Nadav Rotem 0c8607ba6a Revert 172708. ... The optimization handles esoteric cases but adds a lot of complexity both to the X86 backend and to other backends. This optimization disables an important canonicalization of chains of SEXT nodes and makes SEXT and ZEXT asymmetrical. Disabling the canonicalization of consecutive SEXT nodes into a single node disables other DAG optimizations that assume that there is only one SEXT node. The AVX mask optimizations is one example. Additionally this optimization does not update the cost model. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172968 91177308-0d34-0410-b5e6-96231b3b80d8		2013-01-20 08:35:56 +00:00
..
CMakeLists.txt
DAGCombiner.cpp	Revert 172708.	2013-01-20 08:35:56 +00:00
FastISel.cpp	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
FunctionLoweringInfo.cpp	Stack Alignment: throw error if we can't satisfy the minimal alignment	2013-01-10 01:10:10 +00:00
InstrEmitter.cpp	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
InstrEmitter.h
LegalizeDAG.cpp	Refactor to expose RTLIB calls to targets.	2013-01-09 13:18:15 +00:00
LegalizeFloatTypes.cpp	Refactor to expose RTLIB calls to targets.	2013-01-09 13:18:15 +00:00
LegalizeIntegerTypes.cpp	Refactor to expose RTLIB calls to targets.	2013-01-09 13:18:15 +00:00
LegalizeTypes.cpp	Refactor to expose RTLIB calls to targets.	2013-01-09 13:18:15 +00:00
LegalizeTypes.h	Refactor to expose RTLIB calls to targets.	2013-01-09 13:18:15 +00:00
LegalizeTypesGeneric.cpp	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
LegalizeVectorOps.cpp	When lowering an inreg sext first shift left, then right arithmetically.	2013-01-12 19:06:44 +00:00
LegalizeVectorTypes.cpp	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
LLVMBuild.txt
Makefile
ResourcePriorityQueue.cpp
ScheduleDAGFast.cpp	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
ScheduleDAGRRList.cpp	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
ScheduleDAGSDNodes.cpp
ScheduleDAGSDNodes.h
ScheduleDAGVLIW.cpp	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
SDNodeDbgValue.h
SDNodeOrdering.h
SelectionDAG.cpp	Revert 172708.	2013-01-20 08:35:56 +00:00
SelectionDAGBuilder.cpp	Remove unused parameter. Also use the AttributeSet query methods instead of the Attribute query methods.	2013-01-18 21:50:24 +00:00
SelectionDAGBuilder.h	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
SelectionDAGDumper.cpp	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
SelectionDAGISel.cpp	Move TargetTransformInfo to live under the Analysis library. This no	2013-01-07 03:08:10 +00:00
SelectionDAGPrinter.cpp	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
TargetLowering.cpp	Use AttributeSet accessor methods instead of Attribute accessor methods.	2013-01-18 21:53:16 +00:00
TargetSelectionDAGInfo.cpp