowering how to lower 128-bit	2014-10-05 11:41:36 +00:00
Transforms	[InstCombine] Simplify the logic from r219067 using ValueTracking	2014-10-05 00:53:02 +00:00
CMakeLists.txt
LLVMBuild.txt
Makefile