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	[BasicAA] Revert r218714 - Make better use of zext and sign information.	2014-10-03 01:33:47 +00:00
Assembler	Revert "Revert "DI: Fold constant arguments into a single MDString""	2014-10-03 20:01:09 +00:00
Bindings	Revert "Revert "DI: Fold constant arguments into a single MDString""	2014-10-03 20:01:09 +00:00
Bitcode	Revert "Revert "DI: Fold constant arguments into a single MDString""	2014-10-03 20:01:09 +00:00
BugPoint	Revert "Revert "DI: Fold constant arguments into a single MDString""	2014-10-03 20:01:09 +00:00
CodeGen	[x86] Teach the new vector shuffle lowering how to lower 128-bit	2014-10-05 11:41:36 +00:00
DebugInfo	Revert "Revert "DI: Fold constant arguments into a single MDString""	2014-10-03 20:01:09 +00:00
ExecutionEngine	[mips] Remove XFAIL from two XPASS'ing tests on the llvm-mips-linux builder	2014-10-03 08:49:44 +00:00
Feature	Revert "Revert "DI: Fold constant arguments into a single MDString""	2014-10-03 20:01:09 +00:00
FileCheck
Instrumentation	Revert "Revert "DI: Fold constant arguments into a single MDString""	2014-10-03 20:01:09 +00:00
Integer
JitListener	Revert "Revert "DI: Fold constant arguments into a single MDString""	2014-10-03 20:01:09 +00:00
Linker	Revert "Revert "DI: Fold constant arguments into a single MDString""	2014-10-03 20:01:09 +00:00
LTO	LTO: Add missing target triple from r218784	2014-10-01 18:49:58 +00:00
MC	Revert "Revert "DI: Fold constant arguments into a single MDString""	2014-10-03 20:01:09 +00:00
Object	Nuke MCAnalysis.	2014-09-02 22:32:20 +00:00
Other	[lit] Parse all strings as UTF-8 rather than ASCII.	2014-09-12 16:46:05 +00:00
TableGen	[AVX512] Added intrinsics for VPCMPEQB and VPCMPEQW.	2014-09-30 11:32:22 +00:00
tools	llvm-readobj: print out the fields of the COFF delay-import table	2014-10-03 18:07:18 +00:00
Transforms	[InstCombine] Remove redundant @llvm.assume intrinsics	2014-10-04 21:27:06 +00:00
Unit
Verifier
YAMLParser
.clang-format
CMakeLists.txt	Add LLVMgold target to test dependencies.	2014-09-10 22:20:49 +00:00
lit.cfg	pass environment when invoking llvm-config from lit.cfg	2014-09-24 18:37:48 +00:00
lit.site.cfg.in
Makefile
Makefile.tests
TestRunner.sh