llvm-project/llvm/lib/Target/MSP430
Craig Topper 481fb2879f Convert SelectionDAG::SelectNodeTo to use ArrayRef.
llvm-svn: 207377
2014-04-27 19:21:11 +00:00
..
InstPrinter [Modules] Fix potential ODR violations by sinking the DEBUG_TYPE 2014-04-22 02:41:26 +00:00
MCTargetDesc [C++] Use 'nullptr'. Target edition. 2014-04-25 05:30:21 +00:00
TargetInfo Prune redundant dependencies in LLVMBuild.txt. 2013-12-11 00:30:57 +00:00
CMakeLists.txt [CMake] Let add_public_tablegen_target() provide intrinsics_gen, too. 2013-11-28 17:04:31 +00:00
LLVMBuild.txt
MSP430.h
MSP430.td Change the default of AsmWriterClassName and isMCAsmWriter. 2013-12-02 04:55:42 +00:00
MSP430AsmPrinter.cpp [C++] Use 'nullptr'. Target edition. 2014-04-25 05:30:21 +00:00
MSP430BranchSelector.cpp [Modules] Fix potential ODR violations by sinking the DEBUG_TYPE 2014-04-22 02:41:26 +00:00
MSP430CallingConv.td Fix MSP430 calling convention to match MSPGCC 2013-10-15 08:19:39 +00:00
MSP430FrameLowering.cpp [C++] Use 'nullptr'. Target edition. 2014-04-25 05:30:21 +00:00
MSP430FrameLowering.h Make sure SP is always aligned on a 2 byte boundary 2013-10-24 09:32:31 +00:00
MSP430ISelDAGToDAG.cpp Convert SelectionDAG::SelectNodeTo to use ArrayRef. 2014-04-27 19:21:11 +00:00
MSP430ISelLowering.cpp Convert SelectionDAG::getNode methods to use ArrayRef<SDValue>. 2014-04-26 18:35:24 +00:00
MSP430ISelLowering.h Add jump tables handling for MSP430. 2013-07-01 19:44:44 +00:00
MSP430InstrFormats.td
MSP430InstrInfo.cpp [C++] Use 'nullptr'. Target edition. 2014-04-25 05:30:21 +00:00
MSP430InstrInfo.h [weak vtables] Remove a bunch of weak vtables 2013-11-19 00:57:56 +00:00
MSP430InstrInfo.td Use conventional syntax for branches. 2013-07-14 18:19:44 +00:00
MSP430MCInstLower.cpp Move the llvm mangler to lib/IR. 2014-01-07 21:19:40 +00:00
MSP430MCInstLower.h
MSP430MachineFunctionInfo.cpp
MSP430MachineFunctionInfo.h Add support for varargs functions for msp430. 2012-11-21 17:28:27 +00:00
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 Make SubRegIndex size mandatory, following r183020. 2013-05-31 23:45:26 +00:00
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 Switch TargetTransformInfo from an immutable analysis pass that requires 2013-01-07 01:37:14 +00:00
Makefile
README.txt

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.