--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/fortran/trans-decl.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,6738 @@
+/* Backend function setup
+   Copyright (C) 2002-2017 Free Software Foundation, Inc.
+   Contributed by Paul Brook
+
+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/>.  */
+
+/* trans-decl.c -- Handling of backend function and variable decls, etc */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "target.h"
+#include "function.h"
+#include "tree.h"
+#include "gfortran.h"
+#include "gimple-expr.h"	/* For create_tmp_var_raw.  */
+#include "trans.h"
+#include "stringpool.h"
+#include "cgraph.h"
+#include "fold-const.h"
+#include "stor-layout.h"
+#include "varasm.h"
+#include "attribs.h"
+#include "dumpfile.h"
+#include "toplev.h"	/* For announce_function.  */
+#include "debug.h"
+#include "constructor.h"
+#include "trans-types.h"
+#include "trans-array.h"
+#include "trans-const.h"
+/* Only for gfc_trans_code.  Shouldn't need to include this.  */
+#include "trans-stmt.h"
+#include "gomp-constants.h"
+#include "gimplify.h"
+
+#define MAX_LABEL_VALUE 99999
+
+
+/* Holds the result of the function if no result variable specified.  */
+
+static GTY(()) tree current_fake_result_decl;
+static GTY(()) tree parent_fake_result_decl;
+
+
+/* Holds the variable DECLs for the current function.  */
+
+static GTY(()) tree saved_function_decls;
+static GTY(()) tree saved_parent_function_decls;
+
+static hash_set<tree> *nonlocal_dummy_decl_pset;
+static GTY(()) tree nonlocal_dummy_decls;
+
+/* Holds the variable DECLs that are locals.  */
+
+static GTY(()) tree saved_local_decls;
+
+/* The namespace of the module we're currently generating.  Only used while
+   outputting decls for module variables.  Do not rely on this being set.  */
+
+static gfc_namespace *module_namespace;
+
+/* The currently processed procedure symbol.  */
+static gfc_symbol* current_procedure_symbol = NULL;
+
+/* The currently processed module.  */
+static struct module_htab_entry *cur_module;
+
+/* With -fcoarray=lib: For generating the registering call
+   of static coarrays.  */
+static bool has_coarray_vars;
+static stmtblock_t caf_init_block;
+
+
+/* List of static constructor functions.  */
+
+tree gfc_static_ctors;
+
+
+/* Whether we've seen a symbol from an IEEE module in the namespace.  */
+static int seen_ieee_symbol;
+
+/* Function declarations for builtin library functions.  */
+
+tree gfor_fndecl_pause_numeric;
+tree gfor_fndecl_pause_string;
+tree gfor_fndecl_stop_numeric;
+tree gfor_fndecl_stop_string;
+tree gfor_fndecl_error_stop_numeric;
+tree gfor_fndecl_error_stop_string;
+tree gfor_fndecl_runtime_error;
+tree gfor_fndecl_runtime_error_at;
+tree gfor_fndecl_runtime_warning_at;
+tree gfor_fndecl_os_error;
+tree gfor_fndecl_generate_error;
+tree gfor_fndecl_set_args;
+tree gfor_fndecl_set_fpe;
+tree gfor_fndecl_set_options;
+tree gfor_fndecl_set_convert;
+tree gfor_fndecl_set_record_marker;
+tree gfor_fndecl_set_max_subrecord_length;
+tree gfor_fndecl_ctime;
+tree gfor_fndecl_fdate;
+tree gfor_fndecl_ttynam;
+tree gfor_fndecl_in_pack;
+tree gfor_fndecl_in_unpack;
+tree gfor_fndecl_associated;
+tree gfor_fndecl_system_clock4;
+tree gfor_fndecl_system_clock8;
+tree gfor_fndecl_ieee_procedure_entry;
+tree gfor_fndecl_ieee_procedure_exit;
+
+
+/* Coarray run-time library function decls.  */
+tree gfor_fndecl_caf_init;
+tree gfor_fndecl_caf_finalize;
+tree gfor_fndecl_caf_this_image;
+tree gfor_fndecl_caf_num_images;
+tree gfor_fndecl_caf_register;
+tree gfor_fndecl_caf_deregister;
+tree gfor_fndecl_caf_get;
+tree gfor_fndecl_caf_send;
+tree gfor_fndecl_caf_sendget;
+tree gfor_fndecl_caf_get_by_ref;
+tree gfor_fndecl_caf_send_by_ref;
+tree gfor_fndecl_caf_sendget_by_ref;
+tree gfor_fndecl_caf_sync_all;
+tree gfor_fndecl_caf_sync_memory;
+tree gfor_fndecl_caf_sync_images;
+tree gfor_fndecl_caf_stop_str;
+tree gfor_fndecl_caf_stop_numeric;
+tree gfor_fndecl_caf_error_stop;
+tree gfor_fndecl_caf_error_stop_str;
+tree gfor_fndecl_caf_atomic_def;
+tree gfor_fndecl_caf_atomic_ref;
+tree gfor_fndecl_caf_atomic_cas;
+tree gfor_fndecl_caf_atomic_op;
+tree gfor_fndecl_caf_lock;
+tree gfor_fndecl_caf_unlock;
+tree gfor_fndecl_caf_event_post;
+tree gfor_fndecl_caf_event_wait;
+tree gfor_fndecl_caf_event_query;
+tree gfor_fndecl_caf_fail_image;
+tree gfor_fndecl_caf_failed_images;
+tree gfor_fndecl_caf_image_status;
+tree gfor_fndecl_caf_stopped_images;
+tree gfor_fndecl_co_broadcast;
+tree gfor_fndecl_co_max;
+tree gfor_fndecl_co_min;
+tree gfor_fndecl_co_reduce;
+tree gfor_fndecl_co_sum;
+tree gfor_fndecl_caf_is_present;
+
+
+/* Math functions.  Many other math functions are handled in
+   trans-intrinsic.c.  */
+
+gfc_powdecl_list gfor_fndecl_math_powi[4][3];
+tree gfor_fndecl_math_ishftc4;
+tree gfor_fndecl_math_ishftc8;
+tree gfor_fndecl_math_ishftc16;
+
+
+/* String functions.  */
+
+tree gfor_fndecl_compare_string;
+tree gfor_fndecl_concat_string;
+tree gfor_fndecl_string_len_trim;
+tree gfor_fndecl_string_index;
+tree gfor_fndecl_string_scan;
+tree gfor_fndecl_string_verify;
+tree gfor_fndecl_string_trim;
+tree gfor_fndecl_string_minmax;
+tree gfor_fndecl_adjustl;
+tree gfor_fndecl_adjustr;
+tree gfor_fndecl_select_string;
+tree gfor_fndecl_compare_string_char4;
+tree gfor_fndecl_concat_string_char4;
+tree gfor_fndecl_string_len_trim_char4;
+tree gfor_fndecl_string_index_char4;
+tree gfor_fndecl_string_scan_char4;
+tree gfor_fndecl_string_verify_char4;
+tree gfor_fndecl_string_trim_char4;
+tree gfor_fndecl_string_minmax_char4;
+tree gfor_fndecl_adjustl_char4;
+tree gfor_fndecl_adjustr_char4;
+tree gfor_fndecl_select_string_char4;
+
+
+/* Conversion between character kinds.  */
+tree gfor_fndecl_convert_char1_to_char4;
+tree gfor_fndecl_convert_char4_to_char1;
+
+
+/* Other misc. runtime library functions.  */
+tree gfor_fndecl_size0;
+tree gfor_fndecl_size1;
+tree gfor_fndecl_iargc;
+
+/* Intrinsic functions implemented in Fortran.  */
+tree gfor_fndecl_sc_kind;
+tree gfor_fndecl_si_kind;
+tree gfor_fndecl_sr_kind;
+
+/* BLAS gemm functions.  */
+tree gfor_fndecl_sgemm;
+tree gfor_fndecl_dgemm;
+tree gfor_fndecl_cgemm;
+tree gfor_fndecl_zgemm;
+
+
+static void
+gfc_add_decl_to_parent_function (tree decl)
+{
+  gcc_assert (decl);
+  DECL_CONTEXT (decl) = DECL_CONTEXT (current_function_decl);
+  DECL_NONLOCAL (decl) = 1;
+  DECL_CHAIN (decl) = saved_parent_function_decls;
+  saved_parent_function_decls = decl;
+}
+
+void
+gfc_add_decl_to_function (tree decl)
+{
+  gcc_assert (decl);
+  TREE_USED (decl) = 1;
+  DECL_CONTEXT (decl) = current_function_decl;
+  DECL_CHAIN (decl) = saved_function_decls;
+  saved_function_decls = decl;
+}
+
+static void
+add_decl_as_local (tree decl)
+{
+  gcc_assert (decl);
+  TREE_USED (decl) = 1;
+  DECL_CONTEXT (decl) = current_function_decl;
+  DECL_CHAIN (decl) = saved_local_decls;
+  saved_local_decls = decl;
+}
+
+
+/* Build a  backend label declaration.  Set TREE_USED for named labels.
+   The context of the label is always the current_function_decl.  All
+   labels are marked artificial.  */
+
+tree
+gfc_build_label_decl (tree label_id)
+{
+  /* 2^32 temporaries should be enough.  */
+  static unsigned int tmp_num = 1;
+  tree label_decl;
+  char *label_name;
+
+  if (label_id == NULL_TREE)
+    {
+      /* Build an internal label name.  */
+      ASM_FORMAT_PRIVATE_NAME (label_name, "L", tmp_num++);
+      label_id = get_identifier (label_name);
+    }
+  else
+    label_name = NULL;
+
+  /* Build the LABEL_DECL node. Labels have no type.  */
+  label_decl = build_decl (input_location,
+			   LABEL_DECL, label_id, void_type_node);
+  DECL_CONTEXT (label_decl) = current_function_decl;
+  SET_DECL_MODE (label_decl, VOIDmode);
+
+  /* We always define the label as used, even if the original source
+     file never references the label.  We don't want all kinds of
+     spurious warnings for old-style Fortran code with too many
+     labels.  */
+  TREE_USED (label_decl) = 1;
+
+  DECL_ARTIFICIAL (label_decl) = 1;
+  return label_decl;
+}
+
+
+/* Set the backend source location of a decl.  */
+
+void
+gfc_set_decl_location (tree decl, locus * loc)
+{
+  DECL_SOURCE_LOCATION (decl) = loc->lb->location;
+}
+
+
+/* Return the backend label declaration for a given label structure,
+   or create it if it doesn't exist yet.  */
+
+tree
+gfc_get_label_decl (gfc_st_label * lp)
+{
+  if (lp->backend_decl)
+    return lp->backend_decl;
+  else
+    {
+      char label_name[GFC_MAX_SYMBOL_LEN + 1];
+      tree label_decl;
+
+      /* Validate the label declaration from the front end.  */
+      gcc_assert (lp != NULL && lp->value <= MAX_LABEL_VALUE);
+
+      /* Build a mangled name for the label.  */
+      sprintf (label_name, "__label_%.6d", lp->value);
+
+      /* Build the LABEL_DECL node.  */
+      label_decl = gfc_build_label_decl (get_identifier (label_name));
+
+      /* Tell the debugger where the label came from.  */
+      if (lp->value <= MAX_LABEL_VALUE)	/* An internal label.  */
+	gfc_set_decl_location (label_decl, &lp->where);
+      else
+	DECL_ARTIFICIAL (label_decl) = 1;
+
+      /* Store the label in the label list and return the LABEL_DECL.  */
+      lp->backend_decl = label_decl;
+      return label_decl;
+    }
+}
+
+
+/* Convert a gfc_symbol to an identifier of the same name.  */
+
+static tree
+gfc_sym_identifier (gfc_symbol * sym)
+{
+  if (sym->attr.is_main_program && strcmp (sym->name, "main") == 0)
+    return (get_identifier ("MAIN__"));
+  else
+    return (get_identifier (sym->name));
+}
+
+
+/* Construct mangled name from symbol name.  */
+
+static tree
+gfc_sym_mangled_identifier (gfc_symbol * sym)
+{
+  char name[GFC_MAX_MANGLED_SYMBOL_LEN + 1];
+
+  /* Prevent the mangling of identifiers that have an assigned
+     binding label (mainly those that are bind(c)).  */
+  if (sym->attr.is_bind_c == 1 && sym->binding_label)
+    return get_identifier (sym->binding_label);
+
+  if (!sym->fn_result_spec)
+    {
+      if (sym->module == NULL)
+	return gfc_sym_identifier (sym);
+      else
+	{
+	  snprintf (name, sizeof name, "__%s_MOD_%s", sym->module, sym->name);
+	  return get_identifier (name);
+	}
+    }
+  else
+    {
+      /* This is an entity that is actually local to a module procedure
+	 that appears in the result specification expression.  Since
+	 sym->module will be a zero length string, we use ns->proc_name
+	 instead. */
+      if (sym->ns->proc_name && sym->ns->proc_name->module)
+	{
+	  snprintf (name, sizeof name, "__%s_MOD__%s_PROC_%s",
+		    sym->ns->proc_name->module,
+		    sym->ns->proc_name->name,
+		    sym->name);
+	  return get_identifier (name);
+	}
+      else
+	{
+	  snprintf (name, sizeof name, "__%s_PROC_%s",
+		    sym->ns->proc_name->name, sym->name);
+	  return get_identifier (name);
+	}
+    }
+}
+
+
+/* Construct mangled function name from symbol name.  */
+
+static tree
+gfc_sym_mangled_function_id (gfc_symbol * sym)
+{
+  int has_underscore;
+  char name[GFC_MAX_MANGLED_SYMBOL_LEN + 1];
+
+  /* It may be possible to simply use the binding label if it's
+     provided, and remove the other checks.  Then we could use it
+     for other things if we wished.  */
+  if ((sym->attr.is_bind_c == 1 || sym->attr.is_iso_c == 1) &&
+      sym->binding_label)
+    /* use the binding label rather than the mangled name */
+    return get_identifier (sym->binding_label);
+
+  if ((sym->module == NULL || sym->attr.proc == PROC_EXTERNAL
+      || (sym->module != NULL && (sym->attr.external
+	    || sym->attr.if_source == IFSRC_IFBODY)))
+      && !sym->attr.module_procedure)
+    {
+      /* Main program is mangled into MAIN__.  */
+      if (sym->attr.is_main_program)
+	return get_identifier ("MAIN__");
+
+      /* Intrinsic procedures are never mangled.  */
+      if (sym->attr.proc == PROC_INTRINSIC)
+	return get_identifier (sym->name);
+
+      if (flag_underscoring)
+	{
+	  has_underscore = strchr (sym->name, '_') != 0;
+	  if (flag_second_underscore && has_underscore)
+	    snprintf (name, sizeof name, "%s__", sym->name);
+	  else
+	    snprintf (name, sizeof name, "%s_", sym->name);
+	  return get_identifier (name);
+	}
+      else
+	return get_identifier (sym->name);
+    }
+  else
+    {
+      snprintf (name, sizeof name, "__%s_MOD_%s", sym->module, sym->name);
+      return get_identifier (name);
+    }
+}
+
+
+void
+gfc_set_decl_assembler_name (tree decl, tree name)
+{
+  tree target_mangled = targetm.mangle_decl_assembler_name (decl, name);
+  SET_DECL_ASSEMBLER_NAME (decl, target_mangled);
+}
+
+
+/* Returns true if a variable of specified size should go on the stack.  */
+
+int
+gfc_can_put_var_on_stack (tree size)
+{
+  unsigned HOST_WIDE_INT low;
+
+  if (!INTEGER_CST_P (size))
+    return 0;
+
+  if (flag_max_stack_var_size < 0)
+    return 1;
+
+  if (!tree_fits_uhwi_p (size))
+    return 0;
+
+  low = TREE_INT_CST_LOW (size);
+  if (low > (unsigned HOST_WIDE_INT) flag_max_stack_var_size)
+    return 0;
+
+/* TODO: Set a per-function stack size limit.  */
+
+  return 1;
+}
+
+
+/* gfc_finish_cray_pointee sets DECL_VALUE_EXPR for a Cray pointee to
+   an expression involving its corresponding pointer.  There are
+   2 cases; one for variable size arrays, and one for everything else,
+   because variable-sized arrays require one fewer level of
+   indirection.  */
+
+static void
+gfc_finish_cray_pointee (tree decl, gfc_symbol *sym)
+{
+  tree ptr_decl = gfc_get_symbol_decl (sym->cp_pointer);
+  tree value;
+
+  /* Parameters need to be dereferenced.  */
+  if (sym->cp_pointer->attr.dummy)
+    ptr_decl = build_fold_indirect_ref_loc (input_location,
+					ptr_decl);
+
+  /* Check to see if we're dealing with a variable-sized array.  */
+  if (sym->attr.dimension
+      && TREE_CODE (TREE_TYPE (decl)) == POINTER_TYPE)
+    {
+      /* These decls will be dereferenced later, so we don't dereference
+	 them here.  */
+      value = convert (TREE_TYPE (decl), ptr_decl);
+    }
+  else
+    {
+      ptr_decl = convert (build_pointer_type (TREE_TYPE (decl)),
+			  ptr_decl);
+      value = build_fold_indirect_ref_loc (input_location,
+				       ptr_decl);
+    }
+
+  SET_DECL_VALUE_EXPR (decl, value);
+  DECL_HAS_VALUE_EXPR_P (decl) = 1;
+  GFC_DECL_CRAY_POINTEE (decl) = 1;
+}
+
+
+/* Finish processing of a declaration without an initial value.  */
+
+static void
+gfc_finish_decl (tree decl)
+{
+  gcc_assert (TREE_CODE (decl) == PARM_DECL
+	      || DECL_INITIAL (decl) == NULL_TREE);
+
+  if (!VAR_P (decl))
+    return;
+
+  if (DECL_SIZE (decl) == NULL_TREE
+      && TYPE_SIZE (TREE_TYPE (decl)) != NULL_TREE)
+    layout_decl (decl, 0);
+
+  /* A few consistency checks.  */
+  /* A static variable with an incomplete type is an error if it is
+     initialized. Also if it is not file scope. Otherwise, let it
+     through, but if it is not `extern' then it may cause an error
+     message later.  */
+  /* An automatic variable with an incomplete type is an error.  */
+
+  /* We should know the storage size.  */
+  gcc_assert (DECL_SIZE (decl) != NULL_TREE
+	      || (TREE_STATIC (decl)
+		  ? (!DECL_INITIAL (decl) || !DECL_CONTEXT (decl))
+		  : DECL_EXTERNAL (decl)));
+
+  /* The storage size should be constant.  */
+  gcc_assert ((!DECL_EXTERNAL (decl) && !TREE_STATIC (decl))
+	      || !DECL_SIZE (decl)
+	      || TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST);
+}
+
+
+/* Handle setting of GFC_DECL_SCALAR* on DECL.  */
+
+void
+gfc_finish_decl_attrs (tree decl, symbol_attribute *attr)
+{
+  if (!attr->dimension && !attr->codimension)
+    {
+      /* Handle scalar allocatable variables.  */
+      if (attr->allocatable)
+	{
+	  gfc_allocate_lang_decl (decl);
+	  GFC_DECL_SCALAR_ALLOCATABLE (decl) = 1;
+	}
+      /* Handle scalar pointer variables.  */
+      if (attr->pointer)
+	{
+	  gfc_allocate_lang_decl (decl);
+	  GFC_DECL_SCALAR_POINTER (decl) = 1;
+	}
+    }
+}
+
+
+/* Apply symbol attributes to a variable, and add it to the function scope.  */
+
+static void
+gfc_finish_var_decl (tree decl, gfc_symbol * sym)
+{
+  tree new_type;
+
+  /* Set DECL_VALUE_EXPR for Cray Pointees.  */
+  if (sym->attr.cray_pointee)
+    gfc_finish_cray_pointee (decl, sym);
+
+  /* TREE_ADDRESSABLE means the address of this variable is actually needed.
+     This is the equivalent of the TARGET variables.
+     We also need to set this if the variable is passed by reference in a
+     CALL statement.  */
+  if (sym->attr.target)
+    TREE_ADDRESSABLE (decl) = 1;
+
+  /* If it wasn't used we wouldn't be getting it.  */
+  TREE_USED (decl) = 1;
+
+  if (sym->attr.flavor == FL_PARAMETER
+      && (sym->attr.dimension || sym->ts.type == BT_DERIVED))
+    TREE_READONLY (decl) = 1;
+
+  /* Chain this decl to the pending declarations.  Don't do pushdecl()
+     because this would add them to the current scope rather than the
+     function scope.  */
+  if (current_function_decl != NULL_TREE)
+    {
+      if (sym->ns->proc_name->backend_decl == current_function_decl
+	  || sym->result == sym)
+	gfc_add_decl_to_function (decl);
+      else if (sym->ns->proc_name->attr.flavor == FL_LABEL)
+	/* This is a BLOCK construct.  */
+	add_decl_as_local (decl);
+      else
+	gfc_add_decl_to_parent_function (decl);
+    }
+
+  if (sym->attr.cray_pointee)
+    return;
+
+  if(sym->attr.is_bind_c == 1 && sym->binding_label)
+    {
+      /* We need to put variables that are bind(c) into the common
+	 segment of the object file, because this is what C would do.
+	 gfortran would typically put them in either the BSS or
+	 initialized data segments, and only mark them as common if
+	 they were part of common blocks.  However, if they are not put
+	 into common space, then C cannot initialize global Fortran
+	 variables that it interoperates with and the draft says that
+	 either Fortran or C should be able to initialize it (but not
+	 both, of course.) (J3/04-007, section 15.3).  */
+      TREE_PUBLIC(decl) = 1;
+      DECL_COMMON(decl) = 1;
+      if (sym->attr.access == ACCESS_PRIVATE && !sym->attr.public_used)
+	{
+	  DECL_VISIBILITY (decl) = VISIBILITY_HIDDEN;
+	  DECL_VISIBILITY_SPECIFIED (decl) = true;
+	}
+    }
+
+  /* If a variable is USE associated, it's always external.  */
+  if (sym->attr.use_assoc || sym->attr.used_in_submodule)
+    {
+      DECL_EXTERNAL (decl) = 1;
+      TREE_PUBLIC (decl) = 1;
+    }
+  else if (sym->fn_result_spec && !sym->ns->proc_name->module)
+    {
+
+      if (sym->ns->proc_name->attr.if_source != IFSRC_DECL)
+	DECL_EXTERNAL (decl) = 1;
+      else
+	TREE_STATIC (decl) = 1;
+
+      TREE_PUBLIC (decl) = 1;
+    }
+  else if (sym->module && !sym->attr.result && !sym->attr.dummy)
+    {
+      /* TODO: Don't set sym->module for result or dummy variables.  */
+      gcc_assert (current_function_decl == NULL_TREE || sym->result == sym);
+
+      TREE_PUBLIC (decl) = 1;
+      TREE_STATIC (decl) = 1;
+      if (sym->attr.access == ACCESS_PRIVATE && !sym->attr.public_used)
+	{
+	  DECL_VISIBILITY (decl) = VISIBILITY_HIDDEN;
+	  DECL_VISIBILITY_SPECIFIED (decl) = true;
+	}
+    }
+
+  /* Derived types are a bit peculiar because of the possibility of
+     a default initializer; this must be applied each time the variable
+     comes into scope it therefore need not be static.  These variables
+     are SAVE_NONE but have an initializer.  Otherwise explicitly
+     initialized variables are SAVE_IMPLICIT and explicitly saved are
+     SAVE_EXPLICIT.  */
+  if (!sym->attr.use_assoc
+	&& (sym->attr.save != SAVE_NONE || sym->attr.data
+	    || (sym->value && sym->ns->proc_name->attr.is_main_program)
+	    || (flag_coarray == GFC_FCOARRAY_LIB
+		&& sym->attr.codimension && !sym->attr.allocatable)))
+    TREE_STATIC (decl) = 1;
+
+  /* If derived-type variables with DTIO procedures are not made static
+     some bits of code referencing them get optimized away.
+     TODO Understand why this is so and fix it.  */
+  if (!sym->attr.use_assoc
+      && ((sym->ts.type == BT_DERIVED
+           && sym->ts.u.derived->attr.has_dtio_procs)
+	  || (sym->ts.type == BT_CLASS
+	      && CLASS_DATA (sym)->ts.u.derived->attr.has_dtio_procs)))
+    TREE_STATIC (decl) = 1;
+
+  if (sym->attr.volatile_)
+    {
+      TREE_THIS_VOLATILE (decl) = 1;
+      TREE_SIDE_EFFECTS (decl) = 1;
+      new_type = build_qualified_type (TREE_TYPE (decl), TYPE_QUAL_VOLATILE);
+      TREE_TYPE (decl) = new_type;
+    }
+
+  /* Keep variables larger than max-stack-var-size off stack.  */
+  if (!sym->ns->proc_name->attr.recursive && !sym->attr.automatic
+      && INTEGER_CST_P (DECL_SIZE_UNIT (decl))
+      && !gfc_can_put_var_on_stack (DECL_SIZE_UNIT (decl))
+	 /* Put variable length auto array pointers always into stack.  */
+      && (TREE_CODE (TREE_TYPE (decl)) != POINTER_TYPE
+	  || sym->attr.dimension == 0
+	  || sym->as->type != AS_EXPLICIT
+	  || sym->attr.pointer
+	  || sym->attr.allocatable)
+      && !DECL_ARTIFICIAL (decl))
+    {
+      TREE_STATIC (decl) = 1;
+
+      /* Because the size of this variable isn't known until now, we may have
+         greedily added an initializer to this variable (in build_init_assign)
+         even though the max-stack-var-size indicates the variable should be
+         static. Therefore we rip out the automatic initializer here and
+         replace it with a static one.  */
+      gfc_symtree *st = gfc_find_symtree (sym->ns->sym_root, sym->name);
+      gfc_code *prev = NULL;
+      gfc_code *code = sym->ns->code;
+      while (code && code->op == EXEC_INIT_ASSIGN)
+        {
+          /* Look for an initializer meant for this symbol.  */
+          if (code->expr1->symtree == st)
+            {
+              if (prev)
+                prev->next = code->next;
+              else
+                sym->ns->code = code->next;
+
+              break;
+            }
+
+          prev = code;
+          code = code->next;
+        }
+      if (code && code->op == EXEC_INIT_ASSIGN)
+        {
+          /* Keep the init expression for a static initializer.  */
+          sym->value = code->expr2;
+          /* Cleanup the defunct code object, without freeing the init expr.  */
+          code->expr2 = NULL;
+          gfc_free_statement (code);
+          free (code);
+        }
+    }
+
+  /* Handle threadprivate variables.  */
+  if (sym->attr.threadprivate
+      && (TREE_STATIC (decl) || DECL_EXTERNAL (decl)))
+    set_decl_tls_model (decl, decl_default_tls_model (decl));
+
+  gfc_finish_decl_attrs (decl, &sym->attr);
+}
+
+
+/* Allocate the lang-specific part of a decl.  */
+
+void
+gfc_allocate_lang_decl (tree decl)
+{
+  if (DECL_LANG_SPECIFIC (decl) == NULL)
+    DECL_LANG_SPECIFIC (decl) = ggc_cleared_alloc<struct lang_decl> ();
+}
+
+/* Remember a symbol to generate initialization/cleanup code at function
+   entry/exit.  */
+
+static void
+gfc_defer_symbol_init (gfc_symbol * sym)
+{
+  gfc_symbol *p;
+  gfc_symbol *last;
+  gfc_symbol *head;
+
+  /* Don't add a symbol twice.  */
+  if (sym->tlink)
+    return;
+
+  last = head = sym->ns->proc_name;
+  p = last->tlink;
+
+  /* Make sure that setup code for dummy variables which are used in the
+     setup of other variables is generated first.  */
+  if (sym->attr.dummy)
+    {
+      /* Find the first dummy arg seen after us, or the first non-dummy arg.
+         This is a circular list, so don't go past the head.  */
+      while (p != head
+             && (!p->attr.dummy || p->dummy_order > sym->dummy_order))
+        {
+          last = p;
+          p = p->tlink;
+        }
+    }
+  /* Insert in between last and p.  */
+  last->tlink = sym;
+  sym->tlink = p;
+}
+
+
+/* Used in gfc_get_symbol_decl and gfc_get_derived_type to obtain the
+   backend_decl for a module symbol, if it all ready exists.  If the
+   module gsymbol does not exist, it is created.  If the symbol does
+   not exist, it is added to the gsymbol namespace.  Returns true if
+   an existing backend_decl is found.  */
+
+bool
+gfc_get_module_backend_decl (gfc_symbol *sym)
+{
+  gfc_gsymbol *gsym;
+  gfc_symbol *s;
+  gfc_symtree *st;
+
+  gsym =  gfc_find_gsymbol (gfc_gsym_root, sym->module);
+
+  if (!gsym || (gsym->ns && gsym->type == GSYM_MODULE))
+    {
+      st = NULL;
+      s = NULL;
+
+      /* Check for a symbol with the same name. */
+      if (gsym)
+	gfc_find_symbol (sym->name, gsym->ns, 0, &s);
+
+      if (!s)
+	{
+	  if (!gsym)
+	    {
+	      gsym = gfc_get_gsymbol (sym->module);
+	      gsym->type = GSYM_MODULE;
+	      gsym->ns = gfc_get_namespace (NULL, 0);
+	    }
+
+	  st = gfc_new_symtree (&gsym->ns->sym_root, sym->name);
+	  st->n.sym = sym;
+	  sym->refs++;
+	}
+      else if (gfc_fl_struct (sym->attr.flavor))
+	{
+	  if (s && s->attr.flavor == FL_PROCEDURE)
+	    {
+	      gfc_interface *intr;
+	      gcc_assert (s->attr.generic);
+	      for (intr = s->generic; intr; intr = intr->next)
+		if (gfc_fl_struct (intr->sym->attr.flavor))
+		  {
+		    s = intr->sym;
+		    break;
+		  }
+    	    }
+
+          /* Normally we can assume that s is a derived-type symbol since it
+             shares a name with the derived-type sym. However if sym is a
+             STRUCTURE, it may in fact share a name with any other basic type
+             variable. If s is in fact of derived type then we can continue
+             looking for a duplicate type declaration.  */
+          if (sym->attr.flavor == FL_STRUCT && s->ts.type == BT_DERIVED)
+            {
+              s = s->ts.u.derived;
+            }
+
+	  if (gfc_fl_struct (s->attr.flavor) && !s->backend_decl)
+            {
+              if (s->attr.flavor == FL_UNION)
+                s->backend_decl = gfc_get_union_type (s);
+              else
+                s->backend_decl = gfc_get_derived_type (s);
+            }
+	  gfc_copy_dt_decls_ifequal (s, sym, true);
+	  return true;
+	}
+      else if (s->backend_decl)
+	{
+	  if (sym->ts.type == BT_DERIVED || sym->ts.type == BT_CLASS)
+	    gfc_copy_dt_decls_ifequal (s->ts.u.derived, sym->ts.u.derived,
+				       true);
+	  else if (sym->ts.type == BT_CHARACTER)
+	    sym->ts.u.cl->backend_decl = s->ts.u.cl->backend_decl;
+	  sym->backend_decl = s->backend_decl;
+	  return true;
+	}
+    }
+  return false;
+}
+
+
+/* Create an array index type variable with function scope.  */
+
+static tree
+create_index_var (const char * pfx, int nest)
+{
+  tree decl;
+
+  decl = gfc_create_var_np (gfc_array_index_type, pfx);
+  if (nest)
+    gfc_add_decl_to_parent_function (decl);
+  else
+    gfc_add_decl_to_function (decl);
+  return decl;
+}
+
+
+/* Create variables to hold all the non-constant bits of info for a
+   descriptorless array.  Remember these in the lang-specific part of the
+   type.  */
+
+static void
+gfc_build_qualified_array (tree decl, gfc_symbol * sym)
+{
+  tree type;
+  int dim;
+  int nest;
+  gfc_namespace* procns;
+  symbol_attribute *array_attr;
+  gfc_array_spec *as;
+  bool is_classarray = IS_CLASS_ARRAY (sym);
+
+  type = TREE_TYPE (decl);
+  array_attr = is_classarray ? &CLASS_DATA (sym)->attr : &sym->attr;
+  as = is_classarray ? CLASS_DATA (sym)->as : sym->as;
+
+  /* We just use the descriptor, if there is one.  */
+  if (GFC_DESCRIPTOR_TYPE_P (type))
+    return;
+
+  gcc_assert (GFC_ARRAY_TYPE_P (type));
+  procns = gfc_find_proc_namespace (sym->ns);
+  nest = (procns->proc_name->backend_decl != current_function_decl)
+	 && !sym->attr.contained;
+
+  if (array_attr->codimension && flag_coarray == GFC_FCOARRAY_LIB
+      && as->type != AS_ASSUMED_SHAPE
+      && GFC_TYPE_ARRAY_CAF_TOKEN (type) == NULL_TREE)
+    {
+      tree token;
+      tree token_type = build_qualified_type (pvoid_type_node,
+					      TYPE_QUAL_RESTRICT);
+
+      if (sym->module && (sym->attr.use_assoc
+			  || sym->ns->proc_name->attr.flavor == FL_MODULE))
+	{
+	  tree token_name
+		= get_identifier (gfc_get_string (GFC_PREFIX ("caf_token%s"),
+			IDENTIFIER_POINTER (gfc_sym_mangled_identifier (sym))));
+	  token = build_decl (DECL_SOURCE_LOCATION (decl), VAR_DECL, token_name,
+			      token_type);
+	  if (sym->attr.use_assoc)
+	    DECL_EXTERNAL (token) = 1;
+	  else
+	    TREE_STATIC (token) = 1;
+
+	  TREE_PUBLIC (token) = 1;
+
+	  if (sym->attr.access == ACCESS_PRIVATE && !sym->attr.public_used)
+	    {
+	      DECL_VISIBILITY (token) = VISIBILITY_HIDDEN;
+	      DECL_VISIBILITY_SPECIFIED (token) = true;
+	    }
+	}
+      else
+	{
+	  token = gfc_create_var_np (token_type, "caf_token");
+	  TREE_STATIC (token) = 1;
+	}
+
+      GFC_TYPE_ARRAY_CAF_TOKEN (type) = token;
+      DECL_ARTIFICIAL (token) = 1;
+      DECL_NONALIASED (token) = 1;
+
+      if (sym->module && !sym->attr.use_assoc)
+	{
+	  pushdecl (token);
+	  DECL_CONTEXT (token) = sym->ns->proc_name->backend_decl;
+	  gfc_module_add_decl (cur_module, token);
+	}
+      else if (sym->attr.host_assoc
+	       && TREE_CODE (DECL_CONTEXT (current_function_decl))
+	       != TRANSLATION_UNIT_DECL)
+	gfc_add_decl_to_parent_function (token);
+      else
+	gfc_add_decl_to_function (token);
+    }
+
+  for (dim = 0; dim < GFC_TYPE_ARRAY_RANK (type); dim++)
+    {
+      if (GFC_TYPE_ARRAY_LBOUND (type, dim) == NULL_TREE)
+	{
+	  GFC_TYPE_ARRAY_LBOUND (type, dim) = create_index_var ("lbound", nest);
+	  TREE_NO_WARNING (GFC_TYPE_ARRAY_LBOUND (type, dim)) = 1;
+	}
+      /* Don't try to use the unknown bound for assumed shape arrays.  */
+      if (GFC_TYPE_ARRAY_UBOUND (type, dim) == NULL_TREE
+	  && (as->type != AS_ASSUMED_SIZE
+	      || dim < GFC_TYPE_ARRAY_RANK (type) - 1))
+	{
+	  GFC_TYPE_ARRAY_UBOUND (type, dim) = create_index_var ("ubound", nest);
+	  TREE_NO_WARNING (GFC_TYPE_ARRAY_UBOUND (type, dim)) = 1;
+	}
+
+      if (GFC_TYPE_ARRAY_STRIDE (type, dim) == NULL_TREE)
+	{
+	  GFC_TYPE_ARRAY_STRIDE (type, dim) = create_index_var ("stride", nest);
+	  TREE_NO_WARNING (GFC_TYPE_ARRAY_STRIDE (type, dim)) = 1;
+	}
+    }
+  for (dim = GFC_TYPE_ARRAY_RANK (type);
+       dim < GFC_TYPE_ARRAY_RANK (type) + GFC_TYPE_ARRAY_CORANK (type); dim++)
+    {
+      if (GFC_TYPE_ARRAY_LBOUND (type, dim) == NULL_TREE)
+	{
+	  GFC_TYPE_ARRAY_LBOUND (type, dim) = create_index_var ("lbound", nest);
+	  TREE_NO_WARNING (GFC_TYPE_ARRAY_LBOUND (type, dim)) = 1;
+	}
+      /* Don't try to use the unknown ubound for the last coarray dimension.  */
+      if (GFC_TYPE_ARRAY_UBOUND (type, dim) == NULL_TREE
+          && dim < GFC_TYPE_ARRAY_RANK (type) + GFC_TYPE_ARRAY_CORANK (type) - 1)
+	{
+	  GFC_TYPE_ARRAY_UBOUND (type, dim) = create_index_var ("ubound", nest);
+	  TREE_NO_WARNING (GFC_TYPE_ARRAY_UBOUND (type, dim)) = 1;
+	}
+    }
+  if (GFC_TYPE_ARRAY_OFFSET (type) == NULL_TREE)
+    {
+      GFC_TYPE_ARRAY_OFFSET (type) = gfc_create_var_np (gfc_array_index_type,
+							"offset");
+      TREE_NO_WARNING (GFC_TYPE_ARRAY_OFFSET (type)) = 1;
+
+      if (nest)
+	gfc_add_decl_to_parent_function (GFC_TYPE_ARRAY_OFFSET (type));
+      else
+	gfc_add_decl_to_function (GFC_TYPE_ARRAY_OFFSET (type));
+    }
+
+  if (GFC_TYPE_ARRAY_SIZE (type) == NULL_TREE
+      && as->type != AS_ASSUMED_SIZE)
+    {
+      GFC_TYPE_ARRAY_SIZE (type) = create_index_var ("size", nest);
+      TREE_NO_WARNING (GFC_TYPE_ARRAY_SIZE (type)) = 1;
+    }
+
+  if (POINTER_TYPE_P (type))
+    {
+      gcc_assert (GFC_ARRAY_TYPE_P (TREE_TYPE (type)));
+      gcc_assert (TYPE_LANG_SPECIFIC (type)
+		  == TYPE_LANG_SPECIFIC (TREE_TYPE (type)));
+      type = TREE_TYPE (type);
+    }
+
+  if (! COMPLETE_TYPE_P (type) && GFC_TYPE_ARRAY_SIZE (type))
+    {
+      tree size, range;
+
+      size = fold_build2_loc (input_location, MINUS_EXPR, gfc_array_index_type,
+			      GFC_TYPE_ARRAY_SIZE (type), gfc_index_one_node);
+      range = build_range_type (gfc_array_index_type, gfc_index_zero_node,
+				size);
+      TYPE_DOMAIN (type) = range;
+      layout_type (type);
+    }
+
+  if (TYPE_NAME (type) != NULL_TREE && as->rank > 0
+      && GFC_TYPE_ARRAY_UBOUND (type, as->rank - 1) != NULL_TREE
+      && VAR_P (GFC_TYPE_ARRAY_UBOUND (type, as->rank - 1)))
+    {
+      tree gtype = DECL_ORIGINAL_TYPE (TYPE_NAME (type));
+
+      for (dim = 0; dim < as->rank - 1; dim++)
+	{
+	  gcc_assert (TREE_CODE (gtype) == ARRAY_TYPE);
+	  gtype = TREE_TYPE (gtype);
+	}
+      gcc_assert (TREE_CODE (gtype) == ARRAY_TYPE);
+      if (TYPE_MAX_VALUE (TYPE_DOMAIN (gtype)) == NULL)
+	TYPE_NAME (type) = NULL_TREE;
+    }
+
+  if (TYPE_NAME (type) == NULL_TREE)
+    {
+      tree gtype = TREE_TYPE (type), rtype, type_decl;
+
+      for (dim = as->rank - 1; dim >= 0; dim--)
+	{
+	  tree lbound, ubound;
+	  lbound = GFC_TYPE_ARRAY_LBOUND (type, dim);
+	  ubound = GFC_TYPE_ARRAY_UBOUND (type, dim);
+	  rtype = build_range_type (gfc_array_index_type, lbound, ubound);
+	  gtype = build_array_type (gtype, rtype);
+	  /* Ensure the bound variables aren't optimized out at -O0.
+	     For -O1 and above they often will be optimized out, but
+	     can be tracked by VTA.  Also set DECL_NAMELESS, so that
+	     the artificial lbound.N or ubound.N DECL_NAME doesn't
+	     end up in debug info.  */
+	  if (lbound
+	      && VAR_P (lbound)
+	      && DECL_ARTIFICIAL (lbound)
+	      && DECL_IGNORED_P (lbound))
+	    {
+	      if (DECL_NAME (lbound)
+		  && strstr (IDENTIFIER_POINTER (DECL_NAME (lbound)),
+			     "lbound") != 0)
+		DECL_NAMELESS (lbound) = 1;
+	      DECL_IGNORED_P (lbound) = 0;
+	    }
+	  if (ubound
+	      && VAR_P (ubound)
+	      && DECL_ARTIFICIAL (ubound)
+	      && DECL_IGNORED_P (ubound))
+	    {
+	      if (DECL_NAME (ubound)
+		  && strstr (IDENTIFIER_POINTER (DECL_NAME (ubound)),
+			     "ubound") != 0)
+		DECL_NAMELESS (ubound) = 1;
+	      DECL_IGNORED_P (ubound) = 0;
+	    }
+	}
+      TYPE_NAME (type) = type_decl = build_decl (input_location,
+						 TYPE_DECL, NULL, gtype);
+      DECL_ORIGINAL_TYPE (type_decl) = gtype;
+    }
+}
+
+
+/* For some dummy arguments we don't use the actual argument directly.
+   Instead we create a local decl and use that.  This allows us to perform
+   initialization, and construct full type information.  */
+
+static tree
+gfc_build_dummy_array_decl (gfc_symbol * sym, tree dummy)
+{
+  tree decl;
+  tree type;
+  gfc_array_spec *as;
+  symbol_attribute *array_attr;
+  char *name;
+  gfc_packed packed;
+  int n;
+  bool known_size;
+  bool is_classarray = IS_CLASS_ARRAY (sym);
+
+  /* Use the array as and attr.  */
+  as = is_classarray ? CLASS_DATA (sym)->as : sym->as;
+  array_attr = is_classarray ? &CLASS_DATA (sym)->attr : &sym->attr;
+
+  /* The dummy is returned for pointer, allocatable or assumed rank arrays.
+     For class arrays the information if sym is an allocatable or pointer
+     object needs to be checked explicitly (IS_CLASS_ARRAY can be false for
+     too many reasons to be of use here).  */
+  if ((sym->ts.type != BT_CLASS && sym->attr.pointer)
+      || (sym->ts.type == BT_CLASS && CLASS_DATA (sym)->attr.class_pointer)
+      || array_attr->allocatable
+      || (as && as->type == AS_ASSUMED_RANK))
+    return dummy;
+
+  /* Add to list of variables if not a fake result variable.
+     These symbols are set on the symbol only, not on the class component.  */
+  if (sym->attr.result || sym->attr.dummy)
+    gfc_defer_symbol_init (sym);
+
+  /* For a class array the array descriptor is in the _data component, while
+     for a regular array the TREE_TYPE of the dummy is a pointer to the
+     descriptor.  */
+  type = TREE_TYPE (is_classarray ? gfc_class_data_get (dummy)
+				  : TREE_TYPE (dummy));
+  /* type now is the array descriptor w/o any indirection.  */
+  gcc_assert (TREE_CODE (dummy) == PARM_DECL
+	  && POINTER_TYPE_P (TREE_TYPE (dummy)));
+
+  /* Do we know the element size?  */
+  known_size = sym->ts.type != BT_CHARACTER
+	  || INTEGER_CST_P (sym->ts.u.cl->backend_decl);
+
+  if (known_size && !GFC_DESCRIPTOR_TYPE_P (type))
+    {
+      /* For descriptorless arrays with known element size the actual
+         argument is sufficient.  */
+      gfc_build_qualified_array (dummy, sym);
+      return dummy;
+    }
+
+  if (GFC_DESCRIPTOR_TYPE_P (type))
+    {
+      /* Create a descriptorless array pointer.  */
+      packed = PACKED_NO;
+
+      /* Even when -frepack-arrays is used, symbols with TARGET attribute
+	 are not repacked.  */
+      if (!flag_repack_arrays || sym->attr.target)
+	{
+	  if (as->type == AS_ASSUMED_SIZE)
+	    packed = PACKED_FULL;
+	}
+      else
+	{
+	  if (as->type == AS_EXPLICIT)
+	    {
+	      packed = PACKED_FULL;
+	      for (n = 0; n < as->rank; n++)
+		{
+		  if (!(as->upper[n]
+			&& as->lower[n]
+			&& as->upper[n]->expr_type == EXPR_CONSTANT
+			&& as->lower[n]->expr_type == EXPR_CONSTANT))
+		    {
+		      packed = PACKED_PARTIAL;
+		      break;
+		    }
+		}
+	    }
+	  else
+	    packed = PACKED_PARTIAL;
+	}
+
+      /* For classarrays the element type is required, but
+	 gfc_typenode_for_spec () returns the array descriptor.  */
+      type = is_classarray ? gfc_get_element_type (type)
+			   : gfc_typenode_for_spec (&sym->ts);
+      type = gfc_get_nodesc_array_type (type, as, packed,
+					!sym->attr.target);
+    }
+  else
+    {
+      /* We now have an expression for the element size, so create a fully
+	 qualified type.  Reset sym->backend decl or this will just return the
+	 old type.  */
+      DECL_ARTIFICIAL (sym->backend_decl) = 1;
+      sym->backend_decl = NULL_TREE;
+      type = gfc_sym_type (sym);
+      packed = PACKED_FULL;
+    }
+
+  ASM_FORMAT_PRIVATE_NAME (name, IDENTIFIER_POINTER (DECL_NAME (dummy)), 0);
+  decl = build_decl (input_location,
+		     VAR_DECL, get_identifier (name), type);
+
+  DECL_ARTIFICIAL (decl) = 1;
+  DECL_NAMELESS (decl) = 1;
+  TREE_PUBLIC (decl) = 0;
+  TREE_STATIC (decl) = 0;
+  DECL_EXTERNAL (decl) = 0;
+
+  /* Avoid uninitialized warnings for optional dummy arguments.  */
+  if (sym->attr.optional)
+    TREE_NO_WARNING (decl) = 1;
+
+  /* We should never get deferred shape arrays here.  We used to because of
+     frontend bugs.  */
+  gcc_assert (as->type != AS_DEFERRED);
+
+  if (packed == PACKED_PARTIAL)
+    GFC_DECL_PARTIAL_PACKED_ARRAY (decl) = 1;
+  else if (packed == PACKED_FULL)
+    GFC_DECL_PACKED_ARRAY (decl) = 1;
+
+  gfc_build_qualified_array (decl, sym);
+
+  if (DECL_LANG_SPECIFIC (dummy))
+    DECL_LANG_SPECIFIC (decl) = DECL_LANG_SPECIFIC (dummy);
+  else
+    gfc_allocate_lang_decl (decl);
+
+  GFC_DECL_SAVED_DESCRIPTOR (decl) = dummy;
+
+  if (sym->ns->proc_name->backend_decl == current_function_decl
+      || sym->attr.contained)
+    gfc_add_decl_to_function (decl);
+  else
+    gfc_add_decl_to_parent_function (decl);
+
+  return decl;
+}
+
+/* For symbol SYM with GFC_DECL_SAVED_DESCRIPTOR used in contained
+   function add a VAR_DECL to the current function with DECL_VALUE_EXPR
+   pointing to the artificial variable for debug info purposes.  */
+
+static void
+gfc_nonlocal_dummy_array_decl (gfc_symbol *sym)
+{
+  tree decl, dummy;
+
+  if (! nonlocal_dummy_decl_pset)
+    nonlocal_dummy_decl_pset = new hash_set<tree>;
+
+  if (nonlocal_dummy_decl_pset->add (sym->backend_decl))
+    return;
+
+  dummy = GFC_DECL_SAVED_DESCRIPTOR (sym->backend_decl);
+  decl = build_decl (input_location, VAR_DECL, DECL_NAME (dummy),
+		     TREE_TYPE (sym->backend_decl));
+  DECL_ARTIFICIAL (decl) = 0;
+  TREE_USED (decl) = 1;
+  TREE_PUBLIC (decl) = 0;
+  TREE_STATIC (decl) = 0;
+  DECL_EXTERNAL (decl) = 0;
+  if (DECL_BY_REFERENCE (dummy))
+    DECL_BY_REFERENCE (decl) = 1;
+  DECL_LANG_SPECIFIC (decl) = DECL_LANG_SPECIFIC (sym->backend_decl);
+  SET_DECL_VALUE_EXPR (decl, sym->backend_decl);
+  DECL_HAS_VALUE_EXPR_P (decl) = 1;
+  DECL_CONTEXT (decl) = DECL_CONTEXT (sym->backend_decl);
+  DECL_CHAIN (decl) = nonlocal_dummy_decls;
+  nonlocal_dummy_decls = decl;
+}
+
+/* Return a constant or a variable to use as a string length.  Does not
+   add the decl to the current scope.  */
+
+static tree
+gfc_create_string_length (gfc_symbol * sym)
+{
+  gcc_assert (sym->ts.u.cl);
+  gfc_conv_const_charlen (sym->ts.u.cl);
+
+  if (sym->ts.u.cl->backend_decl == NULL_TREE)
+    {
+      tree length;
+      const char *name;
+
+      /* The string length variable shall be in static memory if it is either
+	 explicitly SAVED, a module variable or with -fno-automatic. Only
+	 relevant is "len=:" - otherwise, it is either a constant length or
+	 it is an automatic variable.  */
+      bool static_length = sym->attr.save
+			   || sym->ns->proc_name->attr.flavor == FL_MODULE
+			   || (flag_max_stack_var_size == 0
+			       && sym->ts.deferred && !sym->attr.dummy
+			       && !sym->attr.result && !sym->attr.function);
+
+      /* Also prefix the mangled name. We need to call GFC_PREFIX for static
+	 variables as some systems do not support the "." in the assembler name.
+	 For nonstatic variables, the "." does not appear in assembler.  */
+      if (static_length)
+	{
+	  if (sym->module)
+	    name = gfc_get_string (GFC_PREFIX ("%s_MOD_%s"), sym->module,
+				   sym->name);
+	  else
+	    name = gfc_get_string (GFC_PREFIX ("%s"), sym->name);
+	}
+      else if (sym->module)
+	name = gfc_get_string (".__%s_MOD_%s", sym->module, sym->name);
+      else
+	name = gfc_get_string (".%s", sym->name);
+
+      length = build_decl (input_location,
+			   VAR_DECL, get_identifier (name),
+			   gfc_charlen_type_node);
+      DECL_ARTIFICIAL (length) = 1;
+      TREE_USED (length) = 1;
+      if (sym->ns->proc_name->tlink != NULL)
+	gfc_defer_symbol_init (sym);
+
+      sym->ts.u.cl->backend_decl = length;
+
+      if (static_length)
+	TREE_STATIC (length) = 1;
+
+      if (sym->ns->proc_name->attr.flavor == FL_MODULE
+	  && (sym->attr.access != ACCESS_PRIVATE || sym->attr.public_used))
+	TREE_PUBLIC (length) = 1;
+    }
+
+  gcc_assert (sym->ts.u.cl->backend_decl != NULL_TREE);
+  return sym->ts.u.cl->backend_decl;
+}
+
+/* If a variable is assigned a label, we add another two auxiliary
+   variables.  */
+
+static void
+gfc_add_assign_aux_vars (gfc_symbol * sym)
+{
+  tree addr;
+  tree length;
+  tree decl;
+
+  gcc_assert (sym->backend_decl);
+
+  decl = sym->backend_decl;
+  gfc_allocate_lang_decl (decl);
+  GFC_DECL_ASSIGN (decl) = 1;
+  length = build_decl (input_location,
+		       VAR_DECL, create_tmp_var_name (sym->name),
+		       gfc_charlen_type_node);
+  addr = build_decl (input_location,
+		     VAR_DECL, create_tmp_var_name (sym->name),
+		     pvoid_type_node);
+  gfc_finish_var_decl (length, sym);
+  gfc_finish_var_decl (addr, sym);
+  /*  STRING_LENGTH is also used as flag. Less than -1 means that
+      ASSIGN_ADDR can not be used. Equal -1 means that ASSIGN_ADDR is the
+      target label's address. Otherwise, value is the length of a format string
+      and ASSIGN_ADDR is its address.  */
+  if (TREE_STATIC (length))
+    DECL_INITIAL (length) = build_int_cst (gfc_charlen_type_node, -2);
+  else
+    gfc_defer_symbol_init (sym);
+
+  GFC_DECL_STRING_LEN (decl) = length;
+  GFC_DECL_ASSIGN_ADDR (decl) = addr;
+}
+
+
+static tree
+add_attributes_to_decl (symbol_attribute sym_attr, tree list)
+{
+  unsigned id;
+  tree attr;
+
+  for (id = 0; id < EXT_ATTR_NUM; id++)
+    if (sym_attr.ext_attr & (1 << id))
+      {
+	attr = build_tree_list (
+		 get_identifier (ext_attr_list[id].middle_end_name),
+				 NULL_TREE);
+	list = chainon (list, attr);
+      }
+
+  if (sym_attr.omp_declare_target_link)
+    list = tree_cons (get_identifier ("omp declare target link"),
+		      NULL_TREE, list);
+  else if (sym_attr.omp_declare_target)
+    list = tree_cons (get_identifier ("omp declare target"),
+		      NULL_TREE, list);
+
+  if (sym_attr.oacc_function)
+    {
+      tree dims = NULL_TREE;
+      int ix;
+      int level = sym_attr.oacc_function - 1;
+
+      for (ix = GOMP_DIM_MAX; ix--;)
+	dims = tree_cons (build_int_cst (boolean_type_node, ix >= level),
+			  integer_zero_node, dims);
+
+      list = tree_cons (get_identifier ("oacc function"),
+			dims, list);
+    }
+
+  return list;
+}
+
+
+static void build_function_decl (gfc_symbol * sym, bool global);
+
+
+/* Return the decl for a gfc_symbol, create it if it doesn't already
+   exist.  */
+
+tree
+gfc_get_symbol_decl (gfc_symbol * sym)
+{
+  tree decl;
+  tree length = NULL_TREE;
+  tree attributes;
+  int byref;
+  bool intrinsic_array_parameter = false;
+  bool fun_or_res;
+
+  gcc_assert (sym->attr.referenced
+	      || sym->attr.flavor == FL_PROCEDURE
+	      || sym->attr.use_assoc
+	      || sym->attr.used_in_submodule
+	      || sym->ns->proc_name->attr.if_source == IFSRC_IFBODY
+	      || (sym->module && sym->attr.if_source != IFSRC_DECL
+		  && sym->backend_decl));
+
+  if (sym->ns && sym->ns->proc_name && sym->ns->proc_name->attr.function)
+    byref = gfc_return_by_reference (sym->ns->proc_name);
+  else
+    byref = 0;
+
+  /* Make sure that the vtab for the declared type is completed.  */
+  if (sym->ts.type == BT_CLASS)
+    {
+      gfc_component *c = CLASS_DATA (sym);
+      if (!c->ts.u.derived->backend_decl)
+	{
+	  gfc_find_derived_vtab (c->ts.u.derived);
+	  gfc_get_derived_type (sym->ts.u.derived);
+	}
+    }
+
+  /* PDT parameterized array components and string_lengths must have the
+     'len' parameters substituted for the expressions appearing in the
+     declaration of the entity and memory allocated/deallocated.  */
+  if ((sym->ts.type == BT_DERIVED || sym->ts.type == BT_CLASS)
+      && sym->param_list != NULL
+      && !(sym->attr.host_assoc || sym->attr.use_assoc || sym->attr.dummy))
+    gfc_defer_symbol_init (sym);
+
+  /* Dummy PDT 'len' parameters should be checked when they are explicit.  */
+  if ((sym->ts.type == BT_DERIVED || sym->ts.type == BT_CLASS)
+      && (gfc_option.rtcheck & GFC_RTCHECK_BOUNDS)
+      && sym->param_list != NULL
+      && sym->attr.dummy)
+    gfc_defer_symbol_init (sym);
+
+  /* All deferred character length procedures need to retain the backend
+     decl, which is a pointer to the character length in the caller's
+     namespace and to declare a local character length.  */
+  if (!byref && sym->attr.function
+	&& sym->ts.type == BT_CHARACTER
+	&& sym->ts.deferred
+	&& sym->ts.u.cl->passed_length == NULL
+	&& sym->ts.u.cl->backend_decl
+	&& TREE_CODE (sym->ts.u.cl->backend_decl) == PARM_DECL)
+    {
+      sym->ts.u.cl->passed_length = sym->ts.u.cl->backend_decl;
+      gcc_assert (POINTER_TYPE_P (TREE_TYPE (sym->ts.u.cl->passed_length)));
+      sym->ts.u.cl->backend_decl = build_fold_indirect_ref (sym->ts.u.cl->backend_decl);
+    }
+
+  fun_or_res = byref && (sym->attr.result
+			 || (sym->attr.function && sym->ts.deferred));
+  if ((sym->attr.dummy && ! sym->attr.function) || fun_or_res)
+    {
+      /* Return via extra parameter.  */
+      if (sym->attr.result && byref
+	  && !sym->backend_decl)
+	{
+	  sym->backend_decl =
+	    DECL_ARGUMENTS (sym->ns->proc_name->backend_decl);
+	  /* For entry master function skip over the __entry
+	     argument.  */
+	  if (sym->ns->proc_name->attr.entry_master)
+	    sym->backend_decl = DECL_CHAIN (sym->backend_decl);
+	}
+
+      /* Dummy variables should already have been created.  */
+      gcc_assert (sym->backend_decl);
+
+      if (sym->attr.pointer && sym->attr.dimension && sym->ts.type != BT_CLASS)
+	GFC_DECL_PTR_ARRAY_P (sym->backend_decl) = 1;
+
+      /* Create a character length variable.  */
+      if (sym->ts.type == BT_CHARACTER)
+	{
+	  /* For a deferred dummy, make a new string length variable.  */
+	  if (sym->ts.deferred
+		&&
+	     (sym->ts.u.cl->passed_length == sym->ts.u.cl->backend_decl))
+	    sym->ts.u.cl->backend_decl = NULL_TREE;
+
+	  if (sym->ts.deferred && byref)
+	    {
+	      /* The string length of a deferred char array is stored in the
+		 parameter at sym->ts.u.cl->backend_decl as a reference and
+		 marked as a result.  Exempt this variable from generating a
+		 temporary for it.  */
+	      if (sym->attr.result)
+		{
+		  /* We need to insert a indirect ref for param decls.  */
+		  if (sym->ts.u.cl->backend_decl
+		      && TREE_CODE (sym->ts.u.cl->backend_decl) == PARM_DECL)
+		    {
+		      sym->ts.u.cl->passed_length = sym->ts.u.cl->backend_decl;
+		      sym->ts.u.cl->backend_decl =
+			build_fold_indirect_ref (sym->ts.u.cl->backend_decl);
+		    }
+		}
+	      /* For all other parameters make sure, that they are copied so
+		 that the value and any modifications are local to the routine
+		 by generating a temporary variable.  */
+	      else if (sym->attr.function
+		       && sym->ts.u.cl->passed_length == NULL
+		       && sym->ts.u.cl->backend_decl)
+		{
+		  sym->ts.u.cl->passed_length = sym->ts.u.cl->backend_decl;
+		  if (POINTER_TYPE_P (TREE_TYPE (sym->ts.u.cl->passed_length)))
+		    sym->ts.u.cl->backend_decl
+			= build_fold_indirect_ref (sym->ts.u.cl->backend_decl);
+		  else
+		    sym->ts.u.cl->backend_decl = NULL_TREE;
+		}
+	    }
+
+	  if (sym->ts.u.cl->backend_decl == NULL_TREE)
+	    length = gfc_create_string_length (sym);
+	  else
+	    length = sym->ts.u.cl->backend_decl;
+	  if (VAR_P (length) && DECL_FILE_SCOPE_P (length))
+	    {
+	      /* Add the string length to the same context as the symbol.  */
+	      if (DECL_CONTEXT (sym->backend_decl) == current_function_decl)
+	        gfc_add_decl_to_function (length);
+	      else
+		gfc_add_decl_to_parent_function (length);
+
+	      gcc_assert (DECL_CONTEXT (sym->backend_decl) ==
+			    DECL_CONTEXT (length));
+
+	      gfc_defer_symbol_init (sym);
+	    }
+	}
+
+      /* Use a copy of the descriptor for dummy arrays.  */
+      if ((sym->attr.dimension || sym->attr.codimension)
+         && !TREE_USED (sym->backend_decl))
+        {
+	  decl = gfc_build_dummy_array_decl (sym, sym->backend_decl);
+	  /* Prevent the dummy from being detected as unused if it is copied.  */
+	  if (sym->backend_decl != NULL && decl != sym->backend_decl)
+	    DECL_ARTIFICIAL (sym->backend_decl) = 1;
+	  sym->backend_decl = decl;
+	}
+
+      /* Returning the descriptor for dummy class arrays is hazardous, because
+	 some caller is expecting an expression to apply the component refs to.
+	 Therefore the descriptor is only created and stored in
+	 sym->backend_decl's GFC_DECL_SAVED_DESCRIPTOR.  The caller is then
+	 responsible to extract it from there, when the descriptor is
+	 desired.  */
+      if (IS_CLASS_ARRAY (sym)
+	  && (!DECL_LANG_SPECIFIC (sym->backend_decl)
+	      || !GFC_DECL_SAVED_DESCRIPTOR (sym->backend_decl)))
+	{
+	  decl = gfc_build_dummy_array_decl (sym, sym->backend_decl);
+	  /* Prevent the dummy from being detected as unused if it is copied.  */
+	  if (sym->backend_decl != NULL && decl != sym->backend_decl)
+	    DECL_ARTIFICIAL (sym->backend_decl) = 1;
+	  sym->backend_decl = decl;
+	}
+
+      TREE_USED (sym->backend_decl) = 1;
+      if (sym->attr.assign && GFC_DECL_ASSIGN (sym->backend_decl) == 0)
+	{
+	  gfc_add_assign_aux_vars (sym);
+	}
+
+      if ((sym->attr.dimension || IS_CLASS_ARRAY (sym))
+	  && DECL_LANG_SPECIFIC (sym->backend_decl)
+	  && GFC_DECL_SAVED_DESCRIPTOR (sym->backend_decl)
+	  && DECL_CONTEXT (sym->backend_decl) != current_function_decl)
+	gfc_nonlocal_dummy_array_decl (sym);
+
+      if (sym->ts.type == BT_CLASS && sym->backend_decl)
+	GFC_DECL_CLASS(sym->backend_decl) = 1;
+
+     return sym->backend_decl;
+    }
+
+  if (sym->backend_decl)
+    return sym->backend_decl;
+
+  /* Special case for array-valued named constants from intrinsic
+     procedures; those are inlined.  */
+  if (sym->attr.use_assoc && sym->attr.flavor == FL_PARAMETER
+      && (sym->from_intmod == INTMOD_ISO_FORTRAN_ENV
+	  || sym->from_intmod == INTMOD_ISO_C_BINDING))
+    intrinsic_array_parameter = true;
+
+  /* If use associated compilation, use the module
+     declaration.  */
+  if ((sym->attr.flavor == FL_VARIABLE
+       || sym->attr.flavor == FL_PARAMETER)
+      && (sym->attr.use_assoc || sym->attr.used_in_submodule)
+      && !intrinsic_array_parameter
+      && sym->module
+      && gfc_get_module_backend_decl (sym))
+    {
+      if (sym->ts.type == BT_CLASS && sym->backend_decl)
+	GFC_DECL_CLASS(sym->backend_decl) = 1;
+      return sym->backend_decl;
+    }
+
+  if (sym->attr.flavor == FL_PROCEDURE)
+    {
+      /* Catch functions. Only used for actual parameters,
+	 procedure pointers and procptr initialization targets.  */
+      if (sym->attr.use_assoc
+	  || sym->attr.used_in_submodule
+	  || sym->attr.intrinsic
+	  || sym->attr.if_source != IFSRC_DECL)
+	{
+	  decl = gfc_get_extern_function_decl (sym);
+	  gfc_set_decl_location (decl, &sym->declared_at);
+	}
+      else
+	{
+	  if (!sym->backend_decl)
+	    build_function_decl (sym, false);
+	  decl = sym->backend_decl;
+	}
+      return decl;
+    }
+
+  if (sym->attr.intrinsic)
+    gfc_internal_error ("intrinsic variable which isn't a procedure");
+
+  /* Create string length decl first so that they can be used in the
+     type declaration.  For associate names, the target character
+     length is used. Set 'length' to a constant so that if the
+     string length is a variable, it is not finished a second time.  */
+  if (sym->ts.type == BT_CHARACTER)
+    {
+      if (sym->attr.associate_var
+	  && sym->ts.deferred
+	  && sym->assoc && sym->assoc->target
+	  && ((sym->assoc->target->expr_type == EXPR_VARIABLE
+	       && sym->assoc->target->symtree->n.sym->ts.type != BT_CHARACTER)
+	      || sym->assoc->target->expr_type == EXPR_FUNCTION))
+	sym->ts.u.cl->backend_decl = NULL_TREE;
+
+      if (sym->attr.associate_var
+	  && sym->ts.u.cl->backend_decl
+	  && VAR_P (sym->ts.u.cl->backend_decl))
+	length = gfc_index_zero_node;
+      else
+	length = gfc_create_string_length (sym);
+    }
+
+  /* Create the decl for the variable.  */
+  decl = build_decl (sym->declared_at.lb->location,
+		     VAR_DECL, gfc_sym_identifier (sym), gfc_sym_type (sym));
+
+  /* Add attributes to variables.  Functions are handled elsewhere.  */
+  attributes = add_attributes_to_decl (sym->attr, NULL_TREE);
+  decl_attributes (&decl, attributes, 0);
+
+  /* Symbols from modules should have their assembler names mangled.
+     This is done here rather than in gfc_finish_var_decl because it
+     is different for string length variables.  */
+  if (sym->module || sym->fn_result_spec)
+    {
+      gfc_set_decl_assembler_name (decl, gfc_sym_mangled_identifier (sym));
+      if (sym->attr.use_assoc && !intrinsic_array_parameter)
+	DECL_IGNORED_P (decl) = 1;
+    }
+
+  if (sym->attr.select_type_temporary)
+    {
+      DECL_ARTIFICIAL (decl) = 1;
+      DECL_IGNORED_P (decl) = 1;
+    }
+
+  if (sym->attr.dimension || sym->attr.codimension)
+    {
+      /* Create variables to hold the non-constant bits of array info.  */
+      gfc_build_qualified_array (decl, sym);
+
+      if (sym->attr.contiguous
+	  || ((sym->attr.allocatable || !sym->attr.dummy) && !sym->attr.pointer))
+	GFC_DECL_PACKED_ARRAY (decl) = 1;
+    }
+
+  /* Remember this variable for allocation/cleanup.  */
+  if (sym->attr.dimension || sym->attr.allocatable || sym->attr.codimension
+      || (sym->ts.type == BT_CLASS &&
+	  (CLASS_DATA (sym)->attr.dimension
+	   || CLASS_DATA (sym)->attr.allocatable))
+      || (sym->ts.type == BT_DERIVED
+	  && (sym->ts.u.derived->attr.alloc_comp
+	      || (!sym->attr.pointer && !sym->attr.artificial && !sym->attr.save
+		  && !sym->ns->proc_name->attr.is_main_program
+		  && gfc_is_finalizable (sym->ts.u.derived, NULL))))
+      /* This applies a derived type default initializer.  */
+      || (sym->ts.type == BT_DERIVED
+	  && sym->attr.save == SAVE_NONE
+	  && !sym->attr.data
+	  && !sym->attr.allocatable
+	  && (sym->value && !sym->ns->proc_name->attr.is_main_program)
+	  && !(sym->attr.use_assoc && !intrinsic_array_parameter)))
+    gfc_defer_symbol_init (sym);
+
+  /* Associate names can use the hidden string length variable
+     of their associated target.  */
+  if (sym->ts.type == BT_CHARACTER
+      && TREE_CODE (length) != INTEGER_CST)
+    {
+      gfc_finish_var_decl (length, sym);
+      gcc_assert (!sym->value);
+    }
+
+  gfc_finish_var_decl (decl, sym);
+
+  if (sym->ts.type == BT_CHARACTER)
+    /* Character variables need special handling.  */
+    gfc_allocate_lang_decl (decl);
+
+  if (sym->assoc && sym->attr.subref_array_pointer)
+    sym->attr.pointer = 1;
+
+  if (sym->attr.pointer && sym->attr.dimension
+      && !sym->ts.deferred
+      && !(sym->attr.select_type_temporary
+	   && !sym->attr.subref_array_pointer))
+    GFC_DECL_PTR_ARRAY_P (decl) = 1;
+
+  if (sym->ts.type == BT_CLASS)
+    GFC_DECL_CLASS(decl) = 1;
+
+  sym->backend_decl = decl;
+
+  if (sym->attr.assign)
+    gfc_add_assign_aux_vars (sym);
+
+  if (intrinsic_array_parameter)
+    {
+      TREE_STATIC (decl) = 1;
+      DECL_EXTERNAL (decl) = 0;
+    }
+
+  if (TREE_STATIC (decl)
+      && !(sym->attr.use_assoc && !intrinsic_array_parameter)
+      && (sym->attr.save || sym->ns->proc_name->attr.is_main_program
+	  || !gfc_can_put_var_on_stack (DECL_SIZE_UNIT (decl))
+	  || sym->attr.data || sym->ns->proc_name->attr.flavor == FL_MODULE)
+      && (flag_coarray != GFC_FCOARRAY_LIB
+	  || !sym->attr.codimension || sym->attr.allocatable))
+    {
+      /* Add static initializer. For procedures, it is only needed if
+	 SAVE is specified otherwise they need to be reinitialized
+	 every time the procedure is entered. The TREE_STATIC is
+	 in this case due to -fmax-stack-var-size=.  */
+
+      DECL_INITIAL (decl) = gfc_conv_initializer (sym->value, &sym->ts,
+				    TREE_TYPE (decl), sym->attr.dimension
+				    || (sym->attr.codimension
+					&& sym->attr.allocatable),
+				    sym->attr.pointer || sym->attr.allocatable
+				    || sym->ts.type == BT_CLASS,
+				    sym->attr.proc_pointer);
+    }
+
+  if (!TREE_STATIC (decl)
+      && POINTER_TYPE_P (TREE_TYPE (decl))
+      && !sym->attr.pointer
+      && !sym->attr.allocatable
+      && !sym->attr.proc_pointer
+      && !sym->attr.select_type_temporary)
+    DECL_BY_REFERENCE (decl) = 1;
+
+  if (sym->attr.associate_var)
+    GFC_DECL_ASSOCIATE_VAR_P (decl) = 1;
+
+  if (sym->attr.vtab
+      || (sym->name[0] == '_' && strncmp ("__def_init", sym->name, 10) == 0))
+    TREE_READONLY (decl) = 1;
+
+  return decl;
+}
+
+
+/* Substitute a temporary variable in place of the real one.  */
+
+void
+gfc_shadow_sym (gfc_symbol * sym, tree decl, gfc_saved_var * save)
+{
+  save->attr = sym->attr;
+  save->decl = sym->backend_decl;
+
+  gfc_clear_attr (&sym->attr);
+  sym->attr.referenced = 1;
+  sym->attr.flavor = FL_VARIABLE;
+
+  sym->backend_decl = decl;
+}
+
+
+/* Restore the original variable.  */
+
+void
+gfc_restore_sym (gfc_symbol * sym, gfc_saved_var * save)
+{
+  sym->attr = save->attr;
+  sym->backend_decl = save->decl;
+}
+
+
+/* Declare a procedure pointer.  */
+
+static tree
+get_proc_pointer_decl (gfc_symbol *sym)
+{
+  tree decl;
+  tree attributes;
+
+  decl = sym->backend_decl;
+  if (decl)
+    return decl;
+
+  decl = build_decl (input_location,
+		     VAR_DECL, get_identifier (sym->name),
+		     build_pointer_type (gfc_get_function_type (sym)));
+
+  if (sym->module)
+    {
+      /* Apply name mangling.  */
+      gfc_set_decl_assembler_name (decl, gfc_sym_mangled_identifier (sym));
+      if (sym->attr.use_assoc)
+	DECL_IGNORED_P (decl) = 1;
+    }
+
+  if ((sym->ns->proc_name
+      && sym->ns->proc_name->backend_decl == current_function_decl)
+      || sym->attr.contained)
+    gfc_add_decl_to_function (decl);
+  else if (sym->ns->proc_name->attr.flavor != FL_MODULE)
+    gfc_add_decl_to_parent_function (decl);
+
+  sym->backend_decl = decl;
+
+  /* If a variable is USE associated, it's always external.  */
+  if (sym->attr.use_assoc)
+    {
+      DECL_EXTERNAL (decl) = 1;
+      TREE_PUBLIC (decl) = 1;
+    }
+  else if (sym->module && sym->ns->proc_name->attr.flavor == FL_MODULE)
+    {
+      /* This is the declaration of a module variable.  */
+      TREE_PUBLIC (decl) = 1;
+      if (sym->attr.access == ACCESS_PRIVATE && !sym->attr.public_used)
+	{
+	  DECL_VISIBILITY (decl) = VISIBILITY_HIDDEN;
+	  DECL_VISIBILITY_SPECIFIED (decl) = true;
+	}
+      TREE_STATIC (decl) = 1;
+    }
+
+  if (!sym->attr.use_assoc
+	&& (sym->attr.save != SAVE_NONE || sym->attr.data
+	      || (sym->value && sym->ns->proc_name->attr.is_main_program)))
+    TREE_STATIC (decl) = 1;
+
+  if (TREE_STATIC (decl) && sym->value)
+    {
+      /* Add static initializer.  */
+      DECL_INITIAL (decl) = gfc_conv_initializer (sym->value, &sym->ts,
+						  TREE_TYPE (decl),
+						  sym->attr.dimension,
+						  false, true);
+    }
+
+  /* Handle threadprivate procedure pointers.  */
+  if (sym->attr.threadprivate
+      && (TREE_STATIC (decl) || DECL_EXTERNAL (decl)))
+    set_decl_tls_model (decl, decl_default_tls_model (decl));
+
+  attributes = add_attributes_to_decl (sym->attr, NULL_TREE);
+  decl_attributes (&decl, attributes, 0);
+
+  return decl;
+}
+
+
+/* Get a basic decl for an external function.  */
+
+tree
+gfc_get_extern_function_decl (gfc_symbol * sym)
+{
+  tree type;
+  tree fndecl;
+  tree attributes;
+  gfc_expr e;
+  gfc_intrinsic_sym *isym;
+  gfc_expr argexpr;
+  char s[GFC_MAX_SYMBOL_LEN + 23]; /* "_gfortran_f2c_specific" and '\0'.  */
+  tree name;
+  tree mangled_name;
+  gfc_gsymbol *gsym;
+
+  if (sym->backend_decl)
+    return sym->backend_decl;
+
+  /* We should never be creating external decls for alternate entry points.
+     The procedure may be an alternate entry point, but we don't want/need
+     to know that.  */
+  gcc_assert (!(sym->attr.entry || sym->attr.entry_master));
+
+  if (sym->attr.proc_pointer)
+    return get_proc_pointer_decl (sym);
+
+  /* See if this is an external procedure from the same file.  If so,
+     return the backend_decl.  */
+  gsym =  gfc_find_gsymbol (gfc_gsym_root, sym->binding_label
+					   ? sym->binding_label : sym->name);
+
+  if (gsym && !gsym->defined)
+    gsym = NULL;
+
+  /* This can happen because of C binding.  */
+  if (gsym && gsym->ns && gsym->ns->proc_name
+      && gsym->ns->proc_name->attr.flavor == FL_MODULE)
+    goto module_sym;
+
+  if ((!sym->attr.use_assoc || sym->attr.if_source != IFSRC_DECL)
+      && !sym->backend_decl
+      && gsym && gsym->ns
+      && ((gsym->type == GSYM_SUBROUTINE) || (gsym->type == GSYM_FUNCTION))
+      && (gsym->ns->proc_name->backend_decl || !sym->attr.intrinsic))
+    {
+      if (!gsym->ns->proc_name->backend_decl)
+	{
+	  /* By construction, the external function cannot be
+	     a contained procedure.  */
+	  locus old_loc;
+
+	  gfc_save_backend_locus (&old_loc);
+	  push_cfun (NULL);
+
+	  gfc_create_function_decl (gsym->ns, true);
+
+	  pop_cfun ();
+	  gfc_restore_backend_locus (&old_loc);
+	}
+
+      /* If the namespace has entries, the proc_name is the
+	 entry master.  Find the entry and use its backend_decl.
+	 otherwise, use the proc_name backend_decl.  */
+      if (gsym->ns->entries)
+	{
+	  gfc_entry_list *entry = gsym->ns->entries;
+
+	  for (; entry; entry = entry->next)
+	    {
+	      if (strcmp (gsym->name, entry->sym->name) == 0)
+		{
+	          sym->backend_decl = entry->sym->backend_decl;
+		  break;
+		}
+	    }
+	}
+      else
+	sym->backend_decl = gsym->ns->proc_name->backend_decl;
+
+      if (sym->backend_decl)
+	{
+	  /* Avoid problems of double deallocation of the backend declaration
+	     later in gfc_trans_use_stmts; cf. PR 45087.  */
+	  if (sym->attr.if_source != IFSRC_DECL && sym->attr.use_assoc)
+	    sym->attr.use_assoc = 0;
+
+	  return sym->backend_decl;
+	}
+    }
+
+  /* See if this is a module procedure from the same file.  If so,
+     return the backend_decl.  */
+  if (sym->module)
+    gsym =  gfc_find_gsymbol (gfc_gsym_root, sym->module);
+
+module_sym:
+  if (gsym && gsym->ns
+      && (gsym->type == GSYM_MODULE
+	  || (gsym->ns->proc_name && gsym->ns->proc_name->attr.flavor == FL_MODULE)))
+    {
+      gfc_symbol *s;
+
+      s = NULL;
+      if (gsym->type == GSYM_MODULE)
+	gfc_find_symbol (sym->name, gsym->ns, 0, &s);
+      else
+	gfc_find_symbol (gsym->sym_name, gsym->ns, 0, &s);
+
+      if (s && s->backend_decl)
+	{
+	  if (sym->ts.type == BT_DERIVED || sym->ts.type == BT_CLASS)
+	    gfc_copy_dt_decls_ifequal (s->ts.u.derived, sym->ts.u.derived,
+				       true);
+	  else if (sym->ts.type == BT_CHARACTER)
+	    sym->ts.u.cl->backend_decl = s->ts.u.cl->backend_decl;
+	  sym->backend_decl = s->backend_decl;
+	  return sym->backend_decl;
+	}
+    }
+
+  if (sym->attr.intrinsic)
+    {
+      /* Call the resolution function to get the actual name.  This is
+         a nasty hack which relies on the resolution functions only looking
+	 at the first argument.  We pass NULL for the second argument
+	 otherwise things like AINT get confused.  */
+      isym = gfc_find_function (sym->name);
+      gcc_assert (isym->resolve.f0 != NULL);
+
+      memset (&e, 0, sizeof (e));
+      e.expr_type = EXPR_FUNCTION;
+
+      memset (&argexpr, 0, sizeof (argexpr));
+      gcc_assert (isym->formal);
+      argexpr.ts = isym->formal->ts;
+
+      if (isym->formal->next == NULL)
+	isym->resolve.f1 (&e, &argexpr);
+      else
+	{
+	  if (isym->formal->next->next == NULL)
+	    isym->resolve.f2 (&e, &argexpr, NULL);
+	  else
+	    {
+	      if (isym->formal->next->next->next == NULL)
+		isym->resolve.f3 (&e, &argexpr, NULL, NULL);
+	      else
+		{
+		  /* All specific intrinsics take less than 5 arguments.  */
+		  gcc_assert (isym->formal->next->next->next->next == NULL);
+		  isym->resolve.f4 (&e, &argexpr, NULL, NULL, NULL);
+		}
+	    }
+	}
+
+      if (flag_f2c
+	  && ((e.ts.type == BT_REAL && e.ts.kind == gfc_default_real_kind)
+	      || e.ts.type == BT_COMPLEX))
+	{
+	  /* Specific which needs a different implementation if f2c
+	     calling conventions are used.  */
+	  sprintf (s, "_gfortran_f2c_specific%s", e.value.function.name);
+	}
+      else
+	sprintf (s, "_gfortran_specific%s", e.value.function.name);
+
+      name = get_identifier (s);
+      mangled_name = name;
+    }
+  else
+    {
+      name = gfc_sym_identifier (sym);
+      mangled_name = gfc_sym_mangled_function_id (sym);
+    }
+
+  type = gfc_get_function_type (sym);
+  fndecl = build_decl (input_location,
+		       FUNCTION_DECL, name, type);
+
+  /* Initialize DECL_EXTERNAL and TREE_PUBLIC before calling decl_attributes;
+     TREE_PUBLIC specifies whether a function is globally addressable (i.e.
+     the opposite of declaring a function as static in C).  */
+  DECL_EXTERNAL (fndecl) = 1;
+  TREE_PUBLIC (fndecl) = 1;
+
+  attributes = add_attributes_to_decl (sym->attr, NULL_TREE);
+  decl_attributes (&fndecl, attributes, 0);
+
+  gfc_set_decl_assembler_name (fndecl, mangled_name);
+
+  /* Set the context of this decl.  */
+  if (0 && sym->ns && sym->ns->proc_name)
+    {
+      /* TODO: Add external decls to the appropriate scope.  */
+      DECL_CONTEXT (fndecl) = sym->ns->proc_name->backend_decl;
+    }
+  else
+    {
+      /* Global declaration, e.g. intrinsic subroutine.  */
+      DECL_CONTEXT (fndecl) = NULL_TREE;
+    }
+
+  /* Set attributes for PURE functions. A call to PURE function in the
+     Fortran 95 sense is both pure and without side effects in the C
+     sense.  */
+  if (sym->attr.pure || sym->attr.implicit_pure)
+    {
+      if (sym->attr.function && !gfc_return_by_reference (sym))
+	DECL_PURE_P (fndecl) = 1;
+      /* TODO: check if pure SUBROUTINEs don't have INTENT(OUT)
+	 parameters and don't use alternate returns (is this
+	 allowed?). In that case, calls to them are meaningless, and
+	 can be optimized away. See also in build_function_decl().  */
+      TREE_SIDE_EFFECTS (fndecl) = 0;
+    }
+
+  /* Mark non-returning functions.  */
+  if (sym->attr.noreturn)
+      TREE_THIS_VOLATILE(fndecl) = 1;
+
+  sym->backend_decl = fndecl;
+
+  if (DECL_CONTEXT (fndecl) == NULL_TREE)
+    pushdecl_top_level (fndecl);
+
+  if (sym->formal_ns
+      && sym->formal_ns->proc_name == sym
+      && sym->formal_ns->omp_declare_simd)
+    gfc_trans_omp_declare_simd (sym->formal_ns);
+
+  return fndecl;
+}
+
+
+/* Create a declaration for a procedure.  For external functions (in the C
+   sense) use gfc_get_extern_function_decl.  HAS_ENTRIES is true if this is
+   a master function with alternate entry points.  */
+
+static void
+build_function_decl (gfc_symbol * sym, bool global)
+{
+  tree fndecl, type, attributes;
+  symbol_attribute attr;
+  tree result_decl;
+  gfc_formal_arglist *f;
+
+  bool module_procedure = sym->attr.module_procedure
+			  && sym->ns
+			  && sym->ns->proc_name
+			  && sym->ns->proc_name->attr.flavor == FL_MODULE;
+
+  gcc_assert (!sym->attr.external || module_procedure);
+
+  if (sym->backend_decl)
+    return;
+
+  /* Set the line and filename.  sym->declared_at seems to point to the
+     last statement for subroutines, but it'll do for now.  */
+  gfc_set_backend_locus (&sym->declared_at);
+
+  /* Allow only one nesting level.  Allow public declarations.  */
+  gcc_assert (current_function_decl == NULL_TREE
+	      || DECL_FILE_SCOPE_P (current_function_decl)
+	      || (TREE_CODE (DECL_CONTEXT (current_function_decl))
+		  == NAMESPACE_DECL));
+
+  type = gfc_get_function_type (sym);
+  fndecl = build_decl (input_location,
+		       FUNCTION_DECL, gfc_sym_identifier (sym), type);
+
+  attr = sym->attr;
+
+  /* Initialize DECL_EXTERNAL and TREE_PUBLIC before calling decl_attributes;
+     TREE_PUBLIC specifies whether a function is globally addressable (i.e.
+     the opposite of declaring a function as static in C).  */
+  DECL_EXTERNAL (fndecl) = 0;
+
+  if (sym->attr.access == ACCESS_UNKNOWN && sym->module
+      && (sym->ns->default_access == ACCESS_PRIVATE
+	  || (sym->ns->default_access == ACCESS_UNKNOWN
+	      && flag_module_private)))
+    sym->attr.access = ACCESS_PRIVATE;
+
+  if (!current_function_decl
+      && !sym->attr.entry_master && !sym->attr.is_main_program
+      && (sym->attr.access != ACCESS_PRIVATE || sym->binding_label
+	  || sym->attr.public_used))
+    TREE_PUBLIC (fndecl) = 1;
+
+  if (sym->attr.referenced || sym->attr.entry_master)
+    TREE_USED (fndecl) = 1;
+
+  attributes = add_attributes_to_decl (attr, NULL_TREE);
+  decl_attributes (&fndecl, attributes, 0);
+
+  /* Figure out the return type of the declared function, and build a
+     RESULT_DECL for it.  If this is a subroutine with alternate
+     returns, build a RESULT_DECL for it.  */
+  result_decl = NULL_TREE;
+  /* TODO: Shouldn't this just be TREE_TYPE (TREE_TYPE (fndecl)).  */
+  if (attr.function)
+    {
+      if (gfc_return_by_reference (sym))
+	type = void_type_node;
+      else
+	{
+	  if (sym->result != sym)
+	    result_decl = gfc_sym_identifier (sym->result);
+
+	  type = TREE_TYPE (TREE_TYPE (fndecl));
+	}
+    }
+  else
+    {
+      /* Look for alternate return placeholders.  */
+      int has_alternate_returns = 0;
+      for (f = gfc_sym_get_dummy_args (sym); f; f = f->next)
+	{
+	  if (f->sym == NULL)
+	    {
+	      has_alternate_returns = 1;
+	      break;
+	    }
+	}
+
+      if (has_alternate_returns)
+	type = integer_type_node;
+      else
+	type = void_type_node;
+    }
+
+  result_decl = build_decl (input_location,
+			    RESULT_DECL, result_decl, type);
+  DECL_ARTIFICIAL (result_decl) = 1;
+  DECL_IGNORED_P (result_decl) = 1;
+  DECL_CONTEXT (result_decl) = fndecl;
+  DECL_RESULT (fndecl) = result_decl;
+
+  /* Don't call layout_decl for a RESULT_DECL.
+     layout_decl (result_decl, 0);  */
+
+  /* TREE_STATIC means the function body is defined here.  */
+  TREE_STATIC (fndecl) = 1;
+
+  /* Set attributes for PURE functions. A call to a PURE function in the
+     Fortran 95 sense is both pure and without side effects in the C
+     sense.  */
+  if (attr.pure || attr.implicit_pure)
+    {
+      /* TODO: check if a pure SUBROUTINE has no INTENT(OUT) arguments
+	 including an alternate return. In that case it can also be
+	 marked as PURE. See also in gfc_get_extern_function_decl().  */
+      if (attr.function && !gfc_return_by_reference (sym))
+	DECL_PURE_P (fndecl) = 1;
+      TREE_SIDE_EFFECTS (fndecl) = 0;
+    }
+
+
+  /* Layout the function declaration and put it in the binding level
+     of the current function.  */
+
+  if (global)
+    pushdecl_top_level (fndecl);
+  else
+    pushdecl (fndecl);
+
+  /* Perform name mangling if this is a top level or module procedure.  */
+  if (current_function_decl == NULL_TREE)
+    gfc_set_decl_assembler_name (fndecl, gfc_sym_mangled_function_id (sym));
+
+  sym->backend_decl = fndecl;
+}
+
+
+/* Create the DECL_ARGUMENTS for a procedure.  */
+
+static void
+create_function_arglist (gfc_symbol * sym)
+{
+  tree fndecl;
+  gfc_formal_arglist *f;
+  tree typelist, hidden_typelist;
+  tree arglist, hidden_arglist;
+  tree type;
+  tree parm;
+
+  fndecl = sym->backend_decl;
+
+  /* Build formal argument list. Make sure that their TREE_CONTEXT is
+     the new FUNCTION_DECL node.  */
+  arglist = NULL_TREE;
+  hidden_arglist = NULL_TREE;
+  typelist = TYPE_ARG_TYPES (TREE_TYPE (fndecl));
+
+  if (sym->attr.entry_master)
+    {
+      type = TREE_VALUE (typelist);
+      parm = build_decl (input_location,
+			 PARM_DECL, get_identifier ("__entry"), type);
+
+      DECL_CONTEXT (parm) = fndecl;
+      DECL_ARG_TYPE (parm) = type;
+      TREE_READONLY (parm) = 1;
+      gfc_finish_decl (parm);
+      DECL_ARTIFICIAL (parm) = 1;
+
+      arglist = chainon (arglist, parm);
+      typelist = TREE_CHAIN (typelist);
+    }
+
+  if (gfc_return_by_reference (sym))
+    {
+      tree type = TREE_VALUE (typelist), length = NULL;
+
+      if (sym->ts.type == BT_CHARACTER)
+	{
+	  /* Length of character result.  */
+	  tree len_type = TREE_VALUE (TREE_CHAIN (typelist));
+
+	  length = build_decl (input_location,
+			       PARM_DECL,
+			       get_identifier (".__result"),
+			       len_type);
+	  if (POINTER_TYPE_P (len_type))
+	    {
+	      sym->ts.u.cl->passed_length = length;
+	      TREE_USED (length) = 1;
+	    }
+	  else if (!sym->ts.u.cl->length)
+	    {
+	      sym->ts.u.cl->backend_decl = length;
+	      TREE_USED (length) = 1;
+	    }
+	  gcc_assert (TREE_CODE (length) == PARM_DECL);
+	  DECL_CONTEXT (length) = fndecl;
+	  DECL_ARG_TYPE (length) = len_type;
+	  TREE_READONLY (length) = 1;
+	  DECL_ARTIFICIAL (length) = 1;
+	  gfc_finish_decl (length);
+	  if (sym->ts.u.cl->backend_decl == NULL
+	      || sym->ts.u.cl->backend_decl == length)
+	    {
+	      gfc_symbol *arg;
+	      tree backend_decl;
+
+	      if (sym->ts.u.cl->backend_decl == NULL)
+		{
+		  tree len = build_decl (input_location,
+					 VAR_DECL,
+					 get_identifier ("..__result"),
+					 gfc_charlen_type_node);
+		  DECL_ARTIFICIAL (len) = 1;
+		  TREE_USED (len) = 1;
+		  sym->ts.u.cl->backend_decl = len;
+		}
+
+	      /* Make sure PARM_DECL type doesn't point to incomplete type.  */
+	      arg = sym->result ? sym->result : sym;
+	      backend_decl = arg->backend_decl;
+	      /* Temporary clear it, so that gfc_sym_type creates complete
+		 type.  */
+	      arg->backend_decl = NULL;
+	      type = gfc_sym_type (arg);
+	      arg->backend_decl = backend_decl;
+	      type = build_reference_type (type);
+	    }
+	}
+
+      parm = build_decl (input_location,
+			 PARM_DECL, get_identifier ("__result"), type);
+
+      DECL_CONTEXT (parm) = fndecl;
+      DECL_ARG_TYPE (parm) = TREE_VALUE (typelist);
+      TREE_READONLY (parm) = 1;
+      DECL_ARTIFICIAL (parm) = 1;
+      gfc_finish_decl (parm);
+
+      arglist = chainon (arglist, parm);
+      typelist = TREE_CHAIN (typelist);
+
+      if (sym->ts.type == BT_CHARACTER)
+	{
+	  gfc_allocate_lang_decl (parm);
+	  arglist = chainon (arglist, length);
+	  typelist = TREE_CHAIN (typelist);
+	}
+    }
+
+  hidden_typelist = typelist;
+  for (f = gfc_sym_get_dummy_args (sym); f; f = f->next)
+    if (f->sym != NULL)	/* Ignore alternate returns.  */
+      hidden_typelist = TREE_CHAIN (hidden_typelist);
+
+  for (f = gfc_sym_get_dummy_args (sym); f; f = f->next)
+    {
+      char name[GFC_MAX_SYMBOL_LEN + 2];
+
+      /* Ignore alternate returns.  */
+      if (f->sym == NULL)
+	continue;
+
+      type = TREE_VALUE (typelist);
+
+      if (f->sym->ts.type == BT_CHARACTER
+	  && (!sym->attr.is_bind_c || sym->attr.entry_master))
+	{
+	  tree len_type = TREE_VALUE (hidden_typelist);
+	  tree length = NULL_TREE;
+	  if (!f->sym->ts.deferred)
+	    gcc_assert (len_type == gfc_charlen_type_node);
+	  else
+	    gcc_assert (POINTER_TYPE_P (len_type));
+
+	  strcpy (&name[1], f->sym->name);
+	  name[0] = '_';
+	  length = build_decl (input_location,
+			       PARM_DECL, get_identifier (name), len_type);
+
+	  hidden_arglist = chainon (hidden_arglist, length);
+	  DECL_CONTEXT (length) = fndecl;
+	  DECL_ARTIFICIAL (length) = 1;
+	  DECL_ARG_TYPE (length) = len_type;
+	  TREE_READONLY (length) = 1;
+	  gfc_finish_decl (length);
+
+	  /* Remember the passed value.  */
+          if (!f->sym->ts.u.cl ||  f->sym->ts.u.cl->passed_length)
+            {
+	      /* This can happen if the same type is used for multiple
+		 arguments. We need to copy cl as otherwise
+		 cl->passed_length gets overwritten.  */
+	      f->sym->ts.u.cl = gfc_new_charlen (f->sym->ns, f->sym->ts.u.cl);
+            }
+	  f->sym->ts.u.cl->passed_length = length;
+
+	  /* Use the passed value for assumed length variables.  */
+	  if (!f->sym->ts.u.cl->length)
+	    {
+	      TREE_USED (length) = 1;
+	      gcc_assert (!f->sym->ts.u.cl->backend_decl);
+	      f->sym->ts.u.cl->backend_decl = length;
+	    }
+
+	  hidden_typelist = TREE_CHAIN (hidden_typelist);
+
+	  if (f->sym->ts.u.cl->backend_decl == NULL
+	      || f->sym->ts.u.cl->backend_decl == length)
+	    {
+	      if (POINTER_TYPE_P (len_type))
+		f->sym->ts.u.cl->backend_decl =
+			build_fold_indirect_ref_loc (input_location, length);
+	      else if (f->sym->ts.u.cl->backend_decl == NULL)
+		gfc_create_string_length (f->sym);
+
+	      /* Make sure PARM_DECL type doesn't point to incomplete type.  */
+	      if (f->sym->attr.flavor == FL_PROCEDURE)
+		type = build_pointer_type (gfc_get_function_type (f->sym));
+	      else
+		type = gfc_sym_type (f->sym);
+	    }
+	}
+      /* For noncharacter scalar intrinsic types, VALUE passes the value,
+	 hence, the optional status cannot be transferred via a NULL pointer.
+	 Thus, we will use a hidden argument in that case.  */
+      else if (f->sym->attr.optional && f->sym->attr.value
+	       && !f->sym->attr.dimension && f->sym->ts.type != BT_CLASS
+	       && !gfc_bt_struct (f->sym->ts.type))
+	{
+          tree tmp;
+          strcpy (&name[1], f->sym->name);
+          name[0] = '_';
+          tmp = build_decl (input_location,
+			    PARM_DECL, get_identifier (name),
+			    boolean_type_node);
+
+          hidden_arglist = chainon (hidden_arglist, tmp);
+          DECL_CONTEXT (tmp) = fndecl;
+          DECL_ARTIFICIAL (tmp) = 1;
+          DECL_ARG_TYPE (tmp) = boolean_type_node;
+          TREE_READONLY (tmp) = 1;
+          gfc_finish_decl (tmp);
+	}
+
+      /* For non-constant length array arguments, make sure they use
+	 a different type node from TYPE_ARG_TYPES type.  */
+      if (f->sym->attr.dimension
+	  && type == TREE_VALUE (typelist)
+	  && TREE_CODE (type) == POINTER_TYPE
+	  && GFC_ARRAY_TYPE_P (type)
+	  && f->sym->as->type != AS_ASSUMED_SIZE
+	  && ! COMPLETE_TYPE_P (TREE_TYPE (type)))
+	{
+	  if (f->sym->attr.flavor == FL_PROCEDURE)
+	    type = build_pointer_type (gfc_get_function_type (f->sym));
+	  else
+	    type = gfc_sym_type (f->sym);
+	}
+
+      if (f->sym->attr.proc_pointer)
+        type = build_pointer_type (type);
+
+      if (f->sym->attr.volatile_)
+	type = build_qualified_type (type, TYPE_QUAL_VOLATILE);
+
+      /* Build the argument declaration.  */
+      parm = build_decl (input_location,
+			 PARM_DECL, gfc_sym_identifier (f->sym), type);
+
+      if (f->sym->attr.volatile_)
+	{
+	  TREE_THIS_VOLATILE (parm) = 1;
+	  TREE_SIDE_EFFECTS (parm) = 1;
+	}
+
+      /* Fill in arg stuff.  */
+      DECL_CONTEXT (parm) = fndecl;
+      DECL_ARG_TYPE (parm) = TREE_VALUE (typelist);
+      /* All implementation args except for VALUE are read-only.  */
+      if (!f->sym->attr.value)
+	TREE_READONLY (parm) = 1;
+      if (POINTER_TYPE_P (type)
+	  && (!f->sym->attr.proc_pointer
+	      && f->sym->attr.flavor != FL_PROCEDURE))
+	DECL_BY_REFERENCE (parm) = 1;
+
+      gfc_finish_decl (parm);
+      gfc_finish_decl_attrs (parm, &f->sym->attr);
+
+      f->sym->backend_decl = parm;
+
+      /* Coarrays which are descriptorless or assumed-shape pass with
+	 -fcoarray=lib the token and the offset as hidden arguments.  */
+      if (flag_coarray == GFC_FCOARRAY_LIB
+	  && ((f->sym->ts.type != BT_CLASS && f->sym->attr.codimension
+	       && !f->sym->attr.allocatable)
+	      || (f->sym->ts.type == BT_CLASS
+		  && CLASS_DATA (f->sym)->attr.codimension
+		  && !CLASS_DATA (f->sym)->attr.allocatable)))
+	{
+	  tree caf_type;
+	  tree token;
+	  tree offset;
+
+	  gcc_assert (f->sym->backend_decl != NULL_TREE
+		      && !sym->attr.is_bind_c);
+	  caf_type = f->sym->ts.type == BT_CLASS
+		     ? TREE_TYPE (CLASS_DATA (f->sym)->backend_decl)
+		     : TREE_TYPE (f->sym->backend_decl);
+
+	  token = build_decl (input_location, PARM_DECL,
+			      create_tmp_var_name ("caf_token"),
+			      build_qualified_type (pvoid_type_node,
+						    TYPE_QUAL_RESTRICT));
+	  if ((f->sym->ts.type != BT_CLASS
+	       && f->sym->as->type != AS_DEFERRED)
+	      || (f->sym->ts.type == BT_CLASS
+		  && CLASS_DATA (f->sym)->as->type != AS_DEFERRED))
+	    {
+	      gcc_assert (DECL_LANG_SPECIFIC (f->sym->backend_decl) == NULL
+			  || GFC_DECL_TOKEN (f->sym->backend_decl) == NULL_TREE);
+	      if (DECL_LANG_SPECIFIC (f->sym->backend_decl) == NULL)
+		gfc_allocate_lang_decl (f->sym->backend_decl);
+	      GFC_DECL_TOKEN (f->sym->backend_decl) = token;
+	    }
+          else
+	    {
+	      gcc_assert (GFC_TYPE_ARRAY_CAF_TOKEN (caf_type) == NULL_TREE);
+	      GFC_TYPE_ARRAY_CAF_TOKEN (caf_type) = token;
+	    }
+
+	  DECL_CONTEXT (token) = fndecl;
+	  DECL_ARTIFICIAL (token) = 1;
+	  DECL_ARG_TYPE (token) = TREE_VALUE (typelist);
+	  TREE_READONLY (token) = 1;
+	  hidden_arglist = chainon (hidden_arglist, token);
+	  gfc_finish_decl (token);
+
+	  offset = build_decl (input_location, PARM_DECL,
+			       create_tmp_var_name ("caf_offset"),
+			       gfc_array_index_type);
+
+	  if ((f->sym->ts.type != BT_CLASS
+	       && f->sym->as->type != AS_DEFERRED)
+	      || (f->sym->ts.type == BT_CLASS
+		  && CLASS_DATA (f->sym)->as->type != AS_DEFERRED))
+	    {
+	      gcc_assert (GFC_DECL_CAF_OFFSET (f->sym->backend_decl)
+					       == NULL_TREE);
+	      GFC_DECL_CAF_OFFSET (f->sym->backend_decl) = offset;
+	    }
+	  else
+	    {
+	      gcc_assert (GFC_TYPE_ARRAY_CAF_OFFSET (caf_type) == NULL_TREE);
+	      GFC_TYPE_ARRAY_CAF_OFFSET (caf_type) = offset;
+	    }
+	  DECL_CONTEXT (offset) = fndecl;
+	  DECL_ARTIFICIAL (offset) = 1;
+	  DECL_ARG_TYPE (offset) = TREE_VALUE (typelist);
+	  TREE_READONLY (offset) = 1;
+	  hidden_arglist = chainon (hidden_arglist, offset);
+	  gfc_finish_decl (offset);
+	}
+
+      arglist = chainon (arglist, parm);
+      typelist = TREE_CHAIN (typelist);
+    }
+
+  /* Add the hidden string length parameters, unless the procedure
+     is bind(C).  */
+  if (!sym->attr.is_bind_c)
+    arglist = chainon (arglist, hidden_arglist);
+
+  gcc_assert (hidden_typelist == NULL_TREE
+              || TREE_VALUE (hidden_typelist) == void_type_node);
+  DECL_ARGUMENTS (fndecl) = arglist;
+}
+
+/* Do the setup necessary before generating the body of a function.  */
+
+static void
+trans_function_start (gfc_symbol * sym)
+{
+  tree fndecl;
+
+  fndecl = sym->backend_decl;
+
+  /* Let GCC know the current scope is this function.  */
+  current_function_decl = fndecl;
+
+  /* Let the world know what we're about to do.  */
+  announce_function (fndecl);
+
+  if (DECL_FILE_SCOPE_P (fndecl))
+    {
+      /* Create RTL for function declaration.  */
+      rest_of_decl_compilation (fndecl, 1, 0);
+    }
+
+  /* Create RTL for function definition.  */
+  make_decl_rtl (fndecl);
+
+  allocate_struct_function (fndecl, false);
+
+  /* function.c requires a push at the start of the function.  */
+  pushlevel ();
+}
+
+/* Create thunks for alternate entry points.  */
+
+static void
+build_entry_thunks (gfc_namespace * ns, bool global)
+{
+  gfc_formal_arglist *formal;
+  gfc_formal_arglist *thunk_formal;
+  gfc_entry_list *el;
+  gfc_symbol *thunk_sym;
+  stmtblock_t body;
+  tree thunk_fndecl;
+  tree tmp;
+  locus old_loc;
+
+  /* This should always be a toplevel function.  */
+  gcc_assert (current_function_decl == NULL_TREE);
+
+  gfc_save_backend_locus (&old_loc);
+  for (el = ns->entries; el; el = el->next)
+    {
+      vec<tree, va_gc> *args = NULL;
+      vec<tree, va_gc> *string_args = NULL;
+
+      thunk_sym = el->sym;
+
+      build_function_decl (thunk_sym, global);
+      create_function_arglist (thunk_sym);
+
+      trans_function_start (thunk_sym);
+
+      thunk_fndecl = thunk_sym->backend_decl;
+
+      gfc_init_block (&body);
+
+      /* Pass extra parameter identifying this entry point.  */
+      tmp = build_int_cst (gfc_array_index_type, el->id);
+      vec_safe_push (args, tmp);
+
+      if (thunk_sym->attr.function)
+	{
+	  if (gfc_return_by_reference (ns->proc_name))
+	    {
+	      tree ref = DECL_ARGUMENTS (current_function_decl);
+	      vec_safe_push (args, ref);
+	      if (ns->proc_name->ts.type == BT_CHARACTER)
+		vec_safe_push (args, DECL_CHAIN (ref));
+	    }
+	}
+
+      for (formal = gfc_sym_get_dummy_args (ns->proc_name); formal;
+	   formal = formal->next)
+	{
+	  /* Ignore alternate returns.  */
+	  if (formal->sym == NULL)
+	    continue;
+
+	  /* We don't have a clever way of identifying arguments, so resort to
+	     a brute-force search.  */
+	  for (thunk_formal = gfc_sym_get_dummy_args (thunk_sym);
+	       thunk_formal;
+	       thunk_formal = thunk_formal->next)
+	    {
+	      if (thunk_formal->sym == formal->sym)
+		break;
+	    }
+
+	  if (thunk_formal)
+	    {
+	      /* Pass the argument.  */
+	      DECL_ARTIFICIAL (thunk_formal->sym->backend_decl) = 1;
+	      vec_safe_push (args, thunk_formal->sym->backend_decl);
+	      if (formal->sym->ts.type == BT_CHARACTER)
+		{
+		  tmp = thunk_formal->sym->ts.u.cl->backend_decl;
+		  vec_safe_push (string_args, tmp);
+		}
+	    }
+	  else
+	    {
+	      /* Pass NULL for a missing argument.  */
+	      vec_safe_push (args, null_pointer_node);
+	      if (formal->sym->ts.type == BT_CHARACTER)
+		{
+		  tmp = build_int_cst (gfc_charlen_type_node, 0);
+		  vec_safe_push (string_args, tmp);
+		}
+	    }
+	}
+
+      /* Call the master function.  */
+      vec_safe_splice (args, string_args);
+      tmp = ns->proc_name->backend_decl;
+      tmp = build_call_expr_loc_vec (input_location, tmp, args);
+      if (ns->proc_name->attr.mixed_entry_master)
+	{
+	  tree union_decl, field;
+	  tree master_type = TREE_TYPE (ns->proc_name->backend_decl);
+
+	  union_decl = build_decl (input_location,
+				   VAR_DECL, get_identifier ("__result"),
+				   TREE_TYPE (master_type));
+	  DECL_ARTIFICIAL (union_decl) = 1;
+	  DECL_EXTERNAL (union_decl) = 0;
+	  TREE_PUBLIC (union_decl) = 0;
+	  TREE_USED (union_decl) = 1;
+	  layout_decl (union_decl, 0);
+	  pushdecl (union_decl);
+
+	  DECL_CONTEXT (union_decl) = current_function_decl;
+	  tmp = fold_build2_loc (input_location, MODIFY_EXPR,
+				 TREE_TYPE (union_decl), union_decl, tmp);
+	  gfc_add_expr_to_block (&body, tmp);
+
+	  for (field = TYPE_FIELDS (TREE_TYPE (union_decl));
+	       field; field = DECL_CHAIN (field))
+	    if (strcmp (IDENTIFIER_POINTER (DECL_NAME (field)),
+		thunk_sym->result->name) == 0)
+	      break;
+	  gcc_assert (field != NULL_TREE);
+	  tmp = fold_build3_loc (input_location, COMPONENT_REF,
+				 TREE_TYPE (field), union_decl, field,
+				 NULL_TREE);
+	  tmp = fold_build2_loc (input_location, MODIFY_EXPR,
+			     TREE_TYPE (DECL_RESULT (current_function_decl)),
+			     DECL_RESULT (current_function_decl), tmp);
+	  tmp = build1_v (RETURN_EXPR, tmp);
+	}
+      else if (TREE_TYPE (DECL_RESULT (current_function_decl))
+	       != void_type_node)
+	{
+	  tmp = fold_build2_loc (input_location, MODIFY_EXPR,
+			     TREE_TYPE (DECL_RESULT (current_function_decl)),
+			     DECL_RESULT (current_function_decl), tmp);
+	  tmp = build1_v (RETURN_EXPR, tmp);
+	}
+      gfc_add_expr_to_block (&body, tmp);
+
+      /* Finish off this function and send it for code generation.  */
+      DECL_SAVED_TREE (thunk_fndecl) = gfc_finish_block (&body);
+      tmp = getdecls ();
+      poplevel (1, 1);
+      BLOCK_SUPERCONTEXT (DECL_INITIAL (thunk_fndecl)) = thunk_fndecl;
+      DECL_SAVED_TREE (thunk_fndecl)
+	= build3_v (BIND_EXPR, tmp, DECL_SAVED_TREE (thunk_fndecl),
+		    DECL_INITIAL (thunk_fndecl));
+
+      /* Output the GENERIC tree.  */
+      dump_function (TDI_original, thunk_fndecl);
+
+      /* Store the end of the function, so that we get good line number
+	 info for the epilogue.  */
+      cfun->function_end_locus = input_location;
+
+      /* We're leaving the context of this function, so zap cfun.
+	 It's still in DECL_STRUCT_FUNCTION, and we'll restore it in
+	 tree_rest_of_compilation.  */
+      set_cfun (NULL);
+
+      current_function_decl = NULL_TREE;
+
+      cgraph_node::finalize_function (thunk_fndecl, true);
+
+      /* We share the symbols in the formal argument list with other entry
+	 points and the master function.  Clear them so that they are
+	 recreated for each function.  */
+      for (formal = gfc_sym_get_dummy_args (thunk_sym); formal;
+	   formal = formal->next)
+	if (formal->sym != NULL)  /* Ignore alternate returns.  */
+	  {
+	    formal->sym->backend_decl = NULL_TREE;
+	    if (formal->sym->ts.type == BT_CHARACTER)
+	      formal->sym->ts.u.cl->backend_decl = NULL_TREE;
+	  }
+
+      if (thunk_sym->attr.function)
+	{
+	  if (thunk_sym->ts.type == BT_CHARACTER)
+	    thunk_sym->ts.u.cl->backend_decl = NULL_TREE;
+	  if (thunk_sym->result->ts.type == BT_CHARACTER)
+	    thunk_sym->result->ts.u.cl->backend_decl = NULL_TREE;
+	}
+    }
+
+  gfc_restore_backend_locus (&old_loc);
+}
+
+
+/* Create a decl for a function, and create any thunks for alternate entry
+   points. If global is true, generate the function in the global binding
+   level, otherwise in the current binding level (which can be global).  */
+
+void
+gfc_create_function_decl (gfc_namespace * ns, bool global)
+{
+  /* Create a declaration for the master function.  */
+  build_function_decl (ns->proc_name, global);
+
+  /* Compile the entry thunks.  */
+  if (ns->entries)
+    build_entry_thunks (ns, global);
+
+  /* Now create the read argument list.  */
+  create_function_arglist (ns->proc_name);
+
+  if (ns->omp_declare_simd)
+    gfc_trans_omp_declare_simd (ns);
+}
+
+/* Return the decl used to hold the function return value.  If
+   parent_flag is set, the context is the parent_scope.  */
+
+tree
+gfc_get_fake_result_decl (gfc_symbol * sym, int parent_flag)
+{
+  tree decl;
+  tree length;
+  tree this_fake_result_decl;
+  tree this_function_decl;
+
+  char name[GFC_MAX_SYMBOL_LEN + 10];
+
+  if (parent_flag)
+    {
+      this_fake_result_decl = parent_fake_result_decl;
+      this_function_decl = DECL_CONTEXT (current_function_decl);
+    }
+  else
+    {
+      this_fake_result_decl = current_fake_result_decl;
+      this_function_decl = current_function_decl;
+    }
+
+  if (sym
+      && sym->ns->proc_name->backend_decl == this_function_decl
+      && sym->ns->proc_name->attr.entry_master
+      && sym != sym->ns->proc_name)
+    {
+      tree t = NULL, var;
+      if (this_fake_result_decl != NULL)
+	for (t = TREE_CHAIN (this_fake_result_decl); t; t = TREE_CHAIN (t))
+	  if (strcmp (IDENTIFIER_POINTER (TREE_PURPOSE (t)), sym->name) == 0)
+	    break;
+      if (t)
+	return TREE_VALUE (t);
+      decl = gfc_get_fake_result_decl (sym->ns->proc_name, parent_flag);
+
+      if (parent_flag)
+	this_fake_result_decl = parent_fake_result_decl;
+      else
+	this_fake_result_decl = current_fake_result_decl;
+
+      if (decl && sym->ns->proc_name->attr.mixed_entry_master)
+	{
+	  tree field;
+
+	  for (field = TYPE_FIELDS (TREE_TYPE (decl));
+	       field; field = DECL_CHAIN (field))
+	    if (strcmp (IDENTIFIER_POINTER (DECL_NAME (field)),
+		sym->name) == 0)
+	      break;
+
+	  gcc_assert (field != NULL_TREE);
+	  decl = fold_build3_loc (input_location, COMPONENT_REF,
+				  TREE_TYPE (field), decl, field, NULL_TREE);
+	}
+
+      var = create_tmp_var_raw (TREE_TYPE (decl), sym->name);
+      if (parent_flag)
+	gfc_add_decl_to_parent_function (var);
+      else
+	gfc_add_decl_to_function (var);
+
+      SET_DECL_VALUE_EXPR (var, decl);
+      DECL_HAS_VALUE_EXPR_P (var) = 1;
+      GFC_DECL_RESULT (var) = 1;
+
+      TREE_CHAIN (this_fake_result_decl)
+	  = tree_cons (get_identifier (sym->name), var,
+		       TREE_CHAIN (this_fake_result_decl));
+      return var;
+    }
+
+  if (this_fake_result_decl != NULL_TREE)
+    return TREE_VALUE (this_fake_result_decl);
+
+  /* Only when gfc_get_fake_result_decl is called by gfc_trans_return,
+     sym is NULL.  */
+  if (!sym)
+    return NULL_TREE;
+
+  if (sym->ts.type == BT_CHARACTER)
+    {
+      if (sym->ts.u.cl->backend_decl == NULL_TREE)
+	length = gfc_create_string_length (sym);
+      else
+	length = sym->ts.u.cl->backend_decl;
+      if (VAR_P (length) && DECL_CONTEXT (length) == NULL_TREE)
+	gfc_add_decl_to_function (length);
+    }
+
+  if (gfc_return_by_reference (sym))
+    {
+      decl = DECL_ARGUMENTS (this_function_decl);
+
+      if (sym->ns->proc_name->backend_decl == this_function_decl
+	  && sym->ns->proc_name->attr.entry_master)
+	decl = DECL_CHAIN (decl);
+
+      TREE_USED (decl) = 1;
+      if (sym->as)
+	decl = gfc_build_dummy_array_decl (sym, decl);
+    }
+  else
+    {
+      sprintf (name, "__result_%.20s",
+	       IDENTIFIER_POINTER (DECL_NAME (this_function_decl)));
+
+      if (!sym->attr.mixed_entry_master && sym->attr.function)
+	decl = build_decl (DECL_SOURCE_LOCATION (this_function_decl),
+			   VAR_DECL, get_identifier (name),
+			   gfc_sym_type (sym));
+      else
+	decl = build_decl (DECL_SOURCE_LOCATION (this_function_decl),
+			   VAR_DECL, get_identifier (name),
+			   TREE_TYPE (TREE_TYPE (this_function_decl)));
+      DECL_ARTIFICIAL (decl) = 1;
+      DECL_EXTERNAL (decl) = 0;
+      TREE_PUBLIC (decl) = 0;
+      TREE_USED (decl) = 1;
+      GFC_DECL_RESULT (decl) = 1;
+      TREE_ADDRESSABLE (decl) = 1;
+
+      layout_decl (decl, 0);
+      gfc_finish_decl_attrs (decl, &sym->attr);
+
+      if (parent_flag)
+	gfc_add_decl_to_parent_function (decl);
+      else
+	gfc_add_decl_to_function (decl);
+    }
+
+  if (parent_flag)
+    parent_fake_result_decl = build_tree_list (NULL, decl);
+  else
+    current_fake_result_decl = build_tree_list (NULL, decl);
+
+  return decl;
+}
+
+
+/* Builds a function decl.  The remaining parameters are the types of the
+   function arguments.  Negative nargs indicates a varargs function.  */
+
+static tree
+build_library_function_decl_1 (tree name, const char *spec,
+			       tree rettype, int nargs, va_list p)
+{
+  vec<tree, va_gc> *arglist;
+  tree fntype;
+  tree fndecl;
+  int n;
+
+  /* Library functions must be declared with global scope.  */
+  gcc_assert (current_function_decl == NULL_TREE);
+
+  /* Create a list of the argument types.  */
+  vec_alloc (arglist, abs (nargs));
+  for (n = abs (nargs); n > 0; n--)
+    {
+      tree argtype = va_arg (p, tree);
+      arglist->quick_push (argtype);
+    }
+
+  /* Build the function type and decl.  */
+  if (nargs >= 0)
+    fntype = build_function_type_vec (rettype, arglist);
+  else
+    fntype = build_varargs_function_type_vec (rettype, arglist);
+  if (spec)
+    {
+      tree attr_args = build_tree_list (NULL_TREE,
+					build_string (strlen (spec), spec));
+      tree attrs = tree_cons (get_identifier ("fn spec"),
+			      attr_args, TYPE_ATTRIBUTES (fntype));
+      fntype = build_type_attribute_variant (fntype, attrs);
+    }
+  fndecl = build_decl (input_location,
+		       FUNCTION_DECL, name, fntype);
+
+  /* Mark this decl as external.  */
+  DECL_EXTERNAL (fndecl) = 1;
+  TREE_PUBLIC (fndecl) = 1;
+
+  pushdecl (fndecl);
+
+  rest_of_decl_compilation (fndecl, 1, 0);
+
+  return fndecl;
+}
+
+/* Builds a function decl.  The remaining parameters are the types of the
+   function arguments.  Negative nargs indicates a varargs function.  */
+
+tree
+gfc_build_library_function_decl (tree name, tree rettype, int nargs, ...)
+{
+  tree ret;
+  va_list args;
+  va_start (args, nargs);
+  ret = build_library_function_decl_1 (name, NULL, rettype, nargs, args);
+  va_end (args);
+  return ret;
+}
+
+/* Builds a function decl.  The remaining parameters are the types of the
+   function arguments.  Negative nargs indicates a varargs function.
+   The SPEC parameter specifies the function argument and return type
+   specification according to the fnspec function type attribute.  */
+
+tree
+gfc_build_library_function_decl_with_spec (tree name, const char *spec,
+					   tree rettype, int nargs, ...)
+{
+  tree ret;
+  va_list args;
+  va_start (args, nargs);
+  ret = build_library_function_decl_1 (name, spec, rettype, nargs, args);
+  va_end (args);
+  return ret;
+}
+
+static void
+gfc_build_intrinsic_function_decls (void)
+{
+  tree gfc_int4_type_node = gfc_get_int_type (4);
+  tree gfc_pint4_type_node = build_pointer_type (gfc_int4_type_node);
+  tree gfc_int8_type_node = gfc_get_int_type (8);
+  tree gfc_pint8_type_node = build_pointer_type (gfc_int8_type_node);
+  tree gfc_int16_type_node = gfc_get_int_type (16);
+  tree gfc_logical4_type_node = gfc_get_logical_type (4);
+  tree pchar1_type_node = gfc_get_pchar_type (1);
+  tree pchar4_type_node = gfc_get_pchar_type (4);
+
+  /* String functions.  */
+  gfor_fndecl_compare_string = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("compare_string")), "..R.R",
+	integer_type_node, 4, gfc_charlen_type_node, pchar1_type_node,
+	gfc_charlen_type_node, pchar1_type_node);
+  DECL_PURE_P (gfor_fndecl_compare_string) = 1;
+  TREE_NOTHROW (gfor_fndecl_compare_string) = 1;
+
+  gfor_fndecl_concat_string = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("concat_string")), "..W.R.R",
+	void_type_node, 6, gfc_charlen_type_node, pchar1_type_node,
+	gfc_charlen_type_node, pchar1_type_node,
+	gfc_charlen_type_node, pchar1_type_node);
+  TREE_NOTHROW (gfor_fndecl_concat_string) = 1;
+
+  gfor_fndecl_string_len_trim = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("string_len_trim")), "..R",
+	gfc_charlen_type_node, 2, gfc_charlen_type_node, pchar1_type_node);
+  DECL_PURE_P (gfor_fndecl_string_len_trim) = 1;
+  TREE_NOTHROW (gfor_fndecl_string_len_trim) = 1;
+
+  gfor_fndecl_string_index = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("string_index")), "..R.R.",
+	gfc_charlen_type_node, 5, gfc_charlen_type_node, pchar1_type_node,
+	gfc_charlen_type_node, pchar1_type_node, gfc_logical4_type_node);
+  DECL_PURE_P (gfor_fndecl_string_index) = 1;
+  TREE_NOTHROW (gfor_fndecl_string_index) = 1;
+
+  gfor_fndecl_string_scan = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("string_scan")), "..R.R.",
+	gfc_charlen_type_node, 5, gfc_charlen_type_node, pchar1_type_node,
+	gfc_charlen_type_node, pchar1_type_node, gfc_logical4_type_node);
+  DECL_PURE_P (gfor_fndecl_string_scan) = 1;
+  TREE_NOTHROW (gfor_fndecl_string_scan) = 1;
+
+  gfor_fndecl_string_verify = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("string_verify")), "..R.R.",
+	gfc_charlen_type_node, 5, gfc_charlen_type_node, pchar1_type_node,
+	gfc_charlen_type_node, pchar1_type_node, gfc_logical4_type_node);
+  DECL_PURE_P (gfor_fndecl_string_verify) = 1;
+  TREE_NOTHROW (gfor_fndecl_string_verify) = 1;
+
+  gfor_fndecl_string_trim = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("string_trim")), ".Ww.R",
+	void_type_node, 4, build_pointer_type (gfc_charlen_type_node),
+	build_pointer_type (pchar1_type_node), gfc_charlen_type_node,
+	pchar1_type_node);
+
+  gfor_fndecl_string_minmax = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("string_minmax")), ".Ww.R",
+	void_type_node, -4, build_pointer_type (gfc_charlen_type_node),
+	build_pointer_type (pchar1_type_node), integer_type_node,
+	integer_type_node);
+
+  gfor_fndecl_adjustl = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("adjustl")), ".W.R",
+	void_type_node, 3, pchar1_type_node, gfc_charlen_type_node,
+	pchar1_type_node);
+  TREE_NOTHROW (gfor_fndecl_adjustl) = 1;
+
+  gfor_fndecl_adjustr = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("adjustr")), ".W.R",
+	void_type_node, 3, pchar1_type_node, gfc_charlen_type_node,
+	pchar1_type_node);
+  TREE_NOTHROW (gfor_fndecl_adjustr) = 1;
+
+  gfor_fndecl_select_string =  gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("select_string")), ".R.R.",
+	integer_type_node, 4, pvoid_type_node, integer_type_node,
+	pchar1_type_node, gfc_charlen_type_node);
+  DECL_PURE_P (gfor_fndecl_select_string) = 1;
+  TREE_NOTHROW (gfor_fndecl_select_string) = 1;
+
+  gfor_fndecl_compare_string_char4 = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("compare_string_char4")), "..R.R",
+	integer_type_node, 4, gfc_charlen_type_node, pchar4_type_node,
+	gfc_charlen_type_node, pchar4_type_node);
+  DECL_PURE_P (gfor_fndecl_compare_string_char4) = 1;
+  TREE_NOTHROW (gfor_fndecl_compare_string_char4) = 1;
+
+  gfor_fndecl_concat_string_char4 = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("concat_string_char4")), "..W.R.R",
+	void_type_node, 6, gfc_charlen_type_node, pchar4_type_node,
+	gfc_charlen_type_node, pchar4_type_node, gfc_charlen_type_node,
+	pchar4_type_node);
+  TREE_NOTHROW (gfor_fndecl_concat_string_char4) = 1;
+
+  gfor_fndecl_string_len_trim_char4 = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("string_len_trim_char4")), "..R",
+	gfc_charlen_type_node, 2, gfc_charlen_type_node, pchar4_type_node);
+  DECL_PURE_P (gfor_fndecl_string_len_trim_char4) = 1;
+  TREE_NOTHROW (gfor_fndecl_string_len_trim_char4) = 1;
+
+  gfor_fndecl_string_index_char4 = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("string_index_char4")), "..R.R.",
+	gfc_charlen_type_node, 5, gfc_charlen_type_node, pchar4_type_node,
+	gfc_charlen_type_node, pchar4_type_node, gfc_logical4_type_node);
+  DECL_PURE_P (gfor_fndecl_string_index_char4) = 1;
+  TREE_NOTHROW (gfor_fndecl_string_index_char4) = 1;
+
+  gfor_fndecl_string_scan_char4 = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("string_scan_char4")), "..R.R.",
+	gfc_charlen_type_node, 5, gfc_charlen_type_node, pchar4_type_node,
+	gfc_charlen_type_node, pchar4_type_node, gfc_logical4_type_node);
+  DECL_PURE_P (gfor_fndecl_string_scan_char4) = 1;
+  TREE_NOTHROW (gfor_fndecl_string_scan_char4) = 1;
+
+  gfor_fndecl_string_verify_char4 = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("string_verify_char4")), "..R.R.",
+	gfc_charlen_type_node, 5, gfc_charlen_type_node, pchar4_type_node,
+	gfc_charlen_type_node, pchar4_type_node, gfc_logical4_type_node);
+  DECL_PURE_P (gfor_fndecl_string_verify_char4) = 1;
+  TREE_NOTHROW (gfor_fndecl_string_verify_char4) = 1;
+
+  gfor_fndecl_string_trim_char4 = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("string_trim_char4")), ".Ww.R",
+	void_type_node, 4, build_pointer_type (gfc_charlen_type_node),
+	build_pointer_type (pchar4_type_node), gfc_charlen_type_node,
+	pchar4_type_node);
+
+  gfor_fndecl_string_minmax_char4 = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("string_minmax_char4")), ".Ww.R",
+	void_type_node, -4, build_pointer_type (gfc_charlen_type_node),
+	build_pointer_type (pchar4_type_node), integer_type_node,
+	integer_type_node);
+
+  gfor_fndecl_adjustl_char4 = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("adjustl_char4")), ".W.R",
+	void_type_node, 3, pchar4_type_node, gfc_charlen_type_node,
+	pchar4_type_node);
+  TREE_NOTHROW (gfor_fndecl_adjustl_char4) = 1;
+
+  gfor_fndecl_adjustr_char4 = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("adjustr_char4")), ".W.R",
+	void_type_node, 3, pchar4_type_node, gfc_charlen_type_node,
+	pchar4_type_node);
+  TREE_NOTHROW (gfor_fndecl_adjustr_char4) = 1;
+
+  gfor_fndecl_select_string_char4 = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("select_string_char4")), ".R.R.",
+	integer_type_node, 4, pvoid_type_node, integer_type_node,
+	pvoid_type_node, gfc_charlen_type_node);
+  DECL_PURE_P (gfor_fndecl_select_string_char4) = 1;
+  TREE_NOTHROW (gfor_fndecl_select_string_char4) = 1;
+
+
+  /* Conversion between character kinds.  */
+
+  gfor_fndecl_convert_char1_to_char4 = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("convert_char1_to_char4")), ".w.R",
+	void_type_node, 3, build_pointer_type (pchar4_type_node),
+	gfc_charlen_type_node, pchar1_type_node);
+
+  gfor_fndecl_convert_char4_to_char1 = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("convert_char4_to_char1")), ".w.R",
+	void_type_node, 3, build_pointer_type (pchar1_type_node),
+	gfc_charlen_type_node, pchar4_type_node);
+
+  /* Misc. functions.  */
+
+  gfor_fndecl_ttynam = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("ttynam")), ".W",
+	void_type_node, 3, pchar_type_node, gfc_charlen_type_node,
+	integer_type_node);
+
+  gfor_fndecl_fdate = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("fdate")), ".W",
+	void_type_node, 2, pchar_type_node, gfc_charlen_type_node);
+
+  gfor_fndecl_ctime = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("ctime")), ".W",
+	void_type_node, 3, pchar_type_node, gfc_charlen_type_node,
+	gfc_int8_type_node);
+
+  gfor_fndecl_sc_kind = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("selected_char_kind")), "..R",
+	gfc_int4_type_node, 2, gfc_charlen_type_node, pchar_type_node);
+  DECL_PURE_P (gfor_fndecl_sc_kind) = 1;
+  TREE_NOTHROW (gfor_fndecl_sc_kind) = 1;
+
+  gfor_fndecl_si_kind = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("selected_int_kind")), ".R",
+	gfc_int4_type_node, 1, pvoid_type_node);
+  DECL_PURE_P (gfor_fndecl_si_kind) = 1;
+  TREE_NOTHROW (gfor_fndecl_si_kind) = 1;
+
+  gfor_fndecl_sr_kind = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("selected_real_kind2008")), ".RR",
+	gfc_int4_type_node, 3, pvoid_type_node, pvoid_type_node,
+	pvoid_type_node);
+  DECL_PURE_P (gfor_fndecl_sr_kind) = 1;
+  TREE_NOTHROW (gfor_fndecl_sr_kind) = 1;
+
+  gfor_fndecl_system_clock4 = gfc_build_library_function_decl (
+	get_identifier (PREFIX("system_clock_4")),
+	void_type_node, 3, gfc_pint4_type_node, gfc_pint4_type_node,
+	gfc_pint4_type_node);
+
+  gfor_fndecl_system_clock8 = gfc_build_library_function_decl (
+	get_identifier (PREFIX("system_clock_8")),
+	void_type_node, 3, gfc_pint8_type_node, gfc_pint8_type_node,
+	gfc_pint8_type_node);
+
+  /* Power functions.  */
+  {
+    tree ctype, rtype, itype, jtype;
+    int rkind, ikind, jkind;
+#define NIKINDS 3
+#define NRKINDS 4
+    static int ikinds[NIKINDS] = {4, 8, 16};
+    static int rkinds[NRKINDS] = {4, 8, 10, 16};
+    char name[PREFIX_LEN + 12]; /* _gfortran_pow_?n_?n */
+
+    for (ikind=0; ikind < NIKINDS; ikind++)
+      {
+	itype = gfc_get_int_type (ikinds[ikind]);
+
+	for (jkind=0; jkind < NIKINDS; jkind++)
+	  {
+	    jtype = gfc_get_int_type (ikinds[jkind]);
+	    if (itype && jtype)
+	      {
+		sprintf(name, PREFIX("pow_i%d_i%d"), ikinds[ikind],
+			ikinds[jkind]);
+		gfor_fndecl_math_powi[jkind][ikind].integer =
+		  gfc_build_library_function_decl (get_identifier (name),
+		    jtype, 2, jtype, itype);
+		TREE_READONLY (gfor_fndecl_math_powi[jkind][ikind].integer) = 1;
+		TREE_NOTHROW (gfor_fndecl_math_powi[jkind][ikind].integer) = 1;
+	      }
+	  }
+
+	for (rkind = 0; rkind < NRKINDS; rkind ++)
+	  {
+	    rtype = gfc_get_real_type (rkinds[rkind]);
+	    if (rtype && itype)
+	      {
+		sprintf(name, PREFIX("pow_r%d_i%d"), rkinds[rkind],
+			ikinds[ikind]);
+		gfor_fndecl_math_powi[rkind][ikind].real =
+		  gfc_build_library_function_decl (get_identifier (name),
+		    rtype, 2, rtype, itype);
+		TREE_READONLY (gfor_fndecl_math_powi[rkind][ikind].real) = 1;
+		TREE_NOTHROW (gfor_fndecl_math_powi[rkind][ikind].real) = 1;
+	      }
+
+	    ctype = gfc_get_complex_type (rkinds[rkind]);
+	    if (ctype && itype)
+	      {
+		sprintf(name, PREFIX("pow_c%d_i%d"), rkinds[rkind],
+			ikinds[ikind]);
+		gfor_fndecl_math_powi[rkind][ikind].cmplx =
+		  gfc_build_library_function_decl (get_identifier (name),
+		    ctype, 2,ctype, itype);
+		TREE_READONLY (gfor_fndecl_math_powi[rkind][ikind].cmplx) = 1;
+		TREE_NOTHROW (gfor_fndecl_math_powi[rkind][ikind].cmplx) = 1;
+	      }
+	  }
+      }
+#undef NIKINDS
+#undef NRKINDS
+  }
+
+  gfor_fndecl_math_ishftc4 = gfc_build_library_function_decl (
+	get_identifier (PREFIX("ishftc4")),
+	gfc_int4_type_node, 3, gfc_int4_type_node, gfc_int4_type_node,
+	gfc_int4_type_node);
+  TREE_READONLY (gfor_fndecl_math_ishftc4) = 1;
+  TREE_NOTHROW (gfor_fndecl_math_ishftc4) = 1;
+
+  gfor_fndecl_math_ishftc8 = gfc_build_library_function_decl (
+	get_identifier (PREFIX("ishftc8")),
+	gfc_int8_type_node, 3, gfc_int8_type_node, gfc_int4_type_node,
+	gfc_int4_type_node);
+  TREE_READONLY (gfor_fndecl_math_ishftc8) = 1;
+  TREE_NOTHROW (gfor_fndecl_math_ishftc8) = 1;
+
+  if (gfc_int16_type_node)
+    {
+      gfor_fndecl_math_ishftc16 = gfc_build_library_function_decl (
+	get_identifier (PREFIX("ishftc16")),
+	gfc_int16_type_node, 3, gfc_int16_type_node, gfc_int4_type_node,
+	gfc_int4_type_node);
+      TREE_READONLY (gfor_fndecl_math_ishftc16) = 1;
+      TREE_NOTHROW (gfor_fndecl_math_ishftc16) = 1;
+    }
+
+  /* BLAS functions.  */
+  {
+    tree pint = build_pointer_type (integer_type_node);
+    tree ps = build_pointer_type (gfc_get_real_type (gfc_default_real_kind));
+    tree pd = build_pointer_type (gfc_get_real_type (gfc_default_double_kind));
+    tree pc = build_pointer_type (gfc_get_complex_type (gfc_default_real_kind));
+    tree pz = build_pointer_type
+		(gfc_get_complex_type (gfc_default_double_kind));
+
+    gfor_fndecl_sgemm = gfc_build_library_function_decl
+			  (get_identifier
+			     (flag_underscoring ? "sgemm_" : "sgemm"),
+			   void_type_node, 15, pchar_type_node,
+			   pchar_type_node, pint, pint, pint, ps, ps, pint,
+			   ps, pint, ps, ps, pint, integer_type_node,
+			   integer_type_node);
+    gfor_fndecl_dgemm = gfc_build_library_function_decl
+			  (get_identifier
+			     (flag_underscoring ? "dgemm_" : "dgemm"),
+			   void_type_node, 15, pchar_type_node,
+			   pchar_type_node, pint, pint, pint, pd, pd, pint,
+			   pd, pint, pd, pd, pint, integer_type_node,
+			   integer_type_node);
+    gfor_fndecl_cgemm = gfc_build_library_function_decl
+			  (get_identifier
+			     (flag_underscoring ? "cgemm_" : "cgemm"),
+			   void_type_node, 15, pchar_type_node,
+			   pchar_type_node, pint, pint, pint, pc, pc, pint,
+			   pc, pint, pc, pc, pint, integer_type_node,
+			   integer_type_node);
+    gfor_fndecl_zgemm = gfc_build_library_function_decl
+			  (get_identifier
+			     (flag_underscoring ? "zgemm_" : "zgemm"),
+			   void_type_node, 15, pchar_type_node,
+			   pchar_type_node, pint, pint, pint, pz, pz, pint,
+			   pz, pint, pz, pz, pint, integer_type_node,
+			   integer_type_node);
+  }
+
+  /* Other functions.  */
+  gfor_fndecl_size0 = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("size0")), ".R",
+	gfc_array_index_type, 1, pvoid_type_node);
+  DECL_PURE_P (gfor_fndecl_size0) = 1;
+  TREE_NOTHROW (gfor_fndecl_size0) = 1;
+
+  gfor_fndecl_size1 = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("size1")), ".R",
+	gfc_array_index_type, 2, pvoid_type_node, gfc_array_index_type);
+  DECL_PURE_P (gfor_fndecl_size1) = 1;
+  TREE_NOTHROW (gfor_fndecl_size1) = 1;
+
+  gfor_fndecl_iargc = gfc_build_library_function_decl (
+	get_identifier (PREFIX ("iargc")), gfc_int4_type_node, 0);
+  TREE_NOTHROW (gfor_fndecl_iargc) = 1;
+}
+
+
+/* Make prototypes for runtime library functions.  */
+
+void
+gfc_build_builtin_function_decls (void)
+{
+  tree gfc_int4_type_node = gfc_get_int_type (4);
+
+  gfor_fndecl_stop_numeric = gfc_build_library_function_decl (
+	get_identifier (PREFIX("stop_numeric")),
+	void_type_node, 1, gfc_int4_type_node);
+  /* STOP doesn't return.  */
+  TREE_THIS_VOLATILE (gfor_fndecl_stop_numeric) = 1;
+
+  gfor_fndecl_stop_string = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("stop_string")), ".R.",
+	void_type_node, 2, pchar_type_node, gfc_int4_type_node);
+  /* STOP doesn't return.  */
+  TREE_THIS_VOLATILE (gfor_fndecl_stop_string) = 1;
+
+  gfor_fndecl_error_stop_numeric = gfc_build_library_function_decl (
+        get_identifier (PREFIX("error_stop_numeric")),
+        void_type_node, 1, gfc_int4_type_node);
+  /* ERROR STOP doesn't return.  */
+  TREE_THIS_VOLATILE (gfor_fndecl_error_stop_numeric) = 1;
+
+  gfor_fndecl_error_stop_string = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("error_stop_string")), ".R.",
+	void_type_node, 2, pchar_type_node, gfc_int4_type_node);
+  /* ERROR STOP doesn't return.  */
+  TREE_THIS_VOLATILE (gfor_fndecl_error_stop_string) = 1;
+
+  gfor_fndecl_pause_numeric = gfc_build_library_function_decl (
+	get_identifier (PREFIX("pause_numeric")),
+	void_type_node, 1, gfc_int4_type_node);
+
+  gfor_fndecl_pause_string = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("pause_string")), ".R.",
+	void_type_node, 2, pchar_type_node, gfc_int4_type_node);
+
+  gfor_fndecl_runtime_error = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("runtime_error")), ".R",
+	void_type_node, -1, pchar_type_node);
+  /* The runtime_error function does not return.  */
+  TREE_THIS_VOLATILE (gfor_fndecl_runtime_error) = 1;
+
+  gfor_fndecl_runtime_error_at = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("runtime_error_at")), ".RR",
+	void_type_node, -2, pchar_type_node, pchar_type_node);
+  /* The runtime_error_at function does not return.  */
+  TREE_THIS_VOLATILE (gfor_fndecl_runtime_error_at) = 1;
+
+  gfor_fndecl_runtime_warning_at = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("runtime_warning_at")), ".RR",
+	void_type_node, -2, pchar_type_node, pchar_type_node);
+
+  gfor_fndecl_generate_error = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("generate_error")), ".R.R",
+	void_type_node, 3, pvoid_type_node, integer_type_node,
+	pchar_type_node);
+
+  gfor_fndecl_os_error = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("os_error")), ".R",
+	void_type_node, 1, pchar_type_node);
+  /* The runtime_error function does not return.  */
+  TREE_THIS_VOLATILE (gfor_fndecl_os_error) = 1;
+
+  gfor_fndecl_set_args = gfc_build_library_function_decl (
+	get_identifier (PREFIX("set_args")),
+	void_type_node, 2, integer_type_node,
+	build_pointer_type (pchar_type_node));
+
+  gfor_fndecl_set_fpe = gfc_build_library_function_decl (
+	get_identifier (PREFIX("set_fpe")),
+	void_type_node, 1, integer_type_node);
+
+  gfor_fndecl_ieee_procedure_entry = gfc_build_library_function_decl (
+	get_identifier (PREFIX("ieee_procedure_entry")),
+	void_type_node, 1, pvoid_type_node);
+
+  gfor_fndecl_ieee_procedure_exit = gfc_build_library_function_decl (
+	get_identifier (PREFIX("ieee_procedure_exit")),
+	void_type_node, 1, pvoid_type_node);
+
+  /* Keep the array dimension in sync with the call, later in this file.  */
+  gfor_fndecl_set_options = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("set_options")), "..R",
+	void_type_node, 2, integer_type_node,
+	build_pointer_type (integer_type_node));
+
+  gfor_fndecl_set_convert = gfc_build_library_function_decl (
+	get_identifier (PREFIX("set_convert")),
+	void_type_node, 1, integer_type_node);
+
+  gfor_fndecl_set_record_marker = gfc_build_library_function_decl (
+	get_identifier (PREFIX("set_record_marker")),
+	void_type_node, 1, integer_type_node);
+
+  gfor_fndecl_set_max_subrecord_length = gfc_build_library_function_decl (
+	get_identifier (PREFIX("set_max_subrecord_length")),
+	void_type_node, 1, integer_type_node);
+
+  gfor_fndecl_in_pack = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("internal_pack")), ".r",
+	pvoid_type_node, 1, pvoid_type_node);
+
+  gfor_fndecl_in_unpack = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("internal_unpack")), ".wR",
+	void_type_node, 2, pvoid_type_node, pvoid_type_node);
+
+  gfor_fndecl_associated = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("associated")), ".RR",
+	integer_type_node, 2, ppvoid_type_node, ppvoid_type_node);
+  DECL_PURE_P (gfor_fndecl_associated) = 1;
+  TREE_NOTHROW (gfor_fndecl_associated) = 1;
+
+  /* Coarray library calls.  */
+  if (flag_coarray == GFC_FCOARRAY_LIB)
+    {
+      tree pint_type, pppchar_type;
+
+      pint_type = build_pointer_type (integer_type_node);
+      pppchar_type
+	= build_pointer_type (build_pointer_type (pchar_type_node));
+
+      gfor_fndecl_caf_init = gfc_build_library_function_decl (
+	get_identifier (PREFIX("caf_init")), void_type_node,
+	2, pint_type, pppchar_type);
+
+      gfor_fndecl_caf_finalize = gfc_build_library_function_decl (
+	get_identifier (PREFIX("caf_finalize")), void_type_node, 0);
+
+      gfor_fndecl_caf_this_image = gfc_build_library_function_decl (
+	get_identifier (PREFIX("caf_this_image")), integer_type_node,
+	1, integer_type_node);
+
+      gfor_fndecl_caf_num_images = gfc_build_library_function_decl (
+	get_identifier (PREFIX("caf_num_images")), integer_type_node,
+	2, integer_type_node, integer_type_node);
+
+      gfor_fndecl_caf_register = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("caf_register")), "RRWWWWR", void_type_node, 7,
+	size_type_node, integer_type_node, ppvoid_type_node, pvoid_type_node,
+	pint_type, pchar_type_node, integer_type_node);
+
+      gfor_fndecl_caf_deregister = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("caf_deregister")), "WRWWR", void_type_node, 5,
+	ppvoid_type_node, integer_type_node, pint_type, pchar_type_node,
+	integer_type_node);
+
+      gfor_fndecl_caf_get = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("caf_get")), ".R.RRWRRRW", void_type_node, 10,
+	pvoid_type_node, size_type_node, integer_type_node, pvoid_type_node,
+	pvoid_type_node, pvoid_type_node, integer_type_node, integer_type_node,
+	boolean_type_node, pint_type);
+
+      gfor_fndecl_caf_send = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("caf_send")), ".R.RRRRRRW", void_type_node, 10,
+	pvoid_type_node, size_type_node, integer_type_node, pvoid_type_node,
+	pvoid_type_node, pvoid_type_node, integer_type_node, integer_type_node,
+	boolean_type_node, pint_type);
+
+      gfor_fndecl_caf_sendget = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("caf_sendget")), ".R.RRRR.RRRRRR",
+	void_type_node,	14, pvoid_type_node, size_type_node, integer_type_node,
+	pvoid_type_node, pvoid_type_node, pvoid_type_node, size_type_node,
+	integer_type_node, pvoid_type_node, pvoid_type_node, integer_type_node,
+	integer_type_node, boolean_type_node, integer_type_node);
+
+      gfor_fndecl_caf_get_by_ref = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("caf_get_by_ref")), ".RWRRRRRW", void_type_node,
+	9, pvoid_type_node, integer_type_node, pvoid_type_node, pvoid_type_node,
+	integer_type_node, integer_type_node, boolean_type_node,
+	boolean_type_node, pint_type);
+
+      gfor_fndecl_caf_send_by_ref = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("caf_send_by_ref")), ".RRRRRRRW", void_type_node,
+	9, pvoid_type_node, integer_type_node, pvoid_type_node, pvoid_type_node,
+	integer_type_node, integer_type_node, boolean_type_node,
+	boolean_type_node, pint_type);
+
+      gfor_fndecl_caf_sendget_by_ref
+	  = gfc_build_library_function_decl_with_spec (
+	    get_identifier (PREFIX("caf_sendget_by_ref")), ".RR.RRRRRWW",
+	    void_type_node, 11, pvoid_type_node, integer_type_node,
+	    pvoid_type_node, pvoid_type_node, integer_type_node,
+	    pvoid_type_node, integer_type_node, integer_type_node,
+	    boolean_type_node, pint_type, pint_type);
+
+      gfor_fndecl_caf_sync_all = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("caf_sync_all")), ".WW", void_type_node,
+	3, pint_type, pchar_type_node, integer_type_node);
+
+      gfor_fndecl_caf_sync_memory = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("caf_sync_memory")), ".WW", void_type_node,
+	3, pint_type, pchar_type_node, integer_type_node);
+
+      gfor_fndecl_caf_sync_images = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("caf_sync_images")), ".RRWW", void_type_node,
+	5, integer_type_node, pint_type, pint_type,
+	pchar_type_node, integer_type_node);
+
+      gfor_fndecl_caf_error_stop = gfc_build_library_function_decl (
+	get_identifier (PREFIX("caf_error_stop")),
+	void_type_node, 1, gfc_int4_type_node);
+      /* CAF's ERROR STOP doesn't return.  */
+      TREE_THIS_VOLATILE (gfor_fndecl_caf_error_stop) = 1;
+
+      gfor_fndecl_caf_error_stop_str = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("caf_error_stop_str")), ".R.",
+	void_type_node, 2, pchar_type_node, gfc_int4_type_node);
+      /* CAF's ERROR STOP doesn't return.  */
+      TREE_THIS_VOLATILE (gfor_fndecl_caf_error_stop_str) = 1;
+
+      gfor_fndecl_caf_stop_numeric = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("caf_stop_numeric")), ".R.",
+	void_type_node, 1, gfc_int4_type_node);
+      /* CAF's STOP doesn't return.  */
+      TREE_THIS_VOLATILE (gfor_fndecl_caf_stop_numeric) = 1;
+
+      gfor_fndecl_caf_stop_str = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("caf_stop_str")), ".R.",
+	void_type_node, 2, pchar_type_node, gfc_int4_type_node);
+      /* CAF's STOP doesn't return.  */
+      TREE_THIS_VOLATILE (gfor_fndecl_caf_stop_str) = 1;
+
+      gfor_fndecl_caf_atomic_def = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("caf_atomic_define")), "R..RW",
+	void_type_node, 7, pvoid_type_node, size_type_node, integer_type_node,
+	pvoid_type_node, pint_type, integer_type_node, integer_type_node);
+
+      gfor_fndecl_caf_atomic_ref = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("caf_atomic_ref")), "R..WW",
+	void_type_node, 7, pvoid_type_node, size_type_node, integer_type_node,
+	pvoid_type_node, pint_type, integer_type_node, integer_type_node);
+
+      gfor_fndecl_caf_atomic_cas = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("caf_atomic_cas")), "R..WRRW",
+	void_type_node, 9, pvoid_type_node, size_type_node, integer_type_node,
+	pvoid_type_node, pvoid_type_node, pvoid_type_node, pint_type,
+	integer_type_node, integer_type_node);
+
+      gfor_fndecl_caf_atomic_op = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("caf_atomic_op")), ".R..RWW",
+	void_type_node, 9, integer_type_node, pvoid_type_node, size_type_node,
+	integer_type_node, pvoid_type_node, pvoid_type_node, pint_type,
+	integer_type_node, integer_type_node);
+
+      gfor_fndecl_caf_lock = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("caf_lock")), "R..WWW",
+	void_type_node, 7, pvoid_type_node, size_type_node, integer_type_node,
+	pint_type, pint_type, pchar_type_node, integer_type_node);
+
+      gfor_fndecl_caf_unlock = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("caf_unlock")), "R..WW",
+	void_type_node, 6, pvoid_type_node, size_type_node, integer_type_node,
+	pint_type, pchar_type_node, integer_type_node);
+
+      gfor_fndecl_caf_event_post = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("caf_event_post")), "R..WW",
+	void_type_node, 6, pvoid_type_node, size_type_node, integer_type_node,
+	pint_type, pchar_type_node, integer_type_node);
+
+      gfor_fndecl_caf_event_wait = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("caf_event_wait")), "R..WW",
+	void_type_node, 6, pvoid_type_node, size_type_node, integer_type_node,
+	pint_type, pchar_type_node, integer_type_node);
+
+      gfor_fndecl_caf_event_query = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("caf_event_query")), "R..WW",
+	void_type_node, 5, pvoid_type_node, size_type_node, integer_type_node,
+	pint_type, pint_type);
+
+      gfor_fndecl_caf_fail_image = gfc_build_library_function_decl (
+	get_identifier (PREFIX("caf_fail_image")), void_type_node, 0);
+      /* CAF's FAIL doesn't return.  */
+      TREE_THIS_VOLATILE (gfor_fndecl_caf_fail_image) = 1;
+
+      gfor_fndecl_caf_failed_images
+	= gfc_build_library_function_decl_with_spec (
+	    get_identifier (PREFIX("caf_failed_images")), "WRR",
+	    void_type_node, 3, pvoid_type_node, ppvoid_type_node,
+	    integer_type_node);
+
+      gfor_fndecl_caf_image_status
+	= gfc_build_library_function_decl_with_spec (
+	    get_identifier (PREFIX("caf_image_status")), "RR",
+	    integer_type_node, 2, integer_type_node, ppvoid_type_node);
+
+      gfor_fndecl_caf_stopped_images
+	= gfc_build_library_function_decl_with_spec (
+	    get_identifier (PREFIX("caf_stopped_images")), "WRR",
+	    void_type_node, 3, pvoid_type_node, ppvoid_type_node,
+	    integer_type_node);
+
+      gfor_fndecl_co_broadcast = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("caf_co_broadcast")), "W.WW",
+	void_type_node, 5, pvoid_type_node, integer_type_node,
+	pint_type, pchar_type_node, integer_type_node);
+
+      gfor_fndecl_co_max = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("caf_co_max")), "W.WW",
+	void_type_node, 6, pvoid_type_node, integer_type_node,
+	pint_type, pchar_type_node, integer_type_node, integer_type_node);
+
+      gfor_fndecl_co_min = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("caf_co_min")), "W.WW",
+	void_type_node, 6, pvoid_type_node, integer_type_node,
+	pint_type, pchar_type_node, integer_type_node, integer_type_node);
+
+      gfor_fndecl_co_reduce = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("caf_co_reduce")), "W.R.WW",
+	void_type_node, 8, pvoid_type_node,
+	build_pointer_type (build_varargs_function_type_list (void_type_node,
+							      NULL_TREE)),
+	integer_type_node, integer_type_node, pint_type, pchar_type_node,
+	integer_type_node, integer_type_node);
+
+      gfor_fndecl_co_sum = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("caf_co_sum")), "W.WW",
+	void_type_node, 5, pvoid_type_node, integer_type_node,
+	pint_type, pchar_type_node, integer_type_node);
+
+      gfor_fndecl_caf_is_present = gfc_build_library_function_decl_with_spec (
+	get_identifier (PREFIX("caf_is_present")), "RRR",
+	integer_type_node, 3, pvoid_type_node, integer_type_node,
+	pvoid_type_node);
+    }
+
+  gfc_build_intrinsic_function_decls ();
+  gfc_build_intrinsic_lib_fndecls ();
+  gfc_build_io_library_fndecls ();
+}
+
+
+/* Evaluate the length of dummy character variables.  */
+
+static void
+gfc_trans_dummy_character (gfc_symbol *sym, gfc_charlen *cl,
+			   gfc_wrapped_block *block)
+{
+  stmtblock_t init;
+
+  gfc_finish_decl (cl->backend_decl);
+
+  gfc_start_block (&init);
+
+  /* Evaluate the string length expression.  */
+  gfc_conv_string_length (cl, NULL, &init);
+
+  gfc_trans_vla_type_sizes (sym, &init);
+
+  gfc_add_init_cleanup (block, gfc_finish_block (&init), NULL_TREE);
+}
+
+
+/* Allocate and cleanup an automatic character variable.  */
+
+static void
+gfc_trans_auto_character_variable (gfc_symbol * sym, gfc_wrapped_block * block)
+{
+  stmtblock_t init;
+  tree decl;
+  tree tmp;
+
+  gcc_assert (sym->backend_decl);
+  gcc_assert (sym->ts.u.cl && sym->ts.u.cl->length);
+
+  gfc_init_block (&init);
+
+  /* Evaluate the string length expression.  */
+  gfc_conv_string_length (sym->ts.u.cl, NULL, &init);
+
+  gfc_trans_vla_type_sizes (sym, &init);
+
+  decl = sym->backend_decl;
+
+  /* Emit a DECL_EXPR for this variable, which will cause the
+     gimplifier to allocate storage, and all that good stuff.  */
+  tmp = fold_build1_loc (input_location, DECL_EXPR, TREE_TYPE (decl), decl);
+  gfc_add_expr_to_block (&init, tmp);
+
+  gfc_add_init_cleanup (block, gfc_finish_block (&init), NULL_TREE);
+}
+
+/* Set the initial value of ASSIGN statement auxiliary variable explicitly.  */
+
+static void
+gfc_trans_assign_aux_var (gfc_symbol * sym, gfc_wrapped_block * block)
+{
+  stmtblock_t init;
+
+  gcc_assert (sym->backend_decl);
+  gfc_start_block (&init);
+
+  /* Set the initial value to length. See the comments in
+     function gfc_add_assign_aux_vars in this file.  */
+  gfc_add_modify (&init, GFC_DECL_STRING_LEN (sym->backend_decl),
+		  build_int_cst (gfc_charlen_type_node, -2));
+
+  gfc_add_init_cleanup (block, gfc_finish_block (&init), NULL_TREE);
+}
+
+static void
+gfc_trans_vla_one_sizepos (tree *tp, stmtblock_t *body)
+{
+  tree t = *tp, var, val;
+
+  if (t == NULL || t == error_mark_node)
+    return;
+  if (TREE_CONSTANT (t) || DECL_P (t))
+    return;
+
+  if (TREE_CODE (t) == SAVE_EXPR)
+    {
+      if (SAVE_EXPR_RESOLVED_P (t))
+	{
+	  *tp = TREE_OPERAND (t, 0);
+	  return;
+	}
+      val = TREE_OPERAND (t, 0);
+    }
+  else
+    val = t;
+
+  var = gfc_create_var_np (TREE_TYPE (t), NULL);
+  gfc_add_decl_to_function (var);
+  gfc_add_modify (body, var, unshare_expr (val));
+  if (TREE_CODE (t) == SAVE_EXPR)
+    TREE_OPERAND (t, 0) = var;
+  *tp = var;
+}
+
+static void
+gfc_trans_vla_type_sizes_1 (tree type, stmtblock_t *body)
+{
+  tree t;
+
+  if (type == NULL || type == error_mark_node)
+    return;
+
+  type = TYPE_MAIN_VARIANT (type);
+
+  if (TREE_CODE (type) == INTEGER_TYPE)
+    {
+      gfc_trans_vla_one_sizepos (&TYPE_MIN_VALUE (type), body);
+      gfc_trans_vla_one_sizepos (&TYPE_MAX_VALUE (type), body);
+
+      for (t = TYPE_NEXT_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
+	{
+	  TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (type);
+	  TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (type);
+	}
+    }
+  else if (TREE_CODE (type) == ARRAY_TYPE)
+    {
+      gfc_trans_vla_type_sizes_1 (TREE_TYPE (type), body);
+      gfc_trans_vla_type_sizes_1 (TYPE_DOMAIN (type), body);
+      gfc_trans_vla_one_sizepos (&TYPE_SIZE (type), body);
+      gfc_trans_vla_one_sizepos (&TYPE_SIZE_UNIT (type), body);
+
+      for (t = TYPE_NEXT_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
+	{
+	  TYPE_SIZE (t) = TYPE_SIZE (type);
+	  TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (type);
+	}
+    }
+}
+
+/* Make sure all type sizes and array domains are either constant,
+   or variable or parameter decls.  This is a simplified variant
+   of gimplify_type_sizes, but we can't use it here, as none of the
+   variables in the expressions have been gimplified yet.
+   As type sizes and domains for various variable length arrays
+   contain VAR_DECLs that are only initialized at gfc_trans_deferred_vars
+   time, without this routine gimplify_type_sizes in the middle-end
+   could result in the type sizes being gimplified earlier than where
+   those variables are initialized.  */
+
+void
+gfc_trans_vla_type_sizes (gfc_symbol *sym, stmtblock_t *body)
+{
+  tree type = TREE_TYPE (sym->backend_decl);
+
+  if (TREE_CODE (type) == FUNCTION_TYPE
+      && (sym->attr.function || sym->attr.result || sym->attr.entry))
+    {
+      if (! current_fake_result_decl)
+	return;
+
+      type = TREE_TYPE (TREE_VALUE (current_fake_result_decl));
+    }
+
+  while (POINTER_TYPE_P (type))
+    type = TREE_TYPE (type);
+
+  if (GFC_DESCRIPTOR_TYPE_P (type))
+    {
+      tree etype = GFC_TYPE_ARRAY_DATAPTR_TYPE (type);
+
+      while (POINTER_TYPE_P (etype))
+	etype = TREE_TYPE (etype);
+
+      gfc_trans_vla_type_sizes_1 (etype, body);
+    }
+
+  gfc_trans_vla_type_sizes_1 (type, body);
+}
+
+
+/* Initialize a derived type by building an lvalue from the symbol
+   and using trans_assignment to do the work. Set dealloc to false
+   if no deallocation prior the assignment is needed.  */
+void
+gfc_init_default_dt (gfc_symbol * sym, stmtblock_t * block, bool dealloc)
+{
+  gfc_expr *e;
+  tree tmp;
+  tree present;
+
+  gcc_assert (block);
+
+  gcc_assert (!sym->attr.allocatable);
+  gfc_set_sym_referenced (sym);
+  e = gfc_lval_expr_from_sym (sym);
+  tmp = gfc_trans_assignment (e, sym->value, false, dealloc);
+  if (sym->attr.dummy && (sym->attr.optional
+			  || sym->ns->proc_name->attr.entry_master))
+    {
+      present = gfc_conv_expr_present (sym);
+      tmp = build3_loc (input_location, COND_EXPR, TREE_TYPE (tmp), present,
+			tmp, build_empty_stmt (input_location));
+    }
+  gfc_add_expr_to_block (block, tmp);
+  gfc_free_expr (e);
+}
+
+
+/* Initialize INTENT(OUT) derived type dummies.  As well as giving
+   them their default initializer, if they do not have allocatable
+   components, they have their allocatable components deallocated.  */
+
+static void
+init_intent_out_dt (gfc_symbol * proc_sym, gfc_wrapped_block * block)
+{
+  stmtblock_t init;
+  gfc_formal_arglist *f;
+  tree tmp;
+  tree present;
+
+  gfc_init_block (&init);
+  for (f = gfc_sym_get_dummy_args (proc_sym); f; f = f->next)
+    if (f->sym && f->sym->attr.intent == INTENT_OUT
+	&& !f->sym->attr.pointer
+	&& f->sym->ts.type == BT_DERIVED)
+      {
+	tmp = NULL_TREE;
+
+	/* Note: Allocatables are excluded as they are already handled
+	   by the caller.  */
+	if (!f->sym->attr.allocatable
+	    && gfc_is_finalizable (f->sym->ts.u.derived, NULL))
+	  {
+	    stmtblock_t block;
+	    gfc_expr *e;
+
+	    gfc_init_block (&block);
+	    f->sym->attr.referenced = 1;
+	    e = gfc_lval_expr_from_sym (f->sym);
+	    gfc_add_finalizer_call (&block, e);
+	    gfc_free_expr (e);
+	    tmp = gfc_finish_block (&block);
+	  }
+
+	if (tmp == NULL_TREE && !f->sym->attr.allocatable
+	    && f->sym->ts.u.derived->attr.alloc_comp && !f->sym->value)
+	  tmp = gfc_deallocate_alloc_comp (f->sym->ts.u.derived,
+					   f->sym->backend_decl,
+					   f->sym->as ? f->sym->as->rank : 0);
+
+	if (tmp != NULL_TREE && (f->sym->attr.optional
+				 || f->sym->ns->proc_name->attr.entry_master))
+	  {
+	    present = gfc_conv_expr_present (f->sym);
+	    tmp = build3_loc (input_location, COND_EXPR, TREE_TYPE (tmp),
+			      present, tmp, build_empty_stmt (input_location));
+	  }
+
+	if (tmp != NULL_TREE)
+	  gfc_add_expr_to_block (&init, tmp);
+	else if (f->sym->value && !f->sym->attr.allocatable)
+	  gfc_init_default_dt (f->sym, &init, true);
+      }
+    else if (f->sym && f->sym->attr.intent == INTENT_OUT
+	     && f->sym->ts.type == BT_CLASS
+	     && !CLASS_DATA (f->sym)->attr.class_pointer
+	     && !CLASS_DATA (f->sym)->attr.allocatable)
+      {
+	stmtblock_t block;
+	gfc_expr *e;
+
+	gfc_init_block (&block);
+	f->sym->attr.referenced = 1;
+	e = gfc_lval_expr_from_sym (f->sym);
+	gfc_add_finalizer_call (&block, e);
+	gfc_free_expr (e);
+	tmp = gfc_finish_block (&block);
+
+	if (f->sym->attr.optional || f->sym->ns->proc_name->attr.entry_master)
+	  {
+	    present = gfc_conv_expr_present (f->sym);
+	    tmp = build3_loc (input_location, COND_EXPR, TREE_TYPE (tmp),
+			      present, tmp,
+			      build_empty_stmt (input_location));
+	  }
+
+	gfc_add_expr_to_block (&init, tmp);
+      }
+
+  gfc_add_init_cleanup (block, gfc_finish_block (&init), NULL_TREE);
+}
+
+
+/* Helper function to manage deferred string lengths.  */
+
+static tree
+gfc_null_and_pass_deferred_len (gfc_symbol *sym, stmtblock_t *init,
+			        locus *loc)
+{
+  tree tmp;
+
+  /* Character length passed by reference.  */
+  tmp = sym->ts.u.cl->passed_length;
+  tmp = build_fold_indirect_ref_loc (input_location, tmp);
+  tmp = fold_convert (gfc_charlen_type_node, tmp);
+
+  if (!sym->attr.dummy || sym->attr.intent == INTENT_OUT)
+    /* Zero the string length when entering the scope.  */
+    gfc_add_modify (init, sym->ts.u.cl->backend_decl,
+		    build_int_cst (gfc_charlen_type_node, 0));
+  else
+    {
+      tree tmp2;
+
+      tmp2 = fold_build2_loc (input_location, MODIFY_EXPR,
+			      gfc_charlen_type_node,
+			      sym->ts.u.cl->backend_decl, tmp);
+      if (sym->attr.optional)
+	{
+	  tree present = gfc_conv_expr_present (sym);
+	  tmp2 = build3_loc (input_location, COND_EXPR,
+			     void_type_node, present, tmp2,
+			     build_empty_stmt (input_location));
+	}
+      gfc_add_expr_to_block (init, tmp2);
+    }
+
+  gfc_restore_backend_locus (loc);
+
+  /* Pass the final character length back.  */
+  if (sym->attr.intent != INTENT_IN)
+    {
+      tmp = fold_build2_loc (input_location, MODIFY_EXPR,
+			     gfc_charlen_type_node, tmp,
+			     sym->ts.u.cl->backend_decl);
+      if (sym->attr.optional)
+	{
+	  tree present = gfc_conv_expr_present (sym);
+	  tmp = build3_loc (input_location, COND_EXPR,
+			    void_type_node, present, tmp,
+			    build_empty_stmt (input_location));
+	}
+    }
+  else
+    tmp = NULL_TREE;
+
+  return tmp;
+}
+
+/* Generate function entry and exit code, and add it to the function body.
+   This includes:
+    Allocation and initialization of array variables.
+    Allocation of character string variables.
+    Initialization and possibly repacking of dummy arrays.
+    Initialization of ASSIGN statement auxiliary variable.
+    Initialization of ASSOCIATE names.
+    Automatic deallocation.  */
+
+void
+gfc_trans_deferred_vars (gfc_symbol * proc_sym, gfc_wrapped_block * block)
+{
+  locus loc;
+  gfc_symbol *sym;
+  gfc_formal_arglist *f;
+  stmtblock_t tmpblock;
+  bool seen_trans_deferred_array = false;
+  bool is_pdt_type = false;
+  tree tmp = NULL;
+  gfc_expr *e;
+  gfc_se se;
+  stmtblock_t init;
+
+  /* Deal with implicit return variables.  Explicit return variables will
+     already have been added.  */
+  if (gfc_return_by_reference (proc_sym) && proc_sym->result == proc_sym)
+    {
+      if (!current_fake_result_decl)
+	{
+	  gfc_entry_list *el = NULL;
+	  if (proc_sym->attr.entry_master)
+	    {
+	      for (el = proc_sym->ns->entries; el; el = el->next)
+		if (el->sym != el->sym->result)
+		  break;
+	    }
+	  /* TODO: move to the appropriate place in resolve.c.  */
+	  if (warn_return_type && el == NULL)
+	    gfc_warning (OPT_Wreturn_type,
+			 "Return value of function %qs at %L not set",
+			 proc_sym->name, &proc_sym->declared_at);
+	}
+      else if (proc_sym->as)
+	{
+	  tree result = TREE_VALUE (current_fake_result_decl);
+	  gfc_save_backend_locus (&loc);
+	  gfc_set_backend_locus (&proc_sym->declared_at);
+	  gfc_trans_dummy_array_bias (proc_sym, result, block);
+
+	  /* An automatic character length, pointer array result.  */
+	  if (proc_sym->ts.type == BT_CHARACTER
+	      && VAR_P (proc_sym->ts.u.cl->backend_decl))
+	    {
+	      tmp = NULL;
+	      if (proc_sym->ts.deferred)
+		{
+		  gfc_start_block (&init);
+		  tmp = gfc_null_and_pass_deferred_len (proc_sym, &init, &loc);
+		  gfc_add_init_cleanup (block, gfc_finish_block (&init), tmp);
+		}
+	      else
+		gfc_trans_dummy_character (proc_sym, proc_sym->ts.u.cl, block);
+	    }
+	}
+      else if (proc_sym->ts.type == BT_CHARACTER)
+	{
+	  if (proc_sym->ts.deferred)
+	    {
+	      tmp = NULL;
+	      gfc_save_backend_locus (&loc);
+	      gfc_set_backend_locus (&proc_sym->declared_at);
+	      gfc_start_block (&init);
+	      /* Zero the string length on entry.  */
+	      gfc_add_modify (&init, proc_sym->ts.u.cl->backend_decl,
+			      build_int_cst (gfc_charlen_type_node, 0));
+	      /* Null the pointer.  */
+	      e = gfc_lval_expr_from_sym (proc_sym);
+	      gfc_init_se (&se, NULL);
+	      se.want_pointer = 1;
+	      gfc_conv_expr (&se, e);
+	      gfc_free_expr (e);
+	      tmp = se.expr;
+	      gfc_add_modify (&init, tmp,
+			      fold_convert (TREE_TYPE (se.expr),
+					    null_pointer_node));
+	      gfc_restore_backend_locus (&loc);
+
+	      /* Pass back the string length on exit.  */
+	      tmp = proc_sym->ts.u.cl->backend_decl;
+	      if (TREE_CODE (tmp) != INDIRECT_REF
+		  && proc_sym->ts.u.cl->passed_length)
+		{
+		  tmp = proc_sym->ts.u.cl->passed_length;
+		  tmp = build_fold_indirect_ref_loc (input_location, tmp);
+		  tmp = fold_convert (gfc_charlen_type_node, tmp);
+		  tmp = fold_build2_loc (input_location, MODIFY_EXPR,
+					 gfc_charlen_type_node, tmp,
+					 proc_sym->ts.u.cl->backend_decl);
+		}
+	      else
+		tmp = NULL_TREE;
+
+	      gfc_add_init_cleanup (block, gfc_finish_block (&init), tmp);
+	    }
+	  else if (VAR_P (proc_sym->ts.u.cl->backend_decl))
+	    gfc_trans_dummy_character (proc_sym, proc_sym->ts.u.cl, block);
+	}
+      else
+	gcc_assert (flag_f2c && proc_sym->ts.type == BT_COMPLEX);
+    }
+
+  /* Initialize the INTENT(OUT) derived type dummy arguments.  This
+     should be done here so that the offsets and lbounds of arrays
+     are available.  */
+  gfc_save_backend_locus (&loc);
+  gfc_set_backend_locus (&proc_sym->declared_at);
+  init_intent_out_dt (proc_sym, block);
+  gfc_restore_backend_locus (&loc);
+
+  for (sym = proc_sym->tlink; sym != proc_sym; sym = sym->tlink)
+    {
+      bool alloc_comp_or_fini = (sym->ts.type == BT_DERIVED)
+				&& (sym->ts.u.derived->attr.alloc_comp
+				    || gfc_is_finalizable (sym->ts.u.derived,
+							   NULL));
+      if (sym->assoc)
+	continue;
+
+      if (sym->ts.type == BT_DERIVED
+	  && sym->ts.u.derived
+	  && sym->ts.u.derived->attr.pdt_type)
+	{
+	  is_pdt_type = true;
+	  gfc_init_block (&tmpblock);
+	  if (!(sym->attr.dummy
+		|| sym->attr.pointer
+		|| sym->attr.allocatable))
+	    {
+	      tmp = gfc_allocate_pdt_comp (sym->ts.u.derived,
+					   sym->backend_decl,
+					   sym->as ? sym->as->rank : 0,
+					   sym->param_list);
+	      gfc_add_expr_to_block (&tmpblock, tmp);
+	      tmp = gfc_deallocate_pdt_comp (sym->ts.u.derived,
+					     sym->backend_decl,
+					     sym->as ? sym->as->rank : 0);
+	      gfc_add_init_cleanup (block, gfc_finish_block (&tmpblock), tmp);
+	    }
+	  else if (sym->attr.dummy)
+	    {
+	      tmp = gfc_check_pdt_dummy (sym->ts.u.derived,
+					 sym->backend_decl,
+					 sym->as ? sym->as->rank : 0,
+					 sym->param_list);
+	      gfc_add_expr_to_block (&tmpblock, tmp);
+	      gfc_add_init_cleanup (block, gfc_finish_block (&tmpblock), NULL);
+	    }
+	}
+      else if (sym->ts.type == BT_CLASS
+	       && CLASS_DATA (sym)->ts.u.derived
+	       && CLASS_DATA (sym)->ts.u.derived->attr.pdt_type)
+	{
+	  gfc_component *data = CLASS_DATA (sym);
+	  is_pdt_type = true;
+	  gfc_init_block (&tmpblock);
+	  if (!(sym->attr.dummy
+		|| CLASS_DATA (sym)->attr.pointer
+		|| CLASS_DATA (sym)->attr.allocatable))
+	    {
+	      tmp = gfc_class_data_get (sym->backend_decl);
+	      tmp = gfc_allocate_pdt_comp (data->ts.u.derived, tmp,
+					   data->as ? data->as->rank : 0,
+					   sym->param_list);
+	      gfc_add_expr_to_block (&tmpblock, tmp);
+	      tmp = gfc_class_data_get (sym->backend_decl);
+	      tmp = gfc_deallocate_pdt_comp (data->ts.u.derived, tmp,
+					     data->as ? data->as->rank : 0);
+	      gfc_add_init_cleanup (block, gfc_finish_block (&tmpblock), tmp);
+	    }
+	  else if (sym->attr.dummy)
+	    {
+	      tmp = gfc_class_data_get (sym->backend_decl);
+	      tmp = gfc_check_pdt_dummy (data->ts.u.derived, tmp,
+					 data->as ? data->as->rank : 0,
+					 sym->param_list);
+	      gfc_add_expr_to_block (&tmpblock, tmp);
+	      gfc_add_init_cleanup (block, gfc_finish_block (&tmpblock), NULL);
+	    }
+	}
+
+      if (sym->attr.pointer && sym->attr.dimension
+	  && sym->attr.save == SAVE_NONE
+	  && !sym->attr.use_assoc
+	  && !sym->attr.host_assoc
+	  && !sym->attr.dummy
+	  && GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (sym->backend_decl)))
+	{
+	  gfc_init_block (&tmpblock);
+	  gfc_conv_descriptor_span_set (&tmpblock, sym->backend_decl,
+				build_int_cst (gfc_array_index_type, 0));
+	  gfc_add_init_cleanup (block, gfc_finish_block (&tmpblock),
+				NULL_TREE);
+	}
+
+      if (sym->ts.type == BT_CLASS
+	  && (sym->attr.save || flag_max_stack_var_size == 0)
+	  && CLASS_DATA (sym)->attr.allocatable)
+	{
+	  tree vptr;
+
+          if (UNLIMITED_POLY (sym))
+	    vptr = null_pointer_node;
+	  else
+	    {
+	      gfc_symbol *vsym;
+	      vsym = gfc_find_derived_vtab (sym->ts.u.derived);
+	      vptr = gfc_get_symbol_decl (vsym);
+	      vptr = gfc_build_addr_expr (NULL, vptr);
+	    }
+
+	  if (CLASS_DATA (sym)->attr.dimension
+	      || (CLASS_DATA (sym)->attr.codimension
+		  && flag_coarray != GFC_FCOARRAY_LIB))
+	    {
+	      tmp = gfc_class_data_get (sym->backend_decl);
+	      tmp = gfc_build_null_descriptor (TREE_TYPE (tmp));
+	    }
+	  else
+	    tmp = null_pointer_node;
+
+	  DECL_INITIAL (sym->backend_decl)
+		= gfc_class_set_static_fields (sym->backend_decl, vptr, tmp);
+	  TREE_CONSTANT (DECL_INITIAL (sym->backend_decl)) = 1;
+	}
+      else if ((sym->attr.dimension || sym->attr.codimension
+	       || (IS_CLASS_ARRAY (sym) && !CLASS_DATA (sym)->attr.allocatable)))
+	{
+	  bool is_classarray = IS_CLASS_ARRAY (sym);
+	  symbol_attribute *array_attr;
+	  gfc_array_spec *as;
+	  array_type type_of_array;
+
+	  array_attr = is_classarray ? &CLASS_DATA (sym)->attr : &sym->attr;
+	  as = is_classarray ? CLASS_DATA (sym)->as : sym->as;
+	  /* Assumed-size Cray pointees need to be treated as AS_EXPLICIT.  */
+	  type_of_array = as->type;
+	  if (type_of_array == AS_ASSUMED_SIZE && as->cp_was_assumed)
+	    type_of_array = AS_EXPLICIT;
+	  switch (type_of_array)
+	    {
+	    case AS_EXPLICIT:
+	      if (sym->attr.dummy || sym->attr.result)
+		gfc_trans_dummy_array_bias (sym, sym->backend_decl, block);
+	      /* Allocatable and pointer arrays need to processed
+		 explicitly.  */
+	      else if ((sym->ts.type != BT_CLASS && sym->attr.pointer)
+		       || (sym->ts.type == BT_CLASS
+			   && CLASS_DATA (sym)->attr.class_pointer)
+		       || array_attr->allocatable)
+		{
+		  if (TREE_STATIC (sym->backend_decl))
+		    {
+		      gfc_save_backend_locus (&loc);
+		      gfc_set_backend_locus (&sym->declared_at);
+		      gfc_trans_static_array_pointer (sym);
+		      gfc_restore_backend_locus (&loc);
+		    }
+		  else
+		    {
+		      seen_trans_deferred_array = true;
+		      gfc_trans_deferred_array (sym, block);
+		    }
+		}
+	      else if (sym->attr.codimension
+		       && TREE_STATIC (sym->backend_decl))
+		{
+		  gfc_init_block (&tmpblock);
+		  gfc_trans_array_cobounds (TREE_TYPE (sym->backend_decl),
+					    &tmpblock, sym);
+		  gfc_add_init_cleanup (block, gfc_finish_block (&tmpblock),
+					NULL_TREE);
+		  continue;
+		}
+	      else
+		{
+		  gfc_save_backend_locus (&loc);
+		  gfc_set_backend_locus (&sym->declared_at);
+
+		  if (alloc_comp_or_fini)
+		    {
+		      seen_trans_deferred_array = true;
+		      gfc_trans_deferred_array (sym, block);
+		    }
+		  else if (sym->ts.type == BT_DERIVED
+			     && sym->value
+			     && !sym->attr.data
+			     && sym->attr.save == SAVE_NONE)
+		    {
+		      gfc_start_block (&tmpblock);
+		      gfc_init_default_dt (sym, &tmpblock, false);
+		      gfc_add_init_cleanup (block,
+					    gfc_finish_block (&tmpblock),
+					    NULL_TREE);
+		    }
+
+		  gfc_trans_auto_array_allocation (sym->backend_decl,
+						   sym, block);
+		  gfc_restore_backend_locus (&loc);
+		}
+	      break;
+
+	    case AS_ASSUMED_SIZE:
+	      /* Must be a dummy parameter.  */
+	      gcc_assert (sym->attr.dummy || as->cp_was_assumed);
+
+	      /* We should always pass assumed size arrays the g77 way.  */
+	      if (sym->attr.dummy)
+		gfc_trans_g77_array (sym, block);
+	      break;
+
+	    case AS_ASSUMED_SHAPE:
+	      /* Must be a dummy parameter.  */
+	      gcc_assert (sym->attr.dummy);
+
+	      gfc_trans_dummy_array_bias (sym, sym->backend_decl, block);
+	      break;
+
+	    case AS_ASSUMED_RANK:
+	    case AS_DEFERRED:
+	      seen_trans_deferred_array = true;
+	      gfc_trans_deferred_array (sym, block);
+	      if (sym->ts.type == BT_CHARACTER && sym->ts.deferred
+		  && sym->attr.result)
+		{
+		  gfc_start_block (&init);
+		  gfc_save_backend_locus (&loc);
+		  gfc_set_backend_locus (&sym->declared_at);
+		  tmp = gfc_null_and_pass_deferred_len (sym, &init, &loc);
+		  gfc_add_init_cleanup (block, gfc_finish_block (&init), tmp);
+		}
+	      break;
+
+	    default:
+	      gcc_unreachable ();
+	    }
+	  if (alloc_comp_or_fini && !seen_trans_deferred_array)
+	    gfc_trans_deferred_array (sym, block);
+	}
+      else if ((!sym->attr.dummy || sym->ts.deferred)
+		&& (sym->ts.type == BT_CLASS
+		&& CLASS_DATA (sym)->attr.class_pointer))
+	continue;
+      else if ((!sym->attr.dummy || sym->ts.deferred)
+		&& (sym->attr.allocatable
+		    || (sym->attr.pointer && sym->attr.result)
+		    || (sym->ts.type == BT_CLASS
+			&& CLASS_DATA (sym)->attr.allocatable)))
+	{
+	  if (!sym->attr.save && flag_max_stack_var_size != 0)
+	    {
+	      tree descriptor = NULL_TREE;
+
+	      gfc_save_backend_locus (&loc);
+	      gfc_set_backend_locus (&sym->declared_at);
+	      gfc_start_block (&init);
+
+	      if (!sym->attr.pointer)
+		{
+		  /* Nullify and automatic deallocation of allocatable
+		     scalars.  */
+		  e = gfc_lval_expr_from_sym (sym);
+		  if (sym->ts.type == BT_CLASS)
+		    gfc_add_data_component (e);
+
+		  gfc_init_se (&se, NULL);
+		  if (sym->ts.type != BT_CLASS
+		      || sym->ts.u.derived->attr.dimension
+		      || sym->ts.u.derived->attr.codimension)
+		    {
+		      se.want_pointer = 1;
+		      gfc_conv_expr (&se, e);
+		    }
+		  else if (sym->ts.type == BT_CLASS
+			   && !CLASS_DATA (sym)->attr.dimension
+			   && !CLASS_DATA (sym)->attr.codimension)
+		    {
+		      se.want_pointer = 1;
+		      gfc_conv_expr (&se, e);
+		    }
+		  else
+		    {
+		      se.descriptor_only = 1;
+		      gfc_conv_expr (&se, e);
+		      descriptor = se.expr;
+		      se.expr = gfc_conv_descriptor_data_addr (se.expr);
+		      se.expr = build_fold_indirect_ref_loc (input_location, se.expr);
+		    }
+		  gfc_free_expr (e);
+
+		  if (!sym->attr.dummy || sym->attr.intent == INTENT_OUT)
+		    {
+		      /* Nullify when entering the scope.  */
+		      tmp = fold_build2_loc (input_location, MODIFY_EXPR,
+					     TREE_TYPE (se.expr), se.expr,
+					     fold_convert (TREE_TYPE (se.expr),
+							   null_pointer_node));
+		      if (sym->attr.optional)
+			{
+			  tree present = gfc_conv_expr_present (sym);
+			  tmp = build3_loc (input_location, COND_EXPR,
+					    void_type_node, present, tmp,
+					    build_empty_stmt (input_location));
+			}
+		      gfc_add_expr_to_block (&init, tmp);
+		    }
+		}
+
+	      if ((sym->attr.dummy || sym->attr.result)
+		    && sym->ts.type == BT_CHARACTER
+		    && sym->ts.deferred
+		    && sym->ts.u.cl->passed_length)
+		tmp = gfc_null_and_pass_deferred_len (sym, &init, &loc);
+	      else
+		gfc_restore_backend_locus (&loc);
+
+	      /* Deallocate when leaving the scope. Nullifying is not
+		 needed.  */
+	      if (!sym->attr.result && !sym->attr.dummy && !sym->attr.pointer
+		  && !sym->ns->proc_name->attr.is_main_program)
+		{
+		  if (sym->ts.type == BT_CLASS
+		      && CLASS_DATA (sym)->attr.codimension)
+		    tmp = gfc_deallocate_with_status (descriptor, NULL_TREE,
+						      NULL_TREE, NULL_TREE,
+						      NULL_TREE, true, NULL,
+						      GFC_CAF_COARRAY_ANALYZE);
+		  else
+		    {
+		      gfc_expr *expr = gfc_lval_expr_from_sym (sym);
+		      tmp = gfc_deallocate_scalar_with_status (se.expr,
+							       NULL_TREE,
+							       NULL_TREE,
+							       true, expr,
+							       sym->ts);
+		      gfc_free_expr (expr);
+		    }
+		}
+
+	      if (sym->ts.type == BT_CLASS)
+		{
+		  /* Initialize _vptr to declared type.  */
+		  gfc_symbol *vtab;
+		  tree rhs;
+
+		  gfc_save_backend_locus (&loc);
+		  gfc_set_backend_locus (&sym->declared_at);
+		  e = gfc_lval_expr_from_sym (sym);
+		  gfc_add_vptr_component (e);
+		  gfc_init_se (&se, NULL);
+		  se.want_pointer = 1;
+		  gfc_conv_expr (&se, e);
+		  gfc_free_expr (e);
+		  if (UNLIMITED_POLY (sym))
+		    rhs = build_int_cst (TREE_TYPE (se.expr), 0);
+		  else
+		    {
+		      vtab = gfc_find_derived_vtab (sym->ts.u.derived);
+		      rhs = gfc_build_addr_expr (TREE_TYPE (se.expr),
+						gfc_get_symbol_decl (vtab));
+		    }
+		  gfc_add_modify (&init, se.expr, rhs);
+		  gfc_restore_backend_locus (&loc);
+		}
+
+	      gfc_add_init_cleanup (block, gfc_finish_block (&init), tmp);
+	      /* TODO find out why this is necessary to stop double calls to
+		 free.  Somebody is reusing the expression in 'tmp' because
+		 it is being used unititialized.  */
+	      tmp = NULL_TREE;
+	    }
+	}
+      else if (sym->ts.type == BT_CHARACTER && sym->ts.deferred)
+	{
+	  tree tmp = NULL;
+	  stmtblock_t init;
+
+	  /* If we get to here, all that should be left are pointers.  */
+	  gcc_assert (sym->attr.pointer);
+
+	  if (sym->attr.dummy)
+	    {
+	      gfc_start_block (&init);
+	      gfc_save_backend_locus (&loc);
+	      gfc_set_backend_locus (&sym->declared_at);
+	      tmp = gfc_null_and_pass_deferred_len (sym, &init, &loc);
+	      gfc_add_init_cleanup (block, gfc_finish_block (&init), tmp);
+	    }
+	}
+      else if (sym->ts.deferred)
+	gfc_fatal_error ("Deferred type parameter not yet supported");
+      else if (alloc_comp_or_fini)
+	gfc_trans_deferred_array (sym, block);
+      else if (sym->ts.type == BT_CHARACTER)
+	{
+	  gfc_save_backend_locus (&loc);
+	  gfc_set_backend_locus (&sym->declared_at);
+	  if (sym->attr.dummy || sym->attr.result)
+	    gfc_trans_dummy_character (sym, sym->ts.u.cl, block);
+	  else
+	    gfc_trans_auto_character_variable (sym, block);
+	  gfc_restore_backend_locus (&loc);
+	}
+      else if (sym->attr.assign)
+	{
+	  gfc_save_backend_locus (&loc);
+	  gfc_set_backend_locus (&sym->declared_at);
+	  gfc_trans_assign_aux_var (sym, block);
+	  gfc_restore_backend_locus (&loc);
+	}
+      else if (sym->ts.type == BT_DERIVED
+		 && sym->value
+		 && !sym->attr.data
+		 && sym->attr.save == SAVE_NONE)
+	{
+	  gfc_start_block (&tmpblock);
+	  gfc_init_default_dt (sym, &tmpblock, false);
+	  gfc_add_init_cleanup (block, gfc_finish_block (&tmpblock),
+				NULL_TREE);
+	}
+      else if (!(UNLIMITED_POLY(sym)) && !is_pdt_type)
+	gcc_unreachable ();
+    }
+
+  gfc_init_block (&tmpblock);
+
+  for (f = gfc_sym_get_dummy_args (proc_sym); f; f = f->next)
+    {
+      if (f->sym && f->sym->tlink == NULL && f->sym->ts.type == BT_CHARACTER)
+	{
+	  gcc_assert (f->sym->ts.u.cl->backend_decl != NULL);
+	  if (TREE_CODE (f->sym->ts.u.cl->backend_decl) == PARM_DECL)
+	    gfc_trans_vla_type_sizes (f->sym, &tmpblock);
+	}
+    }
+
+  if (gfc_return_by_reference (proc_sym) && proc_sym->ts.type == BT_CHARACTER
+      && current_fake_result_decl != NULL)
+    {
+      gcc_assert (proc_sym->ts.u.cl->backend_decl != NULL);
+      if (TREE_CODE (proc_sym->ts.u.cl->backend_decl) == PARM_DECL)
+	gfc_trans_vla_type_sizes (proc_sym, &tmpblock);
+    }
+
+  gfc_add_init_cleanup (block, gfc_finish_block (&tmpblock), NULL_TREE);
+}
+
+
+struct module_hasher : ggc_ptr_hash<module_htab_entry>
+{
+  typedef const char *compare_type;
+
+  static hashval_t hash (module_htab_entry *s) { return htab_hash_string (s); }
+  static bool
+  equal (module_htab_entry *a, const char *b)
+  {
+    return !strcmp (a->name, b);
+  }
+};
+
+static GTY (()) hash_table<module_hasher> *module_htab;
+
+/* Hash and equality functions for module_htab's decls.  */
+
+hashval_t
+module_decl_hasher::hash (tree t)
+{
+  const_tree n = DECL_NAME (t);
+  if (n == NULL_TREE)
+    n = TYPE_NAME (TREE_TYPE (t));
+  return htab_hash_string (IDENTIFIER_POINTER (n));
+}
+
+bool
+module_decl_hasher::equal (tree t1, const char *x2)
+{
+  const_tree n1 = DECL_NAME (t1);
+  if (n1 == NULL_TREE)
+    n1 = TYPE_NAME (TREE_TYPE (t1));
+  return strcmp (IDENTIFIER_POINTER (n1), x2) == 0;
+}
+
+struct module_htab_entry *
+gfc_find_module (const char *name)
+{
+  if (! module_htab)
+    module_htab = hash_table<module_hasher>::create_ggc (10);
+
+  module_htab_entry **slot
+    = module_htab->find_slot_with_hash (name, htab_hash_string (name), INSERT);
+  if (*slot == NULL)
+    {
+      module_htab_entry *entry = ggc_cleared_alloc<module_htab_entry> ();
+
+      entry->name = gfc_get_string ("%s", name);
+      entry->decls = hash_table<module_decl_hasher>::create_ggc (10);
+      *slot = entry;
+    }
+  return *slot;
+}
+
+void
+gfc_module_add_decl (struct module_htab_entry *entry, tree decl)
+{
+  const char *name;
+
+  if (DECL_NAME (decl))
+    name = IDENTIFIER_POINTER (DECL_NAME (decl));
+  else
+    {
+      gcc_assert (TREE_CODE (decl) == TYPE_DECL);
+      name = IDENTIFIER_POINTER (TYPE_NAME (TREE_TYPE (decl)));
+    }
+  tree *slot
+    = entry->decls->find_slot_with_hash (name, htab_hash_string (name),
+					 INSERT);
+  if (*slot == NULL)
+    *slot = decl;
+}
+
+
+/* Generate debugging symbols for namelists. This function must come after
+   generate_local_decl to ensure that the variables in the namelist are
+   already declared.  */
+
+static tree
+generate_namelist_decl (gfc_symbol * sym)
+{
+  gfc_namelist *nml;
+  tree decl;
+  vec<constructor_elt, va_gc> *nml_decls = NULL;
+
+  gcc_assert (sym->attr.flavor == FL_NAMELIST);
+  for (nml = sym->namelist; nml; nml = nml->next)
+    {
+      if (nml->sym->backend_decl == NULL_TREE)
+	{
+	  nml->sym->attr.referenced = 1;
+	  nml->sym->backend_decl = gfc_get_symbol_decl (nml->sym);
+	}
+      DECL_IGNORED_P (nml->sym->backend_decl) = 0;
+      CONSTRUCTOR_APPEND_ELT (nml_decls, NULL_TREE, nml->sym->backend_decl);
+    }
+
+  decl = make_node (NAMELIST_DECL);
+  TREE_TYPE (decl) = void_type_node;
+  NAMELIST_DECL_ASSOCIATED_DECL (decl) = build_constructor (NULL_TREE, nml_decls);
+  DECL_NAME (decl) = get_identifier (sym->name);
+  return decl;
+}
+
+
+/* Output an initialized decl for a module variable.  */
+
+static void
+gfc_create_module_variable (gfc_symbol * sym)
+{
+  tree decl;
+
+  /* Module functions with alternate entries are dealt with later and
+     would get caught by the next condition.  */
+  if (sym->attr.entry)
+    return;
+
+  /* Make sure we convert the types of the derived types from iso_c_binding
+     into (void *).  */
+  if (sym->attr.flavor != FL_PROCEDURE && sym->attr.is_iso_c
+      && sym->ts.type == BT_DERIVED)
+    sym->backend_decl = gfc_typenode_for_spec (&(sym->ts));
+
+  if (gfc_fl_struct (sym->attr.flavor)
+      && sym->backend_decl
+      && TREE_CODE (sym->backend_decl) == RECORD_TYPE)
+    {
+      decl = sym->backend_decl;
+      gcc_assert (sym->ns->proc_name->attr.flavor == FL_MODULE);
+
+      if (!sym->attr.use_assoc && !sym->attr.used_in_submodule)
+	{
+	  gcc_assert (TYPE_CONTEXT (decl) == NULL_TREE
+		      || TYPE_CONTEXT (decl) == sym->ns->proc_name->backend_decl);
+	  gcc_assert (DECL_CONTEXT (TYPE_STUB_DECL (decl)) == NULL_TREE
+		      || DECL_CONTEXT (TYPE_STUB_DECL (decl))
+			   == sym->ns->proc_name->backend_decl);
+	}
+      TYPE_CONTEXT (decl) = sym->ns->proc_name->backend_decl;
+      DECL_CONTEXT (TYPE_STUB_DECL (decl)) = sym->ns->proc_name->backend_decl;
+      gfc_module_add_decl (cur_module, TYPE_STUB_DECL (decl));
+    }
+
+  /* Only output variables, procedure pointers and array valued,
+     or derived type, parameters.  */
+  if (sym->attr.flavor != FL_VARIABLE
+	&& !(sym->attr.flavor == FL_PARAMETER
+	       && (sym->attr.dimension || sym->ts.type == BT_DERIVED))
+	&& !(sym->attr.flavor == FL_PROCEDURE && sym->attr.proc_pointer))
+    return;
+
+  if ((sym->attr.in_common || sym->attr.in_equivalence) && sym->backend_decl)
+    {
+      decl = sym->backend_decl;
+      gcc_assert (DECL_FILE_SCOPE_P (decl));
+      gcc_assert (sym->ns->proc_name->attr.flavor == FL_MODULE);
+      DECL_CONTEXT (decl) = sym->ns->proc_name->backend_decl;
+      gfc_module_add_decl (cur_module, decl);
+    }
+
+  /* Don't generate variables from other modules. Variables from
+     COMMONs and Cray pointees will already have been generated.  */
+  if (sym->attr.use_assoc || sym->attr.used_in_submodule
+      || sym->attr.in_common || sym->attr.cray_pointee)
+    return;
+
+  /* Equivalenced variables arrive here after creation.  */
+  if (sym->backend_decl
+      && (sym->equiv_built || sym->attr.in_equivalence))
+    return;
+
+  if (sym->backend_decl && !sym->attr.vtab && !sym->attr.target)
+    gfc_internal_error ("backend decl for module variable %qs already exists",
+			sym->name);
+
+  if (sym->module && !sym->attr.result && !sym->attr.dummy
+      && (sym->attr.access == ACCESS_UNKNOWN
+	  && (sym->ns->default_access == ACCESS_PRIVATE
+	      || (sym->ns->default_access == ACCESS_UNKNOWN
+		  && flag_module_private))))
+    sym->attr.access = ACCESS_PRIVATE;
+
+  if (warn_unused_variable && !sym->attr.referenced
+      && sym->attr.access == ACCESS_PRIVATE)
+    gfc_warning (OPT_Wunused_value,
+		 "Unused PRIVATE module variable %qs declared at %L",
+		 sym->name, &sym->declared_at);
+
+  /* We always want module variables to be created.  */
+  sym->attr.referenced = 1;
+  /* Create the decl.  */
+  decl = gfc_get_symbol_decl (sym);
+
+  /* Create the variable.  */
+  pushdecl (decl);
+  gcc_assert (sym->ns->proc_name->attr.flavor == FL_MODULE
+	      || (sym->ns->parent->proc_name->attr.flavor == FL_MODULE
+		  && sym->fn_result_spec));
+  DECL_CONTEXT (decl) = sym->ns->proc_name->backend_decl;
+  rest_of_decl_compilation (decl, 1, 0);
+  gfc_module_add_decl (cur_module, decl);
+
+  /* Also add length of strings.  */
+  if (sym->ts.type == BT_CHARACTER)
+    {
+      tree length;
+
+      length = sym->ts.u.cl->backend_decl;
+      gcc_assert (length || sym->attr.proc_pointer);
+      if (length && !INTEGER_CST_P (length))
+        {
+          pushdecl (length);
+          rest_of_decl_compilation (length, 1, 0);
+        }
+    }
+
+  if (sym->attr.codimension && !sym->attr.dummy && !sym->attr.allocatable
+      && sym->attr.referenced && !sym->attr.use_assoc)
+    has_coarray_vars = true;
+}
+
+/* Emit debug information for USE statements.  */
+
+static void
+gfc_trans_use_stmts (gfc_namespace * ns)
+{
+  gfc_use_list *use_stmt;
+  for (use_stmt = ns->use_stmts; use_stmt; use_stmt = use_stmt->next)
+    {
+      struct module_htab_entry *entry
+	= gfc_find_module (use_stmt->module_name);
+      gfc_use_rename *rent;
+
+      if (entry->namespace_decl == NULL)
+	{
+	  entry->namespace_decl
+	    = build_decl (input_location,
+			  NAMESPACE_DECL,
+			  get_identifier (use_stmt->module_name),
+			  void_type_node);
+	  DECL_EXTERNAL (entry->namespace_decl) = 1;
+	}
+      gfc_set_backend_locus (&use_stmt->where);
+      if (!use_stmt->only_flag)
+	(*debug_hooks->imported_module_or_decl) (entry->namespace_decl,
+						 NULL_TREE,
+						 ns->proc_name->backend_decl,
+						 false, false);
+      for (rent = use_stmt->rename; rent; rent = rent->next)
+	{
+	  tree decl, local_name;
+
+	  if (rent->op != INTRINSIC_NONE)
+	    continue;
+
+						 hashval_t hash = htab_hash_string (rent->use_name);
+	  tree *slot = entry->decls->find_slot_with_hash (rent->use_name, hash,
+							  INSERT);
+	  if (*slot == NULL)
+	    {
+	      gfc_symtree *st;
+
+	      st = gfc_find_symtree (ns->sym_root,
+				     rent->local_name[0]
+				     ? rent->local_name : rent->use_name);
+
+	      /* The following can happen if a derived type is renamed.  */
+	      if (!st)
+		{
+		  char *name;
+		  name = xstrdup (rent->local_name[0]
+				  ? rent->local_name : rent->use_name);
+		  name[0] = (char) TOUPPER ((unsigned char) name[0]);
+		  st = gfc_find_symtree (ns->sym_root, name);
+		  free (name);
+		  gcc_assert (st);
+		}
+
+	      /* Sometimes, generic interfaces wind up being over-ruled by a
+		 local symbol (see PR41062).  */
+	      if (!st->n.sym->attr.use_assoc)
+		continue;
+
+	      if (st->n.sym->backend_decl
+		  && DECL_P (st->n.sym->backend_decl)
+		  && st->n.sym->module
+		  && strcmp (st->n.sym->module, use_stmt->module_name) == 0)
+		{
+		  gcc_assert (DECL_EXTERNAL (entry->namespace_decl)
+			      || !VAR_P (st->n.sym->backend_decl));
+		  decl = copy_node (st->n.sym->backend_decl);
+		  DECL_CONTEXT (decl) = entry->namespace_decl;
+		  DECL_EXTERNAL (decl) = 1;
+		  DECL_IGNORED_P (decl) = 0;
+		  DECL_INITIAL (decl) = NULL_TREE;
+		}
+	      else if (st->n.sym->attr.flavor == FL_NAMELIST
+		       && st->n.sym->attr.use_only
+		       && st->n.sym->module
+		       && strcmp (st->n.sym->module, use_stmt->module_name)
+			  == 0)
+		{
+		  decl = generate_namelist_decl (st->n.sym);
+		  DECL_CONTEXT (decl) = entry->namespace_decl;
+		  DECL_EXTERNAL (decl) = 1;
+		  DECL_IGNORED_P (decl) = 0;
+		  DECL_INITIAL (decl) = NULL_TREE;
+		}
+	      else
+		{
+		  *slot = error_mark_node;
+		  entry->decls->clear_slot (slot);
+		  continue;
+		}
+	      *slot = decl;
+	    }
+	  decl = (tree) *slot;
+	  if (rent->local_name[0])
+	    local_name = get_identifier (rent->local_name);
+	  else
+	    local_name = NULL_TREE;
+	  gfc_set_backend_locus (&rent->where);
+	  (*debug_hooks->imported_module_or_decl) (decl, local_name,
+						   ns->proc_name->backend_decl,
+						   !use_stmt->only_flag,
+						   false);
+	}
+    }
+}
+
+
+/* Return true if expr is a constant initializer that gfc_conv_initializer
+   will handle.  */
+
+static bool
+check_constant_initializer (gfc_expr *expr, gfc_typespec *ts, bool array,
+			    bool pointer)
+{
+  gfc_constructor *c;
+  gfc_component *cm;
+
+  if (pointer)
+    return true;
+  else if (array)
+    {
+      if (expr->expr_type == EXPR_CONSTANT || expr->expr_type == EXPR_NULL)
+	return true;
+      else if (expr->expr_type == EXPR_STRUCTURE)
+	return check_constant_initializer (expr, ts, false, false);
+      else if (expr->expr_type != EXPR_ARRAY)
+	return false;
+      for (c = gfc_constructor_first (expr->value.constructor);
+	   c; c = gfc_constructor_next (c))
+	{
+	  if (c->iterator)
+	    return false;
+	  if (c->expr->expr_type == EXPR_STRUCTURE)
+	    {
+	      if (!check_constant_initializer (c->expr, ts, false, false))
+		return false;
+	    }
+	  else if (c->expr->expr_type != EXPR_CONSTANT)
+	    return false;
+	}
+      return true;
+    }
+  else switch (ts->type)
+    {
+    case_bt_struct:
+      if (expr->expr_type != EXPR_STRUCTURE)
+	return false;
+      cm = expr->ts.u.derived->components;
+      for (c = gfc_constructor_first (expr->value.constructor);
+	   c; c = gfc_constructor_next (c), cm = cm->next)
+	{
+	  if (!c->expr || cm->attr.allocatable)
+	    continue;
+	  if (!check_constant_initializer (c->expr, &cm->ts,
+					   cm->attr.dimension,
+					   cm->attr.pointer))
+	    return false;
+	}
+      return true;
+    default:
+      return expr->expr_type == EXPR_CONSTANT;
+    }
+}
+
+/* Emit debug info for parameters and unreferenced variables with
+   initializers.  */
+
+static void
+gfc_emit_parameter_debug_info (gfc_symbol *sym)
+{
+  tree decl;
+
+  if (sym->attr.flavor != FL_PARAMETER
+      && (sym->attr.flavor != FL_VARIABLE || sym->attr.referenced))
+    return;
+
+  if (sym->backend_decl != NULL
+      || sym->value == NULL
+      || sym->attr.use_assoc
+      || sym->attr.dummy
+      || sym->attr.result
+      || sym->attr.function
+      || sym->attr.intrinsic
+      || sym->attr.pointer
+      || sym->attr.allocatable
+      || sym->attr.cray_pointee
+      || sym->attr.threadprivate
+      || sym->attr.is_bind_c
+      || sym->attr.subref_array_pointer
+      || sym->attr.assign)
+    return;
+
+  if (sym->ts.type == BT_CHARACTER)
+    {
+      gfc_conv_const_charlen (sym->ts.u.cl);
+      if (sym->ts.u.cl->backend_decl == NULL
+	  || TREE_CODE (sym->ts.u.cl->backend_decl) != INTEGER_CST)
+	return;
+    }
+  else if (sym->ts.type == BT_DERIVED && sym->ts.u.derived->attr.alloc_comp)
+    return;
+
+  if (sym->as)
+    {
+      int n;
+
+      if (sym->as->type != AS_EXPLICIT)
+	return;
+      for (n = 0; n < sym->as->rank; n++)
+	if (sym->as->lower[n]->expr_type != EXPR_CONSTANT
+	    || sym->as->upper[n] == NULL
+	    || sym->as->upper[n]->expr_type != EXPR_CONSTANT)
+	  return;
+    }
+
+  if (!check_constant_initializer (sym->value, &sym->ts,
+				   sym->attr.dimension, false))
+    return;
+
+  if (flag_coarray == GFC_FCOARRAY_LIB && sym->attr.codimension)
+    return;
+
+  /* Create the decl for the variable or constant.  */
+  decl = build_decl (input_location,
+		     sym->attr.flavor == FL_PARAMETER ? CONST_DECL : VAR_DECL,
+		     gfc_sym_identifier (sym), gfc_sym_type (sym));
+  if (sym->attr.flavor == FL_PARAMETER)
+    TREE_READONLY (decl) = 1;
+  gfc_set_decl_location (decl, &sym->declared_at);
+  if (sym->attr.dimension)
+    GFC_DECL_PACKED_ARRAY (decl) = 1;
+  DECL_CONTEXT (decl) = sym->ns->proc_name->backend_decl;
+  TREE_STATIC (decl) = 1;
+  TREE_USED (decl) = 1;
+  if (DECL_CONTEXT (decl) && TREE_CODE (DECL_CONTEXT (decl)) == NAMESPACE_DECL)
+    TREE_PUBLIC (decl) = 1;
+  DECL_INITIAL (decl) = gfc_conv_initializer (sym->value, &sym->ts,
+					      TREE_TYPE (decl),
+					      sym->attr.dimension,
+					      false, false);
+  debug_hooks->early_global_decl (decl);
+}
+
+
+static void
+generate_coarray_sym_init (gfc_symbol *sym)
+{
+  tree tmp, size, decl, token, desc;
+  bool is_lock_type, is_event_type;
+  int reg_type;
+  gfc_se se;
+  symbol_attribute attr;
+
+  if (sym->attr.dummy || sym->attr.allocatable || !sym->attr.codimension
+      || sym->attr.use_assoc || !sym->attr.referenced
+      || sym->attr.select_type_temporary)
+    return;
+
+  decl = sym->backend_decl;
+  TREE_USED(decl) = 1;
+  gcc_assert (GFC_ARRAY_TYPE_P (TREE_TYPE (decl)));
+
+  is_lock_type = sym->ts.type == BT_DERIVED
+		 && sym->ts.u.derived->from_intmod == INTMOD_ISO_FORTRAN_ENV
+		 && sym->ts.u.derived->intmod_sym_id == ISOFORTRAN_LOCK_TYPE;
+
+  is_event_type = sym->ts.type == BT_DERIVED
+		  && sym->ts.u.derived->from_intmod == INTMOD_ISO_FORTRAN_ENV
+		  && sym->ts.u.derived->intmod_sym_id == ISOFORTRAN_EVENT_TYPE;
+
+  /* FIXME: Workaround for PR middle-end/49106, cf. also PR middle-end/49108
+     to make sure the variable is not optimized away.  */
+  DECL_PRESERVE_P (DECL_CONTEXT (decl)) = 1;
+
+  /* For lock types, we pass the array size as only the library knows the
+     size of the variable.  */
+  if (is_lock_type || is_event_type)
+    size = gfc_index_one_node;
+  else
+    size = TYPE_SIZE_UNIT (gfc_get_element_type (TREE_TYPE (decl)));
+
+  /* Ensure that we do not have size=0 for zero-sized arrays.  */
+  size = fold_build2_loc (input_location, MAX_EXPR, size_type_node,
+			  fold_convert (size_type_node, size),
+			  build_int_cst (size_type_node, 1));
+
+  if (GFC_TYPE_ARRAY_RANK (TREE_TYPE (decl)))
+    {
+      tmp = GFC_TYPE_ARRAY_SIZE (TREE_TYPE (decl));
+      size = fold_build2_loc (input_location, MULT_EXPR, size_type_node,
+			      fold_convert (size_type_node, tmp), size);
+    }
+
+  gcc_assert (GFC_TYPE_ARRAY_CAF_TOKEN (TREE_TYPE (decl)) != NULL_TREE);
+  token = gfc_build_addr_expr (ppvoid_type_node,
+			       GFC_TYPE_ARRAY_CAF_TOKEN (TREE_TYPE(decl)));
+  if (is_lock_type)
+    reg_type = sym->attr.artificial ? GFC_CAF_CRITICAL : GFC_CAF_LOCK_STATIC;
+  else if (is_event_type)
+    reg_type = GFC_CAF_EVENT_STATIC;
+  else
+    reg_type = GFC_CAF_COARRAY_STATIC;
+
+  /* Compile the symbol attribute.  */
+  if (sym->ts.type == BT_CLASS)
+    {
+      attr = CLASS_DATA (sym)->attr;
+      /* The pointer attribute is always set on classes, overwrite it with the
+	 class_pointer attribute, which denotes the pointer for classes.  */
+      attr.pointer = attr.class_pointer;
+    }
+  else
+    attr = sym->attr;
+  gfc_init_se (&se, NULL);
+  desc = gfc_conv_scalar_to_descriptor (&se, decl, attr);
+  gfc_add_block_to_block (&caf_init_block, &se.pre);
+
+  tmp = build_call_expr_loc (input_location, gfor_fndecl_caf_register, 7, size,
+			     build_int_cst (integer_type_node, reg_type),
+			     token, gfc_build_addr_expr (pvoid_type_node, desc),
+			     null_pointer_node, /* stat.  */
+			     null_pointer_node, /* errgmsg.  */
+			     integer_zero_node); /* errmsg_len.  */
+  gfc_add_expr_to_block (&caf_init_block, tmp);
+  gfc_add_modify (&caf_init_block, decl, fold_convert (TREE_TYPE (decl),
+					  gfc_conv_descriptor_data_get (desc)));
+
+  /* Handle "static" initializer.  */
+  if (sym->value)
+    {
+      sym->attr.pointer = 1;
+      tmp = gfc_trans_assignment (gfc_lval_expr_from_sym (sym), sym->value,
+				  true, false);
+      sym->attr.pointer = 0;
+      gfc_add_expr_to_block (&caf_init_block, tmp);
+    }
+  else if (sym->ts.type == BT_DERIVED && sym->ts.u.derived->attr.pointer_comp)
+    {
+      tmp = gfc_nullify_alloc_comp (sym->ts.u.derived, decl, sym->as
+				    ? sym->as->rank : 0,
+				    GFC_STRUCTURE_CAF_MODE_IN_COARRAY);
+      gfc_add_expr_to_block (&caf_init_block, tmp);
+    }
+}
+
+
+/* Generate constructor function to initialize static, nonallocatable
+   coarrays.  */
+
+static void
+generate_coarray_init (gfc_namespace * ns __attribute((unused)))
+{
+  tree fndecl, tmp, decl, save_fn_decl;
+
+  save_fn_decl = current_function_decl;
+  push_function_context ();
+
+  tmp = build_function_type_list (void_type_node, NULL_TREE);
+  fndecl = build_decl (input_location, FUNCTION_DECL,
+		       create_tmp_var_name ("_caf_init"), tmp);
+
+  DECL_STATIC_CONSTRUCTOR (fndecl) = 1;
+  SET_DECL_INIT_PRIORITY (fndecl, DEFAULT_INIT_PRIORITY);
+
+  decl = build_decl (input_location, RESULT_DECL, NULL_TREE, void_type_node);
+  DECL_ARTIFICIAL (decl) = 1;
+  DECL_IGNORED_P (decl) = 1;
+  DECL_CONTEXT (decl) = fndecl;
+  DECL_RESULT (fndecl) = decl;
+
+  pushdecl (fndecl);
+  current_function_decl = fndecl;
+  announce_function (fndecl);
+
+  rest_of_decl_compilation (fndecl, 0, 0);
+  make_decl_rtl (fndecl);
+  allocate_struct_function (fndecl, false);
+
+  pushlevel ();
+  gfc_init_block (&caf_init_block);
+
+  gfc_traverse_ns (ns, generate_coarray_sym_init);
+
+  DECL_SAVED_TREE (fndecl) = gfc_finish_block (&caf_init_block);
+  decl = getdecls ();
+
+  poplevel (1, 1);
+  BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
+
+  DECL_SAVED_TREE (fndecl)
+    = build3_v (BIND_EXPR, decl, DECL_SAVED_TREE (fndecl),
+                DECL_INITIAL (fndecl));
+  dump_function (TDI_original, fndecl);
+
+  cfun->function_end_locus = input_location;
+  set_cfun (NULL);
+
+  if (decl_function_context (fndecl))
+    (void) cgraph_node::create (fndecl);
+  else
+    cgraph_node::finalize_function (fndecl, true);
+
+  pop_function_context ();
+  current_function_decl = save_fn_decl;
+}
+
+
+static void
+create_module_nml_decl (gfc_symbol *sym)
+{
+  if (sym->attr.flavor == FL_NAMELIST)
+    {
+      tree decl = generate_namelist_decl (sym);
+      pushdecl (decl);
+      gcc_assert (sym->ns->proc_name->attr.flavor == FL_MODULE);
+      DECL_CONTEXT (decl) = sym->ns->proc_name->backend_decl;
+      rest_of_decl_compilation (decl, 1, 0);
+      gfc_module_add_decl (cur_module, decl);
+    }
+}
+
+
+/* Generate all the required code for module variables.  */
+
+void
+gfc_generate_module_vars (gfc_namespace * ns)
+{
+  module_namespace = ns;
+  cur_module = gfc_find_module (ns->proc_name->name);
+
+  /* Check if the frontend left the namespace in a reasonable state.  */
+  gcc_assert (ns->proc_name && !ns->proc_name->tlink);
+
+  /* Generate COMMON blocks.  */
+  gfc_trans_common (ns);
+
+  has_coarray_vars = false;
+
+  /* Create decls for all the module variables.  */
+  gfc_traverse_ns (ns, gfc_create_module_variable);
+  gfc_traverse_ns (ns, create_module_nml_decl);
+
+  if (flag_coarray == GFC_FCOARRAY_LIB && has_coarray_vars)
+    generate_coarray_init (ns);
+
+  cur_module = NULL;
+
+  gfc_trans_use_stmts (ns);
+  gfc_traverse_ns (ns, gfc_emit_parameter_debug_info);
+}
+
+
+static void
+gfc_generate_contained_functions (gfc_namespace * parent)
+{
+  gfc_namespace *ns;
+
+  /* We create all the prototypes before generating any code.  */
+  for (ns = parent->contained; ns; ns = ns->sibling)
+    {
+      /* Skip namespaces from used modules.  */
+      if (ns->parent != parent)
+	continue;
+
+      gfc_create_function_decl (ns, false);
+    }
+
+  for (ns = parent->contained; ns; ns = ns->sibling)
+    {
+      /* Skip namespaces from used modules.  */
+      if (ns->parent != parent)
+	continue;
+
+      gfc_generate_function_code (ns);
+    }
+}
+
+
+/* Drill down through expressions for the array specification bounds and
+   character length calling generate_local_decl for all those variables
+   that have not already been declared.  */
+
+static void
+generate_local_decl (gfc_symbol *);
+
+/* Traverse expr, marking all EXPR_VARIABLE symbols referenced.  */
+
+static bool
+expr_decls (gfc_expr *e, gfc_symbol *sym,
+	    int *f ATTRIBUTE_UNUSED)
+{
+  if (e->expr_type != EXPR_VARIABLE
+	    || sym == e->symtree->n.sym
+	    || e->symtree->n.sym->mark
+	    || e->symtree->n.sym->ns != sym->ns)
+	return false;
+
+  generate_local_decl (e->symtree->n.sym);
+  return false;
+}
+
+static void
+generate_expr_decls (gfc_symbol *sym, gfc_expr *e)
+{
+  gfc_traverse_expr (e, sym, expr_decls, 0);
+}
+
+
+/* Check for dependencies in the character length and array spec.  */
+
+static void
+generate_dependency_declarations (gfc_symbol *sym)
+{
+  int i;
+
+  if (sym->ts.type == BT_CHARACTER
+      && sym->ts.u.cl
+      && sym->ts.u.cl->length
+      && sym->ts.u.cl->length->expr_type != EXPR_CONSTANT)
+    generate_expr_decls (sym, sym->ts.u.cl->length);
+
+  if (sym->as && sym->as->rank)
+    {
+      for (i = 0; i < sym->as->rank; i++)
+	{
+          generate_expr_decls (sym, sym->as->lower[i]);
+          generate_expr_decls (sym, sym->as->upper[i]);
+	}
+    }
+}
+
+
+/* Generate decls for all local variables.  We do this to ensure correct
+   handling of expressions which only appear in the specification of
+   other functions.  */
+
+static void
+generate_local_decl (gfc_symbol * sym)
+{
+  if (sym->attr.flavor == FL_VARIABLE)
+    {
+      if (sym->attr.codimension && !sym->attr.dummy && !sym->attr.allocatable
+	  && sym->attr.referenced && !sym->attr.use_assoc)
+	has_coarray_vars = true;
+
+      if (!sym->attr.dummy && !sym->ns->proc_name->attr.entry_master)
+	generate_dependency_declarations (sym);
+
+      if (sym->attr.referenced)
+	gfc_get_symbol_decl (sym);
+
+      /* Warnings for unused dummy arguments.  */
+      else if (sym->attr.dummy && !sym->attr.in_namelist)
+	{
+	  /* INTENT(out) dummy arguments are likely meant to be set.  */
+	  if (warn_unused_dummy_argument && sym->attr.intent == INTENT_OUT)
+	    {
+	      if (sym->ts.type != BT_DERIVED)
+		gfc_warning (OPT_Wunused_dummy_argument,
+			     "Dummy argument %qs at %L was declared "
+			     "INTENT(OUT) but was not set",  sym->name,
+			     &sym->declared_at);
+	      else if (!gfc_has_default_initializer (sym->ts.u.derived)
+		       && !sym->ts.u.derived->attr.zero_comp)
+		gfc_warning (OPT_Wunused_dummy_argument,
+			     "Derived-type dummy argument %qs at %L was "
+			     "declared INTENT(OUT) but was not set and "
+			     "does not have a default initializer",
+			     sym->name, &sym->declared_at);
+	      if (sym->backend_decl != NULL_TREE)
+		TREE_NO_WARNING(sym->backend_decl) = 1;
+	    }
+	  else if (warn_unused_dummy_argument)
+	    {
+	      gfc_warning (OPT_Wunused_dummy_argument,
+			   "Unused dummy argument %qs at %L", sym->name,
+			   &sym->declared_at);
+	      if (sym->backend_decl != NULL_TREE)
+		TREE_NO_WARNING(sym->backend_decl) = 1;
+	    }
+	}
+
+      /* Warn for unused variables, but not if they're inside a common
+	 block or a namelist.  */
+      else if (warn_unused_variable
+	       && !(sym->attr.in_common || sym->mark || sym->attr.in_namelist))
+	{
+	  if (sym->attr.use_only)
+	    {
+	      gfc_warning (OPT_Wunused_variable,
+			   "Unused module variable %qs which has been "
+			   "explicitly imported at %L", sym->name,
+			   &sym->declared_at);
+	      if (sym->backend_decl != NULL_TREE)
+		TREE_NO_WARNING(sym->backend_decl) = 1;
+	    }
+	  else if (!sym->attr.use_assoc)
+	    {
+	      /* Corner case: the symbol may be an entry point.  At this point,
+		 it may appear to be an unused variable.  Suppress warning.  */
+	      bool enter = false;
+	      gfc_entry_list *el;
+
+	      for (el = sym->ns->entries; el; el=el->next)
+		if (strcmp(sym->name, el->sym->name) == 0)
+		  enter = true;
+
+	      if (!enter)
+		gfc_warning (OPT_Wunused_variable,
+			     "Unused variable %qs declared at %L",
+			     sym->name, &sym->declared_at);
+	      if (sym->backend_decl != NULL_TREE)
+		TREE_NO_WARNING(sym->backend_decl) = 1;
+	    }
+	}
+
+      /* For variable length CHARACTER parameters, the PARM_DECL already
+	 references the length variable, so force gfc_get_symbol_decl
+	 even when not referenced.  If optimize > 0, it will be optimized
+	 away anyway.  But do this only after emitting -Wunused-parameter
+	 warning if requested.  */
+      if (sym->attr.dummy && !sym->attr.referenced
+	    && sym->ts.type == BT_CHARACTER
+	    && sym->ts.u.cl->backend_decl != NULL
+	    && VAR_P (sym->ts.u.cl->backend_decl))
+	{
+	  sym->attr.referenced = 1;
+	  gfc_get_symbol_decl (sym);
+	}
+
+      /* INTENT(out) dummy arguments and result variables with allocatable
+	 components are reset by default and need to be set referenced to
+	 generate the code for nullification and automatic lengths.  */
+      if (!sym->attr.referenced
+	    && sym->ts.type == BT_DERIVED
+	    && sym->ts.u.derived->attr.alloc_comp
+	    && !sym->attr.pointer
+	    && ((sym->attr.dummy && sym->attr.intent == INTENT_OUT)
+		  ||
+		(sym->attr.result && sym != sym->result)))
+	{
+	  sym->attr.referenced = 1;
+	  gfc_get_symbol_decl (sym);
+	}
+
+      /* Check for dependencies in the array specification and string
+	length, adding the necessary declarations to the function.  We
+	mark the symbol now, as well as in traverse_ns, to prevent
+	getting stuck in a circular dependency.  */
+      sym->mark = 1;
+    }
+  else if (sym->attr.flavor == FL_PARAMETER)
+    {
+      if (warn_unused_parameter
+           && !sym->attr.referenced)
+	{
+           if (!sym->attr.use_assoc)
+	     gfc_warning (OPT_Wunused_parameter,
+			  "Unused parameter %qs declared at %L", sym->name,
+			  &sym->declared_at);
+	   else if (sym->attr.use_only)
+	     gfc_warning (OPT_Wunused_parameter,
+			  "Unused parameter %qs which has been explicitly "
+			  "imported at %L", sym->name, &sym->declared_at);
+	}
+
+      if (sym->ns
+	  && sym->ns->parent
+	  && sym->ns->parent->code
+	  && sym->ns->parent->code->op == EXEC_BLOCK)
+	{
+	  if (sym->attr.referenced)
+	    gfc_get_symbol_decl (sym);
+	  sym->mark = 1;
+	}
+    }
+  else if (sym->attr.flavor == FL_PROCEDURE)
+    {
+      /* TODO: move to the appropriate place in resolve.c.  */
+      if (warn_return_type
+	  && sym->attr.function
+	  && sym->result
+	  && sym != sym->result
+	  && !sym->result->attr.referenced
+	  && !sym->attr.use_assoc
+	  && sym->attr.if_source != IFSRC_IFBODY)
+	{
+	  gfc_warning (OPT_Wreturn_type,
+		       "Return value %qs of function %qs declared at "
+		       "%L not set", sym->result->name, sym->name,
+		        &sym->result->declared_at);
+
+	  /* Prevents "Unused variable" warning for RESULT variables.  */
+	  sym->result->mark = 1;
+	}
+    }
+
+  if (sym->attr.dummy == 1)
+    {
+      /* Modify the tree type for scalar character dummy arguments of bind(c)
+	 procedures if they are passed by value.  The tree type for them will
+	 be promoted to INTEGER_TYPE for the middle end, which appears to be
+	 what C would do with characters passed by-value.  The value attribute
+         implies the dummy is a scalar.  */
+      if (sym->attr.value == 1 && sym->backend_decl != NULL
+	  && sym->ts.type == BT_CHARACTER && sym->ts.is_c_interop
+	  && sym->ns->proc_name != NULL && sym->ns->proc_name->attr.is_bind_c)
+	gfc_conv_scalar_char_value (sym, NULL, NULL);
+
+      /* Unused procedure passed as dummy argument.  */
+      if (sym->attr.flavor == FL_PROCEDURE)
+	{
+	  if (!sym->attr.referenced)
+	    {
+	      if (warn_unused_dummy_argument)
+		gfc_warning (OPT_Wunused_dummy_argument,
+			     "Unused dummy argument %qs at %L", sym->name,
+			     &sym->declared_at);
+	    }
+
+	  /* Silence bogus "unused parameter" warnings from the
+	     middle end.  */
+	  if (sym->backend_decl != NULL_TREE)
+		TREE_NO_WARNING (sym->backend_decl) = 1;
+	}
+    }
+
+  /* Make sure we convert the types of the derived types from iso_c_binding
+     into (void *).  */
+  if (sym->attr.flavor != FL_PROCEDURE && sym->attr.is_iso_c
+      && sym->ts.type == BT_DERIVED)
+    sym->backend_decl = gfc_typenode_for_spec (&(sym->ts));
+}
+
+
+static void
+generate_local_nml_decl (gfc_symbol * sym)
+{
+  if (sym->attr.flavor == FL_NAMELIST && !sym->attr.use_assoc)
+    {
+      tree decl = generate_namelist_decl (sym);
+      pushdecl (decl);
+    }
+}
+
+
+static void
+generate_local_vars (gfc_namespace * ns)
+{
+  gfc_traverse_ns (ns, generate_local_decl);
+  gfc_traverse_ns (ns, generate_local_nml_decl);
+}
+
+
+/* Generate a switch statement to jump to the correct entry point.  Also
+   creates the label decls for the entry points.  */
+
+static tree
+gfc_trans_entry_master_switch (gfc_entry_list * el)
+{
+  stmtblock_t block;
+  tree label;
+  tree tmp;
+  tree val;
+
+  gfc_init_block (&block);
+  for (; el; el = el->next)
+    {
+      /* Add the case label.  */
+      label = gfc_build_label_decl (NULL_TREE);
+      val = build_int_cst (gfc_array_index_type, el->id);
+      tmp = build_case_label (val, NULL_TREE, label);
+      gfc_add_expr_to_block (&block, tmp);
+
+      /* And jump to the actual entry point.  */
+      label = gfc_build_label_decl (NULL_TREE);
+      tmp = build1_v (GOTO_EXPR, label);
+      gfc_add_expr_to_block (&block, tmp);
+
+      /* Save the label decl.  */
+      el->label = label;
+    }
+  tmp = gfc_finish_block (&block);
+  /* The first argument selects the entry point.  */
+  val = DECL_ARGUMENTS (current_function_decl);
+  tmp = fold_build3_loc (input_location, SWITCH_EXPR, NULL_TREE,
+			 val, tmp, NULL_TREE);
+  return tmp;
+}
+
+
+/* Add code to string lengths of actual arguments passed to a function against
+   the expected lengths of the dummy arguments.  */
+
+static void
+add_argument_checking (stmtblock_t *block, gfc_symbol *sym)
+{
+  gfc_formal_arglist *formal;
+
+  for (formal = gfc_sym_get_dummy_args (sym); formal; formal = formal->next)
+    if (formal->sym && formal->sym->ts.type == BT_CHARACTER
+	&& !formal->sym->ts.deferred)
+      {
+	enum tree_code comparison;
+	tree cond;
+	tree argname;
+	gfc_symbol *fsym;
+	gfc_charlen *cl;
+	const char *message;
+
+	fsym = formal->sym;
+	cl = fsym->ts.u.cl;
+
+	gcc_assert (cl);
+	gcc_assert (cl->passed_length != NULL_TREE);
+	gcc_assert (cl->backend_decl != NULL_TREE);
+
+	/* For POINTER, ALLOCATABLE and assumed-shape dummy arguments, the
+	   string lengths must match exactly.  Otherwise, it is only required
+	   that the actual string length is *at least* the expected one.
+	   Sequence association allows for a mismatch of the string length
+	   if the actual argument is (part of) an array, but only if the
+	   dummy argument is an array. (See "Sequence association" in
+	   Section 12.4.1.4 for F95 and 12.4.1.5 for F2003.)  */
+	if (fsym->attr.pointer || fsym->attr.allocatable
+	    || (fsym->as && (fsym->as->type == AS_ASSUMED_SHAPE
+			     || fsym->as->type == AS_ASSUMED_RANK)))
+	  {
+	    comparison = NE_EXPR;
+	    message = _("Actual string length does not match the declared one"
+			" for dummy argument '%s' (%ld/%ld)");
+	  }
+	else if (fsym->as && fsym->as->rank != 0)
+	  continue;
+	else
+	  {
+	    comparison = LT_EXPR;
+	    message = _("Actual string length is shorter than the declared one"
+			" for dummy argument '%s' (%ld/%ld)");
+	  }
+
+	/* Build the condition.  For optional arguments, an actual length
+	   of 0 is also acceptable if the associated string is NULL, which
+	   means the argument was not passed.  */
+	cond = fold_build2_loc (input_location, comparison, boolean_type_node,
+				cl->passed_length, cl->backend_decl);
+	if (fsym->attr.optional)
+	  {
+	    tree not_absent;
+	    tree not_0length;
+	    tree absent_failed;
+
+	    not_0length = fold_build2_loc (input_location, NE_EXPR,
+					   boolean_type_node,
+					   cl->passed_length,
+					   build_zero_cst (gfc_charlen_type_node));
+	    /* The symbol needs to be referenced for gfc_get_symbol_decl.  */
+	    fsym->attr.referenced = 1;
+	    not_absent = gfc_conv_expr_present (fsym);
+
+	    absent_failed = fold_build2_loc (input_location, TRUTH_OR_EXPR,
+					     boolean_type_node, not_0length,
+					     not_absent);
+
+	    cond = fold_build2_loc (input_location, TRUTH_AND_EXPR,
+				    boolean_type_node, cond, absent_failed);
+	  }
+
+	/* Build the runtime check.  */
+	argname = gfc_build_cstring_const (fsym->name);
+	argname = gfc_build_addr_expr (pchar_type_node, argname);
+	gfc_trans_runtime_check (true, false, cond, block, &fsym->declared_at,
+				 message, argname,
+				 fold_convert (long_integer_type_node,
+					       cl->passed_length),
+				 fold_convert (long_integer_type_node,
+					       cl->backend_decl));
+      }
+}
+
+
+static void
+create_main_function (tree fndecl)
+{
+  tree old_context;
+  tree ftn_main;
+  tree tmp, decl, result_decl, argc, argv, typelist, arglist;
+  stmtblock_t body;
+
+  old_context = current_function_decl;
+
+  if (old_context)
+    {
+      push_function_context ();
+      saved_parent_function_decls = saved_function_decls;
+      saved_function_decls = NULL_TREE;
+    }
+
+  /* main() function must be declared with global scope.  */
+  gcc_assert (current_function_decl == NULL_TREE);
+
+  /* Declare the function.  */
+  tmp =  build_function_type_list (integer_type_node, integer_type_node,
+				   build_pointer_type (pchar_type_node),
+				   NULL_TREE);
+  main_identifier_node = get_identifier ("main");
+  ftn_main = build_decl (input_location, FUNCTION_DECL,
+      			 main_identifier_node, tmp);
+  DECL_EXTERNAL (ftn_main) = 0;
+  TREE_PUBLIC (ftn_main) = 1;
+  TREE_STATIC (ftn_main) = 1;
+  DECL_ATTRIBUTES (ftn_main)
+      = tree_cons (get_identifier("externally_visible"), NULL_TREE, NULL_TREE);
+
+  /* Setup the result declaration (for "return 0").  */
+  result_decl = build_decl (input_location,
+			    RESULT_DECL, NULL_TREE, integer_type_node);
+  DECL_ARTIFICIAL (result_decl) = 1;
+  DECL_IGNORED_P (result_decl) = 1;
+  DECL_CONTEXT (result_decl) = ftn_main;
+  DECL_RESULT (ftn_main) = result_decl;
+
+  pushdecl (ftn_main);
+
+  /* Get the arguments.  */
+
+  arglist = NULL_TREE;
+  typelist = TYPE_ARG_TYPES (TREE_TYPE (ftn_main));
+
+  tmp = TREE_VALUE (typelist);
+  argc = build_decl (input_location, PARM_DECL, get_identifier ("argc"), tmp);
+  DECL_CONTEXT (argc) = ftn_main;
+  DECL_ARG_TYPE (argc) = TREE_VALUE (typelist);
+  TREE_READONLY (argc) = 1;
+  gfc_finish_decl (argc);
+  arglist = chainon (arglist, argc);
+
+  typelist = TREE_CHAIN (typelist);
+  tmp = TREE_VALUE (typelist);
+  argv = build_decl (input_location, PARM_DECL, get_identifier ("argv"), tmp);
+  DECL_CONTEXT (argv) = ftn_main;
+  DECL_ARG_TYPE (argv) = TREE_VALUE (typelist);
+  TREE_READONLY (argv) = 1;
+  DECL_BY_REFERENCE (argv) = 1;
+  gfc_finish_decl (argv);
+  arglist = chainon (arglist, argv);
+
+  DECL_ARGUMENTS (ftn_main) = arglist;
+  current_function_decl = ftn_main;
+  announce_function (ftn_main);
+
+  rest_of_decl_compilation (ftn_main, 1, 0);
+  make_decl_rtl (ftn_main);
+  allocate_struct_function (ftn_main, false);
+  pushlevel ();
+
+  gfc_init_block (&body);
+
+  /* Call some libgfortran initialization routines, call then MAIN__().  */
+
+  /* Call _gfortran_caf_init (*argc, ***argv).  */
+  if (flag_coarray == GFC_FCOARRAY_LIB)
+    {
+      tree pint_type, pppchar_type;
+      pint_type = build_pointer_type (integer_type_node);
+      pppchar_type
+	= build_pointer_type (build_pointer_type (pchar_type_node));
+
+      tmp = build_call_expr_loc (input_location, gfor_fndecl_caf_init, 2,
+		gfc_build_addr_expr (pint_type, argc),
+		gfc_build_addr_expr (pppchar_type, argv));
+      gfc_add_expr_to_block (&body, tmp);
+    }
+
+  /* Call _gfortran_set_args (argc, argv).  */
+  TREE_USED (argc) = 1;
+  TREE_USED (argv) = 1;
+  tmp = build_call_expr_loc (input_location,
+			 gfor_fndecl_set_args, 2, argc, argv);
+  gfc_add_expr_to_block (&body, tmp);
+
+  /* Add a call to set_options to set up the runtime library Fortran
+     language standard parameters.  */
+  {
+    tree array_type, array, var;
+    vec<constructor_elt, va_gc> *v = NULL;
+    static const int noptions = 7;
+
+    /* Passing a new option to the library requires three modifications:
+          + add it to the tree_cons list below
+          + change the noptions variable above
+          + modify the library (runtime/compile_options.c)!  */
+
+    CONSTRUCTOR_APPEND_ELT (v, NULL_TREE,
+                            build_int_cst (integer_type_node,
+                                           gfc_option.warn_std));
+    CONSTRUCTOR_APPEND_ELT (v, NULL_TREE,
+                            build_int_cst (integer_type_node,
+                                           gfc_option.allow_std));
+    CONSTRUCTOR_APPEND_ELT (v, NULL_TREE,
+                            build_int_cst (integer_type_node, pedantic));
+    CONSTRUCTOR_APPEND_ELT (v, NULL_TREE,
+                            build_int_cst (integer_type_node, flag_backtrace));
+    CONSTRUCTOR_APPEND_ELT (v, NULL_TREE,
+                            build_int_cst (integer_type_node, flag_sign_zero));
+    CONSTRUCTOR_APPEND_ELT (v, NULL_TREE,
+                            build_int_cst (integer_type_node,
+                                           (gfc_option.rtcheck
+                                            & GFC_RTCHECK_BOUNDS)));
+    CONSTRUCTOR_APPEND_ELT (v, NULL_TREE,
+                            build_int_cst (integer_type_node,
+                                           gfc_option.fpe_summary));
+
+    array_type = build_array_type_nelts (integer_type_node, noptions);
+    array = build_constructor (array_type, v);
+    TREE_CONSTANT (array) = 1;
+    TREE_STATIC (array) = 1;
+
+    /* Create a static variable to hold the jump table.  */
+    var = build_decl (input_location, VAR_DECL,
+		      create_tmp_var_name ("options"), array_type);
+    DECL_ARTIFICIAL (var) = 1;
+    DECL_IGNORED_P (var) = 1;
+    TREE_CONSTANT (var) = 1;
+    TREE_STATIC (var) = 1;
+    TREE_READONLY (var) = 1;
+    DECL_INITIAL (var) = array;
+    pushdecl (var);
+    var = gfc_build_addr_expr (build_pointer_type (integer_type_node), var);
+
+    tmp = build_call_expr_loc (input_location,
+			   gfor_fndecl_set_options, 2,
+			   build_int_cst (integer_type_node, noptions), var);
+    gfc_add_expr_to_block (&body, tmp);
+  }
+
+  /* If -ffpe-trap option was provided, add a call to set_fpe so that
+     the library will raise a FPE when needed.  */
+  if (gfc_option.fpe != 0)
+    {
+      tmp = build_call_expr_loc (input_location,
+			     gfor_fndecl_set_fpe, 1,
+			     build_int_cst (integer_type_node,
+					    gfc_option.fpe));
+      gfc_add_expr_to_block (&body, tmp);
+    }
+
+  /* If this is the main program and an -fconvert option was provided,
+     add a call to set_convert.  */
+
+  if (flag_convert != GFC_FLAG_CONVERT_NATIVE)
+    {
+      tmp = build_call_expr_loc (input_location,
+			     gfor_fndecl_set_convert, 1,
+			     build_int_cst (integer_type_node, flag_convert));
+      gfc_add_expr_to_block (&body, tmp);
+    }
+
+  /* If this is the main program and an -frecord-marker option was provided,
+     add a call to set_record_marker.  */
+
+  if (flag_record_marker != 0)
+    {
+      tmp = build_call_expr_loc (input_location,
+			     gfor_fndecl_set_record_marker, 1,
+			     build_int_cst (integer_type_node,
+					    flag_record_marker));
+      gfc_add_expr_to_block (&body, tmp);
+    }
+
+  if (flag_max_subrecord_length != 0)
+    {
+      tmp = build_call_expr_loc (input_location,
+			     gfor_fndecl_set_max_subrecord_length, 1,
+			     build_int_cst (integer_type_node,
+					    flag_max_subrecord_length));
+      gfc_add_expr_to_block (&body, tmp);
+    }
+
+  /* Call MAIN__().  */
+  tmp = build_call_expr_loc (input_location,
+			 fndecl, 0);
+  gfc_add_expr_to_block (&body, tmp);
+
+  /* Mark MAIN__ as used.  */
+  TREE_USED (fndecl) = 1;
+
+  /* Coarray: Call _gfortran_caf_finalize(void).  */
+  if (flag_coarray == GFC_FCOARRAY_LIB)
+    {
+      tmp = build_call_expr_loc (input_location, gfor_fndecl_caf_finalize, 0);
+      gfc_add_expr_to_block (&body, tmp);
+    }
+
+  /* "return 0".  */
+  tmp = fold_build2_loc (input_location, MODIFY_EXPR, integer_type_node,
+			 DECL_RESULT (ftn_main),
+			 build_int_cst (integer_type_node, 0));
+  tmp = build1_v (RETURN_EXPR, tmp);
+  gfc_add_expr_to_block (&body, tmp);
+
+
+  DECL_SAVED_TREE (ftn_main) = gfc_finish_block (&body);
+  decl = getdecls ();
+
+  /* Finish off this function and send it for code generation.  */
+  poplevel (1, 1);
+  BLOCK_SUPERCONTEXT (DECL_INITIAL (ftn_main)) = ftn_main;
+
+  DECL_SAVED_TREE (ftn_main)
+    = build3_v (BIND_EXPR, decl, DECL_SAVED_TREE (ftn_main),
+		DECL_INITIAL (ftn_main));
+
+  /* Output the GENERIC tree.  */
+  dump_function (TDI_original, ftn_main);
+
+  cgraph_node::finalize_function (ftn_main, true);
+
+  if (old_context)
+    {
+      pop_function_context ();
+      saved_function_decls = saved_parent_function_decls;
+    }
+  current_function_decl = old_context;
+}
+
+
+/* Get the result expression for a procedure.  */
+
+static tree
+get_proc_result (gfc_symbol* sym)
+{
+  if (sym->attr.subroutine || sym == sym->result)
+    {
+      if (current_fake_result_decl != NULL)
+	return TREE_VALUE (current_fake_result_decl);
+
+      return NULL_TREE;
+    }
+
+  return sym->result->backend_decl;
+}
+
+
+/* Generate an appropriate return-statement for a procedure.  */
+
+tree
+gfc_generate_return (void)
+{
+  gfc_symbol* sym;
+  tree result;
+  tree fndecl;
+
+  sym = current_procedure_symbol;
+  fndecl = sym->backend_decl;
+
+  if (TREE_TYPE (DECL_RESULT (fndecl)) == void_type_node)
+    result = NULL_TREE;
+  else
+    {
+      result = get_proc_result (sym);
+
+      /* Set the return value to the dummy result variable.  The
+	 types may be different for scalar default REAL functions
+	 with -ff2c, therefore we have to convert.  */
+      if (result != NULL_TREE)
+	{
+	  result = convert (TREE_TYPE (DECL_RESULT (fndecl)), result);
+	  result = fold_build2_loc (input_location, MODIFY_EXPR,
+				    TREE_TYPE (result), DECL_RESULT (fndecl),
+				    result);
+	}
+    }
+
+  return build1_v (RETURN_EXPR, result);
+}
+
+
+static void
+is_from_ieee_module (gfc_symbol *sym)
+{
+  if (sym->from_intmod == INTMOD_IEEE_FEATURES
+      || sym->from_intmod == INTMOD_IEEE_EXCEPTIONS
+      || sym->from_intmod == INTMOD_IEEE_ARITHMETIC)
+    seen_ieee_symbol = 1;
+}
+
+
+static int
+is_ieee_module_used (gfc_namespace *ns)
+{
+  seen_ieee_symbol = 0;
+  gfc_traverse_ns (ns, is_from_ieee_module);
+  return seen_ieee_symbol;
+}
+
+
+static gfc_omp_clauses *module_oacc_clauses;
+
+
+static void
+add_clause (gfc_symbol *sym, gfc_omp_map_op map_op)
+{
+  gfc_omp_namelist *n;
+
+  n = gfc_get_omp_namelist ();
+  n->sym = sym;
+  n->u.map_op = map_op;
+
+  if (!module_oacc_clauses)
+    module_oacc_clauses = gfc_get_omp_clauses ();
+
+  if (module_oacc_clauses->lists[OMP_LIST_MAP])
+    n->next = module_oacc_clauses->lists[OMP_LIST_MAP];
+
+  module_oacc_clauses->lists[OMP_LIST_MAP] = n;
+}
+
+
+static void
+find_module_oacc_declare_clauses (gfc_symbol *sym)
+{
+  if (sym->attr.use_assoc)
+    {
+      gfc_omp_map_op map_op;
+
+      if (sym->attr.oacc_declare_create)
+	map_op = OMP_MAP_FORCE_ALLOC;
+
+      if (sym->attr.oacc_declare_copyin)
+	map_op = OMP_MAP_FORCE_TO;
+
+      if (sym->attr.oacc_declare_deviceptr)
+	map_op = OMP_MAP_FORCE_DEVICEPTR;
+
+      if (sym->attr.oacc_declare_device_resident)
+	map_op = OMP_MAP_DEVICE_RESIDENT;
+
+      if (sym->attr.oacc_declare_create
+	  || sym->attr.oacc_declare_copyin
+	  || sym->attr.oacc_declare_deviceptr
+	  || sym->attr.oacc_declare_device_resident)
+	{
+	  sym->attr.referenced = 1;
+	  add_clause (sym, map_op);
+	}
+    }
+}
+
+
+void
+finish_oacc_declare (gfc_namespace *ns, gfc_symbol *sym, bool block)
+{
+  gfc_code *code;
+  gfc_oacc_declare *oc;
+  locus where = gfc_current_locus;
+  gfc_omp_clauses *omp_clauses = NULL;
+  gfc_omp_namelist *n, *p;
+
+  gfc_traverse_ns (ns, find_module_oacc_declare_clauses);
+
+  if (module_oacc_clauses && sym->attr.flavor == FL_PROGRAM)
+    {
+      gfc_oacc_declare *new_oc;
+
+      new_oc = gfc_get_oacc_declare ();
+      new_oc->next = ns->oacc_declare;
+      new_oc->clauses = module_oacc_clauses;
+
+      ns->oacc_declare = new_oc;
+      module_oacc_clauses = NULL;
+    }
+
+  if (!ns->oacc_declare)
+    return;
+
+  for (oc = ns->oacc_declare; oc; oc = oc->next)
+    {
+      if (oc->module_var)
+	continue;
+
+      if (block)
+	gfc_error ("Sorry, !$ACC DECLARE at %L is not allowed "
+		   "in BLOCK construct", &oc->loc);
+
+
+      if (oc->clauses && oc->clauses->lists[OMP_LIST_MAP])
+	{
+	  if (omp_clauses == NULL)
+	    {
+	      omp_clauses = oc->clauses;
+	      continue;
+	    }
+
+	  for (n = oc->clauses->lists[OMP_LIST_MAP]; n; p = n, n = n->next)
+	    ;
+
+	  gcc_assert (p->next == NULL);
+
+	  p->next = omp_clauses->lists[OMP_LIST_MAP];
+	  omp_clauses = oc->clauses;
+	}
+    }
+
+  if (!omp_clauses)
+    return;
+
+  for (n = omp_clauses->lists[OMP_LIST_MAP]; n; n = n->next)
+    {
+      switch (n->u.map_op)
+	{
+	  case OMP_MAP_DEVICE_RESIDENT:
+	    n->u.map_op = OMP_MAP_FORCE_ALLOC;
+	    break;
+
+	  default:
+	    break;
+	}
+    }
+
+  code = XCNEW (gfc_code);
+  code->op = EXEC_OACC_DECLARE;
+  code->loc = where;
+
+  code->ext.oacc_declare = gfc_get_oacc_declare ();
+  code->ext.oacc_declare->clauses = omp_clauses;
+
+  code->block = XCNEW (gfc_code);
+  code->block->op = EXEC_OACC_DECLARE;
+  code->block->loc = where;
+
+  if (ns->code)
+    code->block->next = ns->code;
+
+  ns->code = code;
+
+  return;
+}
+
+
+/* Generate code for a function.  */
+
+void
+gfc_generate_function_code (gfc_namespace * ns)
+{
+  tree fndecl;
+  tree old_context;
+  tree decl;
+  tree tmp;
+  tree fpstate = NULL_TREE;
+  stmtblock_t init, cleanup;
+  stmtblock_t body;
+  gfc_wrapped_block try_block;
+  tree recurcheckvar = NULL_TREE;
+  gfc_symbol *sym;
+  gfc_symbol *previous_procedure_symbol;
+  int rank, ieee;
+  bool is_recursive;
+
+  sym = ns->proc_name;
+  previous_procedure_symbol = current_procedure_symbol;
+  current_procedure_symbol = sym;
+
+  /* Initialize sym->tlink so that gfc_trans_deferred_vars does not get
+     lost or worse.  */
+  sym->tlink = sym;
+
+  /* Create the declaration for functions with global scope.  */
+  if (!sym->backend_decl)
+    gfc_create_function_decl (ns, false);
+
+  fndecl = sym->backend_decl;
+  old_context = current_function_decl;
+
+  if (old_context)
+    {
+      push_function_context ();
+      saved_parent_function_decls = saved_function_decls;
+      saved_function_decls = NULL_TREE;
+    }
+
+  trans_function_start (sym);
+
+  gfc_init_block (&init);
+
+  if (ns->entries && ns->proc_name->ts.type == BT_CHARACTER)
+    {
+      /* Copy length backend_decls to all entry point result
+	 symbols.  */
+      gfc_entry_list *el;
+      tree backend_decl;
+
+      gfc_conv_const_charlen (ns->proc_name->ts.u.cl);
+      backend_decl = ns->proc_name->result->ts.u.cl->backend_decl;
+      for (el = ns->entries; el; el = el->next)
+	el->sym->result->ts.u.cl->backend_decl = backend_decl;
+    }
+
+  /* Translate COMMON blocks.  */
+  gfc_trans_common (ns);
+
+  /* Null the parent fake result declaration if this namespace is
+     a module function or an external procedures.  */
+  if ((ns->parent && ns->parent->proc_name->attr.flavor == FL_MODULE)
+	|| ns->parent == NULL)
+    parent_fake_result_decl = NULL_TREE;
+
+  gfc_generate_contained_functions (ns);
+
+  nonlocal_dummy_decls = NULL;
+  nonlocal_dummy_decl_pset = NULL;
+
+  has_coarray_vars = false;
+  generate_local_vars (ns);
+
+  if (flag_coarray == GFC_FCOARRAY_LIB && has_coarray_vars)
+    generate_coarray_init (ns);
+
+  /* Keep the parent fake result declaration in module functions
+     or external procedures.  */
+  if ((ns->parent && ns->parent->proc_name->attr.flavor == FL_MODULE)
+	|| ns->parent == NULL)
+    current_fake_result_decl = parent_fake_result_decl;
+  else
+    current_fake_result_decl = NULL_TREE;
+
+  is_recursive = sym->attr.recursive
+		 || (sym->attr.entry_master
+		     && sym->ns->entries->sym->attr.recursive);
+  if ((gfc_option.rtcheck & GFC_RTCHECK_RECURSION)
+      && !is_recursive && !flag_recursive)
+    {
+      char * msg;
+
+      msg = xasprintf ("Recursive call to nonrecursive procedure '%s'",
+		       sym->name);
+      recurcheckvar = gfc_create_var (boolean_type_node, "is_recursive");
+      TREE_STATIC (recurcheckvar) = 1;
+      DECL_INITIAL (recurcheckvar) = boolean_false_node;
+      gfc_add_expr_to_block (&init, recurcheckvar);
+      gfc_trans_runtime_check (true, false, recurcheckvar, &init,
+			       &sym->declared_at, msg);
+      gfc_add_modify (&init, recurcheckvar, boolean_true_node);
+      free (msg);
+    }
+
+  /* Check if an IEEE module is used in the procedure.  If so, save
+     the floating point state.  */
+  ieee = is_ieee_module_used (ns);
+  if (ieee)
+    fpstate = gfc_save_fp_state (&init);
+
+  /* Now generate the code for the body of this function.  */
+  gfc_init_block (&body);
+
+  if (TREE_TYPE (DECL_RESULT (fndecl)) != void_type_node
+	&& sym->attr.subroutine)
+    {
+      tree alternate_return;
+      alternate_return = gfc_get_fake_result_decl (sym, 0);
+      gfc_add_modify (&body, alternate_return, integer_zero_node);
+    }
+
+  if (ns->entries)
+    {
+      /* Jump to the correct entry point.  */
+      tmp = gfc_trans_entry_master_switch (ns->entries);
+      gfc_add_expr_to_block (&body, tmp);
+    }
+
+  /* If bounds-checking is enabled, generate code to check passed in actual
+     arguments against the expected dummy argument attributes (e.g. string
+     lengths).  */
+  if ((gfc_option.rtcheck & GFC_RTCHECK_BOUNDS) && !sym->attr.is_bind_c)
+    add_argument_checking (&body, sym);
+
+  finish_oacc_declare (ns, sym, false);
+
+  tmp = gfc_trans_code (ns->code);
+  gfc_add_expr_to_block (&body, tmp);
+
+  if (TREE_TYPE (DECL_RESULT (fndecl)) != void_type_node
+      || (sym->result && sym->result != sym
+	  && sym->result->ts.type == BT_DERIVED
+	  && sym->result->ts.u.derived->attr.alloc_comp))
+    {
+      bool artificial_result_decl = false;
+      tree result = get_proc_result (sym);
+      gfc_symbol *rsym = sym == sym->result ? sym : sym->result;
+
+      /* Make sure that a function returning an object with
+	 alloc/pointer_components always has a result, where at least
+	 the allocatable/pointer components are set to zero.  */
+      if (result == NULL_TREE && sym->attr.function
+	  && ((sym->result->ts.type == BT_DERIVED
+	       && (sym->attr.allocatable
+		   || sym->attr.pointer
+		   || sym->result->ts.u.derived->attr.alloc_comp
+		   || sym->result->ts.u.derived->attr.pointer_comp))
+	      || (sym->result->ts.type == BT_CLASS
+		  && (CLASS_DATA (sym)->attr.allocatable
+		      || CLASS_DATA (sym)->attr.class_pointer
+		      || CLASS_DATA (sym->result)->attr.alloc_comp
+		      || CLASS_DATA (sym->result)->attr.pointer_comp))))
+	{
+	  artificial_result_decl = true;
+	  result = gfc_get_fake_result_decl (sym, 0);
+	}
+
+      if (result != NULL_TREE && sym->attr.function && !sym->attr.pointer)
+	{
+	  if (sym->attr.allocatable && sym->attr.dimension == 0
+	      && sym->result == sym)
+	    gfc_add_modify (&init, result, fold_convert (TREE_TYPE (result),
+							 null_pointer_node));
+	  else if (sym->ts.type == BT_CLASS
+		   && CLASS_DATA (sym)->attr.allocatable
+		   && CLASS_DATA (sym)->attr.dimension == 0
+		   && sym->result == sym)
+	    {
+	      tmp = CLASS_DATA (sym)->backend_decl;
+	      tmp = fold_build3_loc (input_location, COMPONENT_REF,
+				     TREE_TYPE (tmp), result, tmp, NULL_TREE);
+	      gfc_add_modify (&init, tmp, fold_convert (TREE_TYPE (tmp),
+							null_pointer_node));
+	    }
+	  else if (sym->ts.type == BT_DERIVED
+		   && !sym->attr.allocatable)
+	    {
+	      gfc_expr *init_exp;
+	      /* Arrays are not initialized using the default initializer of
+		 their elements.  Therefore only check if a default
+		 initializer is available when the result is scalar.  */
+              init_exp = rsym->as ? NULL
+                                  : gfc_generate_initializer (&rsym->ts, true);
+	      if (init_exp)
+		{
+		  tmp = gfc_trans_structure_assign (result, init_exp, 0);
+		  gfc_free_expr (init_exp);
+		  gfc_add_expr_to_block (&init, tmp);
+		}
+	      else if (rsym->ts.u.derived->attr.alloc_comp)
+		{
+		  rank = rsym->as ? rsym->as->rank : 0;
+		  tmp = gfc_nullify_alloc_comp (rsym->ts.u.derived, result,
+						rank);
+		  gfc_prepend_expr_to_block (&body, tmp);
+		}
+	    }
+	}
+
+      if (result == NULL_TREE || artificial_result_decl)
+	{
+	  /* TODO: move to the appropriate place in resolve.c.  */
+	  if (warn_return_type && sym == sym->result)
+	    gfc_warning (OPT_Wreturn_type,
+			 "Return value of function %qs at %L not set",
+			 sym->name, &sym->declared_at);
+	  if (warn_return_type)
+	    TREE_NO_WARNING(sym->backend_decl) = 1;
+	}
+      if (result != NULL_TREE)
+	gfc_add_expr_to_block (&body, gfc_generate_return ());
+    }
+
+  gfc_init_block (&cleanup);
+
+  /* Reset recursion-check variable.  */
+  if ((gfc_option.rtcheck & GFC_RTCHECK_RECURSION)
+      && !is_recursive && !flag_openmp && recurcheckvar != NULL_TREE)
+    {
+      gfc_add_modify (&cleanup, recurcheckvar, boolean_false_node);
+      recurcheckvar = NULL;
+    }
+
+  /* If IEEE modules are loaded, restore the floating-point state.  */
+  if (ieee)
+    gfc_restore_fp_state (&cleanup, fpstate);
+
+  /* Finish the function body and add init and cleanup code.  */
+  tmp = gfc_finish_block (&body);
+  gfc_start_wrapped_block (&try_block, tmp);
+  /* Add code to create and cleanup arrays.  */
+  gfc_trans_deferred_vars (sym, &try_block);
+  gfc_add_init_cleanup (&try_block, gfc_finish_block (&init),
+			gfc_finish_block (&cleanup));
+
+  /* Add all the decls we created during processing.  */
+  decl = nreverse (saved_function_decls);
+  while (decl)
+    {
+      tree next;
+
+      next = DECL_CHAIN (decl);
+      DECL_CHAIN (decl) = NULL_TREE;
+      pushdecl (decl);
+      decl = next;
+    }
+  saved_function_decls = NULL_TREE;
+
+  DECL_SAVED_TREE (fndecl) = gfc_finish_wrapped_block (&try_block);
+  decl = getdecls ();
+
+  /* Finish off this function and send it for code generation.  */
+  poplevel (1, 1);
+  BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
+
+  DECL_SAVED_TREE (fndecl)
+    = build3_v (BIND_EXPR, decl, DECL_SAVED_TREE (fndecl),
+		DECL_INITIAL (fndecl));
+
+  if (nonlocal_dummy_decls)
+    {
+      BLOCK_VARS (DECL_INITIAL (fndecl))
+	= chainon (BLOCK_VARS (DECL_INITIAL (fndecl)), nonlocal_dummy_decls);
+      delete nonlocal_dummy_decl_pset;
+      nonlocal_dummy_decls = NULL;
+      nonlocal_dummy_decl_pset = NULL;
+    }
+
+  /* Output the GENERIC tree.  */
+  dump_function (TDI_original, fndecl);
+
+  /* Store the end of the function, so that we get good line number
+     info for the epilogue.  */
+  cfun->function_end_locus = input_location;
+
+  /* We're leaving the context of this function, so zap cfun.
+     It's still in DECL_STRUCT_FUNCTION, and we'll restore it in
+     tree_rest_of_compilation.  */
+  set_cfun (NULL);
+
+  if (old_context)
+    {
+      pop_function_context ();
+      saved_function_decls = saved_parent_function_decls;
+    }
+  current_function_decl = old_context;
+
+  if (decl_function_context (fndecl))
+    {
+      /* Register this function with cgraph just far enough to get it
+	 added to our parent's nested function list.
+	 If there are static coarrays in this function, the nested _caf_init
+	 function has already called cgraph_create_node, which also created
+	 the cgraph node for this function.  */
+      if (!has_coarray_vars || flag_coarray != GFC_FCOARRAY_LIB)
+	(void) cgraph_node::get_create (fndecl);
+    }
+  else
+    cgraph_node::finalize_function (fndecl, true);
+
+  gfc_trans_use_stmts (ns);
+  gfc_traverse_ns (ns, gfc_emit_parameter_debug_info);
+
+  if (sym->attr.is_main_program)
+    create_main_function (fndecl);
+
+  current_procedure_symbol = previous_procedure_symbol;
+}
+
+
+void
+gfc_generate_constructors (void)
+{
+  gcc_assert (gfc_static_ctors == NULL_TREE);
+#if 0
+  tree fnname;
+  tree type;
+  tree fndecl;
+  tree decl;
+  tree tmp;
+
+  if (gfc_static_ctors == NULL_TREE)
+    return;
+
+  fnname = get_file_function_name ("I");
+  type = build_function_type_list (void_type_node, NULL_TREE);
+
+  fndecl = build_decl (input_location,
+		       FUNCTION_DECL, fnname, type);
+  TREE_PUBLIC (fndecl) = 1;
+
+  decl = build_decl (input_location,
+		     RESULT_DECL, NULL_TREE, void_type_node);
+  DECL_ARTIFICIAL (decl) = 1;
+  DECL_IGNORED_P (decl) = 1;
+  DECL_CONTEXT (decl) = fndecl;
+  DECL_RESULT (fndecl) = decl;
+
+  pushdecl (fndecl);
+
+  current_function_decl = fndecl;
+
+  rest_of_decl_compilation (fndecl, 1, 0);
+
+  make_decl_rtl (fndecl);
+
+  allocate_struct_function (fndecl, false);
+
+  pushlevel ();
+
+  for (; gfc_static_ctors; gfc_static_ctors = TREE_CHAIN (gfc_static_ctors))
+    {
+      tmp = build_call_expr_loc (input_location,
+			     TREE_VALUE (gfc_static_ctors), 0);
+      DECL_SAVED_TREE (fndecl) = build_stmt (input_location, EXPR_STMT, tmp);
+    }
+
+  decl = getdecls ();
+  poplevel (1, 1);
+
+  BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
+  DECL_SAVED_TREE (fndecl)
+    = build3_v (BIND_EXPR, decl, DECL_SAVED_TREE (fndecl),
+		DECL_INITIAL (fndecl));
+
+  free_after_parsing (cfun);
+  free_after_compilation (cfun);
+
+  tree_rest_of_compilation (fndecl);
+
+  current_function_decl = NULL_TREE;
+#endif
+}
+
+/* Translates a BLOCK DATA program unit. This means emitting the
+   commons contained therein plus their initializations. We also emit
+   a globally visible symbol to make sure that each BLOCK DATA program
+   unit remains unique.  */
+
+void
+gfc_generate_block_data (gfc_namespace * ns)
+{
+  tree decl;
+  tree id;
+
+  /* Tell the backend the source location of the block data.  */
+  if (ns->proc_name)
+    gfc_set_backend_locus (&ns->proc_name->declared_at);
+  else
+    gfc_set_backend_locus (&gfc_current_locus);
+
+  /* Process the DATA statements.  */
+  gfc_trans_common (ns);
+
+  /* Create a global symbol with the mane of the block data.  This is to
+     generate linker errors if the same name is used twice.  It is never
+     really used.  */
+  if (ns->proc_name)
+    id = gfc_sym_mangled_function_id (ns->proc_name);
+  else
+    id = get_identifier ("__BLOCK_DATA__");
+
+  decl = build_decl (input_location,
+		     VAR_DECL, id, gfc_array_index_type);
+  TREE_PUBLIC (decl) = 1;
+  TREE_STATIC (decl) = 1;
+  DECL_IGNORED_P (decl) = 1;
+
+  pushdecl (decl);
+  rest_of_decl_compilation (decl, 1, 0);
+}
+
+
+/* Process the local variables of a BLOCK construct.  */
+
+void
+gfc_process_block_locals (gfc_namespace* ns)
+{
+  tree decl;
+
+  gcc_assert (saved_local_decls == NULL_TREE);
+  has_coarray_vars = false;
+
+  generate_local_vars (ns);
+
+  if (flag_coarray == GFC_FCOARRAY_LIB && has_coarray_vars)
+    generate_coarray_init (ns);
+
+  decl = nreverse (saved_local_decls);
+  while (decl)
+    {
+      tree next;
+
+      next = DECL_CHAIN (decl);
+      DECL_CHAIN (decl) = NULL_TREE;
+      pushdecl (decl);
+      decl = next;
+    }
+  saved_local_decls = NULL_TREE;
+}
+
+
+#include "gt-fortran-trans-decl.h"