gcc/testsuite/gcc.dg/pr81979.c

   1 /* PR target/81979 */
   2 /* { dg-do link } */
   3 /* { dg-options "-O2 -w" } */
   4 /* { dg-additional-options "-fPIC" { target fpic } } */
   5 /* { dg-additional-options "-freorder-blocks-and-partition" { target freorder } } */
   6
   7 int d;
   8
   9 __attribute__((noinline, noclone)) void
  10 foo (int x)
  11 {
  12   int c;
  13   while (c < 1)
  14     {
  15       int o;
  16       for (o = 0; o < 4; ++o)
  17         c /= (x != 0) ? 2 : x;
  18     }
  19
  20   d = 1;
  21   for (;;)
  22     ;
  23 }
  24
  25 int
  26 main ()
  27 {
  28   asm volatile ("" : : "r" (&d) : "memory");
  29   foo (d);
  30   asm volatile ("" : : "r" (&d) : "memory");
  31   return 0;
  32 }