#include "flags.h"
#include "basic-block.h"
#include "regs.h"
+#include "addresses.h"
#include "function.h"
#include "insn-config.h"
#include "recog.h"
HARD_REG_SET call_fixed_reg_set;
-/* Number of non-fixed registers. */
-
-int n_non_fixed_regs;
-
/* Indexed by hard register number, contains 1 for registers
that are being used for global register decls.
These must be exempt from ordinary flow analysis
memcpy (call_fixed_regs, fixed_regs, sizeof call_fixed_regs);
- n_non_fixed_regs = 0;
-
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
{
/* call_used_regs must include fixed_regs. */
if (fixed_regs[i])
SET_HARD_REG_BIT (fixed_reg_set, i);
- else
- n_non_fixed_regs++;
if (call_used_regs[i])
SET_HARD_REG_BIT (call_used_reg_set, i);
#ifdef CALL_REALLY_USED_REGISTERS
call_really_used_regs[i] = 1;
#endif
- n_non_fixed_regs--;
SET_HARD_REG_BIT (fixed_reg_set, i);
SET_HARD_REG_BIT (call_used_reg_set, i);
/* Structure used to record preferences of given pseudo. */
struct reg_pref
{
- /* (enum reg_class) prefclass is the preferred class. */
+ /* (enum reg_class) prefclass is the preferred class. May be
+ NO_REGS if no class is better than memory. */
char prefclass;
/* altclass is a register class that we should use for allocating
struct reg_pref *);
static int copy_cost (rtx, enum machine_mode, enum reg_class, int,
secondary_reload_info *);
-static void record_address_regs (rtx, enum reg_class, int);
+static void record_address_regs (enum machine_mode, rtx, int, enum rtx_code,
+ enum rtx_code, int);
#ifdef FORBIDDEN_INC_DEC_CLASSES
static int auto_inc_dec_reg_p (rtx, enum machine_mode);
#endif
-static void reg_scan_mark_refs (rtx, rtx, int, unsigned int);
+static void reg_scan_mark_refs (rtx, rtx, int);
+
+/* Wrapper around REGNO_OK_FOR_INDEX_P, to allow pseudo registers. */
+
+static inline bool
+ok_for_index_p_nonstrict (rtx reg)
+{
+ unsigned regno = REGNO (reg);
+ return regno >= FIRST_PSEUDO_REGISTER || REGNO_OK_FOR_INDEX_P (regno);
+}
+
+/* A version of regno_ok_for_base_p for use during regclass, when all pseudos
+ should count as OK. Arguments as for regno_ok_for_base_p. */
+
+static inline bool
+ok_for_base_p_nonstrict (rtx reg, enum machine_mode mode,
+ enum rtx_code outer_code, enum rtx_code index_code)
+{
+ unsigned regno = REGNO (reg);
+ if (regno >= FIRST_PSEUDO_REGISTER)
+ return true;
+
+ return ok_for_base_p_1 (regno, mode, outer_code, index_code);
+}
/* Return the reg_class in which pseudo reg number REGNO is best allocated.
This function is sometimes called before the info has been computed.
recog_data.operand[i] = SUBREG_REG (recog_data.operand[i]);
if (MEM_P (recog_data.operand[i]))
- record_address_regs (XEXP (recog_data.operand[i], 0),
- MODE_BASE_REG_CLASS (modes[i]), frequency * 2);
+ 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]))
- record_address_regs (recog_data.operand[i],
- MODE_BASE_REG_CLASS (modes[i]), frequency * 2);
+ record_address_regs (VOIDmode, recog_data.operand[i], 0, ADDRESS,
+ SCRATCH, frequency * 2);
}
/* Check for commutative in a separate loop so everything will
-= (MEMORY_MOVE_COST (GET_MODE (SET_DEST (set)),
GENERAL_REGS, 1)
* frequency);
- record_address_regs (XEXP (SET_SRC (set), 0),
- MODE_BASE_REG_CLASS (VOIDmode), frequency * 2);
+ record_address_regs (GET_MODE (SET_SRC (set)), XEXP (SET_SRC (set), 0),
+ 0, MEM, SCRATCH, frequency * 2);
return insn;
}
m = (enum machine_mode) ((int) m + 1))
if (HARD_REGNO_MODE_OK (j, m))
{
- enum reg_class base_class = MODE_BASE_REG_CLASS (VOIDmode);
+ /* ??? There are two assumptions here; that the base class does not
+ depend on the exact outer code (POST_INC vs. PRE_INC etc.), and
+ that it does not depend on the machine mode of the memory
+ reference. */
+ enum reg_class base_class
+ = base_reg_class (VOIDmode, POST_INC, SCRATCH);
PUT_MODE (r, m);
This pass comes just before local register allocation. */
void
-regclass (rtx f, int nregs, FILE *dump)
+regclass (rtx f, int nregs)
{
rtx insn;
int i;
init_recog ();
- costs = xmalloc (nregs * sizeof (struct costs));
+ costs = XNEWVEC (struct costs, nregs);
#ifdef FORBIDDEN_INC_DEC_CLASSES
- in_inc_dec = xmalloc (nregs);
+ in_inc_dec = XNEWVEC (char, nregs);
#endif /* FORBIDDEN_INC_DEC_CLASSES */
{
basic_block bb;
- if (dump)
- fprintf (dump, "\n\nPass %i\n\n",pass);
+ if (dump_file)
+ fprintf (dump_file, "\n\nPass %i\n\n",pass);
/* Zero out our accumulation of the cost of each class for each reg. */
memset (costs, 0, nregs * sizeof (struct costs));
if (pass == 0)
reg_pref = reg_pref_buffer;
- if (dump)
+ if (dump_file)
{
- dump_regclass (dump);
- fprintf (dump,"\n");
+ dump_regclass (dump_file);
+ fprintf (dump_file,"\n");
}
for (i = FIRST_PSEUDO_REGISTER; i < nregs; i++)
{
best = reg_class_subunion[(int) best][class];
}
+ /* If no register class is better than memory, use memory. */
+ if (p->mem_cost < best_cost)
+ best = NO_REGS;
+
/* Record the alternate register class; i.e., a class for which
every register in it is better than using memory. If adding a
class would make a smaller class (i.e., no union of just those
should be provided as a register class. Don't do this if we
will be doing it again later. */
- if ((pass == 1 || dump) || ! flag_expensive_optimizations)
+ if ((pass == 1 || dump_file) || ! flag_expensive_optimizations)
for (class = 0; class < N_REG_CLASSES; class++)
if (p->cost[class] < p->mem_cost
&& (reg_class_size[(int) reg_class_subunion[(int) alt][class]]
if (alt == best)
alt = NO_REGS;
- if (dump
+ if (dump_file
&& (reg_pref[i].prefclass != (int) best
|| reg_pref[i].altclass != (int) alt))
{
- fprintf (dump, " Register %i", i);
+ fprintf (dump_file, " Register %i", i);
if (alt == ALL_REGS || best == ALL_REGS)
- fprintf (dump, " pref %s\n", reg_class_names[(int) best]);
+ fprintf (dump_file, " pref %s\n", reg_class_names[(int) best]);
else if (alt == NO_REGS)
- fprintf (dump, " pref %s or none\n", reg_class_names[(int) best]);
+ fprintf (dump_file, " pref %s or none\n", reg_class_names[(int) best]);
else
- fprintf (dump, " pref %s, else %s\n",
+ fprintf (dump_file, " pref %s, else %s\n",
reg_class_names[(int) best],
reg_class_names[(int) alt]);
}
to what we would add if this register were not in the
appropriate class. */
- if (reg_pref)
+ if (reg_pref && reg_pref[REGNO (op)].prefclass != NO_REGS)
alt_cost
+= (may_move_in_cost[mode]
[(unsigned char) reg_pref[REGNO (op)].prefclass]
address, i.e. BASE_REG_CLASS. */
classes[i]
= reg_class_subunion[(int) classes[i]]
- [(int) MODE_BASE_REG_CLASS (VOIDmode)];
+ [(int) base_reg_class (VOIDmode, ADDRESS, SCRATCH)];
break;
case 'm': case 'o': case 'V':
address, i.e. BASE_REG_CLASS. */
classes[i]
= reg_class_subunion[(int) classes[i]]
- [(int) MODE_BASE_REG_CLASS (VOIDmode)];
+ [(int) base_reg_class (VOIDmode, ADDRESS, SCRATCH)];
}
#endif
break;
to what we would add if this register were not in the
appropriate class. */
- if (reg_pref)
+ if (reg_pref && reg_pref[REGNO (op)].prefclass != NO_REGS)
alt_cost
+= (may_move_in_cost[mode]
[(unsigned char) reg_pref[REGNO (op)].prefclass]
int class;
unsigned int nr;
- if (regno >= FIRST_PSEUDO_REGISTER && reg_pref != 0)
+ if (regno >= FIRST_PSEUDO_REGISTER && reg_pref != 0
+ && reg_pref[regno].prefclass != NO_REGS)
{
enum reg_class pref = reg_pref[regno].prefclass;
/* Record the pseudo registers we must reload into hard registers
in a subexpression of a memory address, X.
- CLASS is the class that the register needs to be in and is either
- BASE_REG_CLASS or INDEX_REG_CLASS.
+ If CONTEXT is 0, we are looking at the base part of an address, otherwise we
+ are looking at the index part.
+
+ MODE is the mode of the memory reference; OUTER_CODE and INDEX_CODE
+ give the context that the rtx appears in. These three arguments are
+ passed down to base_reg_class.
SCALE is twice the amount to multiply the cost by (it is twice so we
can represent half-cost adjustments). */
static void
-record_address_regs (rtx x, enum reg_class class, int scale)
+record_address_regs (enum machine_mode mode, rtx x, int context,
+ enum rtx_code outer_code, enum rtx_code index_code,
+ int scale)
{
enum rtx_code code = GET_CODE (x);
+ enum reg_class class;
+
+ if (context == 1)
+ class = INDEX_REG_CLASS;
+ else
+ class = base_reg_class (mode, outer_code, index_code);
switch (code)
{
be in the first operand. */
if (MAX_REGS_PER_ADDRESS == 1)
- record_address_regs (arg0, class, scale);
+ record_address_regs (mode, arg0, 0, PLUS, code1, scale);
/* If index and base registers are the same on this machine, just
record registers in any non-constant operands. We assume here,
as well as in the tests below, that all addresses are in
canonical form. */
- else if (INDEX_REG_CLASS == MODE_BASE_REG_CLASS (VOIDmode))
+ else if (INDEX_REG_CLASS == base_reg_class (VOIDmode, PLUS, SCRATCH))
{
- record_address_regs (arg0, class, scale);
+ record_address_regs (mode, arg0, context, PLUS, code1, scale);
if (! CONSTANT_P (arg1))
- record_address_regs (arg1, class, scale);
+ record_address_regs (mode, arg1, context, PLUS, code0, scale);
}
/* If the second operand is a constant integer, it doesn't change
what class the first operand must be. */
else if (code1 == CONST_INT || code1 == CONST_DOUBLE)
- record_address_regs (arg0, class, scale);
+ record_address_regs (mode, arg0, context, PLUS, code1, scale);
/* If the second operand is a symbolic constant, the first operand
must be an index register. */
else if (code1 == SYMBOL_REF || code1 == CONST || code1 == LABEL_REF)
- record_address_regs (arg0, INDEX_REG_CLASS, scale);
+ record_address_regs (mode, arg0, 1, PLUS, code1, scale);
/* If both operands are registers but one is already a hard register
of index or reg-base class, give the other the class that the
else if (code0 == REG && code1 == REG
&& REGNO (arg0) < FIRST_PSEUDO_REGISTER
- && (REG_MODE_OK_FOR_REG_BASE_P (arg0, VOIDmode)
- || REG_OK_FOR_INDEX_P (arg0)))
- record_address_regs (arg1,
- REG_MODE_OK_FOR_REG_BASE_P (arg0, VOIDmode)
- ? INDEX_REG_CLASS
- : MODE_BASE_REG_REG_CLASS (VOIDmode),
- scale);
+ && (ok_for_base_p_nonstrict (arg0, mode, PLUS, REG)
+ || ok_for_index_p_nonstrict (arg0)))
+ record_address_regs (mode, arg1,
+ ok_for_base_p_nonstrict (arg0, mode, PLUS, REG)
+ ? 1 : 0,
+ PLUS, REG, scale);
else if (code0 == REG && code1 == REG
&& REGNO (arg1) < FIRST_PSEUDO_REGISTER
- && (REG_MODE_OK_FOR_REG_BASE_P (arg1, VOIDmode)
- || REG_OK_FOR_INDEX_P (arg1)))
- record_address_regs (arg0,
- REG_MODE_OK_FOR_REG_BASE_P (arg1, VOIDmode)
- ? INDEX_REG_CLASS
- : MODE_BASE_REG_REG_CLASS (VOIDmode),
- scale);
+ && (ok_for_base_p_nonstrict (arg1, mode, PLUS, REG)
+ || ok_for_index_p_nonstrict (arg1)))
+ record_address_regs (mode, arg0,
+ ok_for_base_p_nonstrict (arg1, mode, PLUS, REG)
+ ? 1 : 0,
+ PLUS, REG, scale);
/* If one operand is known to be a pointer, it must be the base
with the other operand the index. Likewise if the other operand
else if ((code0 == REG && REG_POINTER (arg0))
|| code1 == MULT)
{
- record_address_regs (arg0, MODE_BASE_REG_REG_CLASS (VOIDmode),
- scale);
- record_address_regs (arg1, INDEX_REG_CLASS, scale);
+ record_address_regs (mode, arg0, 0, PLUS, code1, scale);
+ record_address_regs (mode, arg1, 1, PLUS, code0, scale);
}
else if ((code1 == REG && REG_POINTER (arg1))
|| code0 == MULT)
{
- record_address_regs (arg0, INDEX_REG_CLASS, scale);
- record_address_regs (arg1, MODE_BASE_REG_REG_CLASS (VOIDmode),
- scale);
+ record_address_regs (mode, arg0, 1, PLUS, code1, scale);
+ record_address_regs (mode, arg1, 0, PLUS, code0, scale);
}
/* Otherwise, count equal chances that each might be a base
else
{
- record_address_regs (arg0, MODE_BASE_REG_REG_CLASS (VOIDmode),
- scale / 2);
- record_address_regs (arg0, INDEX_REG_CLASS, scale / 2);
- record_address_regs (arg1, MODE_BASE_REG_REG_CLASS (VOIDmode),
- scale / 2);
- record_address_regs (arg1, INDEX_REG_CLASS, scale / 2);
+ record_address_regs (mode, arg0, 0, PLUS, code1, scale / 2);
+ record_address_regs (mode, arg0, 1, PLUS, code1, scale / 2);
+ record_address_regs (mode, arg1, 0, PLUS, code0, scale / 2);
+ record_address_regs (mode, arg1, 1, PLUS, code0, scale / 2);
}
}
break;
if it ends up in the wrong place. */
case POST_MODIFY:
case PRE_MODIFY:
- record_address_regs (XEXP (x, 0), MODE_BASE_REG_CLASS (VOIDmode),
- 2 * scale);
+ record_address_regs (mode, XEXP (x, 0), 0, code,
+ GET_CODE (XEXP (XEXP (x, 1), 1)), 2 * scale);
if (REG_P (XEXP (XEXP (x, 1), 1)))
- record_address_regs (XEXP (XEXP (x, 1), 1),
- INDEX_REG_CLASS, 2 * scale);
+ record_address_regs (mode, XEXP (XEXP (x, 1), 1), 1, code, REG,
+ 2 * scale);
break;
case POST_INC:
in_inc_dec[REGNO (XEXP (x, 0))] = 1;
#endif
- record_address_regs (XEXP (x, 0), class, 2 * scale);
+ record_address_regs (mode, XEXP (x, 0), 0, code, SCRATCH, 2 * scale);
break;
case REG:
int i;
for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
if (fmt[i] == 'e')
- record_address_regs (XEXP (x, i), class, scale);
+ record_address_regs (mode, XEXP (x, i), context, code, SCRATCH,
+ scale);
}
}
}
if (!reg_n_info)
{
- VARRAY_REG_INIT (reg_n_info, regno_allocated, "reg_n_info");
+ reg_n_info = VEC_alloc (reg_info_p, heap, regno_allocated);
+ VEC_safe_grow (reg_info_p, heap, reg_n_info, regno_allocated);
+ memset (VEC_address (reg_info_p, reg_n_info), 0,
+ sizeof (reg_info_p) * regno_allocated);
renumber = xmalloc (size_renumber);
- reg_pref_buffer = xmalloc (regno_allocated
- * sizeof (struct reg_pref));
+ reg_pref_buffer = XNEWVEC (struct reg_pref, regno_allocated);
}
else
{
- VARRAY_GROW (reg_n_info, regno_allocated);
+ size_t old_length = VEC_length (reg_info_p, reg_n_info);
+ if (old_length < regno_allocated)
+ {
+ reg_info_p *addr;
+ VEC_safe_grow (reg_info_p, heap, reg_n_info, regno_allocated);
+ addr = VEC_address (reg_info_p, reg_n_info);
+ memset (&addr[old_length], 0,
+ sizeof (reg_info_p) * (regno_allocated - old_length));
+ }
+ else if (regno_allocated < old_length)
+ {
+ VEC_truncate (reg_info_p, reg_n_info, regno_allocated);
+ }
if (new_p) /* If we're zapping everything, no need to realloc. */
{
free ((char *) renumber);
free ((char *) reg_pref);
renumber = xmalloc (size_renumber);
- reg_pref_buffer = xmalloc (regno_allocated
- * sizeof (struct reg_pref));
+ reg_pref_buffer = XNEWVEC (struct reg_pref, regno_allocated);
}
else
{
renumber = xrealloc (renumber, size_renumber);
- reg_pref_buffer = xrealloc (reg_pref_buffer,
+ reg_pref_buffer = (struct reg_pref *) xrealloc (reg_pref_buffer,
regno_allocated
* sizeof (struct reg_pref));
}
for (i = min_index+local_min; i <= max; i++)
{
- VARRAY_REG (reg_n_info, i) = ®_data->data[i-min_index];
+ VEC_replace (reg_info_p, reg_n_info, i,
+ ®_data->data[i-min_index]);
REG_BASIC_BLOCK (i) = REG_BLOCK_UNKNOWN;
renumber[i] = -1;
reg_pref_buffer[i].prefclass = (char) NO_REGS;
struct reg_info_data *reg_data;
struct reg_info_data *reg_next;
- VARRAY_FREE (reg_n_info);
+ VEC_free (reg_info_p, heap, reg_n_info);
for (reg_data = reg_info_head; reg_data; reg_data = reg_next)
{
reg_next = reg_data->next;
if (GET_CODE (pat) == PARALLEL
&& XVECLEN (pat, 0) > max_parallel)
max_parallel = XVECLEN (pat, 0);
- reg_scan_mark_refs (pat, insn, 0, 0);
+ reg_scan_mark_refs (pat, insn, 0);
if (REG_NOTES (insn))
- reg_scan_mark_refs (REG_NOTES (insn), insn, 1, 0);
+ reg_scan_mark_refs (REG_NOTES (insn), insn, 1);
}
max_parallel += max_set_parallel;
timevar_pop (TV_REG_SCAN);
}
-/* Update 'regscan' information by looking at the insns
- from FIRST to LAST. Some new REGs have been created,
- and any REG with number greater than OLD_MAX_REGNO is
- such a REG. We only update information for those. */
-
-void
-reg_scan_update (rtx first, rtx last, unsigned int old_max_regno)
-{
- rtx insn;
-
- allocate_reg_info (max_reg_num (), FALSE, FALSE);
-
- for (insn = first; insn != last; insn = NEXT_INSN (insn))
- if (INSN_P (insn))
- {
- rtx pat = PATTERN (insn);
- if (GET_CODE (pat) == PARALLEL
- && XVECLEN (pat, 0) > max_parallel)
- max_parallel = XVECLEN (pat, 0);
- reg_scan_mark_refs (pat, insn, 0, old_max_regno);
-
- if (REG_NOTES (insn))
- reg_scan_mark_refs (REG_NOTES (insn), insn, 1, old_max_regno);
- }
-}
-
/* X is the expression to scan. INSN is the insn it appears in.
- NOTE_FLAG is nonzero if X is from INSN's notes rather than its body.
- We should only record information for REGs with numbers
- greater than or equal to MIN_REGNO. */
+ NOTE_FLAG is nonzero if X is from INSN's notes rather than its body. */
static void
-reg_scan_mark_refs (rtx x, rtx insn, int note_flag, unsigned int min_regno)
+reg_scan_mark_refs (rtx x, rtx insn, int note_flag)
{
enum rtx_code code;
rtx dest;
{
unsigned int regno = REGNO (x);
- if (regno >= min_regno)
- {
- if (!note_flag)
- REGNO_LAST_UID (regno) = INSN_UID (insn);
- if (REGNO_FIRST_UID (regno) == 0)
- REGNO_FIRST_UID (regno) = INSN_UID (insn);
- /* If we are called by reg_scan_update() (indicated by min_regno
- being set), we also need to update the reference count. */
- if (min_regno)
- REG_N_REFS (regno)++;
- }
+ if (!note_flag)
+ REGNO_LAST_UID (regno) = INSN_UID (insn);
+ if (REGNO_FIRST_UID (regno) == 0)
+ REGNO_FIRST_UID (regno) = INSN_UID (insn);
}
break;
case EXPR_LIST:
if (XEXP (x, 0))
- reg_scan_mark_refs (XEXP (x, 0), insn, note_flag, min_regno);
+ reg_scan_mark_refs (XEXP (x, 0), insn, note_flag);
if (XEXP (x, 1))
- reg_scan_mark_refs (XEXP (x, 1), insn, note_flag, min_regno);
+ reg_scan_mark_refs (XEXP (x, 1), insn, note_flag);
break;
case INSN_LIST:
if (XEXP (x, 1))
- reg_scan_mark_refs (XEXP (x, 1), insn, note_flag, min_regno);
+ reg_scan_mark_refs (XEXP (x, 1), insn, note_flag);
break;
case CLOBBER:
{
rtx reg = XEXP (x, 0);
- if (REG_P (reg)
- && REGNO (reg) >= min_regno)
+ if (REG_P (reg))
{
REG_N_SETS (REGNO (reg))++;
REG_N_REFS (REGNO (reg))++;
}
else if (MEM_P (reg))
- reg_scan_mark_refs (XEXP (reg, 0), insn, note_flag, min_regno);
+ reg_scan_mark_refs (XEXP (reg, 0), insn, note_flag);
}
break;
if (GET_CODE (dest) == PARALLEL)
max_set_parallel = MAX (max_set_parallel, XVECLEN (dest, 0) - 1);
- if (REG_P (dest)
- && REGNO (dest) >= min_regno)
+ if (REG_P (dest))
{
REG_N_SETS (REGNO (dest))++;
REG_N_REFS (REGNO (dest))++;
if (REG_P (SET_DEST (x))
&& REGNO (SET_DEST (x)) >= FIRST_PSEUDO_REGISTER
- && REGNO (SET_DEST (x)) >= min_regno
/* If the destination pseudo is set more than once, then other
sets might not be to a pointer value (consider access to a
union in two threads of control in the presence of global
for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
{
if (fmt[i] == 'e')
- reg_scan_mark_refs (XEXP (x, i), insn, note_flag, min_regno);
+ reg_scan_mark_refs (XEXP (x, i), insn, note_flag);
else if (fmt[i] == 'E' && XVEC (x, i) != 0)
{
int j;
for (j = XVECLEN (x, i) - 1; j >= 0; j--)
- reg_scan_mark_refs (XVECEXP (x, i, j), insn, note_flag, min_regno);
+ reg_scan_mark_refs (XVECEXP (x, i, j), insn, note_flag);
}
}
}
node = *slot;
if (node == NULL)
{
- node = xcalloc (1, sizeof (*node));
+ node = XCNEW (struct subregs_of_mode_node);
node->block = regno & -8;
*slot = node;
}
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