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- /* Print RTL for GCC.
- Copyright (C) 1987-2019 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 3, or (at your option) any later
- version.
- GCC 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 GCC; see the file COPYING3. If not see
- <http://www.gnu.org/licenses/>. */
- #ifndef GCC_PRINT_RTL_H
- #define GCC_PRINT_RTL_H
- #ifndef GENERATOR_FILE
- #include "bitmap.h"
- #endif /* #ifndef GENERATOR_FILE */
- class rtx_reuse_manager;
- /* A class for writing rtx to a FILE *. */
- class rtx_writer
- {
- public:
- rtx_writer (FILE *outfile, int ind, bool simple, bool compact,
- rtx_reuse_manager *reuse_manager);
- void print_rtx (const_rtx in_rtx);
- void print_rtl (const_rtx rtx_first);
- int print_rtl_single_with_indent (const_rtx x, int ind);
- void finish_directive ();
- private:
- void print_rtx_operand_code_0 (const_rtx in_rtx, int idx);
- void print_rtx_operand_code_e (const_rtx in_rtx, int idx);
- void print_rtx_operand_codes_E_and_V (const_rtx in_rtx, int idx);
- void print_rtx_operand_code_i (const_rtx in_rtx, int idx);
- void print_rtx_operand_code_r (const_rtx in_rtx);
- void print_rtx_operand_code_u (const_rtx in_rtx, int idx);
- void print_rtx_operand (const_rtx in_rtx, int idx);
- bool operand_has_default_value_p (const_rtx in_rtx, int idx);
- private:
- FILE *m_outfile;
- int m_sawclose;
- int m_indent;
- bool m_in_call_function_usage;
- /* True means use simplified format without flags, modes, etc. */
- bool m_simple;
- /* If true, use compact dump format:
- - PREV/NEXT_INSN UIDs are omitted
- - INSN_CODEs are omitted,
- - register numbers are omitted for hard and virtual regs, and
- non-virtual pseudos are offset relative to the first such reg, and
- printed with a '%' sigil e.g. "%0" for (LAST_VIRTUAL_REGISTER + 1),
- - insn names are prefixed with "c" (e.g. "cinsn", "cnote", etc). */
- bool m_compact;
- /* An optional instance of rtx_reuse_manager. */
- rtx_reuse_manager *m_rtx_reuse_manager;
- };
- #ifdef BUFSIZ
- extern void print_rtl (FILE *, const_rtx);
- #endif
- extern void print_rtx_insn_vec (FILE *file, const vec<rtx_insn *> &vec);
- extern void dump_value_slim (FILE *, const_rtx, int);
- extern void dump_insn_slim (FILE *, const rtx_insn *);
- extern void dump_rtl_slim (FILE *, const rtx_insn *, const rtx_insn *,
- int, int);
- extern void print_value (pretty_printer *, const_rtx, int);
- extern void print_pattern (pretty_printer *, const_rtx, int);
- extern void print_insn (pretty_printer *pp, const rtx_insn *x, int verbose);
- extern void rtl_dump_bb_for_graph (pretty_printer *, basic_block);
- extern const char *str_pattern_slim (const_rtx);
- extern void print_rtx_function (FILE *file, function *fn, bool compact);
- #ifndef GENERATOR_FILE
- /* For some rtx codes (such as SCRATCH), instances are defined to only be
- equal for pointer equality: two distinct SCRATCH instances are non-equal.
- copy_rtx preserves this equality by reusing the SCRATCH instance.
- For example, in this x86 instruction:
- (cinsn (set (mem/v:BLK (scratch:DI) [0 A8])
- (unspec:BLK [
- (mem/v:BLK (scratch:DI) [0 A8])
- ] UNSPEC_MEMORY_BLOCKAGE)) "test.c":2
- (nil))
- the two instances of "(scratch:DI)" are actually the same underlying
- rtx pointer (and thus "equal"), and the insn will only be recognized
- (as "*memory_blockage") if this pointer-equality is preserved.
- To be able to preserve this pointer-equality when round-tripping
- through dumping/loading the rtl, we need some syntax. The first
- time a reused rtx is encountered in the dump, we prefix it with
- a reuse ID:
- (0|scratch:DI)
- Subsequent references to the rtx in the dump can be expressed using
- "reuse_rtx" e.g.:
- (reuse_rtx 0)
- This class is responsible for tracking a set of reuse IDs during a dump.
- Dumping with reuse-support is done in two passes:
- (a) a first pass in which "preprocess" is called on each top-level rtx
- to be seen in the dump. This traverses the rtx and its descendents,
- identifying rtx that will be seen more than once in the actual dump,
- and assigning them reuse IDs.
- (b) the actual dump, via print_rtx etc. print_rtx detect the presence
- of a live rtx_reuse_manager and uses it if there is one. Any rtx
- that were assigned reuse IDs will be printed with it the first time
- that they are seen, and then printed as "(reuse_rtx ID)" subsequently.
- The first phase is needed since otherwise there would be no way to tell
- if an rtx will be reused when first encountering it. */
- class rtx_reuse_manager
- {
- public:
- rtx_reuse_manager ();
- /* The first pass. */
- void preprocess (const_rtx x);
- /* The second pass (within print_rtx). */
- bool has_reuse_id (const_rtx x, int *out);
- bool seen_def_p (int reuse_id);
- void set_seen_def (int reuse_id);
- private:
- hash_map<const_rtx, int> m_rtx_occurrence_count;
- hash_map<const_rtx, int> m_rtx_reuse_ids;
- auto_bitmap m_defs_seen;
- int m_next_id;
- };
- #endif /* #ifndef GENERATOR_FILE */
- #endif // GCC_PRINT_RTL_H
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