void ssa_cons_start(ir_graph *irg, int n_loc)
{
add_irg_constraints(irg, IR_GRAPH_CONSTRAINT_CONSTRUCTION);
irg_set_nloc(irg, n_loc);
/*
* Note: we could try to reuse existing frag arrays, but it does not
* seems worth to do this. First, we have to check if they really exists and
* then clear them. We do not expect SSA construction is used often.
*/
ir_reserve_resources(irg, IR_RESOURCE_PHI_LIST);
ssa_cons_walker(irg, NULL, prepare_blocks, NULL);
}
static ir_graph *new_r_ir_graph(ir_entity *ent, int n_loc)
{
ir_graph *const res = alloc_graph();
/* Inform statistics here, as blocks will be already built on this graph. */
hook_new_graph(res, ent);
/* graphs are in construction mode by default */
add_irg_constraints(res, IR_GRAPH_CONSTRAINT_CONSTRUCTION);
irg_set_nloc(res, n_loc);
res->irg_pinned_state = op_pin_state_pinned;
res->callee_info_state = irg_callee_info_none;
res->mem_disambig_opt = aa_opt_inherited;
/*-- Type information for the procedure of the graph --*/
res->ent = ent;
if (ent)
set_entity_irg(ent, res);
/*-- a class type so that it can contain "inner" methods as in Pascal. --*/
res->frame_type = new_type_frame();
/* the Anchor node must be created first */
res->anchor = new_r_Anchor(res);
/*-- Nodes needed in every graph --*/
set_irg_end_block(res, new_r_immBlock(res));
set_irg_end(res, new_r_End(res, 0, NULL));
ir_node *const start_block = new_r_Block_noopt(res, 0, NULL);
set_irg_start_block(res, start_block);
set_irg_no_mem(res, new_r_NoMem(res));
res->index = get_irp_new_irg_idx();
#ifdef DEBUG_libfirm
res->graph_nr = get_irp_new_node_nr();
#endif
set_r_cur_block(res, start_block);
return res;
}