[cfe-dev] linux/i386 and mregparm

[Dimitry Andric]

On 2011-03-01 02:30, Eli Friedman wrote:
>> 6. weak functions and optimization
>>
>> it appears to be yet another bug in that when a weak function with an empty body
>> is encountered in a compilation unit, the optimizer assumes that that's there is
>> to this function and omits passing arguments to calls to the weak function (and
>> presumably non-empty bodies would trigger other kind of optimizations not necessarily
>> valid for the overrides).
>>
>> obviously this is incorrect since the whole point of a weak function is that it
>> can be overridden in another compilation unit and therefore no assumptions can be
>> made about it in the optimizer. this particular problem arises in linux in a few
>> places as weak functions are sometimes used to implement arch specific overrides.
>
> Fixed in r126720.

I had hoped r126720 would also fix the problem I've reported in PR 9352,
but unfortunately it did not.  But it seems to be an issue of the same
type, maybe this is just as easy to fix? :)