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/* Header for code translation functions

   Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,

   2011, 2012

   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/>.  */

#ifndef GFC_TRANS_H

#define GFC_TRANS_H

/* Mangled symbols take the form __module__name.  */

#define GFC_MAX_MANGLED_SYMBOL_LEN  (GFC_MAX_SYMBOL_LEN*2+4)

/* Struct for holding a block of statements.  It should be treated as an

   opaque entity and not modified directly.  This allows us to change the

   underlying representation of statement lists.  */

typedef struct

{

  tree head;

  unsigned int has_scope:1;

}

stmtblock_t;

/* a simplified expression */

typedef struct gfc_se

{

  /* Code blocks to be executed before and after using the value.  */

  stmtblock_t pre;

  stmtblock_t post;

  /* the result of the expression */

  tree expr;

  /* The length of a character string value.  */

  tree string_length;

  /* If set gfc_conv_variable will return an expression for the array

     descriptor. When set, want_pointer should also be set.

     If not set scalarizing variables will be substituted.  */

  unsigned descriptor_only:1;

  /* When this is set gfc_conv_expr returns the address of a variable.  Only

     applies to EXPR_VARIABLE nodes.

     Also used by gfc_conv_array_parameter. When set this indicates a pointer

     to the descriptor should be returned, rather than the descriptor itself.

   */

  unsigned want_pointer:1;

  /* An array function call returning without a temporary.  Also used for array

     pointer assignments.  */

  unsigned direct_byref:1;

  /* If direct_byref is set, do work out the descriptor as in that case but

     do still create a new descriptor variable instead of using an

     existing one.  This is useful for special pointer assignments like

     rank remapping where we have to process the descriptor before

     assigning to final one.  */

  unsigned byref_noassign:1;

  /* Ignore absent optional arguments.  Used for some intrinsics.  */

  unsigned ignore_optional:1;

  /* When this is set the data and offset fields of the returned descriptor

     are NULL.  Used by intrinsic size.  */

  unsigned data_not_needed:1;

  /* If set, gfc_conv_procedure_call does not put byref calls into se->pre.  */

  unsigned no_function_call:1;

  /* If set, we will force the creation of a temporary. Useful to disable

     non-copying procedure argument passing optimizations, when some function

     args alias.  */

  unsigned force_tmp:1;

  unsigned want_coarray:1;

  /* Scalarization parameters.  */

  struct gfc_se *parent;

  struct gfc_ss *ss;

  struct gfc_loopinfo *loop;

}

gfc_se;

/* Denotes different types of coarray.

   Please keep in sync with libgfortran/caf/libcaf.h.  */

typedef enum

{

  GFC_CAF_COARRAY_STATIC,

  GFC_CAF_COARRAY_ALLOC,

  GFC_CAF_LOCK,

  GFC_CAF_LOCK_COMP

}

gfc_coarray_type;

/* The array-specific scalarization informations.  The array members of

   this struct are indexed by actual array index, and thus can be sparse.  */

typedef struct gfc_array_info

{

  mpz_t *shape;

  /* The ref that holds information on this section.  */

  gfc_ref *ref;

  /* The descriptor of this array.  */

  tree descriptor;

  /* holds the pointer to the data array.  */

  tree data;

  /* To move some of the array index calculation out of the innermost loop.  */

  tree offset;

  tree saved_offset;

  tree stride0;

  /* Holds the SS for a subscript.  Indexed by actual dimension.  */

  struct gfc_ss *subscript[GFC_MAX_DIMENSIONS];

  /* stride and delta are used to access this inside a scalarization loop.

     start is used in the calculation of these.  Indexed by scalarizer

     dimension.  */

  tree start[GFC_MAX_DIMENSIONS];

  tree end[GFC_MAX_DIMENSIONS];

  tree stride[GFC_MAX_DIMENSIONS];

  tree delta[GFC_MAX_DIMENSIONS];

}

gfc_array_info;

typedef enum

{

  /* A scalar value.  This will be evaluated before entering the

     scalarization loop.  */

  GFC_SS_SCALAR,

  /* Like GFC_SS_SCALAR it evaluates the expression outside the

     loop.  Is always evaluated as a reference to the temporary, unless

     temporary evaluation can result in a NULL pointer dereferencing (case of

     optional arguments).  Used for elemental function arguments.  */

  GFC_SS_REFERENCE,

  /* An array section.  Scalarization indices will be substituted during

     expression translation.  */

  GFC_SS_SECTION,

  /* A non-elemental function call returning an array.  The call is executed

     before entering the scalarization loop, storing the result in a

     temporary.  This temporary is then used inside the scalarization loop.

     Simple assignments, e.g. a(:) = fn(), are handled without a temporary

     as a special case.  */

  GFC_SS_FUNCTION,

  /* An array constructor.  The current implementation is sub-optimal in

     many cases.  It allocated a temporary, assigns the values to it, then

     uses this temporary inside the scalarization loop.  */

  GFC_SS_CONSTRUCTOR,

  /* A vector subscript.  The vector's descriptor is cached in the

     "descriptor" field of the associated gfc_ss_info.  */

  GFC_SS_VECTOR,

  /* A temporary array allocated by the scalarizer.  Its rank can be less

     than that of the assignment expression.  */

  GFC_SS_TEMP,

  /* An intrinsic function call.  Many intrinsic functions which map directly

     to library calls are created as GFC_SS_FUNCTION nodes.  */

  GFC_SS_INTRINSIC,

  /* A component of a derived type.  */

  GFC_SS_COMPONENT

}

gfc_ss_type;

typedef struct gfc_ss_info

{

  int refcount;

  gfc_ss_type type;

  gfc_expr *expr;

  tree string_length;

  union

  {

    /* If type is GFC_SS_SCALAR or GFC_SS_REFERENCE.  */

    struct

    {

      tree value;

      /* Tells whether the reference can be null in the GFC_SS_REFERENCE case.

         Used to handle elemental procedures' optional arguments.  */

      bool can_be_null_ref;

    }

    scalar;

    /* GFC_SS_TEMP.  */

    struct

    {

      tree type;

    }

    temp;

    /* All other types.  */

    gfc_array_info array;

  }

  data;

  /* This is used by assignments requiring temporaries.  The bits specify which

     loops the terms appear in.  This will be 1 for the RHS expressions,

     2 for the LHS expressions, and 3(=1|2) for the temporary.  */

  unsigned useflags:2;

  /* Suppresses precalculation of scalars in WHERE assignments.  */

  unsigned where:1;

}

gfc_ss_info;

#define gfc_get_ss_info() XCNEW (gfc_ss_info)

/* Scalarization State chain.  Created by walking an expression tree before

   creating the scalarization loops.  Then passed as part of a gfc_se structure

   to translate the expression inside the loop.  Note that these chains are

   terminated by gfc_ss_terminator, not NULL.  A NULL pointer in a gfc_se

   indicates to gfc_conv_* that this is a scalar expression.

   SS structures can only belong to a single loopinfo.  They must be added

   otherwise they will not get freed.  */

typedef struct gfc_ss

{

  gfc_ss_info *info;

  int dimen;

  /* Translation from loop dimensions to actual array dimensions.

     actual_dim = dim[loop_dim]  */

  int dim[GFC_MAX_DIMENSIONS];

  /* All the SS in a loop and linked through loop_chain.  The SS for an

     expression are linked by the next pointer.  */

  struct gfc_ss *loop_chain;

  struct gfc_ss *next;

  /* Non-null if the ss is part of a nested loop.  */

  struct gfc_ss *parent;

  /* If the evaluation of an expression requires a nested loop (for example

     if the sum intrinsic is evaluated inline), this points to the nested

     loop's gfc_ss.  */

  struct gfc_ss *nested_ss;

  /* The loop this gfc_ss is in.  */

  struct gfc_loopinfo *loop;

  unsigned is_alloc_lhs:1;

}

gfc_ss;

#define gfc_get_ss() XCNEW (gfc_ss)

/* The contents of this aren't actually used.  A NULL SS chain indicates a

   scalar expression, so this pointer is used to terminate SS chains.  */

extern gfc_ss * const gfc_ss_terminator;

/* Holds information about an expression while it is being scalarized.  */

typedef struct gfc_loopinfo

{

  stmtblock_t pre;

  stmtblock_t post;

  int dimen;

  /* All the SS involved with this loop.  */

  gfc_ss *ss;

  /* The SS describing the temporary used in an assignment.  */

  gfc_ss *temp_ss;

  /* Non-null if this loop is nested in another one.  */

  struct gfc_loopinfo *parent;

  /* Chain of nested loops.  */

  struct gfc_loopinfo *nested, *next;

  /* The scalarization loop index variables.  */

  tree loopvar[GFC_MAX_DIMENSIONS];

  /* The bounds of the scalarization loops.  */

  tree from[GFC_MAX_DIMENSIONS];

  tree to[GFC_MAX_DIMENSIONS];

  gfc_ss *specloop[GFC_MAX_DIMENSIONS];

  /* The code member contains the code for the body of the next outer loop.  */

  stmtblock_t code[GFC_MAX_DIMENSIONS];

  /* Order in which the dimensions should be looped, innermost first.  */

  int order[GFC_MAX_DIMENSIONS];

  /* Enum to control loop reversal.  */

  gfc_reverse reverse[GFC_MAX_DIMENSIONS];

  /* The number of dimensions for which a temporary is used.  */

  int temp_dim;

  /* If set we don't need the loop variables.  */

  unsigned array_parameter:1;

}

gfc_loopinfo;

#define gfc_get_loopinfo() XCNEW (gfc_loopinfo)

/* Information about a symbol that has been shadowed by a temporary.  */

typedef struct

{

  symbol_attribute attr;

  tree decl;

}

gfc_saved_var;

/* Store information about a block of code together with special

   initialization and clean-up code.  This can be used to incrementally add

   init and cleanup, and in the end put everything together to a

   try-finally expression.  */

typedef struct

{

  tree init;

  tree cleanup;

  tree code;

}

gfc_wrapped_block;

/* Class API functions.  */

tree gfc_class_data_get (tree);

tree gfc_class_vptr_get (tree);

tree gfc_vtable_hash_get (tree);

tree gfc_vtable_size_get (tree);

tree gfc_vtable_extends_get (tree);

tree gfc_vtable_def_init_get (tree);

tree gfc_vtable_copy_get (tree);

tree gfc_get_class_array_ref (tree, tree);

tree gfc_copy_class_to_class (tree, tree, tree);

void gfc_conv_class_to_class (gfc_se *, gfc_expr *, gfc_typespec, bool);

/* Initialize an init/cleanup block.  */

void gfc_start_wrapped_block (gfc_wrapped_block* block, tree code);

/* Add a pair of init/cleanup code to the block.  Each one might be a

   NULL_TREE if not required.  */

void gfc_add_init_cleanup (gfc_wrapped_block* block, tree init, tree cleanup);

/* Finalize the block, that is, create a single expression encapsulating the

   original code together with init and clean-up code.  */

tree gfc_finish_wrapped_block (gfc_wrapped_block* block);

/* Advance the SS chain to the next term.  */

void gfc_advance_se_ss_chain (gfc_se *);

/* Call this to initialize a gfc_se structure before use

   first parameter is structure to initialize, second is

   parent to get scalarization data from, or NULL.  */

void gfc_init_se (gfc_se *, gfc_se *);

/* Create an artificial variable decl and add it to the current scope.  */

tree gfc_create_var (tree, const char *);

/* Like above but doesn't add it to the current scope.  */

tree gfc_create_var_np (tree, const char *);

/* Store the result of an expression in a temp variable so it can be used

   repeatedly even if the original changes */

void gfc_make_safe_expr (gfc_se * se);

/* Makes sure se is suitable for passing as a function string parameter.  */

void gfc_conv_string_parameter (gfc_se * se);

/* Compare two strings.  */

tree gfc_build_compare_string (tree, tree, tree, tree, int, enum tree_code);

/* When using the gfc_conv_* make sure you understand what they do, i.e.

   when a POST chain may be created, and what the returned expression may be

   used for.  Note that character strings have special handling.  This

   should not be a problem as most statements/operations only deal with

   numeric/logical types.  See the implementations in trans-expr.c

   for details of the individual functions.  */

void gfc_conv_expr (gfc_se * se, gfc_expr * expr);

void gfc_conv_expr_val (gfc_se * se, gfc_expr * expr);

void gfc_conv_expr_lhs (gfc_se * se, gfc_expr * expr);

void gfc_conv_expr_reference (gfc_se * se, gfc_expr *);

void gfc_conv_expr_type (gfc_se * se, gfc_expr *, tree);

/* trans-expr.c */

void gfc_conv_scalar_char_value (gfc_symbol *sym, gfc_se *se, gfc_expr **expr);

tree gfc_string_to_single_character (tree len, tree str, int kind);

/* Find the decl containing the auxiliary variables for assigned variables.  */

void gfc_conv_label_variable (gfc_se * se, gfc_expr * expr);

/* If the value is not constant, Create a temporary and copy the value.  */

tree gfc_evaluate_now_loc (location_t, tree, stmtblock_t *);

tree gfc_evaluate_now (tree, stmtblock_t *);

/* Find the appropriate variant of a math intrinsic.  */

tree gfc_builtin_decl_for_float_kind (enum built_in_function, int);

/* Intrinsic procedure handling.  */

tree gfc_conv_intrinsic_subroutine (gfc_code *);

void gfc_conv_intrinsic_function (gfc_se *, gfc_expr *);

/* Does an intrinsic map directly to an external library call

   This is true for array-returning intrinsics, unless

   gfc_inline_intrinsic_function_p returns true.  */

int gfc_is_intrinsic_libcall (gfc_expr *);

/* Used to call ordinary functions/subroutines

   and procedure pointer components.  */

int gfc_conv_procedure_call (gfc_se *, gfc_symbol *, gfc_actual_arglist *,

                             gfc_expr *, VEC(tree,gc) *);

void gfc_conv_subref_array_arg (gfc_se *, gfc_expr *, int, sym_intent, bool);

/* gfc_trans_* shouldn't call push/poplevel, use gfc_push/pop_scope */

/* Generate code for a scalar assignment.  */

tree gfc_trans_scalar_assign (gfc_se *, gfc_se *, gfc_typespec, bool, bool,

                              bool);

/* Translate COMMON blocks.  */

void gfc_trans_common (gfc_namespace *);

/* Translate a derived type constructor.  */

void gfc_conv_structure (gfc_se *, gfc_expr *, int);

/* Return an expression which determines if a dummy parameter is present.  */

tree gfc_conv_expr_present (gfc_symbol *);

/* Convert a missing, dummy argument into a null or zero.  */

void gfc_conv_missing_dummy (gfc_se *, gfc_expr *, gfc_typespec, int);

/* Generate code to allocate a string temporary.  */

tree gfc_conv_string_tmp (gfc_se *, tree, tree);

/* Get the string length variable belonging to an expression.  */

tree gfc_get_expr_charlen (gfc_expr *);

/* Initialize a string length variable.  */

void gfc_conv_string_length (gfc_charlen *, gfc_expr *, stmtblock_t *);

/* Ensure type sizes can be gimplified.  */

void gfc_trans_vla_type_sizes (gfc_symbol *, stmtblock_t *);

/* Add an expression to the end of a block.  */

void gfc_add_expr_to_block (stmtblock_t *, tree);

/* Add an expression to the beginning of a block.  */

void gfc_prepend_expr_to_block (stmtblock_t *, tree);

/* Add a block to the end of a block.  */

void gfc_add_block_to_block (stmtblock_t *, stmtblock_t *);

/* Add a MODIFY_EXPR to a block.  */

void gfc_add_modify_loc (location_t, stmtblock_t *, tree, tree);

void gfc_add_modify (stmtblock_t *, tree, tree);

/* Initialize a statement block.  */

void gfc_init_block (stmtblock_t *);

/* Start a new statement block.  Like gfc_init_block but also starts a new

   variable scope.  */

void gfc_start_block (stmtblock_t *);

/* Finish a statement block.  Also closes the scope if the block was created

   with gfc_start_block.  */

tree gfc_finish_block (stmtblock_t *);

/* Merge the scope of a block with its parent.  */

void gfc_merge_block_scope (stmtblock_t * block);

/* Return the backend label decl.  */

tree gfc_get_label_decl (gfc_st_label *);

/* Return the decl for an external function.  */

tree gfc_get_extern_function_decl (gfc_symbol *);

/* Return the decl for a function.  */

tree gfc_get_function_decl (gfc_symbol *);

/* Build an ADDR_EXPR.  */

tree gfc_build_addr_expr (tree, tree);

/* Build an ARRAY_REF.  */

tree gfc_build_array_ref (tree, tree, tree);

/* Creates a label.  Decl is artificial if label_id == NULL_TREE.  */

tree gfc_build_label_decl (tree);

/* Return the decl used to hold the function return value.

   Do not use if the function has an explicit result variable.  */

tree gfc_get_fake_result_decl (gfc_symbol *, int);

/* Add a decl to the binding level for the current function.  */

void gfc_add_decl_to_function (tree);

/* Make prototypes for runtime library functions.  */

void gfc_build_builtin_function_decls (void);

/* Set the backend source location of a decl.  */

void gfc_set_decl_location (tree, locus *);

/* Get a module symbol backend_decl if possible.  */

bool gfc_get_module_backend_decl (gfc_symbol *);

/* Return the variable decl for a symbol.  */

tree gfc_get_symbol_decl (gfc_symbol *);

/* Build a static initializer.  */

tree gfc_conv_initializer (gfc_expr *, gfc_typespec *, tree, bool, bool, bool);

/* Assign a default initializer to a derived type.  */

void gfc_init_default_dt (gfc_symbol *, stmtblock_t *, bool);

/* Substitute a temporary variable in place of the real one.  */

void gfc_shadow_sym (gfc_symbol *, tree, gfc_saved_var *);

/* Restore the original variable.  */

void gfc_restore_sym (gfc_symbol *, gfc_saved_var *);

/* Setting a decl assembler name, mangling it according to target rules

   (like Windows @NN decorations).  */

void gfc_set_decl_assembler_name (tree, tree);

/* Returns true if a variable of specified size should go on the stack.  */

int gfc_can_put_var_on_stack (tree);

/* Allocate the lang-specific part of a decl node.  */

void gfc_allocate_lang_decl (tree);

/* Advance along a TREE_CHAIN.  */

tree gfc_advance_chain (tree, int);

/* Create a decl for a function.  */

void gfc_create_function_decl (gfc_namespace *, bool);

/* Generate the code for a function.  */

void gfc_generate_function_code (gfc_namespace *);

/* Output a BLOCK DATA program unit.  */

void gfc_generate_block_data (gfc_namespace *);

/* Output a decl for a module variable.  */

void gfc_generate_module_vars (gfc_namespace *);

/* Get the appropriate return statement for a procedure.  */

tree gfc_generate_return (void);

struct GTY(()) module_htab_entry {

  const char *name;

  tree namespace_decl;

  htab_t GTY ((param_is (union tree_node))) decls;

};

struct module_htab_entry *gfc_find_module (const char *);

void gfc_module_add_decl (struct module_htab_entry *, tree);

/* Get and set the current location.  */

void gfc_save_backend_locus (locus *);

void gfc_set_backend_locus (locus *);

void gfc_restore_backend_locus (locus *);

/* Handle static constructor functions.  */

extern GTY(()) tree gfc_static_ctors;

void gfc_generate_constructors (void);

/* Get the string length of an array constructor.  */

bool get_array_ctor_strlen (stmtblock_t *, gfc_constructor_base, tree *);

/* Mark a condition as likely or unlikely.  */

tree gfc_likely (tree);

tree gfc_unlikely (tree);

/* Generate a runtime error call.  */

tree gfc_trans_runtime_error (bool, locus*, const char*, ...);

/* Generate a runtime warning/error check.  */

void gfc_trans_runtime_check (bool, bool, tree, stmtblock_t *, locus *,

                              const char *, ...);

/* Generate a runtime check for same string length.  */

void gfc_trans_same_strlen_check (const char*, locus*, tree, tree,

                                  stmtblock_t*);

/* Generate a call to free() after checking that its arg is non-NULL.  */

tree gfc_call_free (tree);

/* Allocate memory after performing a few checks.  */

tree gfc_call_malloc (stmtblock_t *, tree, tree);

/* Build a memcpy call.  */

tree gfc_build_memcpy_call (tree, tree, tree);

/* Allocate memory for allocatable variables, with optional status variable.  */

void gfc_allocate_allocatable (stmtblock_t*, tree, tree, tree, tree,

                               tree, tree, tree, gfc_expr*);

/* Allocate memory, with optional status variable.  */

void gfc_allocate_using_malloc (stmtblock_t *, tree, tree, tree);

/* Generate code to deallocate an array.  */

tree gfc_deallocate_with_status (tree, tree, tree, tree, tree, bool,

                                 gfc_expr *, bool);

tree gfc_deallocate_scalar_with_status (tree, tree, bool, gfc_expr*, gfc_typespec);

/* Generate code to call realloc().  */

tree gfc_call_realloc (stmtblock_t *, tree, tree);

/* Generate code for an assignment, includes scalarization.  */

tree gfc_trans_assignment (gfc_expr *, gfc_expr *, bool, bool);

/* Generate code for a pointer assignment.  */

tree gfc_trans_pointer_assignment (gfc_expr *, gfc_expr *);

/* Initialize function decls for library functions.  */

void gfc_build_intrinsic_lib_fndecls (void);

/* Create function decls for IO library functions.  */

void gfc_trans_io_runtime_check (tree, tree, int, const char *, stmtblock_t *);

void gfc_build_io_library_fndecls (void);

/* Build a function decl for a library function.  */

tree gfc_build_library_function_decl (tree, tree, int, ...);

tree gfc_build_library_function_decl_with_spec (tree name, const char *spec,

                                                tree rettype, int nargs, ...);

/* Process the local variable decls of a block construct.  */

void gfc_process_block_locals (gfc_namespace*);

/* Output initialization/clean-up code that was deferred.  */

void gfc_trans_deferred_vars (gfc_symbol*, gfc_wrapped_block *);

/* In f95-lang.c.  */

tree pushdecl (tree);

tree pushdecl_top_level (tree);

void pushlevel (int);

tree poplevel (int, int, int);

tree getdecls (void);

tree gfc_truthvalue_conversion (tree);

tree gfc_builtin_function (tree);

/* In trans-types.c.  */

struct array_descr_info;

bool gfc_get_array_descr_info (const_tree, struct array_descr_info *);

/* In trans-openmp.c */

bool gfc_omp_privatize_by_reference (const_tree);

enum omp_clause_default_kind gfc_omp_predetermined_sharing (tree);

tree gfc_omp_report_decl (tree);

tree gfc_omp_clause_default_ctor (tree, tree, tree);

tree gfc_omp_clause_copy_ctor (tree, tree, tree);

tree gfc_omp_clause_assign_op (tree, tree, tree);

tree gfc_omp_clause_dtor (tree, tree);

bool gfc_omp_disregard_value_expr (tree, bool);

bool gfc_omp_private_debug_clause (tree, bool);

bool gfc_omp_private_outer_ref (tree);

struct gimplify_omp_ctx;

void gfc_omp_firstprivatize_type_sizes (struct gimplify_omp_ctx *, tree);

/* Runtime library function decls.  */

extern GTY(()) tree gfor_fndecl_pause_numeric;

extern GTY(()) tree gfor_fndecl_pause_string;

extern GTY(()) tree gfor_fndecl_stop_numeric;

extern GTY(()) tree gfor_fndecl_stop_numeric_f08;

extern GTY(()) tree gfor_fndecl_stop_string;

extern GTY(()) tree gfor_fndecl_error_stop_numeric;

extern GTY(()) tree gfor_fndecl_error_stop_string;

extern GTY(()) tree gfor_fndecl_runtime_error;

extern GTY(()) tree gfor_fndecl_runtime_error_at;

extern GTY(()) tree gfor_fndecl_runtime_warning_at;

extern GTY(()) tree gfor_fndecl_os_error;

extern GTY(()) tree gfor_fndecl_generate_error;

extern GTY(()) tree gfor_fndecl_set_fpe;

extern GTY(()) tree gfor_fndecl_set_options;

extern GTY(()) tree gfor_fndecl_ttynam;

extern GTY(()) tree gfor_fndecl_ctime;

extern GTY(()) tree gfor_fndecl_fdate;

extern GTY(()) tree gfor_fndecl_in_pack;

extern GTY(()) tree gfor_fndecl_in_unpack;

extern GTY(()) tree gfor_fndecl_associated;

/* Coarray run-time library function decls.  */

extern GTY(()) tree gfor_fndecl_caf_init;

extern GTY(()) tree gfor_fndecl_caf_finalize;

extern GTY(()) tree gfor_fndecl_caf_register;

extern GTY(()) tree gfor_fndecl_caf_deregister;

extern GTY(()) tree gfor_fndecl_caf_critical;

extern GTY(()) tree gfor_fndecl_caf_end_critical;

extern GTY(()) tree gfor_fndecl_caf_sync_all;

extern GTY(()) tree gfor_fndecl_caf_sync_images;

extern GTY(()) tree gfor_fndecl_caf_error_stop;

extern GTY(()) tree gfor_fndecl_caf_error_stop_str;

/* Coarray global variables for num_images/this_image.  */

extern GTY(()) tree gfort_gvar_caf_num_images;

extern GTY(()) tree gfort_gvar_caf_this_image;

/* Math functions.  Many other math functions are handled in

   trans-intrinsic.c.  */

typedef struct GTY(()) gfc_powdecl_list {

  tree integer;

  tree real;

  tree cmplx;

}

gfc_powdecl_list;

extern GTY(()) gfc_powdecl_list gfor_fndecl_math_powi[4][3];

extern GTY(()) tree gfor_fndecl_math_ishftc4;

extern GTY(()) tree gfor_fndecl_math_ishftc8;

extern GTY(()) tree gfor_fndecl_math_ishftc16;

/* BLAS functions.  */

extern GTY(()) tree gfor_fndecl_sgemm;

extern GTY(()) tree gfor_fndecl_dgemm;

extern GTY(()) tree gfor_fndecl_cgemm;

extern GTY(()) tree gfor_fndecl_zgemm;

/* String functions.  */

extern GTY(()) tree gfor_fndecl_compare_string;

extern GTY(()) tree gfor_fndecl_concat_string;

extern GTY(()) tree gfor_fndecl_string_len_trim;

extern GTY(()) tree gfor_fndecl_string_index;

extern GTY(()) tree gfor_fndecl_string_scan;

extern GTY(()) tree gfor_fndecl_string_verify;

extern GTY(()) tree gfor_fndecl_string_trim;

extern GTY(()) tree gfor_fndecl_string_minmax;

extern GTY(()) tree gfor_fndecl_adjustl;

extern GTY(()) tree gfor_fndecl_adjustr;

extern GTY(()) tree gfor_fndecl_select_string;