Sanjay Patel 1f158d6955 [TargetLowering] add special-case for demanded bits analysis of 'not' ... We treat bitwise 'not' as a special operation and try not to reduce its all-ones mask. Presumably, this is because a 'not' may be cheaper than a generic 'xor' or it may get folded into another logic op if the target has those. However, if we can remove a logic instruction by changing the xor's constant mask value, that should always be a win. Note that the IR version of SimplifyDemandedBits() does not treat 'not' as a special-case currently (although that's marked with a FIXME). So if you run this IR through -instcombine, you should get the same end result. I'm hoping to add a different backend transform that will expose this problem though, so I need to solve this first. Differential Revision: https://reviews.llvm.org/D27356 llvm-svn: 288676		2016-12-05 15:58:21 +00:00
..
CMakeLists.txt	[CMake] NFC. Updating CMake dependency specifications	2016-11-17 04:36:50 +00:00
DAGCombiner.cpp	[DAGCombiner] do not fold (fmul (fadd X, 1), Y) -> (fmad X, Y, Y) by default	2016-12-02 16:06:18 +00:00
FastISel.cpp	IR: Change the gep_type_iterator API to avoid always exposing the "current" type.	2016-12-02 02:24:42 +00:00
FunctionLoweringInfo.cpp	Move most EH from MachineModuleInfo to MachineFunction	2016-12-01 19:32:15 +00:00
InstrEmitter.cpp	SDAG: Make sure we use an allocatable reg class when we create this vreg	2016-10-28 22:42:54 +00:00
InstrEmitter.h	Pass DebugLoc and SDLoc by const ref.	2016-06-12 15:39:02 +00:00
LLVMBuild.txt	…
LegalizeDAG.cpp	Fix spelling mistakes in SelectionDAG comments. NFC.	2016-11-20 13:14:57 +00:00
LegalizeFloatTypes.cpp	[CodeGen] Split out the notions of MI invariance and MI dereferenceability.	2016-09-11 01:38:58 +00:00
LegalizeIntegerTypes.cpp	Integer legalization: fix MUL expansion	2016-11-15 18:29:24 +00:00
LegalizeTypes.cpp	SDAG: Avoid a large, usually empty SmallVector in a recursive function	2016-12-02 00:11:01 +00:00
LegalizeTypes.h	[SelectionDAGBuilder] Support llvm.flt.rounds on targets where i32 is not legal	2016-10-10 20:45:15 +00:00
LegalizeTypesGeneric.cpp	Do not assume that FP vector operands are never legalized by expanding	2016-10-26 19:51:35 +00:00
LegalizeVectorOps.cpp	[VectorLegalizer] Remove EVT::getSizeInBits code duplications. NFCI.	2016-11-21 18:24:44 +00:00
LegalizeVectorTypes.cpp	Type legalization for compressstore and expandload intrinsics.	2016-11-23 13:58:24 +00:00
ResourcePriorityQueue.cpp	Use the range variant of find instead of unpacking begin/end	2016-08-11 22:21:41 +00:00
SDNodeDbgValue.h	Apply clang-tidy's misc-move-constructor-init throughout LLVM.	2016-05-27 14:27:24 +00:00
ScheduleDAGFast.cpp	Replace uint16_t with the MCPhysReg typedef in many places. A lot of physical register arrays already use this typedef.	2015-12-05 07:13:35 +00:00
ScheduleDAGRRList.cpp	Use the range variant of find instead of unpacking begin/end	2016-08-11 22:21:41 +00:00
ScheduleDAGSDNodes.cpp	SelectionDAG: Avoid implicit iterator conversions in ScheduleDAGSDNodes, NFC	2016-07-08 19:07:09 +00:00
ScheduleDAGSDNodes.h	[SelectionDAG] Remove dead code. NFC.	2015-10-15 17:54:06 +00:00
ScheduleDAGVLIW.cpp	…
SelectionDAG.cpp	DAG: Fold out out of bounds insert_vector_elt	2016-12-03 23:03:26 +00:00
SelectionDAGBuilder.cpp	IR: Change the gep_type_iterator API to avoid always exposing the "current" type.	2016-12-02 02:24:42 +00:00
SelectionDAGBuilder.h	Expandload and Compressstore intrinsics	2016-11-03 03:23:55 +00:00
SelectionDAGDumper.cpp	Create llvm.addressofreturnaddress intrinsic	2016-10-12 22:13:19 +00:00
SelectionDAGISel.cpp	Move most EH from MachineModuleInfo to MachineFunction	2016-12-01 19:32:15 +00:00
SelectionDAGPrinter.cpp	Make the SelectionDAG graph printer use SDNode::PersistentId labels.	2015-10-27 23:09:03 +00:00
SelectionDAGTargetInfo.cpp	Rename TargetSelectionDAGInfo into SelectionDAGTargetInfo and move it to CodeGen/	2016-01-27 16:32:26 +00:00
StatepointLowering.cpp	Fix spelling mistakes in SelectionDAG comments. NFC.	2016-11-20 13:14:57 +00:00
StatepointLowering.h	[NFC] Header cleanup	2016-04-18 09:17:29 +00:00
TargetLowering.cpp	[TargetLowering] add special-case for demanded bits analysis of 'not'	2016-12-05 15:58:21 +00:00