* emit-rtl.c (free_emit_status): Take decl as a parameter.

	(init_emit_once): Add more GC roots.
	* except.c (mark_func_eh_entry): New function.
	(mark_eh_node): Mark false_label and rethrow_label.
	(init_eh): Add more GC roots.
	* function.c (free_after_compilation): Take decl as a paramter.
	Call free_stmt_status.
	(mark_function_state): Don't assume x_parm_reg_stack_loc is
	non-NULL.
	* function.h (free_after_compilation): Change prototype.
	(free_varasm_status): Likewise.
	(free_emit_status): Likewise.
	(free_stmt_status): New function.
	* ggc-simple.c (rtx, vecs, trees, strings, bytes_alloced_since_gc):
	Remove, replacing with ...
	(ggc_status): New structure.
	(ggc_chain): New variable.
	(init_gcc): Define.
	(ggc_push_context): New function.
	(ggc_pop_context): Likewise.
	(ggc_alloc_rtx): Adjust for use of ggc_chain.
	(ggc_alloc_rtvec): Likewise.
	(ggc_alloc_tree): Likewise.
	(ggc_alloc_string): Likewise.
	(ggc_mark_rtx): Mark NOTE_SOURCE_FILE and NOTE_RANGE_INFO.
	(ggc_mark_tree): Give language-dependent code a chance to mark
	`x' nodes.
	(ggc_mark_tree_varray): Handle empty arrays.
	(ggc_collect): Adjust for use of ggc_chain.  Clear
	bytes_alloced_since_last_gc.
	* ggc.h (ggc_pop_context): New function.
	(ggc_push_context): Likewise.
	* print-tree.c (print_node): Don't print obstacks when GC'ing.
	* stmt.c (free_stmt_status): New function.
	(init_stmt_for_function): Clear last_expr_value.
	* toplev.c (rest_of_compilation): Always call free_after_compilation.
	Conditionalize call to ggc_collect.
	(main): Call init_ggc.
	* tree.c (push_obstacks): Do the push, even when GC'ing.
	(push_obstacks_nochange): Likewise.
	(pop_obstacks): Liekwise.
	* varasm.c (free_varasm_status): Take decl as a parameter.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@29170 138bc75d-0d04-0410-961f-82ee72b054a4

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