X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;ds=sidebyside;f=ir%2Fbe%2Fbearch.h;h=d1f84e55215d276876b79cd8924ac02286b8e389;hb=39e27d1fe336c1238bfe4a7b614d103762e39ba2;hp=060d0b9aeae7b2547b1b53a764daa488680b17b8;hpb=c1c447c21f5b86229fa44b44973c9abf6b67193f;p=libfirm diff --git a/ir/be/bearch.h b/ir/be/bearch.h index 060d0b9ae..d1f84e552 100644 --- a/ir/be/bearch.h +++ b/ir/be/bearch.h @@ -19,7 +19,7 @@ struct _be_node_factory_t; typedef enum _arch_register_type_t { - arch_register_type_none = 0, + 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. */ @@ -177,15 +177,32 @@ extern char *arch_register_req_format(char *buf, size_t len, const arch_register * Certain node classes which are relevant for the register allocator. */ typedef enum _arch_irn_class_t { - arch_irn_class_normal, - arch_irn_class_spill, - arch_irn_class_reload, - arch_irn_class_copy, - arch_irn_class_perm, - arch_irn_class_branch, - arch_irn_class_call + 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_const = 1 << 7, + arch_irn_class_load = 1 << 8, + arch_irn_class_store = 1 << 9, + arch_irn_class_stackparam = 1 << 10, } arch_irn_class_t; +/** + * An inverse operation returned by the backend + */ +typedef 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; +} arch_inverse_t; + /** * Some flags describing a node in more detail. */ @@ -194,7 +211,8 @@ typedef enum _arch_irn_flags_t { arch_irn_flags_dont_spill = 1, /**< This must not be spilled. */ arch_irn_flags_rematerializable = 2, /**< This should be replicated instead of spilled/reloaded. */ arch_irn_flags_ignore = 4, /**< Ignore node during register allocation. */ - arch_irn_flags_last = arch_irn_flags_ignore + arch_irn_flags_modify_sp = 8, /**< I modify the stack pointer. */ + arch_irn_flags_last = arch_irn_flags_modify_sp } arch_irn_flags_t; /** @@ -262,6 +280,14 @@ struct _arch_irn_ops_if_t { */ entity *(*get_frame_entity)(const void *self, const ir_node *irn); + /** + * Set the entity on the stack frame this node depends on. + * @param self The this pointer. + * @param irn The node in question. + * @param ent The entity to set + */ + void (*set_frame_entity)(const void *self, ir_node *irn, entity *ent); + /** * Set the offset of a node carrying an entity on the stack frame. * @param self The this pointer. @@ -269,6 +295,64 @@ struct _arch_irn_ops_if_t { * @param offset The offset of the node's stack frame entity. */ void (*set_frame_offset)(const void *self, 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 self The this pointer + * @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 void *self, const ir_node *irn); + + /** + * Returns an inverse operation which yields the i-th argument + * of the given node as result. + * + * @param self The this pointer. + * @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 void *self, const ir_node *irn, int i, arch_inverse_t *inverse, struct obstack *obstack); + + /** + * Get the estimated cycle count for @p irn. + * + * @param self The this pointer. + * @param irn The node. + * + * @return The estimated cycle count for this operation + */ + int (*get_op_estimated_cost)(const void *self, const ir_node *irn); + + /** + * Asks the backend whether operand @p i of @p irn can be loaded form memory internally + * + * @param self The this pointer. + * @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 void *self, const ir_node *irn, unsigned int i); + + /** + * Ask the backend to assimilate @p reload of operand @p i into @p irn. + * + * @param self The this pointer. + * @param irn The node. + * @param spill The spill. + * @param i The position of the reload. + */ + void (*perform_memory_operand)(const void *self, ir_node *irn, ir_node *spill, unsigned int i); }; /** @@ -278,9 +362,18 @@ struct _arch_irn_ops_t { const arch_irn_ops_if_t *impl; }; +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); extern entity *arch_get_frame_entity(const arch_env_t *env, ir_node *irn); +extern void arch_set_frame_entity(const arch_env_t *env, ir_node *irn, entity *ent); +extern int arch_get_sp_bias(const arch_env_t *env, 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); /** * Get the register requirements for a node. @@ -331,6 +424,15 @@ extern int arch_get_allocatable_regs(const arch_env_t *env, const ir_node *irn, */ extern void arch_put_non_ignore_regs(const arch_env_t *env, const arch_register_class_t *cls, bitset_t *bs); +/** + * Return the number of registers in a register class which should not be + * ignored by the register allocator. + * @param env The architecture environment. + * @param cls The register class to consider + * @return The number of non-ignore registers in the register class + */ +extern int arch_count_non_ignore_regs(const arch_env_t *env, const arch_register_class_t *cls); + /** * Check, if a register is assignable to an operand of a node. * @param env The architecture environment. @@ -380,6 +482,8 @@ extern void arch_set_irn_register(const arch_env_t *env, ir_node *irn, */ 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) + /** * Get the flags of a node. * @param env The architecture environment. @@ -417,11 +521,10 @@ struct _arch_irn_handler_t { struct _arch_code_generator_if_t { /** * Initialize the code generator. - * @param file The file to dump to. * @param birg A backend IRG session. * @return A newly created code generator. */ - void *(*init)(FILE *file, const be_irg_t *birg); + void *(*init)(const be_irg_t *birg); /** * Called before abi introduce. @@ -449,7 +552,14 @@ struct _arch_code_generator_if_t { void (*after_ra)(void *self); /** - * Called after everything happened. + * 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); @@ -470,6 +580,7 @@ do { \ #define arch_code_generator_before_sched(cg) _arch_cg_call(cg, before_sched) #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) /** @@ -500,8 +611,10 @@ 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 */ - void *(*init)(void); + void *(*init)(FILE *file_handle); /** * Free the isa instance. @@ -567,11 +680,17 @@ struct _arch_isa_if_t { */ int (*get_reg_class_alignment)(const void *self, const arch_register_class_t *cls); + /** + * A "static" function, returns the frontend settings + * needed for this backend. + */ + const backend_params *(*get_params)(void); + #ifdef WITH_LIBCORE - /** - * Register command line options for this backend. - * @param grp The root group. - */ + /** + * Register command line options for this backend. + * @param grp The root group. + */ void (*register_options)(lc_opt_entry_t *grp); #endif }; @@ -610,10 +729,11 @@ struct _arch_env_t { /** * Initialize the architecture environment struct. - * @param isa The isa which shall be put into the environment. + * @param isa The isa which shall be put into the environment. + * @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(arch_env_t *env, const arch_isa_if_t *isa, FILE *file_handle); /** * Add a node handler to the environment. @@ -630,4 +750,5 @@ extern arch_env_t *arch_env_push_irn_handler(arch_env_t *env, const arch_irn_han */ extern const arch_irn_handler_t *arch_env_pop_irn_handler(arch_env_t *env); + #endif /* _FIRM_BEARCH_H */