[LLVMdev] Add a backend

[suyog sarda]

Hi,

There is a good documentation for writing a backend for sample architecture
CPU0.

Please refer this pdf

https://www.google.co.in/url?sa=t&source=web&rct=j&ei=xhkEVaH-DJO2uATshIKIBw&url=http://jonathan2251.github.io/lbd/TutorialLLVMBackendCpu0.pdf&ved=0CBsQFjAA&usg=AFQjCNFZR2uFivZlsfCuZbMzyJmKJUV7Vg

Regards,
Suyog
Is there documentation somewhere about exactly what the function is
supposed to do, or do I have to figure it out from existing examples?

On Sat, Mar 14, 2015 at 12:13 AM, Anton Korobeynikov <
anton at korobeynikov.info> wrote:

> You have to provide this function and initialize the whole MC
> infrastructure.
>
> See e.g. lib/Target/ARM/MCTargetDesc/ARMMCTargetDesc.cpp
>
> On Sat, Mar 14, 2015 at 10:11 AM, Daniel Dilts <diltsman at gmail.com> wrote:
> > Yes, llvm::InitializeAllTargetMCs(void) does seem to be autogenerated.
> It
> > is _LLVMInitializeFooTargetMC that I can't find documented anywhere.
> >
> > On Sat, Mar 14, 2015 at 12:05 AM, Anton Korobeynikov
> > <anton at korobeynikov.info> wrote:
> >>
> >> This function is autogenerated. You need also to change top-level
> >> configure / cmake files.
> >>
> >> On Sat, Mar 14, 2015 at 8:38 AM, Daniel Dilts <diltsman at gmail.com>
> wrote:
> >> > In attempting to add a backend I came across the documentation here:
> >> > http://llvm.org/docs/WritingAnLLVMBackend.html
> >> >
> >> > The section on the build system seems to be out of date, or maybe I
> >> > don't
> >> > understand it.  I copied the Sparc target to a directory (Foo for the
> >> > example), added Foo to the subdirectories list in
> >> > llvm\lib\Target\LLVMBuild.txt and to LLVM_ALL_TARGETS in
> >> > llvm\CMakeLists.txt.  I removed the files except for
> >> > FooTargetMachine.cpp
> >> > and FooTargetMachine.h.
> >> >
> >> > FooTargetMachine is not completed yet, but I was trying to compile and
> >> > get
> >> > linker errors about _LLVMInitializeFooTargetMC referenced in function
> >> > void
> >> > llvm::InitializeAllTargetMCs(void).  I do not see anything about how
> to
> >> > implement this function.
> >> >
> >> > Is there additional documentation about how to implement a backend
> that
> >> > I am
> >> > missing?
> >> >
> >> > _______________________________________________
> >> > LLVM Developers mailing list
> >> > LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> >> > http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
> >> >
> >>
> >>
> >>
> >> --
> >> With best regards, Anton Korobeynikov
> >> Faculty of Mathematics and Mechanics, Saint Petersburg State University
> >
> >
>
>
>
> --
> With best regards, Anton Korobeynikov
> Faculty of Mathematics and Mechanics, Saint Petersburg State University
>


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