[LLVMdev] [cfe-dev] Modify the LLVM front-end to support EFI C and Add LLVM to EFI Byte Code(EBC) target

[Lu Mitnick]

Hello Michael  and all,

So the issue related can be reduced into the two problem:

1. There is no good representation of EBC int in LLVM IR.

2. clang IRGen may have some serious modification.

I know LLVM IR is extensible. Is it possible to add a new type in(natural
int) to represent EFI int and

integrated into clang IRGen??

thanks

yi-hong

2010/12/17 David Chisnall <theraven at sucs.org>

> On 17 Dec 2010, at 03:15, Michael Spencer wrote:
>
> > As long as EFI C isn't radically different from normal C, I would
> > suggest adding a EBC target to LLVM first. Otherwise you have no way
> > to test the clang modifications.
>
>
> As was stated in the last post on this subject, EFI C has integer types
> that have a size determined at run time.  I can't see how this would be
> integrated into the existing IRGen infrastructure in clang without some
> serious modification, nor how you would represent these in LLVM IR.  Mapping
> from a language that has variable-sized ints, to a target that has
> variable-sized ints, via an intermediate representation that does not have
> variable-sized ints would be tricky, I suspect.
>
> David
>
> -- Sent from my PDP-11
>
>
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