Chandler Carruth 63974b2144 Initial CodeGen support for CTTZ/CTLZ where a zero input produces an ... undefined result. This adds new ISD nodes for the new semantics, selecting them when the LLVM intrinsic indicates that the undef behavior is desired. The new nodes expand trivially to the old nodes, so targets don't actually need to do anything to support these new nodes besides indicating that they should be expanded. I've done this for all the operand types that I could figure out for all the targets. Owners of various targets, please review and let me know if any of these are incorrect. Note that the expand behavior is *conservatively correct*, and exactly matches LLVM's current behavior with these operations. Ideally this patch will not change behavior in any way. For example the regtest suite finds the exact same instruction sequences coming out of the code generator. That's why there are no new tests here -- all of this is being exercised by the existing test suite. Thanks to Duncan Sands for reviewing the various bits of this patch and helping me get the wrinkles ironed out with expanding for each target. Also thanks to Chris for clarifying through all the discussions that this is indeed the approach he was looking for. That said, there are likely still rough spots. Further review much appreciated. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146466 91177308-0d34-0410-b5e6-96231b3b80d8		2011-12-13 01:56:10 +00:00
..
AsmParser	LLVMBuild: Remove trailing newline, which irked me.	2011-12-12 19:48:00 +00:00
Disassembler	LLVMBuild: Remove trailing newline, which irked me.	2011-12-12 19:48:00 +00:00
InstPrinter	LLVMBuild: Remove trailing newline, which irked me.	2011-12-12 19:48:00 +00:00
MCTargetDesc	LLVMBuild: Remove trailing newline, which irked me.	2011-12-12 19:48:00 +00:00
TargetInfo	LLVMBuild: Remove trailing newline, which irked me.	2011-12-12 19:48:00 +00:00
CMakeLists.txt	build/CMake: Finish removal of add_llvm_library_dependencies.	2011-11-29 19:25:30 +00:00
LLVMBuild.txt	LLVMBuild: Introduce a common section which currently has a list of the	2011-12-12 22:45:54 +00:00
Makefile
MBlaze.h	Refactor MBlaze target to separate MC routines from Target routines.	2011-07-25 20:18:18 +00:00
MBlaze.td
MBlazeAsmPrinter.cpp	Add bundle aware API for querying instruction properties and switch the code	2011-12-07 07:15:52 +00:00
MBlazeCallingConv.td
MBlazeDelaySlotFiller.cpp	Add bundle aware API for querying instruction properties and switch the code	2011-12-07 07:15:52 +00:00
MBlazeELFWriterInfo.cpp	Fix improperly formed assert() call.	2011-10-17 20:22:59 +00:00
MBlazeELFWriterInfo.h
MBlazeFrameLowering.cpp	Move global variables in TargetMachine into new TargetOptions class. As an API	2011-12-02 22:16:29 +00:00
MBlazeFrameLowering.h
MBlazeInstrFormats.td	Add several new instructions supported by the latest MicroBlaze.	2011-11-27 05:16:58 +00:00
MBlazeInstrFPU.td
MBlazeInstrFSL.td
MBlazeInstrInfo.cpp	Fix a couple of 80 column violations.	2011-09-23 17:24:41 +00:00
MBlazeInstrInfo.h	Refactor MBlaze target to separate MC routines from Target routines.	2011-07-25 20:18:18 +00:00
MBlazeInstrInfo.td	Add several new instructions supported by the latest MicroBlaze.	2011-11-27 05:16:58 +00:00
MBlazeIntrinsicInfo.cpp	Use a SmallVector for intrinsic argument types.	2011-10-17 21:33:26 +00:00
MBlazeIntrinsicInfo.h	land David Blaikie's patch to de-constify Type, with a few tweaks.	2011-07-18 04:54:35 +00:00
MBlazeIntrinsics.td
MBlazeISelDAGToDAG.cpp
MBlazeISelLowering.cpp	Initial CodeGen support for CTTZ/CTLZ where a zero input produces an	2011-12-13 01:56:10 +00:00
MBlazeISelLowering.h	Add codegen support for vector select (in the IR this means a select	2011-09-06 19:07:46 +00:00
MBlazeMachineFunction.h
MBlazeMCInstLower.cpp	Rename a couple of options and fix some simple typos.	2011-11-26 21:50:38 +00:00
MBlazeMCInstLower.h
MBlazeRegisterInfo.cpp	Refactoring fail.	2011-07-25 22:16:37 +00:00
MBlazeRegisterInfo.h	Refactoring fail.	2011-07-25 22:16:37 +00:00
MBlazeRegisterInfo.td
MBlazeRelocations.h
MBlazeSchedule3.td
MBlazeSchedule5.td
MBlazeSchedule.td
MBlazeSelectionDAGInfo.cpp
MBlazeSelectionDAGInfo.h
MBlazeSubtarget.cpp	Move TargetRegistry and TargetSelect from Target to Support where they belong.	2011-08-24 18:08:43 +00:00
MBlazeSubtarget.h
MBlazeTargetMachine.cpp	Move global variables in TargetMachine into new TargetOptions class. As an API	2011-12-02 22:16:29 +00:00
MBlazeTargetMachine.h	Move global variables in TargetMachine into new TargetOptions class. As an API	2011-12-02 22:16:29 +00:00
MBlazeTargetObjectFile.cpp	land David Blaikie's patch to de-constify Type, with a few tweaks.	2011-07-18 04:54:35 +00:00
MBlazeTargetObjectFile.h
TODO