/* Search an insn for pseudo regs that must be in hard regs and are not.
Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
+ 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 Free Software Foundation,
+ Inc.
This file is part of GCC.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING. If not, write to the Free
-Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA. */
+Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301, USA. */
/* This file contains subroutines used only from the file reload1.c.
It knows how to scan one insn for operands and values
ought to be used instead.
Before processing the first insn of the function, call `init_reload'.
+ init_reload actually has to be called earlier anyway.
To scan an insn, call `find_reloads'. This does two things:
1. sets up tables describing which values must be reloaded
#include "recog.h"
#include "reload.h"
#include "regs.h"
+#include "addresses.h"
#include "hard-reg-set.h"
#include "flags.h"
#include "real.h"
#include "output.h"
#include "function.h"
#include "toplev.h"
+#include "params.h"
+#include "target.h"
-#ifndef REGISTER_MOVE_COST
-#define REGISTER_MOVE_COST(m, x, y) 2
-#endif
+/* True if X is a constant that can be forced into the constant pool. */
+#define CONST_POOL_OK_P(X) \
+ (CONSTANT_P (X) \
+ && GET_CODE (X) != HIGH \
+ && !targetm.cannot_force_const_mem (X))
-#ifndef REGNO_MODE_OK_FOR_BASE_P
-#define REGNO_MODE_OK_FOR_BASE_P(REGNO, MODE) REGNO_OK_FOR_BASE_P (REGNO)
-#endif
+/* True if C is a non-empty register class that has too few registers
+ to be safely used as a reload target class. */
+#define SMALL_REGISTER_CLASS_P(C) \
+ (reg_class_size [(C)] == 1 \
+ || (reg_class_size [(C)] >= 1 && CLASS_LIKELY_SPILLED_P (C)))
-#ifndef REG_MODE_OK_FOR_BASE_P
-#define REG_MODE_OK_FOR_BASE_P(REGNO, MODE) REG_OK_FOR_BASE_P (REGNO)
-#endif
\f
/* All reloads of the current insn are recorded here. See reload.h for
comments. */
static rtx secondary_memlocs[NUM_MACHINE_MODES];
static rtx secondary_memlocs_elim[NUM_MACHINE_MODES][MAX_RECOG_OPERANDS];
+static int secondary_memlocs_elim_used = 0;
#endif
/* The instruction we are doing reloads for;
/* Compare two RTX's. */
#define MATCHES(x, y) \
- (x == y || (x != 0 && (GET_CODE (x) == REG \
- ? GET_CODE (y) == REG && REGNO (x) == REGNO (y) \
+ (x == y || (x != 0 && (REG_P (x) \
+ ? REG_P (y) && REGNO (x) == REGNO (y) \
: rtx_equal_p (x, y) && ! side_effects_p (x))))
/* Indicates if two reloads purposes are for similar enough things that we
? RELOAD_FOR_OUTADDR_ADDRESS \
: (type)))
-#ifdef HAVE_SECONDARY_RELOADS
-static int push_secondary_reload PARAMS ((int, rtx, int, int, enum reg_class,
- enum machine_mode, enum reload_type,
- enum insn_code *));
-#endif
-static enum reg_class find_valid_class PARAMS ((enum machine_mode, int,
- unsigned int));
-static int reload_inner_reg_of_subreg PARAMS ((rtx, enum machine_mode, int));
-static void push_replacement PARAMS ((rtx *, int, enum machine_mode));
-static void dup_replacements PARAMS ((rtx *, rtx *));
-static void combine_reloads PARAMS ((void));
-static int find_reusable_reload PARAMS ((rtx *, rtx, enum reg_class,
- enum reload_type, int, int));
-static rtx find_dummy_reload PARAMS ((rtx, rtx, rtx *, rtx *,
- enum machine_mode, enum machine_mode,
- enum reg_class, int, int));
-static int hard_reg_set_here_p PARAMS ((unsigned int, unsigned int, rtx));
-static struct decomposition decompose PARAMS ((rtx));
-static int immune_p PARAMS ((rtx, rtx, struct decomposition));
-static int alternative_allows_memconst PARAMS ((const char *, int));
-static rtx find_reloads_toplev PARAMS ((rtx, int, enum reload_type, int,
- int, rtx, int *));
-static rtx make_memloc PARAMS ((rtx, int));
-static int maybe_memory_address_p PARAMS ((enum machine_mode, rtx, rtx *));
-static int find_reloads_address PARAMS ((enum machine_mode, rtx *, rtx, rtx *,
- int, enum reload_type, int, rtx));
-static rtx subst_reg_equivs PARAMS ((rtx, rtx));
-static rtx subst_indexed_address PARAMS ((rtx));
-static void update_auto_inc_notes PARAMS ((rtx, int, int));
-static int find_reloads_address_1 PARAMS ((enum machine_mode, rtx, int, rtx *,
- int, enum reload_type,int, rtx));
-static void find_reloads_address_part PARAMS ((rtx, rtx *, enum reg_class,
- enum machine_mode, int,
- enum reload_type, int));
-static rtx find_reloads_subreg_address PARAMS ((rtx, int, int,
- enum reload_type, int, rtx));
-static void copy_replacements_1 PARAMS ((rtx *, rtx *, int));
-static int find_inc_amount PARAMS ((rtx, rtx));
-\f
-#ifdef HAVE_SECONDARY_RELOADS
+static int push_secondary_reload (int, rtx, int, int, enum reg_class,
+ enum machine_mode, enum reload_type,
+ enum insn_code *, secondary_reload_info *);
+static enum reg_class find_valid_class (enum machine_mode, enum machine_mode,
+ int, unsigned int);
+static int reload_inner_reg_of_subreg (rtx, enum machine_mode, int);
+static void push_replacement (rtx *, int, enum machine_mode);
+static void dup_replacements (rtx *, rtx *);
+static void combine_reloads (void);
+static int find_reusable_reload (rtx *, rtx, enum reg_class,
+ enum reload_type, int, int);
+static rtx find_dummy_reload (rtx, rtx, rtx *, rtx *, enum machine_mode,
+ enum machine_mode, enum reg_class, int, int);
+static int hard_reg_set_here_p (unsigned int, unsigned int, rtx);
+static struct decomposition decompose (rtx);
+static int immune_p (rtx, rtx, struct decomposition);
+static int alternative_allows_memconst (const char *, int);
+static rtx find_reloads_toplev (rtx, int, enum reload_type, int, int, rtx,
+ int *);
+static rtx make_memloc (rtx, int);
+static int maybe_memory_address_p (enum machine_mode, rtx, rtx *);
+static int find_reloads_address (enum machine_mode, rtx *, rtx, rtx *,
+ int, enum reload_type, int, rtx);
+static rtx subst_reg_equivs (rtx, rtx);
+static rtx subst_indexed_address (rtx);
+static void update_auto_inc_notes (rtx, int, int);
+static int find_reloads_address_1 (enum machine_mode, rtx, int,
+ enum rtx_code, enum rtx_code, rtx *,
+ int, enum reload_type,int, rtx);
+static void find_reloads_address_part (rtx, rtx *, enum reg_class,
+ enum machine_mode, int,
+ enum reload_type, int);
+static rtx find_reloads_subreg_address (rtx, int, int, enum reload_type,
+ int, rtx);
+static void copy_replacements_1 (rtx *, rtx *, int);
+static int find_inc_amount (rtx, rtx);
+static int refers_to_mem_for_reload_p (rtx);
+static int refers_to_regno_for_reload_p (unsigned int, unsigned int,
+ rtx, rtx *);
+
+/* Add NEW to reg_equiv_alt_mem_list[REGNO] if it's not present in the
+ list yet. */
+static void
+push_reg_equiv_alt_mem (int regno, rtx mem)
+{
+ rtx it;
+
+ for (it = reg_equiv_alt_mem_list [regno]; it; it = XEXP (it, 1))
+ if (rtx_equal_p (XEXP (it, 0), mem))
+ return;
+
+ reg_equiv_alt_mem_list [regno]
+ = alloc_EXPR_LIST (REG_EQUIV, mem,
+ reg_equiv_alt_mem_list [regno]);
+}
+\f
/* Determine if any secondary reloads are needed for loading (if IN_P is
nonzero) or storing (if IN_P is zero) X to or from a reload register of
register class RELOAD_CLASS in mode RELOAD_MODE. If secondary reloads
need a secondary reload. */
static int
-push_secondary_reload (in_p, x, opnum, optional, reload_class, reload_mode,
- type, picode)
- int in_p;
- rtx x;
- int opnum;
- int optional;
- enum reg_class reload_class;
- enum machine_mode reload_mode;
- enum reload_type type;
- enum insn_code *picode;
+push_secondary_reload (int in_p, rtx x, int opnum, int optional,
+ enum reg_class reload_class,
+ enum machine_mode reload_mode, enum reload_type type,
+ enum insn_code *picode, secondary_reload_info *prev_sri)
{
enum reg_class class = NO_REGS;
+ enum reg_class scratch_class;
enum machine_mode mode = reload_mode;
enum insn_code icode = CODE_FOR_nothing;
- enum reg_class t_class = NO_REGS;
- enum machine_mode t_mode = VOIDmode;
enum insn_code t_icode = CODE_FOR_nothing;
enum reload_type secondary_type;
int s_reload, t_reload = -1;
+ const char *scratch_constraint;
+ char letter;
+ secondary_reload_info sri;
if (type == RELOAD_FOR_INPUT_ADDRESS
|| type == RELOAD_FOR_OUTPUT_ADDRESS
a secondary reload is needed since whether or not a reload is needed
might be sensitive to the form of the MEM. */
- if (GET_CODE (x) == REG && REGNO (x) >= FIRST_PSEUDO_REGISTER
+ if (REG_P (x) && REGNO (x) >= FIRST_PSEUDO_REGISTER
&& reg_equiv_mem[REGNO (x)] != 0)
x = reg_equiv_mem[REGNO (x)];
-#ifdef SECONDARY_INPUT_RELOAD_CLASS
- if (in_p)
- class = SECONDARY_INPUT_RELOAD_CLASS (reload_class, reload_mode, x);
-#endif
-
-#ifdef SECONDARY_OUTPUT_RELOAD_CLASS
- if (! in_p)
- class = SECONDARY_OUTPUT_RELOAD_CLASS (reload_class, reload_mode, x);
-#endif
+ sri.icode = CODE_FOR_nothing;
+ sri.prev_sri = prev_sri;
+ class = targetm.secondary_reload (in_p, x, reload_class, reload_mode, &sri);
+ icode = sri.icode;
/* If we don't need any secondary registers, done. */
- if (class == NO_REGS)
+ if (class == NO_REGS && icode == CODE_FOR_nothing)
return -1;
- /* Get a possible insn to use. If the predicate doesn't accept X, don't
- use the insn. */
-
- icode = (in_p ? reload_in_optab[(int) reload_mode]
- : reload_out_optab[(int) reload_mode]);
-
- if (icode != CODE_FOR_nothing
- && insn_data[(int) icode].operand[in_p].predicate
- && (! (insn_data[(int) icode].operand[in_p].predicate) (x, reload_mode)))
- icode = CODE_FOR_nothing;
+ if (class != NO_REGS)
+ t_reload = push_secondary_reload (in_p, x, opnum, optional, class,
+ reload_mode, type, &t_icode, &sri);
- /* If we will be using an insn, see if it can directly handle the reload
- register we will be using. If it can, the secondary reload is for a
- scratch register. If it can't, we will use the secondary reload for
- an intermediate register and require a tertiary reload for the scratch
- register. */
+ /* If we will be using an insn, the secondary reload is for a
+ scratch register. */
if (icode != CODE_FOR_nothing)
{
in operand 1. Outputs should have an initial "=", which we must
skip. */
- enum reg_class insn_class;
-
- if (insn_data[(int) icode].operand[!in_p].constraint[0] == 0)
- insn_class = ALL_REGS;
- else
- {
- const char *insn_constraint
- = &insn_data[(int) icode].operand[!in_p].constraint[in_p];
- char insn_letter = *insn_constraint;
- insn_class
- = (insn_letter == 'r' ? GENERAL_REGS
- : REG_CLASS_FROM_CONSTRAINT ((unsigned char) insn_letter,
- insn_constraint));
-
- if (insn_class == NO_REGS)
- abort ();
- if (in_p
- && insn_data[(int) icode].operand[!in_p].constraint[0] != '=')
- abort ();
- }
-
- /* The scratch register's constraint must start with "=&". */
- if (insn_data[(int) icode].operand[2].constraint[0] != '='
- || insn_data[(int) icode].operand[2].constraint[1] != '&')
- abort ();
-
- if (reg_class_subset_p (reload_class, insn_class))
- mode = insn_data[(int) icode].operand[2].mode;
- else
- {
- const char *t_constraint
- = &insn_data[(int) icode].operand[2].constraint[2];
- char t_letter = *t_constraint;
- class = insn_class;
- t_mode = insn_data[(int) icode].operand[2].mode;
- t_class = (t_letter == 'r' ? GENERAL_REGS
- : REG_CLASS_FROM_CONSTRAINT ((unsigned char) t_letter,
- t_constraint));
- t_icode = icode;
- icode = CODE_FOR_nothing;
- }
+ /* ??? It would be useful to be able to handle only two, or more than
+ three, operands, but for now we can only handle the case of having
+ exactly three: output, input and one temp/scratch. */
+ gcc_assert (insn_data[(int) icode].n_operands == 3);
+
+ /* ??? We currently have no way to represent a reload that needs
+ an icode to reload from an intermediate tertiary reload register.
+ We should probably have a new field in struct reload to tag a
+ chain of scratch operand reloads onto. */
+ gcc_assert (class == NO_REGS);
+
+ scratch_constraint = insn_data[(int) icode].operand[2].constraint;
+ gcc_assert (*scratch_constraint == '=');
+ scratch_constraint++;
+ if (*scratch_constraint == '&')
+ scratch_constraint++;
+ letter = *scratch_constraint;
+ scratch_class = (letter == 'r' ? GENERAL_REGS
+ : REG_CLASS_FROM_CONSTRAINT ((unsigned char) letter,
+ scratch_constraint));
+
+ class = scratch_class;
+ mode = insn_data[(int) icode].operand[2].mode;
}
/* This case isn't valid, so fail. Reload is allowed to use the same
Allow this when a reload_in/out pattern is being used. I.e. assume
that the generated code handles this case. */
- if (in_p && class == reload_class && icode == CODE_FOR_nothing
- && t_icode == CODE_FOR_nothing)
- abort ();
-
- /* If we need a tertiary reload, see if we have one we can reuse or else
- make a new one. */
-
- if (t_class != NO_REGS)
- {
- for (t_reload = 0; t_reload < n_reloads; t_reload++)
- if (rld[t_reload].secondary_p
- && (reg_class_subset_p (t_class, rld[t_reload].class)
- || reg_class_subset_p (rld[t_reload].class, t_class))
- && ((in_p && rld[t_reload].inmode == t_mode)
- || (! in_p && rld[t_reload].outmode == t_mode))
- && ((in_p && (rld[t_reload].secondary_in_icode
- == CODE_FOR_nothing))
- || (! in_p &&(rld[t_reload].secondary_out_icode
- == CODE_FOR_nothing)))
- && (reg_class_size[(int) t_class] == 1 || SMALL_REGISTER_CLASSES)
- && MERGABLE_RELOADS (secondary_type,
- rld[t_reload].when_needed,
- opnum, rld[t_reload].opnum))
- {
- if (in_p)
- rld[t_reload].inmode = t_mode;
- if (! in_p)
- rld[t_reload].outmode = t_mode;
-
- if (reg_class_subset_p (t_class, rld[t_reload].class))
- rld[t_reload].class = t_class;
-
- rld[t_reload].opnum = MIN (rld[t_reload].opnum, opnum);
- rld[t_reload].optional &= optional;
- rld[t_reload].secondary_p = 1;
- if (MERGE_TO_OTHER (secondary_type, rld[t_reload].when_needed,
- opnum, rld[t_reload].opnum))
- rld[t_reload].when_needed = RELOAD_OTHER;
- }
-
- if (t_reload == n_reloads)
- {
- /* We need to make a new tertiary reload for this register class. */
- rld[t_reload].in = rld[t_reload].out = 0;
- rld[t_reload].class = t_class;
- rld[t_reload].inmode = in_p ? t_mode : VOIDmode;
- rld[t_reload].outmode = ! in_p ? t_mode : VOIDmode;
- rld[t_reload].reg_rtx = 0;
- rld[t_reload].optional = optional;
- rld[t_reload].inc = 0;
- /* Maybe we could combine these, but it seems too tricky. */
- rld[t_reload].nocombine = 1;
- rld[t_reload].in_reg = 0;
- rld[t_reload].out_reg = 0;
- rld[t_reload].opnum = opnum;
- rld[t_reload].when_needed = secondary_type;
- rld[t_reload].secondary_in_reload = -1;
- rld[t_reload].secondary_out_reload = -1;
- rld[t_reload].secondary_in_icode = CODE_FOR_nothing;
- rld[t_reload].secondary_out_icode = CODE_FOR_nothing;
- rld[t_reload].secondary_p = 1;
-
- n_reloads++;
- }
- }
+ gcc_assert (!in_p || class != reload_class || icode != CODE_FOR_nothing
+ || t_icode != CODE_FOR_nothing);
/* See if we can reuse an existing secondary reload. */
for (s_reload = 0; s_reload < n_reloads; s_reload++)
|| (! in_p && rld[s_reload].secondary_out_reload == t_reload))
&& ((in_p && rld[s_reload].secondary_in_icode == t_icode)
|| (! in_p && rld[s_reload].secondary_out_icode == t_icode))
- && (reg_class_size[(int) class] == 1 || SMALL_REGISTER_CLASSES)
+ && (SMALL_REGISTER_CLASS_P (class) || SMALL_REGISTER_CLASSES)
&& MERGABLE_RELOADS (secondary_type, rld[s_reload].when_needed,
opnum, rld[s_reload].opnum))
{
*picode = icode;
return s_reload;
}
-#endif /* HAVE_SECONDARY_RELOADS */
+
+/* If a secondary reload is needed, return its class. If both an intermediate
+ register and a scratch register is needed, we return the class of the
+ intermediate register. */
+enum reg_class
+secondary_reload_class (bool in_p, enum reg_class class,
+ enum machine_mode mode, rtx x)
+{
+ enum insn_code icode;
+ secondary_reload_info sri;
+
+ sri.icode = CODE_FOR_nothing;
+ sri.prev_sri = NULL;
+ class = targetm.secondary_reload (in_p, x, class, mode, &sri);
+ icode = sri.icode;
+
+ /* If there are no secondary reloads at all, we return NO_REGS.
+ If an intermediate register is needed, we return its class. */
+ if (icode == CODE_FOR_nothing || class != NO_REGS)
+ return class;
+
+ /* No intermediate register is needed, but we have a special reload
+ pattern, which we assume for now needs a scratch register. */
+ return scratch_reload_class (icode);
+}
+
+/* ICODE is the insn_code of a reload pattern. Check that it has exactly
+ three operands, verify that operand 2 is an output operand, and return
+ its register class.
+ ??? We'd like to be able to handle any pattern with at least 2 operands,
+ for zero or more scratch registers, but that needs more infrastructure. */
+enum reg_class
+scratch_reload_class (enum insn_code icode)
+{
+ const char *scratch_constraint;
+ char scratch_letter;
+ enum reg_class class;
+
+ gcc_assert (insn_data[(int) icode].n_operands == 3);
+ scratch_constraint = insn_data[(int) icode].operand[2].constraint;
+ gcc_assert (*scratch_constraint == '=');
+ scratch_constraint++;
+ if (*scratch_constraint == '&')
+ scratch_constraint++;
+ scratch_letter = *scratch_constraint;
+ if (scratch_letter == 'r')
+ return GENERAL_REGS;
+ class = REG_CLASS_FROM_CONSTRAINT ((unsigned char) scratch_letter,
+ scratch_constraint);
+ gcc_assert (class != NO_REGS);
+ return class;
+}
\f
#ifdef SECONDARY_MEMORY_NEEDED
call find_reloads_address on the location being returned. */
rtx
-get_secondary_mem (x, mode, opnum, type)
- rtx x ATTRIBUTE_UNUSED;
- enum machine_mode mode;
- int opnum;
- enum reload_type type;
+get_secondary_mem (rtx x ATTRIBUTE_UNUSED, enum machine_mode mode,
+ int opnum, enum reload_type type)
{
rtx loc;
int mem_valid;
}
secondary_memlocs_elim[(int) mode][opnum] = loc;
+ if (secondary_memlocs_elim_used <= (int)mode)
+ secondary_memlocs_elim_used = (int)mode + 1;
return loc;
}
/* Clear any secondary memory locations we've made. */
void
-clear_secondary_mem ()
+clear_secondary_mem (void)
{
- memset ((char *) secondary_memlocs, 0, sizeof secondary_memlocs);
+ memset (secondary_memlocs, 0, sizeof secondary_memlocs);
}
#endif /* SECONDARY_MEMORY_NEEDED */
\f
-/* Find the largest class for which every register number plus N is valid in
- M1 (if in range) and is cheap to move into REGNO.
- Abort if no such class exists. */
+
+/* Find the largest class which has at least one register valid in
+ mode INNER, and which for every such register, that register number
+ plus N is also valid in OUTER (if in range) and is cheap to move
+ into REGNO. Such a class must exist. */
static enum reg_class
-find_valid_class (m1, n, dest_regno)
- enum machine_mode m1 ATTRIBUTE_UNUSED;
- int n;
- unsigned int dest_regno ATTRIBUTE_UNUSED;
+find_valid_class (enum machine_mode outer ATTRIBUTE_UNUSED,
+ enum machine_mode inner ATTRIBUTE_UNUSED, int n,
+ unsigned int dest_regno ATTRIBUTE_UNUSED)
{
int best_cost = -1;
int class;
for (class = 1; class < N_REG_CLASSES; class++)
{
int bad = 0;
- for (regno = 0; regno < FIRST_PSEUDO_REGISTER && ! bad; regno++)
- if (TEST_HARD_REG_BIT (reg_class_contents[class], regno)
- && TEST_HARD_REG_BIT (reg_class_contents[class], regno + n)
- && ! HARD_REGNO_MODE_OK (regno + n, m1))
- bad = 1;
+ int good = 0;
+ for (regno = 0; regno < FIRST_PSEUDO_REGISTER - n && ! bad; regno++)
+ if (TEST_HARD_REG_BIT (reg_class_contents[class], regno))
+ {
+ if (HARD_REGNO_MODE_OK (regno, inner))
+ {
+ good = 1;
+ if (! TEST_HARD_REG_BIT (reg_class_contents[class], regno + n)
+ || ! HARD_REGNO_MODE_OK (regno + n, outer))
+ bad = 1;
+ }
+ }
- if (bad)
+ if (bad || !good)
continue;
- cost = REGISTER_MOVE_COST (m1, class, dest_class);
+ cost = REGISTER_MOVE_COST (outer, class, dest_class);
if ((reg_class_size[class] > best_size
&& (best_cost < 0 || best_cost >= cost))
{
best_class = class;
best_size = reg_class_size[class];
- best_cost = REGISTER_MOVE_COST (m1, class, dest_class);
+ best_cost = REGISTER_MOVE_COST (outer, class, dest_class);
}
}
- if (best_size == 0)
- abort ();
+ gcc_assert (best_size != 0);
return best_class;
}
DONT_SHARE is nonzero if we can't share any input-only reload for IN. */
static int
-find_reusable_reload (p_in, out, class, type, opnum, dont_share)
- rtx *p_in, out;
- enum reg_class class;
- enum reload_type type;
- int opnum, dont_share;
+find_reusable_reload (rtx *p_in, rtx out, enum reg_class class,
+ enum reload_type type, int opnum, int dont_share)
{
rtx in = *p_in;
int i;
|| (out != 0 && MATCHES (rld[i].out, out)
&& (in == 0 || rld[i].in == 0 || MATCHES (rld[i].in, in))))
&& (rld[i].out == 0 || ! earlyclobber_operand_p (rld[i].out))
- && (reg_class_size[(int) class] == 1 || SMALL_REGISTER_CLASSES)
+ && (SMALL_REGISTER_CLASS_P (class) || SMALL_REGISTER_CLASSES)
&& MERGABLE_RELOADS (type, rld[i].when_needed, opnum, rld[i].opnum))
return i;
|| TEST_HARD_REG_BIT (reg_class_contents[(int) class],
true_regnum (rld[i].reg_rtx)))
&& out == 0 && rld[i].out == 0 && rld[i].in != 0
- && ((GET_CODE (in) == REG
- && GET_RTX_CLASS (GET_CODE (rld[i].in)) == 'a'
+ && ((REG_P (in)
+ && GET_RTX_CLASS (GET_CODE (rld[i].in)) == RTX_AUTOINC
&& MATCHES (XEXP (rld[i].in, 0), in))
- || (GET_CODE (rld[i].in) == REG
- && GET_RTX_CLASS (GET_CODE (in)) == 'a'
+ || (REG_P (rld[i].in)
+ && GET_RTX_CLASS (GET_CODE (in)) == RTX_AUTOINC
&& MATCHES (XEXP (in, 0), rld[i].in)))
&& (rld[i].out == 0 || ! earlyclobber_operand_p (rld[i].out))
- && (reg_class_size[(int) class] == 1 || SMALL_REGISTER_CLASSES)
+ && (SMALL_REGISTER_CLASS_P (class) || SMALL_REGISTER_CLASSES)
&& MERGABLE_RELOADS (type, rld[i].when_needed,
opnum, rld[i].opnum))
{
/* Make sure reload_in ultimately has the increment,
not the plain register. */
- if (GET_CODE (in) == REG)
+ if (REG_P (in))
*p_in = rld[i].in;
return i;
}
SUBREG_REG expression. */
static int
-reload_inner_reg_of_subreg (x, mode, output)
- rtx x;
- enum machine_mode mode;
- int output;
+reload_inner_reg_of_subreg (rtx x, enum machine_mode mode, int output)
{
rtx inner;
/* If INNER is not a hard register, then INNER will not need to
be reloaded. */
- if (GET_CODE (inner) != REG
+ if (!REG_P (inner)
|| REGNO (inner) >= FIRST_PSEUDO_REGISTER)
return 0;
&& output
&& GET_MODE_SIZE (GET_MODE (inner)) > UNITS_PER_WORD
&& ((GET_MODE_SIZE (GET_MODE (inner)) / UNITS_PER_WORD)
- != (int) HARD_REGNO_NREGS (REGNO (inner), GET_MODE (inner))));
+ != (int) hard_regno_nregs[REGNO (inner)][GET_MODE (inner)]));
+}
+
+/* Return nonzero if IN can be reloaded into REGNO with mode MODE without
+ requiring an extra reload register. The caller has already found that
+ IN contains some reference to REGNO, so check that we can produce the
+ new value in a single step. E.g. if we have
+ (set (reg r13) (plus (reg r13) (const int 1))), and there is an
+ instruction that adds one to a register, this should succeed.
+ However, if we have something like
+ (set (reg r13) (plus (reg r13) (const int 999))), and the constant 999
+ needs to be loaded into a register first, we need a separate reload
+ register.
+ Such PLUS reloads are generated by find_reload_address_part.
+ The out-of-range PLUS expressions are usually introduced in the instruction
+ patterns by register elimination and substituting pseudos without a home
+ by their function-invariant equivalences. */
+static int
+can_reload_into (rtx in, int regno, enum machine_mode mode)
+{
+ rtx dst, test_insn;
+ int r = 0;
+ struct recog_data save_recog_data;
+
+ /* For matching constraints, we often get notional input reloads where
+ we want to use the original register as the reload register. I.e.
+ technically this is a non-optional input-output reload, but IN is
+ already a valid register, and has been chosen as the reload register.
+ Speed this up, since it trivially works. */
+ if (REG_P (in))
+ return 1;
+
+ /* To test MEMs properly, we'd have to take into account all the reloads
+ that are already scheduled, which can become quite complicated.
+ And since we've already handled address reloads for this MEM, it
+ should always succeed anyway. */
+ if (MEM_P (in))
+ return 1;
+
+ /* If we can make a simple SET insn that does the job, everything should
+ be fine. */
+ dst = gen_rtx_REG (mode, regno);
+ test_insn = make_insn_raw (gen_rtx_SET (VOIDmode, dst, in));
+ save_recog_data = recog_data;
+ if (recog_memoized (test_insn) >= 0)
+ {
+ extract_insn (test_insn);
+ r = constrain_operands (1);
+ }
+ recog_data = save_recog_data;
+ return r;
}
/* Record one reload that needs to be performed.
distinguish them. */
int
-push_reload (in, out, inloc, outloc, class,
- inmode, outmode, strict_low, optional, opnum, type)
- rtx in, out;
- rtx *inloc, *outloc;
- enum reg_class class;
- enum machine_mode inmode, outmode;
- int strict_low;
- int optional;
- int opnum;
- enum reload_type type;
+push_reload (rtx in, rtx out, rtx *inloc, rtx *outloc,
+ enum reg_class class, enum machine_mode inmode,
+ enum machine_mode outmode, int strict_low, int optional,
+ int opnum, enum reload_type type)
{
int i;
int dont_share = 0;
it is not in a hard register, reload straight from the constant,
since we want to get rid of such pseudo registers.
Often this is done earlier, but not always in find_reloads_address. */
- if (in != 0 && GET_CODE (in) == REG)
+ if (in != 0 && REG_P (in))
{
int regno = REGNO (in);
/* Likewise for OUT. Of course, OUT will never be equivalent to
an actual constant, but it might be equivalent to a memory location
(in the case of a parameter). */
- if (out != 0 && GET_CODE (out) == REG)
+ if (out != 0 && REG_P (out))
{
int regno = REGNO (out);
/* If we have a read-write operand with an address side-effect,
change either IN or OUT so the side-effect happens only once. */
- if (in != 0 && out != 0 && GET_CODE (in) == MEM && rtx_equal_p (in, out))
+ if (in != 0 && out != 0 && MEM_P (in) && rtx_equal_p (in, out))
switch (GET_CODE (XEXP (in, 0)))
{
case POST_INC: case POST_DEC: case POST_MODIFY:
&& (CONSTANT_P (SUBREG_REG (in))
|| GET_CODE (SUBREG_REG (in)) == PLUS
|| strict_low
- || (((GET_CODE (SUBREG_REG (in)) == REG
+ || (((REG_P (SUBREG_REG (in))
&& REGNO (SUBREG_REG (in)) >= FIRST_PSEUDO_REGISTER)
- || GET_CODE (SUBREG_REG (in)) == MEM)
+ || MEM_P (SUBREG_REG (in)))
&& ((GET_MODE_SIZE (inmode)
> GET_MODE_SIZE (GET_MODE (SUBREG_REG (in))))
#ifdef LOAD_EXTEND_OP
&& (GET_MODE_SIZE (inmode)
> GET_MODE_SIZE (GET_MODE (SUBREG_REG (in))))
&& INTEGRAL_MODE_P (GET_MODE (SUBREG_REG (in)))
- && LOAD_EXTEND_OP (GET_MODE (SUBREG_REG (in))) != NIL)
+ && LOAD_EXTEND_OP (GET_MODE (SUBREG_REG (in))) != UNKNOWN)
#endif
#ifdef WORD_REGISTER_OPERATIONS
|| ((GET_MODE_SIZE (inmode)
/ UNITS_PER_WORD)))
#endif
))
- || (GET_CODE (SUBREG_REG (in)) == REG
+ || (REG_P (SUBREG_REG (in))
&& REGNO (SUBREG_REG (in)) < FIRST_PSEUDO_REGISTER
/* The case where out is nonzero
is handled differently in the following statement. */
> UNITS_PER_WORD)
&& ((GET_MODE_SIZE (GET_MODE (SUBREG_REG (in)))
/ UNITS_PER_WORD)
- != (int) HARD_REGNO_NREGS (REGNO (SUBREG_REG (in)),
- GET_MODE (SUBREG_REG (in)))))
+ != (int) hard_regno_nregs[REGNO (SUBREG_REG (in))]
+ [GET_MODE (SUBREG_REG (in))]))
|| ! HARD_REGNO_MODE_OK (subreg_regno (in), inmode)))
-#ifdef SECONDARY_INPUT_RELOAD_CLASS
- || (SECONDARY_INPUT_RELOAD_CLASS (class, inmode, in) != NO_REGS
- && (SECONDARY_INPUT_RELOAD_CLASS (class,
- GET_MODE (SUBREG_REG (in)),
- SUBREG_REG (in))
+ || (secondary_reload_class (1, class, inmode, in) != NO_REGS
+ && (secondary_reload_class (1, class, GET_MODE (SUBREG_REG (in)),
+ SUBREG_REG (in))
== NO_REGS))
-#endif
#ifdef CANNOT_CHANGE_MODE_CLASS
- || (GET_CODE (SUBREG_REG (in)) == REG
+ || (REG_P (SUBREG_REG (in))
&& REGNO (SUBREG_REG (in)) < FIRST_PSEUDO_REGISTER
&& REG_CANNOT_CHANGE_MODE_P
(REGNO (SUBREG_REG (in)), GET_MODE (SUBREG_REG (in)), inmode))
inloc = &SUBREG_REG (in);
in = *inloc;
#if ! defined (LOAD_EXTEND_OP) && ! defined (WORD_REGISTER_OPERATIONS)
- if (GET_CODE (in) == MEM)
+ if (MEM_P (in))
/* This is supposed to happen only for paradoxical subregs made by
combine.c. (SUBREG (MEM)) isn't supposed to occur other ways. */
- if (GET_MODE_SIZE (GET_MODE (in)) > GET_MODE_SIZE (inmode))
- abort ();
+ gcc_assert (GET_MODE_SIZE (GET_MODE (in)) <= GET_MODE_SIZE (inmode));
#endif
inmode = GET_MODE (in);
}
{
enum reg_class in_class = class;
- if (GET_CODE (SUBREG_REG (in)) == REG)
+ if (REG_P (SUBREG_REG (in)))
in_class
- = find_valid_class (inmode,
+ = find_valid_class (inmode, GET_MODE (SUBREG_REG (in)),
subreg_regno_offset (REGNO (SUBREG_REG (in)),
GET_MODE (SUBREG_REG (in)),
SUBREG_BYTE (in),
#endif
&& (CONSTANT_P (SUBREG_REG (out))
|| strict_low
- || (((GET_CODE (SUBREG_REG (out)) == REG
+ || (((REG_P (SUBREG_REG (out))
&& REGNO (SUBREG_REG (out)) >= FIRST_PSEUDO_REGISTER)
- || GET_CODE (SUBREG_REG (out)) == MEM)
+ || MEM_P (SUBREG_REG (out)))
&& ((GET_MODE_SIZE (outmode)
> GET_MODE_SIZE (GET_MODE (SUBREG_REG (out))))
#ifdef WORD_REGISTER_OPERATIONS
/ UNITS_PER_WORD)))
#endif
))
- || (GET_CODE (SUBREG_REG (out)) == REG
+ || (REG_P (SUBREG_REG (out))
&& REGNO (SUBREG_REG (out)) < FIRST_PSEUDO_REGISTER
&& ((GET_MODE_SIZE (outmode) <= UNITS_PER_WORD
&& (GET_MODE_SIZE (GET_MODE (SUBREG_REG (out)))
> UNITS_PER_WORD)
&& ((GET_MODE_SIZE (GET_MODE (SUBREG_REG (out)))
/ UNITS_PER_WORD)
- != (int) HARD_REGNO_NREGS (REGNO (SUBREG_REG (out)),
- GET_MODE (SUBREG_REG (out)))))
+ != (int) hard_regno_nregs[REGNO (SUBREG_REG (out))]
+ [GET_MODE (SUBREG_REG (out))]))
|| ! HARD_REGNO_MODE_OK (subreg_regno (out), outmode)))
-#ifdef SECONDARY_OUTPUT_RELOAD_CLASS
- || (SECONDARY_OUTPUT_RELOAD_CLASS (class, outmode, out) != NO_REGS
- && (SECONDARY_OUTPUT_RELOAD_CLASS (class,
- GET_MODE (SUBREG_REG (out)),
- SUBREG_REG (out))
+ || (secondary_reload_class (0, class, outmode, out) != NO_REGS
+ && (secondary_reload_class (0, class, GET_MODE (SUBREG_REG (out)),
+ SUBREG_REG (out))
== NO_REGS))
-#endif
#ifdef CANNOT_CHANGE_MODE_CLASS
- || (GET_CODE (SUBREG_REG (out)) == REG
+ || (REG_P (SUBREG_REG (out))
&& REGNO (SUBREG_REG (out)) < FIRST_PSEUDO_REGISTER
&& REG_CANNOT_CHANGE_MODE_P (REGNO (SUBREG_REG (out)),
- GET_MODE (SUBREG_REG (out)),
+ GET_MODE (SUBREG_REG (out)),
outmode))
#endif
))
outloc = &SUBREG_REG (out);
out = *outloc;
#if ! defined (LOAD_EXTEND_OP) && ! defined (WORD_REGISTER_OPERATIONS)
- if (GET_CODE (out) == MEM
- && GET_MODE_SIZE (GET_MODE (out)) > GET_MODE_SIZE (outmode))
- abort ();
+ gcc_assert (!MEM_P (out)
+ || GET_MODE_SIZE (GET_MODE (out))
+ <= GET_MODE_SIZE (outmode));
#endif
outmode = GET_MODE (out);
}
dont_remove_subreg = 1;
push_reload (SUBREG_REG (out), SUBREG_REG (out), &SUBREG_REG (out),
&SUBREG_REG (out),
- find_valid_class (outmode,
+ find_valid_class (outmode, GET_MODE (SUBREG_REG (out)),
subreg_regno_offset (REGNO (SUBREG_REG (out)),
GET_MODE (SUBREG_REG (out)),
SUBREG_BYTE (out),
}
/* If IN appears in OUT, we can't share any input-only reload for IN. */
- if (in != 0 && out != 0 && GET_CODE (out) == MEM
- && (GET_CODE (in) == REG || GET_CODE (in) == MEM)
+ if (in != 0 && out != 0 && MEM_P (out)
+ && (REG_P (in) || MEM_P (in))
&& reg_overlap_mentioned_for_reload_p (in, XEXP (out, 0)))
dont_share = 1;
/* If IN is a SUBREG of a hard register, make a new REG. This
simplifies some of the cases below. */
- if (in != 0 && GET_CODE (in) == SUBREG && GET_CODE (SUBREG_REG (in)) == REG
+ if (in != 0 && GET_CODE (in) == SUBREG && REG_P (SUBREG_REG (in))
&& REGNO (SUBREG_REG (in)) < FIRST_PSEUDO_REGISTER
&& ! dont_remove_subreg)
in = gen_rtx_REG (GET_MODE (in), subreg_regno (in));
/* Similarly for OUT. */
if (out != 0 && GET_CODE (out) == SUBREG
- && GET_CODE (SUBREG_REG (out)) == REG
+ && REG_P (SUBREG_REG (out))
&& REGNO (SUBREG_REG (out)) < FIRST_PSEUDO_REGISTER
&& ! dont_remove_subreg)
out = gen_rtx_REG (GET_MODE (out), subreg_regno (out));
/* Narrow down the class of register wanted if that is
desirable on this machine for efficiency. */
- if (in != 0)
- class = PREFERRED_RELOAD_CLASS (in, class);
+ {
+ enum reg_class preferred_class = class;
+
+ if (in != 0)
+ preferred_class = PREFERRED_RELOAD_CLASS (in, class);
/* Output reloads may need analogous treatment, different in detail. */
#ifdef PREFERRED_OUTPUT_RELOAD_CLASS
- if (out != 0)
- class = PREFERRED_OUTPUT_RELOAD_CLASS (out, class);
+ if (out != 0)
+ preferred_class = PREFERRED_OUTPUT_RELOAD_CLASS (out, preferred_class);
#endif
+ /* Discard what the target said if we cannot do it. */
+ if (preferred_class != NO_REGS
+ || (optional && type == RELOAD_FOR_OUTPUT))
+ class = preferred_class;
+ }
+
/* Make sure we use a class that can handle the actual pseudo
inside any subreg. For example, on the 386, QImode regs
can appear within SImode subregs. Although GENERAL_REGS
mode = outmode;
if (mode == VOIDmode)
{
- error_for_asm (this_insn, "cannot reload integer constant operand in `asm'");
+ error_for_asm (this_insn, "cannot reload integer constant "
+ "operand in %<asm%>");
mode = word_mode;
if (in != 0)
inmode = word_mode;
if (HARD_REGNO_MODE_OK (i, mode)
&& TEST_HARD_REG_BIT (reg_class_contents[(int) class], i))
{
- int nregs = HARD_REGNO_NREGS (i, mode);
+ int nregs = hard_regno_nregs[i][mode];
int j;
for (j = 1; j < nregs; j++)
}
if (i == FIRST_PSEUDO_REGISTER)
{
- error_for_asm (this_insn, "impossible register constraint in `asm'");
- class = ALL_REGS;
+ error_for_asm (this_insn, "impossible register constraint "
+ "in %<asm%>");
+ /* Avoid further trouble with this insn. */
+ PATTERN (this_insn) = gen_rtx_USE (VOIDmode, const0_rtx);
+ /* We used to continue here setting class to ALL_REGS, but it triggers
+ sanity check on i386 for:
+ void foo(long double d)
+ {
+ asm("" :: "a" (d));
+ }
+ Returning zero here ought to be safe as we take care in
+ find_reloads to not process the reloads when instruction was
+ replaced by USE. */
+
+ return 0;
}
}
/* Optional output reloads are always OK even if we have no register class,
since the function of these reloads is only to have spill_reg_store etc.
set, so that the storing insn can be deleted later. */
- if (class == NO_REGS
- && (optional == 0 || type != RELOAD_FOR_OUTPUT))
- abort ();
+ gcc_assert (class != NO_REGS
+ || (optional != 0 && type == RELOAD_FOR_OUTPUT));
i = find_reusable_reload (&in, out, class, type, opnum, dont_share);
and IN or CLASS and OUT. Get the icode and push any required reloads
needed for each of them if so. */
-#ifdef SECONDARY_INPUT_RELOAD_CLASS
if (in != 0)
secondary_in_reload
= push_secondary_reload (1, in, opnum, optional, class, inmode, type,
- &secondary_in_icode);
-#endif
-
-#ifdef SECONDARY_OUTPUT_RELOAD_CLASS
+ &secondary_in_icode, NULL);
if (out != 0 && GET_CODE (out) != SCRATCH)
secondary_out_reload
= push_secondary_reload (0, out, opnum, optional, class, outmode,
- type, &secondary_out_icode);
-#endif
+ type, &secondary_out_icode, NULL);
/* We found no existing reload suitable for re-use.
So add an additional reload. */
#ifdef SECONDARY_MEMORY_NEEDED
/* If a memory location is needed for the copy, make one. */
- if (in != 0 && (GET_CODE (in) == REG || GET_CODE (in) == SUBREG)
+ if (in != 0
+ && (REG_P (in)
+ || (GET_CODE (in) == SUBREG && REG_P (SUBREG_REG (in))))
&& reg_or_subregno (in) < FIRST_PSEUDO_REGISTER
&& SECONDARY_MEMORY_NEEDED (REGNO_REG_CLASS (reg_or_subregno (in)),
class, inmode))
n_reloads++;
#ifdef SECONDARY_MEMORY_NEEDED
- if (out != 0 && (GET_CODE (out) == REG || GET_CODE (out) == SUBREG)
+ if (out != 0
+ && (REG_P (out)
+ || (GET_CODE (out) == SUBREG && REG_P (SUBREG_REG (out))))
&& reg_or_subregno (out) < FIRST_PSEUDO_REGISTER
&& SECONDARY_MEMORY_NEEDED (class,
REGNO_REG_CLASS (reg_or_subregno (out)),
/* If we did not find a nonzero amount-to-increment-by,
that contradicts the belief that IN is being incremented
in an address in this insn. */
- if (rld[i].inc == 0)
- abort ();
+ gcc_assert (rld[i].inc != 0);
}
#endif
The easiest way to tell the caller that is to give a phony
value for the incoming operand (same as outgoing one). */
if (rld[i].reg_rtx == out
- && (GET_CODE (in) == REG || CONSTANT_P (in))
+ && (REG_P (in) || CONSTANT_P (in))
&& 0 != find_equiv_reg (in, this_insn, 0, REGNO (out),
static_reload_reg_p, i, inmode))
rld[i].in = out;
But if there is no spilling in this block, that is OK.
An explicitly used hard reg cannot be a spill reg. */
- if (rld[i].reg_rtx == 0 && in != 0)
+ if (rld[i].reg_rtx == 0 && in != 0 && hard_regs_live_known)
{
rtx note;
int regno;
for (note = REG_NOTES (this_insn); note; note = XEXP (note, 1))
if (REG_NOTE_KIND (note) == REG_DEAD
- && GET_CODE (XEXP (note, 0)) == REG
+ && REG_P (XEXP (note, 0))
&& (regno = REGNO (XEXP (note, 0))) < FIRST_PSEUDO_REGISTER
&& reg_mentioned_p (XEXP (note, 0), in)
+ /* Check that we don't use a hardreg for an uninitialized
+ pseudo. See also find_dummy_reload(). */
+ && (ORIGINAL_REGNO (XEXP (note, 0)) < FIRST_PSEUDO_REGISTER
+ || ! bitmap_bit_p (ENTRY_BLOCK_PTR->il.rtl->global_live_at_end,
+ ORIGINAL_REGNO (XEXP (note, 0))))
&& ! refers_to_regno_for_reload_p (regno,
(regno
- + HARD_REGNO_NREGS (regno,
- rel_mode)),
+ + hard_regno_nregs[regno]
+ [rel_mode]),
PATTERN (this_insn), inloc)
/* If this is also an output reload, IN cannot be used as
the reload register if it is set in this insn unless IN
&& (out == 0 || in == out
|| ! hard_reg_set_here_p (regno,
(regno
- + HARD_REGNO_NREGS (regno,
- rel_mode)),
+ + hard_regno_nregs[regno]
+ [rel_mode]),
PATTERN (this_insn)))
/* ??? Why is this code so different from the previous?
Is there any simple coherent way to describe the two together?
&& HARD_REGNO_MODE_OK (regno, outmode))
{
unsigned int offs;
- unsigned int nregs = MAX (HARD_REGNO_NREGS (regno, inmode),
- HARD_REGNO_NREGS (regno, outmode));
+ unsigned int nregs = MAX (hard_regno_nregs[regno][inmode],
+ hard_regno_nregs[regno][outmode]);
for (offs = 0; offs < nregs; offs++)
if (fixed_regs[regno + offs]
regno + offs))
break;
- if (offs == nregs)
+ if (offs == nregs
+ && (! (refers_to_regno_for_reload_p
+ (regno, (regno + hard_regno_nregs[regno][inmode]),
+ in, (rtx *)0))
+ || can_reload_into (in, regno, inmode)))
{
rld[i].reg_rtx = gen_rtx_REG (rel_mode, regno);
break;
This is used in insn patterns that use match_dup. */
static void
-push_replacement (loc, reloadnum, mode)
- rtx *loc;
- int reloadnum;
- enum machine_mode mode;
+push_replacement (rtx *loc, int reloadnum, enum machine_mode mode)
{
if (replace_reloads)
{
This is used in insn patterns that use match_dup. */
static void
-dup_replacements (dup_loc, orig_loc)
- rtx *dup_loc;
- rtx *orig_loc;
+dup_replacements (rtx *dup_loc, rtx *orig_loc)
{
int i, n = n_replacements;
reload TO. */
void
-transfer_replacements (to, from)
- int to, from;
+transfer_replacements (int to, int from)
{
int i;
cancel the reloads that were supposed to load them.
Return nonzero if we canceled any reloads. */
int
-remove_address_replacements (in_rtx)
- rtx in_rtx;
+remove_address_replacements (rtx in_rtx)
{
int i, j;
char reload_flags[MAX_RELOADS];
class and does not appear in the value being output-reloaded. */
static void
-combine_reloads ()
+combine_reloads (void)
{
int i;
int output_reload = -1;
return;
/* If there is a reload for part of the address of this operand, we would
- need to chnage it to RELOAD_FOR_OTHER_ADDRESS. But that would extend
+ need to change it to RELOAD_FOR_OTHER_ADDRESS. But that would extend
its life to the point where doing this combine would not lower the
number of spill registers needed. */
for (i = 0; i < n_reloads; i++)
If the same reload reg is used for both reg 69 and the
result to be stored in memory, then that result
will clobber the address of the memory ref. */
- && ! (GET_CODE (rld[i].in) == REG
+ && ! (REG_P (rld[i].in)
&& reg_overlap_mentioned_for_reload_p (rld[i].in,
rld[output_reload].out))))
&& ! reload_inner_reg_of_subreg (rld[i].in, rld[i].inmode,
up can fully hold our output reload. */
for (note = REG_NOTES (this_insn); note; note = XEXP (note, 1))
if (REG_NOTE_KIND (note) == REG_DEAD
- && GET_CODE (XEXP (note, 0)) == REG
+ && REG_P (XEXP (note, 0))
&& ! reg_overlap_mentioned_for_reload_p (XEXP (note, 0),
rld[output_reload].out)
&& REGNO (XEXP (note, 0)) < FIRST_PSEUDO_REGISTER
&& HARD_REGNO_MODE_OK (REGNO (XEXP (note, 0)), rld[output_reload].outmode)
&& TEST_HARD_REG_BIT (reg_class_contents[(int) rld[output_reload].class],
REGNO (XEXP (note, 0)))
- && (HARD_REGNO_NREGS (REGNO (XEXP (note, 0)), rld[output_reload].outmode)
- <= HARD_REGNO_NREGS (REGNO (XEXP (note, 0)), GET_MODE (XEXP (note, 0))))
+ && (hard_regno_nregs[REGNO (XEXP (note, 0))][rld[output_reload].outmode]
+ <= hard_regno_nregs[REGNO (XEXP (note, 0))][GET_MODE (XEXP (note, 0))])
/* Ensure that a secondary or tertiary reload for this output
won't want this register. */
&& ((secondary_out = rld[output_reload].secondary_out_reload) == -1
is safe from the earlyclobber). */
static rtx
-find_dummy_reload (real_in, real_out, inloc, outloc,
- inmode, outmode, class, for_real, earlyclobber)
- rtx real_in, real_out;
- rtx *inloc, *outloc;
- enum machine_mode inmode, outmode;
- enum reg_class class;
- int for_real;
- int earlyclobber;
+find_dummy_reload (rtx real_in, rtx real_out, rtx *inloc, rtx *outloc,
+ enum machine_mode inmode, enum machine_mode outmode,
+ enum reg_class class, int for_real, int earlyclobber)
{
rtx in = real_in;
rtx out = real_out;
/* Find the inside of any subregs. */
while (GET_CODE (out) == SUBREG)
{
- if (GET_CODE (SUBREG_REG (out)) == REG
+ if (REG_P (SUBREG_REG (out))
&& REGNO (SUBREG_REG (out)) < FIRST_PSEUDO_REGISTER)
out_offset += subreg_regno_offset (REGNO (SUBREG_REG (out)),
GET_MODE (SUBREG_REG (out)),
}
while (GET_CODE (in) == SUBREG)
{
- if (GET_CODE (SUBREG_REG (in)) == REG
+ if (REG_P (SUBREG_REG (in))
&& REGNO (SUBREG_REG (in)) < FIRST_PSEUDO_REGISTER)
in_offset += subreg_regno_offset (REGNO (SUBREG_REG (in)),
GET_MODE (SUBREG_REG (in)),
/* Narrow down the reg class, the same way push_reload will;
otherwise we might find a dummy now, but push_reload won't. */
- class = PREFERRED_RELOAD_CLASS (in, class);
+ {
+ enum reg_class preferred_class = PREFERRED_RELOAD_CLASS (in, class);
+ if (preferred_class != NO_REGS)
+ class = preferred_class;
+ }
/* See if OUT will do. */
- if (GET_CODE (out) == REG
+ if (REG_P (out)
&& REGNO (out) < FIRST_PSEUDO_REGISTER)
{
unsigned int regno = REGNO (out) + out_offset;
- unsigned int nwords = HARD_REGNO_NREGS (regno, outmode);
+ unsigned int nwords = hard_regno_nregs[regno][outmode];
rtx saved_rtx;
/* When we consider whether the insn uses OUT,
if (i == nwords)
{
- if (GET_CODE (real_out) == REG)
+ if (REG_P (real_out))
value = real_out;
else
value = gen_rtx_REG (outmode, regno);
Also, the result can't go in IN if IN is used within OUT,
or if OUT is an earlyclobber and IN appears elsewhere in the insn. */
if (hard_regs_live_known
- && GET_CODE (in) == REG
+ && REG_P (in)
&& REGNO (in) < FIRST_PSEUDO_REGISTER
&& (value == 0
|| find_reg_note (this_insn, REG_UNUSED, real_out))
is a subreg, and in that case, out
has a real mode. */
(GET_MODE (out) != VOIDmode
- ? GET_MODE (out) : outmode)))
+ ? GET_MODE (out) : outmode))
+ /* But only do all this if we can be sure, that this input
+ operand doesn't correspond with an uninitialized pseudoreg.
+ global can assign some hardreg to it, which is the same as
+ a different pseudo also currently live (as it can ignore the
+ conflict). So we never must introduce writes to such hardregs,
+ as they would clobber the other live pseudo using the same.
+ See also PR20973. */
+ && (ORIGINAL_REGNO (in) < FIRST_PSEUDO_REGISTER
+ || ! bitmap_bit_p (ENTRY_BLOCK_PTR->il.rtl->global_live_at_end,
+ ORIGINAL_REGNO (in))))
{
unsigned int regno = REGNO (in) + in_offset;
- unsigned int nwords = HARD_REGNO_NREGS (regno, inmode);
+ unsigned int nwords = hard_regno_nregs[regno][inmode];
if (! refers_to_regno_for_reload_p (regno, regno + nwords, out, (rtx*) 0)
&& ! hard_reg_set_here_p (regno, regno + nwords,
dies here. So don't bother copying value to it. */
if (for_real >= 0 && value == real_out)
rld[for_real].out = 0;
- if (GET_CODE (real_in) == REG)
+ if (REG_P (real_in))
value = real_in;
else
value = gen_rtx_REG (inmode, regno);
/* Return 1 if X is an operand of an insn that is being earlyclobbered. */
int
-earlyclobber_operand_p (x)
- rtx x;
+earlyclobber_operand_p (rtx x)
{
int i;
X should be the body of an instruction. */
static int
-hard_reg_set_here_p (beg_regno, end_regno, x)
- unsigned int beg_regno, end_regno;
- rtx x;
+hard_reg_set_here_p (unsigned int beg_regno, unsigned int end_regno, rtx x)
{
if (GET_CODE (x) == SET || GET_CODE (x) == CLOBBER)
{
while (GET_CODE (op0) == SUBREG)
op0 = SUBREG_REG (op0);
- if (GET_CODE (op0) == REG)
+ if (REG_P (op0))
{
unsigned int r = REGNO (op0);
/* See if this reg overlaps range under consideration. */
if (r < end_regno
- && r + HARD_REGNO_NREGS (r, GET_MODE (op0)) > beg_regno)
+ && r + hard_regno_nregs[r][GET_MODE (op0)] > beg_regno)
return 1;
}
}
hard reg. */
int
-strict_memory_address_p (mode, addr)
- enum machine_mode mode ATTRIBUTE_UNUSED;
- rtx addr;
+strict_memory_address_p (enum machine_mode mode ATTRIBUTE_UNUSED, rtx addr)
{
GO_IF_LEGITIMATE_ADDRESS (mode, addr, win);
return 0;
because that is natural in (SET output (... input ...)). */
int
-operands_match_p (x, y)
- rtx x, y;
+operands_match_p (rtx x, rtx y)
{
int i;
RTX_CODE code = GET_CODE (x);
if (x == y)
return 1;
- if ((code == REG || (code == SUBREG && GET_CODE (SUBREG_REG (x)) == REG))
- && (GET_CODE (y) == REG || (GET_CODE (y) == SUBREG
- && GET_CODE (SUBREG_REG (y)) == REG)))
+ if ((code == REG || (code == SUBREG && REG_P (SUBREG_REG (x))))
+ && (REG_P (y) || (GET_CODE (y) == SUBREG
+ && REG_P (SUBREG_REG (y)))))
{
int j;
j = REGNO (y);
/* On a WORDS_BIG_ENDIAN machine, point to the last register of a
- multiple hard register group, so that for example (reg:DI 0) and
- (reg:SI 1) will be considered the same register. */
+ multiple hard register group of scalar integer registers, so that
+ for example (reg:DI 0) and (reg:SI 1) will be considered the same
+ register. */
if (WORDS_BIG_ENDIAN && GET_MODE_SIZE (GET_MODE (x)) > UNITS_PER_WORD
+ && SCALAR_INT_MODE_P (GET_MODE (x))
&& i < FIRST_PSEUDO_REGISTER)
- i += HARD_REGNO_NREGS (i, GET_MODE (x)) - 1;
+ i += hard_regno_nregs[i][GET_MODE (x)] - 1;
if (WORDS_BIG_ENDIAN && GET_MODE_SIZE (GET_MODE (y)) > UNITS_PER_WORD
+ && SCALAR_INT_MODE_P (GET_MODE (y))
&& j < FIRST_PSEUDO_REGISTER)
- j += HARD_REGNO_NREGS (j, GET_MODE (y)) - 1;
+ j += hard_regno_nregs[j][GET_MODE (y)] - 1;
return i == j;
}
slow:
- /* Now we have disposed of all the cases
- in which different rtx codes can match. */
+ /* Now we have disposed of all the cases in which different rtx codes
+ can match. */
if (code != GET_CODE (y))
return 0;
- if (code == LABEL_REF)
- return XEXP (x, 0) == XEXP (y, 0);
- if (code == SYMBOL_REF)
- return XSTR (x, 0) == XSTR (y, 0);
/* (MULT:SI x y) and (MULT:HI x y) are NOT equivalent. */
-
if (GET_MODE (x) != GET_MODE (y))
return 0;
+ switch (code)
+ {
+ case CONST_INT:
+ case CONST_DOUBLE:
+ return 0;
+
+ case LABEL_REF:
+ return XEXP (x, 0) == XEXP (y, 0);
+ case SYMBOL_REF:
+ return XSTR (x, 0) == XSTR (y, 0);
+
+ default:
+ break;
+ }
+
/* Compare the elements. If any pair of corresponding elements
fail to match, return 0 for the whole things. */
contain anything but integers and other rtx's,
except for within LABEL_REFs and SYMBOL_REFs. */
default:
- abort ();
+ gcc_unreachable ();
}
}
return 1 + success_2;
so we set the SAFE field. */
static struct decomposition
-decompose (x)
- rtx x;
+decompose (rtx x)
{
struct decomposition val;
int all_const = 0;
- val.reg_flag = 0;
- val.safe = 0;
- val.base = 0;
- if (GET_CODE (x) == MEM)
- {
- rtx base = NULL_RTX, offset = 0;
- rtx addr = XEXP (x, 0);
+ memset (&val, 0, sizeof (val));
- if (GET_CODE (addr) == PRE_DEC || GET_CODE (addr) == PRE_INC
- || GET_CODE (addr) == POST_DEC || GET_CODE (addr) == POST_INC)
- {
- val.base = XEXP (addr, 0);
- val.start = -GET_MODE_SIZE (GET_MODE (x));
- val.end = GET_MODE_SIZE (GET_MODE (x));
- val.safe = REGNO (val.base) == STACK_POINTER_REGNUM;
- return val;
- }
-
- if (GET_CODE (addr) == PRE_MODIFY || GET_CODE (addr) == POST_MODIFY)
- {
- if (GET_CODE (XEXP (addr, 1)) == PLUS
- && XEXP (addr, 0) == XEXP (XEXP (addr, 1), 0)
- && CONSTANT_P (XEXP (XEXP (addr, 1), 1)))
- {
- val.base = XEXP (addr, 0);
- val.start = -INTVAL (XEXP (XEXP (addr, 1), 1));
- val.end = INTVAL (XEXP (XEXP (addr, 1), 1));
- val.safe = REGNO (val.base) == STACK_POINTER_REGNUM;
- return val;
- }
- }
-
- if (GET_CODE (addr) == CONST)
- {
- addr = XEXP (addr, 0);
- all_const = 1;
- }
- if (GET_CODE (addr) == PLUS)
- {
- if (CONSTANT_P (XEXP (addr, 0)))
- {
- base = XEXP (addr, 1);
- offset = XEXP (addr, 0);
- }
- else if (CONSTANT_P (XEXP (addr, 1)))
- {
- base = XEXP (addr, 0);
- offset = XEXP (addr, 1);
- }
- }
-
- if (offset == 0)
- {
- base = addr;
- offset = const0_rtx;
- }
- if (GET_CODE (offset) == CONST)
- offset = XEXP (offset, 0);
- if (GET_CODE (offset) == PLUS)
- {
- if (GET_CODE (XEXP (offset, 0)) == CONST_INT)
- {
- base = gen_rtx_PLUS (GET_MODE (base), base, XEXP (offset, 1));
- offset = XEXP (offset, 0);
- }
- else if (GET_CODE (XEXP (offset, 1)) == CONST_INT)
- {
- base = gen_rtx_PLUS (GET_MODE (base), base, XEXP (offset, 0));
- offset = XEXP (offset, 1);
- }
- else
- {
- base = gen_rtx_PLUS (GET_MODE (base), base, offset);
- offset = const0_rtx;
- }
- }
- else if (GET_CODE (offset) != CONST_INT)
- {
- base = gen_rtx_PLUS (GET_MODE (base), base, offset);
- offset = const0_rtx;
- }
-
- if (all_const && GET_CODE (base) == PLUS)
- base = gen_rtx_CONST (GET_MODE (base), base);
-
- if (GET_CODE (offset) != CONST_INT)
- abort ();
-
- val.start = INTVAL (offset);
- val.end = val.start + GET_MODE_SIZE (GET_MODE (x));
- val.base = base;
- return val;
- }
- else if (GET_CODE (x) == REG)
+ switch (GET_CODE (x))
{
+ case MEM:
+ {
+ rtx base = NULL_RTX, offset = 0;
+ rtx addr = XEXP (x, 0);
+
+ if (GET_CODE (addr) == PRE_DEC || GET_CODE (addr) == PRE_INC
+ || GET_CODE (addr) == POST_DEC || GET_CODE (addr) == POST_INC)
+ {
+ val.base = XEXP (addr, 0);
+ val.start = -GET_MODE_SIZE (GET_MODE (x));
+ val.end = GET_MODE_SIZE (GET_MODE (x));
+ val.safe = REGNO (val.base) == STACK_POINTER_REGNUM;
+ return val;
+ }
+
+ if (GET_CODE (addr) == PRE_MODIFY || GET_CODE (addr) == POST_MODIFY)
+ {
+ if (GET_CODE (XEXP (addr, 1)) == PLUS
+ && XEXP (addr, 0) == XEXP (XEXP (addr, 1), 0)
+ && CONSTANT_P (XEXP (XEXP (addr, 1), 1)))
+ {
+ val.base = XEXP (addr, 0);
+ val.start = -INTVAL (XEXP (XEXP (addr, 1), 1));
+ val.end = INTVAL (XEXP (XEXP (addr, 1), 1));
+ val.safe = REGNO (val.base) == STACK_POINTER_REGNUM;
+ return val;
+ }
+ }
+
+ if (GET_CODE (addr) == CONST)
+ {
+ addr = XEXP (addr, 0);
+ all_const = 1;
+ }
+ if (GET_CODE (addr) == PLUS)
+ {
+ if (CONSTANT_P (XEXP (addr, 0)))
+ {
+ base = XEXP (addr, 1);
+ offset = XEXP (addr, 0);
+ }
+ else if (CONSTANT_P (XEXP (addr, 1)))
+ {
+ base = XEXP (addr, 0);
+ offset = XEXP (addr, 1);
+ }
+ }
+
+ if (offset == 0)
+ {
+ base = addr;
+ offset = const0_rtx;
+ }
+ if (GET_CODE (offset) == CONST)
+ offset = XEXP (offset, 0);
+ if (GET_CODE (offset) == PLUS)
+ {
+ if (GET_CODE (XEXP (offset, 0)) == CONST_INT)
+ {
+ base = gen_rtx_PLUS (GET_MODE (base), base, XEXP (offset, 1));
+ offset = XEXP (offset, 0);
+ }
+ else if (GET_CODE (XEXP (offset, 1)) == CONST_INT)
+ {
+ base = gen_rtx_PLUS (GET_MODE (base), base, XEXP (offset, 0));
+ offset = XEXP (offset, 1);
+ }
+ else
+ {
+ base = gen_rtx_PLUS (GET_MODE (base), base, offset);
+ offset = const0_rtx;
+ }
+ }
+ else if (GET_CODE (offset) != CONST_INT)
+ {
+ base = gen_rtx_PLUS (GET_MODE (base), base, offset);
+ offset = const0_rtx;
+ }
+
+ if (all_const && GET_CODE (base) == PLUS)
+ base = gen_rtx_CONST (GET_MODE (base), base);
+
+ gcc_assert (GET_CODE (offset) == CONST_INT);
+
+ val.start = INTVAL (offset);
+ val.end = val.start + GET_MODE_SIZE (GET_MODE (x));
+ val.base = base;
+ }
+ break;
+
+ case REG:
val.reg_flag = 1;
val.start = true_regnum (x);
- if (val.start < 0)
+ if (val.start < 0 || val.start >= FIRST_PSEUDO_REGISTER)
{
/* A pseudo with no hard reg. */
val.start = REGNO (x);
}
else
/* A hard reg. */
- val.end = val.start + HARD_REGNO_NREGS (val.start, GET_MODE (x));
- }
- else if (GET_CODE (x) == SUBREG)
- {
- if (GET_CODE (SUBREG_REG (x)) != REG)
+ val.end = val.start + hard_regno_nregs[val.start][GET_MODE (x)];
+ break;
+
+ case SUBREG:
+ if (!REG_P (SUBREG_REG (x)))
/* This could be more precise, but it's good enough. */
return decompose (SUBREG_REG (x));
val.reg_flag = 1;
val.start = true_regnum (x);
- if (val.start < 0)
+ if (val.start < 0 || val.start >= FIRST_PSEUDO_REGISTER)
return decompose (SUBREG_REG (x));
else
/* A hard reg. */
- val.end = val.start + HARD_REGNO_NREGS (val.start, GET_MODE (x));
+ val.end = val.start + subreg_nregs (x);
+ break;
+
+ case SCRATCH:
+ /* This hasn't been assigned yet, so it can't conflict yet. */
+ val.safe = 1;
+ break;
+
+ default:
+ gcc_assert (CONSTANT_P (x));
+ val.safe = 1;
+ break;
}
- else if (CONSTANT_P (x)
- /* This hasn't been assigned yet, so it can't conflict yet. */
- || GET_CODE (x) == SCRATCH)
- val.safe = 1;
- else
- abort ();
return val;
}
Y is also described by YDATA, which should be decompose (Y). */
static int
-immune_p (x, y, ydata)
- rtx x, y;
- struct decomposition ydata;
+immune_p (rtx x, rtx y, struct decomposition ydata)
{
struct decomposition xdata;
if (ydata.safe)
return 1;
- if (GET_CODE (y) != MEM)
- abort ();
+ gcc_assert (MEM_P (y));
/* If Y is memory and X is not, Y can't affect X. */
- if (GET_CODE (x) != MEM)
+ if (!MEM_P (x))
return 1;
xdata = decompose (x);
/* Similar, but calls decompose. */
int
-safe_from_earlyclobber (op, clobber)
- rtx op, clobber;
+safe_from_earlyclobber (rtx op, rtx clobber)
{
struct decomposition early_data;
commutative operands, reg_equiv_address substitution, or whatever. */
int
-find_reloads (insn, replace, ind_levels, live_known, reload_reg_p)
- rtx insn;
- int replace, ind_levels;
- int live_known;
- short *reload_reg_p;
+find_reloads (rtx insn, int replace, int ind_levels, int live_known,
+ short *reload_reg_p)
{
int insn_code_number;
int i, j;
a register. */
enum reg_class preferred_class[MAX_RECOG_OPERANDS];
char pref_or_nothing[MAX_RECOG_OPERANDS];
- /* Nonzero for a MEM operand whose entire address needs a reload. */
+ /* Nonzero for a MEM operand whose entire address needs a reload.
+ May be -1 to indicate the entire address may or may not need a reload. */
int address_reloaded[MAX_RECOG_OPERANDS];
- /* Nonzero for an address operand that needs to be completely reloaded. */
+ /* Nonzero for an address operand that needs to be completely reloaded.
+ May be -1 to indicate the entire operand may or may not need a reload. */
int address_operand_reloaded[MAX_RECOG_OPERANDS];
/* Value of enum reload_type to use for operand. */
enum reload_type operand_type[MAX_RECOG_OPERANDS];
/* JUMP_INSNs and CALL_INSNs are not allowed to have any output reloads;
neither are insns that SET cc0. Insns that use CC0 are not allowed
to have any input reloads. */
- if (GET_CODE (insn) == JUMP_INSN || GET_CODE (insn) == CALL_INSN)
+ if (JUMP_P (insn) || CALL_P (insn))
no_output_reloads = 1;
#ifdef HAVE_cc0
/* The eliminated forms of any secondary memory locations are per-insn, so
clear them out here. */
- memset ((char *) secondary_memlocs_elim, 0, sizeof secondary_memlocs_elim);
+ if (secondary_memlocs_elim_used)
+ {
+ memset (secondary_memlocs_elim, 0,
+ sizeof (secondary_memlocs_elim[0]) * secondary_memlocs_elim_used);
+ secondary_memlocs_elim_used = 0;
+ }
#endif
/* Dispose quickly of (set (reg..) (reg..)) if both have hard regs and it
is cheap to move between them. If it is not, there may not be an insn
to do the copy, so we may need a reload. */
if (GET_CODE (body) == SET
- && GET_CODE (SET_DEST (body)) == REG
+ && REG_P (SET_DEST (body))
&& REGNO (SET_DEST (body)) < FIRST_PSEUDO_REGISTER
- && GET_CODE (SET_SRC (body)) == REG
+ && REG_P (SET_SRC (body))
&& REGNO (SET_SRC (body)) < FIRST_PSEUDO_REGISTER
&& REGISTER_MOVE_COST (GET_MODE (SET_SRC (body)),
REGNO_REG_CLASS (REGNO (SET_SRC (body))),
while ((c = *p))
{
p += CONSTRAINT_LEN (c, p);
- if (c == '=')
- modified[i] = RELOAD_WRITE;
- else if (c == '+')
- modified[i] = RELOAD_READ_WRITE;
- else if (c == '%')
+ switch (c)
{
- /* The last operand should not be marked commutative. */
- if (i == noperands - 1)
- abort ();
-
- commutative = i;
- }
- else if (ISDIGIT (c))
- {
- c = strtoul (p - 1, &p, 10);
+ case '=':
+ modified[i] = RELOAD_WRITE;
+ break;
+ case '+':
+ modified[i] = RELOAD_READ_WRITE;
+ break;
+ case '%':
+ {
+ /* The last operand should not be marked commutative. */
+ gcc_assert (i != noperands - 1);
+
+ /* We currently only support one commutative pair of
+ operands. Some existing asm code currently uses more
+ than one pair. Previously, that would usually work,
+ but sometimes it would crash the compiler. We
+ continue supporting that case as well as we can by
+ silently ignoring all but the first pair. In the
+ future we may handle it correctly. */
+ if (commutative < 0)
+ commutative = i;
+ else
+ gcc_assert (this_insn_is_asm);
+ }
+ break;
+ /* Use of ISDIGIT is tempting here, but it may get expensive because
+ of locale support we don't want. */
+ case '0': case '1': case '2': case '3': case '4':
+ case '5': case '6': case '7': case '8': case '9':
+ {
+ c = strtoul (p - 1, &p, 10);
- operands_match[c][i]
- = operands_match_p (recog_data.operand[c],
- recog_data.operand[i]);
+ operands_match[c][i]
+ = operands_match_p (recog_data.operand[c],
+ recog_data.operand[i]);
- /* An operand may not match itself. */
- if (c == i)
- abort ();
+ /* An operand may not match itself. */
+ gcc_assert (c != i);
- /* If C can be commuted with C+1, and C might need to match I,
- then C+1 might also need to match I. */
- if (commutative >= 0)
- {
- if (c == commutative || c == commutative + 1)
- {
- int other = c + (c == commutative ? 1 : -1);
- operands_match[other][i]
- = operands_match_p (recog_data.operand[other],
- recog_data.operand[i]);
- }
- if (i == commutative || i == commutative + 1)
- {
- int other = i + (i == commutative ? 1 : -1);
- operands_match[c][other]
- = operands_match_p (recog_data.operand[c],
- recog_data.operand[other]);
- }
- /* Note that C is supposed to be less than I.
- No need to consider altering both C and I because in
- that case we would alter one into the other. */
- }
+ /* If C can be commuted with C+1, and C might need to match I,
+ then C+1 might also need to match I. */
+ if (commutative >= 0)
+ {
+ if (c == commutative || c == commutative + 1)
+ {
+ int other = c + (c == commutative ? 1 : -1);
+ operands_match[other][i]
+ = operands_match_p (recog_data.operand[other],
+ recog_data.operand[i]);
+ }
+ if (i == commutative || i == commutative + 1)
+ {
+ int other = i + (i == commutative ? 1 : -1);
+ operands_match[c][other]
+ = operands_match_p (recog_data.operand[c],
+ recog_data.operand[other]);
+ }
+ /* Note that C is supposed to be less than I.
+ No need to consider altering both C and I because in
+ that case we would alter one into the other. */
+ }
+ }
}
}
}
/* If we now have a simple operand where we used to have a
PLUS or MULT, re-recognize and try again. */
- if ((GET_RTX_CLASS (GET_CODE (*recog_data.operand_loc[i])) == 'o'
+ if ((OBJECT_P (*recog_data.operand_loc[i])
|| GET_CODE (*recog_data.operand_loc[i]) == SUBREG)
&& (GET_CODE (recog_data.operand[i]) == MULT
|| GET_CODE (recog_data.operand[i]) == PLUS))
wider reload. */
if (replace
- && GET_CODE (op) == MEM
- && GET_CODE (reg) == REG
+ && MEM_P (op)
+ && REG_P (reg)
&& (GET_MODE_SIZE (GET_MODE (reg))
>= GET_MODE_SIZE (GET_MODE (op))))
set_unique_reg_note (emit_insn_before (gen_rtx_USE (VOIDmode, reg),
substed_operand[i] = recog_data.operand[i] = op;
}
- else if (code == PLUS || GET_RTX_CLASS (code) == '1')
+ else if (code == PLUS || GET_RTX_CLASS (code) == RTX_UNARY)
/* We can get a PLUS as an "operand" as a result of register
elimination. See eliminate_regs and gen_reload. We handle
a unary operator by reloading the operand. */
/* If the predicate accepts a unary operator, it means that
we need to reload the operand, but do not do this for
match_operator and friends. */
- if (GET_RTX_CLASS (GET_CODE (operand)) == '1' && *p != 0)
+ if (UNARY_P (operand) && *p != 0)
operand = XEXP (operand, 0);
/* If the operand is a SUBREG, extract
it is a hard reg. This is because it is passed
to reg_fits_class_p if it is a REG and all pseudos
return 0 from that function. */
- if (GET_CODE (SUBREG_REG (operand)) == REG
+ if (REG_P (SUBREG_REG (operand))
&& REGNO (SUBREG_REG (operand)) < FIRST_PSEUDO_REGISTER)
{
if (!subreg_offset_representable_p
This is doubly true if WORD_REGISTER_OPERATIONS. In
this case eliminate_regs has left non-paradoxical
- subregs for push_reloads to see. Make sure it does
+ subregs for push_reload to see. Make sure it does
by forcing the reload.
??? When is it right at this stage to have a subreg
of a mem that is _not_ to be handled specially? IMO
those should have been reduced to just a mem. */
- || ((GET_CODE (operand) == MEM
- || (GET_CODE (operand)== REG
+ || ((MEM_P (operand)
+ || (REG_P (operand)
&& REGNO (operand) >= FIRST_PSEUDO_REGISTER))
#ifndef WORD_REGISTER_OPERATIONS
&& (((GET_MODE_BITSIZE (GET_MODE (operand))
< BIGGEST_ALIGNMENT)
&& (GET_MODE_SIZE (operand_mode[i])
> GET_MODE_SIZE (GET_MODE (operand))))
- || (GET_CODE (operand) == MEM && BYTES_BIG_ENDIAN)
+ || BYTES_BIG_ENDIAN
#ifdef LOAD_EXTEND_OP
|| (GET_MODE_SIZE (operand_mode[i]) <= UNITS_PER_WORD
&& (GET_MODE_SIZE (GET_MODE (operand))
&& (GET_MODE_SIZE (operand_mode[i])
> GET_MODE_SIZE (GET_MODE (operand)))
&& INTEGRAL_MODE_P (GET_MODE (operand))
- && LOAD_EXTEND_OP (GET_MODE (operand)) != NIL)
+ && LOAD_EXTEND_OP (GET_MODE (operand)) != UNKNOWN)
#endif
)
#endif
break;
case '%':
- /* The last operand should not be marked commutative. */
- if (i != noperands - 1)
- commutative = i;
+ /* We only support one commutative marker, the first
+ one. We already set commutative above. */
break;
case '?':
offsettable address was expected, then we must reject
this combination, because we can't reload it. */
if (this_alternative_offmemok[m]
- && GET_CODE (recog_data.operand[m]) == MEM
+ && MEM_P (recog_data.operand[m])
&& this_alternative[m] == (int) NO_REGS
&& ! this_alternative_win[m])
bad = 1;
{
/* Operands don't match. */
rtx value;
+ int loc1, loc2;
/* Retroactively mark the operand we had to match
as a loser, if it wasn't already. */
if (this_alternative_win[m])
if (this_alternative[m] == (int) NO_REGS)
bad = 1;
/* But count the pair only once in the total badness of
- this alternative, if the pair can be a dummy reload. */
+ this alternative, if the pair can be a dummy reload.
+ The pointers in operand_loc are not swapped; swap
+ them by hand if necessary. */
+ if (swapped && i == commutative)
+ loc1 = commutative + 1;
+ else if (swapped && i == commutative + 1)
+ loc1 = commutative;
+ else
+ loc1 = i;
+ if (swapped && m == commutative)
+ loc2 = commutative + 1;
+ else if (swapped && m == commutative + 1)
+ loc2 = commutative;
+ else
+ loc2 = m;
value
= find_dummy_reload (recog_data.operand[i],
recog_data.operand[m],
- recog_data.operand_loc[i],
- recog_data.operand_loc[m],
+ recog_data.operand_loc[loc1],
+ recog_data.operand_loc[loc2],
operand_mode[i], operand_mode[m],
this_alternative[m], -1,
this_alternative_earlyclobber[m]);
case 'p':
/* All necessary reloads for an address_operand
were handled in find_reloads_address. */
- this_alternative[i] = (int) MODE_BASE_REG_CLASS (VOIDmode);
+ this_alternative[i]
+ = (int) base_reg_class (VOIDmode, ADDRESS, SCRATCH);
win = 1;
badop = 0;
break;
case 'm':
if (force_reload)
break;
- if (GET_CODE (operand) == MEM
- || (GET_CODE (operand) == REG
+ if (MEM_P (operand)
+ || (REG_P (operand)
&& REGNO (operand) >= FIRST_PSEUDO_REGISTER
&& reg_renumber[REGNO (operand)] < 0))
win = 1;
- if (CONSTANT_P (operand)
- /* force_const_mem does not accept HIGH. */
- && GET_CODE (operand) != HIGH)
+ if (CONST_POOL_OK_P (operand))
badop = 0;
constmemok = 1;
break;
case '<':
- if (GET_CODE (operand) == MEM
+ if (MEM_P (operand)
&& ! address_reloaded[i]
&& (GET_CODE (XEXP (operand, 0)) == PRE_DEC
|| GET_CODE (XEXP (operand, 0)) == POST_DEC))
break;
case '>':
- if (GET_CODE (operand) == MEM
+ if (MEM_P (operand)
&& ! address_reloaded[i]
&& (GET_CODE (XEXP (operand, 0)) == PRE_INC
|| GET_CODE (XEXP (operand, 0)) == POST_INC))
case 'V':
if (force_reload)
break;
- if (GET_CODE (operand) == MEM
+ if (MEM_P (operand)
&& ! (ind_levels ? offsettable_memref_p (operand)
: offsettable_nonstrict_memref_p (operand))
/* Certain mem addresses will become offsettable
after they themselves are reloaded. This is important;
we don't want our own handling of unoffsettables
to override the handling of reg_equiv_address. */
- && !(GET_CODE (XEXP (operand, 0)) == REG
+ && !(REG_P (XEXP (operand, 0))
&& (ind_levels == 0
|| reg_equiv_address[REGNO (XEXP (operand, 0))] != 0)))
win = 1;
case 'o':
if (force_reload)
break;
- if ((GET_CODE (operand) == MEM
+ if ((MEM_P (operand)
/* If IND_LEVELS, find_reloads_address won't reload a
pseudo that didn't get a hard reg, so we have to
reject that case. */
: offsettable_nonstrict_memref_p (operand))
/* A reloaded address is offsettable because it is now
just a simple register indirect. */
- || address_reloaded[i]))
- || (GET_CODE (operand) == REG
+ || address_reloaded[i] == 1))
+ || (REG_P (operand)
&& REGNO (operand) >= FIRST_PSEUDO_REGISTER
&& reg_renumber[REGNO (operand)] < 0
/* If reg_equiv_address is nonzero, we will be
&& offsettable_memref_p (reg_equiv_mem[REGNO (operand)]))
|| (reg_equiv_address[REGNO (operand)] != 0))))
win = 1;
- /* force_const_mem does not accept HIGH. */
- if ((CONSTANT_P (operand) && GET_CODE (operand) != HIGH)
- || GET_CODE (operand) == MEM)
+ if (CONST_POOL_OK_P (operand)
+ || MEM_P (operand))
badop = 0;
constmemok = 1;
offmemok = 1;
break;
case 'i':
if (CONSTANT_P (operand)
-#ifdef LEGITIMATE_PIC_OPERAND_P
- && (! flag_pic || LEGITIMATE_PIC_OPERAND_P (operand))
-#endif
- )
+ && (! flag_pic || LEGITIMATE_PIC_OPERAND_P (operand)))
win = 1;
break;
break;
case 'X':
+ force_reload = 0;
win = 1;
break;
&& GET_CODE (operand) != PLUS
/* A SCRATCH is not a valid operand. */
&& GET_CODE (operand) != SCRATCH
-#ifdef LEGITIMATE_PIC_OPERAND_P
&& (! CONSTANT_P (operand)
|| ! flag_pic
|| LEGITIMATE_PIC_OPERAND_P (operand))
-#endif
&& (GENERAL_REGS == ALL_REGS
- || GET_CODE (operand) != REG
+ || !REG_P (operand)
|| (REGNO (operand) >= FIRST_PSEUDO_REGISTER
&& reg_renumber[REGNO (operand)] < 0)))
win = 1;
win = 1;
/* If the address was already reloaded,
we win as well. */
- if (GET_CODE (operand) == MEM && address_reloaded[i])
+ else if (MEM_P (operand)
+ && address_reloaded[i] == 1)
win = 1;
/* Likewise if the address will be reloaded because
reg_equiv_address is nonzero. For reg_equiv_mem
we have to check. */
- if (GET_CODE (operand) == REG
- && REGNO (operand) >= FIRST_PSEUDO_REGISTER
- && reg_renumber[REGNO (operand)] < 0
- && ((reg_equiv_mem[REGNO (operand)] != 0
- && EXTRA_CONSTRAINT_STR (reg_equiv_mem[REGNO (operand)], c, p))
- || (reg_equiv_address[REGNO (operand)] != 0)))
+ else if (REG_P (operand)
+ && REGNO (operand) >= FIRST_PSEUDO_REGISTER
+ && reg_renumber[REGNO (operand)] < 0
+ && ((reg_equiv_mem[REGNO (operand)] != 0
+ && EXTRA_CONSTRAINT_STR (reg_equiv_mem[REGNO (operand)], c, p))
+ || (reg_equiv_address[REGNO (operand)] != 0)))
win = 1;
/* If we didn't already win, we can reload
constants via force_const_mem, and other
MEMs by reloading the address like for 'o'. */
- if ((CONSTANT_P (operand) && GET_CODE (operand) != HIGH)
- || GET_CODE (operand) == MEM)
+ if (CONST_POOL_OK_P (operand)
+ || MEM_P (operand))
badop = 0;
constmemok = 1;
offmemok = 1;
/* If we didn't already win, we can reload
the address into a base register. */
- this_alternative[i] = (int) MODE_BASE_REG_CLASS (VOIDmode);
+ this_alternative[i]
+ = (int) base_reg_class (VOIDmode, ADDRESS, SCRATCH);
badop = 0;
break;
}
if (GET_MODE (operand) == BLKmode)
break;
winreg = 1;
- if (GET_CODE (operand) == REG
+ if (REG_P (operand)
&& reg_fits_class_p (operand, this_alternative[i],
offset, GET_MODE (recog_data.operand[i])))
win = 1;
if (badop)
bad = 1;
/* Alternative loses if it has no regs for a reg operand. */
- if (GET_CODE (operand) == REG
+ if (REG_P (operand)
&& this_alternative[i] == (int) NO_REGS
&& this_alternative_matches[i] < 0)
bad = 1;
an early reload pass. Note that the test here is
precisely the same as in the code below that calls
force_const_mem. */
- if (CONSTANT_P (operand)
- /* force_const_mem does not accept HIGH. */
- && GET_CODE (operand) != HIGH
+ if (CONST_POOL_OK_P (operand)
&& ((PREFERRED_RELOAD_CLASS (operand,
(enum reg_class) this_alternative[i])
== NO_REGS)
losers++;
}
- /* If we can't reload this value at all, reject this
- alternative. Note that we could also lose due to
- LIMIT_RELOAD_RELOAD_CLASS, but we don't check that
- here. */
-
- if (! CONSTANT_P (operand)
- && (enum reg_class) this_alternative[i] != NO_REGS
- && (PREFERRED_RELOAD_CLASS (operand,
- (enum reg_class) this_alternative[i])
- == NO_REGS))
- bad = 1;
-
/* Alternative loses if it requires a type of reload not
permitted for this insn. We can always reload SCRATCH
and objects with a REG_UNUSED note. */
- else if (GET_CODE (operand) != SCRATCH
+ if (GET_CODE (operand) != SCRATCH
&& modified[i] != RELOAD_READ && no_output_reloads
&& ! find_reg_note (insn, REG_UNUSED, operand))
bad = 1;
&& ! const_to_mem)
bad = 1;
+ /* If we can't reload this value at all, reject this
+ alternative. Note that we could also lose due to
+ LIMIT_RELOAD_CLASS, but we don't check that
+ here. */
+
+ if (! CONSTANT_P (operand)
+ && (enum reg_class) this_alternative[i] != NO_REGS)
+ {
+ if (PREFERRED_RELOAD_CLASS
+ (operand, (enum reg_class) this_alternative[i])
+ == NO_REGS)
+ reject = 600;
+
+#ifdef PREFERRED_OUTPUT_RELOAD_CLASS
+ if (operand_type[i] == RELOAD_FOR_OUTPUT
+ && PREFERRED_OUTPUT_RELOAD_CLASS
+ (operand, (enum reg_class) this_alternative[i])
+ == NO_REGS)
+ reject = 600;
+#endif
+ }
+
/* We prefer to reload pseudos over reloading other things,
since such reloads may be able to be eliminated later.
If we are reloading a SCRATCH, we won't be generating any
case where we are forcing a constant into memory and
it will then win since we don't want to have a different
alternative match then. */
- if (! (GET_CODE (operand) == REG
+ if (! (REG_P (operand)
&& REGNO (operand) >= FIRST_PSEUDO_REGISTER)
&& GET_CODE (operand) != SCRATCH
&& ! (const_to_mem && constmemok))
if (! win && ! did_match
&& this_alternative[i] != (int) NO_REGS
&& GET_MODE_SIZE (operand_mode[i]) <= UNITS_PER_WORD
- && reg_class_size[(int) preferred_class[i]] > 1)
+ && reg_class_size [(int) preferred_class[i]] > 0
+ && ! SMALL_REGISTER_CLASS_P (preferred_class[i]))
{
if (! reg_class_subset_p (this_alternative[i],
preferred_class[i]))
early_data = decompose (recog_data.operand[i]);
- if (modified[i] == RELOAD_READ)
- abort ();
+ gcc_assert (modified[i] != RELOAD_READ);
if (this_alternative[i] == NO_REGS)
{
this_alternative_earlyclobber[i] = 0;
- if (this_insn_is_asm)
- error_for_asm (this_insn,
- "`&' constraint used with no register class");
- else
- abort ();
+ gcc_assert (this_insn_is_asm);
+ error_for_asm (this_insn,
+ "%<&%> constraint used with no register class");
}
for (j = 0; j < noperands; j++)
/* Is this an input operand or a memory ref? */
- if ((GET_CODE (recog_data.operand[j]) == MEM
+ if ((MEM_P (recog_data.operand[j])
|| modified[j] != RELOAD_WRITE)
&& j != i
/* Ignore things like match_operator operands. */
&& !immune_p (recog_data.operand[j], recog_data.operand[i],
early_data))
{
- /* If the output is in a single-reg class,
+ /* If the output is in a non-empty few-regs class,
it's costly to reload it, so reload the input instead. */
- if (reg_class_size[this_alternative[i]] == 1
- && (GET_CODE (recog_data.operand[j]) == REG
+ if (SMALL_REGISTER_CLASS_P (this_alternative[i])
+ && (REG_P (recog_data.operand[j])
|| GET_CODE (recog_data.operand[j]) == SUBREG))
{
losers++;
pref_or_nothing[commutative] = pref_or_nothing[commutative + 1];
pref_or_nothing[commutative + 1] = t;
+ t = address_reloaded[commutative];
+ address_reloaded[commutative] = address_reloaded[commutative + 1];
+ address_reloaded[commutative + 1] = t;
+
memcpy (constraints, recog_data.constraints,
noperands * sizeof (char *));
goto try_swapped;
/* No alternative works with reloads?? */
if (insn_code_number >= 0)
fatal_insn ("unable to generate reloads for:", insn);
- error_for_asm (insn, "inconsistent operand constraints in an `asm'");
+ error_for_asm (insn, "inconsistent operand constraints in an %<asm%>");
/* Avoid further trouble with this insn. */
PATTERN (insn) = gen_rtx_USE (VOIDmode, const0_rtx);
n_reloads = 0;
into registers are here changed into memory references. */
for (i = 0; i < noperands; i++)
if (! goal_alternative_win[i]
- && CONSTANT_P (recog_data.operand[i])
- /* force_const_mem does not accept HIGH. */
- && GET_CODE (recog_data.operand[i]) != HIGH
+ && CONST_POOL_OK_P (recog_data.operand[i])
&& ((PREFERRED_RELOAD_CLASS (recog_data.operand[i],
(enum reg_class) goal_alternative[i])
== NO_REGS)
goal_alternative_win[i] = 1;
}
+ /* Likewise any invalid constants appearing as operand of a PLUS
+ that is to be reloaded. */
+ for (i = 0; i < noperands; i++)
+ if (! goal_alternative_win[i]
+ && GET_CODE (recog_data.operand[i]) == PLUS
+ && CONST_POOL_OK_P (XEXP (recog_data.operand[i], 1))
+ && (PREFERRED_RELOAD_CLASS (XEXP (recog_data.operand[i], 1),
+ (enum reg_class) goal_alternative[i])
+ == NO_REGS)
+ && operand_mode[i] != VOIDmode)
+ {
+ rtx tem = force_const_mem (operand_mode[i],
+ XEXP (recog_data.operand[i], 1));
+ tem = gen_rtx_PLUS (operand_mode[i],
+ XEXP (recog_data.operand[i], 0), tem);
+
+ substed_operand[i] = recog_data.operand[i]
+ = find_reloads_toplev (tem, i, address_type[i],
+ ind_levels, 0, insn, NULL);
+ }
+
/* Record the values of the earlyclobber operands for the caller. */
if (goal_earlyclobber)
for (i = 0; i < noperands; i++)
so we don't bother with it. It may not be worth doing. */
else if (goal_alternative_matched[i] == -1
&& goal_alternative_offmemok[i]
- && GET_CODE (recog_data.operand[i]) == MEM)
+ && MEM_P (recog_data.operand[i]))
{
+ /* If the address to be reloaded is a VOIDmode constant,
+ use Pmode as mode of the reload register, as would have
+ been done by find_reloads_address. */
+ enum machine_mode address_mode;
+ address_mode = GET_MODE (XEXP (recog_data.operand[i], 0));
+ if (address_mode == VOIDmode)
+ address_mode = Pmode;
+
operand_reloadnum[i]
= push_reload (XEXP (recog_data.operand[i], 0), NULL_RTX,
&XEXP (recog_data.operand[i], 0), (rtx*) 0,
- MODE_BASE_REG_CLASS (VOIDmode),
- GET_MODE (XEXP (recog_data.operand[i], 0)),
+ base_reg_class (VOIDmode, MEM, SCRATCH),
+ address_mode,
VOIDmode, 0, 0, i, RELOAD_FOR_INPUT);
rld[operand_reloadnum[i]].inc
= GET_MODE_SIZE (GET_MODE (recog_data.operand[i]));
0, 0, i, RELOAD_OTHER);
operand_reloadnum[i] = output_reloadnum;
}
- else if (insn_code_number >= 0)
- abort ();
else
{
- error_for_asm (insn, "inconsistent operand constraints in an `asm'");
+ gcc_assert (insn_code_number < 0);
+ error_for_asm (insn, "inconsistent operand constraints "
+ "in an %<asm%>");
/* Avoid further trouble with this insn. */
PATTERN (insn) = gen_rtx_USE (VOIDmode, const0_rtx);
n_reloads = 0;
}
else if (goal_alternative_matched[i] < 0
&& goal_alternative_matches[i] < 0
- && !address_operand_reloaded[i]
+ && address_operand_reloaded[i] != 1
&& optimize)
{
/* For each non-matching operand that's a MEM or a pseudo-register
while (GET_CODE (operand) == SUBREG)
operand = SUBREG_REG (operand);
- if ((GET_CODE (operand) == MEM
- || (GET_CODE (operand) == REG
+ if ((MEM_P (operand)
+ || (REG_P (operand)
&& REGNO (operand) >= FIRST_PSEUDO_REGISTER))
/* If this is only for an output, the optional reload would not
actually cause us to use a register now, just note that
we then need to emit a USE and/or a CLOBBER so that reload
inheritance will do the right thing. */
else if (replace
- && (GET_CODE (operand) == MEM
- || (GET_CODE (operand) == REG
+ && (MEM_P (operand)
+ || (REG_P (operand)
&& REGNO (operand) >= FIRST_PSEUDO_REGISTER
&& reg_renumber [REGNO (operand)] < 0)))
{
while (GET_CODE (operand) == SUBREG)
operand = SUBREG_REG (operand);
- if (GET_CODE (operand) == REG)
+ if (REG_P (operand))
{
if (modified[i] != RELOAD_WRITE)
/* We mark the USE with QImode so that we recognize
while (GET_CODE (operand) == SUBREG)
operand = SUBREG_REG (operand);
- if ((GET_CODE (operand) == MEM
- || (GET_CODE (operand) == REG
+ if ((MEM_P (operand)
+ || (REG_P (operand)
&& REGNO (operand) >= FIRST_PSEUDO_REGISTER))
&& ((enum reg_class) goal_alternative[goal_alternative_matches[i]]
!= NO_REGS))
{
/* We only do this on the last pass through reload, because it is
possible for some data (like reg_equiv_address) to be changed during
- later passes. Moreover, we loose the opportunity to get a useful
+ later passes. Moreover, we lose the opportunity to get a useful
reload_{in,out}_reg when we do these replacements. */
if (replace)
/* If we're replacing an operand with a LABEL_REF, we need
to make sure that there's a REG_LABEL note attached to
this instruction. */
- if (GET_CODE (insn) != JUMP_INSN
+ if (!JUMP_P (insn)
&& GET_CODE (substitution) == LABEL_REF
&& !find_reg_note (insn, REG_LABEL, XEXP (substitution, 0)))
REG_NOTES (insn) = gen_rtx_INSN_LIST (REG_LABEL,
for (i = 0; i < n_reloads; i++)
if (rld[i].reg_rtx == 0
&& rld[i].in != 0
- && GET_CODE (rld[i].in) == REG
+ && REG_P (rld[i].in)
&& rld[i].out == 0)
{
rld[i].reg_rtx
}
#endif
+ /* If we detected error and replaced asm instruction by USE, forget about the
+ reloads. */
+ if (GET_CODE (PATTERN (insn)) == USE
+ && GET_CODE (XEXP (PATTERN (insn), 0)) == CONST_INT)
+ n_reloads = 0;
+
/* Perhaps an output reload can be combined with another
to reduce needs by one. */
if (!goal_earlyclobber)
do after the insn (such as for output addresses) are fine. */
if (no_input_reloads)
for (i = 0; i < n_reloads; i++)
- if (rld[i].in != 0
- && rld[i].when_needed != RELOAD_FOR_OUTADDR_ADDRESS
- && rld[i].when_needed != RELOAD_FOR_OUTPUT_ADDRESS)
- abort ();
+ gcc_assert (rld[i].in == 0
+ || rld[i].when_needed == RELOAD_FOR_OUTADDR_ADDRESS
+ || rld[i].when_needed == RELOAD_FOR_OUTPUT_ADDRESS);
#endif
/* Compute reload_mode and reload_nregs. */
for (i = 0; i < n_reloads; i++)
if (rld[i].when_needed == RELOAD_FOR_INPUT
&& GET_CODE (PATTERN (insn)) == SET
- && GET_CODE (SET_DEST (PATTERN (insn))) == REG
- && SET_SRC (PATTERN (insn)) == rld[i].in)
+ && REG_P (SET_DEST (PATTERN (insn)))
+ && SET_SRC (PATTERN (insn)) == rld[i].in)
{
- rtx dest = SET_DEST (PATTERN (insn));
+ rtx dest = SET_DEST (PATTERN (insn));
unsigned int regno = REGNO (dest);
- if (regno < FIRST_PSEUDO_REGISTER
- && TEST_HARD_REG_BIT (reg_class_contents[rld[i].class], regno)
- && HARD_REGNO_MODE_OK (regno, rld[i].mode))
- rld[i].reg_rtx = dest;
+ if (regno < FIRST_PSEUDO_REGISTER
+ && TEST_HARD_REG_BIT (reg_class_contents[rld[i].class], regno)
+ && HARD_REGNO_MODE_OK (regno, rld[i].mode))
+ {
+ int nr = hard_regno_nregs[regno][rld[i].mode];
+ int ok = 1, nri;
+
+ for (nri = 1; nri < nr; nri ++)
+ if (! TEST_HARD_REG_BIT (reg_class_contents[rld[i].class], regno + nri))
+ ok = 0;
+
+ if (ok)
+ rld[i].reg_rtx = dest;
+ }
}
return retval;
accepts a memory operand with constant address. */
static int
-alternative_allows_memconst (constraint, altnum)
- const char *constraint;
- int altnum;
+alternative_allows_memconst (const char *constraint, int altnum)
{
int c;
/* Skip alternatives before the one requested. */
result of find_reloads_address. */
static rtx
-find_reloads_toplev (x, opnum, type, ind_levels, is_set_dest, insn,
- address_reloaded)
- rtx x;
- int opnum;
- enum reload_type type;
- int ind_levels;
- int is_set_dest;
- rtx insn;
- int *address_reloaded;
+find_reloads_toplev (rtx x, int opnum, enum reload_type type,
+ int ind_levels, int is_set_dest, rtx insn,
+ int *address_reloaded)
{
RTX_CODE code = GET_CODE (x);
x = mem;
i = find_reloads_address (GET_MODE (x), &x, XEXP (x, 0), &XEXP (x, 0),
opnum, type, ind_levels, insn);
+ if (x != mem)
+ push_reg_equiv_alt_mem (regno, x);
if (address_reloaded)
*address_reloaded = i;
}
return tem;
}
- if (code == SUBREG && GET_CODE (SUBREG_REG (x)) == REG)
+ if (code == SUBREG && REG_P (SUBREG_REG (x)))
{
- /* Check for SUBREG containing a REG that's equivalent to a constant.
- If the constant has a known value, truncate it right now.
- Similarly if we are extracting a single-word of a multi-word
- constant. If the constant is symbolic, allow it to be substituted
- normally. push_reload will strip the subreg later. If the
- constant is VOIDmode, abort because we will lose the mode of
- the register (this should never happen because one of the cases
- above should handle it). */
+ /* Check for SUBREG containing a REG that's equivalent to a
+ constant. If the constant has a known value, truncate it
+ right now. Similarly if we are extracting a single-word of a
+ multi-word constant. If the constant is symbolic, allow it
+ to be substituted normally. push_reload will strip the
+ subreg later. The constant must not be VOIDmode, because we
+ will lose the mode of the register (this should never happen
+ because one of the cases above should handle it). */
int regno = REGNO (SUBREG_REG (x));
rtx tem;
if (subreg_lowpart_p (x)
- && regno >= FIRST_PSEUDO_REGISTER && reg_renumber[regno] < 0
+ && regno >= FIRST_PSEUDO_REGISTER
+ && reg_renumber[regno] < 0
&& reg_equiv_constant[regno] != 0
&& (tem = gen_lowpart_common (GET_MODE (x),
reg_equiv_constant[regno])) != 0)
return tem;
- if (regno >= FIRST_PSEUDO_REGISTER && reg_renumber[regno] < 0
+ if (regno >= FIRST_PSEUDO_REGISTER
+ && reg_renumber[regno] < 0
&& reg_equiv_constant[regno] != 0)
{
tem =
simplify_gen_subreg (GET_MODE (x), reg_equiv_constant[regno],
GET_MODE (SUBREG_REG (x)), SUBREG_BYTE (x));
- if (!tem)
- abort ();
+ gcc_assert (tem);
return tem;
}
a wider mode if we have a paradoxical SUBREG. find_reloads will
force a reload in that case. So we should not do anything here. */
- else if (regno >= FIRST_PSEUDO_REGISTER
+ if (regno >= FIRST_PSEUDO_REGISTER
#ifdef LOAD_EXTEND_OP
&& (GET_MODE_SIZE (GET_MODE (x))
<= GET_MODE_SIZE (GET_MODE (SUBREG_REG (x))))
This mem ref is not shared with anything. */
static rtx
-make_memloc (ad, regno)
- rtx ad;
- int regno;
+make_memloc (rtx ad, int regno)
{
/* We must rerun eliminate_regs, in case the elimination
offsets have changed. */
}
/* Returns true if AD could be turned into a valid memory reference
- to mode MODE by reloading the part pointed to by PART into a
+ to mode MODE by reloading the part pointed to by PART into a
register. */
static int
-maybe_memory_address_p (mode, ad, part)
- enum machine_mode mode;
- rtx ad;
- rtx *part;
+maybe_memory_address_p (enum machine_mode mode, rtx ad, rtx *part)
{
int retv;
rtx tem = *part;
to determine if we may generate output reloads, and where to put USEs
for pseudos that we have to replace with stack slots.
- Value is nonzero if this address is reloaded or replaced as a whole.
- This is interesting to the caller if the address is an autoincrement.
+ Value is one if this address is reloaded or replaced as a whole; it is
+ zero if the top level of this address was not reloaded or replaced, and
+ it is -1 if it may or may not have been reloaded or replaced.
Note that there is no verification that the address will be valid after
this routine does its work. Instead, we rely on the fact that the address
to a hard register, and frame pointer elimination. */
static int
-find_reloads_address (mode, memrefloc, ad, loc, opnum, type, ind_levels, insn)
- enum machine_mode mode;
- rtx *memrefloc;
- rtx ad;
- rtx *loc;
- int opnum;
- enum reload_type type;
- int ind_levels;
- rtx insn;
+find_reloads_address (enum machine_mode mode, rtx *memrefloc, rtx ad,
+ rtx *loc, int opnum, enum reload_type type,
+ int ind_levels, rtx insn)
{
int regno;
int removed_and = 0;
+ int op_index;
rtx tem;
/* If the address is a register, see if it is a legitimate address and
reload if not. We first handle the cases where we need not reload
or where we must reload in a non-standard way. */
- if (GET_CODE (ad) == REG)
+ if (REG_P (ad))
{
regno = REGNO (ad);
tem = make_memloc (ad, regno);
if (! strict_memory_address_p (GET_MODE (tem), XEXP (tem, 0)))
{
+ rtx orig = tem;
+
find_reloads_address (GET_MODE (tem), &tem, XEXP (tem, 0),
&XEXP (tem, 0), opnum,
ADDR_TYPE (type), ind_levels, insn);
+ if (tem != orig)
+ push_reg_equiv_alt_mem (regno, tem);
}
/* We can avoid a reload if the register's equivalent memory
expression is valid as an indirect memory address.
if (ind_levels > 0
&& strict_memory_address_p (mode, tem)
- && (GET_CODE (XEXP (tem, 0)) == REG
+ && (REG_P (XEXP (tem, 0))
|| (GET_CODE (XEXP (tem, 0)) == PLUS
- && GET_CODE (XEXP (XEXP (tem, 0), 0)) == REG
+ && REG_P (XEXP (XEXP (tem, 0), 0))
&& CONSTANT_P (XEXP (XEXP (tem, 0), 1)))))
{
/* TEM is not the same as what we'll be replacing the
subject of a CLOBBER in this insn. */
else if (regno < FIRST_PSEUDO_REGISTER
- && REGNO_MODE_OK_FOR_BASE_P (regno, mode)
+ && regno_ok_for_base_p (regno, mode, MEM, SCRATCH)
&& ! regno_clobbered_p (regno, this_insn, mode, 0))
return 0;
/* If we do not have one of the cases above, we must do the reload. */
- push_reload (ad, NULL_RTX, loc, (rtx*) 0, MODE_BASE_REG_CLASS (mode),
+ push_reload (ad, NULL_RTX, loc, (rtx*) 0, base_reg_class (mode, MEM, SCRATCH),
GET_MODE (ad), VOIDmode, 0, 0, opnum, type);
return 1;
}
/* But first quickly dispose of a common case. */
if (GET_CODE (ad) == PLUS
&& GET_CODE (XEXP (ad, 1)) == CONST_INT
- && GET_CODE (XEXP (ad, 0)) == REG
+ && REG_P (XEXP (ad, 0))
&& reg_equiv_constant[REGNO (XEXP (ad, 0))] == 0)
return 0;
*memrefloc = copy_rtx (*memrefloc);
XEXP (*memrefloc, 0) = ad;
move_replacements (&ad, &XEXP (*memrefloc, 0));
- return 1;
+ return -1;
}
while (0);
#endif
frame and stack pointers is not its initial value. In that case the
pseudo will have been replaced by a MEM referring to the
stack pointer. */
- if (GET_CODE (ad) == MEM)
+ if (MEM_P (ad))
{
/* First ensure that the address in this MEM is valid. Then, unless
indirect addresses are valid, reload the MEM into a register. */
if (ind_levels == 0
|| (GET_CODE (XEXP (tem, 0)) == SYMBOL_REF && ! indirect_symref_ok)
- || GET_CODE (XEXP (tem, 0)) == MEM
- || ! (GET_CODE (XEXP (tem, 0)) == REG
+ || MEM_P (XEXP (tem, 0))
+ || ! (REG_P (XEXP (tem, 0))
|| (GET_CODE (XEXP (tem, 0)) == PLUS
- && GET_CODE (XEXP (XEXP (tem, 0), 0)) == REG
+ && REG_P (XEXP (XEXP (tem, 0), 0))
&& GET_CODE (XEXP (XEXP (tem, 0), 1)) == CONST_INT)))
{
/* Must use TEM here, not AD, since it is the one that will
have any subexpressions reloaded, if needed. */
push_reload (tem, NULL_RTX, loc, (rtx*) 0,
- MODE_BASE_REG_CLASS (mode), GET_MODE (tem),
+ base_reg_class (mode, MEM, SCRATCH), GET_MODE (tem),
VOIDmode, 0,
0, opnum, type);
return ! removed_and;
targets (namely SH) we can also get too large displacements from
big-endian corrections. */
else if (GET_CODE (ad) == PLUS
- && GET_CODE (XEXP (ad, 0)) == REG
+ && REG_P (XEXP (ad, 0))
&& REGNO (XEXP (ad, 0)) < FIRST_PSEUDO_REGISTER
- && REG_MODE_OK_FOR_BASE_P (XEXP (ad, 0), mode)
- && GET_CODE (XEXP (ad, 1)) == CONST_INT)
+ && GET_CODE (XEXP (ad, 1)) == CONST_INT
+ && regno_ok_for_base_p (REGNO (XEXP (ad, 0)), mode, PLUS,
+ CONST_INT))
+
{
/* Unshare the MEM rtx so we can safely alter it. */
if (memrefloc)
/* If the sum of two regs is not necessarily valid,
reload the sum into a base reg.
That will at least work. */
- find_reloads_address_part (ad, loc, MODE_BASE_REG_CLASS (mode),
+ find_reloads_address_part (ad, loc,
+ base_reg_class (mode, MEM, SCRATCH),
Pmode, opnum, type, ind_levels);
}
return ! removed_and;
of it.
Handle all base registers here, not just fp/ap/sp, because on some
- targets (namely Sparc) we can also get invalid addresses from preventive
- subreg big-endian corrections made by find_reloads_toplev.
+ targets (namely SPARC) we can also get invalid addresses from preventive
+ subreg big-endian corrections made by find_reloads_toplev. We
+ can also get expressions involving LO_SUM (rather than PLUS) from
+ find_reloads_subreg_address.
If we decide to do something, it must be that `double_reg_address_ok'
is true. We generate a reload of the base register + constant and
This is safe because we know the address isn't shared.
We check for the base register as both the first and second operand of
- the innermost PLUS. */
-
- else if (GET_CODE (ad) == PLUS && GET_CODE (XEXP (ad, 1)) == CONST_INT
- && GET_CODE (XEXP (ad, 0)) == PLUS
- && GET_CODE (XEXP (XEXP (ad, 0), 0)) == REG
- && REGNO (XEXP (XEXP (ad, 0), 0)) < FIRST_PSEUDO_REGISTER
- && REG_MODE_OK_FOR_BASE_P (XEXP (XEXP (ad, 0), 0), mode)
- && ! maybe_memory_address_p (mode, ad, &XEXP (XEXP (ad, 0), 1)))
+ the innermost PLUS and/or LO_SUM. */
+
+ for (op_index = 0; op_index < 2; ++op_index)
{
- *loc = ad = gen_rtx_PLUS (GET_MODE (ad),
- plus_constant (XEXP (XEXP (ad, 0), 0),
- INTVAL (XEXP (ad, 1))),
- XEXP (XEXP (ad, 0), 1));
- find_reloads_address_part (XEXP (ad, 0), &XEXP (ad, 0),
- MODE_BASE_REG_CLASS (mode),
- GET_MODE (ad), opnum, type, ind_levels);
- find_reloads_address_1 (mode, XEXP (ad, 1), 1, &XEXP (ad, 1), opnum,
- type, 0, insn);
+ rtx operand, addend;
+ enum rtx_code inner_code;
- return 0;
- }
+ if (GET_CODE (ad) != PLUS)
+ continue;
- else if (GET_CODE (ad) == PLUS && GET_CODE (XEXP (ad, 1)) == CONST_INT
- && GET_CODE (XEXP (ad, 0)) == PLUS
- && GET_CODE (XEXP (XEXP (ad, 0), 1)) == REG
- && REGNO (XEXP (XEXP (ad, 0), 1)) < FIRST_PSEUDO_REGISTER
- && REG_MODE_OK_FOR_BASE_P (XEXP (XEXP (ad, 0), 1), mode)
- && ! maybe_memory_address_p (mode, ad, &XEXP (XEXP (ad, 0), 0)))
- {
- *loc = ad = gen_rtx_PLUS (GET_MODE (ad),
- XEXP (XEXP (ad, 0), 0),
- plus_constant (XEXP (XEXP (ad, 0), 1),
- INTVAL (XEXP (ad, 1))));
- find_reloads_address_part (XEXP (ad, 1), &XEXP (ad, 1),
- MODE_BASE_REG_CLASS (mode),
- GET_MODE (ad), opnum, type, ind_levels);
- find_reloads_address_1 (mode, XEXP (ad, 0), 1, &XEXP (ad, 0), opnum,
- type, 0, insn);
+ inner_code = GET_CODE (XEXP (ad, 0));
+ if (!(GET_CODE (ad) == PLUS
+ && GET_CODE (XEXP (ad, 1)) == CONST_INT
+ && (inner_code == PLUS || inner_code == LO_SUM)))
+ continue;
- return 0;
+ operand = XEXP (XEXP (ad, 0), op_index);
+ if (!REG_P (operand) || REGNO (operand) >= FIRST_PSEUDO_REGISTER)
+ continue;
+
+ addend = XEXP (XEXP (ad, 0), 1 - op_index);
+
+ if ((regno_ok_for_base_p (REGNO (operand), mode, inner_code,
+ GET_CODE (addend))
+ || operand == frame_pointer_rtx
+#if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
+ || operand == hard_frame_pointer_rtx
+#endif
+#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
+ || operand == arg_pointer_rtx
+#endif
+ || operand == stack_pointer_rtx)
+ && ! maybe_memory_address_p (mode, ad,
+ &XEXP (XEXP (ad, 0), 1 - op_index)))
+ {
+ rtx offset_reg;
+ enum reg_class cls;
+
+ offset_reg = plus_constant (operand, INTVAL (XEXP (ad, 1)));
+
+ /* Form the adjusted address. */
+ if (GET_CODE (XEXP (ad, 0)) == PLUS)
+ ad = gen_rtx_PLUS (GET_MODE (ad),
+ op_index == 0 ? offset_reg : addend,
+ op_index == 0 ? addend : offset_reg);
+ else
+ ad = gen_rtx_LO_SUM (GET_MODE (ad),
+ op_index == 0 ? offset_reg : addend,
+ op_index == 0 ? addend : offset_reg);
+ *loc = ad;
+
+ cls = base_reg_class (mode, MEM, GET_CODE (addend));
+ find_reloads_address_part (XEXP (ad, op_index),
+ &XEXP (ad, op_index), cls,
+ GET_MODE (ad), opnum, type, ind_levels);
+ find_reloads_address_1 (mode,
+ XEXP (ad, 1 - op_index), 1, GET_CODE (ad),
+ GET_CODE (XEXP (ad, op_index)),
+ &XEXP (ad, 1 - op_index), opnum,
+ type, 0, insn);
+
+ return 0;
+ }
}
/* See if address becomes valid when an eliminable register
loc = &XEXP (*loc, 0);
}
- find_reloads_address_part (ad, loc, MODE_BASE_REG_CLASS (mode),
+ find_reloads_address_part (ad, loc, base_reg_class (mode, MEM, SCRATCH),
Pmode, opnum, type, ind_levels);
return ! removed_and;
}
- return find_reloads_address_1 (mode, ad, 0, loc, opnum, type, ind_levels,
- insn);
+ return find_reloads_address_1 (mode, ad, 0, MEM, SCRATCH, loc, opnum, type,
+ ind_levels, insn);
}
\f
/* Find all pseudo regs appearing in AD
front of it for pseudos that we have to replace with stack slots. */
static rtx
-subst_reg_equivs (ad, insn)
- rtx ad;
- rtx insn;
+subst_reg_equivs (rtx ad, rtx insn)
{
RTX_CODE code = GET_CODE (ad);
int i;
This routine assumes both inputs are already in canonical form. */
rtx
-form_sum (x, y)
- rtx x, y;
+form_sum (rtx x, rtx y)
{
rtx tem;
enum machine_mode mode = GET_MODE (x);
In all other cases, return ADDR. */
static rtx
-subst_indexed_address (addr)
- rtx addr;
+subst_indexed_address (rtx addr)
{
rtx op0 = 0, op1 = 0, op2 = 0;
rtx tem;
{
/* Try to find a register to replace. */
op0 = XEXP (addr, 0), op1 = XEXP (addr, 1), op2 = 0;
- if (GET_CODE (op0) == REG
+ if (REG_P (op0)
&& (regno = REGNO (op0)) >= FIRST_PSEUDO_REGISTER
&& reg_renumber[regno] < 0
&& reg_equiv_constant[regno] != 0)
op0 = reg_equiv_constant[regno];
- else if (GET_CODE (op1) == REG
+ else if (REG_P (op1)
&& (regno = REGNO (op1)) >= FIRST_PSEUDO_REGISTER
&& reg_renumber[regno] < 0
&& reg_equiv_constant[regno] != 0)
RELOADNUM is the reload number. */
static void
-update_auto_inc_notes (insn, regno, reloadnum)
- rtx insn ATTRIBUTE_UNUSED;
- int regno ATTRIBUTE_UNUSED;
- int reloadnum ATTRIBUTE_UNUSED;
+update_auto_inc_notes (rtx insn ATTRIBUTE_UNUSED, int regno ATTRIBUTE_UNUSED,
+ int reloadnum ATTRIBUTE_UNUSED)
{
#ifdef AUTO_INC_DEC
rtx link;
CONTEXT = 1 means we are considering regs as index regs,
= 0 means we are considering them as base regs.
-
+ OUTER_CODE is the code of the enclosing RTX, typically a MEM, a PLUS,
+ or an autoinc code.
+ If CONTEXT == 0 and OUTER_CODE is a PLUS or LO_SUM, then INDEX_CODE
+ is the code of the index part of the address. Otherwise, pass SCRATCH
+ for this argument.
OPNUM and TYPE specify the purpose of any reloads made.
IND_LEVELS says how many levels of indirect addressing are
occurs as part of an address.
Also, this is not fully machine-customizable; it works for machines
such as VAXen and 68000's and 32000's, but other possible machines
- could have addressing modes that this does not handle right. */
+ could have addressing modes that this does not handle right.
+ If you add push_reload calls here, you need to make sure gen_reload
+ handles those cases gracefully. */
static int
-find_reloads_address_1 (mode, x, context, loc, opnum, type, ind_levels, insn)
- enum machine_mode mode;
- rtx x;
- int context;
- rtx *loc;
- int opnum;
- enum reload_type type;
- int ind_levels;
- rtx insn;
+find_reloads_address_1 (enum machine_mode mode, rtx x, int context,
+ enum rtx_code outer_code, enum rtx_code index_code,
+ rtx *loc, int opnum, enum reload_type type,
+ int ind_levels, rtx insn)
{
+#define REG_OK_FOR_CONTEXT(CONTEXT, REGNO, MODE, OUTER, INDEX) \
+ ((CONTEXT) == 0 \
+ ? regno_ok_for_base_p (REGNO, MODE, OUTER, INDEX) \
+ : REGNO_OK_FOR_INDEX_P (REGNO))
+
+ enum reg_class context_reg_class;
RTX_CODE code = GET_CODE (x);
+ if (context == 1)
+ context_reg_class = INDEX_REG_CLASS;
+ else
+ context_reg_class = base_reg_class (mode, outer_code, index_code);
+
switch (code)
{
case PLUS:
GET_MODE (orig_op1))));
}
/* Plus in the index register may be created only as a result of
- register remateralization for expresion like &localvar*4. Reload it.
+ register rematerialization for expression like &localvar*4. Reload it.
It may be possible to combine the displacement on the outer level,
but it is probably not worthwhile to do so. */
- if (context)
+ if (context == 1)
{
find_reloads_address (GET_MODE (x), loc, XEXP (x, 0), &XEXP (x, 0),
opnum, ADDR_TYPE (type), ind_levels, insn);
push_reload (*loc, NULL_RTX, loc, (rtx*) 0,
- (context ? INDEX_REG_CLASS : MODE_BASE_REG_CLASS (mode)),
+ context_reg_class,
GET_MODE (x), VOIDmode, 0, 0, opnum, type);
return 1;
}
if (code0 == MULT || code0 == SIGN_EXTEND || code0 == TRUNCATE
|| code0 == ZERO_EXTEND || code1 == MEM)
{
- find_reloads_address_1 (mode, orig_op0, 1, &XEXP (x, 0), opnum,
- type, ind_levels, insn);
- find_reloads_address_1 (mode, orig_op1, 0, &XEXP (x, 1), opnum,
- type, ind_levels, insn);
+ find_reloads_address_1 (mode, orig_op0, 1, PLUS, SCRATCH,
+ &XEXP (x, 0), opnum, type, ind_levels,
+ insn);
+ find_reloads_address_1 (mode, orig_op1, 0, PLUS, code0,
+ &XEXP (x, 1), opnum, type, ind_levels,
+ insn);
}
else if (code1 == MULT || code1 == SIGN_EXTEND || code1 == TRUNCATE
|| code1 == ZERO_EXTEND || code0 == MEM)
{
- find_reloads_address_1 (mode, orig_op0, 0, &XEXP (x, 0), opnum,
- type, ind_levels, insn);
- find_reloads_address_1 (mode, orig_op1, 1, &XEXP (x, 1), opnum,
- type, ind_levels, insn);
+ find_reloads_address_1 (mode, orig_op0, 0, PLUS, code1,
+ &XEXP (x, 0), opnum, type, ind_levels,
+ insn);
+ find_reloads_address_1 (mode, orig_op1, 1, PLUS, SCRATCH,
+ &XEXP (x, 1), opnum, type, ind_levels,
+ insn);
}
else if (code0 == CONST_INT || code0 == CONST
|| code0 == SYMBOL_REF || code0 == LABEL_REF)
- find_reloads_address_1 (mode, orig_op1, 0, &XEXP (x, 1), opnum,
- type, ind_levels, insn);
+ find_reloads_address_1 (mode, orig_op1, 0, PLUS, code0,
+ &XEXP (x, 1), opnum, type, ind_levels,
+ insn);
else if (code1 == CONST_INT || code1 == CONST
|| code1 == SYMBOL_REF || code1 == LABEL_REF)
- find_reloads_address_1 (mode, orig_op0, 0, &XEXP (x, 0), opnum,
- type, ind_levels, insn);
+ find_reloads_address_1 (mode, orig_op0, 0, PLUS, code1,
+ &XEXP (x, 0), opnum, type, ind_levels,
+ insn);
else if (code0 == REG && code1 == REG)
{
- if (REG_OK_FOR_INDEX_P (op0)
- && REG_MODE_OK_FOR_BASE_P (op1, mode))
+ if (REGNO_OK_FOR_INDEX_P (REGNO (op0))
+ && regno_ok_for_base_p (REGNO (op1), mode, PLUS, REG))
return 0;
- else if (REG_OK_FOR_INDEX_P (op1)
- && REG_MODE_OK_FOR_BASE_P (op0, mode))
+ else if (REGNO_OK_FOR_INDEX_P (REGNO (op1))
+ && regno_ok_for_base_p (REGNO (op0), mode, PLUS, REG))
return 0;
- else if (REG_MODE_OK_FOR_BASE_P (op1, mode))
- find_reloads_address_1 (mode, orig_op0, 1, &XEXP (x, 0), opnum,
- type, ind_levels, insn);
- else if (REG_MODE_OK_FOR_BASE_P (op0, mode))
- find_reloads_address_1 (mode, orig_op1, 1, &XEXP (x, 1), opnum,
- type, ind_levels, insn);
- else if (REG_OK_FOR_INDEX_P (op1))
- find_reloads_address_1 (mode, orig_op0, 0, &XEXP (x, 0), opnum,
- type, ind_levels, insn);
- else if (REG_OK_FOR_INDEX_P (op0))
- find_reloads_address_1 (mode, orig_op1, 0, &XEXP (x, 1), opnum,
- type, ind_levels, insn);
+ else if (regno_ok_for_base_p (REGNO (op1), mode, PLUS, REG))
+ find_reloads_address_1 (mode, orig_op0, 1, PLUS, SCRATCH,
+ &XEXP (x, 0), opnum, type, ind_levels,
+ insn);
+ else if (regno_ok_for_base_p (REGNO (op0), mode, PLUS, REG))
+ find_reloads_address_1 (mode, orig_op1, 1, PLUS, SCRATCH,
+ &XEXP (x, 1), opnum, type, ind_levels,
+ insn);
+ else if (REGNO_OK_FOR_INDEX_P (REGNO (op1)))
+ find_reloads_address_1 (mode, orig_op0, 0, PLUS, REG,
+ &XEXP (x, 0), opnum, type, ind_levels,
+ insn);
+ else if (REGNO_OK_FOR_INDEX_P (REGNO (op0)))
+ find_reloads_address_1 (mode, orig_op1, 0, PLUS, REG,
+ &XEXP (x, 1), opnum, type, ind_levels,
+ insn);
else
{
- find_reloads_address_1 (mode, orig_op0, 1, &XEXP (x, 0), opnum,
- type, ind_levels, insn);
- find_reloads_address_1 (mode, orig_op1, 0, &XEXP (x, 1), opnum,
- type, ind_levels, insn);
+ find_reloads_address_1 (mode, orig_op0, 1, PLUS, SCRATCH,
+ &XEXP (x, 0), opnum, type, ind_levels,
+ insn);
+ find_reloads_address_1 (mode, orig_op1, 0, PLUS, REG,
+ &XEXP (x, 1), opnum, type, ind_levels,
+ insn);
}
}
else if (code0 == REG)
{
- find_reloads_address_1 (mode, orig_op0, 1, &XEXP (x, 0), opnum,
- type, ind_levels, insn);
- find_reloads_address_1 (mode, orig_op1, 0, &XEXP (x, 1), opnum,
- type, ind_levels, insn);
+ find_reloads_address_1 (mode, orig_op0, 1, PLUS, SCRATCH,
+ &XEXP (x, 0), opnum, type, ind_levels,
+ insn);
+ find_reloads_address_1 (mode, orig_op1, 0, PLUS, REG,
+ &XEXP (x, 1), opnum, type, ind_levels,
+ insn);
}
else if (code1 == REG)
{
- find_reloads_address_1 (mode, orig_op1, 1, &XEXP (x, 1), opnum,
- type, ind_levels, insn);
- find_reloads_address_1 (mode, orig_op0, 0, &XEXP (x, 0), opnum,
- type, ind_levels, insn);
+ find_reloads_address_1 (mode, orig_op1, 1, PLUS, SCRATCH,
+ &XEXP (x, 1), opnum, type, ind_levels,
+ insn);
+ find_reloads_address_1 (mode, orig_op0, 0, PLUS, REG,
+ &XEXP (x, 0), opnum, type, ind_levels,
+ insn);
}
}
{
rtx op0 = XEXP (x, 0);
rtx op1 = XEXP (x, 1);
+ enum rtx_code index_code;
+ int regno;
+ int reloadnum;
if (GET_CODE (op1) != PLUS && GET_CODE (op1) != MINUS)
return 0;
where a base register is {inc,dec}remented by the contents
of another register or by a constant value. Thus, these
operands must match. */
- if (op0 != XEXP (op1, 0))
- abort ();
+ gcc_assert (op0 == XEXP (op1, 0));
/* Require index register (or constant). Let's just handle the
register case in the meantime... If the target allows
auto-modify by a constant then we could try replacing a pseudo
- register with its equivalent constant where applicable. */
- if (REG_P (XEXP (op1, 1)))
- if (!REGNO_OK_FOR_INDEX_P (REGNO (XEXP (op1, 1))))
- find_reloads_address_1 (mode, XEXP (op1, 1), 1, &XEXP (op1, 1),
- opnum, type, ind_levels, insn);
-
- if (REG_P (XEXP (op1, 0)))
+ register with its equivalent constant where applicable.
+
+ We also handle the case where the register was eliminated
+ resulting in a PLUS subexpression.
+
+ If we later decide to reload the whole PRE_MODIFY or
+ POST_MODIFY, inc_for_reload might clobber the reload register
+ before reading the index. The index register might therefore
+ need to live longer than a TYPE reload normally would, so be
+ conservative and class it as RELOAD_OTHER. */
+ if ((REG_P (XEXP (op1, 1))
+ && !REGNO_OK_FOR_INDEX_P (REGNO (XEXP (op1, 1))))
+ || GET_CODE (XEXP (op1, 1)) == PLUS)
+ find_reloads_address_1 (mode, XEXP (op1, 1), 1, code, SCRATCH,
+ &XEXP (op1, 1), opnum, RELOAD_OTHER,
+ ind_levels, insn);
+
+ gcc_assert (REG_P (XEXP (op1, 0)));
+
+ regno = REGNO (XEXP (op1, 0));
+ index_code = GET_CODE (XEXP (op1, 1));
+
+ /* A register that is incremented cannot be constant! */
+ gcc_assert (regno < FIRST_PSEUDO_REGISTER
+ || reg_equiv_constant[regno] == 0);
+
+ /* Handle a register that is equivalent to a memory location
+ which cannot be addressed directly. */
+ if (reg_equiv_memory_loc[regno] != 0
+ && (reg_equiv_address[regno] != 0
+ || num_not_at_initial_offset))
{
- int regno = REGNO (XEXP (op1, 0));
- int reloadnum;
-
- /* A register that is incremented cannot be constant! */
- if (regno >= FIRST_PSEUDO_REGISTER
- && reg_equiv_constant[regno] != 0)
- abort ();
-
- /* Handle a register that is equivalent to a memory location
- which cannot be addressed directly. */
- if (reg_equiv_memory_loc[regno] != 0
- && (reg_equiv_address[regno] != 0
- || num_not_at_initial_offset))
- {
- rtx tem = make_memloc (XEXP (x, 0), regno);
+ rtx tem = make_memloc (XEXP (x, 0), regno);
- if (reg_equiv_address[regno]
- || ! rtx_equal_p (tem, reg_equiv_mem[regno]))
- {
- /* First reload the memory location's address.
- We can't use ADDR_TYPE (type) here, because we need to
- write back the value after reading it, hence we actually
- need two registers. */
- find_reloads_address (GET_MODE (tem), &tem, XEXP (tem, 0),
- &XEXP (tem, 0), opnum,
- RELOAD_OTHER,
- ind_levels, insn);
-
- /* Then reload the memory location into a base
- register. */
- reloadnum = push_reload (tem, tem, &XEXP (x, 0),
- &XEXP (op1, 0),
- MODE_BASE_REG_CLASS (mode),
- GET_MODE (x), GET_MODE (x), 0,
- 0, opnum, RELOAD_OTHER);
-
- update_auto_inc_notes (this_insn, regno, reloadnum);
- return 0;
- }
- }
+ if (reg_equiv_address[regno]
+ || ! rtx_equal_p (tem, reg_equiv_mem[regno]))
+ {
+ rtx orig = tem;
+
+ /* First reload the memory location's address.
+ We can't use ADDR_TYPE (type) here, because we need to
+ write back the value after reading it, hence we actually
+ need two registers. */
+ find_reloads_address (GET_MODE (tem), &tem, XEXP (tem, 0),
+ &XEXP (tem, 0), opnum,
+ RELOAD_OTHER,
+ ind_levels, insn);
- if (reg_renumber[regno] >= 0)
- regno = reg_renumber[regno];
+ if (tem != orig)
+ push_reg_equiv_alt_mem (regno, tem);
- /* We require a base register here... */
- if (!REGNO_MODE_OK_FOR_BASE_P (regno, GET_MODE (x)))
- {
- reloadnum = push_reload (XEXP (op1, 0), XEXP (x, 0),
- &XEXP (op1, 0), &XEXP (x, 0),
- MODE_BASE_REG_CLASS (mode),
- GET_MODE (x), GET_MODE (x), 0, 0,
- opnum, RELOAD_OTHER);
+ /* Then reload the memory location into a base
+ register. */
+ reloadnum = push_reload (tem, tem, &XEXP (x, 0),
+ &XEXP (op1, 0),
+ base_reg_class (mode, code,
+ index_code),
+ GET_MODE (x), GET_MODE (x), 0,
+ 0, opnum, RELOAD_OTHER);
update_auto_inc_notes (this_insn, regno, reloadnum);
return 0;
}
}
- else
- abort ();
+
+ if (reg_renumber[regno] >= 0)
+ regno = reg_renumber[regno];
+
+ /* We require a base register here... */
+ if (!regno_ok_for_base_p (regno, GET_MODE (x), code, index_code))
+ {
+ reloadnum = push_reload (XEXP (op1, 0), XEXP (x, 0),
+ &XEXP (op1, 0), &XEXP (x, 0),
+ base_reg_class (mode, code, index_code),
+ GET_MODE (x), GET_MODE (x), 0, 0,
+ opnum, RELOAD_OTHER);
+
+ update_auto_inc_notes (this_insn, regno, reloadnum);
+ return 0;
+ }
}
return 0;
case POST_DEC:
case PRE_INC:
case PRE_DEC:
- if (GET_CODE (XEXP (x, 0)) == REG)
+ if (REG_P (XEXP (x, 0)))
{
int regno = REGNO (XEXP (x, 0));
int value = 0;
rtx x_orig = x;
/* A register that is incremented cannot be constant! */
- if (regno >= FIRST_PSEUDO_REGISTER
- && reg_equiv_constant[regno] != 0)
- abort ();
+ gcc_assert (regno < FIRST_PSEUDO_REGISTER
+ || reg_equiv_constant[regno] == 0);
/* Handle a register that is equivalent to a memory location
which cannot be addressed directly. */
if (reg_equiv_address[regno]
|| ! rtx_equal_p (tem, reg_equiv_mem[regno]))
{
+ rtx orig = tem;
+
/* First reload the memory location's address.
We can't use ADDR_TYPE (type) here, because we need to
write back the value after reading it, hence we actually
find_reloads_address (GET_MODE (tem), &tem, XEXP (tem, 0),
&XEXP (tem, 0), opnum, type,
ind_levels, insn);
+ if (tem != orig)
+ push_reg_equiv_alt_mem (regno, tem);
/* Put this inside a new increment-expression. */
x = gen_rtx_fmt_e (GET_CODE (x), GET_MODE (x), tem);
/* Proceed to reload that, as if it contained a register. */
if (reg_renumber[regno] >= 0)
regno = reg_renumber[regno];
- if ((regno >= FIRST_PSEUDO_REGISTER
- || !(context ? REGNO_OK_FOR_INDEX_P (regno)
- : REGNO_MODE_OK_FOR_BASE_P (regno, mode))))
+ if (regno >= FIRST_PSEUDO_REGISTER
+ || !REG_OK_FOR_CONTEXT (context, regno, mode, outer_code,
+ index_code))
{
int reloadnum;
memory location, since this will make it harder to
reuse address reloads, and increases register pressure.
Also don't do this if we can probably update x directly. */
- rtx equiv = (GET_CODE (XEXP (x, 0)) == MEM
+ rtx equiv = (MEM_P (XEXP (x, 0))
? XEXP (x, 0)
: reg_equiv_mem[regno]);
int icode = (int) add_optab->handlers[(int) Pmode].insn_code;
- if (insn && GET_CODE (insn) == INSN && equiv
+ if (insn && NONJUMP_INSN_P (insn) && equiv
&& memory_operand (equiv, GET_MODE (equiv))
#ifdef HAVE_cc0
&& ! sets_cc0_p (PATTERN (insn))
x = XEXP (x, 0);
reloadnum
= push_reload (x, x, loc, loc,
- (context ? INDEX_REG_CLASS :
- MODE_BASE_REG_CLASS (mode)),
+ context_reg_class,
GET_MODE (x), GET_MODE (x), 0, 0,
opnum, RELOAD_OTHER);
}
{
reloadnum
= push_reload (x, NULL_RTX, loc, (rtx*) 0,
- (context ? INDEX_REG_CLASS :
- MODE_BASE_REG_CLASS (mode)),
+ context_reg_class,
GET_MODE (x), GET_MODE (x), 0, 0,
opnum, type);
rld[reloadnum].inc
}
return value;
}
-
- else if (GET_CODE (XEXP (x, 0)) == MEM)
- {
- /* This is probably the result of a substitution, by eliminate_regs,
- of an equivalent address for a pseudo that was not allocated to a
- hard register. Verify that the specified address is valid and
- reload it into a register. */
- /* Variable `tem' might or might not be used in FIND_REG_INC_NOTE. */
- rtx tem ATTRIBUTE_UNUSED = XEXP (x, 0);
- rtx link;
- int reloadnum;
-
- /* Since we know we are going to reload this item, don't decrement
- for the indirection level.
-
- Note that this is actually conservative: it would be slightly
- more efficient to use the value of SPILL_INDIRECT_LEVELS from
- reload1.c here. */
- /* We can't use ADDR_TYPE (type) here, because we need to
- write back the value after reading it, hence we actually
- need two registers. */
- find_reloads_address (GET_MODE (x), &XEXP (x, 0),
- XEXP (XEXP (x, 0), 0), &XEXP (XEXP (x, 0), 0),
- opnum, type, ind_levels, insn);
-
- reloadnum = push_reload (x, NULL_RTX, loc, (rtx*) 0,
- (context ? INDEX_REG_CLASS :
- MODE_BASE_REG_CLASS (mode)),
- GET_MODE (x), VOIDmode, 0, 0, opnum, type);
- rld[reloadnum].inc
- = find_inc_amount (PATTERN (this_insn), XEXP (x, 0));
-
- link = FIND_REG_INC_NOTE (this_insn, tem);
- if (link != 0)
- push_replacement (&XEXP (link, 0), reloadnum, VOIDmode);
-
- return 1;
- }
return 0;
+ case TRUNCATE:
+ case SIGN_EXTEND:
+ case ZERO_EXTEND:
+ /* Look for parts to reload in the inner expression and reload them
+ too, in addition to this operation. Reloading all inner parts in
+ addition to this one shouldn't be necessary, but at this point,
+ we don't know if we can possibly omit any part that *can* be
+ reloaded. Targets that are better off reloading just either part
+ (or perhaps even a different part of an outer expression), should
+ define LEGITIMIZE_RELOAD_ADDRESS. */
+ find_reloads_address_1 (GET_MODE (XEXP (x, 0)), XEXP (x, 0),
+ context, code, SCRATCH, &XEXP (x, 0), opnum,
+ type, ind_levels, insn);
+ push_reload (x, NULL_RTX, loc, (rtx*) 0,
+ context_reg_class,
+ GET_MODE (x), VOIDmode, 0, 0, opnum, type);
+ return 1;
+
case MEM:
/* This is probably the result of a substitution, by eliminate_regs, of
an equivalent address for a pseudo that was not allocated to a hard
find_reloads_address (GET_MODE (x), loc, XEXP (x, 0), &XEXP (x, 0),
opnum, ADDR_TYPE (type), ind_levels, insn);
push_reload (*loc, NULL_RTX, loc, (rtx*) 0,
- (context ? INDEX_REG_CLASS : MODE_BASE_REG_CLASS (mode)),
+ context_reg_class,
GET_MODE (x), VOIDmode, 0, 0, opnum, type);
return 1;
if (reg_equiv_constant[regno] != 0)
{
find_reloads_address_part (reg_equiv_constant[regno], loc,
- (context ? INDEX_REG_CLASS :
- MODE_BASE_REG_CLASS (mode)),
+ context_reg_class,
GET_MODE (x), opnum, type, ind_levels);
return 1;
}
if (reg_equiv_mem[regno] != 0)
{
push_reload (reg_equiv_mem[regno], NULL_RTX, loc, (rtx*) 0,
- (context ? INDEX_REG_CLASS :
- MODE_BASE_REG_CLASS (mode)),
+ context_reg_class,
GET_MODE (x), VOIDmode, 0, 0, opnum, type);
return 1;
}
find_reloads_address (GET_MODE (x), &x, XEXP (x, 0),
&XEXP (x, 0), opnum, ADDR_TYPE (type),
ind_levels, insn);
+ if (x != tem)
+ push_reg_equiv_alt_mem (regno, x);
}
}
if (reg_renumber[regno] >= 0)
regno = reg_renumber[regno];
- if ((regno >= FIRST_PSEUDO_REGISTER
- || !(context ? REGNO_OK_FOR_INDEX_P (regno)
- : REGNO_MODE_OK_FOR_BASE_P (regno, mode))))
+ if (regno >= FIRST_PSEUDO_REGISTER
+ || !REG_OK_FOR_CONTEXT (context, regno, mode, outer_code,
+ index_code))
{
push_reload (x, NULL_RTX, loc, (rtx*) 0,
- (context ? INDEX_REG_CLASS : MODE_BASE_REG_CLASS (mode)),
+ context_reg_class,
GET_MODE (x), VOIDmode, 0, 0, opnum, type);
return 1;
}
if (regno_clobbered_p (regno, this_insn, GET_MODE (x), 0))
{
push_reload (x, NULL_RTX, loc, (rtx*) 0,
- (context ? INDEX_REG_CLASS : MODE_BASE_REG_CLASS (mode)),
+ context_reg_class,
GET_MODE (x), VOIDmode, 0, 0, opnum, type);
return 1;
}
return 0;
case SUBREG:
- if (GET_CODE (SUBREG_REG (x)) == REG)
+ if (REG_P (SUBREG_REG (x)))
{
/* If this is a SUBREG of a hard register and the resulting register
is of the wrong class, reload the whole SUBREG. This avoids
{
int regno ATTRIBUTE_UNUSED = subreg_regno (x);
- if (! (context ? REGNO_OK_FOR_INDEX_P (regno)
- : REGNO_MODE_OK_FOR_BASE_P (regno, mode)))
+ if (!REG_OK_FOR_CONTEXT (context, regno, mode, outer_code,
+ index_code))
{
push_reload (x, NULL_RTX, loc, (rtx*) 0,
- (context ? INDEX_REG_CLASS :
- MODE_BASE_REG_CLASS (mode)),
+ context_reg_class,
GET_MODE (x), VOIDmode, 0, 0, opnum, type);
return 1;
}
is larger than the class size, then reload the whole SUBREG. */
else
{
- enum reg_class class = (context ? INDEX_REG_CLASS
- : MODE_BASE_REG_CLASS (mode));
+ enum reg_class class = context_reg_class;
if ((unsigned) CLASS_MAX_NREGS (class, GET_MODE (SUBREG_REG (x)))
> reg_class_size[class])
{
- x = find_reloads_subreg_address (x, 0, opnum, type,
+ x = find_reloads_subreg_address (x, 0, opnum,
+ ADDR_TYPE (type),
ind_levels, insn);
push_reload (x, NULL_RTX, loc, (rtx*) 0, class,
GET_MODE (x), VOIDmode, 0, 0, opnum, type);
for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
{
if (fmt[i] == 'e')
- find_reloads_address_1 (mode, XEXP (x, i), context, &XEXP (x, i),
- opnum, type, ind_levels, insn);
+ /* Pass SCRATCH for INDEX_CODE, since CODE can never be a PLUS once
+ we get here. */
+ find_reloads_address_1 (mode, XEXP (x, i), context, code, SCRATCH,
+ &XEXP (x, i), opnum, type, ind_levels, insn);
}
}
+#undef REG_OK_FOR_CONTEXT
return 0;
}
\f
supports. */
static void
-find_reloads_address_part (x, loc, class, mode, opnum, type, ind_levels)
- rtx x;
- rtx *loc;
- enum reg_class class;
- enum machine_mode mode;
- int opnum;
- enum reload_type type;
- int ind_levels;
+find_reloads_address_part (rtx x, rtx *loc, enum reg_class class,
+ enum machine_mode mode, int opnum,
+ enum reload_type type, int ind_levels)
{
if (CONSTANT_P (x)
&& (! LEGITIMATE_CONSTANT_P (x)
stack slots. */
static rtx
-find_reloads_subreg_address (x, force_replace, opnum, type,
- ind_levels, insn)
- rtx x;
- int force_replace;
- int opnum;
- enum reload_type type;
- int ind_levels;
- rtx insn;
+find_reloads_subreg_address (rtx x, int force_replace, int opnum,
+ enum reload_type type, int ind_levels, rtx insn)
{
int regno = REGNO (SUBREG_REG (x));
if (force_replace
|| ! rtx_equal_p (tem, reg_equiv_mem[regno]))
{
- int offset = SUBREG_BYTE (x);
unsigned outer_size = GET_MODE_SIZE (GET_MODE (x));
unsigned inner_size = GET_MODE_SIZE (GET_MODE (SUBREG_REG (x)));
+ int offset;
+ rtx orig = tem;
+
+ /* For big-endian paradoxical subregs, SUBREG_BYTE does not
+ hold the correct (negative) byte offset. */
+ if (BYTES_BIG_ENDIAN && outer_size > inner_size)
+ offset = inner_size - outer_size;
+ else
+ offset = SUBREG_BYTE (x);
XEXP (tem, 0) = plus_constant (XEXP (tem, 0), offset);
PUT_MODE (tem, GET_MODE (x));
/* If this was a paradoxical subreg that we replaced, the
resulting memory must be sufficiently aligned to allow
us to widen the mode of the memory. */
- if (outer_size > inner_size && STRICT_ALIGNMENT)
+ if (outer_size > inner_size)
{
rtx base;
return x;
base = XEXP (base, 0);
}
- if (GET_CODE (base) != REG
+ if (!REG_P (base)
|| (REGNO_POINTER_ALIGN (REGNO (base))
< outer_size * BITS_PER_UNIT))
return x;
}
find_reloads_address (GET_MODE (tem), &tem, XEXP (tem, 0),
- &XEXP (tem, 0), opnum, ADDR_TYPE (type),
+ &XEXP (tem, 0), opnum, type,
ind_levels, insn);
+ /* ??? Do we need to handle nonzero offsets somehow? */
+ if (!offset && tem != orig)
+ push_reg_equiv_alt_mem (regno, tem);
/* If this is not a toplevel operand, find_reloads doesn't see
this substitution. We have to emit a USE of the pseudo so
Return the rtx that X translates into; usually X, but modified. */
void
-subst_reloads (insn)
- rtx insn;
+subst_reloads (rtx insn)
{
int i;
for (check_regno = 0; check_regno < max_regno; check_regno++)
{
#define CHECK_MODF(ARRAY) \
- if (ARRAY[check_regno] \
- && loc_mentioned_in_p (r->where, \
- ARRAY[check_regno])) \
- abort ()
+ gcc_assert (!ARRAY[check_regno] \
+ || !loc_mentioned_in_p (r->where, \
+ ARRAY[check_regno]))
CHECK_MODF (reg_equiv_constant);
CHECK_MODF (reg_equiv_memory_loc);
REG_LABEL note to indicate to flow which label this
register refers to. */
if (GET_CODE (*r->where) == LABEL_REF
- && GET_CODE (insn) == JUMP_INSN)
- REG_NOTES (insn) = gen_rtx_INSN_LIST (REG_LABEL,
- XEXP (*r->where, 0),
- REG_NOTES (insn));
+ && JUMP_P (insn))
+ {
+ REG_NOTES (insn) = gen_rtx_INSN_LIST (REG_LABEL,
+ XEXP (*r->where, 0),
+ REG_NOTES (insn));
+ JUMP_LABEL (insn) = XEXP (*r->where, 0);
+ }
/* Encapsulate RELOADREG so its machine mode matches what
used to be there. Note that gen_lowpart_common will
*r->where = reloadreg;
}
/* If reload got no reg and isn't optional, something's wrong. */
- else if (! rld[r->what].optional)
- abort ();
+ else
+ gcc_assert (rld[r->what].optional);
}
}
\f
copies to locations in Y, a copy of X. */
void
-copy_replacements (x, y)
- rtx x, y;
+copy_replacements (rtx x, rtx y)
{
/* We can't support X being a SUBREG because we might then need to know its
location if something inside it was replaced. */
- if (GET_CODE (x) == SUBREG)
- abort ();
+ gcc_assert (GET_CODE (x) != SUBREG);
copy_replacements_1 (&x, &y, n_replacements);
}
static void
-copy_replacements_1 (px, py, orig_replacements)
- rtx *px;
- rtx *py;
- int orig_replacements;
+copy_replacements_1 (rtx *px, rtx *py, int orig_replacements)
{
int i, j;
rtx x, y;
/* Change any replacements being done to *X to be done to *Y. */
void
-move_replacements (x, y)
- rtx *x;
- rtx *y;
+move_replacements (rtx *x, rtx *y)
{
int i;
Otherwise, return *LOC. */
rtx
-find_replacement (loc)
- rtx *loc;
+find_replacement (rtx *loc)
{
struct replacement *r;
??? Is it actually still ever a SUBREG? If so, why? */
- if (GET_CODE (reloadreg) == REG)
+ if (REG_P (reloadreg))
return gen_rtx_REG (GET_MODE (*loc),
(REGNO (reloadreg) +
subreg_regno_offset (REGNO (SUBREG_REG (*loc)),
This is similar to refers_to_regno_p in rtlanal.c except that we
look at equivalences for pseudos that didn't get hard registers. */
-int
-refers_to_regno_for_reload_p (regno, endregno, x, loc)
- unsigned int regno, endregno;
- rtx x;
- rtx *loc;
+static int
+refers_to_regno_for_reload_p (unsigned int regno, unsigned int endregno,
+ rtx x, rtx *loc)
{
int i;
unsigned int r;
reg_equiv_memory_loc[r],
(rtx*) 0);
- if (reg_equiv_constant[r])
- return 0;
-
- abort ();
+ gcc_assert (reg_equiv_constant[r] || reg_equiv_invariant[r]);
+ return 0;
}
return (endregno > r
&& regno < r + (r < FIRST_PSEUDO_REGISTER
- ? HARD_REGNO_NREGS (r, GET_MODE (x))
+ ? hard_regno_nregs[r][GET_MODE (x)]
: 1));
case SUBREG:
/* If this is a SUBREG of a hard reg, we can see exactly which
registers are being modified. Otherwise, handle normally. */
- if (GET_CODE (SUBREG_REG (x)) == REG
+ if (REG_P (SUBREG_REG (x))
&& REGNO (SUBREG_REG (x)) < FIRST_PSEUDO_REGISTER)
{
unsigned int inner_regno = subreg_regno (x);
unsigned int inner_endregno
= inner_regno + (inner_regno < FIRST_PSEUDO_REGISTER
- ? HARD_REGNO_NREGS (regno, GET_MODE (x)) : 1);
+ ? subreg_nregs (x) : 1);
return endregno > inner_regno && regno < inner_endregno;
}
treat each word individually. */
&& ((GET_CODE (SET_DEST (x)) == SUBREG
&& loc != &SUBREG_REG (SET_DEST (x))
- && GET_CODE (SUBREG_REG (SET_DEST (x))) == REG
+ && REG_P (SUBREG_REG (SET_DEST (x)))
&& REGNO (SUBREG_REG (SET_DEST (x))) >= FIRST_PSEUDO_REGISTER
&& refers_to_regno_for_reload_p (regno, endregno,
SUBREG_REG (SET_DEST (x)),
loc))
/* If the output is an earlyclobber operand, this is
a conflict. */
- || ((GET_CODE (SET_DEST (x)) != REG
+ || ((!REG_P (SET_DEST (x))
|| earlyclobber_operand_p (SET_DEST (x)))
&& refers_to_regno_for_reload_p (regno, endregno,
SET_DEST (x), loc))))
that we look at equivalences for pseudos that didn't get hard registers. */
int
-reg_overlap_mentioned_for_reload_p (x, in)
- rtx x, in;
+reg_overlap_mentioned_for_reload_p (rtx x, rtx in)
{
int regno, endregno;
/* Overly conservative. */
if (GET_CODE (x) == STRICT_LOW_PART
- || GET_RTX_CLASS (GET_CODE (x)) == 'a')
+ || GET_RTX_CLASS (GET_CODE (x)) == RTX_AUTOINC)
x = XEXP (x, 0);
/* If either argument is a constant, then modifying X can not affect IN. */
if (CONSTANT_P (x) || CONSTANT_P (in))
return 0;
+ else if (GET_CODE (x) == SUBREG && GET_CODE (SUBREG_REG (x)) == MEM)
+ return refers_to_mem_for_reload_p (in);
else if (GET_CODE (x) == SUBREG)
{
regno = REGNO (SUBREG_REG (x));
GET_MODE (SUBREG_REG (x)),
SUBREG_BYTE (x),
GET_MODE (x));
+ endregno = regno + (regno < FIRST_PSEUDO_REGISTER
+ ? subreg_nregs (x) : 1);
+
+ return refers_to_regno_for_reload_p (regno, endregno, in, (rtx*) 0);
}
- else if (GET_CODE (x) == REG)
+ else if (REG_P (x))
{
regno = REGNO (x);
{
if (reg_equiv_memory_loc[regno])
return refers_to_mem_for_reload_p (in);
- else if (reg_equiv_constant[regno])
- return 0;
- abort ();
+ gcc_assert (reg_equiv_constant[regno]);
+ return 0;
}
+
+ endregno = regno + hard_regno_nregs[regno][GET_MODE (x)];
+
+ return refers_to_regno_for_reload_p (regno, endregno, in, (rtx*) 0);
}
- else if (GET_CODE (x) == MEM)
+ else if (MEM_P (x))
return refers_to_mem_for_reload_p (in);
else if (GET_CODE (x) == SCRATCH || GET_CODE (x) == PC
|| GET_CODE (x) == CC0)
return reg_mentioned_p (x, in);
- else if (GET_CODE (x) == PLUS)
- return (reg_overlap_mentioned_for_reload_p (XEXP (x, 0), in)
- || reg_overlap_mentioned_for_reload_p (XEXP (x, 1), in));
- else
- abort ();
-
- endregno = regno + (regno < FIRST_PSEUDO_REGISTER
- ? HARD_REGNO_NREGS (regno, GET_MODE (x)) : 1);
+ else
+ {
+ gcc_assert (GET_CODE (x) == PLUS);
+
+ /* We actually want to know if X is mentioned somewhere inside IN.
+ We must not say that (plus (sp) (const_int 124)) is in
+ (plus (sp) (const_int 64)), since that can lead to incorrect reload
+ allocation when spuriously changing a RELOAD_FOR_OUTPUT_ADDRESS
+ into a RELOAD_OTHER on behalf of another RELOAD_OTHER. */
+ while (MEM_P (in))
+ in = XEXP (in, 0);
+ if (REG_P (in))
+ return 0;
+ else if (GET_CODE (in) == PLUS)
+ return (reg_overlap_mentioned_for_reload_p (x, XEXP (in, 0))
+ || reg_overlap_mentioned_for_reload_p (x, XEXP (in, 1)));
+ else return (reg_overlap_mentioned_for_reload_p (XEXP (x, 0), in)
+ || reg_overlap_mentioned_for_reload_p (XEXP (x, 1), in));
+ }
- return refers_to_regno_for_reload_p (regno, endregno, in, (rtx*) 0);
+ gcc_unreachable ();
}
/* Return nonzero if anything in X contains a MEM. Look also for pseudo
registers. */
-int
-refers_to_mem_for_reload_p (x)
- rtx x;
+static int
+refers_to_mem_for_reload_p (rtx x)
{
const char *fmt;
int i;
- if (GET_CODE (x) == MEM)
+ if (MEM_P (x))
return 1;
- if (GET_CODE (x) == REG)
+ if (REG_P (x))
return (REGNO (x) >= FIRST_PSEUDO_REGISTER
&& reg_equiv_memory_loc[REGNO (x)]);
fmt = GET_RTX_FORMAT (GET_CODE (x));
for (i = GET_RTX_LENGTH (GET_CODE (x)) - 1; i >= 0; i--)
if (fmt[i] == 'e'
- && (GET_CODE (XEXP (x, i)) == MEM
+ && (MEM_P (XEXP (x, i))
|| refers_to_mem_for_reload_p (XEXP (x, i))))
return 1;
as if it were a constant except that sp is required to be unchanging. */
rtx
-find_equiv_reg (goal, insn, class, other, reload_reg_p, goalreg, mode)
- rtx goal;
- rtx insn;
- enum reg_class class;
- int other;
- short *reload_reg_p;
- int goalreg;
- enum machine_mode mode;
+find_equiv_reg (rtx goal, rtx insn, enum reg_class class, int other,
+ short *reload_reg_p, int goalreg, enum machine_mode mode)
{
rtx p = insn;
rtx goaltry, valtry, value, where;
int need_stable_sp = 0;
int nregs;
int valuenregs;
+ int num = 0;
if (goal == 0)
regno = goalreg;
- else if (GET_CODE (goal) == REG)
+ else if (REG_P (goal))
regno = REGNO (goal);
- else if (GET_CODE (goal) == MEM)
+ else if (MEM_P (goal))
{
enum rtx_code code = GET_CODE (XEXP (goal, 0));
if (MEM_VOLATILE_P (goal))
return 0;
- if (flag_float_store && GET_MODE_CLASS (GET_MODE (goal)) == MODE_FLOAT)
+ if (flag_float_store && SCALAR_FLOAT_MODE_P (GET_MODE (goal)))
return 0;
/* An address with side effects must be reexecuted. */
switch (code)
else
return 0;
+ num = 0;
/* Scan insns back from INSN, looking for one that copies
a value into or out of GOAL.
Stop and give up if we reach a label. */
while (1)
{
p = PREV_INSN (p);
- if (p == 0 || GET_CODE (p) == CODE_LABEL)
+ num++;
+ if (p == 0 || LABEL_P (p)
+ || num > PARAM_VALUE (PARAM_MAX_RELOAD_SEARCH_INSNS))
return 0;
- if (GET_CODE (p) == INSN
+ if (NONJUMP_INSN_P (p)
/* If we don't want spill regs ... */
&& (! (reload_reg_p != 0
&& reload_reg_p != (short *) (HOST_WIDE_INT) 1)
different from what they were when calculating the need for
spills. If we notice an input-reload insn here, we will
reject it below, but it might hide a usable equivalent.
- That makes bad code. It may even abort: perhaps no reg was
+ That makes bad code. It may even fail: perhaps no reg was
spilled for this insn because it was assumed we would find
that equivalent. */
|| INSN_UID (p) < reload_first_uid))
&& ((rtx_equal_p (XEXP (tem, 0), goal)
&& (valueno
= true_regnum (valtry = SET_DEST (pat))) >= 0)
- || (GET_CODE (SET_DEST (pat)) == REG
+ || (REG_P (SET_DEST (pat))
&& GET_CODE (XEXP (tem, 0)) == CONST_DOUBLE
- && (GET_MODE_CLASS (GET_MODE (XEXP (tem, 0)))
- == MODE_FLOAT)
+ && SCALAR_FLOAT_MODE_P (GET_MODE (XEXP (tem, 0)))
&& GET_CODE (goal) == CONST_INT
&& 0 != (goaltry
= operand_subword (XEXP (tem, 0), 0, 0,
&& (valueno = true_regnum (valtry)) >= 0)))
|| (goal_const && (tem = find_reg_note (p, REG_EQUIV,
NULL_RTX))
- && GET_CODE (SET_DEST (pat)) == REG
+ && REG_P (SET_DEST (pat))
&& GET_CODE (XEXP (tem, 0)) == CONST_DOUBLE
- && (GET_MODE_CLASS (GET_MODE (XEXP (tem, 0)))
- == MODE_FLOAT)
+ && SCALAR_FLOAT_MODE_P (GET_MODE (XEXP (tem, 0)))
&& GET_CODE (goal) == CONST_INT
&& 0 != (goaltry = operand_subword (XEXP (tem, 0), 1, 0,
VOIDmode))
{
int i;
- for (i = HARD_REGNO_NREGS (valueno, mode) - 1; i >= 0; i--)
+ for (i = hard_regno_nregs[valueno][mode] - 1; i >= 0; i--)
if (! TEST_HARD_REG_BIT (reg_class_contents[(int) class],
valueno + i))
break;
if (goal_mem && value == SET_DEST (single_set (where))
&& refers_to_regno_for_reload_p (valueno,
(valueno
- + HARD_REGNO_NREGS (valueno, mode)),
+ + hard_regno_nregs[valueno][mode]),
goal, (rtx*) 0))
return 0;
/* Reject registers that overlap GOAL. */
+ if (regno >= 0 && regno < FIRST_PSEUDO_REGISTER)
+ nregs = hard_regno_nregs[regno][mode];
+ else
+ nregs = 1;
+ valuenregs = hard_regno_nregs[valueno][mode];
+
if (!goal_mem && !goal_const
- && regno + (int) HARD_REGNO_NREGS (regno, mode) > valueno
- && regno < valueno + (int) HARD_REGNO_NREGS (valueno, mode))
+ && regno + nregs > valueno && regno < valueno + valuenregs)
return 0;
- nregs = HARD_REGNO_NREGS (regno, mode);
- valuenregs = HARD_REGNO_NREGS (valueno, mode);
-
/* Reject VALUE if it is one of the regs reserved for reloads.
Reload1 knows how to reuse them anyway, and it would get
confused if we allocated one without its knowledge.
if (rld[i].reg_rtx != 0 && rld[i].in)
{
int regno1 = REGNO (rld[i].reg_rtx);
- int nregs1 = HARD_REGNO_NREGS (regno1,
- GET_MODE (rld[i].reg_rtx));
+ int nregs1 = hard_regno_nregs[regno1]
+ [GET_MODE (rld[i].reg_rtx)];
if (regno1 < valueno + valuenregs
&& regno1 + nregs1 > valueno)
return 0;
/* Don't trust the conversion past a function call
if either of the two is in a call-clobbered register, or memory. */
- if (GET_CODE (p) == CALL_INSN)
+ if (CALL_P (p))
{
int i;
if (regno >= 0 && regno < FIRST_PSEUDO_REGISTER)
for (i = 0; i < nregs; ++i)
- if (call_used_regs[regno + i])
+ if (call_used_regs[regno + i]
+ || HARD_REGNO_CALL_PART_CLOBBERED (regno + i, mode))
return 0;
if (valueno >= 0 && valueno < FIRST_PSEUDO_REGISTER)
for (i = 0; i < valuenregs; ++i)
- if (call_used_regs[valueno + i])
+ if (call_used_regs[valueno + i]
+ || HARD_REGNO_CALL_PART_CLOBBERED (valueno + i, mode))
return 0;
-#ifdef NON_SAVING_SETJMP
- if (NON_SAVING_SETJMP && find_reg_note (p, REG_SETJMP, NULL))
- return 0;
-#endif
}
if (INSN_P (p))
rtx dest = SET_DEST (pat);
while (GET_CODE (dest) == SUBREG
|| GET_CODE (dest) == ZERO_EXTRACT
- || GET_CODE (dest) == SIGN_EXTRACT
|| GET_CODE (dest) == STRICT_LOW_PART)
dest = XEXP (dest, 0);
- if (GET_CODE (dest) == REG)
+ if (REG_P (dest))
{
int xregno = REGNO (dest);
int xnregs;
if (REGNO (dest) < FIRST_PSEUDO_REGISTER)
- xnregs = HARD_REGNO_NREGS (xregno, GET_MODE (dest));
+ xnregs = hard_regno_nregs[xregno][GET_MODE (dest)];
else
xnregs = 1;
if (xregno < regno + nregs && xregno + xnregs > regno)
if (xregno == STACK_POINTER_REGNUM && need_stable_sp)
return 0;
}
- else if (goal_mem && GET_CODE (dest) == MEM
+ else if (goal_mem && MEM_P (dest)
&& ! push_operand (dest, GET_MODE (dest)))
return 0;
- else if (GET_CODE (dest) == MEM && regno >= FIRST_PSEUDO_REGISTER
+ else if (MEM_P (dest) && regno >= FIRST_PSEUDO_REGISTER
&& reg_equiv_memory_loc[regno] != 0)
return 0;
else if (need_stable_sp && push_operand (dest, GET_MODE (dest)))
rtx dest = SET_DEST (v1);
while (GET_CODE (dest) == SUBREG
|| GET_CODE (dest) == ZERO_EXTRACT
- || GET_CODE (dest) == SIGN_EXTRACT
|| GET_CODE (dest) == STRICT_LOW_PART)
dest = XEXP (dest, 0);
- if (GET_CODE (dest) == REG)
+ if (REG_P (dest))
{
int xregno = REGNO (dest);
int xnregs;
if (REGNO (dest) < FIRST_PSEUDO_REGISTER)
- xnregs = HARD_REGNO_NREGS (xregno, GET_MODE (dest));
+ xnregs = hard_regno_nregs[xregno][GET_MODE (dest)];
else
xnregs = 1;
if (xregno < regno + nregs
if (xregno == STACK_POINTER_REGNUM && need_stable_sp)
return 0;
}
- else if (goal_mem && GET_CODE (dest) == MEM
+ else if (goal_mem && MEM_P (dest)
&& ! push_operand (dest, GET_MODE (dest)))
return 0;
- else if (GET_CODE (dest) == MEM && regno >= FIRST_PSEUDO_REGISTER
+ else if (MEM_P (dest) && regno >= FIRST_PSEUDO_REGISTER
&& reg_equiv_memory_loc[regno] != 0)
return 0;
else if (need_stable_sp
}
}
- if (GET_CODE (p) == CALL_INSN && CALL_INSN_FUNCTION_USAGE (p))
+ if (CALL_P (p) && CALL_INSN_FUNCTION_USAGE (p))
{
rtx link;
{
rtx dest = SET_DEST (pat);
- if (GET_CODE (dest) == REG)
+ if (REG_P (dest))
{
int xregno = REGNO (dest);
int xnregs
- = HARD_REGNO_NREGS (xregno, GET_MODE (dest));
+ = hard_regno_nregs[xregno][GET_MODE (dest)];
if (xregno < regno + nregs
&& xregno + xnregs > regno)
return 0;
}
- else if (goal_mem && GET_CODE (dest) == MEM
+ else if (goal_mem && MEM_P (dest)
&& ! push_operand (dest, GET_MODE (dest)))
return 0;
else if (need_stable_sp
for (link = REG_NOTES (p); link; link = XEXP (link, 1))
if (REG_NOTE_KIND (link) == REG_INC
- && GET_CODE (XEXP (link, 0)) == REG)
+ && REG_P (XEXP (link, 0)))
{
int incno = REGNO (XEXP (link, 0));
if (incno < regno + nregs && incno >= regno)
The value is always positive. */
static int
-find_inc_amount (x, inced)
- rtx x, inced;
+find_inc_amount (rtx x, rtx inced)
{
enum rtx_code code = GET_CODE (x);
const char *fmt;
return 0;
}
\f
+/* Return 1 if registers from REGNO to ENDREGNO are the subjects of a
+ REG_INC note in insn INSN. REGNO must refer to a hard register. */
+
+#ifdef AUTO_INC_DEC
+static int
+reg_inc_found_and_valid_p (unsigned int regno, unsigned int endregno,
+ rtx insn)
+{
+ rtx link;
+
+ gcc_assert (insn);
+
+ if (! INSN_P (insn))
+ return 0;
+
+ for (link = REG_NOTES (insn); link; link = XEXP (link, 1))
+ if (REG_NOTE_KIND (link) == REG_INC)
+ {
+ unsigned int test = (int) REGNO (XEXP (link, 0));
+ if (test >= regno && test < endregno)
+ return 1;
+ }
+ return 0;
+}
+#else
+
+#define reg_inc_found_and_valid_p(regno,endregno,insn) 0
+
+#endif
+
/* Return 1 if register REGNO is the subject of a clobber in insn INSN.
- If SETS is nonzero, also consider SETs. */
+ If SETS is 1, also consider SETs. If SETS is 2, enable checking
+ REG_INC. REGNO must refer to a hard register. */
int
-regno_clobbered_p (regno, insn, mode, sets)
- unsigned int regno;
- rtx insn;
- enum machine_mode mode;
- int sets;
+regno_clobbered_p (unsigned int regno, rtx insn, enum machine_mode mode,
+ int sets)
{
- unsigned int nregs = HARD_REGNO_NREGS (regno, mode);
- unsigned int endregno = regno + nregs;
+ unsigned int nregs, endregno;
+
+ /* regno must be a hard register. */
+ gcc_assert (regno < FIRST_PSEUDO_REGISTER);
+
+ nregs = hard_regno_nregs[regno][mode];
+ endregno = regno + nregs;
if ((GET_CODE (PATTERN (insn)) == CLOBBER
- || (sets && GET_CODE (PATTERN (insn)) == SET))
- && GET_CODE (XEXP (PATTERN (insn), 0)) == REG)
+ || (sets == 1 && GET_CODE (PATTERN (insn)) == SET))
+ && REG_P (XEXP (PATTERN (insn), 0)))
{
unsigned int test = REGNO (XEXP (PATTERN (insn), 0));
return test >= regno && test < endregno;
}
+ if (sets == 2 && reg_inc_found_and_valid_p (regno, endregno, insn))
+ return 1;
+
if (GET_CODE (PATTERN (insn)) == PARALLEL)
{
int i = XVECLEN (PATTERN (insn), 0) - 1;
{
rtx elt = XVECEXP (PATTERN (insn), 0, i);
if ((GET_CODE (elt) == CLOBBER
- || (sets && GET_CODE (PATTERN (insn)) == SET))
- && GET_CODE (XEXP (elt, 0)) == REG)
+ || (sets == 1 && GET_CODE (PATTERN (insn)) == SET))
+ && REG_P (XEXP (elt, 0)))
{
unsigned int test = REGNO (XEXP (elt, 0));
if (test >= regno && test < endregno)
return 1;
}
+ if (sets == 2
+ && reg_inc_found_and_valid_p (regno, endregno, elt))
+ return 1;
}
}
/* Find the low part, with mode MODE, of a hard regno RELOADREG. */
rtx
-reload_adjust_reg_for_mode (reloadreg, mode)
- rtx reloadreg;
- enum machine_mode mode;
+reload_adjust_reg_for_mode (rtx reloadreg, enum machine_mode mode)
{
int regno;
regno = REGNO (reloadreg);
if (WORDS_BIG_ENDIAN)
- regno += HARD_REGNO_NREGS (regno, GET_MODE (reloadreg))
- - HARD_REGNO_NREGS (regno, mode);
+ regno += (int) hard_regno_nregs[regno][GET_MODE (reloadreg)]
+ - (int) hard_regno_nregs[regno][mode];
return gen_rtx_REG (mode, regno);
}
"RELOAD_FOR_OTHER_ADDRESS"
};
-static const char * const reg_class_names[] = REG_CLASS_NAMES;
-
/* These functions are used to print the variables set by 'find_reloads' */
void
-debug_reload_to_stream (f)
- FILE *f;
+debug_reload_to_stream (FILE *f)
{
int r;
const char *prefix;
}
void
-debug_reload ()
+debug_reload (void)
{
debug_reload_to_stream (stderr);
}
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