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/* Supporting functions for resolving DATA statement.
   Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
   Free Software Foundation, Inc.
   Contributed by Lifang Zeng <zlf605@hotmail.com>
 
This file is part of GCC.
 
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.
 
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.
 
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.  */
 
 
/* Notes for DATA statement implementation:
 
   We first assign initial value to each symbol by gfc_assign_data_value
   during resolving DATA statement. Refer to check_data_variable and
   traverse_data_list in resolve.c.
 
   The complexity exists in the handling of array section, implied do
   and array of struct appeared in DATA statement.
 
   We call gfc_conv_structure, gfc_con_array_array_initializer,
   etc., to convert the initial value. Refer to trans-expr.c and
   trans-array.c.  */
 
#include "config.h"
#include "gfortran.h"
#include "data.h"
 
static void formalize_init_expr (gfc_expr *);
 
/* Calculate the array element offset.  */
 
static void
get_array_index (gfc_array_ref *ar, mpz_t *offset)
{
  gfc_expr *e;
  int i;
  mpz_t delta;
  mpz_t tmp;
 
  mpz_init (tmp);
  mpz_set_si (*offset, 0);
  mpz_init_set_si (delta, 1);
  for (i = 0; i < ar->dimen; i++)
    {
      e = gfc_copy_expr (ar->start[i]);
      gfc_simplify_expr (e, 1);
 
      if ((gfc_is_constant_expr (ar->as->lower[i]) == 0)
          || (gfc_is_constant_expr (ar->as->upper[i]) == 0)
          || (gfc_is_constant_expr (e) == 0))
        gfc_error ("non-constant array in DATA statement %L", &ar->where);
 
      mpz_set (tmp, e->value.integer);
      mpz_sub (tmp, tmp, ar->as->lower[i]->value.integer);
      mpz_mul (tmp, tmp, delta);
      mpz_add (*offset, tmp, *offset);
 
      mpz_sub (tmp, ar->as->upper[i]->value.integer,
               ar->as->lower[i]->value.integer);
      mpz_add_ui (tmp, tmp, 1);
      mpz_mul (delta, tmp, delta);
    }
  mpz_clear (delta);
  mpz_clear (tmp);
}
 
 
/* Find if there is a constructor which offset is equal to OFFSET.  */
 
static gfc_constructor *
find_con_by_offset (splay_tree spt, mpz_t offset)
{
  mpz_t tmp;
  gfc_constructor *ret = NULL;
  gfc_constructor *con;
  splay_tree_node sptn;
 
  /* The complexity is due to needing quick access to the linked list of
     constructors.  Both a linked list and a splay tree are used, and both
     are kept up to date if they are array elements (which is the only time
     that a specific constructor has to be found).  */
 
  gcc_assert (spt != NULL);
  mpz_init (tmp);
 
  sptn = splay_tree_lookup (spt, (splay_tree_key) mpz_get_si (offset));
 
  if (sptn)
    ret = (gfc_constructor*) sptn->value;
  else
    {
       /* Need to check and see if we match a range, so we will pull
          the next lowest index and see if the range matches.  */
       sptn = splay_tree_predecessor (spt,
                                      (splay_tree_key) mpz_get_si (offset));
       if (sptn)
         {
            con = (gfc_constructor*) sptn->value;
            if (mpz_cmp_ui (con->repeat, 1) > 0)
              {
                 mpz_init (tmp);
                 mpz_add (tmp, con->n.offset, con->repeat);
                 if (mpz_cmp (offset, tmp) < 0)
                   ret = con;
                 mpz_clear (tmp);
              }
            else
              ret = NULL; /* The range did not match.  */
         }
      else
        ret = NULL; /* No pred, so no match.  */
    }
 
  return ret;
}
 
 
/* Find if there is a constructor which component is equal to COM.  */
 
static gfc_constructor *
find_con_by_component (gfc_component *com, gfc_constructor *con)
{
  for (; con; con = con->next)
    {
      if (com == con->n.component)
        return con;
    }
  return NULL;
}
 
 
/* Create a character type initialization expression from RVALUE.
   TS [and REF] describe [the substring of] the variable being initialized.
   INIT is the existing initializer, not NULL.  Initialization is performed
   according to normal assignment rules.  */
 
static gfc_expr *
create_character_intializer (gfc_expr *init, gfc_typespec *ts,
                             gfc_ref *ref, gfc_expr *rvalue)
{
  int len, start, end;
  gfc_char_t *dest;
 
  gfc_extract_int (ts->u.cl->length, &len);
 
  if (init == NULL)
    {
      /* Create a new initializer.  */
      init = gfc_get_expr ();
      init->expr_type = EXPR_CONSTANT;
      init->ts = *ts;
 
      dest = gfc_get_wide_string (len + 1);
      dest[len] = '\0';
      init->value.character.length = len;
      init->value.character.string = dest;
      /* Blank the string if we're only setting a substring.  */
      if (ref != NULL)
        gfc_wide_memset (dest, ' ', len);
    }
  else
    dest = init->value.character.string;
 
  if (ref)
    {
      gfc_expr *start_expr, *end_expr;
 
      gcc_assert (ref->type == REF_SUBSTRING);
 
      /* Only set a substring of the destination.  Fortran substring bounds
         are one-based [start, end], we want zero based [start, end).  */
      start_expr = gfc_copy_expr (ref->u.ss.start);
      end_expr = gfc_copy_expr (ref->u.ss.end);
 
      if ((gfc_simplify_expr (start_expr, 1) == FAILURE)
          || (gfc_simplify_expr (end_expr, 1)) == FAILURE)
        {
          gfc_error ("failure to simplify substring reference in DATA "
                     "statement at %L", &ref->u.ss.start->where);
          return NULL;
        }
 
      gfc_extract_int (start_expr, &start);
      start--;
      gfc_extract_int (end_expr, &end);
    }
  else
    {
      /* Set the whole string.  */
      start = 0;
      end = len;
    }
 
  /* Copy the initial value.  */
  if (rvalue->ts.type == BT_HOLLERITH)
    len = rvalue->representation.length;
  else
    len = rvalue->value.character.length;
 
  if (len > end - start)
    {
      len = end - start;
      gfc_warning_now ("initialization string truncated to match variable "
                       "at %L", &rvalue->where);
    }
 
  if (rvalue->ts.type == BT_HOLLERITH)
    {
      int i;
      for (i = 0; i < len; i++)
        dest[start+i] = rvalue->representation.string[i];
    }
  else
    memcpy (&dest[start], rvalue->value.character.string,
            len * sizeof (gfc_char_t));
 
  /* Pad with spaces.  Substrings will already be blanked.  */
  if (len < end - start && ref == NULL)
    gfc_wide_memset (&dest[start + len], ' ', end - (start + len));
 
  if (rvalue->ts.type == BT_HOLLERITH)
    {
      init->representation.length = init->value.character.length;
      init->representation.string
        = gfc_widechar_to_char (init->value.character.string,
                                init->value.character.length);
    }
 
  return init;
}
 
 
/* Assign the initial value RVALUE to  LVALUE's symbol->value. If the
   LVALUE already has an initialization, we extend this, otherwise we
   create a new one.  */
 
gfc_try
gfc_assign_data_value (gfc_expr *lvalue, gfc_expr *rvalue, mpz_t index)
{
  gfc_ref *ref;
  gfc_expr *init;
  gfc_expr *expr;
  gfc_constructor *con;
  gfc_constructor *last_con;
  gfc_constructor *pred;
  gfc_symbol *symbol;
  gfc_typespec *last_ts;
  mpz_t offset;
  splay_tree spt;
  splay_tree_node sptn;
 
  symbol = lvalue->symtree->n.sym;
  init = symbol->value;
  last_ts = &symbol->ts;
  last_con = NULL;
  mpz_init_set_si (offset, 0);
 
  /* Find/create the parent expressions for subobject references.  */
  for (ref = lvalue->ref; ref; ref = ref->next)
    {
      /* Break out of the loop if we find a substring.  */
      if (ref->type == REF_SUBSTRING)
        {
          /* A substring should always be the last subobject reference.  */
          gcc_assert (ref->next == NULL);
          break;
        }
 
      /* Use the existing initializer expression if it exists.  Otherwise
         create a new one.  */
      if (init == NULL)
        expr = gfc_get_expr ();
      else
        expr = init;
 
      /* Find or create this element.  */
      switch (ref->type)
        {
        case REF_ARRAY:
          if (init && expr->expr_type != EXPR_ARRAY)
            {
              gfc_error ("'%s' at %L already is initialized at %L",
                         lvalue->symtree->n.sym->name, &lvalue->where,
                         &init->where);
              return FAILURE;
            }
 
          if (init == NULL)
            {
              /* The element typespec will be the same as the array
                 typespec.  */
              expr->ts = *last_ts;
              /* Setup the expression to hold the constructor.  */
              expr->expr_type = EXPR_ARRAY;
              expr->rank = ref->u.ar.as->rank;
            }
 
          if (ref->u.ar.type == AR_ELEMENT)
            get_array_index (&ref->u.ar, &offset);
          else
            mpz_set (offset, index);
 
          /* Check the bounds.  */
          if (mpz_cmp_si (offset, 0) < 0)
            {
              gfc_error ("Data element below array lower bound at %L",
                         &lvalue->where);
              return FAILURE;
            }
          else
            {
              mpz_t size;
              if (spec_size (ref->u.ar.as, &size) == SUCCESS)
                {
                  if (mpz_cmp (offset, size) >= 0)
                  {
                    mpz_clear (size);
                    gfc_error ("Data element above array upper bound at %L",
                               &lvalue->where);
                    return FAILURE;
                  }
                  mpz_clear (size);
                }
            }
 
          /* Splay tree containing offset and gfc_constructor.  */
          spt = expr->con_by_offset;
 
          if (spt == NULL)
            {
               spt = splay_tree_new (splay_tree_compare_ints, NULL, NULL);
               expr->con_by_offset = spt;
               con = NULL;
            }
         else
          con = find_con_by_offset (spt, offset);
 
          if (con == NULL)
            {
              splay_tree_key j;
 
              /* Create a new constructor.  */
              con = gfc_get_constructor ();
              mpz_set (con->n.offset, offset);
              j = (splay_tree_key) mpz_get_si (offset);
              sptn = splay_tree_insert (spt, j, (splay_tree_value) con);
              /* Fix up the linked list.  */
              sptn = splay_tree_predecessor (spt, j);
              if (sptn == NULL)
                {  /* Insert at the head.  */
                   con->next = expr->value.constructor;
                   expr->value.constructor = con;
                }
              else
                {  /* Insert in the chain.  */
                   pred = (gfc_constructor*) sptn->value;
                   con->next = pred->next;
                   pred->next = con;
                }
            }
          break;
 
        case REF_COMPONENT:
          if (init == NULL)
            {
              /* Setup the expression to hold the constructor.  */
              expr->expr_type = EXPR_STRUCTURE;
              expr->ts.type = BT_DERIVED;
              expr->ts.u.derived = ref->u.c.sym;
            }
          else
            gcc_assert (expr->expr_type == EXPR_STRUCTURE);
          last_ts = &ref->u.c.component->ts;
 
          /* Find the same element in the existing constructor.  */
          con = expr->value.constructor;
          con = find_con_by_component (ref->u.c.component, con);
 
          if (con == NULL)
            {
              /* Create a new constructor.  */
              con = gfc_get_constructor ();
              con->n.component = ref->u.c.component;
              con->next = expr->value.constructor;
              expr->value.constructor = con;
            }
          break;
 
        default:
          gcc_unreachable ();
        }
 
      if (init == NULL)
        {
          /* Point the container at the new expression.  */
          if (last_con == NULL)
            symbol->value = expr;
          else
            last_con->expr = expr;
        }
      init = con->expr;
      last_con = con;
    }
 
  if (ref || last_ts->type == BT_CHARACTER)
    {
      if (lvalue->ts.u.cl->length == NULL && !(ref && ref->u.ss.length != NULL))
        return FAILURE;
      expr = create_character_intializer (init, last_ts, ref, rvalue);
    }
  else
    {
      /* Overwriting an existing initializer is non-standard but usually only
         provokes a warning from other compilers.  */
      if (init != NULL)
        {
          /* Order in which the expressions arrive here depends on whether
             they are from data statements or F95 style declarations.
             Therefore, check which is the most recent.  */
          expr = (LOCATION_LINE (init->where.lb->location)
                  > LOCATION_LINE (rvalue->where.lb->location))
               ? init : rvalue;
          gfc_notify_std (GFC_STD_GNU, "Extension: re-initialization "
                          "of '%s' at %L", symbol->name, &expr->where);
        }
 
      expr = gfc_copy_expr (rvalue);
      if (!gfc_compare_types (&lvalue->ts, &expr->ts))
        gfc_convert_type (expr, &lvalue->ts, 0);
    }
 
  if (last_con == NULL)
    symbol->value = expr;
  else
    last_con->expr = expr;
 
  return SUCCESS;
}
 
 
/* Similarly, but initialize REPEAT consecutive values in LVALUE the same
   value in RVALUE.  For the nonce, LVALUE must refer to a full array, not
   an array section.  */
 
void
gfc_assign_data_value_range (gfc_expr *lvalue, gfc_expr *rvalue,
                             mpz_t index, mpz_t repeat)
{
  gfc_ref *ref;
  gfc_expr *init, *expr;
  gfc_constructor *con, *last_con;
  gfc_constructor *pred;
  gfc_symbol *symbol;
  gfc_typespec *last_ts;
  mpz_t offset;
  splay_tree spt;
  splay_tree_node sptn;
 
  symbol = lvalue->symtree->n.sym;
  init = symbol->value;
  last_ts = &symbol->ts;
  last_con = NULL;
  mpz_init_set_si (offset, 0);
 
  /* Find/create the parent expressions for subobject references.  */
  for (ref = lvalue->ref; ref; ref = ref->next)
    {
      /* Use the existing initializer expression if it exists.
         Otherwise create a new one.  */
      if (init == NULL)
        expr = gfc_get_expr ();
      else
        expr = init;
 
      /* Find or create this element.  */
      switch (ref->type)
        {
        case REF_ARRAY:
          if (init == NULL)
            {
              /* The element typespec will be the same as the array
                 typespec.  */
              expr->ts = *last_ts;
              /* Setup the expression to hold the constructor.  */
              expr->expr_type = EXPR_ARRAY;
              expr->rank = ref->u.ar.as->rank;
            }
          else
            gcc_assert (expr->expr_type == EXPR_ARRAY);
 
          if (ref->u.ar.type == AR_ELEMENT)
            {
              get_array_index (&ref->u.ar, &offset);
 
              /* This had better not be the bottom of the reference.
                 We can still get to a full array via a component.  */
              gcc_assert (ref->next != NULL);
            }
          else
            {
              mpz_set (offset, index);
 
              /* We're at a full array or an array section.  This means
                 that we've better have found a full array, and that we're
                 at the bottom of the reference.  */
              gcc_assert (ref->u.ar.type == AR_FULL);
              gcc_assert (ref->next == NULL);
            }
 
          /* Find the same element in the existing constructor.  */
 
          /* Splay tree containing offset and gfc_constructor.  */
          spt = expr->con_by_offset;
 
          if (spt == NULL)
            {
               spt = splay_tree_new (splay_tree_compare_ints, NULL, NULL);
               expr->con_by_offset = spt;
               con = NULL;
            }
          else
            con = find_con_by_offset (spt, offset);
 
          if (con == NULL)
            {
              splay_tree_key j;
              /* Create a new constructor.  */
              con = gfc_get_constructor ();
              mpz_set (con->n.offset, offset);
              j = (splay_tree_key) mpz_get_si (offset);
 
              if (ref->next == NULL)
                mpz_set (con->repeat, repeat);
              sptn = splay_tree_insert (spt, j, (splay_tree_value) con);
              /* Fix up the linked list.  */
              sptn = splay_tree_predecessor (spt, j);
              if (sptn == NULL)
                {  /* Insert at the head.  */
                   con->next = expr->value.constructor;
                   expr->value.constructor = con;
                }
              else
                {  /* Insert in the chain.  */
                   pred = (gfc_constructor*) sptn->value;
                   con->next = pred->next;
                   pred->next = con;
                }
            }
          else
            gcc_assert (ref->next != NULL);
          break;
 
        case REF_COMPONENT:
          if (init == NULL)
            {
              /* Setup the expression to hold the constructor.  */
              expr->expr_type = EXPR_STRUCTURE;
              expr->ts.type = BT_DERIVED;
              expr->ts.u.derived = ref->u.c.sym;
            }
          else
            gcc_assert (expr->expr_type == EXPR_STRUCTURE);
          last_ts = &ref->u.c.component->ts;
 
          /* Find the same element in the existing constructor.  */
          con = expr->value.constructor;
          con = find_con_by_component (ref->u.c.component, con);
 
          if (con == NULL)
            {
              /* Create a new constructor.  */
              con = gfc_get_constructor ();
              con->n.component = ref->u.c.component;
              con->next = expr->value.constructor;
              expr->value.constructor = con;
            }
 
          /* Since we're only intending to initialize arrays here,
             there better be an inner reference.  */
          gcc_assert (ref->next != NULL);
          break;
 
        case REF_SUBSTRING:
        default:
          gcc_unreachable ();
        }
 
      if (init == NULL)
        {
          /* Point the container at the new expression.  */
          if (last_con == NULL)
            symbol->value = expr;
          else
            last_con->expr = expr;
        }
      init = con->expr;
      last_con = con;
    }
 
  if (last_ts->type == BT_CHARACTER)
    expr = create_character_intializer (init, last_ts, NULL, rvalue);
  else
    {
      /* We should never be overwriting an existing initializer.  */
      gcc_assert (!init);
 
      expr = gfc_copy_expr (rvalue);
      if (!gfc_compare_types (&lvalue->ts, &expr->ts))
        gfc_convert_type (expr, &lvalue->ts, 0);
    }
 
  if (last_con == NULL)
    symbol->value = expr;
  else
    last_con->expr = expr;
}
 
/* Modify the index of array section and re-calculate the array offset.  */
 
void
gfc_advance_section (mpz_t *section_index, gfc_array_ref *ar,
                     mpz_t *offset_ret)
{
  int i;
  mpz_t delta;
  mpz_t tmp;
  bool forwards;
  int cmp;
 
  for (i = 0; i < ar->dimen; i++)
    {
      if (ar->dimen_type[i] != DIMEN_RANGE)
        continue;
 
      if (ar->stride[i])
        {
          mpz_add (section_index[i], section_index[i],
                   ar->stride[i]->value.integer);
        if (mpz_cmp_si (ar->stride[i]->value.integer, 0) >= 0)
          forwards = true;
        else
          forwards = false;
        }
      else
        {
          mpz_add_ui (section_index[i], section_index[i], 1);
          forwards = true;
        }
 
      if (ar->end[i])
        cmp = mpz_cmp (section_index[i], ar->end[i]->value.integer);
      else
        cmp = mpz_cmp (section_index[i], ar->as->upper[i]->value.integer);
 
      if ((cmp > 0 && forwards) || (cmp < 0 && !forwards))
        {
          /* Reset index to start, then loop to advance the next index.  */
          if (ar->start[i])
            mpz_set (section_index[i], ar->start[i]->value.integer);
          else
            mpz_set (section_index[i], ar->as->lower[i]->value.integer);
        }
      else
        break;
    }
 
  mpz_set_si (*offset_ret, 0);
  mpz_init_set_si (delta, 1);
  mpz_init (tmp);
  for (i = 0; i < ar->dimen; i++)
    {
      mpz_sub (tmp, section_index[i], ar->as->lower[i]->value.integer);
      mpz_mul (tmp, tmp, delta);
      mpz_add (*offset_ret, tmp, *offset_ret);
 
      mpz_sub (tmp, ar->as->upper[i]->value.integer,
               ar->as->lower[i]->value.integer);
      mpz_add_ui (tmp, tmp, 1);
      mpz_mul (delta, tmp, delta);
    }
  mpz_clear (tmp);
  mpz_clear (delta);
}
 
 
/* Rearrange a structure constructor so the elements are in the specified
   order.  Also insert NULL entries if necessary.  */
 
static void
formalize_structure_cons (gfc_expr *expr)
{
  gfc_constructor *head;
  gfc_constructor *tail;
  gfc_constructor *cur;
  gfc_constructor *last;
  gfc_constructor *c;
  gfc_component *order;
 
  c = expr->value.constructor;
 
  /* Constructor is already formalized.  */
  if (!c || c->n.component == NULL)
    return;
 
  head = tail = NULL;
  for (order = expr->ts.u.derived->components; order; order = order->next)
    {
      /* Find the next component.  */
      last = NULL;
      cur = c;
      while (cur != NULL && cur->n.component != order)
        {
          last = cur;
          cur = cur->next;
        }
 
      if (cur == NULL)
        {
          /* Create a new one.  */
          cur = gfc_get_constructor ();
        }
      else
        {
          /* Remove it from the chain.  */
          if (last == NULL)
            c = cur->next;
          else
            last->next = cur->next;
          cur->next = NULL;
 
          formalize_init_expr (cur->expr);
        }
 
      /* Add it to the new constructor.  */
      if (head == NULL)
        head = tail = cur;
      else
        {
          tail->next = cur;
          tail = tail->next;
        }
    }
  gcc_assert (c == NULL);
  expr->value.constructor = head;
}
 
 
/* Make sure an initialization expression is in normalized form, i.e., all
   elements of the constructors are in the correct order.  */
 
static void
formalize_init_expr (gfc_expr *expr)
{
  expr_t type;
  gfc_constructor *c;
 
  if (expr == NULL)
    return;
 
  type = expr->expr_type;
  switch (type)
    {
    case EXPR_ARRAY:
      c = expr->value.constructor;
      while (c)
        {
          formalize_init_expr (c->expr);
          c = c->next;
        }
      break;
 
    case EXPR_STRUCTURE:
      formalize_structure_cons (expr);
      break;
 
    default:
      break;
    }
}
 
 
/* Resolve symbol's initial value after all data statement.  */
 
void
gfc_formalize_init_value (gfc_symbol *sym)
{
  formalize_init_expr (sym->value);
}
 
 
/* Get the integer value into RET_AS and SECTION from AS and AR, and return
   offset.  */
 
void
gfc_get_section_index (gfc_array_ref *ar, mpz_t *section_index, mpz_t *offset)
{
  int i;
  mpz_t delta;
  mpz_t tmp;
 
  mpz_set_si (*offset, 0);
  mpz_init (tmp);
  mpz_init_set_si (delta, 1);
  for (i = 0; i < ar->dimen; i++)
    {
      mpz_init (section_index[i]);
      switch (ar->dimen_type[i])
        {
        case DIMEN_ELEMENT:
        case DIMEN_RANGE:
          if (ar->start[i])
            {
              mpz_sub (tmp, ar->start[i]->value.integer,
                       ar->as->lower[i]->value.integer);
              mpz_mul (tmp, tmp, delta);
              mpz_add (*offset, tmp, *offset);
              mpz_set (section_index[i], ar->start[i]->value.integer);
            }
          else
              mpz_set (section_index[i], ar->as->lower[i]->value.integer);
          break;
 
        case DIMEN_VECTOR:
          gfc_internal_error ("TODO: Vector sections in data statements");
 
        default:
          gcc_unreachable ();
        }
 
      mpz_sub (tmp, ar->as->upper[i]->value.integer,
               ar->as->lower[i]->value.integer);
      mpz_add_ui (tmp, tmp, 1);
      mpz_mul (delta, tmp, delta);
    }
 
  mpz_clear (tmp);
  mpz_clear (delta);
}
 
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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [fortran/] [data.c] - Blame information for rev 328

Line No.	Rev	Author	Line
1	285	jeremybenn	`/* Supporting functions for resolving DATA statement.`
2			`Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009`
3			`Free Software Foundation, Inc.`
4			`Contributed by Lifang Zeng <zlf605@hotmail.com>`
5
6			`This file is part of GCC.`
7
8			`GCC is free software; you can redistribute it and/or modify it under`
9			`the terms of the GNU General Public License as published by the Free`
10			`Software Foundation; either version 3, or (at your option) any later`
11			`version.`
12
13			`GCC is distributed in the hope that it will be useful, but WITHOUT ANY`
14			`WARRANTY; without even the implied warranty of MERCHANTABILITY or`
15			`FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License`
16			`for more details.`
17
18			`You should have received a copy of the GNU General Public License`
19			`along with GCC; see the file COPYING3. If not see`
20			`<http://www.gnu.org/licenses/>. */`
21
22
23			`/* Notes for DATA statement implementation:`
24
25			`We first assign initial value to each symbol by gfc_assign_data_value`
26			`during resolving DATA statement. Refer to check_data_variable and`
27			`traverse_data_list in resolve.c.`
28
29			`The complexity exists in the handling of array section, implied do`
30			`and array of struct appeared in DATA statement.`
31
32			`We call gfc_conv_structure, gfc_con_array_array_initializer,`
33			`etc., to convert the initial value. Refer to trans-expr.c and`
34			`trans-array.c. */`
35
36			`#include "config.h"`
37			`#include "gfortran.h"`
38			`#include "data.h"`
39
40			`static void formalize_init_expr (gfc_expr *);`