llvm-6502/lib/Target/MSP430
Michael J. Spencer 86e05af491 CMake: Fix MSVS build. Although I don't know why this didn't break other build systems...
This problem is unrelated to the recent dependency tracking change. It
seems like noone noticed the problem because I don't think anyone compiles
any target other than X86 on windows.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113727 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-12 18:32:57 +00:00
..
AsmPrinter I got tired of VISIBILITY_HIDDEN colliding with the gcc enum. Rename it 2010-05-11 20:16:09 +00:00
TargetInfo CMake: Fix MSVS build. Although I don't know why this didn't break other build systems... 2010-09-12 18:32:57 +00:00
CMakeLists.txt
Makefile
MSP430.h
MSP430.td
MSP430BranchSelector.cpp tyops 2010-08-23 20:30:51 +00:00
MSP430CallingConv.td
MSP430InstrFormats.td
MSP430InstrInfo.cpp Remove the isMoveInstr() hook. 2010-07-16 22:35:46 +00:00
MSP430InstrInfo.h Remove the isMoveInstr() hook. 2010-07-16 22:35:46 +00:00
MSP430InstrInfo.td fix breakage from r98938 by correctly marking msp430 calls as variadic. 2010-06-24 06:46:50 +00:00
MSP430ISelDAGToDAG.cpp zap dead code. 2010-09-04 18:12:00 +00:00
MSP430ISelLowering.cpp Split the SDValue out of OutputArg so that SelectionDAG-independent 2010-07-07 15:54:55 +00:00
MSP430ISelLowering.h Split the SDValue out of OutputArg so that SelectionDAG-independent 2010-07-07 15:54:55 +00:00
MSP430MachineFunctionInfo.h
MSP430MCAsmInfo.cpp Don't pass StringRef by reference. 2010-07-14 22:38:02 +00:00
MSP430MCAsmInfo.h Don't pass StringRef by reference. 2010-07-14 22:38:02 +00:00
MSP430RegisterInfo.cpp Simplify eliminateFrameIndex() interface back down now that PEI doesn't need 2010-08-26 23:32:16 +00:00
MSP430RegisterInfo.h Simplify eliminateFrameIndex() interface back down now that PEI doesn't need 2010-08-26 23:32:16 +00:00
MSP430RegisterInfo.td Replace the SubRegSet tablegen class with a less error-prone mechanism. 2010-05-26 17:27:12 +00:00
MSP430SelectionDAGInfo.cpp Implement a bunch more TargetSelectionDAGInfo infrastructure. 2010-05-11 17:31:57 +00:00
MSP430SelectionDAGInfo.h Implement a bunch more TargetSelectionDAGInfo infrastructure. 2010-05-11 17:31:57 +00:00
MSP430Subtarget.cpp
MSP430Subtarget.h
MSP430TargetMachine.cpp Implement a bunch more TargetSelectionDAGInfo infrastructure. 2010-05-11 17:31:57 +00:00
MSP430TargetMachine.h Implement a bunch more TargetSelectionDAGInfo infrastructure. 2010-05-11 17:31:57 +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.