tree-pta

[Mason]

On 27/11/2016 19:56, Florian Weimer wrote:

> Julien Teisseire wrote:
> 
>> Could you give me some help / doc / information / example on how
>> -ftree-pta works, what kind of source code it's optimizing ...
>> I am currently unable to detect in my code where the bug is !
> 
> Do you use casts a lot?  Do you access objects with a different type
> from that they were originally created with?

For the record, the description given in the manual for
-ftree-pta is...

    Perform function-local points-to analysis on trees.
    This flag is enabled by default at -O and higher.

(-O means -O1 in gcc)

Florian, you suspect an aliasing issue?
The OP might try -fno-strict-aliasing as used for the
Linux kernel.

Regards.