X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fbearch.h;h=462ab089843d115adccaf7072440572d8d956e62;hb=9815fbf8d1bcc62558574a4ac0ef7a2849cd2e00;hp=48b247b9e14d0436e65365ccbf40872edb9d24d2;hpb=c29950589fd872e87fc148e2cd1d85173ecaef78;p=libfirm diff --git a/ir/be/bearch.h b/ir/be/bearch.h index 48b247b9e..462ab0898 100644 --- a/ir/be/bearch.h +++ b/ir/be/bearch.h @@ -1,5 +1,5 @@ /* - * Copyright (C) 1995-2007 University of Karlsruhe. All right reserved. + * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved. * * This file is part of libFirm. * @@ -26,242 +26,200 @@ #ifndef FIRM_BE_BEARCH_H #define FIRM_BE_BEARCH_H +#include + #include "firm_types.h" #include "bitset.h" +#include "obst.h" +#include "raw_bitset.h" +#include "irop_t.h" + +#include "be_types.h" +#include "beinfo.h" #include "be.h" +#include "beirg.h" +#include "error.h" -typedef struct arch_register_class_t arch_register_class_t; -typedef struct arch_register_req_t arch_register_req_t; -typedef struct arch_register_t arch_register_t; -typedef struct arch_flag_t arch_flag_t; -typedef struct arch_inverse_t arch_inverse_t; -typedef struct arch_isa_if_t arch_isa_if_t; -typedef struct arch_isa_t arch_isa_t; -typedef struct arch_env_t arch_env_t; -typedef struct arch_irn_ops_if_t arch_irn_ops_if_t; -typedef struct arch_irn_ops_t arch_irn_ops_t; -typedef struct arch_irn_handler_t arch_irn_handler_t; -typedef struct arch_code_generator_t arch_code_generator_t; -typedef struct arch_code_generator_if_t arch_code_generator_if_t; +typedef enum arch_register_class_flags_t { + arch_register_class_flag_none = 0, + /** don't do automatic register allocation for this class */ + arch_register_class_flag_manual_ra = 1U << 0, + /** the register models an abstract state (example: fpu rounding mode) */ + arch_register_class_flag_state = 1U << 1 +} arch_register_class_flags_t; typedef enum arch_register_type_t { - arch_register_type_none = 0, - arch_register_type_caller_save = 1, /**< The register must be saved by the caller - upon a function call. It thus can be overwritten - in the called function. */ - arch_register_type_callee_save = 2, /**< The register must be saved by the caller - upon a function call. It thus can be overwritten - in the called function. */ - arch_register_type_ignore = 4, /**< Do not consider this register when allocating. */ - arch_register_type_joker = 8, /**< The emitter can choose an arbitrary register */ - arch_register_type_virtual = 16, /**< This is just a virtual register */ - arch_register_type_state = 32, + arch_register_type_none = 0, + /** The register must be saved by the caller upon a function call. It thus + * can be overwritten in the called function. */ + arch_register_type_caller_save = 1U << 0, + /** The register must be saved by the caller upon a function call. It thus + * can be overwritten in the called function. */ + arch_register_type_callee_save = 1U << 1, + /** Do not consider this register when allocating. */ + arch_register_type_ignore = 1U << 2, + /** The emitter can choose an arbitrary register. The register fulfills any + * register constraints as long as the register class matches */ + arch_register_type_joker = 1U << 3, + /** This is just a virtual register. Virtual registers fulfill any register + * constraints as long as the register class matches. It is a allowed to + * have multiple definitions for the same virtual register at a point */ + arch_register_type_virtual = 1U << 4, + /** The register represents a state that should be handled by bestate + * code */ + arch_register_type_state = 1U << 5, } arch_register_type_t; -/** - * Put all registers in a class into a bitset. - * @param cls The class. - * @param bs The bitset. May be NULL. - * @return The number of registers in the class. - */ -extern int arch_register_class_put(const arch_register_class_t *cls, bitset_t *bs); - -typedef enum arch_operand_type_t { - arch_operand_type_invalid, - arch_operand_type_memory, - arch_operand_type_register, - arch_operand_type_immediate, - arch_operand_type_symconst, - arch_operand_type_last -} arch_operand_type_t; - /** * Different types of register allocation requirements. */ typedef enum arch_register_req_type_t { - arch_register_req_type_none = 0, /**< No register requirement. */ - arch_register_req_type_normal = 1, /**< All registers in the class are allowed. */ - arch_register_req_type_limited = 2, /**< Only a real subset of the class is allowed. */ - arch_register_req_type_should_be_same = 4, /**< The register should be equal another one at the node. */ - arch_register_req_type_should_be_different = 8, /**< The register must be unequal to some other at the node. */ - arch_register_req_type_should_be_different_from_all = 16, /**< The register must be different from all in's at the node */ + /** No register requirement. */ + arch_register_req_type_none = 0, + /** All registers in the class are allowed. */ + arch_register_req_type_normal = 1U << 0, + /** Only a real subset of the class is allowed. */ + arch_register_req_type_limited = 1U << 1, + /** The register should be equal to another one at the node. */ + arch_register_req_type_should_be_same = 1U << 2, + /** The register must be unequal from some other at the node. */ + arch_register_req_type_must_be_different = 1U << 3, + /** The registernumber should be aligned (in case of multiregister values)*/ + arch_register_req_type_must_be_aligned = 1U << 4, + /** ignore while allocating registers */ + arch_register_req_type_ignore = 1U << 5, + /** the output produces a new value for the stack pointer + * (this is not really a constraint but a marker to guide the stackpointer + * rewiring logic) */ + arch_register_req_type_produces_sp = 1U << 6, } arch_register_req_type_t; extern const arch_register_req_t *arch_no_register_req; /** - * Format a register requirements information into a string. - * @param buf The string where to put it to. - * @param len The size of @p buf. + * Print information about a register requirement in human readable form + * @param F output stream/file * @param req The requirements structure to format. - * @return A pointer to buf. */ -extern char *arch_register_req_format(char *buf, size_t len, const arch_register_req_t *req, const ir_node *node); +void arch_dump_register_req(FILE *F, const arch_register_req_t *req, + const ir_node *node); + +void arch_dump_register_reqs(FILE *F, const ir_node *node); +void arch_dump_reqs_and_registers(FILE *F, const ir_node *node); /** - * Certain node classes which are relevant for the register allocator. + * Node classification. Used for statistics and for detecting reload nodes. */ typedef enum arch_irn_class_t { - arch_irn_class_normal = 1 << 0, - arch_irn_class_spill = 1 << 1, - arch_irn_class_reload = 1 << 2, - arch_irn_class_copy = 1 << 3, - arch_irn_class_perm = 1 << 4, - arch_irn_class_branch = 1 << 5, - arch_irn_class_call = 1 << 6, - arch_irn_class_load = 1 << 7, - arch_irn_class_store = 1 << 8, - arch_irn_class_stackparam = 1 << 9, + arch_irn_class_spill = 1 << 0, + arch_irn_class_reload = 1 << 1, + arch_irn_class_remat = 1 << 2, + arch_irn_class_copy = 1 << 3, + arch_irn_class_perm = 1 << 4 } arch_irn_class_t; -/** - * Some flags describing a node in more detail. - */ -typedef enum arch_irn_flags_t { - arch_irn_flags_none = 0, /**< Node flags. */ - arch_irn_flags_dont_spill = 1, /**< This must not be spilled. */ - arch_irn_flags_rematerializable = 2, /**< This can be replicated instead of spilled/reloaded. */ - arch_irn_flags_ignore = 4, /**< Ignore node during register allocation. */ - arch_irn_flags_modify_sp = 8, /**< I modify the stack pointer. */ - arch_irn_flags_last = arch_irn_flags_modify_sp -} arch_irn_flags_t; - -/** - * Get the string representation of a flag. - * This functions does not handle or'ed bitmasks of flags. - * @param flag The flag. - * @return The flag as a string. - */ -extern const char *arch_irn_flag_str(arch_irn_flags_t flag); - -extern const arch_irn_ops_t *arch_get_irn_ops(const arch_env_t *env, - const ir_node *irn); - -extern void arch_set_frame_offset(const arch_env_t *env, ir_node *irn, int bias); +void arch_set_frame_offset(ir_node *irn, int bias); -extern ir_entity *arch_get_frame_entity(const arch_env_t *env, const ir_node *irn); -extern void arch_set_frame_entity(const arch_env_t *env, ir_node *irn, ir_entity *ent); -extern int arch_get_sp_bias(const arch_env_t *env, ir_node *irn); +ir_entity *arch_get_frame_entity(const ir_node *irn); +int arch_get_sp_bias(ir_node *irn); -extern int arch_get_op_estimated_cost(const arch_env_t *env, const ir_node *irn); -extern arch_inverse_t *arch_get_inverse(const arch_env_t *env, const ir_node *irn, int i, arch_inverse_t *inverse, struct obstack *obstack); -extern int arch_possible_memory_operand(const arch_env_t *env, const ir_node *irn, unsigned int i); -extern void arch_perform_memory_operand(const arch_env_t *env, ir_node *irn, ir_node *spill, unsigned int i); +int arch_get_op_estimated_cost(const ir_node *irn); +arch_inverse_t *arch_get_inverse(const ir_node *irn, int i, + arch_inverse_t *inverse, + struct obstack *obstack); +int arch_possible_memory_operand(const ir_node *irn, + unsigned int i); +void arch_perform_memory_operand(ir_node *irn, ir_node *spill, + unsigned int i); /** * Get the register requirements for a node. - * @param env The architecture environment. - * @param req A pointer to a requirements structure, where the data can - * be put into. + * @note Deprecated API! Preferably use + * arch_get_in_register_req and + * arch_get_out_register_req. + * * @param irn The node. * @param pos The position of the operand you're interested in. - * @return A pointer to the register requirements which may not - * neccessarily be equal to @p req. If NULL is returned, the + * @return A pointer to the register requirements. If NULL is returned, the * operand was no register operand. */ -extern const arch_register_req_t * -arch_get_register_req(const arch_env_t *env, const ir_node *irn, int pos); - -/** - * Check if an operand is a register operand. - * @param env The environment. - * @param irn The node. - * @param pos The position of the operand. - * @return 1, if the operand is significant for register allocation, 0 - * if not. - */ -extern int arch_is_register_operand(const arch_env_t *env, - const ir_node *irn, int pos); - -/** - * Get the number of allocatable registers concerning - * a register class for an operand of a node. - * @param env The environment. - * @param irn The node. - * @param pos The postition of the node's operand. - * @param bs The bitset all allocatable registers shall be put into. - * Note, that you can also pass NULL here. If you don't, - * make sure, the bitset is as large as the register class - * has registers. - * @return The amount of registers allocatable for that operand. - */ -extern int arch_get_allocatable_regs(const arch_env_t *env, const ir_node *irn, int pos, bitset_t *bs); +const arch_register_req_t *arch_get_register_req(const ir_node *irn, int pos); /** * Put all registers which shall not be ignored by the register * allocator in a bit set. - * @param env The arch env. * @param cls The register class to consider. * @param bs The bit set to put the registers to. */ -extern void arch_put_non_ignore_regs(const arch_env_t *env, const arch_register_class_t *cls, bitset_t *bs); +extern void arch_put_non_ignore_regs(const arch_register_class_t *cls, + bitset_t *bs); /** * Check, if a register is assignable to an operand of a node. - * @param env The architecture environment. * @param irn The node. * @param pos The position of the operand. * @param reg The register. * @return 1, if the register might be allocated to the operand 0 if not. */ -extern int arch_reg_is_allocatable(const arch_env_t *env, - const ir_node *irn, int pos, const arch_register_t *reg); +int arch_reg_is_allocatable(const ir_node *irn, int pos, + const arch_register_t *reg); + +#define arch_reg_out_is_allocatable(irn, reg) arch_reg_is_allocatable(irn, -1, reg) /** * Get the register class of an operand of a node. - * @param env The architecture environment. * @param irn The node. * @param pos The position of the operand, -1 for the output. * @return The register class of the operand or NULL, if * operand is a non-register operand. */ -extern const arch_register_class_t * -arch_get_irn_reg_class(const arch_env_t *env, const ir_node *irn, int pos); +const arch_register_class_t *arch_get_irn_reg_class(const ir_node *irn, + int pos); + +#define arch_get_irn_reg_class_out(irn) arch_get_irn_reg_class(irn, -1) /** * Get the register allocated at a certain output operand of a node. - * @param env The arch environment. * @param irn The node. * @return The register allocated for this operand */ -extern const arch_register_t * -arch_get_irn_register(const arch_env_t *env, const ir_node *irn); +const arch_register_t *arch_get_irn_register(const ir_node *irn); +const arch_register_t *arch_irn_get_register(const ir_node *irn, int pos); /** * Set the register for a certain output operand. - * @param env The architecture environment. * @param irn The node. - * @param idx The index of the output operand. * @param reg The register. */ -extern void arch_set_irn_register(const arch_env_t *env, ir_node *irn, - const arch_register_t *reg); +void arch_set_irn_register(ir_node *irn, const arch_register_t *reg); +void arch_irn_set_register(ir_node *irn, int pos, const arch_register_t *reg); /** * Classify a node. - * @param env The architecture environment. * @param irn The node. * @return A classification of the node. */ -extern arch_irn_class_t arch_irn_classify(const arch_env_t *env, const ir_node *irn); - -#define arch_irn_class_is(env, irn, irn_class) ((arch_irn_classify(env, irn) & arch_irn_class_ ## irn_class) != 0) +arch_irn_class_t arch_irn_classify(const ir_node *irn); /** * Get the flags of a node. - * @param env The architecture environment. * @param irn The node. * @return The flags. */ -extern arch_irn_flags_t arch_irn_get_flags(const arch_env_t *env, const ir_node *irn); +arch_irn_flags_t arch_irn_get_flags(const ir_node *irn); -#define arch_irn_is(env, irn, flag) ((arch_irn_get_flags(env, irn) & arch_irn_flags_ ## flag) != 0) +void arch_irn_set_flags(ir_node *node, arch_irn_flags_t flags); +void arch_irn_add_flags(ir_node *node, arch_irn_flags_t flags); -#define arch_irn_has_reg_class(env, irn, pos, cls) \ - ((cls) == arch_get_irn_reg_class(env, irn, pos)) +#define arch_irn_is(irn, flag) ((arch_irn_get_flags(irn) & arch_irn_flags_ ## flag) != 0) -#define arch_irn_consider_in_reg_alloc(env, cls, irn) \ - (arch_irn_has_reg_class(env, irn, -1, cls) && !arch_irn_is(env, irn, ignore)) +/** + * Get the operations of an irn. + * @param self The handler from which the method is invoked. + * @param irn Some node. + * @return Operations for that irn. + */ +typedef const void *(arch_get_irn_ops_t)(const ir_node *irn); /** * Initialize the architecture environment struct. @@ -269,27 +227,613 @@ extern arch_irn_flags_t arch_irn_get_flags(const arch_env_t *env, const ir_node * @param file_handle The file handle * @return The environment. */ -extern arch_env_t *arch_env_init(arch_env_t *env, const arch_isa_if_t *isa, +extern arch_env_t *arch_env_init(const arch_isa_if_t *isa, FILE *file_handle, be_main_env_t *main_env); /** - * Add a node handler to the environment. - * @param env The environment. - * @param handler A node handler. - * @return The environment itself. + * Register an instruction set architecture */ -extern arch_env_t *arch_env_push_irn_handler(arch_env_t *env, const arch_irn_handler_t *handler); +void be_register_isa_if(const char *name, const arch_isa_if_t *isa); /** - * Remove a node handler from the handler stack. - * @param env The architecture environment. - * @return The popped handler. + * A register. */ -extern const arch_irn_handler_t *arch_env_pop_irn_handler(arch_env_t *env); +struct arch_register_t { + const char *name; /**< The name of the register. */ + const arch_register_class_t *reg_class; /**< The class of the register */ + unsigned index; /**< The index of the register in + the class. */ + arch_register_type_t type; /**< The type of the register. */ + /** register constraint allowing just this register */ + const arch_register_req_t *single_req; +}; + +static inline const arch_register_class_t *_arch_register_get_class( + const arch_register_t *reg) +{ + return reg->reg_class; +} + +static inline unsigned _arch_register_get_index(const arch_register_t *reg) +{ + return reg->index; +} + +static inline const char *_arch_register_get_name(const arch_register_t *reg) +{ + return reg->name; +} + +#define arch_register_get_class(reg) _arch_register_get_class(reg) +#define arch_register_get_index(reg) _arch_register_get_index(reg) +#define arch_register_get_name(reg) _arch_register_get_name(reg) /** - * Register an instruction set architecture + * Convenience macro to check for register type. + * @param req A pointer to register. + * @param kind The kind of type to check for (see arch_register_type_t). + * @return 1, If register is of given kind, 0 if not. */ -void be_register_isa_if(const char *name, const arch_isa_if_t *isa); +#define arch_register_type_is(reg, kind) \ + (((reg)->type & arch_register_type_ ## kind) != 0) + +/** + * A class of registers. + * Like general purpose or floating point. + */ +struct arch_register_class_t { + unsigned index; /**< index of this register class */ + const char *name; /**< The name of the register class.*/ + unsigned n_regs; /**< Number of registers in this + class. */ + ir_mode *mode; /**< The mode of the register class.*/ + const arch_register_t *regs; /**< The array of registers. */ + arch_register_class_flags_t flags; /**< register class flags. */ + const arch_register_req_t *class_req; +}; -#endif /* FIRM_BE_BEARCH_H */ +/** return the number of registers in this register class */ +#define arch_register_class_n_regs(cls) ((cls)->n_regs) + +/** return the largest mode of this register class */ +#define arch_register_class_mode(cls) ((cls)->mode) + +/** return the name of this register class */ +#define arch_register_class_name(cls) ((cls)->name) + +/** return the index of this register class */ +#define arch_register_class_index(cls) ((cls)->index) + +/** return the register class flags */ +#define arch_register_class_flags(cls) ((cls)->flags) + +static inline const arch_register_t *_arch_register_for_index( + const arch_register_class_t *cls, unsigned idx) +{ + assert(idx < cls->n_regs); + return &cls->regs[idx]; +} + +#define arch_register_for_index(cls, idx) _arch_register_for_index(cls, idx) + +/** + * Convenience macro to check for set constraints. + * @param req A pointer to register requirements. + * @param kind The kind of constraint to check for + * (see arch_register_req_type_t). + * @return 1, If the kind of constraint is present, 0 if not. + */ +#define arch_register_req_is(req, kind) \ + (((req)->type & (arch_register_req_type_ ## kind)) != 0) + +/** + * Expresses requirements to register allocation for an operand. + */ +struct arch_register_req_t { + arch_register_req_type_t type; /**< The type of the constraint. */ + const arch_register_class_t *cls; /**< The register class this constraint + belongs to. */ + const unsigned *limited; /**< allowed register bitset */ + unsigned other_same; /**< Bitmask of ins which should use the + same register (should_be_same). */ + unsigned other_different; /**< Bitmask of ins which shall use a + different register + (must_be_different) */ + unsigned char width; /**< specifies how many sequential + registers are required */ +}; + +static inline int reg_reqs_equal(const arch_register_req_t *req1, + const arch_register_req_t *req2) +{ + if (req1 == req2) + return 1; + + if (req1->type != req2->type + || req1->cls != req2->cls + || req1->other_same != req2->other_same + || req1->other_different != req2->other_different) + return 0; + + if (req1->limited != NULL) { + size_t n_regs; + + if (req2->limited == NULL) + return 0; + + n_regs = arch_register_class_n_regs(req1->cls); + if (!rbitsets_equal(req1->limited, req2->limited, n_regs)) + return 0; + } + + return 1; +} + +/** + * An inverse operation returned by the backend + */ +struct arch_inverse_t { + int n; /**< count of nodes returned in nodes array */ + int costs; /**< costs of this remat */ + + /** nodes for this inverse operation. shall be in schedule order. + * last element is the target value */ + ir_node **nodes; +}; + +struct arch_irn_ops_t { + + /** + * Get the register requirements for a given operand. + * @param irn The node. + * @param pos The operand's position + * @return The register requirements for the selected operand. + * The pointer returned is never NULL. + */ + const arch_register_req_t *(*get_irn_reg_req_in)(const ir_node *irn, + int pos); + + /** + * Classify the node. + * @param irn The node. + * @return A classification. + */ + arch_irn_class_t (*classify)(const ir_node *irn); + + /** + * Get the entity on the stack frame this node depends on. + * @param irn The node in question. + * @return The entity on the stack frame or NULL, if the node does not have + * a stack frame entity. + */ + ir_entity *(*get_frame_entity)(const ir_node *irn); + + /** + * Set the offset of a node carrying an entity on the stack frame. + * @param irn The node. + * @param offset The offset of the node's stack frame entity. + */ + void (*set_frame_offset)(ir_node *irn, int offset); + + /** + * Returns the delta of the stackpointer for nodes that increment or + * decrement the stackpointer with a constant value. (push, pop + * nodes on most architectures). + * A positive value stands for an expanding stack area, a negative value for + * a shrinking one. + * + * @param irn The node + * @return 0 if the stackpointer is not modified with a constant + * value, otherwise the increment/decrement value + */ + int (*get_sp_bias)(const ir_node *irn); + + /** + * Returns an inverse operation which yields the i-th argument + * of the given node as result. + * + * @param irn The original operation + * @param i Index of the argument we want the inverse operation to + * yield + * @param inverse struct to be filled with the resulting inverse op + * @param obstack The obstack to use for allocation of the returned nodes + * array + * @return The inverse operation or NULL if operation invertible + */ + arch_inverse_t *(*get_inverse)(const ir_node *irn, int i, + arch_inverse_t *inverse, + struct obstack *obstack); + + /** + * Get the estimated cycle count for @p irn. + * + * @param irn The node. + * @return The estimated cycle count for this operation + */ + int (*get_op_estimated_cost)(const ir_node *irn); + + /** + * Asks the backend whether operand @p i of @p irn can be loaded form memory + * internally + * + * @param irn The node. + * @param i Index of the argument we would like to know whether @p irn + * can load it form memory internally + * @return nonzero if argument can be loaded or zero otherwise + */ + int (*possible_memory_operand)(const ir_node *irn, unsigned int i); + + /** + * Ask the backend to assimilate @p reload of operand @p i into @p irn. + * + * @param irn The node. + * @param spill The spill. + * @param i The position of the reload. + */ + void (*perform_memory_operand)(ir_node *irn, ir_node *spill, + unsigned int i); +}; + +/** + * The code generator interface. + */ +struct arch_code_generator_if_t { + /** + * Initialize the code generator. + * @param irg A graph + * @return A newly created code generator. + */ + void *(*init)(ir_graph *irg); + + /** + * return node used as base in pic code addresses + */ + ir_node* (*get_pic_base)(void *self); + + /** + * Called before abi introduce. + */ + void (*before_abi)(void *self); + + /** + * Called, when the graph is being normalized. + */ + void (*prepare_graph)(void *self); + + /** + * Backend may provide an own spiller. + * This spiller needs to spill all register classes. + */ + void (*spill)(void *self, ir_graph *irg); + + /** + * Called before register allocation. + */ + void (*before_ra)(void *self); + + /** + * Called after register allocation. + */ + void (*after_ra)(void *self); + + /** + * Called directly before done is called. This should be the last place + * where the irg is modified. + */ + void (*finish)(void *self); + + /** + * Called after everything happened. This call should emit the final + * assembly code but avoid changing the irg. + * The code generator must also be de-allocated here. + */ + void (*done)(void *self); +}; + +/** + * helper macro: call function func from the code generator + * if it's implemented. + */ +#define _arch_cg_call(cg, func) \ +do { \ + if((cg)->impl->func) \ + (cg)->impl->func(cg); \ +} while(0) + +#define _arch_cg_call_env(cg, env, func) \ +do { \ + if((cg)->impl->func) \ + (cg)->impl->func(cg, env); \ +} while(0) + +#define arch_code_generator_before_abi(cg) _arch_cg_call(cg, before_abi) +#define arch_code_generator_prepare_graph(cg) _arch_cg_call(cg, prepare_graph) +#define arch_code_generator_before_ra(cg) _arch_cg_call(cg, before_ra) +#define arch_code_generator_after_ra(cg) _arch_cg_call(cg, after_ra) +#define arch_code_generator_finish(cg) _arch_cg_call(cg, finish) +#define arch_code_generator_done(cg) _arch_cg_call(cg, done) +#define arch_code_generator_spill(cg, irg) _arch_cg_call_env(cg, irg, spill) +#define arch_code_generator_has_spiller(cg) ((cg)->impl->spill != NULL) +#define arch_code_generator_get_pic_base(cg) \ + ((cg)->impl->get_pic_base != NULL ? (cg)->impl->get_pic_base(cg) : NULL) + +/** + * Code generator base class. + */ +struct arch_code_generator_t { + const arch_code_generator_if_t *impl; +}; + +/** + * Architecture interface. + */ +struct arch_isa_if_t { + /** + * Initialize the isa interface. + * @param file_handle the file handle to write the output to + * @return a new isa instance + */ + arch_env_t *(*init)(FILE *file_handle); + + /** + * Free the isa instance. + */ + void (*done)(void *self); + + /** + * Called directly after initialization. Backend should handle all + * intrinsics here. + */ + void (*handle_intrinsics)(void); + + /** + * Get the the number of register classes in the isa. + * @return The number of register classes. + */ + unsigned (*get_n_reg_class)(void); + + /** + * Get the i-th register class. + * @param i The number of the register class. + * @return The register class. + */ + const arch_register_class_t *(*get_reg_class)(unsigned i); + + /** + * Get the register class which shall be used to store a value of a given + * mode. + * @param self The this pointer. + * @param mode The mode in question. + * @return A register class which can hold values of the given mode. + */ + const arch_register_class_t *(*get_reg_class_for_mode)(const ir_mode *mode); + + /** + * Get the ABI restrictions for procedure calls. + * @param self The this pointer. + * @param call_type The call type of the method (procedure) in question. + * @param p The array of parameter locations to be filled. + */ + void (*get_call_abi)(const void *self, ir_type *call_type, + be_abi_call_t *abi); + + /** + * Get the code generator interface. + * @param self The this pointer. + * @return Some code generator interface. + */ + const arch_code_generator_if_t *(*get_code_generator_if)(void *self); + + /** + * Get the list scheduler to use. There is already a selector given, the + * backend is free to modify and/or ignore it. + * + * @param self The isa object. + * @param selector The selector given by options. + * @return The list scheduler selector. + */ + const list_sched_selector_t *(*get_list_sched_selector)(const void *self, + list_sched_selector_t *selector); + + /** + * Get the ILP scheduler to use. + * @param self The isa object. + * @return The ILP scheduler selector + */ + const ilp_sched_selector_t *(*get_ilp_sched_selector)(const void *self); + + /** + * Get the necessary alignment for storing a register of given class. + * @param self The isa object. + * @param cls The register class. + * @return The alignment in bytes. + */ + int (*get_reg_class_alignment)(const arch_register_class_t *cls); + + /** + * A "static" function, returns the frontend settings + * needed for this backend. + */ + const backend_params *(*get_params)(void); + + /** + * Returns an 2-dim array of execution units, @p irn can be executed on. + * The first dimension is the type, the second the allowed units of this + * type. + * Each dimension is a NULL terminated list. + * @param self The isa object. + * @param irn The node. + * @return An array of allowed execution units. + * exec_unit = { + * { unit1_of_tp1, ..., unitX1_of_tp1, NULL }, + * ..., + * { unit1_of_tpY, ..., unitXn_of_tpY, NULL }, + * NULL + * }; + */ + const be_execution_unit_t ***(*get_allowed_execution_units)( + const ir_node *irn); + + /** + * Return the abstract machine for this isa. + * @param self The isa object. + */ + const be_machine_t *(*get_machine)(const void *self); + + /** + * Return an ordered list of irgs where code should be generated for. + * If NULL is returned, all irg will be taken into account and they will be + * generated in an arbitrary order. + * @param self The isa object. + * @param irgs A flexible array ARR_F of length 0 where the backend can + * append the desired irgs. + * @return A flexible array ARR_F containing all desired irgs in the + * desired order. + */ + ir_graph **(*get_backend_irg_list)(const void *self, ir_graph ***irgs); + + /** + * mark node as rematerialized + */ + void (*mark_remat)(ir_node *node); + + /** + * parse an assembler constraint part and set flags according to its nature + * advances the *c pointer to point to the last parsed character (so if you + * parse a single character don't advance c) + */ + asm_constraint_flags_t (*parse_asm_constraint)(const char **c); + + /** + * returns true if the string is a valid clobbered (register) in this + * backend + */ + int (*is_valid_clobber)(const char *clobber); +}; + +#define arch_env_done(env) ((env)->impl->done(env)) +#define arch_env_handle_intrinsics(env) \ + do { if((env)->impl->handle_intrinsics != NULL) (env)->impl->handle_intrinsics(); } while(0) +#define arch_env_get_n_reg_class(env) ((env)->impl->get_n_reg_class()) +#define arch_env_get_reg_class(env,i) ((env)->impl->get_reg_class(i)) +#define arch_env_get_reg_class_for_mode(env,mode) ((env)->impl->get_reg_class_for_mode((mode))) +#define arch_env_get_call_abi(env,tp,abi) ((env)->impl->get_call_abi((env), (tp), (abi))) +#define arch_env_get_code_generator_if(env) ((env)->impl->get_code_generator_if((env))) +#define arch_env_get_list_sched_selector(env,selector) ((env)->impl->get_list_sched_selector((env), (selector))) +#define arch_env_get_ilp_sched_selector(env) ((env)->impl->get_ilp_sched_selector(env)) +#define arch_env_get_reg_class_alignment(env,cls) ((env)->impl->get_reg_class_alignment((cls))) +#define arch_env_get_params(env) ((env)->impl->get_params()) +#define arch_env_get_allowed_execution_units(env,irn) ((env)->impl->get_allowed_execution_units((irn))) +#define arch_env_get_machine(env) ((env)->impl->get_machine(env)) +#define arch_env_get_backend_irg_list(env,irgs) ((env)->impl->get_backend_irg_list((env), (irgs))) +#define arch_env_parse_asm_constraint(env,c) ((env)->impl->parse_asm_constraint((c)) +#define arch_env_is_valid_clobber(env,clobber) ((env)->impl->is_valid_clobber((clobber)) +#define arch_env_mark_remat(env,node) \ + do { if ((env)->impl->mark_remat != NULL) (env)->impl->mark_remat((node)); } while(0) + +/** + * ISA base class. + */ +struct arch_env_t { + const arch_isa_if_t *impl; + const arch_register_t *sp; /**< The stack pointer register. */ + const arch_register_t *bp; /**< The base pointer register. */ + const arch_register_class_t *link_class; /**< The static link pointer + register class. */ + int stack_dir; /**< -1 for decreasing, 1 for + increasing. */ + int stack_alignment; /**< power of 2 stack alignment */ + const be_main_env_t *main_env; /**< the be main environment */ + int spill_cost; /**< cost for a be_Spill node */ + int reload_cost; /**< cost for a be_Reload node */ + bool custom_abi : 1; /**< backend does all abi handling + and does not need the generic stuff + from beabi.h/.c */ +}; + +static inline unsigned arch_irn_get_n_outs(const ir_node *node) +{ + backend_info_t *info = be_get_info(node); + if (info->out_infos == NULL) + return 0; + + return ARR_LEN(info->out_infos); +} + +static inline const arch_irn_ops_t *get_irn_ops_simple(const ir_node *node) +{ + const ir_op *ops = get_irn_op(node); + const arch_irn_ops_t *be_ops = get_op_ops(ops)->be_ops; + assert(!is_Proj(node)); + return be_ops; +} + +static inline const arch_register_req_t *arch_get_register_req_out( + const ir_node *irn) +{ + int pos = 0; + backend_info_t *info; + + /* you have to query the Proj nodes for the constraints (or use + * arch_get_out_register_req. Querying a mode_T node and expecting + * arch_no_register_req is a bug in your code! */ + assert(get_irn_mode(irn) != mode_T); + + if (is_Proj(irn)) { + pos = get_Proj_proj(irn); + irn = get_Proj_pred(irn); + } + + info = be_get_info(irn); + if (info->out_infos == NULL) + return arch_no_register_req; + + return info->out_infos[pos].req; +} + +static inline bool arch_irn_is_ignore(const ir_node *irn) +{ + const arch_register_req_t *req = arch_get_register_req_out(irn); + return !!(req->type & arch_register_req_type_ignore); +} + +static inline bool arch_irn_consider_in_reg_alloc( + const arch_register_class_t *cls, const ir_node *node) +{ + const arch_register_req_t *req = arch_get_register_req_out(node); + return + req->cls == cls && + !(req->type & arch_register_req_type_ignore); +} + +/** + * Get register constraints for an operand at position @p + */ +static inline const arch_register_req_t *arch_get_in_register_req( + const ir_node *node, int pos) +{ + const arch_irn_ops_t *ops = get_irn_ops_simple(node); + return ops->get_irn_reg_req_in(node, pos); +} + +/** + * Get register constraint for a produced result (the @p pos result) + */ +static inline const arch_register_req_t *arch_get_out_register_req( + const ir_node *node, int pos) +{ + const backend_info_t *info = be_get_info(node); + if (info->out_infos == NULL) + return arch_no_register_req; + return info->out_infos[pos].req; +} + +static inline void arch_set_out_register_req(ir_node *node, int pos, + const arch_register_req_t *req) +{ + backend_info_t *info = be_get_info(node); + assert(pos < (int) arch_irn_get_n_outs(node)); + info->out_infos[pos].req = req; +} + +#endif