@@ -1364,6 +1364,17 @@ c_fully_fold_internal (tree expr, bool in_init, bool *maybe_const_operands,
? G_("left shift count >= width of type")
: G_("right shift count >= width of type")));
}
+ if ((code == TRUNC_DIV_EXPR
+ || code == CEIL_DIV_EXPR
+ || code == FLOOR_DIV_EXPR
+ || code == EXACT_DIV_EXPR
+ || code == TRUNC_MOD_EXPR)
+ && TREE_CODE (orig_op1) != INTEGER_CST
+ && TREE_CODE (op1) == INTEGER_CST
+ && (TREE_CODE (TREE_TYPE (orig_op0)) == INTEGER_TYPE
+ || TREE_CODE (TREE_TYPE (orig_op0)) == FIXED_POINT_TYPE)
+ && TREE_CODE (TREE_TYPE (orig_op1)) == INTEGER_TYPE)
+ warn_for_div_by_zero (loc, op1);
goto out;
case INDIRECT_REF:
@@ -12,7 +12,7 @@ int
f2 (void)
{
const int x = sizeof (char) - 1;
- return 1 / x; /* { dg-warning "division by zero" "" { target c++ } } */
+ return 1 / x; /* { dg-warning "division by zero" } */
}
int
@@ -25,5 +25,5 @@ int
f4 (void)
{
const int x = sizeof (int) / 3 - 1;
- return 1 / x; /* { dg-warning "division by zero" "" { target c++ } } */
+ return 1 / x; /* { dg-warning "division by zero" } */
}
@@ -0,0 +1,15 @@
+/* PR c/64440 */
+/* { dg-do compile } */
+/* { dg-options "-Wall -O2" } */
+
+int
+foo (int x)
+{
+ const int y = 0;
+ int r = 0;
+ r += x / y; /* { dg-warning "division by zero" } */
+ r += x / 0; /* { dg-warning "division by zero" } */
+ r += x % y; /* { dg-warning "division by zero" } */
+ r += x % 0; /* { dg-warning "division by zero" } */
+ return r;
+}