tree.c (build_type_no_quals): New function.

2000-11-13  Andrew Haley  <aph@redhat.com>

        * tree.c (build_type_no_quals): New function.
        * tree.h (build_type_no_quals): Declare.
        * c-common.c (c_get_alias_set): When considering type
        compatibility for pointer types, ignore cv-qualifiers anywhere in
        a pointer chain.

From-SVN: r37479

1 files changed, 20 insertions, 0 deletions

diff --git a/gcc/tree.c b/gcc/tree.c
index 4b3e930..7e820f5 100644
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -3798,6 +3798,26 @@ build_reference_type (to_type)
   return t;
 }
 
+/* Build a type that is compatible with t but has no cv quals anywhere
+   in its type, thus
+
+   const char *const *const *  ->  char ***.  */
+
+tree
+build_type_no_quals (t)
+  tree t;
+{
+  switch (TREE_CODE (t))
+    {
+    case POINTER_TYPE:
+      return build_pointer_type (build_type_no_quals (TREE_TYPE (t)));
+    case REFERENCE_TYPE:
+      return build_reference_type (build_type_no_quals (TREE_TYPE (t)));
+    default:
+      return TYPE_MAIN_VARIANT (t);
+    }
+}
+
 /* Create a type of integers to be the TYPE_DOMAIN of an ARRAY_TYPE.
    MAXVAL should be the maximum value in the domain
    (one less than the length of the array).