Fix PR39977, bootstrap on HPPA

[Michael Matz]

Hi,

Steve mentioned that this fixes the bootstrap problem on HPPA, and I've 
regstrapped this on x86_64-linux without regressions.

Okay for trunk?


Ciao,
Michael.
-- 
	* calls.c (initialize_argument_information): Handle SSA names like
	decls with a non MEM_P DECL_RTL.
	
Index: calls.c
===================================================================
--- calls.c	(Revision 146955)
+++ calls.c	(Arbeitskopie)
@@ -1054,6 +1054,7 @@ initialize_argument_information (int num
 	      || (callee_copies
 		  && !TREE_ADDRESSABLE (type)
 		  && (base = get_base_address (args[i].tree_value))
+		  && TREE_CODE (base) != SSA_NAME
 		  && (!DECL_P (base) || MEM_P (DECL_RTL (base)))))
 	    {
 	      /* We can't use sibcalls if a callee-copied argument is