re PR fortran/82923 (Automatic allocation of deferred length character using function...

[thirdparty/gcc.git] / gcc / fortran / trans-array.h

/* Header for array handling functions
   Copyright (C) 2002-2018 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/>.  */

/* Generate code to initialize and allocate an array.  Statements are added to
   se, which should contain an expression for the array descriptor.  */
bool gfc_array_allocate (gfc_se *, gfc_expr *, tree, tree, tree, tree,
			 tree, tree *, gfc_expr *, tree, bool);

/* Allow the bounds of a loop to be set from a callee's array spec.  */
void gfc_set_loop_bounds_from_array_spec (gfc_interface_mapping *,
					  gfc_se *, gfc_array_spec *);

/* Generate code to create a temporary array.  */
tree gfc_trans_create_temp_array (stmtblock_t *, stmtblock_t *, gfc_ss *,
				  tree, tree, bool, bool, bool, locus *);

/* Generate function entry code for allocation of compiler allocated array
   variables.  */
void gfc_trans_auto_array_allocation (tree, gfc_symbol *, gfc_wrapped_block *);
/* Generate entry and exit code for dummy array parameters.  */
void gfc_trans_dummy_array_bias (gfc_symbol *, tree, gfc_wrapped_block *);
/* Generate entry and exit code for g77 calling convention arrays.  */
void gfc_trans_g77_array (gfc_symbol *, gfc_wrapped_block *);

tree gfc_full_array_size (stmtblock_t *, tree, int);

tree gfc_duplicate_allocatable (tree, tree, tree, int, tree);

tree gfc_copy_allocatable_data (tree dest, tree src, tree type, int rank);

tree gfc_duplicate_allocatable_nocopy (tree, tree, tree, int);

bool gfc_caf_is_dealloc_only (int);

tree gfc_nullify_alloc_comp (gfc_symbol *, tree, int, int cm = 0);

tree gfc_deallocate_alloc_comp (gfc_symbol *, tree, int, int cm = 0);
tree gfc_deallocate_alloc_comp_no_caf (gfc_symbol *, tree, int);
tree gfc_reassign_alloc_comp_caf (gfc_symbol *, tree, tree);

tree gfc_copy_alloc_comp (gfc_symbol *, tree, tree, int, int);

tree gfc_copy_only_alloc_comp (gfc_symbol *, tree, tree, int);

tree gfc_allocate_pdt_comp (gfc_symbol *, tree, int, gfc_actual_arglist *);
tree gfc_deallocate_pdt_comp (gfc_symbol *, tree, int);
tree gfc_check_pdt_dummy (gfc_symbol *, tree, int, gfc_actual_arglist *);

tree gfc_alloc_allocatable_for_assignment (gfc_loopinfo*, gfc_expr*, gfc_expr*);

/* Add initialization for deferred arrays.  */
void gfc_trans_deferred_array (gfc_symbol *, gfc_wrapped_block *);
/* Generate an initializer for a static pointer or allocatable array.  */
void gfc_trans_static_array_pointer (gfc_symbol *);

/* Get the procedure interface for a function call.  */
gfc_symbol *gfc_get_proc_ifc_for_expr (gfc_expr *);
/* Generate scalarization information for an expression.  */
gfc_ss *gfc_walk_expr (gfc_expr *);
/* Workhorse for gfc_walk_expr.  */
gfc_ss *gfc_walk_subexpr (gfc_ss *, gfc_expr *);
/* Workhorse for gfc_walk_variable_expr.  */
gfc_ss *gfc_walk_array_ref (gfc_ss *, gfc_expr *, gfc_ref * ref);
/* Walk the arguments of an elemental function.  */
gfc_ss *gfc_walk_elemental_function_args (gfc_ss *, gfc_actual_arglist *,
					  gfc_symbol *, gfc_ss_type);
/* Walk an intrinsic function.  */
gfc_ss *gfc_walk_intrinsic_function (gfc_ss *, gfc_expr *,
				     gfc_intrinsic_sym *);
/* Reverse the order of an SS chain.  */
gfc_ss *gfc_reverse_ss (gfc_ss *);

/* Free the SS associated with a loop.  */
void gfc_cleanup_loop (gfc_loopinfo *);
/* Associate a SS chain with a loop.  */
void gfc_add_ss_to_loop (gfc_loopinfo *, gfc_ss *);
/* Mark a SS chain as used in this loop.  */
void gfc_mark_ss_chain_used (gfc_ss *, unsigned);
/* Free a gfc_ss chain.  */
void gfc_free_ss_chain (gfc_ss *);
/* Free a single gfc_ss element.  */
void gfc_free_ss (gfc_ss *);
/* Allocate a new array type ss.  */
gfc_ss *gfc_get_array_ss (gfc_ss *, gfc_expr *, int, gfc_ss_type);
/* Allocate a new temporary type ss.  */
gfc_ss *gfc_get_temp_ss (tree, tree, int);
/* Allocate a new scalar type ss.  */
gfc_ss *gfc_get_scalar_ss (gfc_ss *, gfc_expr *);

bool gfc_scalar_elemental_arg_saved_as_reference (gfc_ss_info *);

/* Calculates the lower bound and stride of array sections.  */
void gfc_conv_ss_startstride (gfc_loopinfo *);

void gfc_init_loopinfo (gfc_loopinfo *);
void gfc_copy_loopinfo_to_se (gfc_se *, gfc_loopinfo *);

/* Marks the start of a scalarized expression, and declares loop variables.  */
void gfc_start_scalarized_body (gfc_loopinfo *, stmtblock_t *);
/* Generates one actual loop for a scalarized expression.  */
void  gfc_trans_scalarized_loop_end (gfc_loopinfo *, int, stmtblock_t *);
/* Generates the actual loops for a scalarized expression.  */
void gfc_trans_scalarizing_loops (gfc_loopinfo *, stmtblock_t *);
/* Mark the end of the main loop body and the start of the copying loop.  */
void gfc_trans_scalarized_loop_boundary (gfc_loopinfo *, stmtblock_t *);
/* Initialize the scalarization loop parameters.  */
void gfc_conv_loop_setup (gfc_loopinfo *, locus *);
/* Set each array's delta.  */
void gfc_set_delta (gfc_loopinfo *);
/* Resolve array assignment dependencies.  */
void gfc_conv_resolve_dependencies (gfc_loopinfo *, gfc_ss *, gfc_ss *);
/* Build a null array descriptor constructor.  */
tree gfc_build_null_descriptor (tree);

/* Get a single array element.  */
void gfc_conv_array_ref (gfc_se *, gfc_array_ref *, gfc_expr *, locus *);
/* Translate a reference to a temporary array.  */
void gfc_conv_tmp_array_ref (gfc_se * se);
/* Translate a reference to an array temporary.  */
void gfc_conv_tmp_ref (gfc_se *);

/* Evaluate an array expression.  */
void gfc_conv_expr_descriptor (gfc_se *, gfc_expr *);
/* Convert an array for passing as an actual function parameter.  */
void gfc_conv_array_parameter (gfc_se *, gfc_expr *, bool,
			       const gfc_symbol *, const char *, tree *);
/* Evaluate and transpose a matrix expression.  */
void gfc_conv_array_transpose (gfc_se *, gfc_expr *);

/* These work with both descriptors and descriptorless arrays.  */
tree gfc_conv_array_data (tree);
tree gfc_conv_array_offset (tree);
/* Return either an INT_CST or an expression for that part of the descriptor.  */
tree gfc_conv_array_stride (tree, int);
tree gfc_conv_array_lbound (tree, int);
tree gfc_conv_array_ubound (tree, int);

/* Set cobounds of an array.  */
void gfc_trans_array_cobounds (tree, stmtblock_t *, const gfc_symbol *);

/* Build expressions for accessing components of an array descriptor.  */
void gfc_get_descriptor_offsets_for_info (const_tree, tree *, tree *, tree *, tree *,
					  tree *, tree *, tree *);

tree gfc_conv_descriptor_data_get (tree);
tree gfc_conv_descriptor_data_addr (tree);
tree gfc_conv_descriptor_offset_get (tree);
tree gfc_conv_descriptor_span_get (tree);
tree gfc_conv_descriptor_dtype (tree);
tree gfc_conv_descriptor_rank (tree);
tree gfc_get_descriptor_dimension (tree);
tree gfc_conv_descriptor_stride_get (tree, tree);
tree gfc_conv_descriptor_lbound_get (tree, tree);
tree gfc_conv_descriptor_ubound_get (tree, tree);
tree gfc_conv_descriptor_token (tree);

void gfc_conv_descriptor_data_set (stmtblock_t *, tree, tree);
void gfc_conv_descriptor_offset_set (stmtblock_t *, tree, tree);
void gfc_conv_descriptor_span_set (stmtblock_t *, tree, tree);
void gfc_conv_descriptor_stride_set (stmtblock_t *, tree, tree, tree);
void gfc_conv_descriptor_lbound_set (stmtblock_t *, tree, tree, tree);
void gfc_conv_descriptor_ubound_set (stmtblock_t *, tree, tree, tree);

/* Shift lower bound of descriptor, updating ubound and offset.  */
void gfc_conv_shift_descriptor_lbound (stmtblock_t*, tree, int, tree);

/* Add pre-loop scalarization code for intrinsic functions which require
   special handling.  */
void gfc_add_intrinsic_ss_code (gfc_loopinfo *, gfc_ss *);

/* Functions for constant array constructor processing.  */
unsigned HOST_WIDE_INT gfc_constant_array_constructor_p (gfc_constructor_base);
tree gfc_build_constant_array_constructor (gfc_expr *, tree);

/* Copy a string from src to dest.  */
void gfc_trans_string_copy (stmtblock_t *, tree, tree, int, tree, tree, int);

/* Calculate extent / size of an array.  */
tree gfc_conv_array_extent_dim (tree, tree, tree*);
tree gfc_conv_descriptor_size (tree, int);
tree gfc_conv_descriptor_cosize (tree, int, int);