gcc/testsuite/c-c++-common/Wconversion-pr40752a.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-Wconversion -Warith-conversion" } */
   3 #include <limits.h>
   4 void foo(char c, char c2)
   5 {
   6   c >>= c2;                     /* { dg-warning "conversion" } */
   7   c >>= 1;
   8   c <<= 1;                      /* { dg-warning "conversion" } */
   9   c <<= c2;                     /* { dg-warning "conversion" } */
  10   c += 1;                       /* { dg-warning "conversion" } */
  11   c += c2;                      /* { dg-warning "conversion" } */
  12   c -= 1;                       /* { dg-warning "conversion" } */
  13   c -= c2;                      /* { dg-warning "conversion" } */
  14   c *= 2;                       /* { dg-warning "conversion" } */
  15   c *= c2;                      /* { dg-warning "conversion" } */
  16   c /= 2;
  17   /* If char is unsigned we avoid promoting to int.  */
  18   c /= c2;  /* { dg-warning "conversion" "" { target { ! unsigned_char } } } */
  19   c %= 2;
  20   c %= c2;  /* { dg-warning "conversion" "" { target { ! unsigned_char } } } */
  21   c = -c2;                      /* { dg-warning "conversion" } */
  22   c = ~c2;                      /* { dg-warning "conversion" } */
  23   c = c2++;
  24   c = ++c2;
  25   c = c2--;
  26   c = --c2;
  27 }
  28
  29 void bar(char c, int c2)
  30 {
  31   c >>= c2;                     /* { dg-warning "conversion" } */
  32   c >>= (int)1;
  33   c <<= (int)1;                 /* { dg-warning "conversion" } */
  34   c <<= c2;                     /* { dg-warning "conversion" } */
  35   c += ((int)CHAR_MAX + CHAR_MAX); /* { dg-warning "conversion" } */
  36   c += c2; /* { dg-warning "conversion" } */
  37   c -= ((int)CHAR_MAX + CHAR_MAX); /* { dg-warning "conversion" } */
  38   c -= c2; /* { dg-warning "conversion" } */
  39   c *= ((int)CHAR_MAX + CHAR_MAX); /* { dg-warning "conversion" } */
  40   c *= c2; /* { dg-warning "conversion" } */
  41   c /= ((int)CHAR_MAX + CHAR_MAX); /* { dg-warning "conversion" } */
  42   c /= c2; /* { dg-warning "conversion" } */
  43   c %= ((int)CHAR_MAX + CHAR_MAX); /* { dg-warning "conversion" } */
  44   c %= c2; /* { dg-warning "conversion" } */
  45   c = ~c2; /* { dg-warning "conversion" } */
  46   c = c2++; /* { dg-warning "conversion" } */
  47   c = ++c2; /* { dg-warning "conversion" } */
  48   c = c2--; /* { dg-warning "conversion" } */
  49   c = --c2; /* { dg-warning "conversion" } */
  50 }