r133388 - in /branches/stack/gcc: ChangeLog.sta...

Thu Mar 20 16:52:00 GMT 2008

Author: hjl
Date: Thu Mar 20 16:52:48 2008
New Revision: 133388

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=133388
Log:
2008-03-19  Joey Ye  <joey.ye@intel.com>
	    H.J. Lu  <hongjiu.lu@intel.com>
	    Xuepeng Guo  <xuepeng.guo@intel.com>

	* builtins.c (expand_builtin_setjmp_receiver): Replace
	virtual_incoming_args_rtx with
	current_function_internal_arg_pointer.
	(expand_builtin_apply_args_1): Likewise.

	* calls.c (expand_call): Don't calculate preferred stack
	boundary according to incoming stack boundary. Replace 
	virtual_incoming_args_rtx with
	current_function_internal_arg_pointer.

	* cfgexpand.c (get_decl_align_unit): Estimate stack variable
	alignment and store to stack_alignment_estimated.
	(expand_one_var): Likewise.
	(gate_stack_realign): Gate new pass pass_collect_stackrealign_info
	and pass_handle_drap.
	(collect_stackrealign_info): Execute new pass
	pass_collect_stackrealign_info.
	(pass_collect_stackrealign_info): Define new pass.
	(handle_drap): Execute new pass pass_handle_drap.
	(pass_handle_drap): Define new pass.

	* defaults.h (MAX_VECTORIZE_STACK_ALIGNMENT): New.

	* dojump.c (clear_pending_stack_adjust): Leave an FIXME in
	comments in case pending stack ajustment is discard when stack 
	realign is needed.

	* flags.h (frame_pointer_needed): Removed.
	* final.c (frame_pointer_needed): Likewise.

	* function.c (assign_stack_local_1): Estimate stack variable 
	alignment and store to stack_alignment_estimated.
	(instantiate_new_reg): Instantiate virtual incoming args rtx to
	vDRAP if stack realignment and DRAP is needed.
	(assign_parms): Collect parameter/return type alignment and 
	contribute to stack_alignment_estimated.
	(locate_and_pad_parm): Likewise.
	(allocate_struct_function): Init stack_alignment_estimated.
	(get_arg_pointer_save_area): Replace virtual_incoming_args_rtx
	with current_function_internal_arg_pointer.

	* function.h (function): Add drap_reg, stack_alignment_estimated,
	need_frame_pointer, need_frame_pointer_set, stack_realign_needed,
	stack_realign_really, need_drap, save_param_ptr_reg,
	stack_realign_processed, and stack_realign_finalized.
	(frame_pointer_needed): New.
	(stack_realign_fp): Likewise.
	(stack_realign_drap): Likewise.

	* global.c (compute_regsets): Set frame_pointer_needed cannot_elim
	wrt stack_realign_needed.

	* stmt.c (expand_nl_goto_receiver): Replace 
	virtual_incoming_args_rtx with
	current_function_internal_arg_pointer.

	* passes.c (pass_collect_stackrealign_info): Insert this new pass
	immediately before expand.
	(pass_handle_drap): Insert this new pass immediately after expand.

	* tree-inline.c (expand_call_inline): Estimate stack variable
	alignment and store to stack_alignment_estimated.

	* tree-pass.h (pass_handle_drap): New.
	(pass_collect_stackrealign_info): Likewise.

	* tree-vectorizer.c (vect_can_force_dr_alignment_p): Estimate
	stack variable alignment and store to stack_alignment_estimated.

	* reload1.c (set_label_offsets): Assert that frame pointer must be
	elimiated to stack pointer in case stack realignment is estimated
	to happen without DRAP.
	(elimination_effects): Likewise.
	(eliminate_regs_in_insn): Likewise.
	(mark_not_eliminable): Likewise.
	(update_eliminables): Frame pointer is needed in case of stack
	realignment needed.
	(init_elim_table): Don't set frame_pointer_needed here.

	* config/i386/i386.c (ix86_force_align_arg_pointer_string): Break
	long line.
	(ix86_user_incoming_stack_boundary): New.
	(ix86_default_incoming_stack_boundary): Likewise.
	(ix86_incoming_stack_boundary): Likewise.
	(find_drap_reg): Likewise.
	(override_options): Overide option value for new options.
	(ix86_function_ok_for_sibcall): Sibcall is OK even stack need
	realigning.
	(ix86_handle_cconv_attribute): Stack realign no longer impacts
	number of regparm.
	(ix86_function_regparm): Likewise.
	(setup_incoming_varargs_64): Remove the logic to set
	stack_alignment_needed here.
	(ix86_va_start): Replace virtual_incoming_args_rtx with
	current_function_internal_arg_pointer.
	(ix86_save_reg): Replace force_align_arg_pointer with drap_reg.
	(ix86_compute_frame_layout): Compute frame layout wrt stack
	realignment.
	(ix86_internal_arg_pointer): Estimate if stack realignment is
	needed and returns appropriate arg pointer rtx accordingly.
	(ix86_expand_prologue): Finally decide if stack realignment
	is needed and generate prologue code accordingly.
	(ix86_expand_epilogue): Generate epilogue code wrt stack
	realignment is really needed or not.

	* config/i386/i386.h (MAIN_STACK_BOUNDARY): New.
	(ABI_STACK_BOUNDARY): Likewise.
	PREFERRED_STACK_BOUNDARY_DEFAULT): Likewise.
	(STACK_REALIGN_DEFAULT): Likewise.
	(INCOMING_STACK_BOUNDARY): Likewise.
	(MAX_VECTORIZE_STACK_ALIGNMENT): Likewise.
	(ix86_incoming_stack_boundary): Likewise.
	(REAL_PIC_OFFSET_TABLE_REGNUM): Updated to use BX_REG.
	(CAN_ELIMINATE): Redefine the macro to eliminate frame pointer to
	stack pointer and arg pointer to hard frame pointer in case of
	stack realignment without DRAP.
	(machine_function): Remove force_align_arg_pointer.

	* config/i386/i386.md (BX_REG): New.
	(R13_REG): Likewise.

	* config/i386/i386.opt (mforce_drap): New.
	(mincoming-stack-boundary): Likewise.
	(mstackrealign): Updated.

	* doc/extend.texi: Update force_align_arg_pointer.
	* doc/invoke.texi: Document -mincoming-stack-boundary.  Update
	-mstackrealign.

Modified:
    branches/stack/gcc/ChangeLog.stackalign
    branches/stack/gcc/builtins.c
    branches/stack/gcc/calls.c
    branches/stack/gcc/cfgexpand.c
    branches/stack/gcc/config/i386/i386.c
    branches/stack/gcc/config/i386/i386.h
    branches/stack/gcc/config/i386/i386.md
    branches/stack/gcc/config/i386/i386.opt
    branches/stack/gcc/defaults.h
    branches/stack/gcc/doc/extend.texi
    branches/stack/gcc/doc/invoke.texi
    branches/stack/gcc/dojump.c
    branches/stack/gcc/final.c
    branches/stack/gcc/flags.h
    branches/stack/gcc/function.c
    branches/stack/gcc/function.h
    branches/stack/gcc/global.c
    branches/stack/gcc/passes.c
    branches/stack/gcc/reload1.c
    branches/stack/gcc/stmt.c
    branches/stack/gcc/tree-inline.c
    branches/stack/gcc/tree-pass.h
    branches/stack/gcc/tree-vectorizer.c