llvm-6502/lib/Target/MSP430
2009-09-19 09:51:03 +00:00
..
AsmPrinter remove all but one reference to TargetRegisterDesc::AsmName. 2009-09-13 20:31:40 +00:00
TargetInfo Factor commonality in triple match routines into helper template for registering 2009-07-26 05:03:33 +00:00
CMakeLists.txt Normalize makefile comments and sort cmake file lists. 2009-08-31 13:05:24 +00:00
Makefile Give MSP430 a separate asmprinter lib 2009-08-14 18:28:12 +00:00
MSP430.h Add new helpers for registering targets. 2009-07-25 06:49:55 +00:00
MSP430.td Add first draft of MSP430 calling convention stuff and draft of ISD::FORMAL_ARGUMENTS node lowering. 2009-05-03 12:59:33 +00:00
MSP430CallingConv.td Hanle i8 returns 2009-05-03 13:11:48 +00:00
MSP430InstrFormats.td
MSP430InstrInfo.cpp llvm_unreachable->llvm_unreachable(0), LLVM_UNREACHABLE->llvm_unreachable. 2009-07-14 16:55:14 +00:00
MSP430InstrInfo.h Add InsertBranch() hook for tail mergeing 2009-05-03 13:15:22 +00:00
MSP430InstrInfo.td Special constants as destinations does not work as expected - drop the patterns. 2009-08-05 14:42:00 +00:00
MSP430ISelDAGToDAG.cpp Fix some refactos for iostream changes (in -Asserts mode). 2009-08-23 08:50:52 +00:00
MSP430ISelLowering.cpp Fix PR4926. When target hook EmitInstrWithCustomInserter() insert new basic blocks and update CFG, it should also inform sdisel of the changes so the phi source operands will come from the right basic blocks. 2009-09-19 09:51:03 +00:00
MSP430ISelLowering.h Enhance EmitInstrWithCustomInserter() so target can specify CFG changes that sdisel will use to properly complete phi nodes. 2009-09-18 21:02:19 +00:00
MSP430MachineFunctionInfo.h Add explicit keywords. 2009-06-05 23:05:51 +00:00
MSP430MCAsmInfo.cpp Allow symbols to start from the digit if target requests it. This allows, e.g. pinning 2009-09-18 16:57:42 +00:00
MSP430MCAsmInfo.h Rename TargetAsmInfo (and its subclasses) to MCAsmInfo. 2009-08-22 20:48:53 +00:00
MSP430RegisterInfo.cpp Remove some unused variables and methods warned about by 2009-09-06 08:33:48 +00:00
MSP430RegisterInfo.h Give getPointerRegClass() a "kind" value so that targets can 2009-07-29 20:31:52 +00:00
MSP430RegisterInfo.td Add normal and trunc stores 2009-05-03 13:06:26 +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 Rename TargetAsmInfo (and its subclasses) to MCAsmInfo. 2009-08-22 20:48:53 +00:00
MSP430TargetMachine.h Change TargetAsmInfo to be constructed via TargetRegistry from a Target+Triple 2009-08-12 07:22:17 +00:00
README.txt Add TODO list :) 2009-05-03 13:19:24 +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):

0. Implement asmprinting for variables :)

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.