llvm-6502/lib/Target/MSP430
Chandler Carruth 42e8630239 [Modules] Fix potential ODR violations by sinking the DEBUG_TYPE
definition below all of the header #include lines, lib/Target/...
edition.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206842 91177308-0d34-0410-b5e6-96231b3b80d8
2014-04-22 02:41:26 +00:00
..
InstPrinter [Modules] Fix potential ODR violations by sinking the DEBUG_TYPE 2014-04-22 02:41:26 +00:00
MCTargetDesc [cleanup] Lift using directives, DEBUG_TYPE definitions, and even some 2014-04-22 02:03:14 +00:00
TargetInfo
CMakeLists.txt
LLVMBuild.txt
Makefile
MSP430.h
MSP430.td
MSP430AsmPrinter.cpp [Modules] Fix potential ODR violations by sinking the DEBUG_TYPE 2014-04-22 02:41:26 +00:00
MSP430BranchSelector.cpp [Modules] Fix potential ODR violations by sinking the DEBUG_TYPE 2014-04-22 02:41:26 +00:00
MSP430CallingConv.td
MSP430FrameLowering.cpp [C++11] Replace llvm::next and llvm::prior with std::next and std::prev. 2014-03-02 12:27:27 +00:00
MSP430FrameLowering.h
MSP430InstrFormats.td
MSP430InstrInfo.cpp [cleanup] Lift using directives, DEBUG_TYPE definitions, and even some 2014-04-22 02:03:14 +00:00
MSP430InstrInfo.h
MSP430InstrInfo.td
MSP430ISelDAGToDAG.cpp [Modules] Make Support/Debug.h modular. This requires it to not change 2014-04-21 22:55:11 +00:00
MSP430ISelLowering.cpp [Modules] Fix potential ODR violations by sinking the DEBUG_TYPE 2014-04-22 02:41:26 +00:00
MSP430ISelLowering.h
MSP430MachineFunctionInfo.cpp
MSP430MachineFunctionInfo.h
MSP430MCInstLower.cpp Move the llvm mangler to lib/IR. 2014-01-07 21:19:40 +00:00
MSP430MCInstLower.h
MSP430RegisterInfo.cpp [Modules] Fix potential ODR violations by sinking the DEBUG_TYPE 2014-04-22 02:41:26 +00:00
MSP430RegisterInfo.h Make consistent use of MCPhysReg instead of uint16_t throughout the tree. 2014-04-04 05:16:06 +00:00
MSP430RegisterInfo.td
MSP430SelectionDAGInfo.cpp [Modules] Fix potential ODR violations by sinking the DEBUG_TYPE 2014-04-22 02:41:26 +00:00
MSP430SelectionDAGInfo.h
MSP430Subtarget.cpp [cleanup] Lift using directives, DEBUG_TYPE definitions, and even some 2014-04-22 02:03:14 +00:00
MSP430Subtarget.h
MSP430TargetMachine.cpp Make the llvm mangler depend only on DataLayout. 2014-01-03 19:21:54 +00:00
MSP430TargetMachine.h
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.