llvm-6502/lib/Target/MSP430
Jim Grosbach 33caa07cc5 Re-apply r115363 and r115366 now that r115525 has removed the un-needed header
that caused the circular dependencies on Linux.

Built OK for me on OSX and Linux (Ubuntu) with configure/make and CMake. Will
keep an eye on the bots....

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115582 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-05 00:34:11 +00:00
..
InstPrinter Re-apply r115363 and r115366 now that r115525 has removed the un-needed header 2010-10-05 00:34:11 +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 Re-apply r115363 and r115366 now that r115525 has removed the un-needed header 2010-10-05 00:34:11 +00:00
Makefile Re-apply r115363 and r115366 now that r115525 has removed the un-needed header 2010-10-05 00:34:11 +00:00
MSP430.h Add branch relaxation pass (shamelessly stolen from PPC). 2010-01-15 21:19:05 +00:00
MSP430.td Clean up asm writer usage for x86 and msp430 to flag that the writer should 2010-09-30 23:40:25 +00:00
MSP430AsmPrinter.cpp Re-apply r115363 and r115366 now that r115525 has removed the un-needed header 2010-10-05 00:34:11 +00:00
MSP430BranchSelector.cpp tyops 2010-08-23 20:30:51 +00:00
MSP430CallingConv.td
MSP430InstrFormats.td Replace TSFlagsFields and TSFlagsShifts with a simpler TSFlags field. 2010-04-05 03:10:20 +00:00
MSP430InstrInfo.cpp convert targets to the new MF.getMachineMemOperand interface. 2010-09-21 04:39:43 +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 fix a long standing wart: all the ComplexPattern's were being 2010-09-21 20:31:19 +00:00
MSP430ISelLowering.cpp update a bunch of code to use the MachinePointerInfo version of getStore. 2010-09-21 18:41:36 +00:00
MSP430ISelLowering.h Split the SDValue out of OutputArg so that SelectionDAG-independent 2010-07-07 15:54:55 +00:00
MSP430MachineFunctionInfo.h Add lowering of returnaddr and frameaddr intrinsics. Shamelessly stolen from x86 :) 2009-12-07 02:28:10 +00:00
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
MSP430MCInstLower.cpp Re-apply r115363 and r115366 now that r115525 has removed the un-needed header 2010-10-05 00:34:11 +00:00
MSP430MCInstLower.h Re-apply r115363 and r115366 now that r115525 has removed the un-needed header 2010-10-05 00:34:11 +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 Normalize Subtarget constructors to take a target triple string instead of 2009-08-02 22:11:08 +00:00
MSP430Subtarget.h Normalize Subtarget constructors to take a target triple string instead of 2009-08-02 22:11:08 +00:00
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 Some preliminary variable asmprinting 2009-11-07 17:12:58 +00:00

//===---------------------------------------------------------------------===//
// 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.