From f317b732d3c8a7ae724857662356eb55b5bab071 Mon Sep 17 00:00:00 2001 From: ebotcazou Date: Wed, 30 Jun 2004 10:31:30 +0000 Subject: 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) : Clarify the validity domain of 'current_function_uses_only_leaf_regs'. (Stack and Calling) : Document new target hook TARGET_LATE_RTL_PROLOGUE_EPILOGUE. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@83901 138bc75d-0d04-0410-961f-82ee72b054a4 --- gcc/target.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'gcc/target.h') diff --git a/gcc/target.h b/gcc/target.h index da37fcd23bd..300ef57063d 100644 --- a/gcc/target.h +++ b/gcc/target.h @@ -521,6 +521,11 @@ struct gcc_target /* True if #pragma extern_prefix is to be supported. */ bool handle_pragma_extern_prefix; + /* True if the RTL prologue and epilogue should be expanded after all + passes that modify the instructions (and not merely reorder them) + have been run. */ + bool late_rtl_prologue_epilogue; + /* Leave the boolean fields at the end. */ }; -- cgit v1.2.1