228 lines
6.8 KiB
C
228 lines
6.8 KiB
C
/* Declarations for rtx-reader support for gen* routines.
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Copyright (C) 2000-2019 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#ifndef GCC_GENSUPPORT_H
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#define GCC_GENSUPPORT_H
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#include "read-md.h"
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struct obstack;
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extern struct obstack *rtl_obstack;
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/* Information about an .md define_* rtx. */
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struct md_rtx_info {
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/* The rtx itself. */
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rtx def;
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/* The location of the first line of the rtx. */
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file_location loc;
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/* The unique number attached to the rtx. Currently all define_insns,
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define_expands, define_splits, define_peepholes and define_peephole2s
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share the same insn_code index space. */
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int index;
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};
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#define OPTAB_CL(name, pat, c, b, l) name,
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#define OPTAB_CX(name, pat)
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#define OPTAB_CD(name, pat) name,
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#define OPTAB_NL(name, pat, c, b, s, l) name,
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#define OPTAB_NC(name, pat, c) name,
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#define OPTAB_NX(name, pat)
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#define OPTAB_VL(name, pat, c, b, s, l) name,
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#define OPTAB_VC(name, pat, c) name,
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#define OPTAB_VX(name, pat)
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#define OPTAB_DC(name, pat, c) name,
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#define OPTAB_D(name, pat) name,
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/* Enumerates all optabs. */
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typedef enum optab_tag {
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unknown_optab,
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#include "optabs.def"
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NUM_OPTABS
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} optab;
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#undef OPTAB_CL
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#undef OPTAB_CX
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#undef OPTAB_CD
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#undef OPTAB_NL
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#undef OPTAB_NC
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#undef OPTAB_NX
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#undef OPTAB_VL
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#undef OPTAB_VC
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#undef OPTAB_VX
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#undef OPTAB_DC
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#undef OPTAB_D
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/* Describes one entry in optabs.def. */
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struct optab_def
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{
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/* The name of the optab (e.g. "add_optab"). */
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const char *name;
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/* The pattern that matching define_expands and define_insns have.
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See the comment at the head of optabs.def for details. */
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const char *pattern;
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/* The initializers (in the form of C code) for the libcall_basename,
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libcall_suffix and libcall_gen fields of (convert_)optab_libcall_d. */
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const char *base;
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const char *suffix;
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const char *libcall;
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/* The optab's enum value. */
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unsigned int op;
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/* The value returned by optab_to_code (OP). */
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enum rtx_code fcode;
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/* CODE if code_to_optab (CODE) should return OP, otherwise UNKNOWN. */
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enum rtx_code rcode;
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/* 1: conversion optabs with libcall data,
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2: conversion optabs without libcall data,
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3: non-conversion optabs with libcall data ("normal" and "overflow"
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optabs in the optabs.def comment)
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4: non-conversion optabs without libcall data ("direct" optabs). */
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unsigned int kind;
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};
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extern optab_def optabs[];
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extern unsigned int num_optabs;
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/* Information about an instruction name that matches an optab pattern. */
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struct optab_pattern
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{
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/* The name of the instruction. */
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const char *name;
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/* The matching optab. */
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unsigned int op;
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/* The optab modes. M2 is only significant for conversion optabs;
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it is zero otherwise. */
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unsigned int m1, m2;
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/* An index that provides a lexicographical sort of (OP, M2, M1).
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Used by genopinit.c. */
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unsigned int sort_num;
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};
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extern rtx add_implicit_parallel (rtvec);
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extern rtx_reader *init_rtx_reader_args_cb (int, const char **,
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bool (*)(const char *));
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extern rtx_reader *init_rtx_reader_args (int, const char **);
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extern bool read_md_rtx (md_rtx_info *);
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extern unsigned int get_num_insn_codes ();
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/* Set this to 0 to disable automatic elision of insn patterns which
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can never be used in this configuration. See genconditions.c.
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Must be set before calling init_md_reader. */
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extern int insn_elision;
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/* Return the C test that says whether a definition rtx can be used,
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or "" if it can be used unconditionally. */
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extern const char *get_c_test (rtx);
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/* If the C test passed as the argument can be evaluated at compile
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time, return its truth value; else return -1. The test must have
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appeared somewhere in the machine description when genconditions
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was run. */
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extern int maybe_eval_c_test (const char *);
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/* Add an entry to the table of conditions. Used by genconditions and
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by read-rtl.c. */
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extern void add_c_test (const char *, int);
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/* This structure is used internally by gensupport.c and genconditions.c. */
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struct c_test
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{
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const char *expr;
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int value;
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};
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#ifdef __HASHTAB_H__
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extern hashval_t hash_c_test (const void *);
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extern int cmp_c_test (const void *, const void *);
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extern void traverse_c_tests (htab_trav, void *);
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#endif
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/* Predicate handling: helper functions and data structures. */
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struct pred_data
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{
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struct pred_data *next; /* for iterating over the set of all preds */
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const char *name; /* predicate name */
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bool special; /* special handling of modes? */
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/* data used primarily by genpreds.c */
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const char *c_block; /* C test block */
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rtx exp; /* RTL test expression */
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/* data used primarily by genrecog.c */
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enum rtx_code singleton; /* if pred takes only one code, that code */
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int num_codes; /* number of codes accepted */
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bool allows_non_lvalue; /* if pred allows non-lvalue expressions */
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bool allows_non_const; /* if pred allows non-const expressions */
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bool codes[NUM_RTX_CODE]; /* set of codes accepted */
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};
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extern struct pred_data *first_predicate;
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extern struct pred_data *lookup_predicate (const char *);
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extern void add_predicate_code (struct pred_data *, enum rtx_code);
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extern void add_predicate (struct pred_data *);
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#define FOR_ALL_PREDICATES(p) for (p = first_predicate; p; p = p->next)
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struct pattern_stats
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{
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/* The largest match_operand, match_operator or match_parallel
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number found. */
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int max_opno;
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/* The largest match_dup, match_op_dup or match_par_dup number found. */
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int max_dup_opno;
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/* The smallest and largest match_scratch number found. */
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int min_scratch_opno;
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int max_scratch_opno;
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/* The number of times match_dup, match_op_dup or match_par_dup appears
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in the pattern. */
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int num_dups;
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/* The number of rtx arguments to the generator function. */
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int num_generator_args;
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/* The number of rtx operands in an insn. */
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int num_insn_operands;
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/* The number of operand variables that are needed. */
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int num_operand_vars;
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};
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extern void get_pattern_stats (struct pattern_stats *ranges, rtvec vec);
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extern void compute_test_codes (rtx, file_location, char *);
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extern file_location get_file_location (rtx);
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extern const char *get_emit_function (rtx);
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extern bool needs_barrier_p (rtx);
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extern bool find_optab (optab_pattern *, const char *);
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#endif /* GCC_GENSUPPORT_H */
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