diff options
Diffstat (limited to 'gcc-4.9/gcc/testsuite/gcc.dg/c99-const-expr-7.c')
| -rw-r--r-- | gcc-4.9/gcc/testsuite/gcc.dg/c99-const-expr-7.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/gcc.dg/c99-const-expr-7.c b/gcc-4.9/gcc/testsuite/gcc.dg/c99-const-expr-7.c new file mode 100644 index 000000000..b872077e9 --- /dev/null +++ b/gcc-4.9/gcc/testsuite/gcc.dg/c99-const-expr-7.c @@ -0,0 +1,43 @@ +/* Test for constant expressions: overflow and constant expressions; + see also overflow-warn-*.c for some other cases. */ +/* Origin: Joseph Myers <joseph@codesourcery.com> */ +/* { dg-do compile } */ +/* { dg-options "-std=iso9899:1999 -pedantic-errors" } */ + +#include <float.h> +#include <limits.h> + +int a = DBL_MAX; /* { dg-warning "overflow in implicit constant conversion" } */ +/* { dg-error "overflow in constant expression" "constant" { target *-*-* } 10 } */ +int b = (int) DBL_MAX; /* { dg-error "overflow" "" } */ +unsigned int c = -1.0; /* { dg-warning "overflow in implicit constant conversion" } */ +/* { dg-error "overflow in constant expression" "constant" { target *-*-* } 13 } */ +unsigned int d = (unsigned)-1.0; /* { dg-error "overflow" } */ + +int e = 0 << 1000; /* { dg-warning "shift count" } */ +/* { dg-error "constant" "constant" { target *-*-* } 17 } */ +int f = 0 << -1; /* { dg-warning "shift count" } */ +/* { dg-error "constant" "constant" { target *-*-* } 19 } */ +int g = 0 >> 1000; /* { dg-warning "shift count" } */ +/* { dg-error "constant" "constant" { target *-*-* } 21 } */ +int h = 0 >> -1; /* { dg-warning "shift count" } */ +/* { dg-error "constant" "constant" { target *-*-* } 23 } */ + +int b1 = (0 ? (int) DBL_MAX : 0); +unsigned int d1 = (0 ? (unsigned int)-1.0 : 0); +int e1 = (0 ? 0 << 1000 : 0); +int f1 = (0 ? 0 << -1 : 0); +int g1 = (0 ? 0 >> 1000 : 0); +int h1 = (0 ? 0 >> -1: 0); + +/* Allowed for now, but actually undefined behavior in C99. */ +int i = -1 << 0; + +int j[1] = { DBL_MAX }; /* { dg-warning "overflow in implicit constant conversion" } */ +/* { dg-error "overflow in constant expression" "constant" { target *-*-* } 36 } */ + +int array[2] = { [0 * (INT_MAX + 1)] = 0 }; /* { dg-warning "integer overflow in expression" } */ +/* { dg-error "overflow in constant expression" "constant" { target *-*-* } 39 } */ + +_Bool k = INT_MAX + 1; /* { dg-warning "integer overflow in expression" } */ +/* { dg-error "overflow in constant expression" "constant" { target *-*-* } 42 } */ |