re PR c++/61465 (Bogus parameter set but not used warning in constructor initialization list)

	PR c++/61465
	* call.c (convert_like_real) [ck_identity]: Call mark_rvalue_use
	after pulling out an element from a CONSTRUCTOR.

From-SVN: r215413

gcc/cp/ChangeLog

+2014-09-19  Jason Merrill  <jason@redhat.com>
+
+	PR c++/61465
+	* call.c (convert_like_real) [ck_identity]: Call mark_rvalue_use
+	after pulling out an element from a CONSTRUCTOR.
+
 2014-09-18  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/63248

gcc/cp/call.c

@@ -6206,7 +6206,6 @@ convert_like_real (conversion *convs, tree expr, tree fn, int argnum,
 	return expr;
       }
     case ck_identity:
-      expr = mark_rvalue_use (expr);
       if (BRACE_ENCLOSED_INITIALIZER_P (expr))
 	{
 	  int nelts = CONSTRUCTOR_NELTS (expr);
@@ -6217,6 +6216,7 @@ convert_like_real (conversion *convs, tree expr, tree fn, int argnum,
 	  else
 	    gcc_unreachable ();
 	}
+      expr = mark_rvalue_use (expr);
 
       if (type_unknown_p (expr))
 	expr = instantiate_type (totype, expr, complain);

gcc/testsuite/g++.dg/warn/Wunused-parm-6.C

+// PR c++/61465
+// { dg-do compile { target c++11 } }
+// { dg-options "-Wunused-but-set-parameter" }
+
+struct Foo {
+  Foo(void* x) : y{static_cast<char*>(x)} {}
+  char* y;
+};