[Bug tree-optimization/117507] SIGSEGV in tree_strip_nop_conversions

[dcb314 at hotmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117507

--- Comment #3 from David Binderman <dcb314 at hotmail dot com> ---
After most of the reduction:

typedef int u_int;
static void z900_vstoreb();
int z900_edit_x_edit_and_mark_regs;
unsigned long z900_edit_x_edit_and_mark_regs_1_0_0;
u_int z900_edit_x_edit_and_mark_regs_0_0;
void(__attribute__(()) z900_edit_x_edit_and_mark)() {
  int l;
  int b1;
  unsigned long addr1;
  int sig = 0;
  int trial_run;
  int i;
  int d;
  int h;
  unsigned char sbyte;
  unsigned char fbyte;
  unsigned char rbyte;
  for (; trial_run >= 0; trial_run--)
    for (i = 0, d = 0; 0 < l + 1; i++) {
      if (d == 0)
        h = sbyte >> 4;
      d = 1;
      if (z900_edit_x_edit_and_mark_regs_0_0)
        z900_edit_x_edit_and_mark_regs_1_0_0 = addr1;
      rbyte = (sig == 0 && h == 0) ? fbyte : (0xF0 | h);
      z900_vstoreb(rbyte, addr1, b1, z900_edit_x_edit_and_mark_regs);
      sig = 1;
    }
}