nsz Git - libfirm/blob - ir/be/beinsn.c

   1
   2 #include "irgraph_t.h"
   3 #include "irmode_t.h"
   4 #include "irnode_t.h"
   5
   6 #include "besched_t.h"
   7 #include "beinsn_t.h"
   8 #include "beabi.h"
   9
  10 be_insn_t *be_scan_insn(const be_insn_env_t *env, ir_node *irn)
  11 {
  12         const arch_env_t *arch_env = env->aenv;
  13         struct obstack *obst       = env->obst;
  14         be_operand_t o;
  15         be_insn_t *insn;
  16         int i, n;
  17         int pre_colored = 0;
  18
  19         insn = obstack_alloc(obst, sizeof(insn[0]));
  20         memset(insn, 0, sizeof(insn[0]));
  21
  22         insn->irn       = irn;
  23         insn->next_insn = sched_next(irn);
  24         if(get_irn_mode(irn) == mode_T) {
  25                 ir_node *p;
  26
  27                 for(p = sched_next(irn); is_Proj(p); p = sched_next(p)) {
  28                         if(arch_irn_consider_in_reg_alloc(arch_env, env->cls, p)) {
  29                                 arch_get_register_req(arch_env, &o.req, p, -1);
  30                                 o.carrier         = p;
  31                                 o.irn             = irn;
  32                                 o.pos             = -(get_Proj_proj(p) + 1);
  33                                 o.partner         = NULL;
  34                                 o.has_constraints = arch_register_req_is(&o.req, limited);
  35                                 obstack_grow(obst, &o, sizeof(o));
  36                                 insn->n_ops++;
  37                                 insn->out_constraints |= o.has_constraints;
  38                                 pre_colored += arch_get_irn_register(arch_env, p) != NULL;
  39                         }
  40                 }
  41
  42                 insn->next_insn = p;
  43         }
  44
  45         else if(arch_irn_consider_in_reg_alloc(arch_env, env->cls, irn)) {
  46                 arch_get_register_req(arch_env, &o.req, irn, -1);
  47                 o.carrier = irn;
  48                 o.irn     = irn;
  49                 o.pos     = -1;
  50                 o.partner = NULL;
  51                 o.has_constraints = arch_register_req_is(&o.req, limited);
  52                 obstack_grow(obst, &o, sizeof(o));
  53                 insn->n_ops++;
  54                 insn->out_constraints |= o.has_constraints;
  55                 pre_colored += arch_get_irn_register(arch_env, irn) != NULL;
  56         }
  57
  58         insn->pre_colored = pre_colored == insn->n_ops && insn->n_ops > 0;
  59         insn->use_start   = insn->n_ops;
  60
  61         for(i = 0, n = get_irn_arity(irn); i < n; ++i) {
  62                 ir_node *op = get_irn_n(irn, i);
  63
  64                 if(arch_irn_consider_in_reg_alloc(arch_env, env->cls, op)) {
  65                         arch_get_register_req(arch_env, &o.req, irn, i);
  66                         o.carrier = op;
  67                         o.irn     = irn;
  68                         o.pos     = i;
  69                         o.partner = NULL;
  70                         o.has_constraints = arch_register_req_is(&o.req, limited);
  71                         obstack_grow(obst, &o, sizeof(o));
  72                         insn->n_ops++;
  73                         insn->in_constraints |= o.has_constraints;
  74                 }
  75         }
  76
  77         insn->has_constraints = insn->in_constraints | insn->out_constraints;
  78         insn->ops = obstack_finish(obst);
  79
  80         /* Compute the admissible registers bitsets. */
  81         for(i = 0; i < insn->n_ops; ++i) {
  82                 be_operand_t *op = &insn->ops[i];
  83
  84                 assert(op->req.cls == env->cls);
  85                 op->regs = bitset_obstack_alloc(obst, env->cls->n_regs);
  86
  87                 if(arch_register_req_is(&op->req, limited))
  88                         op->req.limited(op->req.limited_env, op->regs);
  89                 else {
  90                         arch_put_non_ignore_regs(arch_env, env->cls, op->regs);
  91                         if(env->ignore_colors)
  92                                 bitset_andnot(op->regs, env->ignore_colors);
  93                 }
  94
  95         }
  96
  97         return insn;
  98 }
  99
 100 be_insn_env_t *be_insn_env_init(be_insn_env_t *ie, be_irg_t *birg, const arch_register_class_t *cls, struct obstack *obst)
 101 {
 102         ie->aenv = birg->main_env->arch_env;
 103         ie->cls  = cls;
 104         ie->obst = obst;
 105         be_abi_put_ignore_regs(birg->abi, cls, ie->ignore_colors);
 106         return ie;
 107 }