Simon Pilgrim c377a8a5e0 [X86] Determine if target shuffle can contain zero elements ... getTargetShuffleMask may return shuffle masks with SM_SentinelZero (-2) values (currently just for PSHUFB but VPERM2X128 as well with this patch). Although some calling functions can make use of this (mainly for shuffle combining), others can not and their inclusion makes shuffle mask comparisons more difficult. This patch adds a flag to getTargetShuffleMask to indicate if the calling function can't handle SM_SentinelZero; getTargetShuffleMask will then return false if it occurs to make handling much easier. I've tidied up some uses of getTargetShuffleMask to better indicate what is going on - more could be done but at present I don't have test cases to demonstrate it. Some upcoming patches will make use of this to both support more uses where SM_SentinelZero is not permitted (e.g. combineShuffleToAddSub), and also will allow us to add INSERTPS support to getTargetShuffleMask as part of better zero handling discussed in D14261. Differential Revision: http://reviews.llvm.org/D15378 llvm-svn: 256992		2016-01-06 23:24:40 +00:00
..
Analysis	Recommit r256952 "Filtering IR printing for print-after-all/print-before-all"	2016-01-06 22:55:03 +00:00
AsmParser	Implemented Support of IA interrupt and exception handlers:	2015-12-21 14:07:14 +00:00
Bitcode	Bitcode: Fix reading and writing of ConstantDataVectors of halfs	2016-01-06 22:31:32 +00:00
CodeGen	Recommit r256952 "Filtering IR printing for print-after-all/print-before-all"	2016-01-06 22:55:03 +00:00
DebugInfo	Fix several accidental DOS line endings in source files	2016-01-03 17:22:03 +00:00
ExecutionEngine	Delete APIs that have been deprecated since 2010.	2015-12-19 21:42:07 +00:00
Fuzzer	[libFuzzer] extend the dictionary mutator to optionally overwrite data with the dict entry	2016-01-06 02:13:04 +00:00
IR	Recommit r256952 "Filtering IR printing for print-after-all/print-before-all"	2016-01-06 22:55:03 +00:00
IRReader	[ThinLTO] Metadata linking for imported functions	2015-12-17 17:14:09 +00:00
LibDriver
LineEditor
Linker	[ThinLTO] Rename variables used in metadata linking (NFC)	2015-12-30 21:13:55 +00:00
LTO	Rename variables to reflect linker split (NFC)	2015-12-18 19:28:59 +00:00
MC	Make WinCOFFObjectWriter.cpp's timestamp writing not use ENABLE_TIMESTAMPS	2016-01-06 19:05:19 +00:00
Object	Handle archives with paths in the names.	2015-12-18 16:07:17 +00:00
Option	Convert Arg, ArgList, and Option to dump() to dbgs() rather than errs().	2015-12-18 18:55:26 +00:00
Passes	[attrs] Extract the pure inference of function attributes into	2015-12-27 08:41:34 +00:00
ProfileData	[PGO] Simplify string parsing	2016-01-04 22:09:26 +00:00
Support	Do not define NOGDI. Mingw defines LOGFONTW type in wingdi.h and the mingw	2016-01-06 03:01:10 +00:00
TableGen	[TableGen] Use some free space in Init to store the opcode for UnOpInit/BinOpInit/TernOpInit allowing those types to be a little smaller. NFC	2016-01-04 06:28:49 +00:00
Target	[X86] Determine if target shuffle can contain zero elements	2016-01-06 23:24:40 +00:00
Transforms	[LibCallSimplifier] less indenting; NFCI	2016-01-06 20:52:21 +00:00
CMakeLists.txt
LLVMBuild.txt
Makefile