#ifndef _FIRM_BEARCH_H
#define _FIRM_BEARCH_H
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
+#include "firm_config.h"
#ifdef WITH_LIBCORE
#include <libcore/lc_opts.h>
#endif
-#include "irnode.h"
-#include "irmode.h"
+#include "firm_types.h"
#include "bitset.h"
-#include "hashptr.h"
-#include "fourcc.h"
-#include "set.h"
-#include "list.h"
-#include "ident.h"
#include "belistsched.h"
-
-typedef struct _arch_register_class_t arch_register_class_t;
-typedef struct _arch_register_t arch_register_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;
+#include "beabi_t.h"
+#include "bearch_t.h"
+#include "be_t.h"
struct _be_node_factory_t;
typedef enum _arch_register_type_t {
- arch_register_type_none = 0,
- arch_register_type_write_invariant,
- arch_register_type_caller_saved, /**< 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_saved, /**< The register must be saved by the called function,
- it thus survives a function call. */
- arch_register_type_ignore /**< Do not consider this register when allocating. */
+ 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_t;
/**
* @return 1, If register is of given kind, 0 if not.
*/
#define arch_register_type_is(reg, kind) \
- ((reg)->type == arch_register_type_ ## kind)
+ (((reg)->type & arch_register_type_ ## kind) != 0)
/**
* A register.
struct _arch_register_class_t {
const char *name; /**< The name of the register class. */
int 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. */
};
+/** 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)
+
/**
* Put all registers in a class into a bitset.
* @param cls The class.
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 */
} arch_register_req_type_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. */
- void (*limited)(const ir_node *irn, int pos, bitset_t *bs);
+ void (*limited)(void *limited_env, bitset_t *bs);
/**< In case of the 'limited'
constraint, this function
must put all allowable
return the number of registers
in the bitset. */
- ir_node *other; /**< In case of "should be equal"
- or should be different, this gives
- the node to whose register this
- one's should be the same/different. */
+ void *limited_env; /**< This must passed to limited. */
+
+ ir_node *other_same; /**< The other which shall have the same reg
+ as this one. (for case should_be_same). */
+
+ ir_node *other_different; /**< The other node from which this one's register
+ must be different (case must_be_different). */
} arch_register_req_t;
+/**
+ * Format a register requirements information into a string.
+ * @param buf The string where to put it to.
+ * @param len The size of @p buf.
+ * @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);
+
+
/**
* 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.
*/
typedef enum _arch_irn_flags_t {
- arch_irn_flags_spillable = 1,
- arch_irn_flags_rematerializable = 2
+ arch_irn_flags_none = 0, /**< Node flags. */
+ 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_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);
+
struct _arch_irn_ops_if_t {
/**
*/
arch_irn_flags_t (*get_flags)(const void *self, const ir_node *irn);
+ /**
+ * Get the entity on the stack frame this node depends on.
+ * @param self The this pointer.
+ * @param irn The node in question.
+ * @return The entity on the stack frame or NULL, if the node does not has a stack frame entity.
+ */
+ 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.
+ * @param irn The node.
+ * @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);
};
/**
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.
* @param env The architecture environment.
* @param env The environment.
* @param irn The node.
* @param pos The postition of the node's operand.
- * @param cls The register class.
* @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, const arch_register_class_t *cls, bitset_t *bs);
+extern int arch_get_allocatable_regs(const arch_env_t *env, const ir_node *irn, int pos, bitset_t *bs);
+
+/**
+ * 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);
+
+/**
+ * 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.
* 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.
+ * @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 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.
*/
extern arch_irn_flags_t arch_irn_get_flags(const arch_env_t *env, const ir_node *irn);
+#define arch_irn_is(env, irn, flag) ((arch_irn_get_flags(env, irn) & arch_irn_flags_ ## flag) != 0)
+
#define arch_irn_has_reg_class(env, irn, pos, cls) \
((cls) == arch_get_irn_reg_class(env, irn, pos))
+#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))
+
/**
- * Somebody who can be asked about nodes.
+ * Somebody who can be asked about IR nodes.
*/
struct _arch_irn_handler_t {
*/
const void *(*get_irn_ops)(const arch_irn_handler_t *handler,
const ir_node *irn);
-
};
/**
- * The code generator.
+ * The code generator interface.
*/
struct _arch_code_generator_if_t {
-
-
/**
* Initialize the code generator.
- * @param file The file to dump to.
- * @param irg The function to generate code for.
- * @param env The architecture environment.
+ * @param birg A backend IRG session.
* @return A newly created code generator.
*/
- void *(*init)(FILE *file, ir_graph *irg, const arch_env_t *env);
+ void *(*init)(const be_irg_t *birg);
+
+ /**
+ * Called before abi introduce.
+ */
+ void (*before_abi)(void *self);
/**
* Called, when the graph is being normalized.
void (*before_ra)(void *self);
/**
- * Called after register allocation to lower Spills to Stores
+ * Called after register allocation.
*/
- ir_node *(*lower_spill)(void *self, ir_node *spill);
+ void (*after_ra)(void *self);
/**
- * Called after register allocation to lower Reloads to Loads
+ * Called directly before done is called. This should be the last place
+ * where the irg is modified.
*/
- ir_node *(*lower_reload)(void *self, ir_node *reload);
+ void (*finish)(void *self);
/**
- * Called after everything happened.
+ * 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_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_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)
/**
*/
struct _arch_isa_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 int stack_dir; /** -1 for decreasing, 1 for increasing. */
};
+#define arch_isa_stack_dir(isa) ((isa)->stack_dir)
+#define arch_isa_sp(isa) ((isa)->sp)
+#define arch_isa_bp(isa) ((isa)->bp)
+
/**
* Architecture interface.
*/
struct _arch_isa_if_t {
-#ifdef WITH_LIBCORE
- void (*register_options)(lc_opt_entry_t *grp);
-#endif
-
/**
* 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.
*/
const arch_register_class_t *(*get_reg_class)(const void *self, int 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 void *self, const ir_mode *mode);
+
+ /**
+ * Get the ABI restrictions for procedure calls.
+ * @param self The this pointer.
+ * @param method_type The 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 *method_type, be_abi_call_t *abi);
+
/**
* The irn handler for this architecture.
* The irn handler is registered by the Firm back end
const list_sched_selector_t *(*get_list_sched_selector)(const void *self);
/**
- * Get the proj number assigned to the register.
+ * Get the necessary alignment for storing a register of given class.
* @param self The isa object.
- * @param reg The register
- * @return The proj number assigned to this register
+ * @param cls The register class.
+ * @return The alignment in bytes.
+ */
+ 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.
*/
- long (*get_projnum_for_register)(const void *self, const arch_register_t *reg);
+ void (*register_options)(lc_opt_entry_t *grp);
+#endif
};
-#define arch_isa_get_n_reg_class(isa) ((isa)->impl->get_n_reg_class(isa))
-#define arch_isa_get_reg_class(isa,i) ((isa)->impl->get_reg_class(isa, i))
-#define arch_isa_get_irn_handler(isa) ((isa)->impl->get_irn_handler(isa))
-#define arch_isa_make_code_generator(isa,irg) ((isa)->impl->make_code_generator(isa, irg))
+#define arch_isa_get_n_reg_class(isa) ((isa)->impl->get_n_reg_class(isa))
+#define arch_isa_get_reg_class(isa,i) ((isa)->impl->get_reg_class(isa, i))
+#define arch_isa_get_irn_handler(isa) ((isa)->impl->get_irn_handler(isa))
+#define arch_isa_get_call_abi(isa,tp,abi) ((isa)->impl->get_call_abi((isa), (tp), (abi)))
+#define arch_isa_get_reg_class_for_mode(isa,mode) ((isa)->impl->get_reg_class_for_mode((isa), (mode)))
+#define arch_isa_make_code_generator(isa,irg) ((isa)->impl->make_code_generator((isa), (irg)))
+#define arch_isa_get_reg_class_alignment(isa, cls) ((isa)->impl->get_reg_class_alignment((isa), (cls)))
#define ARCH_MAX_HANDLERS 8
/**
* 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.
* @param handler A node handler.
* @return The environment itself.
*/
-extern arch_env_t *arch_env_add_irn_handler(arch_env_t *env,
- const arch_irn_handler_t *handler);
+extern arch_env_t *arch_env_push_irn_handler(arch_env_t *env, const arch_irn_handler_t *handler);
+
+/**
+ * Remove a node handler from the handler stack.
+ * @param env The architecture environment.
+ * @return The popped handler.
+ */
+extern const arch_irn_handler_t *arch_env_pop_irn_handler(arch_env_t *env);
+
#endif /* _FIRM_BEARCH_H */
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