c-common.c (c_common_get_alias_set): Correctly handle characters.

        * c-common.c (c_common_get_alias_set): Correctly handle characters.
        Rearrange order of expressions; don't handle vectors here.
        * alias.c (get_alias_set): Let vectors match their components.

From-SVN: r54821

1 files changed, 8 insertions, 0 deletions

diff --git a/gcc/alias.c b/gcc/alias.c
index d892926b453..2e6a2b084e1 100644
--- a/gcc/alias.c
+++ b/gcc/alias.c
@@ -575,6 +575,14 @@ get_alias_set (t)
      and references to functions, but that's different.)  */
   else if (TREE_CODE (t) == FUNCTION_TYPE)
     set = 0;
+
+  /* Unless the language specifies otherwise, let vector types alias
+     their components.  This avoids some nasty type punning issues in
+     normal usage.  And indeed lets vectors be treated more like an
+     array slice.  */
+  else if (TREE_CODE (t) == VECTOR_TYPE)
+    set = get_alias_set (TREE_TYPE (t));
+
   else
     /* Otherwise make a new alias set for this type.  */
     set = new_alias_set ();