X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Freload.h;h=38d340fd5cd63f17e7c17430c02ddfa31dbfde85;hb=6776dec81181ac5268babea9d9e258e8c2ea02b7;hp=6fe814f1752db968ae1a7ae766715bd2a0215986;hpb=974e2c0c09fddfcf5ad9999a0324e74ed83e9b9a;p=pf3gnuchains%2Fgcc-fork.git diff --git a/gcc/reload.h b/gcc/reload.h index 6fe814f1752..38d340fd5cd 100644 --- a/gcc/reload.h +++ b/gcc/reload.h @@ -1,6 +1,6 @@ /* Communication between reload.c and reload1.c. Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1997, 1998, - 1999, 2000, 2001 Free Software Foundation, Inc. + 1999, 2000, 2001, 2003, 2004 Free Software Foundation, Inc. This file is part of GCC. @@ -16,8 +16,8 @@ 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. */ +Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301, USA. */ /* If secondary reloads are the same for inputs and outputs, define those @@ -30,21 +30,12 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA SECONDARY_RELOAD_CLASS (CLASS, MODE, X) #endif -/* If either macro is defined, show that we need secondary reloads. */ -#if defined(SECONDARY_INPUT_RELOAD_CLASS) || defined(SECONDARY_OUTPUT_RELOAD_CLASS) -#define HAVE_SECONDARY_RELOADS -#endif - /* If MEMORY_MOVE_COST isn't defined, give it a default here. */ #ifndef MEMORY_MOVE_COST -#ifdef HAVE_SECONDARY_RELOADS #define MEMORY_MOVE_COST(MODE,CLASS,IN) \ (4 + memory_move_secondary_cost ((MODE), (CLASS), (IN))) -#else -#define MEMORY_MOVE_COST(MODE,CLASS,IN) 4 -#endif #endif -extern int memory_move_secondary_cost PARAMS ((enum machine_mode, enum reg_class, int)); +extern int memory_move_secondary_cost (enum machine_mode, enum reg_class, int); /* Maximum number of reloads we can need. */ #define MAX_RELOADS (2 * MAX_RECOG_OPERANDS * (MAX_REGS_PER_ADDRESS + 1)) @@ -68,14 +59,14 @@ extern int memory_move_secondary_cost PARAMS ((enum machine_mode, enum reg_class reloads; usually secondary reloads RELOAD_OTHER none of the above, usually multiple uses RELOAD_FOR_OTHER_ADDRESS reload for part of the address of an input - that is marked RELOAD_OTHER. + that is marked RELOAD_OTHER. This used to be "enum reload_when_needed" but some debuggers have trouble with an enum tag and variable of the same name. */ enum reload_type { - RELOAD_FOR_INPUT, RELOAD_FOR_OUTPUT, RELOAD_FOR_INSN, + RELOAD_FOR_INPUT, RELOAD_FOR_OUTPUT, RELOAD_FOR_INSN, RELOAD_FOR_INPUT_ADDRESS, RELOAD_FOR_INPADDR_ADDRESS, RELOAD_FOR_OUTPUT_ADDRESS, RELOAD_FOR_OUTADDR_ADDRESS, RELOAD_FOR_OPERAND_ADDRESS, RELOAD_FOR_OPADDR_ADDR, @@ -147,7 +138,7 @@ struct reload addressing an output, for addressing a non-reloaded mem ref, or for unspecified purposes (i.e., more than one of the above). */ enum reload_type when_needed; - + /* Nonzero for an optional reload. Optional reloads are ignored unless the value is already sitting in a register. */ unsigned int optional:1; @@ -164,10 +155,20 @@ extern struct reload rld[MAX_RELOADS]; extern int n_reloads; #endif +extern GTY (()) VEC(rtx,gc) *reg_equiv_memory_loc_vec; extern rtx *reg_equiv_constant; +extern rtx *reg_equiv_invariant; extern rtx *reg_equiv_memory_loc; extern rtx *reg_equiv_address; extern rtx *reg_equiv_mem; +extern rtx *reg_equiv_alt_mem_list; + +/* Element N is the list of insns that initialized reg N from its equivalent + constant or memory slot. */ +extern GTY((length("reg_equiv_init_size"))) rtx *reg_equiv_init; + +/* The size of the previous array, for GC purposes. */ +extern GTY(()) int reg_equiv_init_size; /* All the "earlyclobber" operands of the current insn are recorded here. */ @@ -192,18 +193,11 @@ extern char double_reg_address_ok; extern int num_not_at_initial_offset; -struct needs -{ - /* [0] is normal, [1] is nongroup. */ - short regs[2][N_REG_CLASSES]; - short groups[N_REG_CLASSES]; -}; - #if defined SET_HARD_REG_BIT && defined CLEAR_REG_SET /* This structure describes instructions which are relevant for reload. Apart from all regular insns, this also includes CODE_LABELs, since they must be examined for register elimination. */ -struct insn_chain +struct insn_chain { /* Links to the neighbor instructions. */ struct insn_chain *next, *prev; @@ -228,9 +222,6 @@ struct insn_chain /* Indicates which registers have already been used for spills. */ HARD_REG_SET used_spill_regs; - /* Describe the needs for reload registers of this insn. */ - struct needs need; - /* Nonzero if find_reloads said the insn requires reloading. */ unsigned int need_reload:1; /* Nonzero if find_reloads needs to be run during reload_as_needed to @@ -247,141 +238,136 @@ struct insn_chain extern struct insn_chain *reload_insn_chain; /* Allocate a new insn_chain structure. */ -extern struct insn_chain *new_insn_chain PARAMS ((void)); +extern struct insn_chain *new_insn_chain (void); -extern void compute_use_by_pseudos PARAMS ((HARD_REG_SET *, regset)); +extern void compute_use_by_pseudos (HARD_REG_SET *, regset); #endif /* Functions from reload.c: */ -/* Return a memory location that will be used to copy X in mode MODE. +extern enum reg_class secondary_reload_class (bool, enum reg_class, + enum machine_mode, rtx); + +#ifdef GCC_INSN_CODES_H +extern enum reg_class scratch_reload_class (enum insn_code); +#endif + +/* Return a memory location that will be used to copy X in mode MODE. If we haven't already made a location for this mode in this insn, call find_reloads_address on the location being returned. */ -extern rtx get_secondary_mem PARAMS ((rtx, enum machine_mode, - int, enum reload_type)); +extern rtx get_secondary_mem (rtx, enum machine_mode, int, enum reload_type); /* Clear any secondary memory locations we've made. */ -extern void clear_secondary_mem PARAMS ((void)); +extern void clear_secondary_mem (void); /* Transfer all replacements that used to be in reload FROM to be in reload TO. */ -extern void transfer_replacements PARAMS ((int, int)); +extern void transfer_replacements (int, int); /* IN_RTX is the value loaded by a reload that we now decided to inherit, or a subpart of it. If we have any replacements registered for IN_RTX, - chancel the reloads that were supposed to load them. - Return non-zero if we chanceled any reloads. */ -extern int remove_address_replacements PARAMS ((rtx in_rtx)); + cancel the reloads that were supposed to load them. + Return nonzero if we canceled any reloads. */ +extern int remove_address_replacements (rtx in_rtx); /* Like rtx_equal_p except that it allows a REG and a SUBREG to match if they are the same hard reg, and has special hacks for autoincrement and autodecrement. */ -extern int operands_match_p PARAMS ((rtx, rtx)); +extern int operands_match_p (rtx, rtx); /* Return 1 if altering OP will not modify the value of CLOBBER. */ -extern int safe_from_earlyclobber PARAMS ((rtx, rtx)); +extern int safe_from_earlyclobber (rtx, rtx); /* Search the body of INSN for values that need reloading and record them with push_reload. REPLACE nonzero means record also where the values occur so that subst_reloads can be used. */ -extern int find_reloads PARAMS ((rtx, int, int, int, short *)); +extern int find_reloads (rtx, int, int, int, short *); /* Compute the sum of X and Y, making canonicalizations assumed in an address, namely: sum constant integers, surround the sum of two constants with a CONST, put the constant as the second operand, and group the constant on the outermost sum. */ -extern rtx form_sum PARAMS ((rtx, rtx)); +extern rtx form_sum (rtx, rtx); /* Substitute into the current INSN the registers into which we have reloaded the things that need reloading. */ -extern void subst_reloads PARAMS ((rtx)); +extern void subst_reloads (rtx); /* Make a copy of any replacements being done into X and move those copies to locations in Y, a copy of X. We only look at the highest level of the RTL. */ -extern void copy_replacements PARAMS ((rtx, rtx)); +extern void copy_replacements (rtx, rtx); /* Change any replacements being done to *X to be done to *Y */ -extern void move_replacements PARAMS ((rtx *x, rtx *y)); +extern void move_replacements (rtx *x, rtx *y); /* If LOC was scheduled to be replaced by something, return the replacement. Otherwise, return *LOC. */ -extern rtx find_replacement PARAMS ((rtx *)); - -/* Return nonzero if register in range [REGNO, ENDREGNO) - appears either explicitly or implicitly in X - other than being stored into. */ -extern int refers_to_regno_for_reload_p PARAMS ((unsigned int, unsigned int, - rtx, rtx *)); +extern rtx find_replacement (rtx *); /* Nonzero if modifying X will affect IN. */ -extern int reg_overlap_mentioned_for_reload_p PARAMS ((rtx, rtx)); - -/* Return nonzero if anything in X contains a MEM. Look also for pseudo - registers. */ -extern int refers_to_mem_for_reload_p PARAMS ((rtx)); +extern int reg_overlap_mentioned_for_reload_p (rtx, rtx); /* Check the insns before INSN to see if there is a suitable register containing the same value as GOAL. */ -extern rtx find_equiv_reg PARAMS ((rtx, rtx, enum reg_class, int, short *, - int, enum machine_mode)); +extern rtx find_equiv_reg (rtx, rtx, enum reg_class, int, short *, + int, enum machine_mode); /* Return 1 if register REGNO is the subject of a clobber in insn INSN. */ -extern int regno_clobbered_p PARAMS ((unsigned int, rtx, enum machine_mode, - int)); +extern int regno_clobbered_p (unsigned int, rtx, enum machine_mode, int); /* Return 1 if X is an operand of an insn that is being earlyclobbered. */ -extern int earlyclobber_operand_p PARAMS ((rtx)); +extern int earlyclobber_operand_p (rtx); /* Record one reload that needs to be performed. */ -extern int push_reload PARAMS ((rtx, rtx, rtx *, rtx *, enum reg_class, - enum machine_mode, enum machine_mode, - int, int, int, enum reload_type)); +extern int push_reload (rtx, rtx, rtx *, rtx *, enum reg_class, + enum machine_mode, enum machine_mode, + int, int, int, enum reload_type); -/* Functions in reload1.c: */ +/* Functions in postreload.c: */ +extern void reload_cse_regs (rtx); -extern void reload_cse_regs PARAMS ((rtx)); -extern int reloads_conflict PARAMS ((int, int)); +/* Functions in reload1.c: */ /* Initialize the reload pass once per compilation. */ -extern void init_reload PARAMS ((void)); +extern void init_reload (void); /* The reload pass itself. */ -extern int reload PARAMS ((rtx, int)); +extern int reload (rtx, int); /* Mark the slots in regs_ever_live for the hard regs used by pseudo-reg number REGNO. */ -extern void mark_home_live PARAMS ((int)); +extern void mark_home_live (int); /* Scan X and replace any eliminable registers (such as fp) with a replacement (such as sp), plus an offset. */ -extern rtx eliminate_regs PARAMS ((rtx, enum machine_mode, rtx)); - -/* Emit code to perform a reload from IN (which may be a reload register) to - OUT (which may also be a reload register). IN or OUT is from operand - OPNUM with reload type TYPE. */ -extern rtx gen_reload PARAMS ((rtx, rtx, int, enum reload_type)); +extern rtx eliminate_regs (rtx, enum machine_mode, rtx); +extern bool elimination_target_reg_p (rtx); /* Deallocate the reload register used by reload number R. */ -extern void deallocate_reload_reg PARAMS ((int r)); +extern void deallocate_reload_reg (int r); /* Functions in caller-save.c: */ /* Initialize for caller-save. */ -extern void init_caller_save PARAMS ((void)); +extern void init_caller_save (void); /* Initialize save areas by showing that we haven't allocated any yet. */ -extern void init_save_areas PARAMS ((void)); +extern void init_save_areas (void); /* Allocate save areas for any hard registers that might need saving. */ -extern void setup_save_areas PARAMS ((void)); +extern void setup_save_areas (void); /* Find the places where hard regs are live across calls and save them. */ -extern void save_call_clobbered_regs PARAMS ((void)); +extern void save_call_clobbered_regs (void); /* Replace (subreg (reg)) with the appropriate (reg) for any operands. */ -extern void cleanup_subreg_operands PARAMS ((rtx)); +extern void cleanup_subreg_operands (rtx); /* Debugging support. */ -extern void debug_reload_to_stream PARAMS ((FILE *)); -extern void debug_reload PARAMS ((void)); +extern void debug_reload_to_stream (FILE *); +extern void debug_reload (void); + +/* Compute the actual register we should reload to, in case we're + reloading to/from a register that is wider than a word. */ +extern rtx reload_adjust_reg_for_mode (rtx, enum machine_mode);