gcc/testsuite/gcc.dg/pr101223.c

   1 /* PR tree-optimization/101223 */
   2 /* { dg-do run } */
   3 /* { dg-options "-O2 " } */
   4
   5 struct {
   6   int a : 1;
   7 } b;
   8 int c = 1, d;
   9 int foo1() {
  10   for (; d < 2; d++) {
  11     int e = ~c, f = 0, g;
  12     if (e) {
  13       f = c;
  14       g = b.a;
  15       b.a = f;
  16       if (b.a >= g)
  17         __builtin_abort();
  18     }
  19     c = f;
  20     b.a = g;
  21   }
  22   return 0;
  23 }
  24
  25 int foo2() {
  26   for (; d < 2; d++) {
  27     int e = ~c, f = 0, g;
  28     if (e) {
  29       f = c;
  30       g = b.a;
  31       b.a = f;
  32       if (g <= b.a)
  33         __builtin_abort();
  34     }
  35     c = f;
  36     b.a = g;
  37   }
  38   return 0;
  39 }
  40 int main ()
  41 {
  42   return foo1() + foo2();
  43 }
  44