[Bug rtl-optimization/55161] New: internal compiler error: in schedule_reg_moves, at modulo-sched.c:731

["amylaar at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55161

             Bug #: 55161
           Summary: internal compiler error: in schedule_reg_moves, at
                    modulo-sched.c:731
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: rtl-optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: amylaar@gcc.gnu.org
                CC: crowl@gcc.gnu.org, olegendo@gcc.gnu.org
            Target: arm-*-*


int test_04 (int* x, int c)
{
  int s = 0;
  for (int i = 0; i < c; ++i)
    s += *--x;
  return s;
}

compiled with:

./cc1 -O2 t.c --std=c99 -mthumb -march=armv7 -fmodulo-sched

worked in r192505.

In r193060, we get:

t.c:7:1: internal compiler error: in schedule_reg_moves, at modulo-sched.c:731