gcc/testsuite/gcc.dg/pr104975.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O1 -fharden-compares -fno-inline -fno-ipa-pure-const" } */
   3
   4 __attribute__ ((pure, returns_twice)) int
   5 bar (int);
   6
   7 int
   8 quux (void)
   9 {
  10   return 0;
  11 }
  12
  13 int
  14 foo (short int x)
  15 {
  16   x = !x;
  17   bar (quux ());
  18
  19   return x;
  20 }