C++ (Cpp) DF_INSN_INFO_GET Examples

Example #1

File: fwprop.c Project: ollie314/gcc

/* Check if all uses in DEF_INSN can be used in TARGET_INSN.  This
   would require full computation of available expressions;
   we check only restricted conditions, see use_killed_between.  */
static bool
all_uses_available_at (rtx_insn *def_insn, rtx_insn *target_insn)
{
  df_ref use;
  struct df_insn_info *insn_info = DF_INSN_INFO_GET (def_insn);
  rtx def_set = single_set (def_insn);
  rtx_insn *next;

  gcc_assert (def_set);

  /* If target_insn comes right after def_insn, which is very common
     for addresses, we can use a quicker test.  Ignore debug insns
     other than target insns for this.  */
  next = NEXT_INSN (def_insn);
  while (next && next != target_insn && DEBUG_INSN_P (next))
    next = NEXT_INSN (next);
  if (next == target_insn && REG_P (SET_DEST (def_set)))
    {
      rtx def_reg = SET_DEST (def_set);

      /* If the insn uses the reg that it defines, the substitution is
         invalid.  */
      FOR_EACH_INSN_INFO_USE (use, insn_info)
	if (rtx_equal_p (DF_REF_REG (use), def_reg))
	  return false;
      FOR_EACH_INSN_INFO_EQ_USE (use, insn_info)
	if (rtx_equal_p (DF_REF_REG (use), def_reg))
	  return false;
    }

Example #2

File: web.c Project: CookieChen/gcc

static void
union_match_dups (rtx insn, struct web_entry *def_entry,
		  struct web_entry *use_entry,
		  bool (*fun) (struct web_entry *, struct web_entry *))
{
  struct df_insn_info *insn_info = DF_INSN_INFO_GET (insn);
  df_ref use_link = DF_INSN_INFO_USES (insn_info);
  df_ref def_link = DF_INSN_INFO_DEFS (insn_info);
  struct web_entry *dup_entry;
  int i;

  extract_insn (insn);

  for (i = 0; i < recog_data.n_dups; i++)
    {
      int op = recog_data.dup_num[i];
      enum op_type type = recog_data.operand_type[op];
      df_ref ref, dupref;
      struct web_entry *entry;

      dup_entry = use_entry;
      for (dupref = use_link; dupref; dupref = DF_REF_NEXT_LOC (dupref))
	if (DF_REF_LOC (dupref) == recog_data.dup_loc[i])
	  break;

      if (dupref == NULL && type == OP_INOUT)
	{
	  dup_entry = def_entry;
	  for (dupref = def_link; dupref; dupref = DF_REF_NEXT_LOC (dupref))
	    if (DF_REF_LOC (dupref) == recog_data.dup_loc[i])
	      break;
	}
      /* ??? *DUPREF can still be zero, because when an operand matches
	 a memory, DF_REF_LOC (use_link[n]) points to the register part
	 of the address, whereas recog_data.dup_loc[m] points to the
	 entire memory ref, thus we fail to find the duplicate entry,
         even though it is there.
         Example: i686-pc-linux-gnu gcc.c-torture/compile/950607-1.c
		  -O3 -fomit-frame-pointer -funroll-loops  */
      if (dupref == NULL
	  || DF_REF_REGNO (dupref) < FIRST_PSEUDO_REGISTER)
	continue;

      ref = type == OP_IN ? use_link : def_link;
      entry = type == OP_IN ? use_entry : def_entry;
      for (; ref; ref = DF_REF_NEXT_LOC (ref))
	{
	  rtx *l = DF_REF_LOC (ref);
	  if (l == recog_data.operand_loc[op])
	    break;
	  if (l && DF_REF_REAL_LOC (ref) == recog_data.operand_loc[op])
	    break;
	}

      if (!ref && type == OP_INOUT)
	{
	  entry = use_entry;
	  for (ref = use_link; ref; ref = DF_REF_NEXT_LOC (ref))
	    {
	      rtx *l = DF_REF_LOC (ref);
	      if (l == recog_data.operand_loc[op])
		break;
	      if (l && DF_REF_REAL_LOC (ref) == recog_data.operand_loc[op])
		break;
	    }
	}

      gcc_assert (ref);
      (*fun) (dup_entry + DF_REF_ID (dupref), entry + DF_REF_ID (ref));
    }
}