alias.c (record_component_aliases): New function.

	* alias.c (record_component_aliases): New function.
	* tree.h: Clean up some declarations and comments.
	(record_component_aliases): New declaration.
	* tree.c (get_alias_set): If type and has alias set, use it.

From-SVN: r34078

1 files changed, 7 insertions, 2 deletions

diff --git a/gcc/tree.c b/gcc/tree.c
index f532afe..a62e130 100644
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -5621,10 +5621,15 @@ int
 get_alias_set (t)
      tree t;
 {
+  /* If we're not doing any lanaguage-specific alias analysis, just
+     assume everything aliases everything else.  */
   if (! flag_strict_aliasing || lang_get_alias_set == 0)
-    /* If we're not doing any lanaguage-specific alias analysis, just
-       assume everything aliases everything else.  */
     return 0;
+
+  /* If this is a type with a known alias set, return it since this must
+     be the correct thing to do.  */
+  else if (TYPE_P (t) && TYPE_ALIAS_SET_KNOWN_P (t))
+    return TYPE_ALIAS_SET (t);
   else
     return (*lang_get_alias_set) (t);
 }