Re: loops problem

[Abdul Wahid Memon <engrwahidmemon at gmail dot com>]

Thanks alot. Its working well at GIMPLE but for RTL, it is again
posing a problem of internal compiler error.

Regards

Abdul

On Thu, May 19, 2011 at 2:28 AM, Ian Lance Taylor <iant@google.com> wrote:
> Abdul Wahid Memon <engrwahidmemon@gmail.com> writes:
>
>> I am facing some problem at obtaining the number of loops in the source program.
>> I am trying to use a function number_of_loops defined in cfgloop.h
>> with the help of plugin.
>>
>> I have tried to capture this at both GIMPLE level after copy headers
>> pass where I always get the value of 0,
>> because the condition ?if (!current_loops) ? ?return 0; is (I think)
>> always becoming true and the same thing happens
>> at RTL after 'loop2_init' pass but I get the value of 1 even in the
>> presence or in the absence of any loop.
>>
>> This is the first time I am playing with GCC plugins. Please help me
>> out with this issue.
>>
>> PS: The passes after which I am puting my passes are definitely
>> producing the information about the loops as
>> can be seen from the dumps produced by copy headers pass and loop
>> initialization.
>
> If you want to call number_of_loops you need to call loop_optimizer_init
> at the start of your pass and loop_optimizer_finalize at the end of it.
>
> Ian
>