gcc/testsuite/gcc.dg/pr55831.c

   1 /* PR tree-optimization/55831 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O -fstrict-overflow -ftree-vectorize -Wno-unused-label" } */
   4
   5 int g;
   6 short p, q;
   7
   8 void
   9 foo (void)
  10 {
  11   short a = p, b = q, i;
  12
  13   if (a)
  14     {
  15     label:
  16       for (i = 0; i < 8; i++)
  17         b ^= a++;
  18
  19       if (!b)
  20         g = 0;
  21     }
  22 }
  23
  24 void
  25 bar (void)
  26 {
  27   short a = p, b = q, i;
  28
  29   if (a)
  30     {
  31     label:
  32       for (i = 0; i < 8; i++)
  33         b ^= (a = a + 1);
  34
  35       if (!b)
  36         g = 0;
  37     }
  38 }
  39