4 * @author Sebastian Hack
6 * Backend node support.
8 * Copyright (C) 2005 Universitaet Karlsruhe
9 * Released under the GPL
15 #include "firm_config.h"
26 * The benode op's. Must be available to register emitter function.
28 extern ir_op *op_be_Spill;
29 extern ir_op *op_be_Reload;
30 extern ir_op *op_be_Perm;
31 extern ir_op *op_be_Copy;
32 extern ir_op *op_be_Keep;
33 extern ir_op *op_be_Call;
34 extern ir_op *op_be_Return;
35 extern ir_op *op_be_IncSP;
36 extern ir_op *op_be_Alloca;
37 extern ir_op *op_be_SetSP;
38 extern ir_op *op_be_RegParams;
39 extern ir_op *op_be_StackParam;
40 extern ir_op *op_be_FrameAddr;
41 extern ir_op *op_be_FrameLoad;
42 extern ir_op *op_be_FrameStore;
65 /** Expresses the direction of the stack pointer increment of IncSP nodes. */
67 be_stack_dir_along = 0,
68 be_stack_dir_against = 1
73 be_frame_flag_spill = 1,
74 be_frame_flag_local = 2,
79 * A "symbolic constant" for the size of the stack frame to use with IncSP nodes.
80 * It gets back-patched to the real size as soon it is known.
82 #define BE_STACK_FRAME_SIZE ((unsigned) -1)
84 void be_node_init(void);
86 const arch_irn_handler_t be_node_irn_handler;
88 ir_node *be_new_Spill(const arch_register_class_t *cls, const arch_register_class_t *cls_frame, ir_graph *irg, ir_node *bl, ir_node *frame, ir_node *node_to_spill, ir_node *ctx);
89 ir_node *be_new_Reload(const arch_register_class_t *cls, const arch_register_class_t *cls_frame, ir_graph *irg, ir_node *bl, ir_node *frame, ir_node *spill_node, ir_mode *mode);
90 ir_node *be_new_Copy(const arch_register_class_t *cls, ir_graph *irg, ir_node *block, ir_node *in);
91 ir_node *be_new_Perm(const arch_register_class_t *cls, ir_graph *irg, ir_node *bl, int arity, ir_node *in[]);
92 ir_node *be_new_Keep(const arch_register_class_t *cls, ir_graph *irg, ir_node *bl, int arity, ir_node *in[]);
94 ir_node *be_new_FrameLoad(const arch_register_class_t *cls_frame, const arch_register_class_t *cls_data,
95 ir_graph *irg, ir_node *bl, ir_node *mem, ir_node *frame, entity *ent);
96 ir_node *be_new_FrameStore(const arch_register_class_t *cls_frame, const arch_register_class_t *cls_data,
97 ir_graph *irg, ir_node *bl, ir_node *mem, ir_node *frame, ir_node *data, entity *ent);
98 ir_node *be_new_FrameAddr(const arch_register_class_t *cls_frame, ir_graph *irg, ir_node *bl, ir_node *frame, entity *ent);
100 ir_node *be_new_Alloca(const arch_register_t *sp, ir_graph *irg, ir_node *bl, ir_node *mem, ir_node *old_sp, ir_node *sz);
102 ir_node *be_new_SetSP(const arch_register_t *sp, ir_graph *irg, ir_node *bl, ir_node *old_sp, ir_node *operand, ir_node *mem);
105 * Make a stack pointer increase/decrease node.
106 * @param sp The stack pointer register.
107 * @param irg The graph to insert the node to.
108 * @param bl The block to insert the node into.
109 * @param old_sp The node defining the former stack pointer.
110 * @param amount The mount of bytes the stack pointer shall be increased/decreased.
111 * @param dir The direction in which the stack pointer shall be modified:
112 * Along the stack's growing direction or against.
113 * @return A new stack pointer increment/decrement node.
114 * @note This node sets a register constraint to the @p sp register on its output.
116 ir_node *be_new_IncSP(const arch_register_t *sp, ir_graph *irg, ir_node *bl, ir_node *old_sp, ir_node *mem, unsigned amount, be_stack_dir_t dir);
118 void be_set_IncSP_offset(ir_node *irn, unsigned offset);
119 unsigned be_get_IncSP_offset(const ir_node *irn);
121 void be_set_IncSP_direction(ir_node *irn, be_stack_dir_t dir);
122 be_stack_dir_t be_get_IncSP_direction(const ir_node *irn);
124 entity *be_Call_get_entity(const ir_node *call);
125 void be_Call_set_entity(ir_node *call, entity *ent);
127 ir_node *be_new_Call(ir_graph *irg, ir_node *bl, ir_node *mem, ir_node *sp, ir_node *ptr, int n_outs, int n, ir_node *in[]);
128 ir_node *be_new_Return(ir_graph *irg, ir_node *bl, int n, ir_node *in[]);
129 ir_node *be_new_StackParam(const arch_register_class_t *cls, const arch_register_class_t *cls_frame, ir_graph *irg, ir_node *bl, ir_mode *mode, ir_node *frame_pointer, entity *ent);
130 ir_node *be_new_RegParams(ir_graph *irg, ir_node *bl, int n_out);
132 ir_node *be_spill(const arch_env_t *arch_env, ir_node *irn,ir_node *spill_ctx);
133 ir_node *be_reload(const arch_env_t *arch_env, const arch_register_class_t *cls, ir_node *reloader, ir_mode *mode, ir_node *spill);
136 * Get the backend opcode of a backend node.
137 * @param irn The node.
138 * @return The backend opcode.
140 be_opcode_t be_get_irn_opcode(const ir_node *irn);
142 int be_is_Spill(const ir_node *irn);
143 int be_is_Reload(const ir_node *irn);
144 int be_is_Copy(const ir_node *irn);
145 int be_is_Perm(const ir_node *irn);
146 int be_is_Keep(const ir_node *irn);
147 int be_is_Call(const ir_node *irn);
148 int be_is_IncSP(const ir_node *irn);
149 int be_is_AddSP(const ir_node *irn);
150 int be_is_RegParams(const ir_node *irn);
151 int be_is_StackParam(const ir_node *irn);
152 int be_is_FrameAddr(const ir_node *irn);
153 int be_is_FrameLoad(const ir_node *irn);
154 int be_is_FrameStore(const ir_node *irn);
157 * Get the entity on the stack frame the given node uses.
158 * @param irn The node.
159 * @return The entity on the stack frame used by the node or NULL,
160 * if the node does not access the stack frame or is no back-end node.
163 entity *be_get_frame_entity(const ir_node *irn);
165 void be_set_Spill_entity(ir_node *irn, entity *ent);
166 entity *be_get_spill_entity(const ir_node *irn);
168 ir_node *be_get_Spill_context(const ir_node *irn);
171 * Set the entities of a Reload to the ones of the Spill it is pointing to.
172 * @param irg The graph.
174 void be_copy_entities_to_reloads(ir_graph *irg);
177 * Impose a register constraint on a backend node.
178 * @param irn The node.
179 * @param pos The position of the argument/result. Results range from -1..-m and arguments form 0..n
180 * @param reg The register which is admissible for that node, argument/result and position.
182 void be_set_constr_single_reg(ir_node *irn, int pos, const arch_register_t *reg);
185 * Impose register constraints on a backend node.
186 * The register subsets given by the limited function in @p req are copied to the backend node.
187 * This requires that the constraint type of the @p req is arch_register_req_type_limited.
188 * @param irn The backend node.
189 * @param pos The position (@see be_set_constr_single_reg()).
190 * @param req The register requirements which shall be transferred.
192 void be_set_constr_limited(ir_node *irn, int pos, const arch_register_req_t *req);
195 * Set the flags of a node.
196 * @param irn The node itself.
197 * @param pos The position (0..n) for arguments, (-1..-m) for results.
198 * @param flags The flags to set for that node and position.
200 void be_node_set_flags(ir_node *irn, int pos, arch_irn_flags_t flags);
203 * Set the register class of a node.
204 * @param irn The node itself.
205 * @param pos The position (0..n) for arguments, (-1..-m) for results.
206 * @param flags The register class to set for that node and position.
208 void be_node_set_reg_class(ir_node *irn, int pos, const arch_register_class_t *cls);
211 * Insert a Perm node after a specific node in the schedule.
212 * The Perm permutes over all values live at the given node.
213 * This means that all liveness intervals are cut apart at this
214 * location in the program.
216 ir_node *insert_Perm_after(const arch_env_t *env,
217 const arch_register_class_t *cls,
218 dom_front_info_t *dom_front,
222 #endif /* _BENODE_T_H */