/* * This file is part of libFirm. * Copyright (C) 2012 University of Karlsruhe. */ /** * @file * @brief Backend node support for generic backend nodes. * @author Sebastian Hack * @date 17.05.2005 * * Backend node support for generic backend nodes. * This file provides Perm, and Copy nodes. */ #ifndef FIRM_BE_BENODE_H #define FIRM_BE_BENODE_H #include "be_types.h" #include "firm_types.h" #include "irnode_t.h" typedef enum be_opcode { beo_Asm, beo_first = beo_Asm, beo_Copy, beo_CopyKeep, beo_IncSP, beo_Keep, beo_MemPerm, beo_Perm, beo_Relocation, beo_Start, beo_last = beo_Start } be_opcode; typedef struct be_node_attr_t { except_attr exc; } be_node_attr_t; typedef struct be_asm_attr_t { be_node_attr_t base; ident *text; void *operands; } be_asm_attr_t; extern ir_op *op_be_Asm; extern ir_op *op_be_Copy; extern ir_op *op_be_CopyKeep; extern ir_op *op_be_IncSP; extern ir_op *op_be_Keep; extern ir_op *op_be_MemPerm; extern ir_op *op_be_Perm; extern ir_op *op_be_Relocation; extern ir_op *op_be_Start; /** * Determines if irn is a be_node. */ bool is_be_node(const ir_node *irn); /** * Create all BE specific opcodes. */ void be_init_op(void); void be_finish_op(void); /** * Position numbers for the be_Copy inputs. */ enum { n_be_Copy_op = 0 }; /** * Make a new Copy node. */ ir_node *be_new_Copy(ir_node *block, ir_node *in); /** Returns the Copy Argument. */ ir_node *be_get_Copy_op(const ir_node *cpy); /** * Make a new Perm node. */ ir_node *be_new_Perm(arch_register_class_t const *cls, ir_node *block, int n, ir_node *const *in); /** * Create a new MemPerm node. * A MemPerm node exchanges the values of memory locations. (Typically entities * used as spillslots). MemPerm nodes perform this operation without modifying * any register values. */ ir_node *be_new_MemPerm(ir_node *block, int n, ir_node *const *in); ir_node *be_new_Keep(ir_node *block, int arity, ir_node *const *in); ir_node *be_new_Keep_one(ir_node *kept); /** * Make a stack pointer increase/decrease node. * @param sp The stack pointer register. * @param block The block to insert the node into. * @param old_sp The node defining the former stack pointer. * @param offset amount the stack should expand (positive offset) or shrink * (negative offset). Note that the offset is independent of the * natural stack direction of the architecture but just specifies * abstract expanding/shrinking of the stack area. * @param align force stack alignment to this power of 2. (i.e. specifying 4 * results in a 2**4 = 16 bytes stack alignment) * @return A new stack pointer increment/decrement node. * @note This node sets a register constraint to the @p sp register on * its output. */ ir_node *be_new_IncSP(const arch_register_t *sp, ir_node *block, ir_node *old_sp, int offset, unsigned align); /** Returns the previous node that computes the stack pointer. */ ir_node *be_get_IncSP_pred(ir_node *incsp); /** Sets the previous node that computes the stack pointer. */ void be_set_IncSP_pred(ir_node *incsp, ir_node *pred); /** * Sets a new offset to a IncSP node. * A positive offset means expanding the stack, a negative offset shrinking * an offset is == BE_STACK_FRAME_SIZE will be replaced by the real size of the * stackframe in the fix_stack_offsets phase. */ void be_set_IncSP_offset(ir_node *irn, int offset); /** Gets the offset from a IncSP node. */ int be_get_IncSP_offset(const ir_node *irn); /** Return requested stack alignment (as a logarithm of two, i.e. 4 means * the stack alignment will be 2**4=16 bytes) */ unsigned be_get_IncSP_align(const ir_node *irn); enum { n_be_CopyKeep_op, n_be_CopyKeep_max = n_be_CopyKeep_op }; ir_node *be_new_CopyKeep(ir_node *block, ir_node *src, int n, ir_node *const *in_keep); ir_node *be_get_CopyKeep_op(const ir_node *cpy); void be_set_MemPerm_in_entity(const ir_node *irn, unsigned n, ir_entity* ent); ir_entity *be_get_MemPerm_in_entity(const ir_node *irn, unsigned n); void be_set_MemPerm_out_entity(const ir_node *irn, unsigned n, ir_entity* ent); ir_entity *be_get_MemPerm_out_entity(const ir_node *irn, unsigned n); void be_set_MemPerm_offset(ir_node *irn, int offset); int be_get_MemPerm_offset(const ir_node *irn); unsigned be_get_MemPerm_entity_arity(const ir_node *irn); arch_register_req_t const **be_allocate_in_reqs(ir_graph *irg, unsigned n); const arch_register_req_t *be_create_reg_req(struct obstack *obst, const arch_register_t *reg, bool ignore); /** * Set the register requirements for a phi node. */ void be_set_phi_reg_req(ir_node *phi, const arch_register_req_t *req); /** * Creates a new phi with associated backend informations */ ir_node *be_new_Phi(ir_node *block, int n_ins, ir_node **ins, ir_mode *mode, const arch_register_req_t *req); /** * Create a new Phi with backend info and without inputs. * Inputs are added later with @see be_complete_Phi(). */ ir_node *be_new_Phi0(ir_node *block, ir_mode *mode, arch_register_req_t const *req); /** * Add inputs to a inputless Phi created by @see be_new_Phi0(). */ ir_node *be_complete_Phi(ir_node *phi, unsigned n_ins, ir_node **ins); ir_node *be_new_Asm(dbg_info *dbgi, ir_node *block, int n_ins, ir_node **ins, int n_outs, ident *text, void *operands); /** * Create a new Relocation node. The node returns the reference to an entity * with a specific linker relocation kind. The relocation kind is backend * specific. This node is meant to be used in preparation phases for position * independent code. */ ir_node *be_new_Relocation(ir_graph *irg, unsigned kind, ir_entity *entity); ir_entity *be_get_Relocation_entity(ir_node const* node); unsigned be_get_Relocation_kind(ir_node const* node); typedef enum be_start_out { BE_START_NO, BE_START_REG, BE_START_IGNORE, } be_start_out; ir_node *be_new_Start(ir_graph *irg, be_start_out const *outs); ir_node *be_get_Start_mem(ir_graph *irg); /** * Get Proj of start node with a specific register. */ ir_node *be_get_Start_proj(ir_graph *irg, arch_register_t const *reg); /** * Create a new Proj node. Its mode is determined from the out requirement * @p pos of @p pred. */ ir_node *be_new_Proj(ir_node *pred, unsigned pos); ir_node *be_new_Proj_reg(ir_node *pred, unsigned pos, arch_register_t const *reg); /** * Gets the Proj with number pn from irn. * Creates the Proj, if it does not exist, yet. */ ir_node *be_get_or_make_Proj_for_pn(ir_node *irn, unsigned pn); static inline bool be_is_Asm (const ir_node *irn) { return get_irn_op(irn) == op_be_Asm ; } static inline bool be_is_Copy (const ir_node *irn) { return get_irn_op(irn) == op_be_Copy ; } static inline bool be_is_CopyKeep (const ir_node *irn) { return get_irn_op(irn) == op_be_CopyKeep ; } static inline bool be_is_Perm (const ir_node *irn) { return get_irn_op(irn) == op_be_Perm ; } static inline bool be_is_MemPerm (const ir_node *irn) { return get_irn_op(irn) == op_be_MemPerm ; } static inline bool be_is_Keep (const ir_node *irn) { return get_irn_op(irn) == op_be_Keep ; } static inline bool be_is_IncSP (const ir_node *irn) { return get_irn_op(irn) == op_be_IncSP ; } static inline bool be_is_Relocation(const ir_node *irn) { return get_irn_op(irn) == op_be_Relocation; } static inline bool be_is_Start (const ir_node *irn) { return get_irn_op(irn) == op_be_Start ; } static inline be_asm_attr_t const *get_be_asm_attr_const(ir_node const *const asmn) { assert(be_is_Asm(asmn)); return (be_asm_attr_t const*)get_irn_generic_attr_const(asmn); } /** * Copies the backend specific attributes from old node to new node. */ void be_copy_attr(ir_graph *irg, ir_node const *old_node, ir_node *new_node); #endif