all backends have decreasing stack

[libfirm] / ir / be / beirg.h

diff --git a/ir/be/beirg.h b/ir/be/beirg.h
index 3cdb218..dc5f7cb 100644 (file)
--- a/ir/be/beirg.h
+++ b/ir/be/beirg.h
@@ -43,29 +43,65 @@ void be_invalidate_dom_front(ir_graph *irg);
  */
 void be_free_birg(ir_graph *irg);
 
+/** The number of parts of the stack layout. */
+#define N_FRAME_TYPES 3
+
+/**
+ * This type describes the stack layout.
+ * The stack is divided into 3 parts:
+ * - arg_type:     A struct type describing the stack arguments and its order.
+ * - between_type: A struct type describing the stack layout between arguments
+ *                 and frame type. In architectures that put the return address
+ *                 automatically on the stack, the return address is put here.
+ * - frame_type:   A class type describing the frame layout.
+ */
+struct be_stack_layout_t {
+       ir_type *arg_type;             /**< A type describing the stack argument layout. */
+       ir_type *between_type;         /**< A type describing the "between" layout. */
+       ir_type *frame_type;           /**< The frame type. */
+
+       ir_type *order[N_FRAME_TYPES]; /**< arg, between and frame types ordered. */
+
+       ir_entity **param_map;         /**< An array mapping type parameters to arg_type entries */
+       int initial_offset;            /**< the initial difference between stack pointer and frame pointer */
+       int initial_bias;              /**< the initial stack bias */
+       bool sp_relative : 1;          /**< entities are addressed relative to
+                                           stack pointer (omit-fp mode) */
+};
+
 /**
  * An ir_graph with additional analysis data about this irg. Also includes some
  * backend structures
  */
-struct be_irg_t {
-       ir_graph               *irg;
-       be_main_env_t          *main_env;
-       be_abi_irg_t           *abi;
-       arch_code_generator_t  *cg;
-       ir_exec_freq           *exec_freq;
-       be_dom_front_info_t    *dom_front;
-       be_lv_t                *lv;
-       struct obstack          obst; /**< birg obstack (mainly used to keep
-                                          register constraints which we can't keep
-                                          in the irg obst, because it gets replace
-                                          during code selection) */
-};
+typedef struct be_irg_t {
+       ir_graph              *irg;
+       be_main_env_t         *main_env;
+       be_abi_irg_t          *abi;
+       ir_exec_freq          *exec_freq;
+       be_dom_front_info_t   *dom_front;
+       be_lv_t               *lv;
+       be_stack_layout_t      stack_layout;
+       unsigned              *allocatable_regs; /**< registers available for the
+                                                                                             allocator */
+       arch_register_req_t   *sp_req; /**< requirements for stackpointer producing
+                                           nodes. */
+       struct obstack         obst; /**< birg obstack (mainly used to keep
+                                         register constraints which we can't keep
+                                         in the irg obst, because it gets replaced
+                                         during code selection) */
+       void                  *isa_link; /**< architecture specific per-graph data*/
+} be_irg_t;
 
 static inline be_irg_t *be_birg_from_irg(const ir_graph *irg)
 {
        return (be_irg_t*) irg->be_data;
 }
 
+static inline be_main_env_t *be_get_irg_main_env(const ir_graph *irg)
+{
+       return be_birg_from_irg(irg)->main_env;
+}
+
 static inline be_lv_t *be_get_irg_liveness(const ir_graph *irg)
 {
        return be_birg_from_irg(irg)->lv;
@@ -86,14 +122,14 @@ static inline be_abi_irg_t *be_get_irg_abi(const ir_graph *irg)
        return be_birg_from_irg(irg)->abi;
 }
 
-static inline be_options_t *be_get_irg_options(const ir_graph *irg)
+static inline void be_set_irg_abi(ir_graph *irg, be_abi_irg_t *abi)
 {
-       return be_birg_from_irg(irg)->main_env->options;
+       be_birg_from_irg(irg)->abi = abi;
 }
 
-static inline arch_code_generator_t *be_get_irg_cg(const ir_graph *irg)
+static inline be_options_t *be_get_irg_options(const ir_graph *irg)
 {
-       return be_birg_from_irg(irg)->cg;
+       return be_birg_from_irg(irg)->main_env->options;
 }
 
 /** deprecated */
@@ -107,10 +143,15 @@ static inline const arch_env_t *be_get_irg_arch_env(const ir_graph *irg)
        return be_birg_from_irg(irg)->main_env->arch_env;
 }
 
-static inline struct obstack *be_get_birg_obst(const ir_graph *irg)
+static inline struct obstack *be_get_be_obst(const ir_graph *irg)
 {
        be_irg_t *birg = be_birg_from_irg(irg);
        return &birg->obst;
 }
 
-#endif /* FIRM_BE_BEIRG_H */
+static inline be_stack_layout_t *be_get_irg_stack_layout(const ir_graph *irg)
+{
+       return &be_birg_from_irg(irg)->stack_layout;
+}
+
+#endif