gcc/testsuite/gcc.dg/pr20115.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O2" } */
   3
   4 int func_pure (void);
   5 void func_other (int);
   6 int global_int;
   7 int func_pure (void) { return global_int; }
   8 void func_other (int a)
   9 {
  10   global_int = a + 1;
  11 }
  12 int f(void)
  13 {
  14   int a;
  15   a = func_pure();
  16   func_other (a);
  17   a = func_pure (); // We were removing this function call
  18   return a;
  19 }
  20 void abort (void);
  21
  22 int main(void)
  23 {
  24   global_int = 10;
  25   if (f() != 11)
  26     abort ();
  27   return 0;
  28 }