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calls.c (save_fixed_argument_area): Tidy.

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* calls.c (save_fixed_argument_area): Tidy.
	(restore_fixed_argument_area): Tidy.  Set alignment of stack_area.
	(expand_call): Comment typo fixes.  Don't init low_to_save.  Start
	call chain loop at 1 if !try_tail_call.  Formatting.
	(emit_library_call_value_1): Don't init low_to_save or high_to_save.
	Use save_fixed_argument_area and restore_fixed_argument_area.

From-SVN: r61818
This commit is contained in:
Alan Modra 2003-01-26 02:07:48 +00:00 committed by Alan Modra
parent 42510de4e1
commit b820d2b870
2 changed files with 79 additions and 148 deletions
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9
gcc/ChangeLog
View File

@ -1,3 +1,12 @@
2003-01-26 Alan Modra <amodra@bigpond.net.au>
* calls.c (save_fixed_argument_area): Tidy.
(restore_fixed_argument_area): Tidy. Set alignment of stack_area.
(expand_call): Comment typo fixes. Don't init low_to_save. Start
call chain loop at 1 if !try_tail_call. Formatting.
(emit_library_call_value_1): Don't init low_to_save or high_to_save.
Use save_fixed_argument_area and restore_fixed_argument_area.
2003-01-26 Michael Hayes <m.hayes@elec.canterbury.ac.nz>
* df.c (df_uses_record): Handle CC0.

182
gcc/calls.c
View File

@ -1,6 +1,6 @@
/* Convert function calls to rtl insns, for GNU C compiler.
Copyright (C) 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998
1999, 2000, 2001 Free Software Foundation, Inc.
1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
This file is part of GCC.
@ -912,50 +912,50 @@ save_fixed_argument_area (reg_parm_stack_space, argblock,
int *low_to_save;
int *high_to_save;
{
int i;
rtx save_area = NULL_RTX;
int low;
int high;
/* Compute the boundary of the that needs to be saved, if any. */
/* Compute the boundary of the area that needs to be saved, if any. */
high = reg_parm_stack_space;
#ifdef ARGS_GROW_DOWNWARD
for (i = 0; i < reg_parm_stack_space + 1; i++)
#else
for (i = 0; i < reg_parm_stack_space; i++)
high += 1;
#endif
if (high > highest_outgoing_arg_in_use)
high = highest_outgoing_arg_in_use;
for (low = 0; low < high; low++)
if (stack_usage_map[low] != 0)
{
if (i >= highest_outgoing_arg_in_use
|| stack_usage_map[i] == 0)
continue;
if (*low_to_save == -1)
*low_to_save = i;
*high_to_save = i;
}
if (*low_to_save >= 0)
{
int num_to_save = *high_to_save - *low_to_save + 1;
enum machine_mode save_mode
= mode_for_size (num_to_save * BITS_PER_UNIT, MODE_INT, 1);
int num_to_save;
enum machine_mode save_mode;
int delta;
rtx stack_area;
rtx save_area;
/* If we don't have the required alignment, must do this in BLKmode. */
if ((*low_to_save & (MIN (GET_MODE_SIZE (save_mode),
while (stack_usage_map[--high] == 0)
;
*low_to_save = low;
*high_to_save = high;
num_to_save = high - low + 1;
save_mode = mode_for_size (num_to_save * BITS_PER_UNIT, MODE_INT, 1);
/* If we don't have the required alignment, must do this
in BLKmode. */
if ((low & (MIN (GET_MODE_SIZE (save_mode),
BIGGEST_ALIGNMENT / UNITS_PER_WORD) - 1)))
save_mode = BLKmode;
#ifdef ARGS_GROW_DOWNWARD
stack_area
= gen_rtx_MEM (save_mode,
memory_address (save_mode,
plus_constant (argblock,
- *high_to_save)));
delta = -high;
#else
delta = low;
#endif
stack_area = gen_rtx_MEM (save_mode,
memory_address (save_mode,
plus_constant (argblock,
*low_to_save)));
#endif
delta)));
set_mem_align (stack_area, PARM_BOUNDARY);
if (save_mode == BLKmode)
@ -969,11 +969,13 @@ save_fixed_argument_area (reg_parm_stack_space, argblock,
save_area = gen_reg_rtx (save_mode);
emit_move_insn (save_area, stack_area);
}
}
return save_area;
}
return NULL_RTX;
}
static void
restore_fixed_argument_area (save_area, argblock, high_to_save, low_to_save)
rtx save_area;
@ -982,19 +984,18 @@ restore_fixed_argument_area (save_area, argblock, high_to_save, low_to_save)
int low_to_save;
{
enum machine_mode save_mode = GET_MODE (save_area);
int delta;
rtx stack_area;
#ifdef ARGS_GROW_DOWNWARD
rtx stack_area
= gen_rtx_MEM (save_mode,
memory_address (save_mode,
plus_constant (argblock,
- high_to_save)));
delta = -high_to_save;
#else
rtx stack_area
= gen_rtx_MEM (save_mode,
memory_address (save_mode,
plus_constant (argblock,
low_to_save)));
delta = low_to_save;
#endif
stack_area = gen_rtx_MEM (save_mode,
memory_address (save_mode,
plus_constant (argblock, delta)));
set_mem_align (stack_area, PARM_BOUNDARY);
if (save_mode != BLKmode)
emit_move_insn (stack_area, save_area);
@ -2194,8 +2195,8 @@ expand_call (exp, target, ignore)
int is_integrable = 0;
#ifdef REG_PARM_STACK_SPACE
/* Define the boundary of the register parm stack space that needs to be
save, if any. */
int low_to_save = -1, high_to_save;
saved, if any. */
int low_to_save, high_to_save;
rtx save_area = 0; /* Place that it is saved */
#endif
@ -2632,7 +2633,7 @@ expand_call (exp, target, ignore)
/* We want to make two insn chains; one for a sibling call, the other
for a normal call. We will select one of the two chains after
initial RTL generation is complete. */
for (pass = 0; pass < 2; pass++)
for (pass = try_tail_call ? 0 : 1; pass < 2; pass++)
{
int sibcall_failure = 0;
/* We want to emit any pending stack adjustments before the tail
@ -2646,9 +2647,6 @@ expand_call (exp, target, ignore)
if (pass == 0)
{
if (! try_tail_call)
continue;
/* Emit any queued insns now; otherwise they would end up in
only one of the alternates. */
emit_queue ();
@ -3320,10 +3318,8 @@ expand_call (exp, target, ignore)
{
#ifdef REG_PARM_STACK_SPACE
if (save_area)
{
restore_fixed_argument_area (save_area, argblock,
high_to_save, low_to_save);
}
#endif
/* If we saved any argument areas, restore them. */
@ -3511,7 +3507,7 @@ emit_library_call_value_1 (retval, orgfun, value, fn_type, outmode, nargs, p)
#ifdef REG_PARM_STACK_SPACE
/* Define the boundary of the register parm stack space that needs to be
save, if any. */
int low_to_save = -1, high_to_save = 0;
int low_to_save, high_to_save;
rtx save_area = 0; /* Place that it is saved. */
#endif
@ -3892,62 +3888,9 @@ emit_library_call_value_1 (retval, orgfun, value, fn_type, outmode, nargs, p)
{
/* The argument list is the property of the called routine and it
may clobber it. If the fixed area has been used for previous
parameters, we must save and restore it.
Here we compute the boundary of the that needs to be saved, if any. */
#ifdef ARGS_GROW_DOWNWARD
for (count = 0; count < reg_parm_stack_space + 1; count++)
#else
for (count = 0; count < reg_parm_stack_space; count++)
#endif
{
if (count >= highest_outgoing_arg_in_use
|| stack_usage_map[count] == 0)
continue;
if (low_to_save == -1)
low_to_save = count;
high_to_save = count;
}
if (low_to_save >= 0)
{
int num_to_save = high_to_save - low_to_save + 1;
enum machine_mode save_mode
= mode_for_size (num_to_save * BITS_PER_UNIT, MODE_INT, 1);
rtx stack_area;
/* If we don't have the required alignment, must do this in BLKmode. */
if ((low_to_save & (MIN (GET_MODE_SIZE (save_mode),
BIGGEST_ALIGNMENT / UNITS_PER_WORD) - 1)))
save_mode = BLKmode;
#ifdef ARGS_GROW_DOWNWARD
stack_area = gen_rtx_MEM (save_mode,
memory_address (save_mode,
plus_constant (argblock,
-high_to_save)));
#else
stack_area = gen_rtx_MEM (save_mode,
memory_address (save_mode,
plus_constant (argblock,
low_to_save)));
#endif
if (save_mode == BLKmode)
{
save_area = assign_stack_temp (BLKmode, num_to_save, 0);
set_mem_align (save_area, PARM_BOUNDARY);
emit_block_move (save_area, stack_area, GEN_INT (num_to_save),
BLOCK_OP_CALL_PARM);
}
else
{
save_area = gen_reg_rtx (save_mode);
emit_move_insn (save_area, stack_area);
}
}
parameters, we must save and restore it. */
save_area = save_fixed_argument_area (reg_parm_stack_space, argblock,
&low_to_save, &high_to_save);
}
#endif
@ -4192,29 +4135,8 @@ emit_library_call_value_1 (retval, orgfun, value, fn_type, outmode, nargs, p)
{
#ifdef REG_PARM_STACK_SPACE
if (save_area)
{
enum machine_mode save_mode = GET_MODE (save_area);
#ifdef ARGS_GROW_DOWNWARD
rtx stack_area
= gen_rtx_MEM (save_mode,
memory_address (save_mode,
plus_constant (argblock,
- high_to_save)));
#else
rtx stack_area
= gen_rtx_MEM (save_mode,
memory_address (save_mode,
plus_constant (argblock, low_to_save)));
#endif
set_mem_align (stack_area, PARM_BOUNDARY);
if (save_mode != BLKmode)
emit_move_insn (stack_area, save_area);
else
emit_block_move (stack_area, save_area,
GEN_INT (high_to_save - low_to_save + 1),
BLOCK_OP_CALL_PARM);
}
restore_fixed_argument_area (save_area, argblock,
high_to_save, low_to_save);
#endif
/* If we saved any argument areas, restore them. */