[Bug tree-optimization/50644] ICE in set_is_used added today

["markus at trippelsdorf dot de" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50644

--- Comment #16 from Markus Trippelsdorf <markus at trippelsdorf dot de> 2011-10-29 13:08:13 UTC ---
Or as one file:

 % cat test.i
struct _ddebug {
     const char *modname;
     const char *function;
     const char *filename;
     const char *format;
     char enabled;
}
cpumask_t;
int native_cpu_up(unsigned int cpu)
{
     int err;
     static struct _ddebug descriptor  = {
          "", __func__, "", "", 866, 0
     };
     if (__builtin_expect(!!(descriptor.enabled), 0))
     __dynamic_pr_debug(&descriptor, "", err);
     check_tsc_sync_source(cpu);
}
struct smp_ops {
     int (*cpu_up)(unsigned cpu);
     void (*cpu_die)(unsigned int cpu);
};
void native_cpu_die(unsigned int cpu);
struct kernel_symbol {
     unsigned long value;
};
struct smp_ops smp_ops = {
     .cpu_up = native_cpu_up,  .cpu_die = native_cpu_die,
};
static const struct kernel_symbol
__ksymtab_smp_ops __attribute__((__used__)) = {
     (unsigned long)&smp_ops
};
typedef struct {
}
atomic_t;
extern __typeof__(int) cpu_number;
static atomic_t start_count;
void check_tsc_sync_source(int cpu)
{
     if (unsynchronized_tsc())   return;
     else {
          do {
               static struct _ddebug descriptor = {
                    "", __func__, "", 151, 0
               };
               if (__builtin_expect(!!(descriptor.enabled), 0))
               __dynamic_pr_debug(&descriptor, "",          (( {
                    typeof(cpu_number) pfo_ret__;
                    switch (sizeof(cpu_number)) {
                    case 4:
                         asm("mov" "l ""%%""gs"":" "%P" "1"",%0" :
                         "=r" (pfo_ret__) : "m" (cpu_number));
                    }
                    pfo_ret__;
               }
               )), cpu);
          } while (0);
     }
     atomic_set(&start_count, 0);
}

 % gcc test.i -w -O2 -flto
In file included from :0:0:
test.i: In function ânative_cpu_upâ:
test.i:9:5: internal compiler error: Segmentation fault
Please submit a full bug report