gcc/testsuite/gcc.dg/c90-const-expr-7.c

   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 } */