./:	* df-problems.c (df_simulate_one_insn_forwards): Fix braces in
	switch.
	* gcov.c (read_count_file): Add braces around variables declared
	before label.

	* c.opt (Wjump-misses-init): New warning.
	* c-opts.c (c_common_handle_option): Set warn_jump_misses_init for
	-Wall and -Wc++-compat if not already set.
	(c_common_post_options): Clear warn_jump_misses_init if it was not
	set.
	* c-decl.c (struct c_binding): Change type field to a union with
	new label field.  Make it the first field in the struct.  Update
	references to type to use u.type instead.
	(struct c_spot_bindings): Define.
	(struct c_goto_bindings): Define.
	(c_goto_bindings_p): Define, along with VECs.
	(struct c_label_vars): Define.
	(struct c_scope): Add has_label_bindings field.
	(bind_label, set_spot_bindings): New static functions.
	(decl_jump_unsafe, update_spot_bindings): New static functions.
	(update_label_decls): New static function.
	(pop_scope): Call update_label_decls.  Don't call c_end_vm_scope.
	Update binding u.label field to shadowed field.
	(c_binding_start_stmt_expr): New function.
	(c_binding_end_stmt_expr): New function.
	(pushdecl): Don't call c_begin_vm_scope.
	(make_label): Add defining and p_label_vars parameters.  Change
	all callers.
	(lookup_label): Correct test for whether a label has not yet been
	defined.  Call bind_label rather than bind.
	(warn_about_goto): New static function.
	(lookup_label_for_goto): New function.
	(declare_label): Call bind_label rather than bind.
	(check_earlier_gotos): New static function.
	(define_label): Don't give errors about jumping into statement
	expressions or scopes of variably modified types.  Call
	set_spot_bindings and check_earlier_gotos.  Call bind_label
	instead of bind.  Don't set label_context_stack_se or
	label_context_stack_vm.
	(c_get_switch_bindings): New function.
	(c_release_switch_bindings): New function.
	(c_check_switch_jump_warnings): New function.
	(start_function): Don't set label_context_stack_se or
	label_context_stack_vm.
	(finish_function): Likewise.
	* c-typeck.c (label_context_stack_se): Don't define.
	(label_context_stack_vm): Don't define.
	(c_finish_goto_label): Call lookup_label_for_goto rather than
	lookup_label.  Don't give errors about jumping into a statement
	expression or the scope of a variably modified type.  Don't set
	label_context_stack_se or label_context_stack_vm.
	(struct c_switch): Remove blocked_stmt_expr and blocked_vm
	fields.  Add bindings field.
	(c_start_case): Don't set deleted fields.  Set bindings field.
	(do_case): Rework order of tests.  Don't check blocked_stmt_expr
	or blocked_vm.  Call c_check_switch_jump_warnings.
	(c_finish_case): Don't test blocked_stmt_expr field.  Call
	c_release_switch_bindings.
	(c_begin_stmt_expr): Don't increment blocked_stmt_expr in
	c_switch_stack.  Don't walk label_context_stack_se labels.  Don't
	set label_context_stack_se.  Call c_bindings_start_stmt_expr.
	(c_finish_stmt_expr): Don't decrement blocked_stmt_expr in
	c_switch_stack.  Don't walk label_context_stack_se labels.  Don't
	set label_context_stack_se.  Call c_bindings_end_stmt_expr.
	(c_begin_vm_scope, c_end_vm_scope): Don't define.
	* c-tree.h (C_DECL_UNJUMPABLE_STMT_EXPR): Don't define.
	(C_DECL_UNDEFINABLE_STMT_EXPR): Don't define.
	(C_DECL_UNJUMPABLE_VM): Don't define.
	(C_DECL_UNDEFINABLE_VM): Don't define.
	(struct c_label_list): Don't define.
	(struct c_label_context_se): Don't define.
	(struct c_label_context_vm): Don't define.
	(struct c_spot_bindings): Declare.
	(c_bindings_start_stmt_expr): Declare.
	(c_bindings_end_stmt_expr): Declare.
	(lookup_label_for_goto): Declare.
	(c_get_switch_bindings, c_release_switch_bindings): Declare.
	(c_check_switch_jump_warnings): Declare.
	(label_context_stack_se, label_context_stack_vm): Don't declare.
	(c_finish_goto_label): Update declaration.
	(c_begin_vm_scope, c_end_vm_scope): Don't declare.
	* doc/invoke.texi (Option Summary): Mention -Wjump-misses-init.
	(Warning Options): Document -Wjump-misses-init.
cp/:
	* parser.c (cp_parser_direct_declarator): Add braces around
	variables declared before label.
objc/:
	* objc-act.c (objc_start_function): Don't set
	label_context_stack_se or label_context_stack_vm.
testsuite/:
	* gcc.dg/Wjump-misses-init-1.c: New testcase.
	* gcc.dg/Wjump-misses-init-2.c: New testcase.
	* gcc.dg/c99-vla-jump-5.c: Adjust expected error messages.
	Recognize new notes.
	* gcc.dg/stmt-expr-label-2.c: Likewise.
	* gcc.dg/c99-vla-jump-1.c: Recognize new notes.  Fix column
	numbers.
	* gcc.dg/c99-vla-jump-2.c: Recognize new notes.
	* gcc.dg/c99-vla-jump-3.c: Recognize new notes.
	* gcc.dg/c99-vla-jump-4.c: Likewise.
	* gcc.dg/stmt-expr-label-1.c: Likewise.
	* gcc.dg/stmt-expr-label-3.c: Likewise.
	* gcc.dg/vla-8.c: Likewise.  Move error message to different
	line.

From-SVN: r148512