llvm-6502/lib/Target/MSP430
Oscar Fuentes 4ebc5916e9 Explicitly declare a library dependency of LLVM*Desc to
LLVM*AsmPrinter.

GenLibDeps.pl fails to detect vtable references. As this is the only
referenced symbol from LLVM*Desc to LLVM*AsmPrinter on optimized
builds, the algorithm that creates the list of libraries to be linked
into tools doesn't know about the dependency and sometimes places the
libraries on the wrong order, yielding error messages like this:

../../lib/libLLVMARMDesc.a(ARMMCTargetDesc.cpp.o): In function
`llvm::ARMInstPrinter::ARMInstPrinter(llvm::MCAsmInfo const&)':
ARMMCTargetDesc.cpp:(.text._ZN4llvm14ARMInstPrinterC1ERKNS_9MCAsmInfoE
[llvm::ARMInstPrinter::ARMInstPrinter(llvm::MCAsmInfo
const&)]+0x2a): undefined reference to `vtable for
llvm::ARMInstPrinter'

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136328 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-28 02:33:52 +00:00
..
InstPrinter Clean up a pile of hacks in our CMake build relating to TableGen. 2011-07-26 00:09:08 +00:00
MCTargetDesc Explicitly declare a library dependency of LLVM*Desc to 2011-07-28 02:33:52 +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 Clean up a pile of hacks in our CMake build relating to TableGen. 2011-07-26 00:09:08 +00:00
Makefile Next round of MC refactoring. This patch factor MC table instantiations, MC 2011-07-14 20:59:42 +00:00
MSP430.h Next round of MC refactoring. This patch factor MC table instantiations, MC 2011-07-14 20:59:42 +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 Separate MCInstPrinter registration from AsmPrinter registration. 2011-07-25 21:20:24 +00:00
MSP430BranchSelector.cpp tyops 2010-08-23 20:30:51 +00:00
MSP430CallingConv.td
MSP430FrameLowering.cpp Teach frame lowering to ignore debug values after the terminators. 2011-01-13 21:28:52 +00:00
MSP430FrameLowering.h Rename TargetFrameInfo into TargetFrameLowering. Also, put couple of FIXMEs and fixes here and there. 2011-01-10 12:39:04 +00:00
MSP430InstrFormats.td Replace TSFlagsFields and TSFlagsShifts with a simpler TSFlags field. 2010-04-05 03:10:20 +00:00
MSP430InstrInfo.cpp Next round of MC refactoring. This patch factor MC table instantiations, MC 2011-07-14 20:59:42 +00:00
MSP430InstrInfo.h Hide the call to InitMCInstrInfo into tblgen generated ctor. 2011-07-01 17:57:27 +00:00
MSP430InstrInfo.td Flag -> Glue, the ongoing saga 2010-12-23 18:28:41 +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 land David Blaikie's patch to de-constify Type, with a few tweaks. 2011-07-18 04:54:35 +00:00
MSP430ISelLowering.h land David Blaikie's patch to de-constify Type, with a few tweaks. 2011-07-18 04:54:35 +00:00
MSP430MachineFunctionInfo.h Add lowering of returnaddr and frameaddr intrinsics. Shamelessly stolen from x86 :) 2009-12-07 02:28:10 +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 Sink getDwarfRegNum, getLLVMRegNum, getSEHRegNum from TargetRegisterInfo down 2011-07-18 20:57:22 +00:00
MSP430RegisterInfo.h Sink getDwarfRegNum, getLLVMRegNum, getSEHRegNum from TargetRegisterInfo down 2011-07-18 20:57:22 +00:00
MSP430RegisterInfo.td Use set operations instead of plain lists to enumerate register classes. 2011-06-15 23:28:14 +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 Next round of MC refactoring. This patch factor MC table instantiations, MC 2011-07-14 20:59:42 +00:00
MSP430Subtarget.h Compute feature bits at time of MCSubtargetInfo initialization. 2011-07-07 07:07:08 +00:00
MSP430TargetMachine.cpp - Move CodeModel from a TargetMachine global option to MCCodeGenInfo. 2011-07-20 07:51:56 +00:00
MSP430TargetMachine.h - Move CodeModel from a TargetMachine global option to MCCodeGenInfo. 2011-07-20 07:51:56 +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.