mirror/gcc
2
0
Fork 0
mirror of git://gcc.gnu.org/git/gcc.git synced 2025-04-05 05:00:26 +08:00
Code Issues Packages Projects Releases Wiki Activity

avr.h (machine_function): Add 'is_OS_main' field.

Browse Source 
* config/avr/avr.h (machine_function): Add 'is_OS_main' field.
	* config/avr/avr.c (avr_OS_main_function_p): Add new function.
	(avr_attribute_table): Add 'OS_main' function attribute.
	(avr_regs_to_save, expand_prologue, expand_epilogue): Handle
	functions with 'OS_main' attribute.

From-SVN: r135681
This commit is contained in:
Anatoly Sokolov 2008-05-21 01:23:08 +04:00 committed by Anatoly Sokolov
parent ede2e423f8
commit 9b678d9601
3 changed files with 36 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
gcc/ChangeLog
View File

@ -1,3 +1,11 @@
2008-05-20 Anatoly Sokolov <aesok@post.ru>
* config/avr/avr.h (machine_function): Add 'is_OS_main' field.
* config/avr/avr.c (avr_OS_main_function_p): Add new function.
(avr_attribute_table): Add 'OS_main' function attribute.
(avr_regs_to_save, expand_prologue, expand_epilogue): Handle
functions with 'OS_main' attribute.
2008-05-20 Richard Guenther <rguenther@suse.de>
PR tree-optimization/35204

27
gcc/config/avr/avr.c
View File

@ -52,6 +52,7 @@ static int avr_naked_function_p (tree);
static int interrupt_function_p (tree);
static int signal_function_p (tree);
static int avr_OS_task_function_p (tree);
static int avr_OS_main_function_p (tree);
static int avr_regs_to_save (HARD_REG_SET *);
static int sequent_regs_live (void);
static const char *ptrreg_to_str (int);
@ -446,6 +447,19 @@ avr_OS_task_function_p (tree func)
return a != NULL_TREE;
}
/* Return nonzero if FUNC is a OS_main function. */
static int
avr_OS_main_function_p (tree func)
{
tree a;
gcc_assert (TREE_CODE (func) == FUNCTION_DECL);
a = lookup_attribute ("OS_main", TYPE_ATTRIBUTES (TREE_TYPE (func)));
return a != NULL_TREE;
}
/* Return the number of hard registers to push/pop in the prologue/epilogue
of the current function, and optionally store these registers in SET. */
@ -464,9 +478,10 @@ avr_regs_to_save (HARD_REG_SET *set)
count = 0;
/* No need to save any registers if the function never returns or
is have "OS_task" attribute. */
is have "OS_task" or "OS_main" attribute. */
if (TREE_THIS_VOLATILE (current_function_decl)
|| cfun->machine->is_OS_task)
|| cfun->machine->is_OS_task
|| cfun->machine->is_OS_main)
return 0;
for (reg = 0; reg < 32; reg++)
@ -593,6 +608,7 @@ expand_prologue (void)
cfun->machine->is_interrupt = interrupt_function_p (current_function_decl);
cfun->machine->is_signal = signal_function_p (current_function_decl);
cfun->machine->is_OS_task = avr_OS_task_function_p (current_function_decl);
cfun->machine->is_OS_main = avr_OS_main_function_p (current_function_decl);
/* Prologue: naked. */
if (cfun->machine->is_naked)
@ -606,6 +622,7 @@ expand_prologue (void)
&& !cfun->machine->is_interrupt
&& !cfun->machine->is_signal
&& !cfun->machine->is_OS_task
&& !cfun->machine->is_OS_main
&& live_seq);
if (cfun->machine->is_interrupt || cfun->machine->is_signal)
@ -675,7 +692,7 @@ expand_prologue (void)
}
if (frame_pointer_needed)
{
if(!cfun->machine->is_OS_task)
if (!(cfun->machine->is_OS_task || cfun->machine->is_OS_main))
{
/* Push frame pointer. */
insn = emit_move_insn (pushword, frame_pointer_rtx);
@ -829,6 +846,7 @@ expand_epilogue (void)
&& !cfun->machine->is_interrupt
&& !cfun->machine->is_signal
&& !cfun->machine->is_OS_task
&& !cfun->machine->is_OS_main
&& live_seq);
if (minimize && (frame_pointer_needed || live_seq > 4))
@ -891,7 +909,7 @@ expand_epilogue (void)
emit_move_insn (stack_pointer_rtx, frame_pointer_rtx);
}
}
if(!cfun->machine->is_OS_task)
if (!(cfun->machine->is_OS_task || cfun->machine->is_OS_main))
{
/* Restore previous frame_pointer. */
emit_insn (gen_pophi (frame_pointer_rtx));
@ -4593,6 +4611,7 @@ const struct attribute_spec avr_attribute_table[] =
{ "interrupt", 0, 0, true, false, false, avr_handle_fndecl_attribute },
{ "naked", 0, 0, false, true, true, avr_handle_fntype_attribute },
{ "OS_task", 0, 0, false, true, true, avr_handle_fntype_attribute },
{ "OS_main", 0, 0, false, true, true, avr_handle_fntype_attribute },
{ NULL, 0, 0, false, false, false, NULL }
};

6
gcc/config/avr/avr.h
View File

@ -1042,7 +1042,11 @@ struct machine_function GTY(())
as specified by the "signal" attribute. */
int is_signal;
/* 'true' - if current function is a signal function
/* 'true' - if current function is a 'task' function
as specified by the "OS_task" attribute. */
int is_OS_task;
/* 'true' - if current function is a 'main' function
as specified by the "OS_main" attribute. */
int is_OS_main;
};