[Bug middle-end/43466] New: ICE using pragma GCC optimize("O2")

[rmansfield at qnx dot com]

~/gcc/trunk/gcc/tmp/gcc$ ./xgcc -v
Using built-in specs.
Target: i686-pc-linux-gnu
Configured with: ../configure --disable-bootstrap --enable-languages=c
Thread model: posix
gcc version 4.5.0 20100321 (experimental) [trunk revision 157602] (GCC) 
~/gcc/trunk/gcc/tmp/gcc$ cat ~/ice.i
#pragma GCC optimize ("O2")

struct intrinfo_entry {
  unsigned vector_base;
  unsigned cascade_vector;
  unsigned cpu_intr_base;
};

extern unsigned intrinfo_num;
extern struct intrinfo_entry *intrinfoptr;

struct level_label {
 int secondary;
};

static void calculate_combines(struct level_label *labels) {
  unsigned i;
  int level;
  for(i = 0; i < intrinfo_num; ++i) {
    struct intrinfo_entry *iip = &intrinfoptr[i];
    if(!labels[level].secondary) {
      unsigned j;
      for(j = intrinfo_num - 1; j > i; --j) {
        struct intrinfo_entry *iip2 = &intrinfoptr[j];
        if(iip2->cascade_vector == iip->cascade_vector) 
         get_interrupt_level(0, iip2->vector_base);
      }
    }
  }
}

void cpu_interrupt_init(unsigned num_levels) {
  struct level_label *labels;
  calculate_combines(labels);
}
~/gcc/trunk/gcc/tmp/gcc$ ./xgcc -B. ~/ice.i
/home/ryan/ice.i: In function ‘calculate_combines’:
/home/ryan/ice.i:30:1: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.


-- 
           Summary: ICE using pragma GCC optimize("O2")
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: rmansfield at qnx dot com
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43466