[cfe-dev] Fwd: external function codegen bug

[Chris Lattner]

On May 23, 2008, at 4:26 PM, Eli Friedman wrote:

>> One approach would be to have two predicates: one for "real i-c-e"  
>> and one
>> for "gcc i-c-e".  If it is a GCC ICE but not a standards one,  
>> accept but
>> emit a diagnostic?  In this case, it is pretty easy, in other cases  
>> (such as
>> when dealing with ?: promotion rules) it is much harder.
>>
>> I don't know if it is worth it though.  The set of stuff accepted  
>> by GCC is,
>> uh, "poorly defined".
>>
>> -Chris
>
> Wrong thread?

Hrm, yeah, how about that.  Email is hard for me, very technical and  
stuff.

> In reply to what you're saying though, I think it isn't worth it
> unless it turns out to be a common construct, because it's difficult
> to contain all the effects of deciding something is a "gcc i-c-e";
> this case is easy, but stuff starts getting more complicated fast.
> Besides, once/if we start properly supporting FP rounding modes, we
> can actually end up with wrong code.

Ok.

-Chris