This is a regression present on the mainline only, a small oversight in the 
overhaul of the implementation of renaming.

Tested on x86_64-suse-linux, applied on the mainline.


2015-12-20  Eric Botcazou  <ebotcazou@adacore.com>

	* gcc-interface/utils2.c (gnat_rewrite_reference) <REALPART_EXPR>: New
	case identical to FLOAT_EXPR.
	<IMAGPART_EXPR>: Likewise.


2015-12-20  Eric Botcazou  <ebotcazou@adacore.com>

	* gnat.dg/complex1.adb: New test.
	* gnat.dg/complex1_pkg.ads: New helper.


-- 
Eric Botcazou