llvm-6502/lib/Target/MSP430
2011-07-07 07:07:08 +00:00
..
InstPrinter createMCInstPrinter doesn't need TargetMachine anymore. 2011-07-06 19:45:42 +00:00
TargetInfo
CMakeLists.txt Rename XXXGenSubtarget.inc to XXXGenSubtargetInfo.inc for consistency. 2011-07-01 22:36:09 +00:00
Makefile Rename XXXGenSubtarget.inc to XXXGenSubtargetInfo.inc for consistency. 2011-07-01 22:36:09 +00:00
MSP430.h Merge XXXGenRegisterNames.inc into XXXGenRegisterInfo.inc 2011-06-28 20:07:07 +00:00
MSP430.td
MSP430AsmPrinter.cpp createMCInstPrinter doesn't need TargetMachine anymore. 2011-07-06 19:45:42 +00:00
MSP430BranchSelector.cpp
MSP430CallingConv.td
MSP430FrameLowering.cpp Teach frame lowering to ignore debug values after the terminators. 2011-01-13 21:28:52 +00:00
MSP430FrameLowering.h Rename TargetFrameInfo into TargetFrameLowering. Also, put couple of FIXMEs and fixes here and there. 2011-01-10 12:39:04 +00:00
MSP430InstrFormats.td
MSP430InstrInfo.cpp Hide the call to InitMCInstrInfo into tblgen generated ctor. 2011-07-01 17:57:27 +00:00
MSP430InstrInfo.h Hide the call to InitMCInstrInfo into tblgen generated ctor. 2011-07-01 17:57:27 +00:00
MSP430InstrInfo.td
MSP430ISelDAGToDAG.cpp
MSP430ISelLowering.cpp Add a parameter to CCState so that it can access the MachineFunction. 2011-06-08 23:55:35 +00:00
MSP430ISelLowering.h Make the logic for determining function alignment more explicit. No functionality change. 2011-05-06 20:34:06 +00:00
MSP430MachineFunctionInfo.h
MSP430MCAsmInfo.cpp
MSP430MCAsmInfo.h
MSP430MCInstLower.cpp
MSP430MCInstLower.h
MSP430RegisterInfo.cpp Move CallFrameSetupOpcode and CallFrameDestroyOpcode to TargetInstrInfo. 2011-06-28 21:14:33 +00:00
MSP430RegisterInfo.h Merge XXXGenRegisterDesc.inc XXXGenRegisterNames.inc XXXGenRegisterInfo.h.inc 2011-06-27 18:32:37 +00:00
MSP430RegisterInfo.td Use set operations instead of plain lists to enumerate register classes. 2011-06-15 23:28:14 +00:00
MSP430SelectionDAGInfo.cpp
MSP430SelectionDAGInfo.h
MSP430Subtarget.cpp Compute feature bits at time of MCSubtargetInfo initialization. 2011-07-07 07:07:08 +00:00
MSP430Subtarget.h Compute feature bits at time of MCSubtargetInfo initialization. 2011-07-07 07:07:08 +00:00
MSP430TargetMachine.cpp Fix the ridiculous SubtargetFeatures API where it implicitly expects CPU name to 2011-06-30 01:53:36 +00:00
MSP430TargetMachine.h Fix the ridiculous SubtargetFeatures API where it implicitly expects CPU name to 2011-06-30 01:53:36 +00:00
README.txt

//===---------------------------------------------------------------------===//
// MSP430 backend.
//===---------------------------------------------------------------------===//

DISCLAIMER: Thid backend should be considered as highly experimental. I never
seen nor worked with this MCU, all information was gathered from datasheet
only. The original intention of making this backend was to write documentation
of form "How to write backend for dummies" :) Thes notes hopefully will be
available pretty soon.

Some things are incomplete / not implemented yet (this list surely is not
complete as well):

1. Verify, how stuff is handling implicit zext with 8 bit operands (this might
be modelled currently in improper way - should we need to mark the superreg as
def for every 8 bit instruction?).

2. Libcalls: multiplication, division, remainder. Note, that calling convention
for libcalls is incomptible with calling convention of libcalls of msp430-gcc
(these cannot be used though due to license restriction).

3. Implement multiplication / division by constant (dag combiner hook?).

4. Implement non-constant shifts.

5. Implement varargs stuff.

6. Verify and fix (if needed) how's stuff playing with i32 / i64.

7. Implement floating point stuff (softfp?)

8. Implement instruction encoding for (possible) direct code emission in the
future.

9. Since almost all instructions set flags - implement brcond / select in better
way (currently they emit explicit comparison).

10. Handle imm in comparisons in better way (see comment in MSP430InstrInfo.td)

11. Implement hooks for better memory op folding, etc.