Defer allocating alias set for restricted pointer until here.
Call find_placeholder with second arg nonzero.
Minor cleanups.
+ * c-common.c (c_apply_type_quals_to_decl): Defer getting alias
+ set for restricted pointer types.
* emit-rtl.c (set_mem_attributes): Set more attributes.
(set_mem_align, change_address, adjust_address_1): New functions.
(change_address_1): Now static.
|| !C_TYPE_OBJECT_OR_INCOMPLETE_P (TREE_TYPE (TREE_TYPE (decl))))
error ("invalid use of `restrict'");
else if (flag_strict_aliasing)
- {
- /* No two restricted pointers can point at the same thing.
- However, a restricted pointer can point at the same thing
- as an unrestricted pointer, if that unrestricted pointer
- is based on the restricted pointer. So, we make the
- alias set for the restricted pointer a subset of the
- alias set for the type pointed to by the type of the
- decl. */
-
- HOST_WIDE_INT pointed_to_alias_set
- = get_alias_set (TREE_TYPE (TREE_TYPE (decl)));
-
- if (pointed_to_alias_set == 0)
- /* It's not legal to make a subset of alias set zero. */
- ;
- else
- {
- DECL_POINTER_ALIAS_SET (decl) = new_alias_set ();
- record_alias_subset (pointed_to_alias_set,
- DECL_POINTER_ALIAS_SET (decl));
- }
- }
+ /* Indicate we need to make a unique alias set for this pointer.
+ We can't do it here because it might be pointing to an
+ incomplete type. */
+ DECL_POINTER_ALIAS_SET (decl) = -2;
}
}