3 * File name: ir/ir/irop_t.h
4 * Purpose: Representation of opcode of intermediate operation -- private header.
5 * Author: Christian Schaefer
6 * Modified by: Goetz Lindenmaier
9 * Copyright: (c) 1998-2003 Universität Karlsruhe
10 * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
21 /** The allowed parities */
24 oparity_unary, /**< an unary operator -- considering 'numeric' arguments. */
25 oparity_binary, /**< an binary operator -- considering 'numeric' arguments.*/
26 oparity_trinary, /**< an trinary operator -- considering 'numeric' arguments.*/
27 oparity_zero, /**< no operators, as e.g. Const. */
28 oparity_variable, /**< arity not fixed by opcode, but statically
29 known. E.g., number of arguments to call. */
30 oparity_dynamic, /**< arity depends on state of firm representation.
31 Can change by optimizations...
32 We must allocate a dynamic in array for the node! */
33 oparity_any, /**< other arity */
39 irop_flag_labeled = 0x00000001, /**< if set, Output edge labels on in-edges in vcg graph */
40 irop_flag_commutative = 0x00000002, /**< operation is commutative */
41 irop_flag_cfopcode = 0x00000004, /**< is a control flow operation */
42 irop_flag_ip_cfopcode = 0x00000008, /**< operation manipulates interprocedural control flow */
43 irop_flag_fragile = 0x00000010, /**< set if the operation can change the control flow because
45 irop_flag_forking = 0x00000020, /**< the operation is a forking control flow */
50 * The compute value operation.
51 * This operation evaluates an IR node into a tarval if possible,
52 * returning tarval_bad otherwise.
54 typedef tarval *(*computed_value_func)(ir_node *n);
57 * The equivalent node operation.
58 * This operation returns an equivalent node for the input node.
59 * It does not create new nodes. It is therefore safe to free n
60 * if the node returned is not n.
61 * If a node returns a Tuple we can not just skip it. If the size of the
62 * in array fits, we transform n into a tuple (e.g., possible for Div).
64 typedef ir_node *(*equivalent_node_func)(ir_node *n);
67 * The transform node operation.
68 * This operation tries several [inplace] [optimizing] transformations
69 * and returns an equivalent node.
70 * The difference to equivalent_node() is that these
71 * transformations _do_ generate new nodes, and thus the old node must
72 * not be freed even if the equivalent node isn't the old one.
74 typedef ir_node *(*transform_node_func)(ir_node *n);
77 * The node attribute compare operation.
78 * Compares the nodes attributes of two nodes of identical opcode
79 * and returns 0 if the attributes are identical, 1 if they differ.
81 typedef int (*node_cmp_attr_func)(ir_node *a, ir_node *b);
84 * The reassociation operation.
85 * Called from a walker. Returns non-zero if
86 * a reassociation rule was applied.
87 * The pointer n is set to the newly created node, if some reassociation
90 typedef int (*reassociate_func)(ir_node **n);
93 * The copy attribute operation.
94 * Copy the node attributes from a 'old' node to a 'new' one.
96 typedef void (*copy_attr_func)(const ir_node *old_node, ir_node *new_node);
98 /** The type of an ir_op. */
100 opcode code; /**< the unique opcode of the op */
101 ident *name; /**< the name of the op */
102 size_t attr_size; /**< Space needed in memory for private attributes */
103 op_pin_state op_pin_state_pinned; /**< How to deal with the node in cse, pre. */
104 op_arity opar; /**< arity of operator. */
105 int op_index; /**< the index of the first data operand, 0 for most cases, 1 for Div etc. */
106 unsigned flags; /**< flags describing the behavior of the ir_op, a bitmaks of irop_flags */
109 computed_value_func computed_value; /**< evaluates a node into a tarval if possible. */
110 equivalent_node_func equivalent_node; /**< optimizes the node by returning an equivalent one. */
111 transform_node_func transform_node; /**< optimizes the node by transforming it. */
112 node_cmp_attr_func node_cmp_attr; /**< compares two node attributes. */
113 reassociate_func reassociate; /**< reassociate a tree */
114 copy_attr_func copy_attr; /**< copy node attributes */
118 * Creates a new ir operation.
120 * @param code the opcode, one of type \c opcode
121 * @param name the printable name of this opcode
122 * @param p wheater operations of this opcode are op_pin_state_pinned or floating
123 * @param flags a bitmask of irop_flags describing the behavior of the ir operation
124 * @param opar the parity of this ir operation
125 * @param op_index if the parity is oparity_unary, oparity_binary or oparity_trinary the index
126 * of the left operand
127 * @param attr_size attribute size for this ir operation
129 * @return The genenerated ir operation.
131 ir_op * new_ir_op(opcode code, const char *name, op_pin_state p,
132 unsigned flags, op_arity opar, int op_index, size_t attr_size);
135 * Frees a newly created ir operation.
137 void free_ir_op(ir_op *code);
139 /** Initialize the irop module. */
142 /** Free memory used by irop module. */
143 void finish_op(void);
146 * Copies simply all attributes stored in the old node to the new node.
147 * Assumes both have the same opcode and sufficient size.
149 void default_copy_attr(const ir_node *old_node, ir_node *new_node);
151 /** Returns the attribute size of nodes of this opcode.
152 @note Use not encouraged, internal feature. */
153 static INLINE int get_op_attr_size (const ir_op *op) {
154 return op->attr_size;
157 /** Returns non-zero if op is one of Start, End, Jmp, Cond, Return, Raise or Bad. */
158 static INLINE int is_cfopcode(const ir_op *op) {
159 return op->flags & irop_flag_cfopcode;
162 /** Returns true if the operation manipulates interprocedural control flow:
163 CallBegin, EndReg, EndExcept */
164 static INLINE int is_ip_cfopcode(const ir_op *op) {
165 return op->flags & irop_flag_ip_cfopcode;
168 /* Returns non-zero if operation is commutative */
169 static INLINE int is_op_commutative(const ir_op *op) {
170 return op->flags & irop_flag_commutative;
173 /* Returns non-zero if operation is fragile */
174 static INLINE int is_op_fragile(const ir_op *op) {
175 return op->flags & irop_flag_fragile;
178 /* Returns non-zero if operation is forking control flow */
179 static INLINE int is_op_forking(const ir_op *op) {
180 return op->flags & irop_flag_forking;
183 static INLINE opcode __get_op_code(const ir_op *op) {
187 static INLINE ident *__get_op_ident(const ir_op *op){
191 static INLINE op_pin_state __get_op_pinned(const ir_op *op) {
192 return op->op_pin_state_pinned;
196 #define get_op_code(op) __get_op_code(op)
197 #define get_op_ident(op) __get_op_ident(op)
198 #define get_op_pinned(op) __get_op_pinned(op)
201 #endif /* _IROP_T_H_ */