4 * @author Sebastian Hack
6 * Backend node support.
8 * Copyright (C) 2005 Universitaet Karlsruhe
9 * Released under the GPL
15 #include "firm_config.h"
46 /** Expresses the direction of the stack pointer increment of IncSP nodes. */
48 be_stack_dir_along = 0,
49 be_stack_dir_against = 1
54 be_frame_flag_spill = 1,
55 be_frame_flag_local = 2,
60 * A "symbolic constant" for the size of the stack frame to use with IncSP nodes.
61 * It gets back-patched to the real size as soon it is known.
63 #define BE_STACK_FRAME_SIZE ((unsigned) -1)
65 void be_node_init(void);
67 const arch_irn_handler_t be_node_irn_handler;
69 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);
70 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);
71 ir_node *be_new_Copy(const arch_register_class_t *cls, ir_graph *irg, ir_node *block, ir_node *in);
72 ir_node *be_new_Perm(const arch_register_class_t *cls, ir_graph *irg, ir_node *bl, int arity, ir_node *in[]);
73 ir_node *be_new_Keep(const arch_register_class_t *cls, ir_graph *irg, ir_node *bl, int arity, ir_node *in[]);
75 ir_node *be_new_FrameLoad(const arch_register_class_t *cls_frame, const arch_register_class_t *cls_data,
76 ir_graph *irg, ir_node *bl, ir_node *mem, ir_node *frame, entity *ent);
77 ir_node *be_new_FrameStore(const arch_register_class_t *cls_frame, const arch_register_class_t *cls_data,
78 ir_graph *irg, ir_node *bl, ir_node *mem, ir_node *frame, ir_node *data, entity *ent);
79 ir_node *be_new_FrameAddr(const arch_register_class_t *cls_frame, ir_graph *irg, ir_node *bl, ir_node *frame, entity *ent);
81 ir_node *be_new_AddSP(const arch_register_t *sp, ir_graph *irg, ir_node *bl, ir_node *old_sp, ir_node *operand);
83 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);
86 * Make a stack pointer increase/decrease node.
87 * @param sp The stack pointer register.
88 * @param irg The graph to insert the node to.
89 * @param bl The block to insert the node into.
90 * @param old_sp The node defining the former stack pointer.
91 * @param amount The mount of bytes the stack pointer shall be increased/decreased.
92 * @param dir The direction in which the stack pointer shall be modified:
93 * Along the stack's growing direction or against.
94 * @return A new stack pointer increment/decrement node.
95 * @note This node sets a register constraint to the @p sp register on its output.
97 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);
99 void be_set_IncSP_offset(ir_node *irn, unsigned offset);
100 unsigned be_get_IncSP_offset(ir_node *irn);
102 void be_set_IncSP_direction(ir_node *irn, be_stack_dir_t dir);
103 be_stack_dir_t be_get_IncSP_direction(ir_node *irn);
105 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[]);
106 ir_node *be_new_Return(ir_graph *irg, ir_node *bl, int n, ir_node *in[]);
107 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);
108 ir_node *be_new_RegParams(ir_graph *irg, ir_node *bl, int n_out);
110 ir_node *be_spill(const arch_env_t *arch_env, ir_node *irn,ir_node *spill_ctx);
111 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);
114 * Get the backend opcode of a backend node.
115 * @param irn The node.
116 * @return The backend opcode.
118 be_opcode_t be_get_irn_opcode(const ir_node *irn);
120 int be_is_Spill(const ir_node *irn);
121 int be_is_Reload(const ir_node *irn);
122 int be_is_Copy(const ir_node *irn);
123 int be_is_Perm(const ir_node *irn);
124 int be_is_Keep(const ir_node *irn);
125 int be_is_Call(const ir_node *irn);
126 int be_is_IncSP(const ir_node *irn);
127 int be_is_AddSP(const ir_node *irn);
128 int be_is_RegParams(const ir_node *irn);
129 int be_is_StackParam(const ir_node *irn);
132 * Get the entity on the stack frame the given node uses.
133 * @param irn The node.
134 * @return The entity on the stack frame used by the node or NULL,
135 * if the node does not access the stack frame or is no back-end node.
138 entity *be_get_frame_entity(const ir_node *irn);
140 void be_set_Spill_entity(ir_node *irn, entity *ent);
141 entity *be_get_spill_entity(const ir_node *irn);
143 ir_node *be_get_Spill_context(const ir_node *irn);
146 * Impose a register constraint on a backend node.
147 * @param irn The node.
148 * @param pos The position of the argument/result. Results range from -1..-m and arguments form 0..n
149 * @param reg The register which is admissible for that node, argument/result and position.
151 void be_set_constr_single_reg(ir_node *irn, int pos, const arch_register_t *reg);
154 * Impose register constraints on a backend node.
155 * The register subsets given by the limited function in @p req are copied to the backend node.
156 * This requires that the constraint type of the @p req is arch_register_req_type_limited.
157 * @param irn The backend node.
158 * @param pos The position (@see be_set_constr_single_reg()).
159 * @param req The register requirements which shall be transferred.
161 void be_set_constr_limited(ir_node *irn, int pos, const arch_register_req_t *req);
164 * Set the flags of a node.
165 * @param irn The node itself.
166 * @param pos The position (0..n) for arguments, (-1..-m) for results.
167 * @param flags The flags to set for that node and position.
169 void be_node_set_flags(ir_node *irn, int pos, arch_irn_flags_t flags);
172 * Set the register class of a node.
173 * @param irn The node itself.
174 * @param pos The position (0..n) for arguments, (-1..-m) for results.
175 * @param flags The register class to set for that node and position.
177 void be_node_set_reg_class(ir_node *irn, int pos, const arch_register_class_t *cls);
180 * Insert a Perm node after a specific node in the schedule.
181 * The Perm permutes over all values live at the given node.
182 * This means that all liveness intervals are cut apart at this
183 * location in the program.
185 ir_node *insert_Perm_after(const arch_env_t *env,
186 const arch_register_class_t *cls,
187 dom_front_info_t *dom_front,
191 #endif /* _BENODE_T_H */