1 files changed, 43 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/c99-const-expr-7.c b/gcc/testsuite/gcc.dg/c99-const-expr-7.c
new file mode 100644
index 000000000..b872077e9
--- /dev/null
+++ b/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 } */