re PR middle-end/25505 (gcc uses way too much stack space for this code)

2006-08-31  Josh Conner  <jconner@apple.com>

	PR c++/25505
	* tree-gimple.c (is_gimple_mem_rhs): Recognize functions
	returning aggregates.

From-SVN: r116613

gcc/ChangeLog

+2006-08-31  Josh Conner  <jconner@apple.com>
+
+	PR c++/25505
+	* tree-gimple.c (is_gimple_mem_rhs): Recognize functions
+	returning aggregates.
+
 2006-08-31  Zdenek Dvorak <dvorakz@suse.cz>
 
 	PR tree-optimization/28839

gcc/tree-gimple.c

@@ -115,7 +115,9 @@ is_gimple_mem_rhs (tree t)
      to be stored in memory, since it's cheap and prevents erroneous
      tailcalls (PR 17526).  */
   if (is_gimple_reg_type (TREE_TYPE (t))
-      || TYPE_MODE (TREE_TYPE (t)) != BLKmode)
+      || (TYPE_MODE (TREE_TYPE (t)) != BLKmode
+	  && (TREE_CODE (t) != CALL_EXPR
+              || ! aggregate_value_p (t, t))))
     return is_gimple_val (t);
   else
     return is_gimple_formal_tmp_rhs (t);