gcc/testsuite/gcc.dg/format/bitfld-1.c

   1 /* Test for printf formats and bit-fields: bug 22421.  */
   2 /* Origin: Joseph Myers <joseph@codesourcery.com> */
   3 /* { dg-do compile } */
   4 /* { dg-options "-std=gnu99 -Wformat" } */
   5 /* { dg-require-effective-target int32plus } */
   6
   7 #include "format.h"
   8
   9 struct s {
  10   unsigned int u1 : 1;
  11   signed int s1 : 1;
  12   unsigned int u15 : 15;
  13   signed int s15 : 15;
  14   unsigned int u16 : 16;
  15   signed int s16 : 16;
  16   unsigned long u31 : 31;
  17   signed long s31 : 31;
  18   unsigned long u32 : 32;
  19   signed long s32 : 32;
  20   unsigned long long u48 : 48;
  21 } x;
  22
  23 void
  24 foo (void)
  25 {
  26   printf ("%d%u", x.u1, x.u1);
  27   printf ("%d%u", x.s1, x.s1);
  28   printf ("%d%u", x.u15, x.u15);
  29   printf ("%d%u", x.s15, x.s15);
  30   printf ("%d%u", x.u16, x.u16);
  31   printf ("%d%u", x.s16, x.s16);
  32 #if __INT_MAX__ > 32767
  33   /* If integers are 16 bits, there doesn't seem to be a way of
  34      printing these without getting an error.  */
  35   printf ("%d%u", x.u31, x.u31);
  36   printf ("%d%u", x.s31, x.s31);
  37 #endif
  38 #if __LONG_MAX__ > 2147483647 && __INT_MAX__ >= 2147483647
  39   /* If long is wider than 32 bits, the 32-bit bit-fields are int or
  40      unsigned int or promote to those types.  Otherwise, long is 32
  41      bits and the bit-fields are of type plain long or unsigned
  42      long.  */
  43   printf ("%d%u", x.u32, x.u32);
  44   printf ("%d%u", x.s32, x.s32);
  45 #else
  46   printf ("%ld%lu", x.u32, x.u32);
  47   printf ("%ld%lu", x.s32, x.s32);
  48 #endif
  49   printf ("%llu", x.u48); /* { dg-warning "15:has type '.*unsigned int:48'" } */
  50   printf ("%llu", (unsigned long long)x.u48);
  51 }