2007-08-27 Sandra Loosemore <sandra@codesourcery.com>

	    David Ung  <davidu@mips.com>
            Nigel Stephens <nigel@mips.com>

	gcc/
	Separate target-specific initialization from general
	back-end initialization.

	* toplev.c (init_alignments): New, split out from...
	(process_options): ...here.
	(backend_init_target):  New, split out from...
	(backend_init): ...here.
	(lang_dependent_init_target):  New, split out from...
	(lang_dependent_init): ...here.
	(target_reinit): New.
	* toplev.h (target_reinit): Declare.
	* expr.c (init_expr_target): Renamed from init_expr_once, since it
	now can be called more than once.  Update comments.
	* expr.h (init_expr_target): Likewise.
	* alias.c (init_alias_target): Renamed from init_alias_once, since it
	now can be called more than once.  Explicitly zero
	static_reg_base_value.
	* emit-rtl.c (init_emit_regs): New, split out from...
	(init_emit_once): Here.
	* regclass.c (initial_fixed_regs, initial_call_used_regs): Make
	non-const, so that changes from command-line arguments can overwrite
	values provided by the static initializers.
	(initial_call_really_used_regs): New, used similarly to the above.
	(initial_reg_names): Likewise.
	(last_mode_for_init_move_cost): Promoted function-local static to
	file-scope static to make it accessible outside init_move_cost.
	(init_reg_sets): Do not initialize fixed_regs and call_used_regs yet.
	Do not initialize inv_reg_alloc_order yet, either.  Do initialize
	reg_names since it is needed for parsing command-line options.
	(init_move_cost): Use last_mode_for_init_move_cost instead of
	function-local static.
	(init_reg_sets_1): Initialize fixed_regs, call_used_regs, and
	call_really_used_regs now.  Reinitialize reg_names.  Also
	initialize inv_reg_alloc_order.  Zero reg_class_subunion and
	reg_class_superunion.  Clear losing_caller_save_reg_set.
	Preserve global registers if called more than once.  Reset
	move cost, may_move_in_cost, may_move_out_cost, and
	last_mode_for_init_move_cost.
	(init_reg_modes_target): Renamed from init_reg_modes_once, since it
	can now be invoked more than once.  Update comments.
	(init_regs): Update comments.
	(fix_register): Update initial_fixed_regs, initial_call_used_regs,
	and initial_call_really_used_regs, instead of the non-initial 
        variables.  This allows us to save the command-line register settings
	after target reinitialization.
	(init_reg_autoinc): Zero forbidden_inc_dec_classes.
	* rtl.h (init_emit_regs): Declare.
	(init_reg_modes_target, init_alias_target): Renamed as described
	above.
	* reload1.c (init_reload): Update comments.
	* optabs.c (init_optabs): Likewise.
	* cfgloopanal.c (init_set_costs): Explicitly zero target_avail_regs.
	



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@127832 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 3 insertions, 2 deletions

diff --git a/gcc/rtl.h b/gcc/rtl.h
index 9f36cdaf22d..85996585848 100644
--- a/gcc/rtl.h
+++ b/gcc/rtl.h
@@ -2077,6 +2077,7 @@ extern int get_max_uid (void);
 extern int in_sequence_p (void);
 extern void force_next_line_note (void);
 extern void init_emit (void);
+extern void init_emit_regs (void);
 extern void init_emit_once (int);
 extern void push_topmost_sequence (void);
 extern void pop_topmost_sequence (void);
@@ -2186,7 +2187,7 @@ extern void build_insn_chain (rtx);
 extern int reg_classes_intersect_p (enum reg_class, enum reg_class);
 extern int reg_class_subset_p (enum reg_class, enum reg_class);
 extern void globalize_reg (int);
-extern void init_reg_modes_once (void);
+extern void init_reg_modes_target (void);
 extern void init_regs (void);
 extern void init_fake_stack_mems (void);
 extern void init_reg_sets (void);
@@ -2254,7 +2255,7 @@ extern int canon_true_dependence (const_rtx, enum machine_mode, rtx, const_rtx,
 extern int read_dependence (const_rtx, const_rtx);
 extern int anti_dependence (const_rtx, const_rtx);
 extern int output_dependence (const_rtx, const_rtx);
-extern void init_alias_once (void);
+extern void init_alias_target (void);
 extern void init_alias_analysis (void);
 extern void end_alias_analysis (void);
 extern bool memory_modified_in_insn_p (const_rtx, const_rtx);