/* Compute register class preferences for pseudo-registers.
Copyright (C) 1987, 1988, 1991, 1992, 1993, 1994, 1995, 1996
- 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
+ 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
Free Software Foundation, Inc.
This file is part of GCC.
static move_table *may_move_out_cost[MAX_MACHINE_MODE];
+/* Keep track of the last mode we initialized move costs for. */
+static int last_mode_for_init_move_cost;
+
#ifdef FORBIDDEN_INC_DEC_CLASSES
/* These are the classes that regs which are auto-incremented or decremented
with moving single words, but probably isn't worth the trouble. */
void
-reg_set_to_hard_reg_set (HARD_REG_SET *to, bitmap from)
+reg_set_to_hard_reg_set (HARD_REG_SET *to, const_bitmap from)
{
unsigned i;
bitmap_iterator bi;
memcpy (fixed_regs, initial_fixed_regs, sizeof fixed_regs);
memcpy (call_used_regs, initial_call_used_regs, sizeof call_used_regs);
memset (global_regs, 0, sizeof global_regs);
-
-#ifdef REG_ALLOC_ORDER
- for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
- inv_reg_alloc_order[reg_alloc_order[i]] = i;
-#endif
}
/* Initialize may_move_cost and friends for mode M. */
init_move_cost (enum machine_mode m)
{
static unsigned short last_move_cost[N_REG_CLASSES][N_REG_CLASSES];
- static int last_mode = -1;
bool all_match = true;
unsigned int i, j;
all_match &= (last_move_cost[i][j] == cost);
last_move_cost[i][j] = cost;
}
- if (all_match && last_mode != -1)
+ if (all_match && last_mode_for_init_move_cost != -1)
{
- move_cost[m] = move_cost[last_mode];
- may_move_in_cost[m] = may_move_in_cost[last_mode];
- may_move_out_cost[m] = may_move_out_cost[last_mode];
+ move_cost[m] = move_cost[last_mode_for_init_move_cost];
+ may_move_in_cost[m] = may_move_in_cost[last_mode_for_init_move_cost];
+ may_move_out_cost[m] = may_move_out_cost[last_mode_for_init_move_cost];
return;
}
- last_mode = m;
+ last_mode_for_init_move_cost = m;
move_cost[m] = (move_table *)xmalloc (sizeof (move_table)
* N_REG_CLASSES);
may_move_in_cost[m] = (move_table *)xmalloc (sizeof (move_table)
}
}
+/* We need to save copies of some of the register information which
+ can be munged by command-line switches so we can restore it during
+ subsequent back-end reinitialization. */
+
+static char saved_fixed_regs[FIRST_PSEUDO_REGISTER];
+static char saved_call_used_regs[FIRST_PSEUDO_REGISTER];
+#ifdef CALL_REALLY_USED_REGISTERS
+static char saved_call_really_used_regs[FIRST_PSEUDO_REGISTER];
+#endif
+static const char *saved_reg_names[FIRST_PSEUDO_REGISTER];
+
+/* Save the register information. */
+
+void
+save_register_info (void)
+{
+ /* Sanity check: make sure the target macros FIXED_REGISTERS and
+ CALL_USED_REGISTERS had the right number of initializers. */
+ gcc_assert (sizeof fixed_regs == sizeof saved_fixed_regs);
+ gcc_assert (sizeof call_used_regs == sizeof saved_call_used_regs);
+ memcpy (saved_fixed_regs, fixed_regs, sizeof fixed_regs);
+ memcpy (saved_call_used_regs, call_used_regs, sizeof call_used_regs);
+
+ /* Likewise for call_really_used_regs. */
+#ifdef CALL_REALLY_USED_REGISTERS
+ gcc_assert (sizeof call_really_used_regs
+ == sizeof saved_call_really_used_regs);
+ memcpy (saved_call_really_used_regs, call_really_used_regs,
+ sizeof call_really_used_regs);
+#endif
+
+ /* And similarly for reg_names. */
+ gcc_assert (sizeof reg_names == sizeof saved_reg_names);
+ memcpy (saved_reg_names, reg_names, sizeof reg_names);
+}
+
+/* Restore the register information. */
+
+static void
+restore_register_info (void)
+{
+ memcpy (fixed_regs, saved_fixed_regs, sizeof fixed_regs);
+ memcpy (call_used_regs, saved_call_used_regs, sizeof call_used_regs);
+
+#ifdef CALL_REALLY_USED_REGISTERS
+ memcpy (call_really_used_regs, saved_call_really_used_regs,
+ sizeof call_really_used_regs);
+#endif
+
+ memcpy (reg_names, saved_reg_names, sizeof reg_names);
+}
+
/* After switches have been processed, which perhaps alter
`fixed_regs' and `call_used_regs', convert them to HARD_REG_SETs. */
unsigned int i, j;
unsigned int /* enum machine_mode */ m;
+ restore_register_info ();
+
+#ifdef REG_ALLOC_ORDER
+ for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
+ inv_reg_alloc_order[reg_alloc_order[i]] = i;
+#endif
+
/* This macro allows the fixed or call-used registers
and the register classes to depend on target flags. */
reg_class_subunion[I][J] gets the largest-numbered reg-class
that is contained in the union of classes I and J. */
+ memset (reg_class_subunion, 0, sizeof reg_class_subunion);
for (i = 0; i < N_REG_CLASSES; i++)
{
for (j = 0; j < N_REG_CLASSES; j++)
reg_class_superunion[I][J] gets the smallest-numbered reg-class
containing the union of classes I and J. */
+ memset (reg_class_superunion, 0, sizeof reg_class_superunion);
for (i = 0; i < N_REG_CLASSES; i++)
{
for (j = 0; j < N_REG_CLASSES; j++)
CLEAR_HARD_REG_SET (call_used_reg_set);
CLEAR_HARD_REG_SET (call_fixed_reg_set);
CLEAR_HARD_REG_SET (regs_invalidated_by_call);
+ CLEAR_HARD_REG_SET (losing_caller_save_reg_set);
memcpy (call_fixed_regs, fixed_regs, sizeof call_fixed_regs);
SET_HARD_REG_BIT (regs_invalidated_by_call, i);
}
+ /* Preserve global registers if called more than once. */
+ for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
+ {
+ if (global_regs[i])
+ {
+ fixed_regs[i] = call_used_regs[i] = call_fixed_regs[i] = 1;
+ SET_HARD_REG_BIT (fixed_reg_set, i);
+ SET_HARD_REG_BIT (call_used_reg_set, i);
+ SET_HARD_REG_BIT (call_fixed_reg_set, i);
+ }
+ }
+
memset (have_regs_of_mode, 0, sizeof (have_regs_of_mode));
memset (contains_reg_of_mode, 0, sizeof (contains_reg_of_mode));
for (m = 0; m < (unsigned int) MAX_MACHINE_MODE; m++)
have_regs_of_mode [m] = 1;
}
}
+
+ /* Reset move_cost and friends, making sure we only free shared
+ table entries once. */
+ for (i = 0; i < MAX_MACHINE_MODE; i++)
+ if (move_cost[i])
+ {
+ for (j = 0; j < i && move_cost[i] != move_cost[j]; j++)
+ ;
+ if (i == j)
+ {
+ free (move_cost[i]);
+ free (may_move_in_cost[i]);
+ free (may_move_out_cost[i]);
+ }
+ }
+ memset (move_cost, 0, sizeof move_cost);
+ memset (may_move_in_cost, 0, sizeof may_move_in_cost);
+ memset (may_move_out_cost, 0, sizeof may_move_out_cost);
+ last_mode_for_init_move_cost = -1;
}
/* Compute the table of register modes.
These values are used to record death information for individual registers
- (as opposed to a multi-register mode). */
+ (as opposed to a multi-register mode).
+ This function might be invoked more than once, if the target has support
+ for changing register usage conventions on a per-function basis.
+*/
void
-init_reg_modes_once (void)
+init_reg_modes_target (void)
{
int i, j;
}
}
-/* Finish initializing the register sets and
- initialize the register modes. */
+/* Finish initializing the register sets and initialize the register modes.
+ This function might be invoked more than once, if the target has support
+ for changing register usage conventions on a per-function basis.
+*/
void
init_regs (void)
return 1;
}
-struct tree_opt_pass pass_regclass_init =
+struct rtl_opt_pass pass_regclass_init =
{
+ {
+ RTL_PASS,
"regclass", /* name */
NULL, /* gate */
regclass_init, /* execute */
0, /* properties_provided */
0, /* properties_destroyed */
0, /* todo_flags_start */
- 0, /* todo_flags_finish */
- 'k' /* letter */
+ 0 /* todo_flags_finish */
+ }
};
record_address_regs (GET_MODE (recog_data.operand[i]),
XEXP (recog_data.operand[i], 0),
0, MEM, SCRATCH, frequency * 2);
- else if (constraints[i][0] == 'p'
- || EXTRA_ADDRESS_CONSTRAINT (constraints[i][0], constraints[i]))
+ else if (recog_data.alternative_enabled_p[0]
+ && (constraints[i][0] == 'p'
+ || EXTRA_ADDRESS_CONSTRAINT (constraints[i][0], constraints[i])))
record_address_regs (VOIDmode, recog_data.operand[i], 0, ADDRESS,
SCRATCH, frequency * 2);
}
#ifdef FORBIDDEN_INC_DEC_CLASSES
int i;
+ memset (forbidden_inc_dec_class, 0, sizeof forbidden_inc_dec_class);
for (i = 0; i < N_REG_CLASSES; i++)
{
rtx r = gen_rtx_raw_REG (VOIDmode, 0);
requires secondary reloads, disallow its class from
being used in such addresses. */
- if ((secondary_reload_class (1, base_class, m, r)
+ if ((secondary_reload_class (0, base_class, m, r)
|| secondary_reload_class (1, base_class, m, r))
&& ! auto_inc_dec_reg_p (r, m))
forbidden_inc_dec_class[i] = 1;
[(int) base_reg_class (VOIDmode, ADDRESS, SCRATCH)];
break;
- case 'm': case 'o': case 'V':
+ case TARGET_MEM_CONSTRAINT: case 'o': case 'V':
/* It doesn't seem worth distinguishing between offsettable
and non-offsettable addresses here. */
allows_mem[i] = 1;
if (alt_fail)
continue;
+ if (!recog_data.alternative_enabled_p[alt])
+ continue;
+
/* Finally, update the costs with the information we've calculated
about this alternative. */
We should only record information for REGs with numbers
greater than or equal to MIN_REGNO. */
-extern struct tree_opt_pass *current_pass;
-
static void
reg_scan_mark_refs (rtx x, rtx insn)
{
case CONST:
case CONST_INT:
case CONST_DOUBLE:
+ case CONST_FIXED:
case CONST_VECTOR:
case CC0:
case PC:
|| (GET_CODE (src) == SUBREG && subreg_lowpart_p (src)))
src = XEXP (src, 0);
- if (REG_P (src))
- REG_ATTRS (dest) = REG_ATTRS (src);
- if (MEM_P (src))
- set_reg_attrs_from_mem (dest, src);
+ set_reg_attrs_from_value (dest, src);
}
/* ... fall through ... */
#endif
}
-struct tree_opt_pass pass_subregs_of_mode_init =
+struct rtl_opt_pass pass_subregs_of_mode_init =
{
+ {
+ RTL_PASS,
"subregs_of_mode_init", /* name */
gate_subregs_of_mode_init, /* gate */
init_subregs_of_mode, /* execute */
0, /* properties_provided */
0, /* properties_destroyed */
0, /* todo_flags_start */
- 0, /* todo_flags_finish */
- 0 /* letter */
+ 0 /* todo_flags_finish */
+ }
};
-struct tree_opt_pass pass_subregs_of_mode_finish =
+struct rtl_opt_pass pass_subregs_of_mode_finish =
{
+ {
+ RTL_PASS,
"subregs_of_mode_finish", /* name */
gate_subregs_of_mode_init, /* gate */
finish_subregs_of_mode, /* execute */
0, /* properties_provided */
0, /* properties_destroyed */
0, /* todo_flags_start */
- 0, /* todo_flags_finish */
- 0 /* letter */
+ 0 /* todo_flags_finish */
+ }
};
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