llvm dev - Jul 2009 - [LLVMdev] Current status of MIPS support (some basic questions)

I am curious- what is the current status of the MIPS support in LLVM? I have a
mipsel device and was wondering if I could compile code for it with clang.

Would I have to implement a backend setup myself?

Is there also an option to compile w/ clang on an x86 for Mipsel?

Thanks in advance.

Hi Carter,

On Mon, Jul 27, 2009 at 12:56 PM, Carter Cheng<carter_cheng at yahoo.com>
wrote:
> I am curious- what is the current status of the MIPS support in LLVM? I
have a mipsel device and was wondering if I could compile code for it with
clang.
It's experimental, but patches are always welcome :)
> Would I have to implement a backend setup myself?
>
> Is there also an option to compile w/ clang on an x86 for Mipsel?
I never tried with clang and I think you would need to add the support.


-- 
Bruno Cardoso Lopes
http://www.brunocardoso.cc

On Mon, Jul 27, 2009 at 8:56 AM, Carter Cheng<carter_cheng at yahoo.com>
wrote:
> Is there also an option to compile w/ clang on an x86 for Mipsel?
A normal build of clang includes limited cross-compile support by
passing in the "-ccc-host-triple" option, although it's still a
bit of
a work-in-progress.  Nobody has added support for any Mips targets,
but it's really easy to patch clang/lib/Basic/Targets.cpp to add a new
target.  Please continue any discussion of this on cfe-dev.

-Eli

Thanks both for the replies. I am primarily considering using clang to test the
backend modifications I may need to make to the experimental code generator to
get it to work on my Mipsel device. I suspect the current backend may need to be
extended to accommodate my needs in this case. Reading the comments in the
backend seems to suggest it support MIPS1-2 and O32 to some extent whereas I
need something along the lines of 64bit MIPS3 support and N32.

--- On Mon, 7/27/09, Eli Friedman <eli.friedman at gmail.com> wrote:
> From: Eli Friedman <eli.friedman at gmail.com>
> Subject: Re: [LLVMdev] Current status of MIPS support (some basic
questions)
> To: "LLVM Developers Mailing List" <llvmdev at cs.uiuc.edu>
> Date: Monday, July 27, 2009, 9:32 AM
> On Mon, Jul 27, 2009 at 8:56 AM,
> Carter Cheng<carter_cheng at yahoo.com>
> wrote:
> > Is there also an option to compile w/ clang on an x86
> for Mipsel?
> 
> A normal build of clang includes limited cross-compile
> support by
> passing in the "-ccc-host-triple" option, although it's
> still a bit of
> a work-in-progress.  Nobody has added support for any
> Mips targets,
> but it's really easy to patch clang/lib/Basic/Targets.cpp
> to add a new
> target.  Please continue any discussion of this on
> cfe-dev.
> 
> -Eli
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