* c-decl.c (struct language_function): Renamed from struct c_function.
	Delete elt NEXT.
	(c_function_chain): Delete.
	(push_c_function_context): New arg F.  Don't warn about nested
	functions here.  Fill LANGUAGE elt of F.  Delete code to update
	c_function_chain.  Don't call push_function_context.
	(pop_c_function_context): New arg F.  Restore from there instead of
	from c_function_chain.  Don't call pop_function_context.  Clear out
	LANGUAGE field of F when done.
	* c-lang.c: Include "function.h"
	(lang_init): Initialize save_lang_status and restore_lang_status.
	* c-parse.in (nested_function, nested_function_notype): Warn about
	nested functions.  Call push_function_context/pop_function_context
	instead of the _c_ variants.
	* c-tree.h (push_c_function_context, pop_c_function_context): Update
	prototype.
	* Makefile.in (c-lang.o): Update dependencies.

	* emit-rtl.c (init_emit): Use xmalloc to allocate regno_reg_rtx,
	regno_pointer_flag, regno_pointer_align.
	(gen_reg_rtx): Use xrealloc to enlarge them.
	(free_emit_status): New function.
	* function.c (mark_machine_status, mark_lang_status): New variables.
	(assign_stack_local_1): Renamed from assign_outer_stack_local.  Merge
	in some bits from assign_stack_local.  All callers changed to use new
	name.
	(assign_stack_local): Just call assign_stack_local_1.
	(free_after_compilation): New function.
	(put_reg_into_stack): Simplify to always call assign_stack_local_1.
	(trampoline_address): Likewise.
	(assign_parms): Use xcalloc/xrealloc to allocate parm_reg_stack_loc.
	(prepare_function_start): Explicitly clear some more variables.
	* function.h (struct function): New elt can_garbage_collect.
	(mark_machine_status, mark_lang_status): Declare variables.
	(free_after_compilation, free_emit_status, free_varasm_status,
	init_varasm_status): Declare functions.
	* toplev.c (rest_of_compilation): Call free_after_compilation when
	done with the current function.
	* varasm.c (free_varasm_status): New function.

From-SVN: r29117