re PR middle-end/61268 (ICE in vt_expand_var_loc_chain, at var-tracking.c:8262)

re PR middle-end/61268 (ICE in vt_expand_var_loc_chain, at var-tracking.c:8262)

gcc/
	PR middle-end/61268
	* function.c (assign_parm_setup_reg): Prevent invalid sharing of
	DECL_INCOMING_RTL and entry_parm.
	(get_arg_pointer_save_area): Likewise arg_pointer_save_area.
	* calls.c (load_register_parameters): Likewise argument values.
	(emit_library_call_value_1, store_one_arg): Likewise argument
	save areas.
	* config/i386/i386.c (assign_386_stack_local): Likewise the local
	stack slot.
	* explow.c (validize_mem): Modify the argument in-place.

From-SVN: r213002