llvm-6502/lib/Target/MSP430
Chandler Carruth d04a8d4b33 Use the new script to sort the includes of every file under lib.
Sooooo many of these had incorrect or strange main module includes.
I have manually inspected all of these, and fixed the main module
include to be the nearest plausible thing I could find. If you own or
care about any of these source files, I encourage you to take some time
and check that these edits were sensible. I can't have broken anything
(I strictly added headers, and reordered them, never removed), but they
may not be the headers you'd really like to identify as containing the
API being implemented.

Many forward declarations and missing includes were added to a header
files to allow them to parse cleanly when included first. The main
module rule does in fact have its merits. =]

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169131 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-03 16:50:05 +00:00
..
InstPrinter Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
MCTargetDesc Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
TargetInfo
CMakeLists.txt
LLVMBuild.txt
Makefile
MSP430.h
MSP430.td
MSP430AsmPrinter.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
MSP430BranchSelector.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
MSP430CallingConv.td Add support for byval args. Patch by Job Noorman! 2012-11-21 17:23:03 +00:00
MSP430FrameLowering.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
MSP430FrameLowering.h Fix fallout from RegInfo => FrameLowering refactoring on MSP430. 2012-10-17 17:37:11 +00:00
MSP430InstrFormats.td
MSP430InstrInfo.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
MSP430InstrInfo.h
MSP430InstrInfo.td
MSP430ISelDAGToDAG.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
MSP430ISelLowering.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
MSP430ISelLowering.h Add support for varargs functions for msp430. 2012-11-21 17:28:27 +00:00
MSP430MachineFunctionInfo.cpp
MSP430MachineFunctionInfo.h Add support for varargs functions for msp430. 2012-11-21 17:28:27 +00:00
MSP430MCInstLower.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
MSP430MCInstLower.h
MSP430RegisterInfo.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
MSP430RegisterInfo.h Fix fallout from RegInfo => FrameLowering refactoring on MSP430. 2012-10-17 17:37:11 +00:00
MSP430RegisterInfo.td
MSP430SelectionDAGInfo.cpp
MSP430SelectionDAGInfo.h
MSP430Subtarget.cpp
MSP430Subtarget.h
MSP430TargetMachine.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
MSP430TargetMachine.h Reapply the TargerTransformInfo changes, minus the changes to LSR and Lowerinvoke. 2012-10-18 23:22:48 +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.