__label__ , internal compiler error:segmentation fault

__label__ , internal compiler error:segmentation fault

[sumanth]

Hi,
    I am encountering a segmentation fault : internal compiler error  
after running this torture case.
  

 #ifdef STACK_SIZE
#define DEPTH ((STACK_SIZE) / 512 + 1)
#else
#define DEPTH 1000
#endif

#if ! defined (NO_LABEL_VALUES) && !defined (NO_TRAMPOLINES)
x(a)
{
  __label__ xlab;
  void y(a)
    {
      if (a==0)
        goto xlab;
      y (a-1);
    }
  y (a);
 xlab:;
  return a;
}
#endif

main ()
{
#if ! defined (NO_LABEL_VALUES) && !defined (NO_TRAMPOLINES)
  if (x (DEPTH) != DEPTH)
    abort ();
#endif
  exit (0);
}

After seeing similar test cases as well, my compiler crashes because of 
__label__ xlab.
Can any one point me to solution for locally declared labels in the 
sense , any macros I should define in particular
to handle __label__.

Thanks in advance,
Sumanth
 
                               

Re: __label__ , internal compiler error:segmentation fault

[Ian Lance Taylor]

sumanth <sumanth.gundapneni@redpinesignals.com> writes:

> After seeing similar test cases as well, my compiler crashes because
> of __label__ xlab.

Where does the compiler crash?  That will normally tell you what is
needed.

> Can any one point me to solution for locally declared labels in the
> sense , any macros I should define in particular
> to handle __label__.

The test case you showed has to do with jumping out of a nested function
to a label in an enclosing function.  This is not something that real
code does, so it's not worth worrying about unless you really want
completeness.  Look at the docs for the nonlocal_goto and
nonlocal_goto_receiver insns.  Also TRAMPOLINE_TEMPLATE and friends.

Ian