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
..
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
Mips64InstrInfo.td	Rename WrapperPIC. It is now used for both pic and static.	2011-12-09 01:53:17 +00:00
Mips.h
Mips.td	Change names for MIPS "generic" processors defined in Mips.td to match what GNU	2011-11-29 23:08:41 +00:00
MipsAsmPrinter.cpp	Add bundle aware API for querying instruction properties and switch the code	2011-12-07 07:15:52 +00:00
MipsAsmPrinter.h
MipsCallingConv.td
MipsCodeEmitter.cpp	Add bundle aware API for querying instruction properties and switch the code	2011-12-07 07:15:52 +00:00
MipsCondMov.td
MipsDelaySlotFiller.cpp	Add bundle aware API for querying instruction properties and switch the code	2011-12-07 07:15:52 +00:00
MipsEmitGPRestore.cpp
MipsExpandPseudo.cpp
MipsFrameLowering.cpp	Move global variables in TargetMachine into new TargetOptions class. As an API	2011-12-02 22:16:29 +00:00
MipsFrameLowering.h
MipsInstrFormats.td	Use branches instead of jumps + variable cleanup. Testcase coming next. Patch by Jack Carter	2011-12-06 03:34:48 +00:00
MipsInstrFPU.td
MipsInstrInfo.cpp	Emit B (unconditional branch) when -relocation-model=pic and J (jump) when	2011-12-12 22:39:35 +00:00
MipsInstrInfo.h	Emit B (unconditional branch) when -relocation-model=pic and J (jump) when	2011-12-12 22:39:35 +00:00
MipsInstrInfo.td	Emit B (unconditional branch) when -relocation-model=pic and J (jump) when	2011-12-12 22:39:35 +00:00
MipsISelDAGToDAG.cpp	Rename WrapperPIC. It is now used for both pic and static.	2011-12-09 01:53:17 +00:00
MipsISelLowering.cpp	Initial CodeGen support for CTTZ/CTLZ where a zero input produces an	2011-12-13 01:56:10 +00:00
MipsISelLowering.h	Rename WrapperPIC. It is now used for both pic and static.	2011-12-09 01:53:17 +00:00
MipsJITInfo.cpp
MipsJITInfo.h
MipsMachineFunction.h
MipsMCInstLower.cpp	Add a few moreLocal/Global R_MIPS_GOT related fixups and	2011-12-07 00:28:57 +00:00
MipsMCInstLower.h
MipsRegisterInfo.cpp	Add register HWR29 numbering. Patch by Jack Carter	2011-12-06 03:34:36 +00:00
MipsRegisterInfo.h
MipsRegisterInfo.td	Add newline.	2011-12-07 23:26:03 +00:00
MipsRelocations.h
MipsSchedule.td
MipsSelectionDAGInfo.cpp
MipsSelectionDAGInfo.h
MipsSubtarget.cpp	Change names for MIPS "generic" processors defined in Mips.td to match what GNU	2011-11-29 23:08:41 +00:00
MipsSubtarget.h
MipsTargetMachine.cpp	Move global variables in TargetMachine into new TargetOptions class. As an API	2011-12-02 22:16:29 +00:00
MipsTargetMachine.h	Move global variables in TargetMachine into new TargetOptions class. As an API	2011-12-02 22:16:29 +00:00
MipsTargetObjectFile.cpp
MipsTargetObjectFile.h