/* Declarations for interface to insn recognizer and insn-output.c. Copyright (C) 1987, 1996, 1997, 1998, 1999 Free Software Foundation, Inc. This file is part of GNU CC. GNU CC 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 version. GNU CC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 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 GNU CC; see the file COPYING. If not, write to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* Random number that should be large enough for all purposes. */ #define MAX_RECOG_ALTERNATIVES 30 /* Types of operands. */ enum op_type { OP_IN, OP_OUT, OP_INOUT }; struct operand_alternative { /* Pointer to the beginning of the constraint string for this alternative, for easier access by alternative number. */ const char *constraint; /* The register class valid for this alternative (possibly NO_REGS). */ enum reg_class class; /* "Badness" of this alternative, computed from number of '?' and '!' characters in the constraint string. */ unsigned int reject; /* -1 if no matching constraint was found, or an operand number. */ int matches; /* The same information, but reversed: -1 if this operand is not matched by any other, or the operand number of the operand that matches this one. */ int matched; /* Nonzero if '&' was found in the constraint string. */ unsigned int earlyclobber:1; /* Nonzero if 'm' was found in the constraint string. */ unsigned int memory_ok:1; /* Nonzero if 'o' was found in the constraint string. */ unsigned int offmem_ok:1; /* Nonzero if 'V' was found in the constraint string. */ unsigned int nonoffmem_ok:1; /* Nonzero if '<' was found in the constraint string. */ unsigned int decmem_ok:1; /* Nonzero if '>' was found in the constraint string. */ unsigned int incmem_ok:1; /* Nonzero if 'X' was found in the constraint string, or if the constraint string for this alternative was empty. */ unsigned int anything_ok:1; }; extern void init_recog PROTO((void)); extern void init_recog_no_volatile PROTO((void)); extern int recog_memoized PROTO((rtx)); extern int check_asm_operands PROTO((rtx)); extern int asm_operand_ok PROTO((rtx, const char *)); extern int validate_change PROTO((rtx, rtx *, rtx, int)); extern int apply_change_group PROTO((void)); extern int num_validated_changes PROTO((void)); extern void cancel_changes PROTO((int)); extern int constrain_operands PROTO((int)); extern int memory_address_p PROTO((enum machine_mode, rtx)); extern int strict_memory_address_p PROTO((enum machine_mode, rtx)); extern int validate_replace_rtx PROTO((rtx, rtx, rtx)); extern void validate_replace_rtx_group PROTO((rtx, rtx, rtx)); extern int validate_replace_src PROTO((rtx, rtx, rtx)); #ifdef HAVE_cc0 extern int next_insn_tests_no_inequality PROTO ((rtx)); #endif extern int reg_fits_class_p PROTO((rtx, enum reg_class, int, enum machine_mode)); extern rtx *find_single_use PROTO((rtx, rtx, rtx *)); extern int general_operand PROTO((rtx, enum machine_mode)); extern int address_operand PROTO((rtx, enum machine_mode)); extern int register_operand PROTO((rtx, enum machine_mode)); extern int pmode_register_operand PROTO((rtx, enum machine_mode)); extern int scratch_operand PROTO((rtx, enum machine_mode)); extern int immediate_operand PROTO((rtx, enum machine_mode)); extern int const_int_operand PROTO((rtx, enum machine_mode)); extern int const_double_operand PROTO((rtx, enum machine_mode)); extern int nonimmediate_operand PROTO((rtx, enum machine_mode)); extern int nonmemory_operand PROTO((rtx, enum machine_mode)); extern int push_operand PROTO((rtx, enum machine_mode)); extern int pop_operand PROTO((rtx, enum machine_mode)); extern int memory_operand PROTO((rtx, enum machine_mode)); extern int indirect_operand PROTO((rtx, enum machine_mode)); extern int mode_independent_operand PROTO((rtx, enum machine_mode)); extern int comparison_operator PROTO((rtx, enum machine_mode)); extern int offsettable_memref_p PROTO((rtx)); extern int offsettable_nonstrict_memref_p PROTO((rtx)); extern int offsettable_address_p PROTO((int, enum machine_mode, rtx)); extern int mode_dependent_address_p PROTO((rtx)); extern int recog PROTO((rtx, rtx, int *)); extern void add_clobbers PROTO((rtx, int)); extern void insn_extract PROTO((rtx)); extern void extract_insn PROTO((rtx)); extern void preprocess_constraints PROTO((void)); extern rtx recog_next_insn PROTO((rtx, int)); extern void peephole2_optimize PROTO((FILE *)); extern rtx peephole2_insns PROTO((rtx, rtx, rtx *)); /* Nonzero means volatile operands are recognized. */ extern int volatile_ok; /* Set by constrain_operands to the number of the alternative that matched. */ extern int which_alternative; /* The following vectors hold the results from insn_extract. */ struct recog_data { /* It is very tempting to make the 5 operand related arrays into a structure and index on that. However, to be source compatible with all of the existing md file insn constraints and output templates, we need `operand' as a flat array. Without that member, making an array for the rest seems pointless. */ /* Gives value of operand N. */ rtx operand[MAX_RECOG_OPERANDS]; /* Gives location where operand N was found. */ rtx *operand_loc[MAX_RECOG_OPERANDS]; /* Gives the constraint string for operand N. */ const char *constraints[MAX_RECOG_OPERANDS]; /* Gives the mode of operand N. */ enum machine_mode operand_mode[MAX_RECOG_OPERANDS]; /* Gives the type (in, out, inout) for operand N. */ enum op_type operand_type[MAX_RECOG_OPERANDS]; /* Gives location where the Nth duplicate-appearance of an operand was found. This is something that matched MATCH_DUP. */ rtx *dup_loc[MAX_DUP_OPERANDS]; /* Gives the operand number that was duplicated in the Nth duplicate-appearance of an operand. */ char dup_num[MAX_DUP_OPERANDS]; /* ??? Note that these are `char' instead of `unsigned char' to (try to) avoid certain lossage from K&R C, wherein `unsigned char' default promotes to `unsigned int' instead of `int' as in ISO C. As of 1999, the most common places to bootstrap from K&R C are SunOS and HPUX, both of which have signed characters by default. The only other supported natives that have both K&R C and unsigned characters are ROMP and Irix 3, and neither have been seen for a while, but do continue to consider unsignedness when performing arithmetic inside a comparison. */ /* The number of operands of the insn. */ char n_operands; /* The number of MATCH_DUPs in the insn. */ char n_dups; /* The number of alternatives in the constraints for the insn. */ char n_alternatives; }; extern struct recog_data recog_data; /* Contains a vector of operand_alternative structures for every operand. Set up by preprocess_constraints. */ extern struct operand_alternative recog_op_alt[MAX_RECOG_OPERANDS][MAX_RECOG_ALTERNATIVES]; /* Access the output function for CODE. */ #define OUT_FCN(CODE) (*insn_data[(int) (CODE)].outfun) /* A table defined in insn-output.c that give information about each insn-code value. */ typedef int (*insn_operand_predicate_fn) PROTO ((rtx, enum machine_mode)); typedef const char * (*insn_output_fn) PROTO ((rtx *, rtx)); #ifndef NO_MD_PROTOTYPES typedef rtx (*insn_gen_fn) PROTO ((rtx, ...)); #else typedef rtx (*insn_gen_fn) (); #endif struct insn_operand_data { insn_operand_predicate_fn predicate; const char *constraint; enum machine_mode mode; char strict_low; }; /* Legal values for insn_data.output_format. Indicate what type of data is stored in insn_data.output. */ #define INSN_OUTPUT_FORMAT_NONE 0 /* abort */ #define INSN_OUTPUT_FORMAT_SINGLE 1 /* const char * */ #define INSN_OUTPUT_FORMAT_MULTI 2 /* const char * const * */ #define INSN_OUTPUT_FORMAT_FUNCTION 3 /* const char * (*)(...) */ struct insn_data { const char *name; const PTR output; insn_gen_fn genfun; const struct insn_operand_data *operand; char n_operands; char n_dups; char n_alternatives; char output_format; }; extern const struct insn_data insn_data[];