[PATCH] Implement -fstack-usage

[Eric Botcazou]

Hi,

While we are at it, here is another patch whose submission was delayed because 
of the already substantial backlog of AdaCore patches.  This is related to
 http://www.gccsummit.org/2005/view_abstract.php?content_key=18

Tested on i586-suse-linux. 


2006-06-19  Eric Botcazou  <ebotcazou@adacore.com>

	Stack usage support
	* common.opt (-fstack-usage): New option.
	* doc/invoke.texi (Debugging options): Document it.
	* expr.h (allocate_dynamic_stack_space): Add 4th bool parameter.
	* builtins.c (expand_builtin_apply): Pass TRUE as 4th argument to
	allocate_dynamic_stack_space.
	(expand_builtin_alloca): Add 4th bool parameter CANNOT_ACCUMULATE
	and propagate it to allocate_dynamic_stack_space.
	(expand_builtin) <BUILT_IN_ALLOCA>: Adjust for above change.
	* calls.c (initialize_argument_information): Pass TRUE as 4th
	argument to allocate_dynamic_stack_space.
	(expand_call): Set current_function_has_unbounded_dynamic_stack_size
	to 1 when pushing a variable-sized argument onto the stack.  Pass
	TRUE as 4th argument to allocate_dynamic_stack_space.
	Update current_function_pushed_stack_size.
	(emit_library_call_value_1): Likewise.
	* explow.c (allocate_dynamic_stack_space): Add 4th bool parameter
	CANNOT_ACCUMULATE.  If flag_stack_usage, look into the size and
	attempt to find an upper bound.  Remove redundant code for the
	SETJMP_VIA_SAVE_AREA case.
	* flow.c (rest_of_handle_flow2): Invoke output_stack_usage if needed.
	* function.h (struct function): Add new fields pushed_stack_size,
	dynamic_alloc_count, dynamic_stack_size and
	has_unbounded_dynamic_stack_size.
	(current_function_pushed_stack_size): New macro.
	(current_function_dynamic_alloc_count): Likewise.
	(current_function_dynamic_stack_size): Likewise.
	(current_function_has_unbounded_dynamic_stack_size): Likewise.
	(current_function_allocates_dynamic_stack_space): Likewise.
	* function.c (instantiate_virtual_regs): If SETJMP_VIA_SAVE_AREA,
	add the value of the dynamic offset to the dynamic stack usage.
	* gimplify.c (gimplify_decl_expr): Set CALL_FROM_THUNK_P on the call
	to BUILT_IN_ALLOCA for variable-sized objects.
	* stmt.c (expand_decl): Pass true to allocate_dynamic_stack_space.
	* toplev.h (output_stack_usage): Declare.
	* toplev.c (stack_usage_file): New file pointer.
	(output_stack_usage): New function.
	(open_auxiliary_file): Likewise.
	(lang_dependent_init): Open file if flag_stack_usage is set.
	(finalize): Close file if stack_usage_file is not null.
	* tree.h (CALL_FROM_THUNK_P): Document specialized usage.
	* target.h (struct gcc_target): Add get_static_stack_usage.
	* target-def.h (TARGET_GET_STATIC_STACK_USAGE): Define to 0.
	(TARGET_INITIALIZER): Add it.
	* doc/tm.texi (Frame layout): Document it.
	* config/alpha/alpha.c (compute_frame_size): New function.
	(alpha_expand_prologue): Use it.
	(alpha_start_function): Likewise.
	(alpha_expand_epilogue): Likewise.
	(alpha_get_static_stack_usage): New function.
	(TARGET_GET_STATIC_STACK_USAGE): Define to it.
	* config/i386/i386.c (ix86_get_static_stack_usage): New function.
	(TARGET_GET_STATIC_STACK_USAGE): Define to it.
	* config/ia64/ia64.c (ia64_get_static_stack_usage): New function.
	(TARGET_GET_STATIC_STACK_USAGE): Define to it.
	* config/mips/mips.c (mips_get_static_stack_usage): New function.
	(TARGET_GET_STATIC_STACK_USAGE): Define to it.
	* config/pa/pa.c (pa_get_static_stack_usage): New function.
	(TARGET_GET_STATIC_STACK_USAGE): Define to it.
	* config/rs6000/rs6000.c (rs6000_get_static_stack_usage): New.
	(TARGET_GET_STATIC_STACK_USAGE): Define to it.
	* config/sparc/sparc.c (sparc_get_static_stack_usage): New function.
	(TARGET_GET_STATIC_STACK_USAGE): Define to it.


-- 
Eric Botcazou
-------------- next part --------------
A non-text attachment was scrubbed...
Name: f506-002-2_fsf.diff
Type: text/x-diff
Size: 40484 bytes
Desc: not available
URL: <http://gcc.gnu.org/pipermail/gcc-patches/attachments/20060619/47f04ff9/attachment.bin>