How to insert functions?

[Hugh Leather]

 Hi Andrew,
>     Yes, I did a bit.  it segfaults at
>         cgraphunit.c:cgraph_expand_all_functions:1323
>         node->lowered = DECL_STRUCT_FUNCTION (node->decl)->cfg != NULL;
>     It seems that the node->decl has been nulled by the time it gets 
> here.  It definitely isn't NULL after leaving my code. 
>     Can you think of anything that might do that?  I figured I must be 
> doing something pretty wrong and that there must be tons of examples 
> for this kind of thing but I haven't been able to find one.
>    
>
>     Cheers for the help,
>
>     Hugh.
>
> Andrew Haley wrote:
>> Hugh Leather wrote:
>>   
>>> Hi,
>>>
>>>   I am trying to add a new destructor function to object files I
>>> compile.  I'm doing this to instrument programs and then, once the
>>> program has finished I want to print out the statistics I've gathered.
>>>   So, just before pass 'remove_useless_stmts' is called on each function
>>> I try to create a static destructor which will print stats for the
>>> current function (and obviously, I don't do it on the functions just
>>> created).
>>>
>>>   Below I've put a simpler form, which should work for a one function
>>> program.  Calling createFnDecl() creates a new function called
>>> __my_new_function.  It should print "It worked!" when the program exits.
>>>   Now, with compiler flag -O0, this works just fine, but with -O1 or
>>> above it seg faults the compiler.
>>>
>>>   Can anyone tell me what I'm doing wrong?
>>>     
>>
>> Nothing obvious to me.  Did you debug the point at which the
>> segfault happened?
>>
>> Andrew.
>>
>>
>>