1 /* Header for code translation functions
2 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
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 /* Scalarization parameters. */
85 struct gfc_se
*parent
;
87 struct gfc_loopinfo
*loop
;
92 /* Scalarization State chain. Created by walking an expression tree before
93 creating the scalarization loops. Then passed as part of a gfc_se structure
94 to translate the expression inside the loop. Note that these chains are
95 terminated by gfc_se_terminator, not NULL. A NULL pointer in a gfc_se
96 indicates to gfc_conv_* that this is a scalar expression.
97 Note that some member arrays correspond to scalarizer rank and others
98 are the variable rank. */
100 typedef struct gfc_ss_info
103 /* The ref that holds information on this section. */
105 /* The descriptor of this array. */
107 /* holds the pointer to the data array. */
109 /* To move some of the array index calculation out of the innermost loop. */
113 /* Holds the SS for a subscript. Indexed by actual dimension. */
114 struct gfc_ss
*subscript
[GFC_MAX_DIMENSIONS
];
116 /* stride and delta are used to access this inside a scalarization loop.
117 start is used in the calculation of these. Indexed by scalarizer
119 tree start
[GFC_MAX_DIMENSIONS
];
120 tree end
[GFC_MAX_DIMENSIONS
];
121 tree stride
[GFC_MAX_DIMENSIONS
];
122 tree delta
[GFC_MAX_DIMENSIONS
];
124 /* Translation from loop dimensions to actual dimensions.
125 actual_dim = dim[loop_dim] */
126 int dim
[GFC_MAX_DIMENSIONS
];
132 /* A scalar value. This will be evaluated before entering the
133 scalarization loop. */
136 /* Like GFC_SS_SCALAR it evaluates the expression outside the
137 loop. Is always evaluated as a reference to the temporary.
138 Used for elemental function arguments. */
141 /* An array section. Scalarization indices will be substituted during
142 expression translation. */
145 /* A non-elemental function call returning an array. The call is executed
146 before entering the scalarization loop, storing the result in a
147 temporary. This temporary is then used inside the scalarization loop.
148 Simple assignments, e.g. a(:) = fn(), are handled without a temporary
149 as a special case. */
152 /* An array constructor. The current implementation is sub-optimal in
153 many cases. It allocated a temporary, assigns the values to it, then
154 uses this temporary inside the scalarization loop. */
157 /* A vector subscript. The vector's descriptor is cached in the
158 "descriptor" field of the associated gfc_ss_info. */
161 /* A temporary array allocated by the scalarizer. Its rank can be less
162 than that of the assignment expression. */
165 /* An intrinsic function call. Many intrinsic functions which map directly
166 to library calls are created as GFC_SS_FUNCTION nodes. */
169 /* A component of a derived type. */
174 /* SS structures can only belong to a single loopinfo. They must be added
175 otherwise they will not get freed. */
176 typedef struct gfc_ss
184 /* If type is GFC_SS_SCALAR or GFC_SS_REFERENCE. */
194 /* The rank of the temporary. May be less than the rank of the
195 assigned expression. */
200 /* All other types. */
205 /* All the SS in a loop and linked through loop_chain. The SS for an
206 expression are linked by the next pointer. */
207 struct gfc_ss
*loop_chain
;
210 /* This is used by assignments requiring temporaries. The bits specify which
211 loops the terms appear in. This will be 1 for the RHS expressions,
212 2 for the LHS expressions, and 3(=1|2) for the temporary. The bit
213 'where' suppresses precalculation of scalars in WHERE assignments. */
214 unsigned useflags
:2, where
:1;
217 #define gfc_get_ss() XCNEW (gfc_ss)
219 /* The contents of this aren't actually used. A NULL SS chain indicates a
220 scalar expression, so this pointer is used to terminate SS chains. */
221 extern gfc_ss
* const gfc_ss_terminator
;
223 /* Holds information about an expression while it is being scalarized. */
224 typedef struct gfc_loopinfo
231 /* All the SS involved with this loop. */
233 /* The SS describing the temporary used in an assignment. */
236 /* The scalarization loop index variables. */
237 tree loopvar
[GFC_MAX_DIMENSIONS
];
239 /* The bounds of the scalarization loops. */
240 tree from
[GFC_MAX_DIMENSIONS
];
241 tree to
[GFC_MAX_DIMENSIONS
];
242 gfc_ss
*specloop
[GFC_MAX_DIMENSIONS
];
244 /* The code member contains the code for the body of the next outer loop. */
245 stmtblock_t code
[GFC_MAX_DIMENSIONS
];
247 /* Order in which the dimensions should be looped, innermost first. */
248 int order
[GFC_MAX_DIMENSIONS
];
250 /* Enum to control loop reversal. */
251 gfc_reverse reverse
[GFC_MAX_DIMENSIONS
];
253 /* The number of dimensions for which a temporary is used. */
256 /* If set we don't need the loop variables. */
257 unsigned array_parameter
:1;
262 /* Information about a symbol that has been shadowed by a temporary. */
265 symbol_attribute attr
;
271 /* Store information about a block of code together with special
272 initialization and clean-up code. This can be used to incrementally add
273 init and cleanup, and in the end put everything together to a
274 try-finally expression. */
284 /* Initialize an init/cleanup block. */
285 void gfc_start_wrapped_block (gfc_wrapped_block
* block
, tree code
);
286 /* Add a pair of init/cleanup code to the block. Each one might be a
287 NULL_TREE if not required. */
288 void gfc_add_init_cleanup (gfc_wrapped_block
* block
, tree init
, tree cleanup
);
289 /* Finalize the block, that is, create a single expression encapsulating the
290 original code together with init and clean-up code. */
291 tree
gfc_finish_wrapped_block (gfc_wrapped_block
* block
);
294 /* Advance the SS chain to the next term. */
295 void gfc_advance_se_ss_chain (gfc_se
*);
297 /* Call this to initialize a gfc_se structure before use
298 first parameter is structure to initialize, second is
299 parent to get scalarization data from, or NULL. */
300 void gfc_init_se (gfc_se
*, gfc_se
*);
302 /* Create an artificial variable decl and add it to the current scope. */
303 tree
gfc_create_var (tree
, const char *);
304 /* Like above but doesn't add it to the current scope. */
305 tree
gfc_create_var_np (tree
, const char *);
307 /* Store the result of an expression in a temp variable so it can be used
308 repeatedly even if the original changes */
309 void gfc_make_safe_expr (gfc_se
* se
);
311 /* Makes sure se is suitable for passing as a function string parameter. */
312 void gfc_conv_string_parameter (gfc_se
* se
);
314 /* Compare two strings. */
315 tree
gfc_build_compare_string (tree
, tree
, tree
, tree
, int, enum tree_code
);
317 /* Add an item to the end of TREE_LIST. */
318 tree
gfc_chainon_list (tree
, tree
);
320 /* When using the gfc_conv_* make sure you understand what they do, i.e.
321 when a POST chain may be created, and what the returned expression may be
322 used for. Note that character strings have special handling. This
323 should not be a problem as most statements/operations only deal with
324 numeric/logical types. See the implementations in trans-expr.c
325 for details of the individual functions. */
327 void gfc_conv_expr (gfc_se
* se
, gfc_expr
* expr
);
328 void gfc_conv_expr_val (gfc_se
* se
, gfc_expr
* expr
);
329 void gfc_conv_expr_lhs (gfc_se
* se
, gfc_expr
* expr
);
330 void gfc_conv_expr_reference (gfc_se
* se
, gfc_expr
*);
331 void gfc_conv_expr_type (gfc_se
* se
, gfc_expr
*, tree
);
334 void gfc_conv_scalar_char_value (gfc_symbol
*sym
, gfc_se
*se
, gfc_expr
**expr
);
335 tree
gfc_string_to_single_character (tree len
, tree str
, int kind
);
337 /* Find the decl containing the auxiliary variables for assigned variables. */
338 void gfc_conv_label_variable (gfc_se
* se
, gfc_expr
* expr
);
339 /* If the value is not constant, Create a temporary and copy the value. */
340 tree
gfc_evaluate_now (tree
, stmtblock_t
*);
342 /* Intrinsic function handling. */
343 void gfc_conv_intrinsic_function (gfc_se
*, gfc_expr
*);
345 /* Does an intrinsic map directly to an external library call. */
346 int gfc_is_intrinsic_libcall (gfc_expr
*);
348 tree
gfc_conv_intrinsic_move_alloc (gfc_code
*);
350 /* Used to call ordinary functions/subroutines
351 and procedure pointer components. */
352 int gfc_conv_procedure_call (gfc_se
*, gfc_symbol
*, gfc_actual_arglist
*,
353 gfc_expr
*, VEC(tree
,gc
) *);
355 void gfc_conv_subref_array_arg (gfc_se
*, gfc_expr
*, int, sym_intent
, bool);
357 /* gfc_trans_* shouldn't call push/poplevel, use gfc_push/pop_scope */
359 /* Generate code for a scalar assignment. */
360 tree
gfc_trans_scalar_assign (gfc_se
*, gfc_se
*, gfc_typespec
, bool, bool,
363 /* Translate COMMON blocks. */
364 void gfc_trans_common (gfc_namespace
*);
366 /* Translate a derived type constructor. */
367 void gfc_conv_structure (gfc_se
*, gfc_expr
*, int);
369 /* Return an expression which determines if a dummy parameter is present. */
370 tree
gfc_conv_expr_present (gfc_symbol
*);
371 /* Convert a missing, dummy argument into a null or zero. */
372 void gfc_conv_missing_dummy (gfc_se
*, gfc_expr
*, gfc_typespec
, int);
374 /* Generate code to allocate a string temporary. */
375 tree
gfc_conv_string_tmp (gfc_se
*, tree
, tree
);
376 /* Get the string length variable belonging to an expression. */
377 tree
gfc_get_expr_charlen (gfc_expr
*);
378 /* Initialize a string length variable. */
379 void gfc_conv_string_length (gfc_charlen
*, gfc_expr
*, stmtblock_t
*);
380 /* Ensure type sizes can be gimplified. */
381 void gfc_trans_vla_type_sizes (gfc_symbol
*, stmtblock_t
*);
383 /* Add an expression to the end of a block. */
384 void gfc_add_expr_to_block (stmtblock_t
*, tree
);
385 /* Add a block to the end of a block. */
386 void gfc_add_block_to_block (stmtblock_t
*, stmtblock_t
*);
387 /* Add a MODIFY_EXPR to a block. */
388 void gfc_add_modify (stmtblock_t
*, tree
, tree
);
390 /* Initialize a statement block. */
391 void gfc_init_block (stmtblock_t
*);
392 /* Start a new statement block. Like gfc_init_block but also starts a new
394 void gfc_start_block (stmtblock_t
*);
395 /* Finish a statement block. Also closes the scope if the block was created
396 with gfc_start_block. */
397 tree
gfc_finish_block (stmtblock_t
*);
398 /* Merge the scope of a block with its parent. */
399 void gfc_merge_block_scope (stmtblock_t
* block
);
401 /* Return the backend label decl. */
402 tree
gfc_get_label_decl (gfc_st_label
*);
404 /* Return the decl for an external function. */
405 tree
gfc_get_extern_function_decl (gfc_symbol
*);
407 /* Return the decl for a function. */
408 tree
gfc_get_function_decl (gfc_symbol
*);
410 /* Build an ADDR_EXPR. */
411 tree
gfc_build_addr_expr (tree
, tree
);
413 /* Build an ARRAY_REF. */
414 tree
gfc_build_array_ref (tree
, tree
, tree
);
416 /* Creates a label. Decl is artificial if label_id == NULL_TREE. */
417 tree
gfc_build_label_decl (tree
);
419 /* Return the decl used to hold the function return value.
420 Do not use if the function has an explicit result variable. */
421 tree
gfc_get_fake_result_decl (gfc_symbol
*, int);
423 /* Add a decl to the binding level for the current function. */
424 void gfc_add_decl_to_function (tree
);
426 /* Make prototypes for runtime library functions. */
427 void gfc_build_builtin_function_decls (void);
429 /* Set the backend source location of a decl. */
430 void gfc_set_decl_location (tree
, locus
*);
432 /* Return the variable decl for a symbol. */
433 tree
gfc_get_symbol_decl (gfc_symbol
*);
435 /* Build a static initializer. */
436 tree
gfc_conv_initializer (gfc_expr
*, gfc_typespec
*, tree
, bool, bool);
438 /* Assign a default initializer to a derived type. */
439 void gfc_init_default_dt (gfc_symbol
*, stmtblock_t
*, bool);
441 /* Substitute a temporary variable in place of the real one. */
442 void gfc_shadow_sym (gfc_symbol
*, tree
, gfc_saved_var
*);
444 /* Restore the original variable. */
445 void gfc_restore_sym (gfc_symbol
*, gfc_saved_var
*);
447 /* Setting a decl assembler name, mangling it according to target rules
448 (like Windows @NN decorations). */
449 void gfc_set_decl_assembler_name (tree
, tree
);
451 /* Returns true if a variable of specified size should go on the stack. */
452 int gfc_can_put_var_on_stack (tree
);
454 /* Allocate the lang-specific part of a decl node. */
455 void gfc_allocate_lang_decl (tree
);
457 /* Advance along a TREE_CHAIN. */
458 tree
gfc_advance_chain (tree
, int);
460 /* Create a decl for a function. */
461 void gfc_create_function_decl (gfc_namespace
*, bool);
462 /* Generate the code for a function. */
463 void gfc_generate_function_code (gfc_namespace
*);
464 /* Output a BLOCK DATA program unit. */
465 void gfc_generate_block_data (gfc_namespace
*);
466 /* Output a decl for a module variable. */
467 void gfc_generate_module_vars (gfc_namespace
*);
468 /* Get the appropriate return statement for a procedure. */
469 tree
gfc_generate_return (void);
471 struct GTY(()) module_htab_entry
{
474 htab_t
GTY ((param_is (union tree_node
))) decls
;
477 struct module_htab_entry
*gfc_find_module (const char *);
478 void gfc_module_add_decl (struct module_htab_entry
*, tree
);
480 /* Get and set the current location. */
481 void gfc_set_backend_locus (locus
*);
482 void gfc_get_backend_locus (locus
*);
484 /* Handle static constructor functions. */
485 extern GTY(()) tree gfc_static_ctors
;
486 void gfc_generate_constructors (void);
488 /* Get the string length of an array constructor. */
489 bool get_array_ctor_strlen (stmtblock_t
*, gfc_constructor_base
, tree
*);
491 /* Generate a runtime error call. */
492 tree
gfc_trans_runtime_error (bool, locus
*, const char*, ...);
493 tree
gfc_trans_runtime_error_vararg (bool, locus
*, const char*, va_list);
495 /* Generate a runtime warning/error check. */
496 void gfc_trans_runtime_check (bool, bool, tree
, stmtblock_t
*, locus
*,
499 /* Generate a runtime check for same string length. */
500 void gfc_trans_same_strlen_check (const char*, locus
*, tree
, tree
,
503 /* Generate a call to free() after checking that its arg is non-NULL. */
504 tree
gfc_call_free (tree
);
506 /* Allocate memory after performing a few checks. */
507 tree
gfc_call_malloc (stmtblock_t
*, tree
, tree
);
509 /* Build a memcpy call. */
510 tree
gfc_build_memcpy_call (tree
, tree
, tree
);
512 /* Allocate memory for arrays, with optional status variable. */
513 tree
gfc_allocate_array_with_status (stmtblock_t
*, tree
, tree
, tree
, gfc_expr
*);
515 /* Allocate memory, with optional status variable. */
516 tree
gfc_allocate_with_status (stmtblock_t
*, tree
, tree
);
518 /* Generate code to deallocate an array. */
519 tree
gfc_deallocate_with_status (tree
, tree
, bool, gfc_expr
*);
521 /* Generate code to call realloc(). */
522 tree
gfc_call_realloc (stmtblock_t
*, tree
, tree
);
524 /* Generate code for an assignment, includes scalarization. */
525 tree
gfc_trans_assignment (gfc_expr
*, gfc_expr
*, bool, bool);
527 /* Generate code for a pointer assignment. */
528 tree
gfc_trans_pointer_assignment (gfc_expr
*, gfc_expr
*);
530 /* Generate code to assign typebound procedures to a derived vtab. */
531 void gfc_trans_assign_vtab_procs (stmtblock_t
*, gfc_symbol
*, gfc_symbol
*);
533 /* Initialize function decls for library functions. */
534 void gfc_build_intrinsic_lib_fndecls (void);
535 /* Create function decls for IO library functions. */
536 void gfc_trans_io_runtime_check (tree
, tree
, int, const char *, stmtblock_t
*);
537 void gfc_build_io_library_fndecls (void);
538 /* Build a function decl for a library function. */
539 tree
gfc_build_library_function_decl (tree
, tree
, int, ...);
540 tree
gfc_build_library_function_decl_with_spec (tree name
, const char *spec
,
541 tree rettype
, int nargs
, ...);
543 /* Process the local variable decls of a block construct. */
544 void gfc_process_block_locals (gfc_namespace
*);
546 /* Output initialization/clean-up code that was deferred. */
547 void gfc_trans_deferred_vars (gfc_symbol
*, gfc_wrapped_block
*);
550 tree
pushdecl (tree
);
551 tree
pushdecl_top_level (tree
);
552 void pushlevel (int);
553 tree
poplevel (int, int, int);
554 tree
getdecls (void);
555 tree
gfc_truthvalue_conversion (tree
);
556 tree
gfc_builtin_function (tree
);
558 /* In trans-types.c. */
559 struct array_descr_info
;
560 bool gfc_get_array_descr_info (const_tree
, struct array_descr_info
*);
562 /* In trans-openmp.c */
563 bool gfc_omp_privatize_by_reference (const_tree
);
564 enum omp_clause_default_kind
gfc_omp_predetermined_sharing (tree
);
565 tree
gfc_omp_report_decl (tree
);
566 tree
gfc_omp_clause_default_ctor (tree
, tree
, tree
);
567 tree
gfc_omp_clause_copy_ctor (tree
, tree
, tree
);
568 tree
gfc_omp_clause_assign_op (tree
, tree
, tree
);
569 tree
gfc_omp_clause_dtor (tree
, tree
);
570 bool gfc_omp_disregard_value_expr (tree
, bool);
571 bool gfc_omp_private_debug_clause (tree
, bool);
572 bool gfc_omp_private_outer_ref (tree
);
573 struct gimplify_omp_ctx
;
574 void gfc_omp_firstprivatize_type_sizes (struct gimplify_omp_ctx
*, tree
);
576 /* Runtime library function decls. */
577 extern GTY(()) tree gfor_fndecl_pause_numeric
;
578 extern GTY(()) tree gfor_fndecl_pause_string
;
579 extern GTY(()) tree gfor_fndecl_stop_numeric
;
580 extern GTY(()) tree gfor_fndecl_stop_string
;
581 extern GTY(()) tree gfor_fndecl_error_stop_numeric
;
582 extern GTY(()) tree gfor_fndecl_error_stop_string
;
583 extern GTY(()) tree gfor_fndecl_runtime_error
;
584 extern GTY(()) tree gfor_fndecl_runtime_error_at
;
585 extern GTY(()) tree gfor_fndecl_runtime_warning_at
;
586 extern GTY(()) tree gfor_fndecl_os_error
;
587 extern GTY(()) tree gfor_fndecl_generate_error
;
588 extern GTY(()) tree gfor_fndecl_set_fpe
;
589 extern GTY(()) tree gfor_fndecl_set_options
;
590 extern GTY(()) tree gfor_fndecl_ttynam
;
591 extern GTY(()) tree gfor_fndecl_ctime
;
592 extern GTY(()) tree gfor_fndecl_fdate
;
593 extern GTY(()) tree gfor_fndecl_in_pack
;
594 extern GTY(()) tree gfor_fndecl_in_unpack
;
595 extern GTY(()) tree gfor_fndecl_associated
;
597 /* Math functions. Many other math functions are handled in
598 trans-intrinsic.c. */
600 typedef struct GTY(()) gfc_powdecl_list
{
607 extern GTY(()) gfc_powdecl_list gfor_fndecl_math_powi
[4][3];
608 extern GTY(()) tree gfor_fndecl_math_ishftc4
;
609 extern GTY(()) tree gfor_fndecl_math_ishftc8
;
610 extern GTY(()) tree gfor_fndecl_math_ishftc16
;
612 /* BLAS functions. */
613 extern GTY(()) tree gfor_fndecl_sgemm
;
614 extern GTY(()) tree gfor_fndecl_dgemm
;
615 extern GTY(()) tree gfor_fndecl_cgemm
;
616 extern GTY(()) tree gfor_fndecl_zgemm
;
618 /* String functions. */
619 extern GTY(()) tree gfor_fndecl_compare_string
;
620 extern GTY(()) tree gfor_fndecl_concat_string
;
621 extern GTY(()) tree gfor_fndecl_string_len_trim
;
622 extern GTY(()) tree gfor_fndecl_string_index
;
623 extern GTY(()) tree gfor_fndecl_string_scan
;
624 extern GTY(()) tree gfor_fndecl_string_verify
;
625 extern GTY(()) tree gfor_fndecl_string_trim
;
626 extern GTY(()) tree gfor_fndecl_string_minmax
;
627 extern GTY(()) tree gfor_fndecl_adjustl
;
628 extern GTY(()) tree gfor_fndecl_adjustr
;
629 extern GTY(()) tree gfor_fndecl_select_string
;
630 extern GTY(()) tree gfor_fndecl_compare_string_char4
;
631 extern GTY(()) tree gfor_fndecl_concat_string_char4
;
632 extern GTY(()) tree gfor_fndecl_string_len_trim_char4
;
633 extern GTY(()) tree gfor_fndecl_string_index_char4
;
634 extern GTY(()) tree gfor_fndecl_string_scan_char4
;
635 extern GTY(()) tree gfor_fndecl_string_verify_char4
;
636 extern GTY(()) tree gfor_fndecl_string_trim_char4
;
637 extern GTY(()) tree gfor_fndecl_string_minmax_char4
;
638 extern GTY(()) tree gfor_fndecl_adjustl_char4
;
639 extern GTY(()) tree gfor_fndecl_adjustr_char4
;
640 extern GTY(()) tree gfor_fndecl_select_string_char4
;
642 /* Conversion between character kinds. */
643 extern GTY(()) tree gfor_fndecl_convert_char1_to_char4
;
644 extern GTY(()) tree gfor_fndecl_convert_char4_to_char1
;
646 /* Other misc. runtime library functions. */
647 extern GTY(()) tree gfor_fndecl_size0
;
648 extern GTY(()) tree gfor_fndecl_size1
;
649 extern GTY(()) tree gfor_fndecl_iargc
;
650 extern GTY(()) tree gfor_fndecl_clz128
;
651 extern GTY(()) tree gfor_fndecl_ctz128
;
653 /* Implemented in Fortran. */
654 extern GTY(()) tree gfor_fndecl_sc_kind
;
655 extern GTY(()) tree gfor_fndecl_si_kind
;
656 extern GTY(()) tree gfor_fndecl_sr_kind
;
659 /* True if node is an integer constant. */
660 #define INTEGER_CST_P(node) (TREE_CODE(node) == INTEGER_CST)
662 /* gfortran-specific declaration information, the _CONT versions denote
663 arrays with CONTIGUOUS attribute. */
668 GFC_ARRAY_ASSUMED_SHAPE
,
669 GFC_ARRAY_ASSUMED_SHAPE_CONT
,
670 GFC_ARRAY_ALLOCATABLE
,
672 GFC_ARRAY_POINTER_CONT
675 /* Array types only. */
676 /* FIXME: the variable_size annotation here is needed because these types are
677 variable-sized in some other frontends. Due to gengtype deficiency the GTY
678 options of such types have to agree across all frontends. */
679 struct GTY((variable_size
)) lang_type
{
681 enum gfc_array_kind akind
;
682 tree lbound
[GFC_MAX_DIMENSIONS
];
683 tree ubound
[GFC_MAX_DIMENSIONS
];
684 tree stride
[GFC_MAX_DIMENSIONS
];
693 struct GTY((variable_size
)) lang_decl
{
694 /* Dummy variables. */
695 tree saved_descriptor
;
696 /* Assigned integer nodes. Stringlength is the IO format string's length.
697 Addr is the address of the string or the target label. Stringlength is
698 initialized to -2 and assigned to -1 when addr is assigned to the
699 address of target label. */
706 #define GFC_DECL_ASSIGN_ADDR(node) DECL_LANG_SPECIFIC(node)->addr
707 #define GFC_DECL_STRING_LEN(node) DECL_LANG_SPECIFIC(node)->stringlen
708 #define GFC_DECL_SPAN(node) DECL_LANG_SPECIFIC(node)->span
709 #define GFC_DECL_SAVED_DESCRIPTOR(node) \
710 (DECL_LANG_SPECIFIC(node)->saved_descriptor)
711 #define GFC_DECL_PACKED_ARRAY(node) DECL_LANG_FLAG_0(node)
712 #define GFC_DECL_PARTIAL_PACKED_ARRAY(node) DECL_LANG_FLAG_1(node)
713 #define GFC_DECL_ASSIGN(node) DECL_LANG_FLAG_2(node)
714 #define GFC_DECL_COMMON_OR_EQUIV(node) DECL_LANG_FLAG_3(node)
715 #define GFC_DECL_CRAY_POINTEE(node) DECL_LANG_FLAG_4(node)
716 #define GFC_DECL_RESULT(node) DECL_LANG_FLAG_5(node)
717 #define GFC_DECL_SUBREF_ARRAY_P(node) DECL_LANG_FLAG_6(node)
719 /* An array descriptor. */
720 #define GFC_DESCRIPTOR_TYPE_P(node) TYPE_LANG_FLAG_1(node)
721 /* An array without a descriptor. */
722 #define GFC_ARRAY_TYPE_P(node) TYPE_LANG_FLAG_2(node)
723 /* Fortran POINTER type. */
724 #define GFC_POINTER_TYPE_P(node) TYPE_LANG_FLAG_3(node)
725 /* The GFC_TYPE_ARRAY_* members are present in both descriptor and
726 descriptorless array types. */
727 #define GFC_TYPE_ARRAY_LBOUND(node, dim) \
728 (TYPE_LANG_SPECIFIC(node)->lbound[dim])
729 #define GFC_TYPE_ARRAY_UBOUND(node, dim) \
730 (TYPE_LANG_SPECIFIC(node)->ubound[dim])
731 #define GFC_TYPE_ARRAY_STRIDE(node, dim) \
732 (TYPE_LANG_SPECIFIC(node)->stride[dim])
733 #define GFC_TYPE_ARRAY_RANK(node) (TYPE_LANG_SPECIFIC(node)->rank)
734 #define GFC_TYPE_ARRAY_SIZE(node) (TYPE_LANG_SPECIFIC(node)->size)
735 #define GFC_TYPE_ARRAY_OFFSET(node) (TYPE_LANG_SPECIFIC(node)->offset)
736 #define GFC_TYPE_ARRAY_AKIND(node) (TYPE_LANG_SPECIFIC(node)->akind)
737 /* Code should use gfc_get_dtype instead of accessing this directly. It may
738 not be known when the type is created. */
739 #define GFC_TYPE_ARRAY_DTYPE(node) (TYPE_LANG_SPECIFIC(node)->dtype)
740 #define GFC_TYPE_ARRAY_DATAPTR_TYPE(node) \
741 (TYPE_LANG_SPECIFIC(node)->dataptr_type)
742 #define GFC_TYPE_ARRAY_SPAN(node) (TYPE_LANG_SPECIFIC(node)->span)
743 #define GFC_TYPE_ARRAY_BASE_DECL(node, internal) \
744 (TYPE_LANG_SPECIFIC(node)->base_decl[(internal)])
746 /* Build an expression with void type. */
747 #define build1_v(code, arg) fold_build1(code, void_type_node, arg)
748 #define build2_v(code, arg1, arg2) fold_build2(code, void_type_node, \
750 #define build3_v(code, arg1, arg2, arg3) fold_build3(code, void_type_node, \
752 #define build4_v(code, arg1, arg2, arg3, arg4) build4(code, void_type_node, \
753 arg1, arg2, arg3, arg4)
755 /* This group of functions allows a caller to evaluate an expression from
756 the callee's interface. It establishes a mapping between the interface's
757 dummy arguments and the caller's actual arguments, then applies that
758 mapping to a given gfc_expr.
760 You can initialize a mapping structure like so:
762 gfc_interface_mapping mapping;
764 gfc_init_interface_mapping (&mapping);
766 You should then evaluate each actual argument into a temporary
767 gfc_se structure, here called "se", and map the result to the
768 dummy argument's symbol, here called "sym":
770 gfc_add_interface_mapping (&mapping, sym, &se);
772 After adding all mappings, you should call:
774 gfc_finish_interface_mapping (&mapping, pre, post);
776 where "pre" and "post" are statement blocks for initialization
777 and finalization code respectively. You can then evaluate an
778 interface expression "expr" as follows:
780 gfc_apply_interface_mapping (&mapping, se, expr);
782 Once you've evaluated all expressions, you should free
783 the mapping structure with:
785 gfc_free_interface_mapping (&mapping); */
788 /* This structure represents a mapping from OLD to NEW, where OLD is a
789 dummy argument symbol and NEW is a symbol that represents the value
790 of an actual argument. Mappings are linked together using NEXT
791 (in no particular order). */
792 typedef struct gfc_interface_sym_mapping
794 struct gfc_interface_sym_mapping
*next
;
796 gfc_symtree
*new_sym
;
799 gfc_interface_sym_mapping
;
802 /* This structure is used by callers to evaluate an expression from
803 a callee's interface. */
804 typedef struct gfc_interface_mapping
806 /* Maps the interface's dummy arguments to the values that the caller
807 is passing. The whole list is owned by this gfc_interface_mapping. */
808 gfc_interface_sym_mapping
*syms
;
810 /* A list of gfc_charlens that were needed when creating copies of
811 expressions. The whole list is owned by this gfc_interface_mapping. */
812 gfc_charlen
*charlens
;
814 gfc_interface_mapping
;
816 void gfc_init_interface_mapping (gfc_interface_mapping
*);
817 void gfc_free_interface_mapping (gfc_interface_mapping
*);
818 void gfc_add_interface_mapping (gfc_interface_mapping
*,
819 gfc_symbol
*, gfc_se
*, gfc_expr
*);
820 void gfc_finish_interface_mapping (gfc_interface_mapping
*,
821 stmtblock_t
*, stmtblock_t
*);
822 void gfc_apply_interface_mapping (gfc_interface_mapping
*,
823 gfc_se
*, gfc_expr
*);
826 /* Standard error messages used in all the trans-*.c files. */
827 extern const char gfc_msg_fault
[];
828 extern const char gfc_msg_wrong_return
[];
830 #define OMPWS_WORKSHARE_FLAG 1 /* Set if in a workshare construct. */
831 #define OMPWS_CURR_SINGLEUNIT 2 /* Set if current gfc_code in workshare
832 construct is not workshared. */
833 #define OMPWS_SCALARIZER_WS 4 /* Set if scalarizer should attempt
834 to create parallel loops. */
835 #define OMPWS_NOWAIT 8 /* Use NOWAIT on OMP_FOR. */
836 extern int ompws_flags
;
838 #endif /* GFC_TRANS_H */