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llvm-6502/lib/Target/XCore
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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
..
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 Next round of MC refactoring. This patch factor MC table instantiations, MC 2011-07-14 20:59:42 +00:00
README.txt
XCore.h Next round of MC refactoring. This patch factor MC table instantiations, MC 2011-07-14 20:59:42 +00:00
XCore.td
XCoreAsmPrinter.cpp Implement the emitFrameIndexDebugValue and getDebugValueLocation hooks. 2011-10-11 12:55:35 +00:00
XCoreCallingConv.td Add support for trampolines on the XCore. 2011-02-02 14:57:41 +00:00
XCoreFrameLowering.cpp Move global variables in TargetMachine into new TargetOptions class. As an API 2011-12-02 22:16:29 +00:00
XCoreFrameLowering.h Move getInitialFrameState from TargetFrameInfo to MCAsmInfo (suggestions for 2011-07-18 22:29:13 +00:00
XCoreInstrFormats.td
XCoreInstrInfo.cpp Implement the emitFrameIndexDebugValue and getDebugValueLocation hooks. 2011-10-11 12:55:35 +00:00
XCoreInstrInfo.h Implement the emitFrameIndexDebugValue and getDebugValueLocation hooks. 2011-10-11 12:55:35 +00:00
XCoreInstrInfo.td Fix 80 column violations. 2011-09-23 16:28:10 +00:00
XCoreISelDAGToDAG.cpp Don't fold negative offsets into cp / dp accesses to avoid relocation errors. 2011-11-01 11:31:53 +00:00
XCoreISelLowering.cpp Initial CodeGen support for CTTZ/CTLZ where a zero input produces an 2011-12-13 01:56:10 +00:00
XCoreISelLowering.h Split the init.trampoline intrinsic, which currently combines GCC's 2011-09-06 13:37:06 +00:00
XCoreMachineFunctionInfo.h
XCoreRegisterInfo.cpp Move getInitialFrameState from TargetFrameInfo to MCAsmInfo (suggestions for 2011-07-18 22:29:13 +00:00
XCoreRegisterInfo.h Sink getDwarfRegNum, getLLVMRegNum, getSEHRegNum from TargetRegisterInfo down 2011-07-18 20:57:22 +00:00
XCoreRegisterInfo.td Use set operations instead of plain lists to enumerate register classes. 2011-06-15 23:28:14 +00:00
XCoreSelectionDAGInfo.cpp Implement a bunch more TargetSelectionDAGInfo infrastructure. 2010-05-11 17:31:57 +00:00
XCoreSelectionDAGInfo.h Implement a bunch more TargetSelectionDAGInfo infrastructure. 2010-05-11 17:31:57 +00:00
XCoreSubtarget.cpp Move TargetRegistry and TargetSelect from Target to Support where they belong. 2011-08-24 18:08:43 +00:00
XCoreSubtarget.h Compute feature bits at time of MCSubtargetInfo initialization. 2011-07-07 07:07:08 +00:00
XCoreTargetMachine.cpp Move global variables in TargetMachine into new TargetOptions class. As an API 2011-12-02 22:16:29 +00:00
XCoreTargetMachine.h Move global variables in TargetMachine into new TargetOptions class. As an API 2011-12-02 22:16:29 +00:00
XCoreTargetObjectFile.cpp Remove more duplicated code. 2011-01-23 04:43:11 +00:00
XCoreTargetObjectFile.h

README.txt 

To-do
-----

* Instruction encodings
* Tailcalls
* Investigate loop alignment
* Add builtins