1 /* Header for code translation functions
2 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
3 Free Software Foundation, Inc.
4 Contributed by Paul Brook
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
25 /* Mangled symbols take the form __module__name. */
26 #define GFC_MAX_MANGLED_SYMBOL_LEN (GFC_MAX_SYMBOL_LEN*2+4)
28 /* Struct for holding a block of statements. It should be treated as an
29 opaque entity and not modified directly. This allows us to change the
30 underlying representation of statement lists. */
34 unsigned int has_scope:1;
38 /* a simplified expression */
41 /* Code blocks to be executed before and after using the value. */
45 /* the result of the expression */
48 /* The length of a character string value. */
51 /* If set gfc_conv_variable will return an expression for the array
52 descriptor. When set, want_pointer should also be set.
53 If not set scalarizing variables will be substituted. */
54 unsigned descriptor_only:1;
56 /* When this is set gfc_conv_expr returns the address of a variable. Only
57 applies to EXPR_VARIABLE nodes.
58 Also used by gfc_conv_array_parameter. When set this indicates a pointer
59 to the descriptor should be returned, rather than the descriptor itself.
61 unsigned want_pointer:1;
63 /* An array function call returning without a temporary. Also used for array
64 pointer assignments. */
65 unsigned direct_byref:1;
67 /* If direct_byref is set, do work out the descriptor as in that case but
68 do still create a new descriptor variable instead of using an
69 existing one. This is useful for special pointer assignments like
70 rank remapping where we have to process the descriptor before
71 assigning to final one. */
72 unsigned byref_noassign:1;
74 /* Ignore absent optional arguments. Used for some intrinsics. */
75 unsigned ignore_optional:1;
77 /* When this is set the data and offset fields of the returned descriptor
78 are NULL. Used by intrinsic size. */
79 unsigned data_not_needed:1;
81 /* If set, gfc_conv_procedure_call does not put byref calls into se->pre. */
82 unsigned no_function_call:1;
84 /* If set, we will force the creation of a temporary. Useful to disable
85 non-copying procedure argument passing optimizations, when some function
89 unsigned want_coarray:1;
91 /* Scalarization parameters. */
92 struct gfc_se *parent;
94 struct gfc_loopinfo *loop;
99 /* Denotes different types of coarray.
100 Please keep in sync with libgfortran/caf/libcaf.h. */
103 GFC_CAF_COARRAY_STATIC,
104 GFC_CAF_COARRAY_ALLOC,
111 /* The array-specific scalarization informations. The array members of
112 this struct are indexed by actual array index, and thus can be sparse. */
114 typedef struct gfc_array_info
118 /* The ref that holds information on this section. */
120 /* The descriptor of this array. */
122 /* holds the pointer to the data array. */
124 /* To move some of the array index calculation out of the innermost loop. */
128 /* Holds the SS for a subscript. Indexed by actual dimension. */
129 struct gfc_ss *subscript[GFC_MAX_DIMENSIONS];
131 /* stride and delta are used to access this inside a scalarization loop.
132 start is used in the calculation of these. Indexed by scalarizer
134 tree start[GFC_MAX_DIMENSIONS];
135 tree end[GFC_MAX_DIMENSIONS];
136 tree stride[GFC_MAX_DIMENSIONS];
137 tree delta[GFC_MAX_DIMENSIONS];
143 /* A scalar value. This will be evaluated before entering the
144 scalarization loop. */
147 /* Like GFC_SS_SCALAR it evaluates the expression outside the
148 loop. Is always evaluated as a reference to the temporary.
149 Used for elemental function arguments. */
152 /* An array section. Scalarization indices will be substituted during
153 expression translation. */
156 /* A non-elemental function call returning an array. The call is executed
157 before entering the scalarization loop, storing the result in a
158 temporary. This temporary is then used inside the scalarization loop.
159 Simple assignments, e.g. a(:) = fn(), are handled without a temporary
160 as a special case. */
163 /* An array constructor. The current implementation is sub-optimal in
164 many cases. It allocated a temporary, assigns the values to it, then
165 uses this temporary inside the scalarization loop. */
168 /* A vector subscript. The vector's descriptor is cached in the
169 "descriptor" field of the associated gfc_ss_info. */
172 /* A temporary array allocated by the scalarizer. Its rank can be less
173 than that of the assignment expression. */
176 /* An intrinsic function call. Many intrinsic functions which map directly
177 to library calls are created as GFC_SS_FUNCTION nodes. */
180 /* A component of a derived type. */
186 typedef struct gfc_ss_info
194 /* If type is GFC_SS_SCALAR or GFC_SS_REFERENCE. */
208 /* All other types. */
209 gfc_array_info array;
215 #define gfc_get_ss_info() XCNEW (gfc_ss_info)
218 /* Scalarization State chain. Created by walking an expression tree before
219 creating the scalarization loops. Then passed as part of a gfc_se structure
220 to translate the expression inside the loop. Note that these chains are
221 terminated by gfc_ss_terminator, not NULL. A NULL pointer in a gfc_se
222 indicates to gfc_conv_* that this is a scalar expression.
223 SS structures can only belong to a single loopinfo. They must be added
224 otherwise they will not get freed. */
226 typedef struct gfc_ss
231 /* Translation from loop dimensions to actual array dimensions.
232 actual_dim = dim[loop_dim] */
233 int dim[GFC_MAX_DIMENSIONS];
235 /* All the SS in a loop and linked through loop_chain. The SS for an
236 expression are linked by the next pointer. */
237 struct gfc_ss *loop_chain;
240 /* This is used by assignments requiring temporaries. The bits specify which
241 loops the terms appear in. This will be 1 for the RHS expressions,
242 2 for the LHS expressions, and 3(=1|2) for the temporary. The bit
243 'where' suppresses precalculation of scalars in WHERE assignments. */
244 unsigned useflags:2, where:1, is_alloc_lhs:1;
247 #define gfc_get_ss() XCNEW (gfc_ss)
249 /* The contents of this aren't actually used. A NULL SS chain indicates a
250 scalar expression, so this pointer is used to terminate SS chains. */
251 extern gfc_ss * const gfc_ss_terminator;
253 /* Holds information about an expression while it is being scalarized. */
254 typedef struct gfc_loopinfo
261 /* All the SS involved with this loop. */
263 /* The SS describing the temporary used in an assignment. */
266 /* The scalarization loop index variables. */
267 tree loopvar[GFC_MAX_DIMENSIONS];
269 /* The bounds of the scalarization loops. */
270 tree from[GFC_MAX_DIMENSIONS];
271 tree to[GFC_MAX_DIMENSIONS];
272 gfc_ss *specloop[GFC_MAX_DIMENSIONS];
274 /* The code member contains the code for the body of the next outer loop. */
275 stmtblock_t code[GFC_MAX_DIMENSIONS];
277 /* Order in which the dimensions should be looped, innermost first. */
278 int order[GFC_MAX_DIMENSIONS];
280 /* Enum to control loop reversal. */
281 gfc_reverse reverse[GFC_MAX_DIMENSIONS];
283 /* The number of dimensions for which a temporary is used. */
286 /* If set we don't need the loop variables. */
287 unsigned array_parameter:1;
292 /* Information about a symbol that has been shadowed by a temporary. */
295 symbol_attribute attr;
301 /* Store information about a block of code together with special
302 initialization and clean-up code. This can be used to incrementally add
303 init and cleanup, and in the end put everything together to a
304 try-finally expression. */
314 /* Initialize an init/cleanup block. */
315 void gfc_start_wrapped_block (gfc_wrapped_block* block, tree code);
316 /* Add a pair of init/cleanup code to the block. Each one might be a
317 NULL_TREE if not required. */
318 void gfc_add_init_cleanup (gfc_wrapped_block* block, tree init, tree cleanup);
319 /* Finalize the block, that is, create a single expression encapsulating the
320 original code together with init and clean-up code. */
321 tree gfc_finish_wrapped_block (gfc_wrapped_block* block);
324 /* Advance the SS chain to the next term. */
325 void gfc_advance_se_ss_chain (gfc_se *);
327 /* Call this to initialize a gfc_se structure before use
328 first parameter is structure to initialize, second is
329 parent to get scalarization data from, or NULL. */
330 void gfc_init_se (gfc_se *, gfc_se *);
332 /* Create an artificial variable decl and add it to the current scope. */
333 tree gfc_create_var (tree, const char *);
334 /* Like above but doesn't add it to the current scope. */
335 tree gfc_create_var_np (tree, const char *);
337 /* Store the result of an expression in a temp variable so it can be used
338 repeatedly even if the original changes */
339 void gfc_make_safe_expr (gfc_se * se);
341 /* Makes sure se is suitable for passing as a function string parameter. */
342 void gfc_conv_string_parameter (gfc_se * se);
344 /* Compare two strings. */
345 tree gfc_build_compare_string (tree, tree, tree, tree, int, enum tree_code);
347 /* When using the gfc_conv_* make sure you understand what they do, i.e.
348 when a POST chain may be created, and what the returned expression may be
349 used for. Note that character strings have special handling. This
350 should not be a problem as most statements/operations only deal with
351 numeric/logical types. See the implementations in trans-expr.c
352 for details of the individual functions. */
354 void gfc_conv_expr (gfc_se * se, gfc_expr * expr);
355 void gfc_conv_expr_val (gfc_se * se, gfc_expr * expr);
356 void gfc_conv_expr_lhs (gfc_se * se, gfc_expr * expr);
357 void gfc_conv_expr_reference (gfc_se * se, gfc_expr *);
358 void gfc_conv_expr_type (gfc_se * se, gfc_expr *, tree);
361 void gfc_conv_scalar_char_value (gfc_symbol *sym, gfc_se *se, gfc_expr **expr);
362 tree gfc_string_to_single_character (tree len, tree str, int kind);
364 /* Find the decl containing the auxiliary variables for assigned variables. */
365 void gfc_conv_label_variable (gfc_se * se, gfc_expr * expr);
366 /* If the value is not constant, Create a temporary and copy the value. */
367 tree gfc_evaluate_now_loc (location_t, tree, stmtblock_t *);
368 tree gfc_evaluate_now (tree, stmtblock_t *);
370 /* Find the appropriate variant of a math intrinsic. */
371 tree gfc_builtin_decl_for_float_kind (enum built_in_function, int);
373 /* Intrinsic procedure handling. */
374 tree gfc_conv_intrinsic_subroutine (gfc_code *);
375 void gfc_conv_intrinsic_function (gfc_se *, gfc_expr *);
377 /* Is the intrinsic expanded inline. */
378 bool gfc_inline_intrinsic_function_p (gfc_expr *);
380 /* Does an intrinsic map directly to an external library call
381 This is true for array-returning intrinsics, unless
382 gfc_inline_intrinsic_function_p returns true. */
383 int gfc_is_intrinsic_libcall (gfc_expr *);
385 /* Used to call ordinary functions/subroutines
386 and procedure pointer components. */
387 int gfc_conv_procedure_call (gfc_se *, gfc_symbol *, gfc_actual_arglist *,
388 gfc_expr *, VEC(tree,gc) *);
390 void gfc_conv_subref_array_arg (gfc_se *, gfc_expr *, int, sym_intent, bool);
392 /* gfc_trans_* shouldn't call push/poplevel, use gfc_push/pop_scope */
394 /* Generate code for a scalar assignment. */
395 tree gfc_trans_scalar_assign (gfc_se *, gfc_se *, gfc_typespec, bool, bool,
398 /* Translate COMMON blocks. */
399 void gfc_trans_common (gfc_namespace *);
401 /* Translate a derived type constructor. */
402 void gfc_conv_structure (gfc_se *, gfc_expr *, int);
404 /* Return an expression which determines if a dummy parameter is present. */
405 tree gfc_conv_expr_present (gfc_symbol *);
406 /* Convert a missing, dummy argument into a null or zero. */
407 void gfc_conv_missing_dummy (gfc_se *, gfc_expr *, gfc_typespec, int);
409 /* Generate code to allocate a string temporary. */
410 tree gfc_conv_string_tmp (gfc_se *, tree, tree);
411 /* Get the string length variable belonging to an expression. */
412 tree gfc_get_expr_charlen (gfc_expr *);
413 /* Initialize a string length variable. */
414 void gfc_conv_string_length (gfc_charlen *, gfc_expr *, stmtblock_t *);
415 /* Ensure type sizes can be gimplified. */
416 void gfc_trans_vla_type_sizes (gfc_symbol *, stmtblock_t *);
418 /* Add an expression to the end of a block. */
419 void gfc_add_expr_to_block (stmtblock_t *, tree);
420 /* Add an expression to the beginning of a block. */
421 void gfc_prepend_expr_to_block (stmtblock_t *, tree);
422 /* Add a block to the end of a block. */
423 void gfc_add_block_to_block (stmtblock_t *, stmtblock_t *);
424 /* Add a MODIFY_EXPR to a block. */
425 void gfc_add_modify_loc (location_t, stmtblock_t *, tree, tree);
426 void gfc_add_modify (stmtblock_t *, tree, tree);
428 /* Initialize a statement block. */
429 void gfc_init_block (stmtblock_t *);
430 /* Start a new statement block. Like gfc_init_block but also starts a new
432 void gfc_start_block (stmtblock_t *);
433 /* Finish a statement block. Also closes the scope if the block was created
434 with gfc_start_block. */
435 tree gfc_finish_block (stmtblock_t *);
436 /* Merge the scope of a block with its parent. */
437 void gfc_merge_block_scope (stmtblock_t * block);
439 /* Return the backend label decl. */
440 tree gfc_get_label_decl (gfc_st_label *);
442 /* Return the decl for an external function. */
443 tree gfc_get_extern_function_decl (gfc_symbol *);
445 /* Return the decl for a function. */
446 tree gfc_get_function_decl (gfc_symbol *);
448 /* Build an ADDR_EXPR. */
449 tree gfc_build_addr_expr (tree, tree);
451 /* Build an ARRAY_REF. */
452 tree gfc_build_array_ref (tree, tree, tree);
454 /* Creates a label. Decl is artificial if label_id == NULL_TREE. */
455 tree gfc_build_label_decl (tree);
457 /* Return the decl used to hold the function return value.
458 Do not use if the function has an explicit result variable. */
459 tree gfc_get_fake_result_decl (gfc_symbol *, int);
461 /* Add a decl to the binding level for the current function. */
462 void gfc_add_decl_to_function (tree);
464 /* Make prototypes for runtime library functions. */
465 void gfc_build_builtin_function_decls (void);
467 /* Set the backend source location of a decl. */
468 void gfc_set_decl_location (tree, locus *);
470 /* Get a module symbol backend_decl if possible. */
471 bool gfc_get_module_backend_decl (gfc_symbol *);
473 /* Return the variable decl for a symbol. */
474 tree gfc_get_symbol_decl (gfc_symbol *);
476 /* Build a static initializer. */
477 tree gfc_conv_initializer (gfc_expr *, gfc_typespec *, tree, bool, bool, bool);
479 /* Assign a default initializer to a derived type. */
480 void gfc_init_default_dt (gfc_symbol *, stmtblock_t *, bool);
482 /* Substitute a temporary variable in place of the real one. */
483 void gfc_shadow_sym (gfc_symbol *, tree, gfc_saved_var *);
485 /* Restore the original variable. */
486 void gfc_restore_sym (gfc_symbol *, gfc_saved_var *);
488 /* Setting a decl assembler name, mangling it according to target rules
489 (like Windows @NN decorations). */
490 void gfc_set_decl_assembler_name (tree, tree);
492 /* Returns true if a variable of specified size should go on the stack. */
493 int gfc_can_put_var_on_stack (tree);
495 /* Allocate the lang-specific part of a decl node. */
496 void gfc_allocate_lang_decl (tree);
498 /* Advance along a TREE_CHAIN. */
499 tree gfc_advance_chain (tree, int);
501 /* Create a decl for a function. */
502 void gfc_create_function_decl (gfc_namespace *, bool);
503 /* Generate the code for a function. */
504 void gfc_generate_function_code (gfc_namespace *);
505 /* Output a BLOCK DATA program unit. */
506 void gfc_generate_block_data (gfc_namespace *);
507 /* Output a decl for a module variable. */
508 void gfc_generate_module_vars (gfc_namespace *);
509 /* Get the appropriate return statement for a procedure. */
510 tree gfc_generate_return (void);
512 struct GTY(()) module_htab_entry {
515 htab_t GTY ((param_is (union tree_node))) decls;
518 struct module_htab_entry *gfc_find_module (const char *);
519 void gfc_module_add_decl (struct module_htab_entry *, tree);
521 /* Get and set the current location. */
522 void gfc_save_backend_locus (locus *);
523 void gfc_set_backend_locus (locus *);
524 void gfc_restore_backend_locus (locus *);
526 /* Handle static constructor functions. */
527 extern GTY(()) tree gfc_static_ctors;
528 void gfc_generate_constructors (void);
530 /* Get the string length of an array constructor. */
531 bool get_array_ctor_strlen (stmtblock_t *, gfc_constructor_base, tree *);
533 /* Mark a condition as likely or unlikely. */
534 tree gfc_likely (tree);
535 tree gfc_unlikely (tree);
537 /* Generate a runtime error call. */
538 tree gfc_trans_runtime_error (bool, locus*, const char*, ...);
540 /* Generate a runtime warning/error check. */
541 void gfc_trans_runtime_check (bool, bool, tree, stmtblock_t *, locus *,
544 /* Generate a runtime check for same string length. */
545 void gfc_trans_same_strlen_check (const char*, locus*, tree, tree,
548 /* Generate a call to free() after checking that its arg is non-NULL. */
549 tree gfc_call_free (tree);
551 /* Allocate memory after performing a few checks. */
552 tree gfc_call_malloc (stmtblock_t *, tree, tree);
554 /* Build a memcpy call. */
555 tree gfc_build_memcpy_call (tree, tree, tree);
557 /* Allocate memory for allocatable variables, with optional status variable. */
558 void gfc_allocate_allocatable (stmtblock_t*, tree, tree, tree,
559 tree, tree, tree, gfc_expr*);
561 /* Allocate memory, with optional status variable. */
562 void gfc_allocate_using_malloc (stmtblock_t *, tree, tree, tree);
564 /* Generate code to deallocate an array. */
565 tree gfc_deallocate_with_status (tree, tree, bool, gfc_expr*);
566 tree gfc_deallocate_scalar_with_status (tree, tree, bool, gfc_expr*, gfc_typespec);
568 /* Generate code to call realloc(). */
569 tree gfc_call_realloc (stmtblock_t *, tree, tree);
571 /* Generate code for an assignment, includes scalarization. */
572 tree gfc_trans_assignment (gfc_expr *, gfc_expr *, bool, bool);
574 /* Generate code for a pointer assignment. */
575 tree gfc_trans_pointer_assignment (gfc_expr *, gfc_expr *);
577 /* Initialize function decls for library functions. */
578 void gfc_build_intrinsic_lib_fndecls (void);
579 /* Create function decls for IO library functions. */
580 void gfc_trans_io_runtime_check (tree, tree, int, const char *, stmtblock_t *);
581 void gfc_build_io_library_fndecls (void);
582 /* Build a function decl for a library function. */
583 tree gfc_build_library_function_decl (tree, tree, int, ...);
584 tree gfc_build_library_function_decl_with_spec (tree name, const char *spec,
585 tree rettype, int nargs, ...);
587 /* Process the local variable decls of a block construct. */
588 void gfc_process_block_locals (gfc_namespace*);
590 /* Output initialization/clean-up code that was deferred. */
591 void gfc_trans_deferred_vars (gfc_symbol*, gfc_wrapped_block *);
594 tree pushdecl (tree);
595 tree pushdecl_top_level (tree);
596 void pushlevel (int);
597 tree poplevel (int, int, int);
598 tree getdecls (void);
599 tree gfc_truthvalue_conversion (tree);
600 tree gfc_builtin_function (tree);
602 /* In trans-types.c. */
603 struct array_descr_info;
604 bool gfc_get_array_descr_info (const_tree, struct array_descr_info *);
606 /* In trans-openmp.c */
607 bool gfc_omp_privatize_by_reference (const_tree);
608 enum omp_clause_default_kind gfc_omp_predetermined_sharing (tree);
609 tree gfc_omp_report_decl (tree);
610 tree gfc_omp_clause_default_ctor (tree, tree, tree);
611 tree gfc_omp_clause_copy_ctor (tree, tree, tree);
612 tree gfc_omp_clause_assign_op (tree, tree, tree);
613 tree gfc_omp_clause_dtor (tree, tree);
614 bool gfc_omp_disregard_value_expr (tree, bool);
615 bool gfc_omp_private_debug_clause (tree, bool);
616 bool gfc_omp_private_outer_ref (tree);
617 struct gimplify_omp_ctx;
618 void gfc_omp_firstprivatize_type_sizes (struct gimplify_omp_ctx *, tree);
620 /* Runtime library function decls. */
621 extern GTY(()) tree gfor_fndecl_pause_numeric;
622 extern GTY(()) tree gfor_fndecl_pause_string;
623 extern GTY(()) tree gfor_fndecl_stop_numeric;
624 extern GTY(()) tree gfor_fndecl_stop_numeric_f08;
625 extern GTY(()) tree gfor_fndecl_stop_string;
626 extern GTY(()) tree gfor_fndecl_error_stop_numeric;
627 extern GTY(()) tree gfor_fndecl_error_stop_string;
628 extern GTY(()) tree gfor_fndecl_runtime_error;
629 extern GTY(()) tree gfor_fndecl_runtime_error_at;
630 extern GTY(()) tree gfor_fndecl_runtime_warning_at;
631 extern GTY(()) tree gfor_fndecl_os_error;
632 extern GTY(()) tree gfor_fndecl_generate_error;
633 extern GTY(()) tree gfor_fndecl_set_fpe;
634 extern GTY(()) tree gfor_fndecl_set_options;
635 extern GTY(()) tree gfor_fndecl_ttynam;
636 extern GTY(()) tree gfor_fndecl_ctime;
637 extern GTY(()) tree gfor_fndecl_fdate;
638 extern GTY(()) tree gfor_fndecl_in_pack;
639 extern GTY(()) tree gfor_fndecl_in_unpack;
640 extern GTY(()) tree gfor_fndecl_associated;
643 /* Coarray run-time library function decls. */
644 extern GTY(()) tree gfor_fndecl_caf_init;
645 extern GTY(()) tree gfor_fndecl_caf_finalize;
646 extern GTY(()) tree gfor_fndecl_caf_register;
647 extern GTY(()) tree gfor_fndecl_caf_critical;
648 extern GTY(()) tree gfor_fndecl_caf_end_critical;
649 extern GTY(()) tree gfor_fndecl_caf_sync_all;
650 extern GTY(()) tree gfor_fndecl_caf_sync_images;
651 extern GTY(()) tree gfor_fndecl_caf_error_stop;
652 extern GTY(()) tree gfor_fndecl_caf_error_stop_str;
654 /* Coarray global variables for num_images/this_image. */
655 extern GTY(()) tree gfort_gvar_caf_num_images;
656 extern GTY(()) tree gfort_gvar_caf_this_image;
659 /* Math functions. Many other math functions are handled in
660 trans-intrinsic.c. */
662 typedef struct GTY(()) gfc_powdecl_list {
669 extern GTY(()) gfc_powdecl_list gfor_fndecl_math_powi[4][3];
670 extern GTY(()) tree gfor_fndecl_math_ishftc4;
671 extern GTY(()) tree gfor_fndecl_math_ishftc8;
672 extern GTY(()) tree gfor_fndecl_math_ishftc16;
674 /* BLAS functions. */
675 extern GTY(()) tree gfor_fndecl_sgemm;
676 extern GTY(()) tree gfor_fndecl_dgemm;
677 extern GTY(()) tree gfor_fndecl_cgemm;
678 extern GTY(()) tree gfor_fndecl_zgemm;
680 /* String functions. */
681 extern GTY(()) tree gfor_fndecl_compare_string;
682 extern GTY(()) tree gfor_fndecl_concat_string;
683 extern GTY(()) tree gfor_fndecl_string_len_trim;
684 extern GTY(()) tree gfor_fndecl_string_index;
685 extern GTY(()) tree gfor_fndecl_string_scan;
686 extern GTY(()) tree gfor_fndecl_string_verify;
687 extern GTY(()) tree gfor_fndecl_string_trim;
688 extern GTY(()) tree gfor_fndecl_string_minmax;
689 extern GTY(()) tree gfor_fndecl_adjustl;
690 extern GTY(()) tree gfor_fndecl_adjustr;
691 extern GTY(()) tree gfor_fndecl_select_string;
692 extern GTY(()) tree gfor_fndecl_compare_string_char4;
693 extern GTY(()) tree gfor_fndecl_concat_string_char4;
694 extern GTY(()) tree gfor_fndecl_string_len_trim_char4;
695 extern GTY(()) tree gfor_fndecl_string_index_char4;
696 extern GTY(()) tree gfor_fndecl_string_scan_char4;
697 extern GTY(()) tree gfor_fndecl_string_verify_char4;
698 extern GTY(()) tree gfor_fndecl_string_trim_char4;
699 extern GTY(()) tree gfor_fndecl_string_minmax_char4;
700 extern GTY(()) tree gfor_fndecl_adjustl_char4;
701 extern GTY(()) tree gfor_fndecl_adjustr_char4;
702 extern GTY(()) tree gfor_fndecl_select_string_char4;
704 /* Conversion between character kinds. */
705 extern GTY(()) tree gfor_fndecl_convert_char1_to_char4;
706 extern GTY(()) tree gfor_fndecl_convert_char4_to_char1;
708 /* Other misc. runtime library functions. */
709 extern GTY(()) tree gfor_fndecl_size0;
710 extern GTY(()) tree gfor_fndecl_size1;
711 extern GTY(()) tree gfor_fndecl_iargc;
713 /* Implemented in Fortran. */
714 extern GTY(()) tree gfor_fndecl_sc_kind;
715 extern GTY(()) tree gfor_fndecl_si_kind;
716 extern GTY(()) tree gfor_fndecl_sr_kind;
719 /* True if node is an integer constant. */
720 #define INTEGER_CST_P(node) (TREE_CODE(node) == INTEGER_CST)
722 /* gfortran-specific declaration information, the _CONT versions denote
723 arrays with CONTIGUOUS attribute. */
728 GFC_ARRAY_ASSUMED_SHAPE,
729 GFC_ARRAY_ASSUMED_SHAPE_CONT,
730 GFC_ARRAY_ALLOCATABLE,
732 GFC_ARRAY_POINTER_CONT
735 /* Array types only. */
736 /* FIXME: the variable_size annotation here is needed because these types are
737 variable-sized in some other frontends. Due to gengtype deficiency the GTY
738 options of such types have to agree across all frontends. */
739 struct GTY((variable_size)) lang_type {
741 enum gfc_array_kind akind;
742 tree lbound[GFC_MAX_DIMENSIONS];
743 tree ubound[GFC_MAX_DIMENSIONS];
744 tree stride[GFC_MAX_DIMENSIONS];
751 tree nonrestricted_type;
756 struct GTY((variable_size)) lang_decl {
757 /* Dummy variables. */
758 tree saved_descriptor;
759 /* Assigned integer nodes. Stringlength is the IO format string's length.
760 Addr is the address of the string or the target label. Stringlength is
761 initialized to -2 and assigned to -1 when addr is assigned to the
762 address of target label. */
766 /* For assumed-shape coarrays. */
767 tree token, caf_offset;
771 #define GFC_DECL_ASSIGN_ADDR(node) DECL_LANG_SPECIFIC(node)->addr
772 #define GFC_DECL_STRING_LEN(node) DECL_LANG_SPECIFIC(node)->stringlen
773 #define GFC_DECL_SPAN(node) DECL_LANG_SPECIFIC(node)->span
774 #define GFC_DECL_TOKEN(node) DECL_LANG_SPECIFIC(node)->token
775 #define GFC_DECL_CAF_OFFSET(node) DECL_LANG_SPECIFIC(node)->caf_offset
776 #define GFC_DECL_SAVED_DESCRIPTOR(node) \
777 (DECL_LANG_SPECIFIC(node)->saved_descriptor)
778 #define GFC_DECL_PACKED_ARRAY(node) DECL_LANG_FLAG_0(node)
779 #define GFC_DECL_PARTIAL_PACKED_ARRAY(node) DECL_LANG_FLAG_1(node)
780 #define GFC_DECL_ASSIGN(node) DECL_LANG_FLAG_2(node)
781 #define GFC_DECL_COMMON_OR_EQUIV(node) DECL_LANG_FLAG_3(node)
782 #define GFC_DECL_CRAY_POINTEE(node) DECL_LANG_FLAG_4(node)
783 #define GFC_DECL_RESULT(node) DECL_LANG_FLAG_5(node)
784 #define GFC_DECL_SUBREF_ARRAY_P(node) DECL_LANG_FLAG_6(node)
786 /* An array descriptor. */
787 #define GFC_DESCRIPTOR_TYPE_P(node) TYPE_LANG_FLAG_1(node)
788 /* An array without a descriptor. */
789 #define GFC_ARRAY_TYPE_P(node) TYPE_LANG_FLAG_2(node)
790 /* Fortran POINTER type. */
791 #define GFC_POINTER_TYPE_P(node) TYPE_LANG_FLAG_3(node)
792 /* The GFC_TYPE_ARRAY_* members are present in both descriptor and
793 descriptorless array types. */
794 #define GFC_TYPE_ARRAY_LBOUND(node, dim) \
795 (TYPE_LANG_SPECIFIC(node)->lbound[dim])
796 #define GFC_TYPE_ARRAY_UBOUND(node, dim) \
797 (TYPE_LANG_SPECIFIC(node)->ubound[dim])
798 #define GFC_TYPE_ARRAY_STRIDE(node, dim) \
799 (TYPE_LANG_SPECIFIC(node)->stride[dim])
800 #define GFC_TYPE_ARRAY_RANK(node) (TYPE_LANG_SPECIFIC(node)->rank)
801 #define GFC_TYPE_ARRAY_CORANK(node) (TYPE_LANG_SPECIFIC(node)->corank)
802 #define GFC_TYPE_ARRAY_CAF_TOKEN(node) (TYPE_LANG_SPECIFIC(node)->caf_token)
803 #define GFC_TYPE_ARRAY_CAF_OFFSET(node) (TYPE_LANG_SPECIFIC(node)->caf_offset)
804 #define GFC_TYPE_ARRAY_SIZE(node) (TYPE_LANG_SPECIFIC(node)->size)
805 #define GFC_TYPE_ARRAY_OFFSET(node) (TYPE_LANG_SPECIFIC(node)->offset)
806 #define GFC_TYPE_ARRAY_AKIND(node) (TYPE_LANG_SPECIFIC(node)->akind)
807 /* Code should use gfc_get_dtype instead of accessing this directly. It may
808 not be known when the type is created. */
809 #define GFC_TYPE_ARRAY_DTYPE(node) (TYPE_LANG_SPECIFIC(node)->dtype)
810 #define GFC_TYPE_ARRAY_DATAPTR_TYPE(node) \
811 (TYPE_LANG_SPECIFIC(node)->dataptr_type)
812 #define GFC_TYPE_ARRAY_SPAN(node) (TYPE_LANG_SPECIFIC(node)->span)
813 #define GFC_TYPE_ARRAY_BASE_DECL(node, internal) \
814 (TYPE_LANG_SPECIFIC(node)->base_decl[(internal)])
817 /* Build an expression with void type. */
818 #define build1_v(code, arg) \
819 fold_build1_loc (input_location, code, void_type_node, arg)
820 #define build2_v(code, arg1, arg2) \
821 fold_build2_loc (input_location, code, void_type_node, arg1, arg2)
822 #define build3_v(code, arg1, arg2, arg3) \
823 fold_build3_loc (input_location, code, void_type_node, arg1, arg2, arg3)
824 #define build4_v(code, arg1, arg2, arg3, arg4) \
825 build4_loc (input_location, code, void_type_node, arg1, arg2, \
828 /* This group of functions allows a caller to evaluate an expression from
829 the callee's interface. It establishes a mapping between the interface's
830 dummy arguments and the caller's actual arguments, then applies that
831 mapping to a given gfc_expr.
833 You can initialize a mapping structure like so:
835 gfc_interface_mapping mapping;
837 gfc_init_interface_mapping (&mapping);
839 You should then evaluate each actual argument into a temporary
840 gfc_se structure, here called "se", and map the result to the
841 dummy argument's symbol, here called "sym":
843 gfc_add_interface_mapping (&mapping, sym, &se);
845 After adding all mappings, you should call:
847 gfc_finish_interface_mapping (&mapping, pre, post);
849 where "pre" and "post" are statement blocks for initialization
850 and finalization code respectively. You can then evaluate an
851 interface expression "expr" as follows:
853 gfc_apply_interface_mapping (&mapping, se, expr);
855 Once you've evaluated all expressions, you should free
856 the mapping structure with:
858 gfc_free_interface_mapping (&mapping); */
861 /* This structure represents a mapping from OLD to NEW, where OLD is a
862 dummy argument symbol and NEW is a symbol that represents the value
863 of an actual argument. Mappings are linked together using NEXT
864 (in no particular order). */
865 typedef struct gfc_interface_sym_mapping
867 struct gfc_interface_sym_mapping *next;
869 gfc_symtree *new_sym;
872 gfc_interface_sym_mapping;
875 /* This structure is used by callers to evaluate an expression from
876 a callee's interface. */
877 typedef struct gfc_interface_mapping
879 /* Maps the interface's dummy arguments to the values that the caller
880 is passing. The whole list is owned by this gfc_interface_mapping. */
881 gfc_interface_sym_mapping *syms;
883 /* A list of gfc_charlens that were needed when creating copies of
884 expressions. The whole list is owned by this gfc_interface_mapping. */
885 gfc_charlen *charlens;
887 gfc_interface_mapping;
889 void gfc_init_interface_mapping (gfc_interface_mapping *);
890 void gfc_free_interface_mapping (gfc_interface_mapping *);
891 void gfc_add_interface_mapping (gfc_interface_mapping *,
892 gfc_symbol *, gfc_se *, gfc_expr *);
893 void gfc_finish_interface_mapping (gfc_interface_mapping *,
894 stmtblock_t *, stmtblock_t *);
895 void gfc_apply_interface_mapping (gfc_interface_mapping *,
896 gfc_se *, gfc_expr *);
899 /* Standard error messages used in all the trans-*.c files. */
900 extern const char gfc_msg_fault[];
901 extern const char gfc_msg_wrong_return[];
903 #define OMPWS_WORKSHARE_FLAG 1 /* Set if in a workshare construct. */
904 #define OMPWS_CURR_SINGLEUNIT 2 /* Set if current gfc_code in workshare
905 construct is not workshared. */
906 #define OMPWS_SCALARIZER_WS 4 /* Set if scalarizer should attempt
907 to create parallel loops. */
908 #define OMPWS_NOWAIT 8 /* Use NOWAIT on OMP_FOR. */
909 extern int ompws_flags;
911 #endif /* GFC_TRANS_H */