3 * Backend ABI implementation.
9 #include "firm_types.h"
19 /** Flag: if set, try to omit the frame pointer if alled by the backend */
20 extern int be_omit_fp;
22 struct _be_abi_call_flags_bits_t {
23 unsigned left_to_right : 1; /**< Arguments are from left to right. */
24 unsigned store_args_sequential : 1; /**< Use sequential stores for arguments. */
25 unsigned try_omit_fp : 1; /**< Try to omit the frame pointer. */
26 unsigned fp_free : 1; /**< The function can use any register as frame pointer. */
27 unsigned call_has_imm : 1; /**< A call can take the callee's address as an immediate. */
28 unsigned irg_is_leaf : 1; /**< 1, if the IRG is a leaf function. */
29 unsigned frame_is_setup_on_call : 1; /**< Set to one, if there is already enough room on the stack for call args. */
32 union _be_abi_call_flags_t {
33 be_abi_call_flags_bits_t bits;
37 struct _be_abi_callbacks_t {
39 * Initialize the callback object.
40 * @param call The call object.
41 * @param aenv The architecture environment.
42 * @param irg The graph with the method.
43 * @return Some pointer. This pointer is passed to all other callback functions as self object.
45 void *(*init)(const be_abi_call_t *call, const arch_env_t *aenv, ir_graph *irg);
48 * Destroy the callback object.
49 * @param self The callback object.
51 void (*done)(void *self);
54 * Get the between type for that call.
55 * @param self The callback object.
56 * @return The between type of for that call.
58 ir_type *(*get_between_type)(void *self);
61 * Put all registers which are saved by the prologue/epilogue in a set.
62 * @param self The callback object.
65 void (*regs_saved_by_me)(void *self, pset *regs);
68 * Generate the prologue.
69 * @param self The callback object.
70 * @param mem A pointer to the mem node. Update this if you define new memory.
71 * @param reg_map A mapping mapping all callee_save/ignore/parameter registers to their defining nodes.
72 * @return The register which shall be used as a stack frame base.
74 * All nodes which define registers in @p reg_map must keep @p reg_map current.
76 const arch_register_t *(*prologue)(void *self, ir_node **mem, pmap *reg_map);
79 * Generate the epilogue.
80 * @param self The callback object.
81 * @param mem Memory one can attach to.
82 * @param reg_map A mapping mapping all callee_save/ignore/return registers to their defining nodes.
84 * All nodes which define registers in @p reg_map must keep @p reg_map current.
85 * Also, the @p mem variable must be updated, if memory producing nodes are inserted.
87 void (*epilogue)(void *self, ir_node *bl, ir_node **mem, pmap *reg_map);
91 * Set the flags for a call.
92 * @param call The call.
93 * @param flags Some flags to be set.
94 * @param cb The call callbacks for that call.
95 * @note The ABI phase might change the flags due to analysis.
97 void be_abi_call_set_flags(be_abi_call_t *call, be_abi_call_flags_t flags, const be_abi_callbacks_t *cb);
99 void be_abi_call_param_stack(be_abi_call_t *call, int pos, unsigned alignment, unsigned space_before, unsigned space_after);
100 void be_abi_call_param_reg(be_abi_call_t *call, int pos, const arch_register_t *reg);
101 void be_abi_call_res_reg(be_abi_call_t *call, int pos, const arch_register_t *reg);
104 * Get the flags of a ABI call object.
105 * Note that the flags must not be the same as set by be_abi_call_set_flags(). Analysis may have
106 * altered several flags, so getting them from the call object is always a good idea.
107 * @param call The call object.
110 be_abi_call_flags_t be_abi_call_get_flags(const be_abi_call_t *call);
113 * Get the method type of an ABI call object.
114 * @param call The call object.
115 * @return The method type for that call object.
117 ir_type *be_abi_call_get_method_type(const be_abi_call_t *call);
119 be_abi_irg_t *be_abi_introduce(be_irg_t *bi);
120 void be_abi_fix_stack_bias(be_abi_irg_t *env);
121 void be_abi_fix_stack_nodes(be_abi_irg_t *env);
122 void be_abi_free(be_abi_irg_t *abi);
124 void be_abi_put_ignore_regs(be_abi_irg_t *abi, const arch_register_class_t *cls, bitset_t *bs);
126 ir_node *be_abi_get_callee_save_irn(be_abi_irg_t *abi, const arch_register_t *reg);
128 #define be_abi_reg_map_get(map, reg) pmap_get((map), (void *) (reg))
129 #define be_abi_reg_map_set(map, reg, irn) pmap_insert((map), (void *) (reg), (irn))
131 #endif /* _BEABI_H */