* @param args the stack argument layout type
* @param between the between layout type
* @param locals the method frame type
- * @param stack_dir the stack direction
+ * @param stack_dir the stack direction: < 0 decreasing, > 0 increasing addresses
* @param param_map an array mapping method argument positions to the stack argument type
*
* @return the initialized stack layout
frame->order[2] = locals;
}
else {
+ /* typical decreasing stack: locals have the
+ * lowest addresses, arguments the highest */
frame->order[0] = locals;
frame->order[2] = args;
}
ir_node *curr_mem = get_Call_mem(irn);
ir_node *bl = get_nodes_block(irn);
int stack_size = 0;
- int stack_dir = arch_env_stack_dir(arch_env);
- const arch_register_t *sp = arch_env_sp(arch_env);
+ int stack_dir = arch_env->stack_dir;
+ const arch_register_t *sp = arch_env->sp;
be_abi_call_t *call = be_abi_call_new(sp->reg_class);
ir_mode *mach_mode = sp->reg_class->mode;
struct obstack *obst = &env->obst;
};
typedef struct lower_frame_sels_env_t {
- ent_pos_pair *value_param_list; /**< the list of all value param entities */
- ir_node *frame; /**< the current frame */
- const arch_register_class_t *sp_class; /**< register class of the stack pointer */
- ir_type *value_tp; /**< the value type if any */
- ir_type *frame_tp; /**< the frame type */
+ ent_pos_pair *value_param_list; /**< the list of all value param entities */
+ ir_node *frame; /**< the current frame */
+ const arch_register_class_t *sp_class; /**< register class of the stack pointer */
+ const arch_register_class_t *link_class; /**< register class of the link pointer */
+ ir_type *value_tp; /**< the value type if any */
+ ir_type *frame_tp; /**< the frame type */
+ int static_link_pos; /**< argument number of the hidden static link */
} lower_frame_sels_env_t;
+/**
+ * Return an entity from the backend for an value param entity.
+ *
+ * @param ent an value param type entity
+ * @param ctx context
+ */
+static ir_entity *get_argument_entity(ir_entity *ent, lower_frame_sels_env_t *ctx)
+{
+ ir_entity *argument_ent = get_entity_link(ent);
+
+ if (argument_ent == NULL) {
+ /* we have NO argument entity yet: This is bad, as we will
+ * need one for backing store.
+ * Create one here.
+ */
+ ir_type *frame_tp = ctx->frame_tp;
+ unsigned offset = get_type_size_bytes(frame_tp);
+ ir_type *tp = get_entity_type(ent);
+ unsigned align = get_type_alignment_bytes(tp);
+
+ offset += align - 1;
+ offset &= ~(align - 1);
+
+ argument_ent = copy_entity_own(ent, frame_tp);
+
+ /* must be automatic to set a fixed layout */
+ set_entity_allocation(argument_ent, allocation_automatic);
+ set_entity_offset(argument_ent, offset);
+ offset += get_type_size_bytes(tp);
+
+ set_type_size_bytes(frame_tp, offset);
+ set_entity_link(ent, argument_ent);
+ }
+ return argument_ent;
+}
/**
* Walker: Replaces Sels of frame type and
* value param type entities by FrameAddress.
int pos = 0;
if (get_entity_owner(ent) == ctx->value_tp) {
- ir_entity *argument_ent = get_entity_link(ent);
-
/* replace by its copy from the argument type */
pos = get_struct_member_index(ctx->value_tp, ent);
-
- if (argument_ent == NULL) {
- /* we have NO argument entity yet: This is bad, as we will
- * need one for backing store.
- * Create one here.
- */
- ir_type *frame_tp = ctx->frame_tp;
- unsigned offset = get_type_size_bytes(frame_tp);
- ir_type *tp = get_entity_type(ent);
- unsigned align = get_type_alignment_bytes(tp);
-
- offset += align - 1;
- offset &= ~(align - 1);
-
- argument_ent = copy_entity_own(ent, frame_tp);
-
- /* must be automatic to set a fixed layout */
- set_entity_allocation(argument_ent, allocation_automatic);
- set_entity_offset(argument_ent, offset);
- offset += get_type_size_bytes(tp);
-
- set_type_size_bytes(frame_tp, offset);
- set_entity_link(ent, argument_ent);
- }
- ent = argument_ent;
+ ent = get_argument_entity(ent, ctx);
}
nw = be_new_FrameAddr(ctx->sp_class, current_ir_graph, bl, ctx->frame, ent);
panic("Initial exec has no follow block in %+F", irg);
}
+static void lower_outer_frame_sels(ir_node *irn, void *env) {
+ lower_frame_sels_env_t *ctx = env;
+ ir_node *ptr, *bl, *nw;
+ ir_entity *ent;
+ int pos = 0;
+
+ if (! is_Sel(irn))
+ return;
+ ptr = get_Sel_ptr(irn);
+ if (! is_arg_Proj(ptr))
+ return;
+ if (get_Proj_proj(ptr) != ctx->static_link_pos)
+ return;
+ ent = get_Sel_entity(irn);
+
+ if (get_entity_owner(ent) == ctx->value_tp) {
+ /* replace by its copy from the argument type */
+ pos = get_struct_member_index(ctx->value_tp, ent);
+ ent = get_argument_entity(ent, ctx);
+ }
+ bl = get_nodes_block(irn);
+ nw = be_new_FrameAddr(ctx->link_class, current_ir_graph, bl, ptr, ent);
+ exchange(irn, nw);
+
+ /* check, if it's a param sel and if have not seen this entity before */
+ if (get_entity_owner(ent) == ctx->value_tp && get_entity_link(ent) == NULL) {
+ ent_pos_pair pair;
+
+ pair.ent = ent;
+ pair.pos = pos;
+ pair.next = NULL;
+ ARR_APP1(ent_pos_pair, ctx->value_param_list, pair);
+ /* just a mark */
+ set_entity_link(ent, ctx->value_param_list);
+ }
+}
+
+/**
+ * Fix access to outer local variables.
+ */
+static void fix_outer_variable_access(be_abi_irg_t *env, lower_frame_sels_env_t *ctx)
+{
+ int i;
+ ir_graph *irg;
+
+ for (i = get_class_n_members(ctx->frame_tp) - 1; i >= 0; --i) {
+ ir_entity *ent = get_class_member(ctx->frame_tp, i);
+
+ if (! is_method_entity(ent))
+ continue;
+
+ /*
+ * FIXME: find the number of the static link parameter
+ * for now we assume 0 here
+ */
+ ctx->static_link_pos = 0;
+
+ irg = get_entity_irg(ent);
+ irg_walk_graph(irg, NULL, lower_outer_frame_sels, ctx);
+ }
+}
+
/**
* Modify the irg itself and the frame type.
*/
{
be_abi_call_t *call = env->call;
const arch_env_t *arch_env= env->birg->main_env->arch_env;
- const arch_register_t *sp = arch_env_sp(arch_env);
+ const arch_register_t *sp = arch_env->sp;
ir_graph *irg = env->birg->irg;
ir_node *start_bl;
ir_node *end;
ctx.value_param_list = NEW_ARR_F(ent_pos_pair, 0);
ctx.frame = get_irg_frame(irg);
ctx.sp_class = env->arch_env->sp->reg_class;
+ ctx.link_class = env->arch_env->link_class;
ctx.frame_tp = get_irg_frame_type(irg);
/* we will possible add new entities to the frame: set the layout to undefined */
args = obstack_alloc(&env->obst, n_params * sizeof(args[0]));
memset(args, 0, n_params * sizeof(args[0]));
+ /*
+ * for inner function we must now fix access to outer frame entities.
+ */
+ fix_outer_variable_access(env, &ctx);
+
/* Check if a value parameter is transmitted as a register.
* This might happen if the address of an parameter is taken which is
* transmitted in registers.
* a backing store into the first block.
*/
fix_address_of_parameter_access(env, ctx.value_param_list);
+
DEL_ARR_F(ctx.value_param_list);
irp_free_resources(irp, IR_RESOURCE_ENTITY_LINK);
node.
*/
ir_entity *ent = arch_get_frame_entity(irn);
- if (ent) {
+ if (ent != NULL) {
int bias = omit_fp ? real_bias : 0;
int offset = get_stack_entity_offset(&env->frame, ent, bias);
arch_set_frame_offset(irn, offset);
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