gcc/testsuite/gcc.dg/Wconversion-real.c

   1 /* Test for diagnostics for Wconversion for floating-point.  */
   2
   3 /* { dg-do compile } */
   4 /* { dg-options "-std=c99 -Wconversion" } */
   5
   6 float  vfloat;
   7 double vdouble;
   8 long double vlongdouble;
   9
  10 void ffloat (float f);
  11 void fdouble (double d);
  12 void flongdouble (long double ld);
  13
  14 void h (void)
  15 {
  16   float f = 0;
  17   double d = 0;
  18   long double ld = 0;
  19
  20   ffloat (3.1); /* { dg-warning "conversion" } */
  21   vfloat = 3.1; /* { dg-warning "conversion" } */
  22   ffloat (3.1L); /* { dg-warning "conversion" } */
  23   vfloat = 3.1L;  /* { dg-warning "conversion" } */
  24   fdouble (3.1L); /* { dg-warning "conversion" "" { target large_long_double } } */
  25   vdouble = 3.1L; /* { dg-warning "conversion" "" { target large_long_double } } */
  26   ffloat (vdouble); /* { dg-warning "conversion" } */
  27   vfloat = vdouble; /* { dg-warning "conversion" } */
  28   ffloat (vlongdouble); /* { dg-warning "conversion" } */
  29   vfloat = vlongdouble; /* { dg-warning "conversion" } */
  30   fdouble (vlongdouble); /* { dg-warning "conversion" "" { target large_long_double } } */
  31   vdouble = vlongdouble; /* { dg-warning "conversion" "" { target large_long_double } } */
  32
  33
  34   ffloat ((float) 3.1);
  35   vfloat = (float) 3.1;
  36   ffloat ((float) 3.1L);
  37   vfloat = (float) 3.1L;
  38   fdouble ((double) 3.1L);
  39   vdouble = (double) 3.1L;
  40   ffloat ((float) vdouble);
  41   vfloat = (float) vdouble;
  42   ffloat ((float) vlongdouble);
  43   vfloat = (float) vlongdouble;
  44   fdouble ((double) vlongdouble);
  45   vdouble = (double) vlongdouble;
  46
  47
  48   ffloat (3.0);
  49   vfloat = 3.0;
  50   ffloat (3.1f);
  51   vfloat = 3.1f;
  52   ffloat (0.25L);
  53   vfloat = 0.25L;
  54
  55
  56   fdouble (3.0);
  57   vdouble = 3.0;
  58   fdouble (3.1f);
  59   vdouble = 3.1f;
  60   fdouble (0.25L);
  61   vdouble = 0.25L;
  62
  63   flongdouble (3.0);
  64   vlongdouble = 3.0;
  65   flongdouble (3.1f);
  66   vlongdouble = 3.1f;
  67   flongdouble (0.25L);
  68   vlongdouble = 0.25L;
  69
  70   ffloat (f);
  71   vfloat = f;
  72   fdouble (f);
  73   vdouble = f;
  74   fdouble (d);
  75   vdouble = d;
  76   flongdouble (f);
  77   vlongdouble = f;
  78   flongdouble (d);
  79   vlongdouble = d;
  80   flongdouble (ld);
  81   vlongdouble = ld;
  82 }