1  /* Test for constant expressions: overflow and constant expressions;
       2     see also overflow-warn-*.c for some other cases.  */
       3  /* Origin: Joseph Myers <joseph@codesourcery.com> */
       4  /* { dg-do compile } */
       5  /* { dg-options "-std=iso9899:1999 -pedantic-errors" } */
       6  
       7  #include <float.h>
       8  #include <limits.h>
       9  
      10  int a = DBL_MAX; /* { dg-warning "overflow in conversion" } */
      11  /* { dg-error "overflow in constant expression" "constant" { target *-*-* } .-1 } */
      12  int b = (int) DBL_MAX; /* { dg-error "overflow" } */
      13  unsigned int c = -1.0; /* { dg-warning "overflow in conversion" } */
      14  /* { dg-error "overflow in constant expression" "constant" { target *-*-* } .-1 } */
      15  unsigned int d = (unsigned)-1.0; /* { dg-error "overflow" } */
      16  
      17  int e = 0 << 1000; /* { dg-warning "shift count" } */
      18  /* { dg-error "constant" "constant" { target *-*-* } .-1 } */
      19  int f = 0 << -1; /* { dg-warning "shift count" } */
      20  /* { dg-error "constant" "constant" { target *-*-* } .-1 } */
      21  int g = 0 >> 1000; /* { dg-warning "shift count" } */
      22  /* { dg-error "constant" "constant" { target *-*-* } .-1 } */
      23  int h = 0 >> -1; /* { dg-warning "shift count" } */
      24  /* { dg-error "constant" "constant" { target *-*-* } .-1 } */
      25  
      26  int b1 = (0 ? (int) DBL_MAX : 0);
      27  unsigned int d1 = (0 ? (unsigned int)-1.0 : 0);
      28  int e1 = (0 ? 0 << 1000 : 0);
      29  int f1 = (0 ? 0 << -1 : 0);
      30  int g1 = (0 ? 0 >> 1000 : 0);
      31  int h1 = (0 ? 0 >> -1: 0);
      32  
      33  int i = -1 << 0;
      34  /* { dg-error "constant" "constant" { target *-*-* } .-1 } */
      35  
      36  int j[1] = { DBL_MAX }; /* { dg-warning "overflow in conversion" } */
      37  /* { dg-error "overflow in constant expression" "constant" { target *-*-* } .-1 } */
      38  
      39  int array[2] = { [0 * (INT_MAX + 1)] = 0 }; /* { dg-warning "integer overflow in expression" } */
      40  /* { dg-error "overflow in constant expression" "constant" { target *-*-* } .-1 } */
      41  
      42  _Bool k = INT_MAX + 1; /* { dg-warning "integer overflow in expression" } */
      43  /* { dg-error "overflow in constant expression" "constant" { target *-*-* } .-1 } */