llvm dev - Mar 2015 - [LLVMdev] a question to backend

Hi, all

I am writting a new backend for a 8-bits target machine(8051). Because the most
backends supported by LLVM are for 32-bits targets, most of implementations for
16/32 bits operating had to depend on runtime libraries. In this case, it will
decrease the generated code efficency. I found that the LLVM 2.5 supported the
PIC16, but the lastest version do not support 8-bits target.  What is the
purpose to this change?  Dose it mean that the existing LLVM backend are not
available to write 8-bits/16-bits bankend? Thanks a lot.

--------------
Steven.
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You might want to have a look at a fairly up to date and actively developed
out of tree llvm back end for another 8 bit microcontroller, the AVR

https://github.com/avr-llvm/llvm


On Thu, Mar 19, 2015 at 7:26 PM, <qiuw at ichaier.com> wrote:
> Hi, all
>
> I am writting a new backend for a 8-bits target machine(8051). Because the
> most backends supported by LLVM are for 32-bits targets, most of
> implementations for 16/32 bits operating had to depend on runtime
> libraries. In this case, it will decrease the generated code efficency. I
> found that the LLVM 2.5 supported the PIC16, but the lastest version do not
> support 8-bits target.  What is the purpose to this change?  Dose it mean
> that the existing LLVM backend are not available to write 8-bits/16-bits
> bankend? Thanks a lot.
>
> --------------
> Steven.
> ***************************** Legal Disclaimer
> *****************************
> "This email may contain confidential and privileged material for the
sole
> use of the intended recipient. Any unauthorized review, use or distribution
> by others is strictly prohibited. If you have received the message in
> error,
> please advise the sender by reply email and delete the message. Thank
you."
>
>
> _______________________________________________
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