/* Save and restore call-clobbered registers which are live across a call.
- Copyright (C) 1989, 1992, 1994, 1995, 1997, 1998,
- 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
+ Copyright (C) 1989, 1992, 1994, 1995, 1997, 1998, 1999, 2000,
+ 2001, 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
-Software Foundation; either version 2, or (at your option) any later
+Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
for more details.
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. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
#include "rtl.h"
+#include "regs.h"
#include "insn-config.h"
#include "flags.h"
-#include "regs.h"
#include "hard-reg-set.h"
#include "recog.h"
#include "basic-block.h"
#include "expr.h"
#include "toplev.h"
#include "tm_p.h"
+#include "addresses.h"
+#include "df.h"
+#include "ggc.h"
#ifndef MAX_MOVE_MAX
#define MAX_MOVE_MAX MOVE_MAX
register because it is live we first try to save in multi-register modes.
If that is not possible the save is done one register at a time. */
-static enum machine_mode
+static enum machine_mode
regno_save_mode[FIRST_PSEUDO_REGISTER][MAX_MOVE_MAX / MIN_UNITS_PER_WORD + 1];
/* For each hard register, a place on the stack where it can be saved,
if needed. */
-static rtx
+static rtx
regno_save_mem[FIRST_PSEUDO_REGISTER][MAX_MOVE_MAX / MIN_UNITS_PER_WORD + 1];
/* We will only make a register eligible for caller-save if it can be
be recognized. */
static int
- reg_save_code[FIRST_PSEUDO_REGISTER][MAX_MACHINE_MODE];
-static int
- reg_restore_code[FIRST_PSEUDO_REGISTER][MAX_MACHINE_MODE];
+ cached_reg_save_code[FIRST_PSEUDO_REGISTER][MAX_MACHINE_MODE];
+static int
+ cached_reg_restore_code[FIRST_PSEUDO_REGISTER][MAX_MACHINE_MODE];
/* Set of hard regs currently residing in save area (during insn scan). */
insn. */
static HARD_REG_SET referenced_regs;
-/* Computed in mark_set_regs, holds all registers set by the current
- instruction. */
-static HARD_REG_SET this_insn_sets;
-
-
-static void mark_set_regs PARAMS ((rtx, rtx, void *));
-static void mark_referenced_regs PARAMS ((rtx));
-static int insert_save PARAMS ((struct insn_chain *, int, int,
- HARD_REG_SET *,
- enum machine_mode *));
-static int insert_restore PARAMS ((struct insn_chain *, int, int,
- int, enum machine_mode *));
-static struct insn_chain *insert_one_insn PARAMS ((struct insn_chain *, int,
- int, rtx));
-static void add_stored_regs PARAMS ((rtx, rtx, void *));
+
+static void mark_set_regs (rtx, const_rtx, void *);
+static void mark_referenced_regs (rtx);
+static int insert_save (struct insn_chain *, int, int, HARD_REG_SET *,
+ enum machine_mode *);
+static int insert_restore (struct insn_chain *, int, int, int,
+ enum machine_mode *);
+static struct insn_chain *insert_one_insn (struct insn_chain *, int, int,
+ rtx);
+static void add_stored_regs (rtx, const_rtx, void *);
+\f
+static GTY(()) rtx savepat;
+static GTY(()) rtx restpat;
+static GTY(()) rtx test_reg;
+static GTY(()) rtx test_mem;
+static GTY(()) rtx saveinsn;
+static GTY(()) rtx restinsn;
+
+/* Return the INSN_CODE used to save register REG in mode MODE. */
+static int
+reg_save_code (int reg, enum machine_mode mode)
+{
+ bool ok;
+ if (cached_reg_save_code[reg][mode])
+ return cached_reg_save_code[reg][mode];
+ if (!HARD_REGNO_MODE_OK (reg, mode))
+ {
+ cached_reg_save_code[reg][mode] = -1;
+ cached_reg_restore_code[reg][mode] = -1;
+ return -1;
+ }
+
+ /* Update the register number and modes of the register
+ and memory operand. */
+ SET_REGNO (test_reg, reg);
+ PUT_MODE (test_reg, mode);
+ PUT_MODE (test_mem, mode);
+
+ /* Force re-recognition of the modified insns. */
+ INSN_CODE (saveinsn) = -1;
+ INSN_CODE (restinsn) = -1;
+
+ cached_reg_save_code[reg][mode] = recog_memoized (saveinsn);
+ cached_reg_restore_code[reg][mode] = recog_memoized (restinsn);
+
+ /* Now extract both insns and see if we can meet their
+ constraints. */
+ ok = (cached_reg_save_code[reg][mode] != -1
+ && cached_reg_restore_code[reg][mode] != -1);
+ if (ok)
+ {
+ extract_insn (saveinsn);
+ ok = constrain_operands (1);
+ extract_insn (restinsn);
+ ok &= constrain_operands (1);
+ }
+
+ if (! ok)
+ {
+ cached_reg_save_code[reg][mode] = -1;
+ cached_reg_restore_code[reg][mode] = -1;
+ }
+ gcc_assert (cached_reg_save_code[reg][mode]);
+ return cached_reg_save_code[reg][mode];
+}
+
+/* Return the INSN_CODE used to restore register REG in mode MODE. */
+static int
+reg_restore_code (int reg, enum machine_mode mode)
+{
+ if (cached_reg_restore_code[reg][mode])
+ return cached_reg_restore_code[reg][mode];
+ /* Populate our cache. */
+ reg_save_code (reg, mode);
+ return cached_reg_restore_code[reg][mode];
+}
\f
/* Initialize for caller-save.
Look at all the hard registers that are used by a call and for which
regclass.c has not already excluded from being used across a call.
- Ensure that we can find a mode to save the register and that there is a
+ Ensure that we can find a mode to save the register and that there is a
simple insn to save and restore the register. This latter check avoids
problems that would occur if we tried to save the MQ register of some
machines directly into memory. */
void
-init_caller_save ()
+init_caller_save (void)
{
rtx addr_reg;
int offset;
rtx address;
int i, j;
- enum machine_mode mode;
/* First find all the registers that we need to deal with and all
the modes that they can have. If we can't find a mode to use,
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
if (TEST_HARD_REG_BIT
(reg_class_contents
- [(int) MODE_BASE_REG_CLASS (regno_save_mode [i][1])], i))
+ [(int) base_reg_class (regno_save_mode [i][1], PLUS, CONST_INT)], i))
break;
- if (i == FIRST_PSEUDO_REGISTER)
- abort ();
+ gcc_assert (i < FIRST_PSEUDO_REGISTER);
addr_reg = gen_rtx_REG (Pmode, i);
address = addr_reg;
/* Next we try to form an insn to save and restore the register. We
- see if such an insn is recognized and meets its constraints. */
+ see if such an insn is recognized and meets its constraints.
- start_sequence ();
+ To avoid lots of unnecessary RTL allocation, we construct all the RTL
+ once, then modify the memory and register operands in-place. */
- for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
- for (mode = 0 ; mode < MAX_MACHINE_MODE; mode++)
- if (HARD_REGNO_MODE_OK (i, mode))
- {
- rtx mem = gen_rtx_MEM (mode, address);
- rtx reg = gen_rtx_REG (mode, i);
- rtx savepat = gen_rtx_SET (VOIDmode, mem, reg);
- rtx restpat = gen_rtx_SET (VOIDmode, reg, mem);
- rtx saveinsn = emit_insn (savepat);
- rtx restinsn = emit_insn (restpat);
- int ok;
-
- reg_save_code[i][mode] = recog_memoized (saveinsn);
- reg_restore_code[i][mode] = recog_memoized (restinsn);
-
- /* Now extract both insns and see if we can meet their
- constraints. */
- ok = (reg_save_code[i][mode] != -1
- && reg_restore_code[i][mode] != -1);
- if (ok)
- {
- extract_insn (saveinsn);
- ok = constrain_operands (1);
- extract_insn (restinsn);
- ok &= constrain_operands (1);
- }
+ test_reg = gen_rtx_REG (VOIDmode, 0);
+ test_mem = gen_rtx_MEM (VOIDmode, address);
+ savepat = gen_rtx_SET (VOIDmode, test_mem, test_reg);
+ restpat = gen_rtx_SET (VOIDmode, test_reg, test_mem);
+
+ saveinsn = gen_rtx_INSN (VOIDmode, 0, 0, 0, 0, 0, savepat, -1, 0);
+ restinsn = gen_rtx_INSN (VOIDmode, 0, 0, 0, 0, 0, restpat, -1, 0);
- if (! ok)
- {
- reg_save_code[i][mode] = -1;
- reg_restore_code[i][mode] = -1;
- }
- }
- else
- {
- reg_save_code[i][mode] = -1;
- reg_restore_code[i][mode] = -1;
- }
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
for (j = 1; j <= MOVE_MAX_WORDS; j++)
- if (reg_save_code [i][regno_save_mode[i][j]] == -1)
+ if (reg_save_code (i,regno_save_mode[i][j]) == -1)
{
regno_save_mode[i][j] = VOIDmode;
if (j == 1)
SET_HARD_REG_BIT (call_fixed_reg_set, i);
}
}
-
- end_sequence ();
}
\f
/* Initialize save areas by showing that we haven't allocated any yet. */
void
-init_save_areas ()
+init_save_areas (void)
{
int i, j;
Future work:
In the fallback case we should iterate backwards across all possible
- modes for the save, choosing the largest available one instead of
+ modes for the save, choosing the largest available one instead of
falling back to the smallest mode immediately. (eg TF -> DF -> SF).
We do not try to use "move multiple" instructions that exist
- on some machines (such as the 68k moveml). It could be a win to try
+ on some machines (such as the 68k moveml). It could be a win to try
and use them when possible. The hard part is doing it in a way that is
- machine independent since they might be saving non-consecutive
+ machine independent since they might be saving non-consecutive
registers. (imagine caller-saving d0,d1,a0,a1 on the 68k) */
void
-setup_save_areas ()
+setup_save_areas (void)
{
int i, j, k;
unsigned int r;
if (reg_renumber[i] >= 0 && REG_N_CALLS_CROSSED (i) > 0)
{
unsigned int regno = reg_renumber[i];
- unsigned int endregno
- = regno + HARD_REGNO_NREGS (regno, GET_MODE (regno_reg_rtx[i]));
+ unsigned int endregno
+ = end_hard_regno (GET_MODE (regno_reg_rtx[i]), regno);
for (r = regno; r < endregno; r++)
if (call_used_regs[r])
/* Find the places where hard regs are live across calls and save them. */
void
-save_call_clobbered_regs ()
+save_call_clobbered_regs (void)
{
struct insn_chain *chain, *next;
enum machine_mode save_mode [FIRST_PSEUDO_REGISTER];
+ /* Computed in mark_set_regs, holds all registers set by the current
+ instruction. */
+ HARD_REG_SET this_insn_sets;
+
CLEAR_HARD_REG_SET (hard_regs_saved);
n_regs_saved = 0;
next = chain->next;
- if (chain->is_caller_save_insn)
- abort ();
+ gcc_assert (!chain->is_caller_save_insn);
- if (GET_RTX_CLASS (code) == 'i')
+ if (INSN_P (insn))
{
/* If some registers have been saved, see if INSN references
any of them. We must restore them before the insn if so. */
regno += insert_restore (chain, 1, regno, MOVE_MAX_WORDS, save_mode);
}
- if (code == CALL_INSN)
+ if (code == CALL_INSN
+ && ! SIBLING_CALL_P (insn)
+ && ! find_reg_note (insn, REG_NORETURN, NULL))
{
- int regno;
+ unsigned regno;
HARD_REG_SET hard_regs_to_save;
+ reg_set_iterator rsi;
/* Use the register life information in CHAIN to compute which
regs are live during the call. */
/* Look through all live pseudos, mark their hard registers
and choose proper mode for saving. */
EXECUTE_IF_SET_IN_REG_SET
- (&chain->live_throughout, FIRST_PSEUDO_REGISTER, regno,
- {
- int r = reg_renumber[regno];
- int nregs;
-
- if (r >= 0)
- {
- enum machine_mode mode;
-
- nregs = HARD_REGNO_NREGS (r, PSEUDO_REGNO_MODE (regno));
- mode = HARD_REGNO_CALLER_SAVE_MODE
- (r, nregs, PSEUDO_REGNO_MODE (regno));
- if (GET_MODE_BITSIZE (mode)
- > GET_MODE_BITSIZE (save_mode[r]))
- save_mode[r] = mode;
- while (nregs-- > 0)
- SET_HARD_REG_BIT (hard_regs_to_save, r + nregs);
- }
- else
- abort ();
- });
+ (&chain->live_throughout, FIRST_PSEUDO_REGISTER, regno, rsi)
+ {
+ int r = reg_renumber[regno];
+ int nregs;
+ enum machine_mode mode;
+
+ gcc_assert (r >= 0);
+ nregs = hard_regno_nregs[r][PSEUDO_REGNO_MODE (regno)];
+ mode = HARD_REGNO_CALLER_SAVE_MODE
+ (r, nregs, PSEUDO_REGNO_MODE (regno));
+ if (GET_MODE_BITSIZE (mode)
+ > GET_MODE_BITSIZE (save_mode[r]))
+ save_mode[r] = mode;
+ while (nregs-- > 0)
+ SET_HARD_REG_BIT (hard_regs_to_save, r + nregs);
+ }
/* Record all registers set in this call insn. These don't need
to be saved. N.B. the call insn might set a subreg of a
multi-hard-reg pseudo; then the pseudo is considered live
during the call, but the subreg that is set isn't. */
CLEAR_HARD_REG_SET (this_insn_sets);
- note_stores (PATTERN (insn), mark_set_regs, NULL);
+ note_stores (PATTERN (insn), mark_set_regs, &this_insn_sets);
/* Compute which hard regs must be saved before this call. */
AND_COMPL_HARD_REG_SET (hard_regs_to_save, call_fixed_reg_set);
if (n_regs_saved)
for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++)
if (TEST_HARD_REG_BIT (hard_regs_saved, regno))
- regno += insert_restore (chain, GET_CODE (insn) == JUMP_INSN,
+ regno += insert_restore (chain, JUMP_P (insn),
regno, MOVE_MAX_WORDS, save_mode);
}
- }
+ }
}
-/* Here from note_stores when an insn stores a value in a register.
+/* Here from note_stores, or directly from save_call_clobbered_regs, when
+ an insn stores a value in a register.
Set the proper bit or bits in this_insn_sets. All pseudos that have
been assigned hard regs have had their register number changed already,
so we can ignore pseudos. */
static void
-mark_set_regs (reg, setter, data)
- rtx reg;
- rtx setter ATTRIBUTE_UNUSED;
- void *data ATTRIBUTE_UNUSED;
+mark_set_regs (rtx reg, const_rtx setter ATTRIBUTE_UNUSED, void *data)
{
int regno, endregno, i;
- enum machine_mode mode = GET_MODE (reg);
+ HARD_REG_SET *this_insn_sets = data;
if (GET_CODE (reg) == SUBREG)
{
rtx inner = SUBREG_REG (reg);
- if (GET_CODE (inner) != REG || REGNO (inner) >= FIRST_PSEUDO_REGISTER)
+ if (!REG_P (inner) || REGNO (inner) >= FIRST_PSEUDO_REGISTER)
return;
-
- regno = subreg_hard_regno (reg, 1);
+ regno = subreg_regno (reg);
+ endregno = regno + subreg_nregs (reg);
}
- else if (GET_CODE (reg) == REG
+ else if (REG_P (reg)
&& REGNO (reg) < FIRST_PSEUDO_REGISTER)
- regno = REGNO (reg);
+ {
+ regno = REGNO (reg);
+ endregno = END_HARD_REGNO (reg);
+ }
else
return;
- endregno = regno + HARD_REGNO_NREGS (regno, mode);
-
for (i = regno; i < endregno; i++)
- SET_HARD_REG_BIT (this_insn_sets, i);
+ SET_HARD_REG_BIT (*this_insn_sets, i);
}
/* Here from note_stores when an insn stores a value in a register.
been assigned hard regs have had their register number changed already,
so we can ignore pseudos. */
static void
-add_stored_regs (reg, setter, data)
- rtx reg;
- rtx setter;
- void *data;
+add_stored_regs (rtx reg, const_rtx setter, void *data)
{
int regno, endregno, i;
enum machine_mode mode = GET_MODE (reg);
if (GET_CODE (setter) == CLOBBER)
return;
- if (GET_CODE (reg) == SUBREG && GET_CODE (SUBREG_REG (reg)) == REG)
+ if (GET_CODE (reg) == SUBREG
+ && REG_P (SUBREG_REG (reg))
+ && REGNO (SUBREG_REG (reg)) < FIRST_PSEUDO_REGISTER)
{
offset = subreg_regno_offset (REGNO (SUBREG_REG (reg)),
GET_MODE (SUBREG_REG (reg)),
SUBREG_BYTE (reg),
GET_MODE (reg));
- reg = SUBREG_REG (reg);
+ regno = REGNO (SUBREG_REG (reg)) + offset;
+ endregno = regno + subreg_nregs (reg);
}
+ else
+ {
+ if (!REG_P (reg) || REGNO (reg) >= FIRST_PSEUDO_REGISTER)
+ return;
- if (GET_CODE (reg) != REG || REGNO (reg) >= FIRST_PSEUDO_REGISTER)
- return;
-
- regno = REGNO (reg) + offset;
- endregno = regno + HARD_REGNO_NREGS (regno, mode);
+ regno = REGNO (reg) + offset;
+ endregno = end_hard_regno (mode, regno);
+ }
for (i = regno; i < endregno; i++)
SET_REGNO_REG_SET ((regset) data, i);
/* Walk X and record all referenced registers in REFERENCED_REGS. */
static void
-mark_referenced_regs (x)
- rtx x;
+mark_referenced_regs (rtx x)
{
enum rtx_code code = GET_CODE (x);
const char *fmt;
{
x = SET_DEST (x);
code = GET_CODE (x);
- if (code == REG || code == PC || code == CC0
- || (code == SUBREG && GET_CODE (SUBREG_REG (x)) == REG
+ if ((code == REG && REGNO (x) < FIRST_PSEUDO_REGISTER)
+ || code == PC || code == CC0
+ || (code == SUBREG && REG_P (SUBREG_REG (x))
+ && REGNO (SUBREG_REG (x)) < FIRST_PSEUDO_REGISTER
/* If we're setting only part of a multi-word register,
we shall mark it as referenced, because the words
that are not being set should be restored. */
: reg_renumber[regno]);
if (hardregno >= 0)
- {
- int nregs = HARD_REGNO_NREGS (hardregno, GET_MODE (x));
- while (nregs-- > 0)
- SET_HARD_REG_BIT (referenced_regs, hardregno + nregs);
- }
+ add_to_hard_reg_set (&referenced_regs, GET_MODE (x), hardregno);
/* If this is a pseudo that did not get a hard register, scan its
memory location, since it might involve the use of another
register, which might be saved. */
Return the extra number of registers saved. */
static int
-insert_restore (chain, before_p, regno, maxrestore, save_mode)
- struct insn_chain *chain;
- int before_p;
- int regno;
- int maxrestore;
- enum machine_mode *save_mode;
+insert_restore (struct insn_chain *chain, int before_p, int regno,
+ int maxrestore, enum machine_mode *save_mode)
{
int i, k;
rtx pat = NULL_RTX;
struct insn_chain *new;
rtx mem;
- /* A common failure mode if register status is not correct in the RTL
- is for this routine to be called with a REGNO we didn't expect to
- save. That will cause us to write an insn with a (nil) SET_DEST
- or SET_SRC. Instead of doing so and causing a crash later, check
- for this common case and abort here instead. This will remove one
- step in debugging such problems. */
-
- if (regno_save_mem[regno][1] == 0)
- abort ();
+ /* A common failure mode if register status is not correct in the
+ RTL is for this routine to be called with a REGNO we didn't
+ expect to save. That will cause us to write an insn with a (nil)
+ SET_DEST or SET_SRC. Instead of doing so and causing a crash
+ later, check for this common case here instead. This will remove
+ one step in debugging such problems. */
+ gcc_assert (regno_save_mem[regno][1]);
/* Get the pattern to emit and update our status.
ok = 0;
break;
}
- /* Must do this one restore at a time */
+ /* Must do this one restore at a time. */
if (! ok)
continue;
mem = regno_save_mem [regno][numregs];
if (save_mode [regno] != VOIDmode
&& save_mode [regno] != GET_MODE (mem)
- && numregs == (unsigned int) HARD_REGNO_NREGS (regno, save_mode [regno]))
+ && numregs == (unsigned int) hard_regno_nregs[regno][save_mode [regno]])
mem = adjust_address (mem, save_mode[regno], 0);
+ else
+ mem = copy_rtx (mem);
pat = gen_rtx_SET (VOIDmode,
- gen_rtx_REG (GET_MODE (mem),
+ gen_rtx_REG (GET_MODE (mem),
regno), mem);
- code = reg_restore_code[regno][GET_MODE (mem)];
+ code = reg_restore_code (regno, GET_MODE (mem));
new = insert_one_insn (chain, before_p, code, pat);
/* Clear status for all registers we restored. */
n_regs_saved--;
}
- /* Tell our callers how many extra registers we saved/restored */
+ /* Tell our callers how many extra registers we saved/restored. */
return numregs - 1;
}
/* Like insert_restore above, but save registers instead. */
static int
-insert_save (chain, before_p, regno, to_save, save_mode)
- struct insn_chain *chain;
- int before_p;
- int regno;
- HARD_REG_SET *to_save;
- enum machine_mode *save_mode;
+insert_save (struct insn_chain *chain, int before_p, int regno,
+ HARD_REG_SET (*to_save), enum machine_mode *save_mode)
{
int i;
unsigned int k;
struct insn_chain *new;
rtx mem;
- /* A common failure mode if register status is not correct in the RTL
- is for this routine to be called with a REGNO we didn't expect to
- save. That will cause us to write an insn with a (nil) SET_DEST
- or SET_SRC. Instead of doing so and causing a crash later, check
- for this common case and abort here instead. This will remove one
+ /* A common failure mode if register status is not correct in the
+ RTL is for this routine to be called with a REGNO we didn't
+ expect to save. That will cause us to write an insn with a (nil)
+ SET_DEST or SET_SRC. Instead of doing so and causing a crash
+ later, check for this common case here. This will remove one
step in debugging such problems. */
-
- if (regno_save_mem[regno][1] == 0)
- abort ();
+ gcc_assert (regno_save_mem[regno][1]);
/* Get the pattern to emit and update our status.
- See if we can save several registers with a single instruction.
+ See if we can save several registers with a single instruction.
Work backwards to the single register case. */
for (i = MOVE_MAX_WORDS; i > 0; i--)
{
ok = 0;
break;
}
- /* Must do this one save at a time */
+ /* Must do this one save at a time. */
if (! ok)
continue;
mem = regno_save_mem [regno][numregs];
if (save_mode [regno] != VOIDmode
&& save_mode [regno] != GET_MODE (mem)
- && numregs == (unsigned int) HARD_REGNO_NREGS (regno, save_mode [regno]))
+ && numregs == (unsigned int) hard_regno_nregs[regno][save_mode [regno]])
mem = adjust_address (mem, save_mode[regno], 0);
+ else
+ mem = copy_rtx (mem);
pat = gen_rtx_SET (VOIDmode, mem,
gen_rtx_REG (GET_MODE (mem),
regno));
- code = reg_save_code[regno][GET_MODE (mem)];
+ code = reg_save_code (regno, GET_MODE (mem));
new = insert_one_insn (chain, before_p, code, pat);
/* Set hard_regs_saved and dead_or_set for all the registers we saved. */
n_regs_saved++;
}
- /* Tell our callers how many extra registers we saved/restored */
+ /* Tell our callers how many extra registers we saved/restored. */
return numregs - 1;
}
/* Emit a new caller-save insn and set the code. */
static struct insn_chain *
-insert_one_insn (chain, before_p, code, pat)
- struct insn_chain *chain;
- int before_p;
- int code;
- rtx pat;
+insert_one_insn (struct insn_chain *chain, int before_p, int code, rtx pat)
{
rtx insn = chain->insn;
struct insn_chain *new;
-
+
#ifdef HAVE_cc0
/* If INSN references CC0, put our insns in front of the insn that sets
CC0. This is always safe, since the only way we could be passed an
isn't a problem. We do, however, assume here that CALL_INSNs don't
reference CC0. Guard against non-INSN's like CODE_LABEL. */
- if ((GET_CODE (insn) == INSN || GET_CODE (insn) == JUMP_INSN)
+ if ((NONJUMP_INSN_P (insn) || JUMP_P (insn))
&& before_p
&& reg_referenced_p (cc0_rtx, PATTERN (insn)))
chain = chain->prev, insn = chain->insn;
rtx reg = XEXP (link, 0);
int regno, i;
- if (GET_CODE (reg) != REG)
- abort ();
-
+ gcc_assert (REG_P (reg));
regno = REGNO (reg);
if (regno >= FIRST_PSEUDO_REGISTER)
regno = reg_renumber[regno];
if (regno < 0)
continue;
- for (i = HARD_REGNO_NREGS (regno, GET_MODE (reg)) - 1;
+ for (i = hard_regno_nregs[regno][GET_MODE (reg)] - 1;
i >= 0; i--)
SET_REGNO_REG_SET (&new->live_throughout, regno + i);
}
}
+
+ /* If CHAIN->INSN is a call, then the registers which contain
+ the arguments to the function are live in the new insn. */
+ if (CALL_P (chain->insn))
+ {
+ for (link = CALL_INSN_FUNCTION_USAGE (chain->insn);
+ link != NULL_RTX;
+ link = XEXP (link, 1))
+ {
+ rtx arg = XEXP (link, 0);
+
+ if (GET_CODE (arg) == USE)
+ {
+ rtx reg = XEXP (arg, 0);
+
+ if (REG_P (reg))
+ {
+ int i, regno = REGNO (reg);
+
+ /* Registers in CALL_INSN_FUNCTION_USAGE are always
+ hard registers. */
+ gcc_assert (regno < FIRST_PSEUDO_REGISTER);
+
+ for (i = hard_regno_nregs[regno][GET_MODE (reg)] - 1;
+ i >= 0; i--)
+ SET_REGNO_REG_SET (&new->live_throughout, regno + i);
+ }
+ }
+ }
+
+ }
+
CLEAR_REG_SET (&new->dead_or_set);
- if (chain->insn == BLOCK_HEAD (chain->block))
- BLOCK_HEAD (chain->block) = new->insn;
+ if (chain->insn == BB_HEAD (BASIC_BLOCK (chain->block)))
+ BB_HEAD (BASIC_BLOCK (chain->block)) = new->insn;
}
else
{
registers from the live sets, and observe REG_UNUSED notes. */
COPY_REG_SET (&new->live_throughout, &chain->live_throughout);
/* Registers that are set in CHAIN->INSN live in the new insn.
- (Unless there is a REG_UNUSED note for them, but we don't
+ (Unless there is a REG_UNUSED note for them, but we don't
look for them here.) */
note_stores (PATTERN (chain->insn), add_stored_regs,
&new->live_throughout);
CLEAR_REG_SET (&new->dead_or_set);
- if (chain->insn == BLOCK_END (chain->block))
- BLOCK_END (chain->block) = new->insn;
+ if (chain->insn == BB_END (BASIC_BLOCK (chain->block)))
+ BB_END (BASIC_BLOCK (chain->block)) = new->insn;
}
new->block = chain->block;
new->is_caller_save_insn = 1;
INSN_CODE (new->insn) = code;
return new;
}
+#include "gt-caller-save.h"
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