3 * Backend ABI implementation.
9 #include "firm_types.h"
18 struct _be_abi_call_flags_bits_t {
19 unsigned left_to_right : 1; /**< Arguments are from left to right. */
20 unsigned store_args_sequential : 1; /**< Use sequential stores for arguments. */
21 unsigned try_omit_fp : 1; /**< Try to omit the frame pointer. */
22 unsigned fp_free : 1; /**< The function can use any register as frame pointer. */
23 unsigned call_has_imm : 1; /**< A call can take the callee's address as an immediate. */
24 unsigned irg_is_leaf : 1; /**< 1, if the IRG is a leaf function. */
25 unsigned frame_is_setup_on_call : 1; /**< Set to one, if there is already enough room on the stack for call args. */
28 union _be_abi_call_flags_t {
29 be_abi_call_flags_bits_t bits;
33 struct _be_abi_callbacks_t {
35 * Initialize the callback object.
36 * @param call The call object.
37 * @param aenv The architecture environment.
38 * @param irg The graph with the method.
39 * @return Some pointer. This pointer is passed to all other callback functions as self object.
41 void *(*init)(const be_abi_call_t *call, const arch_env_t *aenv, ir_graph *irg);
44 * Destroy the callback object.
45 * @param self The callback object.
47 void (*done)(void *self);
50 * Get the between type for that call.
51 * @param self The callback object.
52 * @return The between type of for that call.
54 ir_type *(*get_between_type)(void *self);
57 * Put all registers which are saved by the prologue/epilogue in a set.
58 * @param self The callback object.
61 void (*regs_saved_by_me)(void *self, pset *regs);
64 * Generate the prologue.
65 * @param self The callback object.
66 * @param mem A pointer to the mem node. Update this if you define new memory.
67 * @param reg_map A mapping mapping all callee_save/ignore/parameter registers to their defining nodes.
68 * @return The register which shall be used as a stack frame base.
70 * All nodes which define registers in @p reg_map must keep @p reg_map current.
72 const arch_register_t *(*prologue)(void *self, ir_node **mem, pmap *reg_map);
75 * Generate the epilogue.
76 * @param self The callback object.
77 * @param mem Memory one can attach to.
78 * @param reg_map A mapping mapping all callee_save/ignore/return registers to their defining nodes.
80 * All nodes which define registers in @p reg_map must keep @p reg_map current.
81 * Also, the @p mem variable must be updated, if memory producing nodes are inserted.
83 void (*epilogue)(void *self, ir_node *bl, ir_node **mem, pmap *reg_map);
87 * Set the flags for a call.
88 * @param call The call.
89 * @param flags Some flags to be set.
90 * @param cb The call callbacks for that call.
91 * @note The ABI phase might change the flags due to analysis.
93 void be_abi_call_set_flags(be_abi_call_t *call, be_abi_call_flags_t flags, const be_abi_callbacks_t *cb);
96 void be_abi_call_param_stack(be_abi_call_t *call, int pos, unsigned alignment, unsigned space_before, unsigned space_after);
97 void be_abi_call_param_reg(be_abi_call_t *call, int pos, const arch_register_t *reg);
98 void be_abi_call_res_reg(be_abi_call_t *call, int pos, const arch_register_t *reg);
101 * Get the flags of a ABI call object.
102 * Note that the flags must not be the same as set by be_abi_call_set_flags(). Analysis may have
103 * altered several flags, so getting them from the call object is always a good idea.
104 * @param call The call object.
107 be_abi_call_flags_t be_abi_call_get_flags(const be_abi_call_t *call);
110 * Get the method type of an ABI call object.
111 * @param call The call object.
112 * @return The method type for that call object.
114 ir_type *be_abi_call_get_method_type(const be_abi_call_t *call);
116 be_abi_irg_t *be_abi_introduce(be_irg_t *bi);
117 void be_abi_fix_stack_bias(be_abi_irg_t *env);
118 void be_abi_fix_stack_nodes(be_abi_irg_t *env);
119 void be_abi_free(be_abi_irg_t *abi);
121 ir_node *be_abi_get_callee_save_irn(be_abi_irg_t *abi, const arch_register_t *reg);
123 #define be_abi_reg_map_get(map, reg) pmap_get((map), (void *) (reg))
124 #define be_abi_reg_map_set(map, reg, irn) pmap_insert((map), (void *) (reg), (irn))