X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Fcaller-save.c;h=82672e0c9151ef680262a1227ae27c98f48a437e;hb=c6a0599243068b33768268296b067d0fce5feec9;hp=c5baa1321b4dc131a73ff45c5e5c6a736e4bc596;hpb=19cb6b50cf92dfd40eb254e53f1a711c5f5e486d;p=pf3gnuchains%2Fgcc-fork.git diff --git a/gcc/caller-save.c b/gcc/caller-save.c index c5baa1321b4..82672e0c915 100644 --- a/gcc/caller-save.c +++ b/gcc/caller-save.c @@ -1,12 +1,12 @@ /* Save and restore call-clobbered registers which are live across a call. - Copyright (C) 1989, 1992, 1994, 1995, 1997, 1998, - 1999, 2000, 2001 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 @@ -15,16 +15,17 @@ FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 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 +. */ #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" @@ -33,6 +34,9 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA #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 @@ -49,13 +53,13 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA 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 @@ -65,9 +69,9 @@ static rtx 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). */ @@ -81,40 +85,98 @@ static int n_regs_saved; 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 *); + +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; + 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; + + 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]; +} /* 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, @@ -151,11 +213,12 @@ init_caller_save () that register in every mode we will use to save registers. */ for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) - if (TEST_HARD_REG_BIT (reg_class_contents[(int) BASE_REG_CLASS], i)) + if (TEST_HARD_REG_BIT + (reg_class_contents + [(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); @@ -177,51 +240,22 @@ init_caller_save () 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) @@ -230,14 +264,12 @@ init_caller_save () SET_HARD_REG_BIT (call_fixed_reg_set, i); } } - - end_sequence (); } /* Initialize save areas by showing that we haven't allocated any yet. */ void -init_save_areas () +init_save_areas (void) { int i, j; @@ -255,17 +287,17 @@ init_save_areas () 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; @@ -281,8 +313,8 @@ setup_save_areas () 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]) @@ -348,11 +380,15 @@ setup_save_areas () /* 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; @@ -363,10 +399,9 @@ save_call_clobbered_regs () 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. */ @@ -390,53 +425,51 @@ save_call_clobbered_regs () 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. */ REG_SET_TO_HARD_REG_SET (hard_regs_to_save, &chain->live_throughout); - /* Save hard registers always in the widest mode availble. */ + /* Save hard registers always in the widest mode available. */ for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) if (TEST_HARD_REG_BIT (hard_regs_to_save, regno)) save_mode [regno] = regno_save_mode [regno][1]; else save_mode [regno] = VOIDmode; - /* Look trought all live pseudos, mark their hard registers + /* 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); @@ -466,43 +499,42 @@ save_call_clobbered_regs () 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. @@ -510,10 +542,7 @@ mark_set_regs (reg, setter, data) 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); @@ -522,20 +551,25 @@ add_stored_regs (reg, setter, data) 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); @@ -543,8 +577,7 @@ add_stored_regs (reg, setter, data) /* 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; @@ -556,8 +589,10 @@ mark_referenced_regs (x) { 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. */ @@ -580,11 +615,7 @@ mark_referenced_regs (x) : 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. */ @@ -620,12 +651,8 @@ mark_referenced_regs (x) 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; @@ -634,15 +661,13 @@ insert_restore (chain, before_p, regno, maxrestore, save_mode) 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. @@ -662,7 +687,7 @@ insert_restore (chain, before_p, regno, maxrestore, save_mode) ok = 0; break; } - /* Must do this one restore at a time */ + /* Must do this one restore at a time. */ if (! ok) continue; @@ -673,12 +698,14 @@ insert_restore (chain, before_p, regno, maxrestore, save_mode) mem = regno_save_mem [regno][numregs]; if (save_mode [regno] != VOIDmode && save_mode [regno] != GET_MODE (mem) - && numregs == 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. */ @@ -689,20 +716,15 @@ insert_restore (chain, before_p, regno, maxrestore, save_mode) 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; @@ -712,19 +734,17 @@ insert_save (chain, before_p, regno, to_save, save_mode) 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--) { @@ -739,7 +759,7 @@ insert_save (chain, before_p, regno, to_save, save_mode) ok = 0; break; } - /* Must do this one save at a time */ + /* Must do this one save at a time. */ if (! ok) continue; @@ -750,12 +770,14 @@ insert_save (chain, before_p, regno, to_save, save_mode) mem = regno_save_mem [regno][numregs]; if (save_mode [regno] != VOIDmode && save_mode [regno] != GET_MODE (mem) - && numregs == 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. */ @@ -766,21 +788,17 @@ insert_save (chain, before_p, regno, to_save, save_mode) 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 @@ -788,7 +806,7 @@ insert_one_insn (chain, before_p, code, pat) 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; @@ -819,22 +837,20 @@ insert_one_insn (chain, before_p, code, pat) 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); } } 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 { @@ -848,13 +864,13 @@ insert_one_insn (chain, before_p, code, pat) 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; @@ -862,3 +878,4 @@ insert_one_insn (chain, before_p, code, pat) INSN_CODE (new->insn) = code; return new; } +#include "gt-caller-save.h"