Chandler Carruth bd357588a1 [x86] Teach the x86 vector shuffle lowering to detect mergable 128-bit ... lanes. By special casing these we can often either reduce the total number of shuffles significantly or reduce the number of (high latency on Haswell) AVX2 shuffles that potentially cross 128-bit lanes. Even when these don't actually cross lanes, they have much higher latency to support that. Doing two of them and a blend is worse than doing a single insert across the 128-bit lanes to blend and then doing a single interleaved shuffle. While this seems like a narrow case, it kept cropping up on me and the difference is *huge* as you can see in many of the test cases. I first hit this trying to perfectly fix the interleaving shuffle patterns used by Halide for AVX2. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222533 91177308-0d34-0410-b5e6-96231b3b80d8		2014-11-21 13:56:05 +00:00
..
Analysis	AliasSet: Simplify mergeSetIn	2014-11-19 19:36:18 +00:00
AsmParser	Update SetVector to rely on the underlying set's insert to return a pair<iterator, bool>	2014-11-19 07:49:26 +00:00
Bitcode	Add accessor marcos to ConstantPlaceHolder, similar to those in the base class.	2014-11-21 02:42:08 +00:00
CodeGen	[DAG] Refactor the shuffle combining logic in DAGCombiner. NFC.	2014-11-21 11:33:07 +00:00
DebugInfo	Make DWARFAcceleratorTable::dump() const.	2014-11-20 16:21:11 +00:00
ExecutionEngine	[MCJIT] Remove JITEventListener::NotifyFreeingMachineCode. This method is dead	2014-11-21 01:57:09 +00:00
IR	Add curly braces to workaround an MSVC bug.	2014-11-21 01:19:09 +00:00
IRReader
LineEditor
Linker	Update SetVector to rely on the underlying set's insert to return a pair<iterator, bool>	2014-11-19 07:49:26 +00:00
LTO	Remove StringMap::GetOrCreateValue in favor of StringMap::insert	2014-11-19 05:49:42 +00:00
MC	Remove StringMap::GetOrCreateValue in favor of StringMap::insert	2014-11-19 05:49:42 +00:00
Object	llvm-readobj: fix off-by-one error in COFFDumper	2014-11-19 02:07:10 +00:00
Option
ProfileData
Support	Remove support for undocumented SpecialCaseList entries.	2014-11-20 01:27:19 +00:00
TableGen
Target	[x86] Teach the x86 vector shuffle lowering to detect mergable 128-bit	2014-11-21 13:56:05 +00:00
Transforms	[asan] Add new hidden compile-time flag asan-instrument-allocas to sanitize variable-sized dynamic allocas. Patch by Max Ostapenko.	2014-11-21 10:29:50 +00:00
CMakeLists.txt
LLVMBuild.txt
Makefile