1 /* Header for code translation functions
2 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
4 Free Software Foundation, Inc.
5 Contributed by Paul Brook
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify it under
10 the terms of the GNU General Public License as published by the Free
11 Software Foundation; either version 3, or (at your option) any later
14 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
15 WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING3. If not see
21 <http://www.gnu.org/licenses/>. */
26 /* Mangled symbols take the form __module__name. */
27 #define GFC_MAX_MANGLED_SYMBOL_LEN (GFC_MAX_SYMBOL_LEN*2+4)
29 /* Struct for holding a block of statements. It should be treated as an
30 opaque entity and not modified directly. This allows us to change the
31 underlying representation of statement lists. */
35 unsigned int has_scope:1;
39 /* a simplified expression */
42 /* Code blocks to be executed before and after using the value. */
46 /* the result of the expression */
49 /* The length of a character string value. */
52 /* If set gfc_conv_variable will return an expression for the array
53 descriptor. When set, want_pointer should also be set.
54 If not set scalarizing variables will be substituted. */
55 unsigned descriptor_only:1;
57 /* When this is set gfc_conv_expr returns the address of a variable. Only
58 applies to EXPR_VARIABLE nodes.
59 Also used by gfc_conv_array_parameter. When set this indicates a pointer
60 to the descriptor should be returned, rather than the descriptor itself.
62 unsigned want_pointer:1;
64 /* An array function call returning without a temporary. Also used for array
65 pointer assignments. */
66 unsigned direct_byref:1;
68 /* If direct_byref is set, do work out the descriptor as in that case but
69 do still create a new descriptor variable instead of using an
70 existing one. This is useful for special pointer assignments like
71 rank remapping where we have to process the descriptor before
72 assigning to final one. */
73 unsigned byref_noassign:1;
75 /* Ignore absent optional arguments. Used for some intrinsics. */
76 unsigned ignore_optional:1;
78 /* When this is set the data and offset fields of the returned descriptor
79 are NULL. Used by intrinsic size. */
80 unsigned data_not_needed:1;
82 /* If set, gfc_conv_procedure_call does not put byref calls into se->pre. */
83 unsigned no_function_call:1;
85 /* If set, we will force the creation of a temporary. Useful to disable
86 non-copying procedure argument passing optimizations, when some function
90 unsigned want_coarray:1;
92 /* Scalarization parameters. */
93 struct gfc_se *parent;
95 struct gfc_loopinfo *loop;
100 /* Denotes different types of coarray.
101 Please keep in sync with libgfortran/caf/libcaf.h. */
104 GFC_CAF_COARRAY_STATIC,
105 GFC_CAF_COARRAY_ALLOC,
112 /* The array-specific scalarization informations. The array members of
113 this struct are indexed by actual array index, and thus can be sparse. */
115 typedef struct gfc_array_info
119 /* The ref that holds information on this section. */
121 /* The descriptor of this array. */
123 /* holds the pointer to the data array. */
125 /* To move some of the array index calculation out of the innermost loop. */
129 /* Holds the SS for a subscript. Indexed by actual dimension. */
130 struct gfc_ss *subscript[GFC_MAX_DIMENSIONS];
132 /* stride and delta are used to access this inside a scalarization loop.
133 start is used in the calculation of these. Indexed by scalarizer
135 tree start[GFC_MAX_DIMENSIONS];
136 tree end[GFC_MAX_DIMENSIONS];
137 tree stride[GFC_MAX_DIMENSIONS];
138 tree delta[GFC_MAX_DIMENSIONS];
144 /* A scalar value. This will be evaluated before entering the
145 scalarization loop. */
148 /* Like GFC_SS_SCALAR it evaluates the expression outside the
149 loop. Is always evaluated as a reference to the temporary, unless
150 temporary evaluation can result in a NULL pointer dereferencing (case of
151 optional arguments). Used for elemental function arguments. */
154 /* An array section. Scalarization indices will be substituted during
155 expression translation. */
158 /* A non-elemental function call returning an array. The call is executed
159 before entering the scalarization loop, storing the result in a
160 temporary. This temporary is then used inside the scalarization loop.
161 Simple assignments, e.g. a(:) = fn(), are handled without a temporary
162 as a special case. */
165 /* An array constructor. The current implementation is sub-optimal in
166 many cases. It allocated a temporary, assigns the values to it, then
167 uses this temporary inside the scalarization loop. */
170 /* A vector subscript. The vector's descriptor is cached in the
171 "descriptor" field of the associated gfc_ss_info. */
174 /* A temporary array allocated by the scalarizer. Its rank can be less
175 than that of the assignment expression. */
178 /* An intrinsic function call. Many intrinsic functions which map directly
179 to library calls are created as GFC_SS_FUNCTION nodes. */
182 /* A component of a derived type. */
188 typedef struct gfc_ss_info
197 /* If type is GFC_SS_SCALAR or GFC_SS_REFERENCE. */
201 /* Tells whether the reference can be null in the GFC_SS_REFERENCE case.
202 Used to handle elemental procedures' optional arguments. */
203 bool can_be_null_ref;
214 /* All other types. */
215 gfc_array_info array;
219 /* This is used by assignments requiring temporaries. The bits specify which
220 loops the terms appear in. This will be 1 for the RHS expressions,
221 2 for the LHS expressions, and 3(=1|2) for the temporary. */
224 /* Suppresses precalculation of scalars in WHERE assignments. */
229 #define gfc_get_ss_info() XCNEW (gfc_ss_info)
232 /* Scalarization State chain. Created by walking an expression tree before
233 creating the scalarization loops. Then passed as part of a gfc_se structure
234 to translate the expression inside the loop. Note that these chains are
235 terminated by gfc_ss_terminator, not NULL. A NULL pointer in a gfc_se
236 indicates to gfc_conv_* that this is a scalar expression.
237 SS structures can only belong to a single loopinfo. They must be added
238 otherwise they will not get freed. */
240 typedef struct gfc_ss
245 /* Translation from loop dimensions to actual array dimensions.
246 actual_dim = dim[loop_dim] */
247 int dim[GFC_MAX_DIMENSIONS];
249 /* All the SS in a loop and linked through loop_chain. The SS for an
250 expression are linked by the next pointer. */
251 struct gfc_ss *loop_chain;
254 /* Non-null if the ss is part of a nested loop. */
255 struct gfc_ss *parent;
257 /* If the evaluation of an expression requires a nested loop (for example
258 if the sum intrinsic is evaluated inline), this points to the nested
260 struct gfc_ss *nested_ss;
262 /* The loop this gfc_ss is in. */
263 struct gfc_loopinfo *loop;
265 unsigned is_alloc_lhs:1;
268 #define gfc_get_ss() XCNEW (gfc_ss)
270 /* The contents of this aren't actually used. A NULL SS chain indicates a
271 scalar expression, so this pointer is used to terminate SS chains. */
272 extern gfc_ss * const gfc_ss_terminator;
274 /* Holds information about an expression while it is being scalarized. */
275 typedef struct gfc_loopinfo
282 /* All the SS involved with this loop. */
284 /* The SS describing the temporary used in an assignment. */
287 /* Non-null if this loop is nested in another one. */
288 struct gfc_loopinfo *parent;
290 /* Chain of nested loops. */
291 struct gfc_loopinfo *nested, *next;
293 /* The scalarization loop index variables. */
294 tree loopvar[GFC_MAX_DIMENSIONS];
296 /* The bounds of the scalarization loops. */
297 tree from[GFC_MAX_DIMENSIONS];
298 tree to[GFC_MAX_DIMENSIONS];
299 gfc_ss *specloop[GFC_MAX_DIMENSIONS];
301 /* The code member contains the code for the body of the next outer loop. */
302 stmtblock_t code[GFC_MAX_DIMENSIONS];
304 /* Order in which the dimensions should be looped, innermost first. */
305 int order[GFC_MAX_DIMENSIONS];
307 /* Enum to control loop reversal. */
308 gfc_reverse reverse[GFC_MAX_DIMENSIONS];
310 /* The number of dimensions for which a temporary is used. */
313 /* If set we don't need the loop variables. */
314 unsigned array_parameter:1;
318 #define gfc_get_loopinfo() XCNEW (gfc_loopinfo)
320 /* Information about a symbol that has been shadowed by a temporary. */
323 symbol_attribute attr;
329 /* Store information about a block of code together with special
330 initialization and clean-up code. This can be used to incrementally add
331 init and cleanup, and in the end put everything together to a
332 try-finally expression. */
341 /* Class API functions. */
342 tree gfc_class_data_get (tree);
343 tree gfc_class_vptr_get (tree);
344 tree gfc_vtable_hash_get (tree);
345 tree gfc_vtable_size_get (tree);
346 tree gfc_vtable_extends_get (tree);
347 tree gfc_vtable_def_init_get (tree);
348 tree gfc_vtable_copy_get (tree);
349 tree gfc_get_class_array_ref (tree, tree);
350 tree gfc_copy_class_to_class (tree, tree, tree);
351 void gfc_conv_class_to_class (gfc_se *, gfc_expr *, gfc_typespec, bool);
353 /* Initialize an init/cleanup block. */
354 void gfc_start_wrapped_block (gfc_wrapped_block* block, tree code);
355 /* Add a pair of init/cleanup code to the block. Each one might be a
356 NULL_TREE if not required. */
357 void gfc_add_init_cleanup (gfc_wrapped_block* block, tree init, tree cleanup);
358 /* Finalize the block, that is, create a single expression encapsulating the
359 original code together with init and clean-up code. */
360 tree gfc_finish_wrapped_block (gfc_wrapped_block* block);
363 /* Advance the SS chain to the next term. */
364 void gfc_advance_se_ss_chain (gfc_se *);
366 /* Call this to initialize a gfc_se structure before use
367 first parameter is structure to initialize, second is
368 parent to get scalarization data from, or NULL. */
369 void gfc_init_se (gfc_se *, gfc_se *);
371 /* Create an artificial variable decl and add it to the current scope. */
372 tree gfc_create_var (tree, const char *);
373 /* Like above but doesn't add it to the current scope. */
374 tree gfc_create_var_np (tree, const char *);
376 /* Store the result of an expression in a temp variable so it can be used
377 repeatedly even if the original changes */
378 void gfc_make_safe_expr (gfc_se * se);
380 /* Makes sure se is suitable for passing as a function string parameter. */
381 void gfc_conv_string_parameter (gfc_se * se);
383 /* Compare two strings. */
384 tree gfc_build_compare_string (tree, tree, tree, tree, int, enum tree_code);
386 /* When using the gfc_conv_* make sure you understand what they do, i.e.
387 when a POST chain may be created, and what the returned expression may be
388 used for. Note that character strings have special handling. This
389 should not be a problem as most statements/operations only deal with
390 numeric/logical types. See the implementations in trans-expr.c
391 for details of the individual functions. */
393 void gfc_conv_expr (gfc_se * se, gfc_expr * expr);
394 void gfc_conv_expr_val (gfc_se * se, gfc_expr * expr);
395 void gfc_conv_expr_lhs (gfc_se * se, gfc_expr * expr);
396 void gfc_conv_expr_reference (gfc_se * se, gfc_expr *);
397 void gfc_conv_expr_type (gfc_se * se, gfc_expr *, tree);
400 void gfc_conv_scalar_char_value (gfc_symbol *sym, gfc_se *se, gfc_expr **expr);
401 tree gfc_string_to_single_character (tree len, tree str, int kind);
403 /* Find the decl containing the auxiliary variables for assigned variables. */
404 void gfc_conv_label_variable (gfc_se * se, gfc_expr * expr);
405 /* If the value is not constant, Create a temporary and copy the value. */
406 tree gfc_evaluate_now_loc (location_t, tree, stmtblock_t *);
407 tree gfc_evaluate_now (tree, stmtblock_t *);
409 /* Find the appropriate variant of a math intrinsic. */
410 tree gfc_builtin_decl_for_float_kind (enum built_in_function, int);
412 /* Intrinsic procedure handling. */
413 tree gfc_conv_intrinsic_subroutine (gfc_code *);
414 void gfc_conv_intrinsic_function (gfc_se *, gfc_expr *);
416 /* Does an intrinsic map directly to an external library call
417 This is true for array-returning intrinsics, unless
418 gfc_inline_intrinsic_function_p returns true. */
419 int gfc_is_intrinsic_libcall (gfc_expr *);
421 /* Used to call ordinary functions/subroutines
422 and procedure pointer components. */
423 int gfc_conv_procedure_call (gfc_se *, gfc_symbol *, gfc_actual_arglist *,
424 gfc_expr *, VEC(tree,gc) *);
426 void gfc_conv_subref_array_arg (gfc_se *, gfc_expr *, int, sym_intent, bool);
428 /* gfc_trans_* shouldn't call push/poplevel, use gfc_push/pop_scope */
430 /* Generate code for a scalar assignment. */
431 tree gfc_trans_scalar_assign (gfc_se *, gfc_se *, gfc_typespec, bool, bool,
434 /* Translate COMMON blocks. */
435 void gfc_trans_common (gfc_namespace *);
437 /* Translate a derived type constructor. */
438 void gfc_conv_structure (gfc_se *, gfc_expr *, int);
440 /* Return an expression which determines if a dummy parameter is present. */
441 tree gfc_conv_expr_present (gfc_symbol *);
442 /* Convert a missing, dummy argument into a null or zero. */
443 void gfc_conv_missing_dummy (gfc_se *, gfc_expr *, gfc_typespec, int);
445 /* Generate code to allocate a string temporary. */
446 tree gfc_conv_string_tmp (gfc_se *, tree, tree);
447 /* Get the string length variable belonging to an expression. */
448 tree gfc_get_expr_charlen (gfc_expr *);
449 /* Initialize a string length variable. */
450 void gfc_conv_string_length (gfc_charlen *, gfc_expr *, stmtblock_t *);
451 /* Ensure type sizes can be gimplified. */
452 void gfc_trans_vla_type_sizes (gfc_symbol *, stmtblock_t *);
454 /* Add an expression to the end of a block. */
455 void gfc_add_expr_to_block (stmtblock_t *, tree);
456 /* Add an expression to the beginning of a block. */
457 void gfc_prepend_expr_to_block (stmtblock_t *, tree);
458 /* Add a block to the end of a block. */
459 void gfc_add_block_to_block (stmtblock_t *, stmtblock_t *);
460 /* Add a MODIFY_EXPR to a block. */
461 void gfc_add_modify_loc (location_t, stmtblock_t *, tree, tree);
462 void gfc_add_modify (stmtblock_t *, tree, tree);
464 /* Initialize a statement block. */
465 void gfc_init_block (stmtblock_t *);
466 /* Start a new statement block. Like gfc_init_block but also starts a new
468 void gfc_start_block (stmtblock_t *);
469 /* Finish a statement block. Also closes the scope if the block was created
470 with gfc_start_block. */
471 tree gfc_finish_block (stmtblock_t *);
472 /* Merge the scope of a block with its parent. */
473 void gfc_merge_block_scope (stmtblock_t * block);
475 /* Return the backend label decl. */
476 tree gfc_get_label_decl (gfc_st_label *);
478 /* Return the decl for an external function. */
479 tree gfc_get_extern_function_decl (gfc_symbol *);
481 /* Return the decl for a function. */
482 tree gfc_get_function_decl (gfc_symbol *);
484 /* Build an ADDR_EXPR. */
485 tree gfc_build_addr_expr (tree, tree);
487 /* Build an ARRAY_REF. */
488 tree gfc_build_array_ref (tree, tree, tree);
490 /* Creates a label. Decl is artificial if label_id == NULL_TREE. */
491 tree gfc_build_label_decl (tree);
493 /* Return the decl used to hold the function return value.
494 Do not use if the function has an explicit result variable. */
495 tree gfc_get_fake_result_decl (gfc_symbol *, int);
497 /* Add a decl to the binding level for the current function. */
498 void gfc_add_decl_to_function (tree);
500 /* Make prototypes for runtime library functions. */
501 void gfc_build_builtin_function_decls (void);
503 /* Set the backend source location of a decl. */
504 void gfc_set_decl_location (tree, locus *);
506 /* Get a module symbol backend_decl if possible. */
507 bool gfc_get_module_backend_decl (gfc_symbol *);
509 /* Return the variable decl for a symbol. */
510 tree gfc_get_symbol_decl (gfc_symbol *);
512 /* Build a static initializer. */
513 tree gfc_conv_initializer (gfc_expr *, gfc_typespec *, tree, bool, bool, bool);
515 /* Assign a default initializer to a derived type. */
516 void gfc_init_default_dt (gfc_symbol *, stmtblock_t *, bool);
518 /* Substitute a temporary variable in place of the real one. */
519 void gfc_shadow_sym (gfc_symbol *, tree, gfc_saved_var *);
521 /* Restore the original variable. */
522 void gfc_restore_sym (gfc_symbol *, gfc_saved_var *);
524 /* Setting a decl assembler name, mangling it according to target rules
525 (like Windows @NN decorations). */
526 void gfc_set_decl_assembler_name (tree, tree);
528 /* Returns true if a variable of specified size should go on the stack. */
529 int gfc_can_put_var_on_stack (tree);
531 /* Allocate the lang-specific part of a decl node. */
532 void gfc_allocate_lang_decl (tree);
534 /* Advance along a TREE_CHAIN. */
535 tree gfc_advance_chain (tree, int);
537 /* Create a decl for a function. */
538 void gfc_create_function_decl (gfc_namespace *, bool);
539 /* Generate the code for a function. */
540 void gfc_generate_function_code (gfc_namespace *);
541 /* Output a BLOCK DATA program unit. */
542 void gfc_generate_block_data (gfc_namespace *);
543 /* Output a decl for a module variable. */
544 void gfc_generate_module_vars (gfc_namespace *);
545 /* Get the appropriate return statement for a procedure. */
546 tree gfc_generate_return (void);
548 struct GTY(()) module_htab_entry {
551 htab_t GTY ((param_is (union tree_node))) decls;
554 struct module_htab_entry *gfc_find_module (const char *);
555 void gfc_module_add_decl (struct module_htab_entry *, tree);
557 /* Get and set the current location. */
558 void gfc_save_backend_locus (locus *);
559 void gfc_set_backend_locus (locus *);
560 void gfc_restore_backend_locus (locus *);
562 /* Handle static constructor functions. */
563 extern GTY(()) tree gfc_static_ctors;
564 void gfc_generate_constructors (void);
566 /* Get the string length of an array constructor. */
567 bool get_array_ctor_strlen (stmtblock_t *, gfc_constructor_base, tree *);
569 /* Mark a condition as likely or unlikely. */
570 tree gfc_likely (tree);
571 tree gfc_unlikely (tree);
573 /* Generate a runtime error call. */
574 tree gfc_trans_runtime_error (bool, locus*, const char*, ...);
576 /* Generate a runtime warning/error check. */
577 void gfc_trans_runtime_check (bool, bool, tree, stmtblock_t *, locus *,
580 /* Generate a runtime check for same string length. */
581 void gfc_trans_same_strlen_check (const char*, locus*, tree, tree,
584 /* Generate a call to free() after checking that its arg is non-NULL. */
585 tree gfc_call_free (tree);
587 /* Allocate memory after performing a few checks. */
588 tree gfc_call_malloc (stmtblock_t *, tree, tree);
590 /* Build a memcpy call. */
591 tree gfc_build_memcpy_call (tree, tree, tree);
593 /* Allocate memory for allocatable variables, with optional status variable. */
594 void gfc_allocate_allocatable (stmtblock_t*, tree, tree, tree, tree,
595 tree, tree, tree, gfc_expr*);
597 /* Allocate memory, with optional status variable. */
598 void gfc_allocate_using_malloc (stmtblock_t *, tree, tree, tree);
600 /* Generate code to deallocate an array. */
601 tree gfc_deallocate_with_status (tree, tree, tree, tree, tree, bool,
603 tree gfc_deallocate_scalar_with_status (tree, tree, bool, gfc_expr*, gfc_typespec);
605 /* Generate code to call realloc(). */
606 tree gfc_call_realloc (stmtblock_t *, tree, tree);
608 /* Generate code for an assignment, includes scalarization. */
609 tree gfc_trans_assignment (gfc_expr *, gfc_expr *, bool, bool);
611 /* Generate code for a pointer assignment. */
612 tree gfc_trans_pointer_assignment (gfc_expr *, gfc_expr *);
614 /* Initialize function decls for library functions. */
615 void gfc_build_intrinsic_lib_fndecls (void);
616 /* Create function decls for IO library functions. */
617 void gfc_trans_io_runtime_check (tree, tree, int, const char *, stmtblock_t *);
618 void gfc_build_io_library_fndecls (void);
619 /* Build a function decl for a library function. */
620 tree gfc_build_library_function_decl (tree, tree, int, ...);
621 tree gfc_build_library_function_decl_with_spec (tree name, const char *spec,
622 tree rettype, int nargs, ...);
624 /* Process the local variable decls of a block construct. */
625 void gfc_process_block_locals (gfc_namespace*);
627 /* Output initialization/clean-up code that was deferred. */
628 void gfc_trans_deferred_vars (gfc_symbol*, gfc_wrapped_block *);
631 tree pushdecl (tree);
632 tree pushdecl_top_level (tree);
633 void pushlevel (int);
634 tree poplevel (int, int, int);
635 tree getdecls (void);
636 tree gfc_truthvalue_conversion (tree);
637 tree gfc_builtin_function (tree);
639 /* In trans-types.c. */
640 struct array_descr_info;
641 bool gfc_get_array_descr_info (const_tree, struct array_descr_info *);
643 /* In trans-openmp.c */
644 bool gfc_omp_privatize_by_reference (const_tree);
645 enum omp_clause_default_kind gfc_omp_predetermined_sharing (tree);
646 tree gfc_omp_report_decl (tree);
647 tree gfc_omp_clause_default_ctor (tree, tree, tree);
648 tree gfc_omp_clause_copy_ctor (tree, tree, tree);
649 tree gfc_omp_clause_assign_op (tree, tree, tree);
650 tree gfc_omp_clause_dtor (tree, tree);
651 bool gfc_omp_disregard_value_expr (tree, bool);
652 bool gfc_omp_private_debug_clause (tree, bool);
653 bool gfc_omp_private_outer_ref (tree);
654 struct gimplify_omp_ctx;
655 void gfc_omp_firstprivatize_type_sizes (struct gimplify_omp_ctx *, tree);
657 /* Runtime library function decls. */
658 extern GTY(()) tree gfor_fndecl_pause_numeric;
659 extern GTY(()) tree gfor_fndecl_pause_string;
660 extern GTY(()) tree gfor_fndecl_stop_numeric;
661 extern GTY(()) tree gfor_fndecl_stop_numeric_f08;
662 extern GTY(()) tree gfor_fndecl_stop_string;
663 extern GTY(()) tree gfor_fndecl_error_stop_numeric;
664 extern GTY(()) tree gfor_fndecl_error_stop_string;
665 extern GTY(()) tree gfor_fndecl_runtime_error;
666 extern GTY(()) tree gfor_fndecl_runtime_error_at;
667 extern GTY(()) tree gfor_fndecl_runtime_warning_at;
668 extern GTY(()) tree gfor_fndecl_os_error;
669 extern GTY(()) tree gfor_fndecl_generate_error;
670 extern GTY(()) tree gfor_fndecl_set_fpe;
671 extern GTY(()) tree gfor_fndecl_set_options;
672 extern GTY(()) tree gfor_fndecl_ttynam;
673 extern GTY(()) tree gfor_fndecl_ctime;
674 extern GTY(()) tree gfor_fndecl_fdate;
675 extern GTY(()) tree gfor_fndecl_in_pack;
676 extern GTY(()) tree gfor_fndecl_in_unpack;
677 extern GTY(()) tree gfor_fndecl_associated;
680 /* Coarray run-time library function decls. */
681 extern GTY(()) tree gfor_fndecl_caf_init;
682 extern GTY(()) tree gfor_fndecl_caf_finalize;
683 extern GTY(()) tree gfor_fndecl_caf_register;
684 extern GTY(()) tree gfor_fndecl_caf_deregister;
685 extern GTY(()) tree gfor_fndecl_caf_critical;
686 extern GTY(()) tree gfor_fndecl_caf_end_critical;
687 extern GTY(()) tree gfor_fndecl_caf_sync_all;
688 extern GTY(()) tree gfor_fndecl_caf_sync_images;
689 extern GTY(()) tree gfor_fndecl_caf_error_stop;
690 extern GTY(()) tree gfor_fndecl_caf_error_stop_str;
692 /* Coarray global variables for num_images/this_image. */
693 extern GTY(()) tree gfort_gvar_caf_num_images;
694 extern GTY(()) tree gfort_gvar_caf_this_image;
697 /* Math functions. Many other math functions are handled in
698 trans-intrinsic.c. */
700 typedef struct GTY(()) gfc_powdecl_list {
707 extern GTY(()) gfc_powdecl_list gfor_fndecl_math_powi[4][3];
708 extern GTY(()) tree gfor_fndecl_math_ishftc4;
709 extern GTY(()) tree gfor_fndecl_math_ishftc8;
710 extern GTY(()) tree gfor_fndecl_math_ishftc16;
712 /* BLAS functions. */
713 extern GTY(()) tree gfor_fndecl_sgemm;
714 extern GTY(()) tree gfor_fndecl_dgemm;
715 extern GTY(()) tree gfor_fndecl_cgemm;
716 extern GTY(()) tree gfor_fndecl_zgemm;
718 /* String functions. */
719 extern GTY(()) tree gfor_fndecl_compare_string;
720 extern GTY(()) tree gfor_fndecl_concat_string;
721 extern GTY(()) tree gfor_fndecl_string_len_trim;
722 extern GTY(()) tree gfor_fndecl_string_index;
723 extern GTY(()) tree gfor_fndecl_string_scan;
724 extern GTY(()) tree gfor_fndecl_string_verify;
725 extern GTY(()) tree gfor_fndecl_string_trim;
726 extern GTY(()) tree gfor_fndecl_string_minmax;
727 extern GTY(()) tree gfor_fndecl_adjustl;
728 extern GTY(()) tree gfor_fndecl_adjustr;
729 extern GTY(()) tree gfor_fndecl_select_string;
730 extern GTY(()) tree gfor_fndecl_compare_string_char4;
731 extern GTY(()) tree gfor_fndecl_concat_string_char4;
732 extern GTY(()) tree gfor_fndecl_string_len_trim_char4;
733 extern GTY(()) tree gfor_fndecl_string_index_char4;
734 extern GTY(()) tree gfor_fndecl_string_scan_char4;
735 extern GTY(()) tree gfor_fndecl_string_verify_char4;
736 extern GTY(()) tree gfor_fndecl_string_trim_char4;
737 extern GTY(()) tree gfor_fndecl_string_minmax_char4;
738 extern GTY(()) tree gfor_fndecl_adjustl_char4;
739 extern GTY(()) tree gfor_fndecl_adjustr_char4;
740 extern GTY(()) tree gfor_fndecl_select_string_char4;
742 /* Conversion between character kinds. */
743 extern GTY(()) tree gfor_fndecl_convert_char1_to_char4;
744 extern GTY(()) tree gfor_fndecl_convert_char4_to_char1;
746 /* Other misc. runtime library functions. */
747 extern GTY(()) tree gfor_fndecl_size0;
748 extern GTY(()) tree gfor_fndecl_size1;
749 extern GTY(()) tree gfor_fndecl_iargc;
751 /* Implemented in Fortran. */
752 extern GTY(()) tree gfor_fndecl_sc_kind;
753 extern GTY(()) tree gfor_fndecl_si_kind;
754 extern GTY(()) tree gfor_fndecl_sr_kind;
757 /* True if node is an integer constant. */
758 #define INTEGER_CST_P(node) (TREE_CODE(node) == INTEGER_CST)
760 /* gfortran-specific declaration information, the _CONT versions denote
761 arrays with CONTIGUOUS attribute. */
766 GFC_ARRAY_ASSUMED_SHAPE,
767 GFC_ARRAY_ASSUMED_SHAPE_CONT,
768 GFC_ARRAY_ALLOCATABLE,
770 GFC_ARRAY_POINTER_CONT
773 /* Array types only. */
774 /* FIXME: the variable_size annotation here is needed because these types are
775 variable-sized in some other frontends. Due to gengtype deficiency the GTY
776 options of such types have to agree across all frontends. */
777 struct GTY((variable_size)) lang_type {
779 enum gfc_array_kind akind;
780 tree lbound[GFC_MAX_DIMENSIONS];
781 tree ubound[GFC_MAX_DIMENSIONS];
782 tree stride[GFC_MAX_DIMENSIONS];
789 tree nonrestricted_type;
794 struct GTY((variable_size)) lang_decl {
795 /* Dummy variables. */
796 tree saved_descriptor;
797 /* Assigned integer nodes. Stringlength is the IO format string's length.
798 Addr is the address of the string or the target label. Stringlength is
799 initialized to -2 and assigned to -1 when addr is assigned to the
800 address of target label. */
804 /* For assumed-shape coarrays. */
805 tree token, caf_offset;
809 #define GFC_DECL_ASSIGN_ADDR(node) DECL_LANG_SPECIFIC(node)->addr
810 #define GFC_DECL_STRING_LEN(node) DECL_LANG_SPECIFIC(node)->stringlen
811 #define GFC_DECL_SPAN(node) DECL_LANG_SPECIFIC(node)->span
812 #define GFC_DECL_TOKEN(node) DECL_LANG_SPECIFIC(node)->token
813 #define GFC_DECL_CAF_OFFSET(node) DECL_LANG_SPECIFIC(node)->caf_offset
814 #define GFC_DECL_SAVED_DESCRIPTOR(node) \
815 (DECL_LANG_SPECIFIC(node)->saved_descriptor)
816 #define GFC_DECL_PACKED_ARRAY(node) DECL_LANG_FLAG_0(node)
817 #define GFC_DECL_PARTIAL_PACKED_ARRAY(node) DECL_LANG_FLAG_1(node)
818 #define GFC_DECL_ASSIGN(node) DECL_LANG_FLAG_2(node)
819 #define GFC_DECL_COMMON_OR_EQUIV(node) DECL_LANG_FLAG_3(node)
820 #define GFC_DECL_CRAY_POINTEE(node) DECL_LANG_FLAG_4(node)
821 #define GFC_DECL_RESULT(node) DECL_LANG_FLAG_5(node)
822 #define GFC_DECL_SUBREF_ARRAY_P(node) DECL_LANG_FLAG_6(node)
823 #define GFC_DECL_PUSH_TOPLEVEL(node) DECL_LANG_FLAG_7(node)
824 #define GFC_DECL_CLASS(node) DECL_LANG_FLAG_8(node)
826 /* An array descriptor. */
827 #define GFC_DESCRIPTOR_TYPE_P(node) TYPE_LANG_FLAG_1(node)
828 /* An array without a descriptor. */
829 #define GFC_ARRAY_TYPE_P(node) TYPE_LANG_FLAG_2(node)
830 /* Fortran POINTER type. */
831 #define GFC_POINTER_TYPE_P(node) TYPE_LANG_FLAG_3(node)
832 /* The GFC_TYPE_ARRAY_* members are present in both descriptor and
833 descriptorless array types. */
834 #define GFC_TYPE_ARRAY_LBOUND(node, dim) \
835 (TYPE_LANG_SPECIFIC(node)->lbound[dim])
836 #define GFC_TYPE_ARRAY_UBOUND(node, dim) \
837 (TYPE_LANG_SPECIFIC(node)->ubound[dim])
838 #define GFC_TYPE_ARRAY_STRIDE(node, dim) \
839 (TYPE_LANG_SPECIFIC(node)->stride[dim])
840 #define GFC_TYPE_ARRAY_RANK(node) (TYPE_LANG_SPECIFIC(node)->rank)
841 #define GFC_TYPE_ARRAY_CORANK(node) (TYPE_LANG_SPECIFIC(node)->corank)
842 #define GFC_TYPE_ARRAY_CAF_TOKEN(node) (TYPE_LANG_SPECIFIC(node)->caf_token)
843 #define GFC_TYPE_ARRAY_CAF_OFFSET(node) (TYPE_LANG_SPECIFIC(node)->caf_offset)
844 #define GFC_TYPE_ARRAY_SIZE(node) (TYPE_LANG_SPECIFIC(node)->size)
845 #define GFC_TYPE_ARRAY_OFFSET(node) (TYPE_LANG_SPECIFIC(node)->offset)
846 #define GFC_TYPE_ARRAY_AKIND(node) (TYPE_LANG_SPECIFIC(node)->akind)
847 /* Code should use gfc_get_dtype instead of accessing this directly. It may
848 not be known when the type is created. */
849 #define GFC_TYPE_ARRAY_DTYPE(node) (TYPE_LANG_SPECIFIC(node)->dtype)
850 #define GFC_TYPE_ARRAY_DATAPTR_TYPE(node) \
851 (TYPE_LANG_SPECIFIC(node)->dataptr_type)
852 #define GFC_TYPE_ARRAY_SPAN(node) (TYPE_LANG_SPECIFIC(node)->span)
853 #define GFC_TYPE_ARRAY_BASE_DECL(node, internal) \
854 (TYPE_LANG_SPECIFIC(node)->base_decl[(internal)])
857 /* Build an expression with void type. */
858 #define build1_v(code, arg) \
859 fold_build1_loc (input_location, code, void_type_node, arg)
860 #define build2_v(code, arg1, arg2) \
861 fold_build2_loc (input_location, code, void_type_node, arg1, arg2)
862 #define build3_v(code, arg1, arg2, arg3) \
863 fold_build3_loc (input_location, code, void_type_node, arg1, arg2, arg3)
864 #define build4_v(code, arg1, arg2, arg3, arg4) \
865 build4_loc (input_location, code, void_type_node, arg1, arg2, \
868 /* This group of functions allows a caller to evaluate an expression from
869 the callee's interface. It establishes a mapping between the interface's
870 dummy arguments and the caller's actual arguments, then applies that
871 mapping to a given gfc_expr.
873 You can initialize a mapping structure like so:
875 gfc_interface_mapping mapping;
877 gfc_init_interface_mapping (&mapping);
879 You should then evaluate each actual argument into a temporary
880 gfc_se structure, here called "se", and map the result to the
881 dummy argument's symbol, here called "sym":
883 gfc_add_interface_mapping (&mapping, sym, &se);
885 After adding all mappings, you should call:
887 gfc_finish_interface_mapping (&mapping, pre, post);
889 where "pre" and "post" are statement blocks for initialization
890 and finalization code respectively. You can then evaluate an
891 interface expression "expr" as follows:
893 gfc_apply_interface_mapping (&mapping, se, expr);
895 Once you've evaluated all expressions, you should free
896 the mapping structure with:
898 gfc_free_interface_mapping (&mapping); */
901 /* This structure represents a mapping from OLD to NEW, where OLD is a
902 dummy argument symbol and NEW is a symbol that represents the value
903 of an actual argument. Mappings are linked together using NEXT
904 (in no particular order). */
905 typedef struct gfc_interface_sym_mapping
907 struct gfc_interface_sym_mapping *next;
909 gfc_symtree *new_sym;
912 gfc_interface_sym_mapping;
915 /* This structure is used by callers to evaluate an expression from
916 a callee's interface. */
917 typedef struct gfc_interface_mapping
919 /* Maps the interface's dummy arguments to the values that the caller
920 is passing. The whole list is owned by this gfc_interface_mapping. */
921 gfc_interface_sym_mapping *syms;
923 /* A list of gfc_charlens that were needed when creating copies of
924 expressions. The whole list is owned by this gfc_interface_mapping. */
925 gfc_charlen *charlens;
927 gfc_interface_mapping;
929 void gfc_init_interface_mapping (gfc_interface_mapping *);
930 void gfc_free_interface_mapping (gfc_interface_mapping *);
931 void gfc_add_interface_mapping (gfc_interface_mapping *,
932 gfc_symbol *, gfc_se *, gfc_expr *);
933 void gfc_finish_interface_mapping (gfc_interface_mapping *,
934 stmtblock_t *, stmtblock_t *);
935 void gfc_apply_interface_mapping (gfc_interface_mapping *,
936 gfc_se *, gfc_expr *);
939 /* Standard error messages used in all the trans-*.c files. */
940 extern const char gfc_msg_fault[];
941 extern const char gfc_msg_wrong_return[];
943 #define OMPWS_WORKSHARE_FLAG 1 /* Set if in a workshare construct. */
944 #define OMPWS_CURR_SINGLEUNIT 2 /* Set if current gfc_code in workshare
945 construct is not workshared. */
946 #define OMPWS_SCALARIZER_WS 4 /* Set if scalarizer should attempt
947 to create parallel loops. */
948 #define OMPWS_NOWAIT 8 /* Use NOWAIT on OMP_FOR. */
949 extern int ompws_flags;
951 #endif /* GFC_TRANS_H */