[llvm-dev] [GlobalISel] Why GlobalISel does not support big endian ISA?

[Sheng Yan Chen via llvm-dev]

Hi,

I've searched mailing list for this question and couldn't find helpful information.

My question:

- Why GlobalISel does not support big endian ISA ? 

- Which part doesn't support ? IRTranslator ? Legalizer ? Instruction Selector ?

- Will it support big endian in the future ?

- How hard the work will be ? Can rookie like me have the chance to contribute and improve ?

Thanks for reading this question ! Have a nice day !

Sheng

[Chris Sears via llvm-dev]

Sheng,

MC68000 is big endian and the M68k backend supports GlobalISel.

Chris

--

Ite Ursi

[Sheng Yan Chen via llvm-dev]

Hi,

Thanks for answering my question :) 

AFAIK, M68K has no fully support on GISel.

The functionality is very limited, it can't even lower function call.

I'm currently trying to implement that by the way. 

Thanks :)

Sheng