/* Reload pseudo regs into hard regs for insns that require hard regs.
Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
+ 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
Free Software Foundation, Inc.
This file is part of GCC.
which might still contain registers that have not
actually been allocated since they have an
equivalence. */
- gcc_assert ((flag_ira && optimize) || reload_completed);
+ gcc_assert (ira_conflicts_p || reload_completed);
}
else
add_to_hard_reg_set (to, PSEUDO_REGNO_MODE (regno), r);
for (n = 0, i = LAST_VIRTUAL_REGISTER + 1; i < max_regno; i++)
temp_pseudo_reg_arr[n++] = i;
- if (flag_ira && optimize)
+ if (ira_conflicts_p)
/* Ask IRA to order pseudo-registers for better stack slot
sharing. */
ira_sort_regnos_for_alter_reg (temp_pseudo_reg_arr, n, reg_max_ref_width);
calculate_needs_all_insns (global);
- if (! flag_ira || ! optimize)
+ if (! ira_conflicts_p)
/* Don't do it for IRA. We need this info because we don't
change live_throughout and dead_or_set for chains when IRA
is used. */
reg_equiv_memory_loc
[REGNO (SET_DEST (set))]))))
{
- if (flag_ira && optimize)
+ if (ira_conflicts_p)
/* Inform IRA about the insn deletion. */
ira_mark_memory_move_deletion (REGNO (SET_DEST (set)),
REGNO (SET_SRC (set)));
|| REGNO_REG_SET_P (&spilled_pseudos, reg)
/* Ignore spilled pseudo-registers which can be here only if IRA
is used. */
- || (flag_ira && optimize && r < 0))
+ || (ira_conflicts_p && r < 0))
return;
SET_REGNO_REG_SET (&pseudos_counted, reg);
/* Ignore spilled pseudo-registers which can be here only if IRA is
used. */
- if ((flag_ira && optimize && r < 0)
+ if ((ira_conflicts_p && r < 0)
|| REGNO_REG_SET_P (&spilled_pseudos, reg)
|| spilled + spilled_nregs <= r || r + nregs <= spilled)
return;
if (! ok)
continue;
- if (flag_ira && optimize)
+ if (ira_conflicts_p)
{
/* Ask IRA to find a better pseudo-register for
spilling. */
unsigned int min_align = reg_max_ref_width[i] * BITS_PER_UNIT;
int adjust = 0;
- if (flag_ira && optimize)
+ if (ira_conflicts_p)
{
/* Mark the spill for IRA. */
SET_REGNO_REG_SET (&spilled_pseudos, i);
enough inherent space and enough total space.
Otherwise, we allocate a new slot, making sure that it has no less
inherent space, and no less total space, then the previous slot. */
- else if (from_reg == -1 || (!dont_share_p && flag_ira && optimize))
+ else if (from_reg == -1 || (!dont_share_p && ira_conflicts_p))
{
rtx stack_slot;
adjust);
}
- if (! dont_share_p && flag_ira && optimize)
+ if (! dont_share_p && ira_conflicts_p)
/* Inform IRA about allocation a new stack slot. */
ira_mark_new_stack_slot (stack_slot, i, total_size);
}
spill_reg_order[i] = -1;
EXECUTE_IF_SET_IN_REG_SET (&spilled_pseudos, FIRST_PSEUDO_REGISTER, i, rsi)
- if (! flag_ira || ! optimize || reg_renumber[i] >= 0)
+ if (! ira_conflicts_p || reg_renumber[i] >= 0)
{
/* Record the current hard register the pseudo is allocated to
in pseudo_previous_regs so we avoid reallocating it to the
SET_HARD_REG_BIT (pseudo_previous_regs[i], reg_renumber[i]);
/* Mark it as no longer having a hard register home. */
reg_renumber[i] = -1;
- if (flag_ira && optimize)
+ if (ira_conflicts_p)
/* Inform IRA about the change. */
ira_mark_allocation_change (i);
/* We will need to scan everything again. */
}
/* Retry global register allocation if possible. */
- if (global)
+ if (global && ira_conflicts_p)
{
+ unsigned int n;
+
memset (pseudo_forbidden_regs, 0, max_regno * sizeof (HARD_REG_SET));
/* For every insn that needs reloads, set the registers used as spill
regs in pseudo_forbidden_regs for every pseudo live across the
}
}
- if (! flag_ira || ! optimize)
- {
- /* Retry allocating the spilled pseudos. For each reg,
- merge the various reg sets that indicate which hard regs
- can't be used, and call retry_global_alloc. We change
- spill_pseudos here to only contain pseudos that did not
- get a new hard register. */
- for (i = FIRST_PSEUDO_REGISTER; i < (unsigned)max_regno; i++)
- if (reg_old_renumber[i] != reg_renumber[i])
- {
- HARD_REG_SET forbidden;
-
- COPY_HARD_REG_SET (forbidden, bad_spill_regs_global);
- IOR_HARD_REG_SET (forbidden, pseudo_forbidden_regs[i]);
- IOR_HARD_REG_SET (forbidden, pseudo_previous_regs[i]);
- retry_global_alloc (i, forbidden);
- if (reg_renumber[i] >= 0)
- CLEAR_REGNO_REG_SET (&spilled_pseudos, i);
- }
- }
- else
- {
- /* Retry allocating the pseudos spilled in IRA and the
- reload. For each reg, merge the various reg sets that
- indicate which hard regs can't be used, and call
- ira_reassign_pseudos. */
- unsigned int n;
-
- for (n = 0, i = FIRST_PSEUDO_REGISTER; i < (unsigned) max_regno; i++)
- if (reg_old_renumber[i] != reg_renumber[i])
- {
- if (reg_renumber[i] < 0)
- temp_pseudo_reg_arr[n++] = i;
- else
- CLEAR_REGNO_REG_SET (&spilled_pseudos, i);
- }
- if (ira_reassign_pseudos (temp_pseudo_reg_arr, n,
- bad_spill_regs_global,
- pseudo_forbidden_regs, pseudo_previous_regs,
- &spilled_pseudos))
- something_changed = 1;
-
- }
+ /* Retry allocating the pseudos spilled in IRA and the
+ reload. For each reg, merge the various reg sets that
+ indicate which hard regs can't be used, and call
+ ira_reassign_pseudos. */
+ for (n = 0, i = FIRST_PSEUDO_REGISTER; i < (unsigned) max_regno; i++)
+ if (reg_old_renumber[i] != reg_renumber[i])
+ {
+ if (reg_renumber[i] < 0)
+ temp_pseudo_reg_arr[n++] = i;
+ else
+ CLEAR_REGNO_REG_SET (&spilled_pseudos, i);
+ }
+ if (ira_reassign_pseudos (temp_pseudo_reg_arr, n,
+ bad_spill_regs_global,
+ pseudo_forbidden_regs, pseudo_previous_regs,
+ &spilled_pseudos))
+ something_changed = 1;
}
/* Fix up the register information in the insn chain.
This involves deleting those of the spilled pseudos which did not get
HARD_REG_SET used_by_pseudos;
HARD_REG_SET used_by_pseudos2;
- if (! flag_ira || ! optimize)
+ if (! ira_conflicts_p)
{
/* Don't do it for IRA because IRA and the reload still can
assign hard registers to the spilled pseudos on next
&& REG_N_SETS (REGNO (old)) == 1)
{
reg_renumber[REGNO (old)] = REGNO (reloadreg);
- if (flag_ira && optimize)
+ if (ira_conflicts_p)
/* Inform IRA about the change. */
ira_mark_allocation_change (REGNO (old));
alter_reg (REGNO (old), -1, false);
/* For the debugging info, say the pseudo lives in this reload reg. */
reg_renumber[REGNO (reg)] = REGNO (new_reload_reg);
- if (flag_ira && optimize)
+ if (ira_conflicts_p)
/* Inform IRA about the change. */
ira_mark_allocation_change (REGNO (reg));
alter_reg (REGNO (reg), -1, false);
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