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=iso9899:1990 -pedantic-errors" } */
       6  
       7  #include <float.h>
       8  
       9  int a = DBL_MAX; /* { dg-warning "overflow in conversion" } */
      10  /* { dg-error "overflow in constant expression" "constant" { target *-*-* } .-1 } */
      11  int b = (int) DBL_MAX; /* { dg-error "overflow" } */
      12  unsigned int c = -1.0; /* { dg-warning "overflow in conversion" } */
      13  /* { dg-error "overflow in constant expression" "constant" { target *-*-* } .-1 } */
      14  unsigned int d = (unsigned)-1.0; /* { dg-error "overflow" } */
      15  
      16  int e = 0 << 1000; /* { dg-warning "shift count" } */
      17  /* { dg-error "constant" "constant" { target *-*-* } .-1 } */
      18  int f = 0 << -1; /* { dg-warning "shift count" } */
      19  /* { dg-error "constant" "constant" { target *-*-* } .-1 } */
      20  int g = 0 >> 1000; /* { dg-warning "shift count" } */
      21  /* { dg-error "constant" "constant" { target *-*-* } .-1 } */
      22  int h = 0 >> -1; /* { dg-warning "shift count" } */
      23  /* { dg-error "constant" "constant" { target *-*-* } .-1 } */
      24  
      25  int b1 = (0 ? (int) DBL_MAX : 0);
      26  unsigned int d1 = (0 ? (unsigned int)-1.0 : 0);
      27  int e1 = (0 ? 0 << 1000 : 0);
      28  int f1 = (0 ? 0 << -1 : 0);
      29  int g1 = (0 ? 0 >> 1000 : 0);
      30  int h1 = (0 ? 0 >> -1: 0);
      31  
      32  int i = -1 << 0;
      33  
      34  int j[1] = { DBL_MAX }; /* { dg-warning "overflow in conversion" } */
      35  /* { dg-error "overflow in constant expression" "constant" { target *-*-* } .-1 } */