RTL prologue/epilogue for SPARC

	RTL prologue/epilogue for SPARC
	* config/sparc/sparc-protos.h (sparc_emitting_epilogue): Delete.
	(sparc_skip_caller_unimp): Likewise.
	(load_pic_register): Likewise.
	(leaf_return_peephole_ok): Likewise.
	(compute_frame_size): Rename into sparc_compute_frame_size.
	(sparc_expand_prologue): New prototype.
	(sparc_expand_epilogue): Likewise.
	(output_return): Likewise.
	(eligible_for_epilogue_delay): Rename into eligible_for_return_delay.
	* config/sparc/sparc.h (INITIAL_ELIMINATION_OFFSET): Adjust call to
	compute_frame_size.  Move comment up.
	(DELAY_SLOTS_FOR_EPILOGUE): Delete.
	(ELIGIBLE_FOR_EPILOGUE_DELAY): Likewise.
	(EPILOGUE_USES): Return true for %g1 if the function uses EH return.
	* config/sparc/sparc.md (UNSPECV_SAVEW): New constant.
	(type attribute): Add 'return' and 'savew'.
	(eligible_for_return_delay): New attribute.
	(return): New delay_slot.
	(sibcall_epilogue): Call sparc_expand_epilogue.
	(prologue): Likewise.  Move up.
	(save_register_window): New expander.
	(save_register_windowsi): New pattern.
	(save_register_windowdi): Likewise.
	(epilogue): New expander.
	(return_internal): New pattern.
	(Return peepholes): Delete.
	* config/sparc/sparc.c (SIBCALL_SLOT_EMPTY_P): New macro.
	(sparc_emitting_epilogue): Delete.
	(sparc_skip_caller_unimp): Likewise.
	(sparc_sr_alias_set): New global variable.
	(frame_base_name): Delete.
	(frame_base_reg): New global variable.
	(sparc_override_options): Get new alias set for save/restore.
	(leaf_return_peephole_ok): Delete.
	(eligible_for_epilogue_delay): Rename into eligible_for_return_delay.
	Factor out code into eligible_for_restore_insn_delay.
	(eligible_for_restore_insn_delay): New function extraced from above.
	Use IN_UNCOND_BRANCH_DELAY_TRUE instead of IN_BRANCH_DELAY_TRUE.
	(eligible_for_sibcall_delay): Use SIBCALL_SLOT_EMPTY_P.
	Factor out code into eligible_for_restore_insn_delay.
	(load_pic_register): Make static.  Remove check.
	(save_regs): Delete.
	(restore_regs): Likewise.
	(compute_frame_size): Rename into sparc_compute_frame_size.
	Rename leaf_function into leaf_function_p.
	(build_big_number): Delete.
	(save_or_restore_regs): New function.
	(emit_save_regs): Likewise.
	(emit_restore_regs): Likewise.
	(emit_stack_pointer_increment ): Likewise.
	(emit_stack_pointer_decrement): Likewise.
	(sparc_expand_prologue): Likewise.
	(sparc_function_prologue): Rename into sparc_asm_function_prologue.
	Remove all code to emit instructions.
	(sparc_expand_epilogue): New function.
	(sparc_function_epilogue): Rename into sparc_asm_function_epilogue.
	Remove all code to emit instructions.
	(output_restore): New function.
	(output_return): Likewise.
	(output_sibcall): Factor out code into output_restore.
	(print_operand): Adjust for frame_base_reg.
	* target.h (struct gcc_target): New field 'late_rtl_prologue_epilogue'.
	* target-def.h (TARGET_LATE_RTL_PROLOGUE_EPILOGUE): New define.
	(TARGET_INITIALIZER): Add it.
	* passes.c (rest_of_compilation): Set the conditional predicate
	'current_function_uses_only_leaf_regs' before sched2.  If target
	has 'late_rtl_prologue_epilogue', emit RTL prologue/epilogue right
	before sched2.
	* reorg.c (return_insn_p): New predicate.
	(find_end_label): Use it.
	(relax_delay_slots): Do not thread an unconditional jump that points
	to the end return label.
	* doc/tm.texi (Registers) <Leaf Functions>: Clarify the validity
	domain of 'current_function_uses_only_leaf_regs'.
	(Stack and Calling) <Function Entry>: Document new target hook
	TARGET_LATE_RTL_PROLOGUE_EPILOGUE.

From-SVN: r83901

1 files changed, 5 insertions, 7 deletions

diff --git a/gcc/config/sparc/sparc-protos.h b/gcc/config/sparc/sparc-protos.h
index 4b1f9f0..2f2ee51 100644
--- a/gcc/config/sparc/sparc-protos.h
+++ b/gcc/config/sparc/sparc-protos.h
@@ -24,9 +24,6 @@ Boston, MA 02111-1307, USA.  */
 #ifndef __SPARC_PROTOS_H__
 #define __SPARC_PROTOS_H__
 
-extern bool sparc_emitting_epilogue;
-extern bool sparc_skip_caller_unimp;
-
 #ifdef TREE_CODE
 extern struct rtx_def *function_value (tree, enum machine_mode, int);
 extern void function_arg_advance (CUMULATIVE_ARGS *,
@@ -49,14 +46,14 @@ extern enum direction function_arg_padding (enum machine_mode, tree);
 #endif /* ARGS_SIZE_RTX */
 #endif /* TREE_CODE */
 
-extern void load_pic_register (void);
 extern void order_regs_for_local_alloc (void);
-extern HOST_WIDE_INT compute_frame_size (HOST_WIDE_INT, int);
+extern HOST_WIDE_INT sparc_compute_frame_size (HOST_WIDE_INT, int);
+extern void sparc_expand_prologue (void);
+extern void sparc_expand_epilogue (void);
 extern int check_pic (int);
 extern int short_branch (int, int);
 extern void sparc_profile_hook (int);
 extern void sparc_override_options (void);
-extern int leaf_return_peephole_ok (void);
 extern void sparc_output_scratch_registers (FILE *);
 
 #ifdef RTX_CODE
@@ -87,6 +84,7 @@ extern void sparc_emit_set_symbolic_const64 (rtx, rtx, rtx);
 extern int sparc_splitdi_legitimate (rtx, rtx);
 extern int sparc_absnegfloat_split_legitimate (rtx, rtx);
 extern char *output_cbranch (rtx, rtx, int, int, int, int, rtx);
+extern const char *output_return (rtx);
 extern const char *output_sibcall (rtx, rtx);
 extern char *output_v9branch (rtx, rtx, int, int, int, int, int, rtx);
 extern void emit_v9_brxx_insn (enum rtx_code, rtx, rtx);
@@ -99,7 +97,7 @@ extern int fp_zero_operand (rtx, enum machine_mode);
 extern int reg_or_0_operand (rtx, enum machine_mode);
 extern int tls_symbolic_operand (rtx);
 extern int empty_delay_slot (rtx);
-extern int eligible_for_epilogue_delay (rtx, int);
+extern int eligible_for_return_delay (rtx);
 extern int eligible_for_sibcall_delay (rtx);
 extern int tls_call_delay (rtx);
 extern int emit_move_sequence (rtx, enum machine_mode);