[patch tree-ssa-structalias.c]: Small finding in find_func_aliases function

[Kai Tietz]

Hello,

while debugging I made the finding that in find_func_aliases rhsop
might be used as NULL for gimple_assign_single_p items.  It should be
using for the gimple_assign_single_p instead directly the rhs1-item as
argument to pass to get_constraint_for_rhs function.

ChangeLog

2013-04-05  Kai Tietz

        * tree-ssa-structalias.c (find_func_aliases): Special-case
        gimple_assign_single_p handling.

Ok for apply?

Regards,
Kai


Index: tree-ssa-structalias.c
===================================================================
--- tree-ssa-structalias.c      (Revision 197495)
+++ tree-ssa-structalias.c      (Arbeitskopie)
@@ -4667,9 +4667,10 @@ find_func_aliases (gimple origt)
            }
          else if ((CONVERT_EXPR_CODE_P (code)
                    && !(POINTER_TYPE_P (gimple_expr_type (t))
-                        && !POINTER_TYPE_P (TREE_TYPE (rhsop))))
-                  || gimple_assign_single_p (t))
+                        && !POINTER_TYPE_P (TREE_TYPE (rhsop)))))
            get_constraint_for_rhs (rhsop, &rhsc);
+         else if (gimple_assign_single_p (t))
+           get_constraint_for_rhs (gimple_assign_rhs1 (t), &rhsc);
          else if (code == COND_EXPR)
            {
              /* The result is a merge of both COND_EXPR arms.  */