[PATCH] Fix PR61969

[Richard Biener]

This fixes an invalid NRV optimization done for returning a
non-automatic var.

Bootstrapped and tested on x86_64-unknown-linux-gnu, applied.

Richard.

2014-10-08 Richard Biener <***@suse.de>

PR tree-optimization/61969
* tree-nrv.c (pass_nrv::execute): Properly test for automatic
variables.

Index: gcc/tree-nrv.c
===================================================================
--- gcc/tree-nrv.c (revision 215917)
+++ gcc/tree-nrv.c (working copy)
@@ -216,8 +216,7 @@ pass_nrv::execute (function *fun)
same type and alignment as the function's result. */
if (TREE_CODE (found) != VAR_DECL
|| TREE_THIS_VOLATILE (found)
- || DECL_CONTEXT (found) != current_function_decl
- || TREE_STATIC (found)
+ || !auto_var_in_fn_p (found, current_function_decl)
|| TREE_ADDRESSABLE (found)
|| DECL_ALIGN (found) > DECL_ALIGN (result)
|| !useless_type_conversion_p (result_type,