quakeforge/tools/qfcc/include/statements.h

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/*
statement.h
Internal statements
Copyright (C) 2011 Bill Currie <bill@taniwha.org>
Author: Bill Currie <bill@taniwha.org>
Date: 2011/01/18
This program 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
of the License, or (at your option) any later version.
This program 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 this program; if not, write to:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
*/
#ifndef statement_h
#define statement_h
#include "QF/pr_comp.h"
typedef enum {
op_def,
op_value,
op_label,
op_temp,
op_alias,
} op_type_e;
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typedef struct {
struct def_s *def;
struct type_s *type;
struct flowvar_s *flowvar;
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struct daglabel_s *daglabel;
struct operand_s *alias;
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struct operand_s *alias_ops;
int users;
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} tempop_t;
typedef struct operand_s {
struct operand_s *next;
op_type_e op_type;
etype_t type; ///< possibly override def's type
int size; ///< for structures
union {
struct def_s *def;
struct ex_value_s *value;
struct ex_label_s *label;
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tempop_t tempop;
struct operand_s *alias;
} o;
} operand_t;
/** Overall type of statement.
Statement types are broken down into expressions (binary and unary,
includes address and pointer dereferencing (read)), assignment, pointer
assignment (write to dereference pointer), move (special case of pointer
assignment), state, function related (call, rcall, return and done), and
flow control (conditional branches, goto, jump (single pointer and jump
table)).
*/
typedef enum {
st_none, ///< not a (valid) statement. Used in dags.
st_expr, ///< c = a op b; or c = op a;
st_assign, ///< b = a
st_ptrassign, ///< *b = a; or *(b + c) = a;
st_move, ///< memcpy (c, a, b);
st_state, ///< state (a, b); or state (a, b, c)
st_func, ///< call, rcall or return/done
st_flow, ///< if/ifa/ifae/ifb/ifbe/ifnot or goto or jump/jumpb
} st_type_t;
typedef struct statement_s {
struct statement_s *next;
st_type_t type;
const char *opcode;
operand_t *opa;
operand_t *opb;
operand_t *opc;
struct expr_s *expr; ///< source expression for this statement
int number; ///< number of this statement in function
} statement_t;
typedef struct sblock_s {
struct sblock_s *next;
struct reloc_s *relocs;
struct ex_label_s *labels;
struct flownode_s *flownode;///< flow node for this block
int offset; ///< offset of first statement of block
int reachable;
int number; ///< number of this block in flow graph
statement_t *statements;
statement_t **tail;
} sblock_t;
struct expr_s;
struct type_s;
struct dstring_s;
const char *optype_str (op_type_e type);
operand_t *def_operand (struct def_s *def, struct type_s *type);
operand_t *value_operand (struct ex_value_s *value);
operand_t *temp_operand (struct type_s *type);
operand_t *alias_operand (etype_t type, operand_t *op);
void free_operand (operand_t *op);
sblock_t *new_sblock (void);
statement_t *new_statement (st_type_t type, const char *opcode,
struct expr_s *expr);
int statement_is_cond (statement_t *s);
int statement_is_goto (statement_t *s);
int statement_is_jumpb (statement_t *s);
int statement_is_call (statement_t *s);
int statement_is_return (statement_t *s);
sblock_t *statement_get_target (statement_t *s);
sblock_t **statement_get_targetlist (statement_t *s);
void sblock_add_statement (sblock_t *sblock, statement_t *statement);
sblock_t *make_statements (struct expr_s *expr);
void statements_count_temps (sblock_t *sblock);
void print_statement (statement_t *s);
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void dump_dot_sblock (void *data, const char *fname);
void dot_sblock (struct dstring_s *dstr, sblock_t *sblock, int blockno);
void print_sblock (sblock_t *sblock, const char *filename);
const char *operand_string (operand_t *op);
#endif//statement_h