/* Declarations for rtx-reader support for gen* routines.
- Copyright (C) 2000, 2002 Free Software Foundation, Inc.
+ Copyright (C) 2000-2020 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/>. */
+
+#ifndef GCC_GENSUPPORT_H
+#define GCC_GENSUPPORT_H
+
+#include "read-md.h"
struct obstack;
extern struct obstack *rtl_obstack;
-extern int init_md_reader_args PARAMS ((int, char **));
-extern int init_md_reader PARAMS ((const char *));
-extern rtx read_md_rtx PARAMS ((int *, int *));
+/* Information about an .md define_* rtx. */
+class md_rtx_info {
+public:
+ /* The rtx itself. */
+ rtx def;
+
+ /* The location of the first line of the rtx. */
+ file_location loc;
+
+ /* The unique number attached to the rtx. Currently all define_insns,
+ define_expands, define_splits, define_peepholes and define_peephole2s
+ share the same insn_code index space. */
+ int index;
+};
+
+#define OPTAB_CL(name, pat, c, b, l) name,
+#define OPTAB_CX(name, pat)
+#define OPTAB_CD(name, pat) name,
+#define OPTAB_NL(name, pat, c, b, s, l) name,
+#define OPTAB_NC(name, pat, c) name,
+#define OPTAB_NX(name, pat)
+#define OPTAB_VL(name, pat, c, b, s, l) name,
+#define OPTAB_VC(name, pat, c) name,
+#define OPTAB_VX(name, pat)
+#define OPTAB_DC(name, pat, c) name,
+#define OPTAB_D(name, pat) name,
+
+/* Enumerates all optabs. */
+typedef enum optab_tag {
+ unknown_optab,
+#include "optabs.def"
+ NUM_OPTABS
+} optab;
+
+#undef OPTAB_CL
+#undef OPTAB_CX
+#undef OPTAB_CD
+#undef OPTAB_NL
+#undef OPTAB_NC
+#undef OPTAB_NX
+#undef OPTAB_VL
+#undef OPTAB_VC
+#undef OPTAB_VX
+#undef OPTAB_DC
+#undef OPTAB_D
+
+/* Describes one entry in optabs.def. */
+struct optab_def
+{
+ /* The name of the optab (e.g. "add_optab"). */
+ const char *name;
+
+ /* The pattern that matching define_expands and define_insns have.
+ See the comment at the head of optabs.def for details. */
+ const char *pattern;
+
+ /* The initializers (in the form of C code) for the libcall_basename,
+ libcall_suffix and libcall_gen fields of (convert_)optab_libcall_d. */
+ const char *base;
+ const char *suffix;
+ const char *libcall;
+
+ /* The optab's enum value. */
+ unsigned int op;
+
+ /* The value returned by optab_to_code (OP). */
+ enum rtx_code fcode;
+
+ /* CODE if code_to_optab (CODE) should return OP, otherwise UNKNOWN. */
+ enum rtx_code rcode;
+
+ /* 1: conversion optabs with libcall data,
+ 2: conversion optabs without libcall data,
+ 3: non-conversion optabs with libcall data ("normal" and "overflow"
+ optabs in the optabs.def comment)
+ 4: non-conversion optabs without libcall data ("direct" optabs). */
+ unsigned int kind;
+};
+
+extern optab_def optabs[];
+extern unsigned int num_optabs;
+
+/* Information about an instruction name that matches an optab pattern. */
+struct optab_pattern
+{
+ /* The name of the instruction. */
+ const char *name;
+
+ /* The matching optab. */
+ unsigned int op;
+
+ /* The optab modes. M2 is only significant for conversion optabs;
+ it is zero otherwise. */
+ unsigned int m1, m2;
+
+ /* An index that provides a lexicographical sort of (OP, M2, M1).
+ Used by genopinit.c. */
+ unsigned int sort_num;
+};
+
+extern rtx add_implicit_parallel (rtvec);
+extern rtx_reader *init_rtx_reader_args_cb (int, const char **,
+ bool (*)(const char *));
+extern rtx_reader *init_rtx_reader_args (int, const char **);
+extern bool read_md_rtx (md_rtx_info *);
+extern unsigned int get_num_insn_codes ();
+
+/* Set this to 0 to disable automatic elision of insn patterns which
+ can never be used in this configuration. See genconditions.c.
+ Must be set before calling init_md_reader. */
+extern int insn_elision;
+
+/* Return the C test that says whether a definition rtx can be used,
+ or "" if it can be used unconditionally. */
+extern const char *get_c_test (rtx);
+
+/* If the C test passed as the argument can be evaluated at compile
+ time, return its truth value; else return -1. The test must have
+ appeared somewhere in the machine description when genconditions
+ was run. */
+extern int maybe_eval_c_test (const char *);
+
+/* Add an entry to the table of conditions. Used by genconditions and
+ by read-rtl.c. */
+extern void add_c_test (const char *, int);
+
+/* This structure is used internally by gensupport.c and genconditions.c. */
+struct c_test
+{
+ const char *expr;
+ int value;
+};
+
+#ifdef __HASHTAB_H__
+extern hashval_t hash_c_test (const void *);
+extern int cmp_c_test (const void *, const void *);
+extern void traverse_c_tests (htab_trav, void *);
+#endif
+
+/* Predicate handling: helper functions and data structures. */
+
+struct pred_data
+{
+ struct pred_data *next; /* for iterating over the set of all preds */
+ const char *name; /* predicate name */
+ bool special; /* special handling of modes? */
+
+ /* data used primarily by genpreds.c */
+ const char *c_block; /* C test block */
+ rtx exp; /* RTL test expression */
+
+ /* data used primarily by genrecog.c */
+ enum rtx_code singleton; /* if pred takes only one code, that code */
+ int num_codes; /* number of codes accepted */
+ bool allows_non_lvalue; /* if pred allows non-lvalue expressions */
+ bool allows_non_const; /* if pred allows non-const expressions */
+ bool codes[NUM_RTX_CODE]; /* set of codes accepted */
+};
+
+extern struct pred_data *first_predicate;
+extern struct pred_data *lookup_predicate (const char *);
+extern void add_predicate_code (struct pred_data *, enum rtx_code);
+extern void add_predicate (struct pred_data *);
+
+#define FOR_ALL_PREDICATES(p) for (p = first_predicate; p; p = p->next)
+
+struct pattern_stats
+{
+ /* The largest match_operand, match_operator or match_parallel
+ number found. */
+ int max_opno;
+
+ /* The largest match_dup, match_op_dup or match_par_dup number found. */
+ int max_dup_opno;
+
+ /* The smallest and largest match_scratch number found. */
+ int min_scratch_opno;
+ int max_scratch_opno;
+
+ /* The number of times match_dup, match_op_dup or match_par_dup appears
+ in the pattern. */
+ int num_dups;
+
+ /* The number of rtx arguments to the generator function. */
+ int num_generator_args;
+
+ /* The number of rtx operands in an insn. */
+ int num_insn_operands;
-extern void message_with_line PARAMS ((int, const char *, ...))
- ATTRIBUTE_PRINTF_2;
+ /* The number of operand variables that are needed. */
+ int num_operand_vars;
+};
-extern int n_comma_elts PARAMS ((const char *));
-extern const char *scan_comma_elt PARAMS ((const char **));
+extern void get_pattern_stats (struct pattern_stats *ranges, rtvec vec);
+extern void compute_test_codes (rtx, file_location, char *);
+extern file_location get_file_location (rtx);
+extern const char *get_emit_function (rtx);
+extern bool needs_barrier_p (rtx);
+extern bool find_optab (optab_pattern *, const char *);
+#endif /* GCC_GENSUPPORT_H */
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