gcc/testsuite/c-c++-common/Wsizeof-array-div1.c

   1 /* PR c++/91741 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-Wall" } */
   4
   5 typedef int T;
   6
   7 int
   8 fn (int ap[])
   9 {
  10   int arr[10];
  11   int *arr2[10];
  12   int *p = &arr[0];
  13   int r = 0;
  14
  15   r += sizeof (arr) / sizeof (*arr);
  16   r += sizeof (arr) / sizeof (p); /* { dg-warning "expression does not compute" "" { target { ! ilp32 } } } */
  17   r += sizeof (arr) / sizeof p; /* { dg-warning "expression does not compute" "" { target { ! ilp32 } } } */
  18   r += sizeof (arr) / (sizeof p);
  19   r += sizeof (arr) / (sizeof (p));
  20   r += sizeof (arr2) / sizeof p;
  21   r += sizeof (arr2) / sizeof (int); /* { dg-warning "expression does not compute" "" { target { ! ilp32 } } } */
  22   r += sizeof (arr2) / sizeof (int *);
  23   r += sizeof (arr2) / sizeof (short *);
  24   r += sizeof (arr) / sizeof (int);
  25   r += sizeof (arr) / sizeof (unsigned int);
  26   r += sizeof (arr) / sizeof (T);
  27   r += sizeof (arr) / sizeof (short); /* { dg-warning "expression does not compute" } */
  28   r += sizeof (arr) / (sizeof (short));
  29
  30   r += sizeof (ap) / sizeof (char); /* { dg-warning ".sizeof. on array function parameter" } */
  31
  32   const char arr3[] = "foo";
  33   r += sizeof (arr3) / sizeof(char);
  34   r += sizeof (arr3) / sizeof(int);
  35   r += sizeof (arr3) / sizeof (*arr3);
  36
  37   int arr4[5][5];
  38   r += sizeof (arr4) / sizeof (arr4[0]);
  39   r += sizeof (arr4) / sizeof (*arr4);
  40   r += sizeof (arr4) / sizeof (**arr4);
  41   r += sizeof (arr4) / sizeof (int *);
  42   r += sizeof (arr4) / sizeof (int);
  43   r += sizeof (arr4) / sizeof (short int);
  44
  45   T arr5[10];
  46   r += sizeof (arr5) / sizeof (T);
  47   r += sizeof (arr5) / sizeof (int);
  48   r += sizeof (arr5) / sizeof (short); /* { dg-warning "expression does not compute" } */
  49
  50   double arr6[10];
  51   r += sizeof (arr6) / sizeof (double);
  52   r += sizeof (arr6) / sizeof (float); /* { dg-warning "expression does not compute" } */
  53   r += sizeof (arr6) / sizeof (*arr6);
  54
  55   return r;
  56 }