===================================================================
@@ -3177,13 +3177,19 @@ get_constraint_for_component_ref (tree t
cexpr.var = curr->id;
VEC_safe_push (ce_s, heap, *results, &cexpr);
}
- else
+ else if (VEC_length (ce_s, *results) == 0)
/* Assert that we found *some* field there. The user couldn't be
accessing *only* padding. */
/* Still the user could access one past the end of an array
embedded in a struct resulting in accessing *only* padding. */
- gcc_assert (VEC_length (ce_s, *results) >= 1
- || ref_contains_array_ref (orig_t));
+ /* Or accessing only padding via type-punning to a type
+ that has a filed just in padding space. */
+ {
+ cexpr.type = SCALAR;
+ cexpr.var = anything_id;
+ cexpr.offset = 0;
+ VEC_safe_push (ce_s, heap, *results, &cexpr);
+ }
}
else if (bitmaxsize == 0)
{
===================================================================
@@ -0,0 +1,27 @@
+struct A
+{
+ int i;
+ long l;
+};
+
+struct B
+{
+ int i;
+};
+
+struct C
+{
+ int i;
+ struct B b;
+};
+
+struct B foo (struct A a)
+{
+ struct C *c = (struct C *) &a;
+ return c->b;
+}
+void bar (struct A a, struct B b)
+{
+ struct C *c = (struct C *) &a;
+ c->b = b;
+}