gcc/testsuite/gcc.dg/pr102478.c

   1 /* PR rtl-optimization/102478 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O2 -fno-if-conversion -Wno-div-by-zero" } */
   4
   5 unsigned a, b, c;
   6
   7 void
   8 foo (void)
   9 {
  10   c |= __builtin_expect (65535 / a, 0) && 0 / 0;
  11   b = 0;
  12 }
  13
  14 void
  15 bar (void)
  16 {
  17   if (a <= 65535)
  18     __builtin_trap ();
  19   b = 0;
  20 }
  21
  22 void
  23 baz (void)
  24 {
  25   if (a > 65535)
  26     b = 0;
  27   else
  28     __builtin_trap ();
  29 }