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 /* Scalarization parameters. */
90 struct gfc_se *parent;
92 struct gfc_loopinfo *loop;
97 /* Denotes different types of coarray.
98 Please keep in sync with libgfortran/caf/libcaf.h. */
101 GFC_CAF_COARRAY_STATIC,
102 GFC_CAF_COARRAY_ALLOC,
109 /* Scalarization State chain. Created by walking an expression tree before
110 creating the scalarization loops. Then passed as part of a gfc_se structure
111 to translate the expression inside the loop. Note that these chains are
112 terminated by gfc_se_terminator, not NULL. A NULL pointer in a gfc_se
113 indicates to gfc_conv_* that this is a scalar expression.
114 Note that some member arrays correspond to scalarizer rank and others
115 are the variable rank. */
117 typedef struct gfc_ss_info
120 /* The ref that holds information on this section. */
122 /* The descriptor of this array. */
124 /* holds the pointer to the data array. */
126 /* To move some of the array index calculation out of the innermost loop. */
130 /* Holds the SS for a subscript. Indexed by actual dimension. */
131 struct gfc_ss *subscript[GFC_MAX_DIMENSIONS];
133 /* stride and delta are used to access this inside a scalarization loop.
134 start is used in the calculation of these. Indexed by scalarizer
136 tree start[GFC_MAX_DIMENSIONS];
137 tree end[GFC_MAX_DIMENSIONS];
138 tree stride[GFC_MAX_DIMENSIONS];
139 tree delta[GFC_MAX_DIMENSIONS];
141 /* Translation from loop dimensions to actual dimensions.
142 actual_dim = dim[loop_dim] */
143 int dim[GFC_MAX_DIMENSIONS];
149 /* A scalar value. This will be evaluated before entering the
150 scalarization loop. */
153 /* Like GFC_SS_SCALAR it evaluates the expression outside the
154 loop. Is always evaluated as a reference to the temporary.
155 Used for elemental function arguments. */
158 /* An array section. Scalarization indices will be substituted during
159 expression translation. */
162 /* A non-elemental function call returning an array. The call is executed
163 before entering the scalarization loop, storing the result in a
164 temporary. This temporary is then used inside the scalarization loop.
165 Simple assignments, e.g. a(:) = fn(), are handled without a temporary
166 as a special case. */
169 /* An array constructor. The current implementation is sub-optimal in
170 many cases. It allocated a temporary, assigns the values to it, then
171 uses this temporary inside the scalarization loop. */
174 /* A vector subscript. The vector's descriptor is cached in the
175 "descriptor" field of the associated gfc_ss_info. */
178 /* A temporary array allocated by the scalarizer. Its rank can be less
179 than that of the assignment expression. */
182 /* An intrinsic function call. Many intrinsic functions which map directly
183 to library calls are created as GFC_SS_FUNCTION nodes. */
186 /* A component of a derived type. */
191 /* SS structures can only belong to a single loopinfo. They must be added
192 otherwise they will not get freed. */
193 typedef struct gfc_ss
201 /* If type is GFC_SS_SCALAR or GFC_SS_REFERENCE. */
211 /* The rank of the temporary. May be less than the rank of the
212 assigned expression. */
217 /* All other types. */
222 /* All the SS in a loop and linked through loop_chain. The SS for an
223 expression are linked by the next pointer. */
224 struct gfc_ss *loop_chain;
227 /* This is used by assignments requiring temporaries. The bits specify which
228 loops the terms appear in. This will be 1 for the RHS expressions,
229 2 for the LHS expressions, and 3(=1|2) for the temporary. The bit
230 'where' suppresses precalculation of scalars in WHERE assignments. */
231 unsigned useflags:2, where:1, is_alloc_lhs:1;
234 #define gfc_get_ss() XCNEW (gfc_ss)
236 /* The contents of this aren't actually used. A NULL SS chain indicates a
237 scalar expression, so this pointer is used to terminate SS chains. */
238 extern gfc_ss * const gfc_ss_terminator;
240 /* Holds information about an expression while it is being scalarized. */
241 typedef struct gfc_loopinfo
248 /* All the SS involved with this loop. */
250 /* The SS describing the temporary used in an assignment. */
253 /* The scalarization loop index variables. */
254 tree loopvar[GFC_MAX_DIMENSIONS];
256 /* The bounds of the scalarization loops. */
257 tree from[GFC_MAX_DIMENSIONS];
258 tree to[GFC_MAX_DIMENSIONS];
259 gfc_ss *specloop[GFC_MAX_DIMENSIONS];
261 /* The code member contains the code for the body of the next outer loop. */
262 stmtblock_t code[GFC_MAX_DIMENSIONS];
264 /* Order in which the dimensions should be looped, innermost first. */
265 int order[GFC_MAX_DIMENSIONS];
267 /* Enum to control loop reversal. */
268 gfc_reverse reverse[GFC_MAX_DIMENSIONS];
270 /* The number of dimensions for which a temporary is used. */
273 /* If set we don't need the loop variables. */
274 unsigned array_parameter:1;
279 /* Information about a symbol that has been shadowed by a temporary. */
282 symbol_attribute attr;
288 /* Store information about a block of code together with special
289 initialization and clean-up code. This can be used to incrementally add
290 init and cleanup, and in the end put everything together to a
291 try-finally expression. */
301 /* Initialize an init/cleanup block. */
302 void gfc_start_wrapped_block (gfc_wrapped_block* block, tree code);
303 /* Add a pair of init/cleanup code to the block. Each one might be a
304 NULL_TREE if not required. */
305 void gfc_add_init_cleanup (gfc_wrapped_block* block, tree init, tree cleanup);
306 /* Finalize the block, that is, create a single expression encapsulating the
307 original code together with init and clean-up code. */
308 tree gfc_finish_wrapped_block (gfc_wrapped_block* block);
311 /* Advance the SS chain to the next term. */
312 void gfc_advance_se_ss_chain (gfc_se *);
314 /* Call this to initialize a gfc_se structure before use
315 first parameter is structure to initialize, second is
316 parent to get scalarization data from, or NULL. */
317 void gfc_init_se (gfc_se *, gfc_se *);
319 /* Create an artificial variable decl and add it to the current scope. */
320 tree gfc_create_var (tree, const char *);
321 /* Like above but doesn't add it to the current scope. */
322 tree gfc_create_var_np (tree, const char *);
324 /* Store the result of an expression in a temp variable so it can be used
325 repeatedly even if the original changes */
326 void gfc_make_safe_expr (gfc_se * se);
328 /* Makes sure se is suitable for passing as a function string parameter. */
329 void gfc_conv_string_parameter (gfc_se * se);
331 /* Compare two strings. */
332 tree gfc_build_compare_string (tree, tree, tree, tree, int, enum tree_code);
334 /* When using the gfc_conv_* make sure you understand what they do, i.e.
335 when a POST chain may be created, and what the returned expression may be
336 used for. Note that character strings have special handling. This
337 should not be a problem as most statements/operations only deal with
338 numeric/logical types. See the implementations in trans-expr.c
339 for details of the individual functions. */
341 void gfc_conv_expr (gfc_se * se, gfc_expr * expr);
342 void gfc_conv_expr_val (gfc_se * se, gfc_expr * expr);
343 void gfc_conv_expr_lhs (gfc_se * se, gfc_expr * expr);
344 void gfc_conv_expr_reference (gfc_se * se, gfc_expr *);
345 void gfc_conv_expr_type (gfc_se * se, gfc_expr *, tree);
348 void gfc_conv_scalar_char_value (gfc_symbol *sym, gfc_se *se, gfc_expr **expr);
349 tree gfc_string_to_single_character (tree len, tree str, int kind);
351 /* Find the decl containing the auxiliary variables for assigned variables. */
352 void gfc_conv_label_variable (gfc_se * se, gfc_expr * expr);
353 /* If the value is not constant, Create a temporary and copy the value. */
354 tree gfc_evaluate_now_loc (location_t, tree, stmtblock_t *);
355 tree gfc_evaluate_now (tree, stmtblock_t *);
357 /* Find the appropriate variant of a math intrinsic. */
358 tree gfc_builtin_decl_for_float_kind (enum built_in_function, int);
360 /* Intrinsic procedure handling. */
361 tree gfc_conv_intrinsic_subroutine (gfc_code *);
362 void gfc_conv_intrinsic_function (gfc_se *, gfc_expr *);
364 /* Is the intrinsic expanded inline. */
365 bool gfc_inline_intrinsic_function_p (gfc_expr *);
367 /* Does an intrinsic map directly to an external library call
368 This is true for array-returning intrinsics, unless
369 gfc_inline_intrinsic_function_p returns true. */
370 int gfc_is_intrinsic_libcall (gfc_expr *);
372 /* Used to call ordinary functions/subroutines
373 and procedure pointer components. */
374 int gfc_conv_procedure_call (gfc_se *, gfc_symbol *, gfc_actual_arglist *,
375 gfc_expr *, VEC(tree,gc) *);
377 void gfc_conv_subref_array_arg (gfc_se *, gfc_expr *, int, sym_intent, bool);
379 /* gfc_trans_* shouldn't call push/poplevel, use gfc_push/pop_scope */
381 /* Generate code for a scalar assignment. */
382 tree gfc_trans_scalar_assign (gfc_se *, gfc_se *, gfc_typespec, bool, bool,
385 /* Translate COMMON blocks. */
386 void gfc_trans_common (gfc_namespace *);
388 /* Translate a derived type constructor. */
389 void gfc_conv_structure (gfc_se *, gfc_expr *, int);
391 /* Return an expression which determines if a dummy parameter is present. */
392 tree gfc_conv_expr_present (gfc_symbol *);
393 /* Convert a missing, dummy argument into a null or zero. */
394 void gfc_conv_missing_dummy (gfc_se *, gfc_expr *, gfc_typespec, int);
396 /* Generate code to allocate a string temporary. */
397 tree gfc_conv_string_tmp (gfc_se *, tree, tree);
398 /* Get the string length variable belonging to an expression. */
399 tree gfc_get_expr_charlen (gfc_expr *);
400 /* Initialize a string length variable. */
401 void gfc_conv_string_length (gfc_charlen *, gfc_expr *, stmtblock_t *);
402 /* Ensure type sizes can be gimplified. */
403 void gfc_trans_vla_type_sizes (gfc_symbol *, stmtblock_t *);
405 /* Add an expression to the end of a block. */
406 void gfc_add_expr_to_block (stmtblock_t *, tree);
407 /* Add an expression to the beginning of a block. */
408 void gfc_prepend_expr_to_block (stmtblock_t *, tree);
409 /* Add a block to the end of a block. */
410 void gfc_add_block_to_block (stmtblock_t *, stmtblock_t *);
411 /* Add a MODIFY_EXPR to a block. */
412 void gfc_add_modify_loc (location_t, stmtblock_t *, tree, tree);
413 void gfc_add_modify (stmtblock_t *, tree, tree);
415 /* Initialize a statement block. */
416 void gfc_init_block (stmtblock_t *);
417 /* Start a new statement block. Like gfc_init_block but also starts a new
419 void gfc_start_block (stmtblock_t *);
420 /* Finish a statement block. Also closes the scope if the block was created
421 with gfc_start_block. */
422 tree gfc_finish_block (stmtblock_t *);
423 /* Merge the scope of a block with its parent. */
424 void gfc_merge_block_scope (stmtblock_t * block);
426 /* Return the backend label decl. */
427 tree gfc_get_label_decl (gfc_st_label *);
429 /* Return the decl for an external function. */
430 tree gfc_get_extern_function_decl (gfc_symbol *);
432 /* Return the decl for a function. */
433 tree gfc_get_function_decl (gfc_symbol *);
435 /* Build an ADDR_EXPR. */
436 tree gfc_build_addr_expr (tree, tree);
438 /* Build an ARRAY_REF. */
439 tree gfc_build_array_ref (tree, tree, tree);
441 /* Creates a label. Decl is artificial if label_id == NULL_TREE. */
442 tree gfc_build_label_decl (tree);
444 /* Return the decl used to hold the function return value.
445 Do not use if the function has an explicit result variable. */
446 tree gfc_get_fake_result_decl (gfc_symbol *, int);
448 /* Add a decl to the binding level for the current function. */
449 void gfc_add_decl_to_function (tree);
451 /* Make prototypes for runtime library functions. */
452 void gfc_build_builtin_function_decls (void);
454 /* Set the backend source location of a decl. */
455 void gfc_set_decl_location (tree, locus *);
457 /* Get a module symbol backend_decl if possible. */
458 bool gfc_get_module_backend_decl (gfc_symbol *);
460 /* Return the variable decl for a symbol. */
461 tree gfc_get_symbol_decl (gfc_symbol *);
463 /* Build a static initializer. */
464 tree gfc_conv_initializer (gfc_expr *, gfc_typespec *, tree, bool, bool, bool);
466 /* Assign a default initializer to a derived type. */
467 void gfc_init_default_dt (gfc_symbol *, stmtblock_t *, bool);
469 /* Substitute a temporary variable in place of the real one. */
470 void gfc_shadow_sym (gfc_symbol *, tree, gfc_saved_var *);
472 /* Restore the original variable. */
473 void gfc_restore_sym (gfc_symbol *, gfc_saved_var *);
475 /* Setting a decl assembler name, mangling it according to target rules
476 (like Windows @NN decorations). */
477 void gfc_set_decl_assembler_name (tree, tree);
479 /* Returns true if a variable of specified size should go on the stack. */
480 int gfc_can_put_var_on_stack (tree);
482 /* Allocate the lang-specific part of a decl node. */
483 void gfc_allocate_lang_decl (tree);
485 /* Advance along a TREE_CHAIN. */
486 tree gfc_advance_chain (tree, int);
488 /* Create a decl for a function. */
489 void gfc_create_function_decl (gfc_namespace *, bool);
490 /* Generate the code for a function. */
491 void gfc_generate_function_code (gfc_namespace *);
492 /* Output a BLOCK DATA program unit. */
493 void gfc_generate_block_data (gfc_namespace *);
494 /* Output a decl for a module variable. */
495 void gfc_generate_module_vars (gfc_namespace *);
496 /* Get the appropriate return statement for a procedure. */
497 tree gfc_generate_return (void);
499 struct GTY(()) module_htab_entry {
502 htab_t GTY ((param_is (union tree_node))) decls;
505 struct module_htab_entry *gfc_find_module (const char *);
506 void gfc_module_add_decl (struct module_htab_entry *, tree);
508 /* Get and set the current location. */
509 void gfc_save_backend_locus (locus *);
510 void gfc_set_backend_locus (locus *);
511 void gfc_restore_backend_locus (locus *);
513 /* Handle static constructor functions. */
514 extern GTY(()) tree gfc_static_ctors;
515 void gfc_generate_constructors (void);
517 /* Get the string length of an array constructor. */
518 bool get_array_ctor_strlen (stmtblock_t *, gfc_constructor_base, tree *);
520 /* Mark a condition as likely or unlikely. */
521 tree gfc_likely (tree);
522 tree gfc_unlikely (tree);
524 /* Generate a runtime error call. */
525 tree gfc_trans_runtime_error (bool, locus*, const char*, ...);
527 /* Generate a runtime warning/error check. */
528 void gfc_trans_runtime_check (bool, bool, tree, stmtblock_t *, locus *,
531 /* Generate a runtime check for same string length. */
532 void gfc_trans_same_strlen_check (const char*, locus*, tree, tree,
535 /* Generate a call to free() after checking that its arg is non-NULL. */
536 tree gfc_call_free (tree);
538 /* Allocate memory after performing a few checks. */
539 tree gfc_call_malloc (stmtblock_t *, tree, tree);
541 /* Build a memcpy call. */
542 tree gfc_build_memcpy_call (tree, tree, tree);
544 /* Allocate memory for allocatable variables, with optional status variable. */
545 void gfc_allocate_allocatable (stmtblock_t*, tree, tree, tree,
546 tree, tree, tree, gfc_expr*);
548 /* Allocate memory, with optional status variable. */
549 void gfc_allocate_using_malloc (stmtblock_t *, tree, tree, tree);
551 /* Generate code to deallocate an array. */
552 tree gfc_deallocate_with_status (tree, tree, bool, gfc_expr*);
553 tree gfc_deallocate_scalar_with_status (tree, tree, bool, gfc_expr*, gfc_typespec);
555 /* Generate code to call realloc(). */
556 tree gfc_call_realloc (stmtblock_t *, tree, tree);
558 /* Generate code for an assignment, includes scalarization. */
559 tree gfc_trans_assignment (gfc_expr *, gfc_expr *, bool, bool);
561 /* Generate code for a pointer assignment. */
562 tree gfc_trans_pointer_assignment (gfc_expr *, gfc_expr *);
564 /* Initialize function decls for library functions. */
565 void gfc_build_intrinsic_lib_fndecls (void);
566 /* Create function decls for IO library functions. */
567 void gfc_trans_io_runtime_check (tree, tree, int, const char *, stmtblock_t *);
568 void gfc_build_io_library_fndecls (void);
569 /* Build a function decl for a library function. */
570 tree gfc_build_library_function_decl (tree, tree, int, ...);
571 tree gfc_build_library_function_decl_with_spec (tree name, const char *spec,
572 tree rettype, int nargs, ...);
574 /* Process the local variable decls of a block construct. */
575 void gfc_process_block_locals (gfc_namespace*);
577 /* Output initialization/clean-up code that was deferred. */
578 void gfc_trans_deferred_vars (gfc_symbol*, gfc_wrapped_block *);
581 tree pushdecl (tree);
582 tree pushdecl_top_level (tree);
583 void pushlevel (int);
584 tree poplevel (int, int, int);
585 tree getdecls (void);
586 tree gfc_truthvalue_conversion (tree);
587 tree gfc_builtin_function (tree);
589 /* In trans-types.c. */
590 struct array_descr_info;
591 bool gfc_get_array_descr_info (const_tree, struct array_descr_info *);
593 /* In trans-openmp.c */
594 bool gfc_omp_privatize_by_reference (const_tree);
595 enum omp_clause_default_kind gfc_omp_predetermined_sharing (tree);
596 tree gfc_omp_report_decl (tree);
597 tree gfc_omp_clause_default_ctor (tree, tree, tree);
598 tree gfc_omp_clause_copy_ctor (tree, tree, tree);
599 tree gfc_omp_clause_assign_op (tree, tree, tree);
600 tree gfc_omp_clause_dtor (tree, tree);
601 bool gfc_omp_disregard_value_expr (tree, bool);
602 bool gfc_omp_private_debug_clause (tree, bool);
603 bool gfc_omp_private_outer_ref (tree);
604 struct gimplify_omp_ctx;
605 void gfc_omp_firstprivatize_type_sizes (struct gimplify_omp_ctx *, tree);
607 /* Runtime library function decls. */
608 extern GTY(()) tree gfor_fndecl_pause_numeric;
609 extern GTY(()) tree gfor_fndecl_pause_string;
610 extern GTY(()) tree gfor_fndecl_stop_numeric;
611 extern GTY(()) tree gfor_fndecl_stop_numeric_f08;
612 extern GTY(()) tree gfor_fndecl_stop_string;
613 extern GTY(()) tree gfor_fndecl_error_stop_numeric;
614 extern GTY(()) tree gfor_fndecl_error_stop_string;
615 extern GTY(()) tree gfor_fndecl_runtime_error;
616 extern GTY(()) tree gfor_fndecl_runtime_error_at;
617 extern GTY(()) tree gfor_fndecl_runtime_warning_at;
618 extern GTY(()) tree gfor_fndecl_os_error;
619 extern GTY(()) tree gfor_fndecl_generate_error;
620 extern GTY(()) tree gfor_fndecl_set_fpe;
621 extern GTY(()) tree gfor_fndecl_set_options;
622 extern GTY(()) tree gfor_fndecl_ttynam;
623 extern GTY(()) tree gfor_fndecl_ctime;
624 extern GTY(()) tree gfor_fndecl_fdate;
625 extern GTY(()) tree gfor_fndecl_in_pack;
626 extern GTY(()) tree gfor_fndecl_in_unpack;
627 extern GTY(()) tree gfor_fndecl_associated;
630 /* Coarray run-time library function decls. */
631 extern GTY(()) tree gfor_fndecl_caf_init;
632 extern GTY(()) tree gfor_fndecl_caf_finalize;
633 extern GTY(()) tree gfor_fndecl_caf_register;
634 extern GTY(()) tree gfor_fndecl_caf_critical;
635 extern GTY(()) tree gfor_fndecl_caf_end_critical;
636 extern GTY(()) tree gfor_fndecl_caf_sync_all;
637 extern GTY(()) tree gfor_fndecl_caf_sync_images;
638 extern GTY(()) tree gfor_fndecl_caf_error_stop;
639 extern GTY(()) tree gfor_fndecl_caf_error_stop_str;
641 /* Coarray global variables for num_images/this_image. */
642 extern GTY(()) tree gfort_gvar_caf_num_images;
643 extern GTY(()) tree gfort_gvar_caf_this_image;
646 /* Math functions. Many other math functions are handled in
647 trans-intrinsic.c. */
649 typedef struct GTY(()) gfc_powdecl_list {
656 extern GTY(()) gfc_powdecl_list gfor_fndecl_math_powi[4][3];
657 extern GTY(()) tree gfor_fndecl_math_ishftc4;
658 extern GTY(()) tree gfor_fndecl_math_ishftc8;
659 extern GTY(()) tree gfor_fndecl_math_ishftc16;
661 /* BLAS functions. */
662 extern GTY(()) tree gfor_fndecl_sgemm;
663 extern GTY(()) tree gfor_fndecl_dgemm;
664 extern GTY(()) tree gfor_fndecl_cgemm;
665 extern GTY(()) tree gfor_fndecl_zgemm;
667 /* String functions. */
668 extern GTY(()) tree gfor_fndecl_compare_string;
669 extern GTY(()) tree gfor_fndecl_concat_string;
670 extern GTY(()) tree gfor_fndecl_string_len_trim;
671 extern GTY(()) tree gfor_fndecl_string_index;
672 extern GTY(()) tree gfor_fndecl_string_scan;
673 extern GTY(()) tree gfor_fndecl_string_verify;
674 extern GTY(()) tree gfor_fndecl_string_trim;
675 extern GTY(()) tree gfor_fndecl_string_minmax;
676 extern GTY(()) tree gfor_fndecl_adjustl;
677 extern GTY(()) tree gfor_fndecl_adjustr;
678 extern GTY(()) tree gfor_fndecl_select_string;
679 extern GTY(()) tree gfor_fndecl_compare_string_char4;
680 extern GTY(()) tree gfor_fndecl_concat_string_char4;
681 extern GTY(()) tree gfor_fndecl_string_len_trim_char4;
682 extern GTY(()) tree gfor_fndecl_string_index_char4;
683 extern GTY(()) tree gfor_fndecl_string_scan_char4;
684 extern GTY(()) tree gfor_fndecl_string_verify_char4;
685 extern GTY(()) tree gfor_fndecl_string_trim_char4;
686 extern GTY(()) tree gfor_fndecl_string_minmax_char4;
687 extern GTY(()) tree gfor_fndecl_adjustl_char4;
688 extern GTY(()) tree gfor_fndecl_adjustr_char4;
689 extern GTY(()) tree gfor_fndecl_select_string_char4;
691 /* Conversion between character kinds. */
692 extern GTY(()) tree gfor_fndecl_convert_char1_to_char4;
693 extern GTY(()) tree gfor_fndecl_convert_char4_to_char1;
695 /* Other misc. runtime library functions. */
696 extern GTY(()) tree gfor_fndecl_size0;
697 extern GTY(()) tree gfor_fndecl_size1;
698 extern GTY(()) tree gfor_fndecl_iargc;
700 /* Implemented in Fortran. */
701 extern GTY(()) tree gfor_fndecl_sc_kind;
702 extern GTY(()) tree gfor_fndecl_si_kind;
703 extern GTY(()) tree gfor_fndecl_sr_kind;
706 /* True if node is an integer constant. */
707 #define INTEGER_CST_P(node) (TREE_CODE(node) == INTEGER_CST)
709 /* gfortran-specific declaration information, the _CONT versions denote
710 arrays with CONTIGUOUS attribute. */
715 GFC_ARRAY_ASSUMED_SHAPE,
716 GFC_ARRAY_ASSUMED_SHAPE_CONT,
717 GFC_ARRAY_ALLOCATABLE,
719 GFC_ARRAY_POINTER_CONT
722 /* Array types only. */
723 /* FIXME: the variable_size annotation here is needed because these types are
724 variable-sized in some other frontends. Due to gengtype deficiency the GTY
725 options of such types have to agree across all frontends. */
726 struct GTY((variable_size)) lang_type {
728 enum gfc_array_kind akind;
729 tree lbound[GFC_MAX_DIMENSIONS];
730 tree ubound[GFC_MAX_DIMENSIONS];
731 tree stride[GFC_MAX_DIMENSIONS];
738 tree nonrestricted_type;
743 struct GTY((variable_size)) lang_decl {
744 /* Dummy variables. */
745 tree saved_descriptor;
746 /* Assigned integer nodes. Stringlength is the IO format string's length.
747 Addr is the address of the string or the target label. Stringlength is
748 initialized to -2 and assigned to -1 when addr is assigned to the
749 address of target label. */
756 #define GFC_DECL_ASSIGN_ADDR(node) DECL_LANG_SPECIFIC(node)->addr
757 #define GFC_DECL_STRING_LEN(node) DECL_LANG_SPECIFIC(node)->stringlen
758 #define GFC_DECL_SPAN(node) DECL_LANG_SPECIFIC(node)->span
759 #define GFC_DECL_SAVED_DESCRIPTOR(node) \
760 (DECL_LANG_SPECIFIC(node)->saved_descriptor)
761 #define GFC_DECL_PACKED_ARRAY(node) DECL_LANG_FLAG_0(node)
762 #define GFC_DECL_PARTIAL_PACKED_ARRAY(node) DECL_LANG_FLAG_1(node)
763 #define GFC_DECL_ASSIGN(node) DECL_LANG_FLAG_2(node)
764 #define GFC_DECL_COMMON_OR_EQUIV(node) DECL_LANG_FLAG_3(node)
765 #define GFC_DECL_CRAY_POINTEE(node) DECL_LANG_FLAG_4(node)
766 #define GFC_DECL_RESULT(node) DECL_LANG_FLAG_5(node)
767 #define GFC_DECL_SUBREF_ARRAY_P(node) DECL_LANG_FLAG_6(node)
769 /* An array descriptor. */
770 #define GFC_DESCRIPTOR_TYPE_P(node) TYPE_LANG_FLAG_1(node)
771 /* An array without a descriptor. */
772 #define GFC_ARRAY_TYPE_P(node) TYPE_LANG_FLAG_2(node)
773 /* Fortran POINTER type. */
774 #define GFC_POINTER_TYPE_P(node) TYPE_LANG_FLAG_3(node)
775 /* The GFC_TYPE_ARRAY_* members are present in both descriptor and
776 descriptorless array types. */
777 #define GFC_TYPE_ARRAY_LBOUND(node, dim) \
778 (TYPE_LANG_SPECIFIC(node)->lbound[dim])
779 #define GFC_TYPE_ARRAY_UBOUND(node, dim) \
780 (TYPE_LANG_SPECIFIC(node)->ubound[dim])
781 #define GFC_TYPE_ARRAY_STRIDE(node, dim) \
782 (TYPE_LANG_SPECIFIC(node)->stride[dim])
783 #define GFC_TYPE_ARRAY_RANK(node) (TYPE_LANG_SPECIFIC(node)->rank)
784 #define GFC_TYPE_ARRAY_CORANK(node) (TYPE_LANG_SPECIFIC(node)->corank)
785 #define GFC_TYPE_ARRAY_CAF_TOKEN(node) (TYPE_LANG_SPECIFIC(node)->caf_token)
786 #define GFC_TYPE_ARRAY_CAF_OFFSET(node) (TYPE_LANG_SPECIFIC(node)->caf_offset)
787 #define GFC_TYPE_ARRAY_SIZE(node) (TYPE_LANG_SPECIFIC(node)->size)
788 #define GFC_TYPE_ARRAY_OFFSET(node) (TYPE_LANG_SPECIFIC(node)->offset)
789 #define GFC_TYPE_ARRAY_AKIND(node) (TYPE_LANG_SPECIFIC(node)->akind)
790 /* Code should use gfc_get_dtype instead of accessing this directly. It may
791 not be known when the type is created. */
792 #define GFC_TYPE_ARRAY_DTYPE(node) (TYPE_LANG_SPECIFIC(node)->dtype)
793 #define GFC_TYPE_ARRAY_DATAPTR_TYPE(node) \
794 (TYPE_LANG_SPECIFIC(node)->dataptr_type)
795 #define GFC_TYPE_ARRAY_SPAN(node) (TYPE_LANG_SPECIFIC(node)->span)
796 #define GFC_TYPE_ARRAY_BASE_DECL(node, internal) \
797 (TYPE_LANG_SPECIFIC(node)->base_decl[(internal)])
800 /* Build an expression with void type. */
801 #define build1_v(code, arg) \
802 fold_build1_loc (input_location, code, void_type_node, arg)
803 #define build2_v(code, arg1, arg2) \
804 fold_build2_loc (input_location, code, void_type_node, arg1, arg2)
805 #define build3_v(code, arg1, arg2, arg3) \
806 fold_build3_loc (input_location, code, void_type_node, arg1, arg2, arg3)
807 #define build4_v(code, arg1, arg2, arg3, arg4) \
808 build4_loc (input_location, code, void_type_node, arg1, arg2, \
811 /* This group of functions allows a caller to evaluate an expression from
812 the callee's interface. It establishes a mapping between the interface's
813 dummy arguments and the caller's actual arguments, then applies that
814 mapping to a given gfc_expr.
816 You can initialize a mapping structure like so:
818 gfc_interface_mapping mapping;
820 gfc_init_interface_mapping (&mapping);
822 You should then evaluate each actual argument into a temporary
823 gfc_se structure, here called "se", and map the result to the
824 dummy argument's symbol, here called "sym":
826 gfc_add_interface_mapping (&mapping, sym, &se);
828 After adding all mappings, you should call:
830 gfc_finish_interface_mapping (&mapping, pre, post);
832 where "pre" and "post" are statement blocks for initialization
833 and finalization code respectively. You can then evaluate an
834 interface expression "expr" as follows:
836 gfc_apply_interface_mapping (&mapping, se, expr);
838 Once you've evaluated all expressions, you should free
839 the mapping structure with:
841 gfc_free_interface_mapping (&mapping); */
844 /* This structure represents a mapping from OLD to NEW, where OLD is a
845 dummy argument symbol and NEW is a symbol that represents the value
846 of an actual argument. Mappings are linked together using NEXT
847 (in no particular order). */
848 typedef struct gfc_interface_sym_mapping
850 struct gfc_interface_sym_mapping *next;
852 gfc_symtree *new_sym;
855 gfc_interface_sym_mapping;
858 /* This structure is used by callers to evaluate an expression from
859 a callee's interface. */
860 typedef struct gfc_interface_mapping
862 /* Maps the interface's dummy arguments to the values that the caller
863 is passing. The whole list is owned by this gfc_interface_mapping. */
864 gfc_interface_sym_mapping *syms;
866 /* A list of gfc_charlens that were needed when creating copies of
867 expressions. The whole list is owned by this gfc_interface_mapping. */
868 gfc_charlen *charlens;
870 gfc_interface_mapping;
872 void gfc_init_interface_mapping (gfc_interface_mapping *);
873 void gfc_free_interface_mapping (gfc_interface_mapping *);
874 void gfc_add_interface_mapping (gfc_interface_mapping *,
875 gfc_symbol *, gfc_se *, gfc_expr *);
876 void gfc_finish_interface_mapping (gfc_interface_mapping *,
877 stmtblock_t *, stmtblock_t *);
878 void gfc_apply_interface_mapping (gfc_interface_mapping *,
879 gfc_se *, gfc_expr *);
882 /* Standard error messages used in all the trans-*.c files. */
883 extern const char gfc_msg_fault[];
884 extern const char gfc_msg_wrong_return[];
886 #define OMPWS_WORKSHARE_FLAG 1 /* Set if in a workshare construct. */
887 #define OMPWS_CURR_SINGLEUNIT 2 /* Set if current gfc_code in workshare
888 construct is not workshared. */
889 #define OMPWS_SCALARIZER_WS 4 /* Set if scalarizer should attempt
890 to create parallel loops. */
891 #define OMPWS_NOWAIT 8 /* Use NOWAIT on OMP_FOR. */
892 extern int ompws_flags;
894 #endif /* GFC_TRANS_H */