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

   1 /* Test for diagnostics for Wconversion between floating-point and
   2    integers.  */
   3
   4 /* { dg-do compile }
   5 /* { dg-skip-if "doubles are floats,ints are 16bits" { "avr-*-*" } { "*" } { "" } } */
   6 /* { dg-options "-std=c99 -Wconversion" } */
   7 /* { dg-require-effective-target int32plus } */
   8 /* { dg-require-effective-target double64plus } */
   9 #include <limits.h>
  10
  11 void fsi (signed int x);
  12 void fui (unsigned int x);
  13 void ffloat (float x);
  14 void fdouble (double x);
  15
  16 float  vfloat;
  17 double vdouble;
  18
  19 void h (void)
  20 {
  21   unsigned int ui = 3;
  22   int   si = 3;
  23   unsigned char uc = 3;
  24   signed char sc = 3;
  25   float  f = 3;
  26   double d = 3;
  27
  28   fsi (3.1f); /* { dg-warning "conversion" } */
  29   si = 3.1f; /* { dg-warning "conversion" } */
  30   fsi (3.1);  /* { dg-warning "conversion" } */
  31   si = 3.1;  /* { dg-warning "conversion" } */
  32   fsi (d);    /* { dg-warning "conversion" } */
  33   si = d;    /* { dg-warning "conversion" } */
  34   fui (-1.0); /* { dg-warning "overflow" } */
  35   ui = -1.0;   /* { dg-warning "overflow" } */
  36   ffloat (INT_MAX);  /* { dg-warning "conversion" } */
  37   vfloat = INT_MAX;  /* { dg-warning "conversion" } */
  38   ffloat (16777217); /* { dg-warning "conversion" } */
  39   vfloat = 16777217; /* { dg-warning "conversion" } */
  40   ffloat (si); /* { dg-warning "conversion" } */
  41   vfloat = si; /* { dg-warning "conversion" } */
  42   ffloat (ui); /* { dg-warning "conversion" } */
  43   vfloat = ui; /* { dg-warning "conversion" } */
  44
  45   fsi (3);
  46   si = 3;
  47   fsi (3.0f);
  48   si = 3.0f;
  49   fsi (3.0);
  50   si = 3.0;
  51   fsi (16777217.0f);
  52   si = 16777217.0f;
  53   fsi ((int) 3.1);
  54   si = (int) 3.1;
  55   ffloat (3U);
  56   vfloat = 3U;
  57   ffloat (3);
  58   vfloat = 3;
  59   ffloat (INT_MIN);
  60   vfloat = INT_MIN;
  61   ffloat (uc);
  62   vfloat = uc;
  63   ffloat (sc);
  64   vfloat = sc;
  65
  66   fdouble (UINT_MAX);
  67   vdouble = UINT_MAX;
  68   fdouble (ui);
  69   vdouble = ui;
  70   fdouble (si);
  71   vdouble = si;
  72 }
  73
  74
  75 void fss (signed short x);
  76 void fus (unsigned short x);
  77 void fsc (signed char x);
  78 void fuc (unsigned char x);
  79
  80 void h2 (void)
  81 {
  82   unsigned short int us;
  83   short int   ss;
  84   unsigned char uc;
  85   signed char sc;
  86
  87   fss (4294967294.0); /* { dg-warning "conversion" } */
  88   ss = 4294967294.0; /* { dg-warning "conversion" } */
  89   fss (-4294967294.0);  /* { dg-warning "conversion" } */
  90   ss = -4294967294.0;  /* { dg-warning "conversion" } */
  91   fus (4294967294.0); /* { dg-warning "conversion" } */
  92   us = 4294967294.0; /* { dg-warning "conversion" } */
  93   fus (-4294967294.0);  /* { dg-warning "conversion" } */
  94   us = -4294967294.0;  /* { dg-warning "conversion" } */
  95
  96   fsc (500.0); /* { dg-warning "conversion" } */
  97   sc = 500.0; /* { dg-warning "conversion" } */
  98   fsc (-500.0);  /* { dg-warning "conversion" } */
  99   sc = -500.0;  /* { dg-warning "conversion" } */
 100   fuc (500.0); /* { dg-warning "conversion" } */
 101   uc = 500.0; /* { dg-warning "conversion" } */
 102   fuc (-500.0);  /* { dg-warning "conversion" } */
 103   uc = -500.0;  /* { dg-warning "conversion" } */
 104
 105   fss (500.0);
 106   ss = 500.0;
 107   fss (-500.0);
 108   ss = -500.0;
 109   fus (500.0);
 110   us = 500.0;
 111   fus (-500.0);   /* { dg-warning "conversion" } */
 112   us = -500.0;    /* { dg-warning "conversion" } */
 113 }