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 implicit constant conversion" } */ 10 /* { dg-error "overflow in constant expression" "constant" { target *-*-* } 9 } */ 11 int b = (int) DBL_MAX; /* { dg-error "overflow" "" } */ 12 unsigned int c = -1.0; /* { dg-warning "overflow in implicit constant conversion" } */ 13 /* { dg-error "overflow in constant expression" "constant" { target *-*-* } 12 } */ 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 *-*-* } 16 } */ 18 int f = 0 << -1; /* { dg-warning "shift count" } */ 19 /* { dg-error "constant" "constant" { target *-*-* } 18 } */ 20 int g = 0 >> 1000; /* { dg-warning "shift count" } */ 21 /* { dg-error "constant" "constant" { target *-*-* } 20 } */ 22 int h = 0 >> -1; /* { dg-warning "shift count" } */ 23 /* { dg-error "constant" "constant" { target *-*-* } 22 } */ 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 implicit constant conversion" } */ 35 /* { dg-error "overflow in constant expression" "constant" { target *-*-* } 34 } */ 36