[LLVMdev] Initial cut at a instruction raising patch

[Chris Lattner]

On Aug 8, 2009, at 11:48 AM, Richard Pennington wrote:

> Chris Lattner wrote:
>> On Aug 8, 2009, at 8:37 AM, Richard Pennington wrote:
>>
>>> Hi,
>>>
>>> This patch raises selected instructions to function calls. I've dome
>>> some preliminary testing and I works:
>>
>> Out of curiosity, why do you want this?
>>
>
> I do bitcode linking of a whole program, including the soft-float and
> other support routines that a processor needs. During IPO, the unused
> support functions are removed and are gone by the time code generation
> happens.
>
> I'd like to run this pass to insure that the functions are referenced
> properly.
>
> Ideally I'd like to run this pass after inlining and folding, etc. But
> it seems to work OK if I run it about the same time internalize is  
> run.

How do you plan to handle things like arbitrary precision integers,  
etc?  It seems like you'll end up duplicating a ton of codegen logic  
to handle this.

-Chris