[LLVMdev] Initial cut at a instruction raising patch

[Richard Pennington]

Chris Lattner wrote:
> On Aug 8, 2009, at 1:37 PM, Richard Pennington wrote:
> 
>> Chris Lattner wrote:
>>> 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.
>> Maybe I'm not being very clear. I want this replacement to be done at
>> the very last minute (before unreferenced functions are removed, of
>> course).
> 
> The last possible minute, right before isel, still has arbitrary  
> precision integers.  The right place to do something like this is in  
> the code generator, which is where it happens.
> 
> -Chris

Thanks Chris, my dimly lit bulb has just flickered a little brighter. I 
understand the problem a little more clearly now. I'll pull my pass (or 
at least keep it out of the LLVM tree), since it is of limited general 
utility.

At least I got a chance to try writing a pass. Cool stuff.

-Rich