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Re: Patch to reduce stack sizes
On 05/24/2010 08:15 PM, Jeff Law wrote:
> On 05/24/10 12:05, Sebastian Pop wrote:
>> On Mon, May 24, 2010 at 11:18, Jeff Law<law@redhat.com> wrote:
>>
>>> Or is there another execution path that's causing the problem?
>>>
>> I think that at -O3 the function try_fit_stack_local gets inlined, and
>> that initializes poffset only at the very bottom, and other cases that
>> return false do not initialize it. I think that explains why at -O2 it
>> does not triggers the uninitialized variable warning.
>>
> Right. And thus what should be the behaviour of the two callers that
> don't check the return value of try_fit_stack_local when it return
> false? Or are we sure it can never return false from those calls?
The last two? It's designed so that try_fit_stack_local must always
succeed when we get there.
Bernd