Re: Problems building GNAT on OS X with top-of-tree

[Dale Johannesen <dalej@apple.com>]

On Thursday, October 17, 2002, at 02:38  PM, Geoffrey Keating wrote:
> On Thursday, October 17, 2002, at 02:10  PM, Dale Johannesen wrote:
>>
>> Actually this looks like it is connected to Geoff's recent patch
>> http://gcc.gnu.org/ml/gcc-patches/2002-09/msg01259.html
>> which introduced the LSJR label.  Geoff, is
>> current_function_uses_pic_offset_table not getting set anywhere?
>> That would account for his symptom.
>>
> It is supposed to be set by machopic_function_base_name, which is 
> called to generate the label.  Looking at the code, my suspicion is 
> that  the original load_macho_picbase pattern is getting deleted by 
> flow because it appears dead, but that also deletes the label that the 
> macho_correct_pic needs.
>
> If so, the solution is to use a real CODE_LABEL instead of having the 
> label inside load_macho_picbase, but this will be a complex change.

Hmm.  How do you keep the bcl and the following label together through 
the scheduler?
SCHED_GROUP_P used to work on labels, but it doesn't any more, and I 
never found
another way to do it.  Would a USE of the label work?

>> (This is probably unrelated to your earlier bug.)
>
> Well, it's certainly related, in the sense that if I hadn't fixed that 
> bug this code would now fail at runtime instead of compile-time…

(I meant Geert Bosch's earlier bug, not yours.  Sorry to be unclear.)