[Bug middle-end/34386] -Wstrict-aliasing=3 ineffective (tree-ssa-alias-warnings.c)

[mueller at gcc dot gnu dot org]

------- Comment #3 from mueller at gcc dot gnu dot org  2007-12-08 02:07 -------
this patch seems to be an alternative way of making -Wstrict-aliasing=3 work
again for the testcase: 

--- c-common.c  (revision 130658)
+++ c-common.c  (working copy)
@@ -1035,7 +1035,8 @@ strict_aliasing_warning (tree otype, tre
         && POINTER_TYPE_P (otype) && !VOID_TYPE_P (TREE_TYPE (type))))
     return false;

-  if ((warn_strict_aliasing > 1) && TREE_CODE (expr) == ADDR_EXPR
+  if ((warn_strict_aliasing > 1)
+      && (TREE_CODE (expr) == CONVERT_EXPR || TREE_CODE (expr) == ADDR_EXPR)
       && (DECL_P (TREE_OPERAND (expr, 0))
           || handled_component_p (TREE_OPERAND (expr, 0))))
     {


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34386