2003-06-18 Stephen Clarke <stephen.clarke@superh.com>

            J"orn Rennecke <joern.rennecke@superh.com>

	* bt-load.c: New file.
	* Makefile.in (OBJS): Include bt-load.o
	(bt-load.o): Add dependencies.
	* flags.h (flag_branch_target_load_optimize): Declare.
	(flag_branch_target_load_optimize2): Likewise.
	* hooks.c (hook_reg_class_void_no_regs): New function.
	(hook_bool_bool_false): Likewise.
	* hooks.h (hook_reg_class_void_no_regs, hook_bool_bool_false): Declare.
	* rtl.h (branch_target_load_optimize): Declare.
	* target-def.h (TARGET_BRANCH_TARGET_REGISTER_CLASS): Define.
	(TARGET_BRANCH_TARGET_REGISTER_CALLEE_SAVED): Likewise.
	(TARGET_INITIALIZER): Include these.
	* target.h (struct gcc_target): Add branch_target_register_class
	and branch_target_register_callee_saved members.
	* toplev.c (enum dump_file_index): Add DFI_branch_target_load
	(dump_file) Add "tars" entry.
	(flag_branch_target_load_optimize): New variable.
	(flag_branch_target_load_optimize2): Likewise.
	(lang_independent_options): Add entries for new options.
	(rest_of_compilation): Call branch_target_load_optimize.
	* doc/tm.texi (TARGET_BRANCH_TARGET_REGISTER_CLASS): Document.
	(TARGET_BRANCH_TARGET_REGISTER_CALLEE_SAVED): Likewise.
	* doc/invoke.texi: Document -fbranch-target-load-optimize and
	-fbranch-target-load-optimize2.
	* rtl.h (epilogue_completed): Declare.
	* recog.c (epilogue_completed): New variable.
	* toplev.c (rest_of_compilation): Set it.
	* flow.c (mark_regs_live_at_end): Use it.
	* config/ia64/ia64.c (ia64_output_mi_thunk): Set it.
	* config/rs6000/rs6000.c (rs6000_output_mi_thunk): Likewise.
	* config/sh/sh.c (sh_output_mi_thunk): Likewise.
	* config/sparc/sparc.c (sparc_output_mi_thunk): Likewise.

	* sh.c (shmedia_space_reserved_for_target_registers): New variable.
	(sh_target_reg_class): New function.
	(sh_optimize_target_register_callee_saved): Likwise.
	(shmedia_target_regs_stack_space): Likewise.
	(shmedia_reserve_space_for_target_registers_p): Likewise.
	(shmedia_target_regs_stack_adjust): Likewise.
	(TARGET_BRANCH_TARGET_REGISTER_CLASS): Override.
	(TARGET_BRANCH_TARGET_REGISTER_CALLEE_SAVED): Likewise.
	(calc_live_regs): If flag_branch_target_load_optimize2 and
	TARGET_SAVE_ALL_TARGET_REGS is enabled, and we have space reserved
	for target registers, make sure that we save all target registers.
	(sh_expand_prologue, sh_expand_epilogue): Take target register
	optimizations into account.  Collapse stack adjustments if that
	is beneficial.
	(initial_elimination_offset): Reserve space for target registers
	if necessary.
	* sh.h (SAVE_ALL_TR_BIT, TARGET_SAVE_ALL_TARGET_REGS): Define.
	(OPTIMIZATION_OPTIONS): Enable flag_branch_target_load_optimize.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@68165 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 4 insertions, 0 deletions

diff --git a/gcc/rtl.h b/gcc/rtl.h
index 6687aed044b..b19bc1fc10d 100644
--- a/gcc/rtl.h
+++ b/gcc/rtl.h
@@ -1965,6 +1965,9 @@ extern int flow2_completed;
 
 extern int reload_completed;
 
+/* Nonzero after thread_prologue_and_epilogue_insns has run.  */
+extern int epilogue_completed;
+
 /* Set to 1 while reload_as_needed is operating.
    Required by some machines to handle any generated moves differently.  */
 
@@ -2123,6 +2126,7 @@ extern rtx libcall_other_reg		PARAMS ((rtx, rtx));
 #ifdef BUFSIZ
 extern void loop_optimize		PARAMS ((rtx, FILE *, int));
 #endif
+extern void branch_target_load_optimize (rtx, bool);
 extern void record_excess_regs		PARAMS ((rtx, rtx, rtx *));
 
 /* In function.c */