How to extract types of variables and its uid?

[Swati Rathi]

Is there a plan of merging type uid's?

Also, is there is a global store maintaining all the types used in a 
program?
Or is there any other unique feature to distinguish between two tree 
types, other than type uid?


On Thursday 09 April 2015 09:47 PM, Richard Biener wrote:
> On April 9, 2015 5:11:00 PM GMT+02:00, Swati Rathi<swatirathi@cse.iitb.ac.in>  wrote:
>> I have enabled the LTO infrastructure using -flto -flto-partition=none.
>>
>> In the LTO infrastructure, when I try to print the TYPE_UID for the
>> types of variable var1 and var2, its different (as mentioned in my
>> first
>> post).
>>
>> IStream *var1;
>> IStream *var2;
> Even there merging isn't guaranteed.
>
> Richard.
>
>> On Thursday 09 April 2015 08:21 PM, Andrew Pinski wrote:
>>> On Thu, Apr 9, 2015 at 10:40 PM, Swati Rathi
>> <swatirathi@cse.iitb.ac.in>  wrote:
>>>> Even I am getting same uid's on small programs.
>>>> I tried declaring variables across files also.
>>>> But I am unable to replicate the problem on small programs.
>>>>
>>>> I am testing on SPEC CPU2006 benchmark suite, program - 453.povray
>>>> Below is the information which is getting dumped using
>>>> -fdump-tree-gimple-uid
>>>>
>>>> IStream has different uid's -> 5363, 5364, 11467 and 11521. In a
>> file the
>>>> uid is same.
>>>> Can you suggest other experiments to identify the reason?
>>> Yes UID are only the same compiling unit.  If you want to do some
>>> analysis with types across units you should be using LTO
>>> infrastructure.
>>>
>>> Thanks,
>>> Andrew