gcc/testsuite/gcc.dg/tree-ssa/ssa-ccp-28.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O -fdump-tree-ccp1" } */
   3
   4 extern void abort (void);
   5
   6 static int g[1];
   7
   8 static int * const p = &g[0];
   9 static int * const q = &g[0];
  10
  11 int main(void)
  12 {
  13   g[0] = 1;
  14   *p = 0;
  15   *p = *q;
  16   if (g[0] != 0)
  17     abort ();
  18   return 0;
  19 }
  20
  21 /* We should have replaced all loads from p and q with the constant
  22    initial value.  */
  23
  24 /* { dg-final { scan-tree-dump-times "= p;" 0 "ccp1" } } */
  25 /* { dg-final { scan-tree-dump-times "= q;" 0 "ccp1" } } */