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https://git.code.sf.net/p/quake/quakeforge
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3f3b501c58
With the need to handle aliasing in the optimizer, it has become apparent that having the flow data attached to symbols is not nearly as useful as having it attached to defs (which are views of the actual variables). This also involves a bit of a cleanup of operand types: op_pointer and op_alias are gone (this seems to greatly simplify the optimizer) There is a bit of a problem with enums in switch statements, but this might actually be a sign that something is not quite right in the switch code (other than enums not being recognized as ints for jump table optimization).
131 lines
3.7 KiB
C
131 lines
3.7 KiB
C
/*
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statement.h
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Internal statements
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Copyright (C) 2011 Bill Currie <bill@taniwha.org>
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Author: Bill Currie <bill@taniwha.org>
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Date: 2011/01/18
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License 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 this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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#ifndef statement_h
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#define statement_h
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#include "QF/pr_comp.h"
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typedef enum {
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op_def,
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op_value,
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op_label,
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op_temp,
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} op_type_e;
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typedef struct {
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struct def_s *def;
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struct type_s *type;
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struct flowvar_s *flowvar;
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struct daglabel_s *daglabel;
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struct operand_s *alias;
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int users;
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} tempop_t;
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typedef struct operand_s {
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struct operand_s *next;
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op_type_e op_type;
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etype_t type; ///< possibly override def's type
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int size; ///< for structures
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union {
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struct def_s *def;
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struct ex_value_s *value;
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struct ex_label_s *label;
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tempop_t tempop;
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} o;
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} operand_t;
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/** Overall type of statement.
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Statement types are broken down into expressions (binary and unary,
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includes address and pointer dereferencing (read)), assignment, pointer
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assignment (write to dereference pointer), move (special case of pointer
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assignment), state, function related (call, rcall, return and done), and
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flow control (conditional branches, goto, jump (single pointer and jump
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table)).
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*/
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typedef enum {
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st_none, ///< not a (valid) statement. Used in dags.
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st_expr, ///< c = a op b; or c = op a;
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st_assign, ///< b = a
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st_ptrassign, ///< *b = a; or *(b + c) = a;
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st_move, ///< memcpy (c, a, b);
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st_state, ///< state (a, b); or state (a, b, c)
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st_func, ///< call, rcall or return/done
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st_flow, ///< if/ifa/ifae/ifb/ifbe/ifnot or goto or jump/jumpb
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} st_type_t;
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typedef struct statement_s {
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struct statement_s *next;
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st_type_t type;
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const char *opcode;
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operand_t *opa;
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operand_t *opb;
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operand_t *opc;
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struct expr_s *expr; ///< source expression for this statement
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int number; ///< number of this statement in function
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} statement_t;
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typedef struct sblock_s {
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struct sblock_s *next;
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struct reloc_s *relocs;
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struct ex_label_s *labels;
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int offset; ///< offset of first statement of block
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int reachable;
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int number; ///< number of this block in flow graph
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statement_t *statements;
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statement_t **tail;
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} sblock_t;
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struct expr_s;
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struct type_s;
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const char *optype_str (op_type_e type);
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operand_t *temp_operand (struct type_s *type);
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sblock_t *new_sblock (void);
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statement_t *new_statement (st_type_t type, const char *opcode,
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struct expr_s *expr);
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int statement_is_cond (statement_t *s);
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int statement_is_goto (statement_t *s);
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int statement_is_jumpb (statement_t *s);
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int statement_is_call (statement_t *s);
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int statement_is_return (statement_t *s);
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sblock_t *statement_get_target (statement_t *s);
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sblock_t **statement_get_targetlist (statement_t *s);
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void sblock_add_statement (sblock_t *sblock, statement_t *statement);
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sblock_t *make_statements (struct expr_s *expr);
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void statements_count_temps (sblock_t *sblock);
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void print_statement (statement_t *s);
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void dump_dot_sblock (void *data, const char *fname);
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void print_sblock (sblock_t *sblock, const char *filename);
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const char *operand_string (operand_t *op);
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#endif//statement_h
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