gcc/testsuite/gcc.dg/wtr-int-type-1.c

   1 /* Test for -Wtraditional warnings on integer constant types.
   2    Note, gcc should omit these warnings in system header files.
   3    By Kaveh R. Ghazi <ghazi@caip.rutgers.edu> 8/22/2000.  */
   4 /* { dg-do compile } */
   5 /* { dg-options "-std=c99 -Wtraditional" } */
   6
   7 void
   8 testfunc ()
   9 {
  10   long long i;
  11
  12   /* Octal and hex values shouldn't issue -Wtraditional warnings. */
  13   i = 0x80000000;
  14   i = 0xFFFFFFFF;
  15   i = 037777777777;
  16
  17   i = 0x8000000000000000;
  18   i = 0xFFFFFFFFFFFFFFFF;
  19   i = 01777777777777777777777;
  20
  21   /* Nor should values outside the range of (32-bit) unsigned long but
  22      inside the range of long long.  [since -traditional has no long long,
  23      we can pretend it worked the way it does in C99.]  */
  24   i = 9223372036854775807;
  25
  26   /* But this one should, since it doesn't fit in long (long), but
  27      does fit in unsigned long (long).  */
  28   i = 18446744073709551615; /* { dg-warning "integer constant is so large that it is unsigned" "so large" } */
  29   /* { dg-warning "this decimal constant would be unsigned in ISO C90" "ISO C90" { target *-*-* } 28 } */
  30
  31 # 29 "sys-header.h" 3
  32 }
  33
  34 void
  35 testfunc2( )
  36 {
  37   long long i;
  38
  39 /* We are in system headers now, no -Wtraditional warnings should issue.  */
  40
  41   i = 0x80000000;
  42   i = 0xFFFFFFFF;
  43   i = 037777777777;
  44
  45   i = 0x8000000000000000;
  46   i = 0xFFFFFFFFFFFFFFFF;
  47   i = 01777777777777777777777;
  48
  49   i = 9223372036854775807;
  50   i = 18446744073709551615;
  51 }
  52