gcc-8.3/gcc/make_vector_type()

参照元†

gcc-8.3/gcc/build_vector_type()

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説明†

パス: gcc-8.3/gcc/tree.c

FIXME: これは何？
- 説明

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引数†

tree innertype
- gcc-8.3/gcc/tree
poly_int64 nunits
- gcc-8.3/gcc/poly_int64
machine_mode mode
- gcc-8.3/gcc/machine_mode

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返り値†

tree

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参考†

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実装†

/* Create a new vector type node holding NUNITS units of type INNERTYPE,
   and mapped to the machine mode MODE.  Initialize its fields and build
   the information necessary for debugging output.  */

static tree
make_vector_type (tree innertype, poly_int64 nunits, machine_mode mode)
{
  tree t;
  tree mv_innertype = TYPE_MAIN_VARIANT (innertype);

- gcc-8.3/gcc/TYPE_MAIN_VARIANT()

  t = make_node (VECTOR_TYPE);
  TREE_TYPE (t) = mv_innertype;
  SET_TYPE_VECTOR_SUBPARTS (t, nunits);
  SET_TYPE_MODE (t, mode);

  if (TYPE_STRUCTURAL_EQUALITY_P (mv_innertype) || in_lto_p)
    SET_TYPE_STRUCTURAL_EQUALITY (t);
  else if ((TYPE_CANONICAL (mv_innertype) != innertype
	    || mode != VOIDmode)
	   && !VECTOR_BOOLEAN_TYPE_P (t))
    TYPE_CANONICAL (t)
      = make_vector_type (TYPE_CANONICAL (mv_innertype), nunits, VOIDmode);

  layout_type (t);

  hashval_t hash = type_hash_canon_hash (t);
  t = type_hash_canon (hash, t);

  /* We have built a main variant, based on the main variant of the
     inner type. Use it to build the variant we return.  */
  if ((TYPE_ATTRIBUTES (innertype) || TYPE_QUALS (innertype))
      && TREE_TYPE (t) != innertype)
    return build_type_attribute_qual_variant (t,
					      TYPE_ATTRIBUTES (innertype),
					      TYPE_QUALS (innertype));

  return t;
}

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