1 /* Header for code translation functions 2 Copyright (C) 2002-2018 Free Software Foundation, Inc. 3 Contributed by Paul Brook 4 5 This file is part of GCC. 6 7 GCC is free software; you can redistribute it and/or modify it under 8 the terms of the GNU General Public License as published by the Free 9 Software Foundation; either version 3, or (at your option) any later 10 version. 11 12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 13 WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15 for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with GCC; see the file COPYING3. If not see 19 <http://www.gnu.org/licenses/>. */ 20 21 #ifndef GFC_TRANS_H 22 #define GFC_TRANS_H 23 24 #include "predict.h" /* For enum br_predictor and PRED_*. */ 25 26 /* Mangled symbols take the form __module__name. */ 27 #define GFC_MAX_MANGLED_SYMBOL_LEN (GFC_MAX_SYMBOL_LEN*2+4) 28 29 /* Struct for holding a block of statements. It should be treated as an 30 opaque entity and not modified directly. This allows us to change the 31 underlying representation of statement lists. */ 32 typedef struct 33 { 34 tree head; 35 unsigned int has_scope:1; 36 } 37 stmtblock_t; 38 39 /* a simplified expression */ 40 typedef struct gfc_se 41 { 42 /* Code blocks to be executed before and after using the value. */ 43 stmtblock_t pre; 44 stmtblock_t post; 45 46 /* the result of the expression */ 47 tree expr; 48 49 /* The length of a character string value. */ 50 tree string_length; 51 52 /* When expr is a reference to a class object, store its vptr access 53 here. */ 54 tree class_vptr; 55 56 /* If set gfc_conv_variable will return an expression for the array 57 descriptor. When set, want_pointer should also be set. 58 If not set scalarizing variables will be substituted. */ 59 unsigned descriptor_only:1; 60 61 /* When this is set gfc_conv_expr returns the address of a variable. Only 62 applies to EXPR_VARIABLE nodes. 63 Also used by gfc_conv_array_parameter. When set this indicates a pointer 64 to the descriptor should be returned, rather than the descriptor itself. 65 */ 66 unsigned want_pointer:1; 67 68 /* An array function call returning without a temporary. Also used for array 69 pointer assignments. */ 70 unsigned direct_byref:1; 71 72 /* If direct_byref is set, do work out the descriptor as in that case but 73 do still create a new descriptor variable instead of using an 74 existing one. This is useful for special pointer assignments like 75 rank remapping where we have to process the descriptor before 76 assigning to final one. */ 77 unsigned byref_noassign:1; 78 79 /* Ignore absent optional arguments. Used for some intrinsics. */ 80 unsigned ignore_optional:1; 81 82 /* When this is set the data and offset fields of the returned descriptor 83 are NULL. Used by intrinsic size. */ 84 unsigned data_not_needed:1; 85 86 /* If set, gfc_conv_procedure_call does not put byref calls into se->pre. */ 87 unsigned no_function_call:1; 88 89 /* If set, we will force the creation of a temporary. Useful to disable 90 non-copying procedure argument passing optimizations, when some function 91 args alias. */ 92 unsigned force_tmp:1; 93 94 /* Unconditionally calculate offset for array segments and constant 95 arrays in gfc_conv_expr_descriptor. */ 96 unsigned use_offset:1; 97 98 unsigned want_coarray:1; 99 100 /* Scalarization parameters. */ 101 struct gfc_se *parent; 102 struct gfc_ss *ss; 103 struct gfc_loopinfo *loop; 104 } 105 gfc_se; 106 107 108 /* Denotes different types of coarray. 109 Please keep in sync with libgfortran/caf/libcaf.h. */ 110 enum gfc_coarray_regtype 111 { 112 GFC_CAF_COARRAY_STATIC, 113 GFC_CAF_COARRAY_ALLOC, 114 GFC_CAF_LOCK_STATIC, 115 GFC_CAF_LOCK_ALLOC, 116 GFC_CAF_CRITICAL, 117 GFC_CAF_EVENT_STATIC, 118 GFC_CAF_EVENT_ALLOC, 119 GFC_CAF_COARRAY_ALLOC_REGISTER_ONLY, 120 GFC_CAF_COARRAY_ALLOC_ALLOCATE_ONLY 121 }; 122 123 124 /* Describes the action to take on _caf_deregister. Keep in sync with 125 gcc/fortran/trans.h. The negative values are not valid for the library and 126 are used by the drivers for building the correct call. */ 127 enum gfc_coarray_deregtype { 128 /* This is no coarray, i.e. build a call to a free (). */ 129 GFC_CAF_COARRAY_NOCOARRAY = -2, 130 /* The driver is to analyze which _caf_deregister ()-call to generate. */ 131 GFC_CAF_COARRAY_ANALYZE = -1, 132 GFC_CAF_COARRAY_DEREGISTER = 0, 133 GFC_CAF_COARRAY_DEALLOCATE_ONLY 134 }; 135 136 137 /* Specify the type of ref handed to the caf communication functions. 138 Please keep in sync with libgfortran/caf/libcaf.h. */ 139 enum gfc_caf_ref_type_t { 140 GFC_CAF_REF_COMPONENT, 141 GFC_CAF_REF_ARRAY, 142 GFC_CAF_REF_STATIC_ARRAY 143 }; 144 145 146 /* Give the reference type of an array ref. 147 Please keep in sync with libgfortran/caf/libcaf.h. */ 148 enum gfc_caf_array_ref_t { 149 GFC_CAF_ARR_REF_NONE = 0, 150 GFC_CAF_ARR_REF_VECTOR, 151 GFC_CAF_ARR_REF_FULL, 152 GFC_CAF_ARR_REF_RANGE, 153 GFC_CAF_ARR_REF_SINGLE, 154 GFC_CAF_ARR_REF_OPEN_END, 155 GFC_CAF_ARR_REF_OPEN_START 156 }; 157 158 159 /* trans-array (structure_alloc_comps) caf_mode bits. */ 160 enum gfc_structure_caf_mode_t { 161 GFC_STRUCTURE_CAF_MODE_ENABLE_COARRAY = 1 << 0, 162 GFC_STRUCTURE_CAF_MODE_IN_COARRAY = 1 << 1, 163 GFC_STRUCTURE_CAF_MODE_DEALLOC_ONLY = 1 << 2 164 }; 165 166 167 /* The array-specific scalarization information. The array members of 168 this struct are indexed by actual array index, and thus can be sparse. */ 169 170 typedef struct gfc_array_info 171 { 172 mpz_t *shape; 173 174 /* The ref that holds information on this section. */ 175 gfc_ref *ref; 176 /* The descriptor of this array. */ 177 tree descriptor; 178 /* holds the pointer to the data array. */ 179 tree data; 180 /* To move some of the array index calculation out of the innermost loop. */ 181 tree offset; 182 tree saved_offset; 183 tree stride0; 184 /* Holds the SS for a subscript. Indexed by actual dimension. */ 185 struct gfc_ss *subscript[GFC_MAX_DIMENSIONS]; 186 187 /* stride and delta are used to access this inside a scalarization loop. 188 start is used in the calculation of these. Indexed by scalarizer 189 dimension. */ 190 tree start[GFC_MAX_DIMENSIONS]; 191 tree end[GFC_MAX_DIMENSIONS]; 192 tree stride[GFC_MAX_DIMENSIONS]; 193 tree delta[GFC_MAX_DIMENSIONS]; 194 } 195 gfc_array_info; 196 197 enum gfc_ss_type 198 { 199 /* A scalar value. This will be evaluated before entering the 200 scalarization loop. */ 201 GFC_SS_SCALAR, 202 203 /* Like GFC_SS_SCALAR it evaluates the expression outside the 204 loop. Is always evaluated as a reference to the temporary, unless 205 temporary evaluation can result in a NULL pointer dereferencing (case of 206 optional arguments). Used for elemental function arguments. */ 207 GFC_SS_REFERENCE, 208 209 /* An array section. Scalarization indices will be substituted during 210 expression translation. */ 211 GFC_SS_SECTION, 212 213 /* A non-elemental function call returning an array. The call is executed 214 before entering the scalarization loop, storing the result in a 215 temporary. This temporary is then used inside the scalarization loop. 216 Simple assignments, e.g. a(:) = fn(), are handled without a temporary 217 as a special case. */ 218 GFC_SS_FUNCTION, 219 220 /* An array constructor. The current implementation is sub-optimal in 221 many cases. It allocated a temporary, assigns the values to it, then 222 uses this temporary inside the scalarization loop. */ 223 GFC_SS_CONSTRUCTOR, 224 225 /* A vector subscript. The vector's descriptor is cached in the 226 "descriptor" field of the associated gfc_ss_info. */ 227 GFC_SS_VECTOR, 228 229 /* A temporary array allocated by the scalarizer. Its rank can be less 230 than that of the assignment expression. */ 231 GFC_SS_TEMP, 232 233 /* An intrinsic function call. Many intrinsic functions which map directly 234 to library calls are created as GFC_SS_FUNCTION nodes. */ 235 GFC_SS_INTRINSIC, 236 237 /* A component of a derived type. */ 238 GFC_SS_COMPONENT 239 }; 240 241 242 typedef struct gfc_ss_info 243 { 244 int refcount; 245 gfc_ss_type type; 246 gfc_expr *expr; 247 tree string_length; 248 249 union 250 { 251 /* If type is GFC_SS_SCALAR or GFC_SS_REFERENCE. */ 252 struct 253 { 254 /* If the scalar is passed as actual argument to an (elemental) procedure, 255 this is the symbol of the corresponding dummy argument. */ 256 gfc_symbol *dummy_arg; 257 tree value; 258 /* Tells that the scalar is a reference to a variable that might 259 be present on the lhs, so that we should evaluate the value 260 itself before the loop, not just the reference. */ 261 unsigned needs_temporary:1; 262 } 263 scalar; 264 265 /* GFC_SS_TEMP. */ 266 struct 267 { 268 tree type; 269 } 270 temp; 271 272 /* All other types. */ 273 gfc_array_info array; 274 } 275 data; 276 277 /* This is used by assignments requiring temporaries. The bits specify which 278 loops the terms appear in. This will be 1 for the RHS expressions, 279 2 for the LHS expressions, and 3(=1|2) for the temporary. */ 280 unsigned useflags:2; 281 282 /* Suppresses precalculation of scalars in WHERE assignments. */ 283 unsigned where:1; 284 285 /* This set for an elemental function that contains expressions for 286 external arrays, thereby triggering creation of a temporary. */ 287 unsigned array_outer_dependency:1; 288 289 /* Tells whether the SS is for an actual argument which can be a NULL 290 reference. In other words, the associated dummy argument is OPTIONAL. 291 Used to handle elemental procedures. */ 292 bool can_be_null_ref; 293 } 294 gfc_ss_info; 295 296 #define gfc_get_ss_info() XCNEW (gfc_ss_info) 297 298 299 /* Scalarization State chain. Created by walking an expression tree before 300 creating the scalarization loops. Then passed as part of a gfc_se structure 301 to translate the expression inside the loop. Note that these chains are 302 terminated by gfc_ss_terminator, not NULL. A NULL pointer in a gfc_se 303 indicates to gfc_conv_* that this is a scalar expression. 304 SS structures can only belong to a single loopinfo. They must be added 305 otherwise they will not get freed. */ 306 307 typedef struct gfc_ss 308 { 309 gfc_ss_info *info; 310 311 int dimen; 312 /* Translation from loop dimensions to actual array dimensions. 313 actual_dim = dim[loop_dim] */ 314 int dim[GFC_MAX_DIMENSIONS]; 315 316 /* All the SS in a loop and linked through loop_chain. The SS for an 317 expression are linked by the next pointer. */ 318 struct gfc_ss *loop_chain; 319 struct gfc_ss *next; 320 321 /* Non-null if the ss is part of a nested loop. */ 322 struct gfc_ss *parent; 323 324 /* If the evaluation of an expression requires a nested loop (for example 325 if the sum intrinsic is evaluated inline), this points to the nested 326 loop's gfc_ss. */ 327 struct gfc_ss *nested_ss; 328 329 /* The loop this gfc_ss is in. */ 330 struct gfc_loopinfo *loop; 331 332 unsigned is_alloc_lhs:1; 333 unsigned no_bounds_check:1; 334 } 335 gfc_ss; 336 #define gfc_get_ss() XCNEW (gfc_ss) 337 338 /* The contents of this aren't actually used. A NULL SS chain indicates a 339 scalar expression, so this pointer is used to terminate SS chains. */ 340 extern gfc_ss * const gfc_ss_terminator; 341 342 /* Holds information about an expression while it is being scalarized. */ 343 typedef struct gfc_loopinfo 344 { 345 stmtblock_t pre; 346 stmtblock_t post; 347 348 int dimen; 349 350 /* All the SS involved with this loop. */ 351 gfc_ss *ss; 352 /* The SS describing the temporary used in an assignment. */ 353 gfc_ss *temp_ss; 354 355 /* Non-null if this loop is nested in another one. */ 356 struct gfc_loopinfo *parent; 357 358 /* Chain of nested loops. */ 359 struct gfc_loopinfo *nested, *next; 360 361 /* The scalarization loop index variables. */ 362 tree loopvar[GFC_MAX_DIMENSIONS]; 363 364 /* The bounds of the scalarization loops. */ 365 tree from[GFC_MAX_DIMENSIONS]; 366 tree to[GFC_MAX_DIMENSIONS]; 367 gfc_ss *specloop[GFC_MAX_DIMENSIONS]; 368 369 /* The code member contains the code for the body of the next outer loop. */ 370 stmtblock_t code[GFC_MAX_DIMENSIONS]; 371 372 /* Order in which the dimensions should be looped, innermost first. */ 373 int order[GFC_MAX_DIMENSIONS]; 374 375 /* Enum to control loop reversal. */ 376 gfc_reverse reverse[GFC_MAX_DIMENSIONS]; 377 378 /* The number of dimensions for which a temporary is used. */ 379 int temp_dim; 380 381 /* If set we don't need the loop variables. */ 382 unsigned array_parameter:1; 383 } 384 gfc_loopinfo; 385 386 #define gfc_get_loopinfo() XCNEW (gfc_loopinfo) 387 388 /* Information about a symbol that has been shadowed by a temporary. */ 389 typedef struct 390 { 391 symbol_attribute attr; 392 tree decl; 393 } 394 gfc_saved_var; 395 396 397 /* Store information about a block of code together with special 398 initialization and clean-up code. This can be used to incrementally add 399 init and cleanup, and in the end put everything together to a 400 try-finally expression. */ 401 typedef struct 402 { 403 tree init; 404 tree cleanup; 405 tree code; 406 } 407 gfc_wrapped_block; 408 409 /* Class API functions. */ 410 tree gfc_class_set_static_fields (tree, tree, tree); 411 tree gfc_class_data_get (tree); 412 tree gfc_class_vptr_get (tree); 413 tree gfc_class_len_get (tree); 414 tree gfc_class_len_or_zero_get (tree); 415 gfc_expr * gfc_find_and_cut_at_last_class_ref (gfc_expr *, bool is_mold = false); 416 /* Get an accessor to the class' vtab's * field, when a class handle is 417 available. */ 418 tree gfc_class_vtab_hash_get (tree); 419 tree gfc_class_vtab_size_get (tree); 420 tree gfc_class_vtab_extends_get (tree); 421 tree gfc_class_vtab_def_init_get (tree); 422 tree gfc_class_vtab_copy_get (tree); 423 tree gfc_class_vtab_final_get (tree); 424 /* Get an accessor to the vtab's * field, when a vptr handle is present. */ 425 tree gfc_vtpr_hash_get (tree); 426 tree gfc_vptr_size_get (tree); 427 tree gfc_vptr_extends_get (tree); 428 tree gfc_vptr_def_init_get (tree); 429 tree gfc_vptr_copy_get (tree); 430 tree gfc_vptr_final_get (tree); 431 tree gfc_vptr_deallocate_get (tree); 432 void gfc_reset_vptr (stmtblock_t *, gfc_expr *); 433 void gfc_reset_len (stmtblock_t *, gfc_expr *); 434 tree gfc_get_vptr_from_expr (tree); 435 tree gfc_get_class_array_ref (tree, tree, tree, bool); 436 tree gfc_copy_class_to_class (tree, tree, tree, bool); 437 bool gfc_add_finalizer_call (stmtblock_t *, gfc_expr *); 438 bool gfc_add_comp_finalizer_call (stmtblock_t *, tree, gfc_component *, bool); 439 440 void gfc_conv_derived_to_class (gfc_se *, gfc_expr *, gfc_typespec, tree, bool, 441 bool); 442 void gfc_conv_class_to_class (gfc_se *, gfc_expr *, gfc_typespec, bool, bool, 443 bool, bool); 444 445 /* Initialize an init/cleanup block. */ 446 void gfc_start_wrapped_block (gfc_wrapped_block* block, tree code); 447 /* Add a pair of init/cleanup code to the block. Each one might be a 448 NULL_TREE if not required. */ 449 void gfc_add_init_cleanup (gfc_wrapped_block* block, tree init, tree cleanup); 450 /* Finalize the block, that is, create a single expression encapsulating the 451 original code together with init and clean-up code. */ 452 tree gfc_finish_wrapped_block (gfc_wrapped_block* block); 453 454 455 /* Advance the SS chain to the next term. */ 456 void gfc_advance_se_ss_chain (gfc_se *); 457 458 /* Call this to initialize a gfc_se structure before use 459 first parameter is structure to initialize, second is 460 parent to get scalarization data from, or NULL. */ 461 void gfc_init_se (gfc_se *, gfc_se *); 462 463 /* Create an artificial variable decl and add it to the current scope. */ 464 tree gfc_create_var (tree, const char *); 465 /* Like above but doesn't add it to the current scope. */ 466 tree gfc_create_var_np (tree, const char *); 467 468 /* Store the result of an expression in a temp variable so it can be used 469 repeatedly even if the original changes */ 470 void gfc_make_safe_expr (gfc_se * se); 471 472 /* Makes sure se is suitable for passing as a function string parameter. */ 473 void gfc_conv_string_parameter (gfc_se * se); 474 475 /* Compare two strings. */ 476 tree gfc_build_compare_string (tree, tree, tree, tree, int, enum tree_code); 477 478 /* When using the gfc_conv_* make sure you understand what they do, i.e. 479 when a POST chain may be created, and what the returned expression may be 480 used for. Note that character strings have special handling. This 481 should not be a problem as most statements/operations only deal with 482 numeric/logical types. See the implementations in trans-expr.c 483 for details of the individual functions. */ 484 485 void gfc_conv_expr (gfc_se * se, gfc_expr * expr); 486 void gfc_conv_expr_val (gfc_se * se, gfc_expr * expr); 487 void gfc_conv_expr_lhs (gfc_se * se, gfc_expr * expr); 488 void gfc_conv_expr_reference (gfc_se * se, gfc_expr *); 489 void gfc_conv_expr_type (gfc_se * se, gfc_expr *, tree); 490 491 492 /* trans-expr.c */ 493 tree gfc_conv_scalar_to_descriptor (gfc_se *, tree, symbol_attribute); 494 tree gfc_get_ultimate_alloc_ptr_comps_caf_token (gfc_se *, gfc_expr *); 495 void gfc_conv_scalar_char_value (gfc_symbol *sym, gfc_se *se, gfc_expr **expr); 496 tree gfc_string_to_single_character (tree len, tree str, int kind); 497 tree gfc_get_tree_for_caf_expr (gfc_expr *); 498 void gfc_get_caf_token_offset (gfc_se*, tree *, tree *, tree, tree, gfc_expr *); 499 tree gfc_caf_get_image_index (stmtblock_t *, gfc_expr *, tree); 500 501 /* Find the decl containing the auxiliary variables for assigned variables. */ 502 void gfc_conv_label_variable (gfc_se * se, gfc_expr * expr); 503 /* If the value is not constant, Create a temporary and copy the value. */ 504 tree gfc_evaluate_now_loc (location_t, tree, stmtblock_t *); 505 tree gfc_evaluate_now (tree, stmtblock_t *); 506 507 /* Find the appropriate variant of a math intrinsic. */ 508 tree gfc_builtin_decl_for_float_kind (enum built_in_function, int); 509 510 tree size_of_string_in_bytes (int, tree); 511 512 /* Intrinsic procedure handling. */ 513 tree gfc_conv_intrinsic_subroutine (gfc_code *); 514 void gfc_conv_intrinsic_function (gfc_se *, gfc_expr *); 515 bool gfc_conv_ieee_arithmetic_function (gfc_se *, gfc_expr *); 516 tree gfc_save_fp_state (stmtblock_t *); 517 void gfc_restore_fp_state (stmtblock_t *, tree); 518 519 bool gfc_expr_is_variable (gfc_expr *); 520 521 /* Does an intrinsic map directly to an external library call 522 This is true for array-returning intrinsics, unless 523 gfc_inline_intrinsic_function_p returns true. */ 524 int gfc_is_intrinsic_libcall (gfc_expr *); 525 526 /* Used to call ordinary functions/subroutines 527 and procedure pointer components. */ 528 int gfc_conv_procedure_call (gfc_se *, gfc_symbol *, gfc_actual_arglist *, 529 gfc_expr *, vec<tree, va_gc> *); 530 531 void gfc_conv_subref_array_arg (gfc_se *, gfc_expr *, int, sym_intent, bool); 532 533 /* Generate code for a scalar assignment. */ 534 tree gfc_trans_scalar_assign (gfc_se *, gfc_se *, gfc_typespec, bool, bool, 535 bool c = false); 536 537 /* Translate COMMON blocks. */ 538 void gfc_trans_common (gfc_namespace *); 539 540 /* Translate a derived type constructor. */ 541 void gfc_conv_structure (gfc_se *, gfc_expr *, int); 542 543 /* Return an expression which determines if a dummy parameter is present. */ 544 tree gfc_conv_expr_present (gfc_symbol *); 545 /* Convert a missing, dummy argument into a null or zero. */ 546 void gfc_conv_missing_dummy (gfc_se *, gfc_expr *, gfc_typespec, int); 547 548 /* Generate code to allocate a string temporary. */ 549 tree gfc_conv_string_tmp (gfc_se *, tree, tree); 550 /* Get the string length variable belonging to an expression. */ 551 tree gfc_get_expr_charlen (gfc_expr *); 552 /* Initialize a string length variable. */ 553 void gfc_conv_string_length (gfc_charlen *, gfc_expr *, stmtblock_t *); 554 /* Ensure type sizes can be gimplified. */ 555 void gfc_trans_vla_type_sizes (gfc_symbol *, stmtblock_t *); 556 557 /* Add an expression to the end of a block. */ 558 void gfc_add_expr_to_block (stmtblock_t *, tree); 559 /* Add an expression to the beginning of a block. */ 560 void gfc_prepend_expr_to_block (stmtblock_t *, tree); 561 /* Add a block to the end of a block. */ 562 void gfc_add_block_to_block (stmtblock_t *, stmtblock_t *); 563 /* Add a MODIFY_EXPR to a block. */ 564 void gfc_add_modify_loc (location_t, stmtblock_t *, tree, tree); 565 void gfc_add_modify (stmtblock_t *, tree, tree); 566 567 /* Initialize a statement block. */ 568 void gfc_init_block (stmtblock_t *); 569 /* Start a new statement block. Like gfc_init_block but also starts a new 570 variable scope. */ 571 void gfc_start_block (stmtblock_t *); 572 /* Finish a statement block. Also closes the scope if the block was created 573 with gfc_start_block. */ 574 tree gfc_finish_block (stmtblock_t *); 575 /* Merge the scope of a block with its parent. */ 576 void gfc_merge_block_scope (stmtblock_t * block); 577 578 /* Return the backend label decl. */ 579 tree gfc_get_label_decl (gfc_st_label *); 580 581 /* Return the decl for an external function. */ 582 tree gfc_get_extern_function_decl (gfc_symbol *, 583 gfc_actual_arglist *args = NULL); 584 585 /* Return the decl for a function. */ 586 tree gfc_get_function_decl (gfc_symbol *); 587 588 /* Build an ADDR_EXPR. */ 589 tree gfc_build_addr_expr (tree, tree); 590 591 /* Build an ARRAY_REF. */ 592 tree gfc_build_array_ref (tree, tree, tree, tree vptr = NULL_TREE); 593 594 /* Creates a label. Decl is artificial if label_id == NULL_TREE. */ 595 tree gfc_build_label_decl (tree); 596 597 /* Return the decl used to hold the function return value. 598 Do not use if the function has an explicit result variable. */ 599 tree gfc_get_fake_result_decl (gfc_symbol *, int); 600 601 /* Add a decl to the binding level for the current function. */ 602 void gfc_add_decl_to_function (tree); 603 604 /* Make prototypes for runtime library functions. */ 605 void gfc_build_builtin_function_decls (void); 606 607 /* Set the backend source location of a decl. */ 608 void gfc_set_decl_location (tree, locus *); 609 610 /* Get a module symbol backend_decl if possible. */ 611 bool gfc_get_module_backend_decl (gfc_symbol *); 612 613 /* Return the variable decl for a symbol. */ 614 tree gfc_get_symbol_decl (gfc_symbol *); 615 616 /* Build a static initializer. */ 617 tree gfc_conv_initializer (gfc_expr *, gfc_typespec *, tree, bool, bool, bool); 618 619 /* Assign a default initializer to a derived type. */ 620 void gfc_init_default_dt (gfc_symbol *, stmtblock_t *, bool); 621 622 /* Substitute a temporary variable in place of the real one. */ 623 void gfc_shadow_sym (gfc_symbol *, tree, gfc_saved_var *); 624 625 /* Restore the original variable. */ 626 void gfc_restore_sym (gfc_symbol *, gfc_saved_var *); 627 628 /* Setting a decl assembler name, mangling it according to target rules 629 (like Windows @NN decorations). */ 630 void gfc_set_decl_assembler_name (tree, tree); 631 632 /* Returns true if a variable of specified size should go on the stack. */ 633 int gfc_can_put_var_on_stack (tree); 634 635 /* Set GFC_DECL_SCALAR_* on decl from sym if needed. */ 636 void gfc_finish_decl_attrs (tree, symbol_attribute *); 637 638 /* Allocate the lang-specific part of a decl node. */ 639 void gfc_allocate_lang_decl (tree); 640 641 /* Advance along a TREE_CHAIN. */ 642 tree gfc_advance_chain (tree, int); 643 644 /* Create a decl for a function. */ 645 void gfc_create_function_decl (gfc_namespace *, bool); 646 /* Generate the code for a function. */ 647 void gfc_generate_function_code (gfc_namespace *); 648 /* Output a BLOCK DATA program unit. */ 649 void gfc_generate_block_data (gfc_namespace *); 650 /* Output a decl for a module variable. */ 651 void gfc_generate_module_vars (gfc_namespace *); 652 /* Get the appropriate return statement for a procedure. */ 653 tree gfc_generate_return (void); 654 655 struct module_decl_hasher : ggc_ptr_hash<tree_node> 656 { 657 typedef const char *compare_type; 658 659 static hashval_t hash (tree); 660 static bool equal (tree, const char *); 661 }; 662 663 struct GTY((for_user)) module_htab_entry { 664 const char *name; 665 tree namespace_decl; 666 hash_table<module_decl_hasher> *GTY (()) decls; 667 }; 668 669 struct module_htab_entry *gfc_find_module (const char *); 670 void gfc_module_add_decl (struct module_htab_entry *, tree); 671 672 /* Get and set the current location. */ 673 void gfc_save_backend_locus (locus *); 674 void gfc_set_backend_locus (locus *); 675 void gfc_restore_backend_locus (locus *); 676 677 /* Handle static constructor functions. */ 678 extern GTY(()) tree gfc_static_ctors; 679 void gfc_generate_constructors (void); 680 681 /* Get the string length of an array constructor. */ 682 bool get_array_ctor_strlen (stmtblock_t *, gfc_constructor_base, tree *); 683 684 /* Mark a condition as likely or unlikely. */ 685 tree gfc_likely (tree, enum br_predictor); 686 tree gfc_unlikely (tree, enum br_predictor); 687 688 /* Return the string length of a deferred character length component. */ 689 bool gfc_deferred_strlen (gfc_component *, tree *); 690 691 /* Generate a runtime error call. */ 692 tree gfc_trans_runtime_error (bool, locus*, const char*, ...); 693 694 /* Generate a runtime warning/error check. */ 695 void gfc_trans_runtime_check (bool, bool, tree, stmtblock_t *, locus *, 696 const char *, ...); 697 698 /* Generate a runtime check for same string length. */ 699 void gfc_trans_same_strlen_check (const char*, locus*, tree, tree, 700 stmtblock_t*); 701 702 /* Generate a call to free(). */ 703 tree gfc_call_free (tree); 704 705 /* Allocate memory after performing a few checks. */ 706 tree gfc_call_malloc (stmtblock_t *, tree, tree); 707 708 /* Build a memcpy call. */ 709 tree gfc_build_memcpy_call (tree, tree, tree); 710 711 /* Register memory with the coarray library. */ 712 void gfc_allocate_using_caf_lib (stmtblock_t *, tree, tree, tree, tree, tree, 713 tree, gfc_coarray_regtype); 714 715 /* Allocate memory for allocatable variables, with optional status variable. */ 716 void gfc_allocate_allocatable (stmtblock_t*, tree, tree, tree, tree, 717 tree, tree, tree, gfc_expr*, int); 718 719 /* Allocate memory, with optional status variable. */ 720 void gfc_allocate_using_malloc (stmtblock_t *, tree, tree, tree); 721 722 /* Generate code to deallocate an array. */ 723 tree gfc_deallocate_with_status (tree, tree, tree, tree, tree, bool, 724 gfc_expr *, int, tree a = NULL_TREE, 725 tree c = NULL_TREE); 726 tree gfc_deallocate_scalar_with_status (tree, tree, tree, bool, gfc_expr*, 727 gfc_typespec, bool c = false); 728 729 /* Generate code to call realloc(). */ 730 tree gfc_call_realloc (stmtblock_t *, tree, tree); 731 732 /* Assign a derived type constructor to a variable. */ 733 tree gfc_trans_structure_assign (tree, gfc_expr *, bool, bool c = false); 734 735 /* Generate code for an assignment, includes scalarization. */ 736 tree gfc_trans_assignment (gfc_expr *, gfc_expr *, bool, bool, bool p = false, 737 bool a = true); 738 739 /* Generate code for a pointer assignment. */ 740 tree gfc_trans_pointer_assignment (gfc_expr *, gfc_expr *); 741 742 /* Initialize function decls for library functions. */ 743 void gfc_build_intrinsic_lib_fndecls (void); 744 /* Create function decls for IO library functions. */ 745 void gfc_build_io_library_fndecls (void); 746 /* Build a function decl for a library function. */ 747 tree gfc_build_library_function_decl (tree, tree, int, ...); 748 tree gfc_build_library_function_decl_with_spec (tree name, const char *spec, 749 tree rettype, int nargs, ...); 750 751 /* Process the local variable decls of a block construct. */ 752 void gfc_process_block_locals (gfc_namespace*); 753 754 /* Output initialization/clean-up code that was deferred. */ 755 void gfc_trans_deferred_vars (gfc_symbol*, gfc_wrapped_block *); 756 757 /* In f95-lang.c. */ 758 tree pushdecl (tree); 759 tree pushdecl_top_level (tree); 760 void pushlevel (void); 761 tree poplevel (int, int); 762 tree getdecls (void); 763 764 /* In trans-types.c. */ 765 struct array_descr_info; 766 bool gfc_get_array_descr_info (const_tree, struct array_descr_info *); 767 768 /* In trans-openmp.c */ 769 bool gfc_omp_privatize_by_reference (const_tree); 770 enum omp_clause_default_kind gfc_omp_predetermined_sharing (tree); 771 tree gfc_omp_report_decl (tree); 772 tree gfc_omp_clause_default_ctor (tree, tree, tree); 773 tree gfc_omp_clause_copy_ctor (tree, tree, tree); 774 tree gfc_omp_clause_assign_op (tree, tree, tree); 775 tree gfc_omp_clause_linear_ctor (tree, tree, tree, tree); 776 tree gfc_omp_clause_dtor (tree, tree); 777 void gfc_omp_finish_clause (tree, gimple_seq *); 778 bool gfc_omp_scalar_p (tree); 779 bool gfc_omp_disregard_value_expr (tree, bool); 780 bool gfc_omp_private_debug_clause (tree, bool); 781 bool gfc_omp_private_outer_ref (tree); 782 struct gimplify_omp_ctx; 783 void gfc_omp_firstprivatize_type_sizes (struct gimplify_omp_ctx *, tree); 784 785 /* Runtime library function decls. */ 786 extern GTY(()) tree gfor_fndecl_pause_numeric; 787 extern GTY(()) tree gfor_fndecl_pause_string; 788 extern GTY(()) tree gfor_fndecl_stop_numeric; 789 extern GTY(()) tree gfor_fndecl_stop_string; 790 extern GTY(()) tree gfor_fndecl_error_stop_numeric; 791 extern GTY(()) tree gfor_fndecl_error_stop_string; 792 extern GTY(()) tree gfor_fndecl_runtime_error; 793 extern GTY(()) tree gfor_fndecl_runtime_error_at; 794 extern GTY(()) tree gfor_fndecl_runtime_warning_at; 795 extern GTY(()) tree gfor_fndecl_os_error; 796 extern GTY(()) tree gfor_fndecl_generate_error; 797 extern GTY(()) tree gfor_fndecl_set_fpe; 798 extern GTY(()) tree gfor_fndecl_set_options; 799 extern GTY(()) tree gfor_fndecl_ttynam; 800 extern GTY(()) tree gfor_fndecl_ctime; 801 extern GTY(()) tree gfor_fndecl_fdate; 802 extern GTY(()) tree gfor_fndecl_in_pack; 803 extern GTY(()) tree gfor_fndecl_in_unpack; 804 extern GTY(()) tree gfor_fndecl_associated; 805 extern GTY(()) tree gfor_fndecl_system_clock4; 806 extern GTY(()) tree gfor_fndecl_system_clock8; 807 808 809 /* Coarray run-time library function decls. */ 810 extern GTY(()) tree gfor_fndecl_caf_init; 811 extern GTY(()) tree gfor_fndecl_caf_finalize; 812 extern GTY(()) tree gfor_fndecl_caf_this_image; 813 extern GTY(()) tree gfor_fndecl_caf_num_images; 814 extern GTY(()) tree gfor_fndecl_caf_register; 815 extern GTY(()) tree gfor_fndecl_caf_deregister; 816 extern GTY(()) tree gfor_fndecl_caf_get; 817 extern GTY(()) tree gfor_fndecl_caf_send; 818 extern GTY(()) tree gfor_fndecl_caf_sendget; 819 extern GTY(()) tree gfor_fndecl_caf_get_by_ref; 820 extern GTY(()) tree gfor_fndecl_caf_send_by_ref; 821 extern GTY(()) tree gfor_fndecl_caf_sendget_by_ref; 822 extern GTY(()) tree gfor_fndecl_caf_sync_all; 823 extern GTY(()) tree gfor_fndecl_caf_sync_memory; 824 extern GTY(()) tree gfor_fndecl_caf_sync_images; 825 extern GTY(()) tree gfor_fndecl_caf_stop_numeric; 826 extern GTY(()) tree gfor_fndecl_caf_stop_str; 827 extern GTY(()) tree gfor_fndecl_caf_error_stop; 828 extern GTY(()) tree gfor_fndecl_caf_error_stop_str; 829 extern GTY(()) tree gfor_fndecl_caf_atomic_def; 830 extern GTY(()) tree gfor_fndecl_caf_atomic_ref; 831 extern GTY(()) tree gfor_fndecl_caf_atomic_cas; 832 extern GTY(()) tree gfor_fndecl_caf_atomic_op; 833 extern GTY(()) tree gfor_fndecl_caf_lock; 834 extern GTY(()) tree gfor_fndecl_caf_unlock; 835 extern GTY(()) tree gfor_fndecl_caf_event_post; 836 extern GTY(()) tree gfor_fndecl_caf_event_wait; 837 extern GTY(()) tree gfor_fndecl_caf_event_query; 838 extern GTY(()) tree gfor_fndecl_caf_fail_image; 839 extern GTY(()) tree gfor_fndecl_caf_failed_images; 840 extern GTY(()) tree gfor_fndecl_caf_image_status; 841 extern GTY(()) tree gfor_fndecl_caf_stopped_images; 842 extern GTY(()) tree gfor_fndecl_caf_form_team; 843 extern GTY(()) tree gfor_fndecl_caf_change_team; 844 extern GTY(()) tree gfor_fndecl_caf_end_team; 845 extern GTY(()) tree gfor_fndecl_caf_get_team; 846 extern GTY(()) tree gfor_fndecl_caf_sync_team; 847 extern GTY(()) tree gfor_fndecl_caf_team_number; 848 extern GTY(()) tree gfor_fndecl_co_broadcast; 849 extern GTY(()) tree gfor_fndecl_co_max; 850 extern GTY(()) tree gfor_fndecl_co_min; 851 extern GTY(()) tree gfor_fndecl_co_reduce; 852 extern GTY(()) tree gfor_fndecl_co_sum; 853 extern GTY(()) tree gfor_fndecl_caf_is_present; 854 855 /* Math functions. Many other math functions are handled in 856 trans-intrinsic.c. */ 857 858 typedef struct GTY(()) gfc_powdecl_list { 859 tree integer; 860 tree real; 861 tree cmplx; 862 } 863 gfc_powdecl_list; 864 865 extern GTY(()) gfc_powdecl_list gfor_fndecl_math_powi[4][3]; 866 extern GTY(()) tree gfor_fndecl_math_ishftc4; 867 extern GTY(()) tree gfor_fndecl_math_ishftc8; 868 extern GTY(()) tree gfor_fndecl_math_ishftc16; 869 870 /* BLAS functions. */ 871 extern GTY(()) tree gfor_fndecl_sgemm; 872 extern GTY(()) tree gfor_fndecl_dgemm; 873 extern GTY(()) tree gfor_fndecl_cgemm; 874 extern GTY(()) tree gfor_fndecl_zgemm; 875 876 /* String functions. */ 877 extern GTY(()) tree gfor_fndecl_compare_string; 878 extern GTY(()) tree gfor_fndecl_concat_string; 879 extern GTY(()) tree gfor_fndecl_string_len_trim; 880 extern GTY(()) tree gfor_fndecl_string_index; 881 extern GTY(()) tree gfor_fndecl_string_scan; 882 extern GTY(()) tree gfor_fndecl_string_verify; 883 extern GTY(()) tree gfor_fndecl_string_trim; 884 extern GTY(()) tree gfor_fndecl_string_minmax; 885 extern GTY(()) tree gfor_fndecl_adjustl; 886 extern GTY(()) tree gfor_fndecl_adjustr; 887 extern GTY(()) tree gfor_fndecl_select_string; 888 extern GTY(()) tree gfor_fndecl_compare_string_char4; 889 extern GTY(()) tree gfor_fndecl_concat_string_char4; 890 extern GTY(()) tree gfor_fndecl_string_len_trim_char4; 891 extern GTY(()) tree gfor_fndecl_string_index_char4; 892 extern GTY(()) tree gfor_fndecl_string_scan_char4; 893 extern GTY(()) tree gfor_fndecl_string_verify_char4; 894 extern GTY(()) tree gfor_fndecl_string_trim_char4; 895 extern GTY(()) tree gfor_fndecl_string_minmax_char4; 896 extern GTY(()) tree gfor_fndecl_adjustl_char4; 897 extern GTY(()) tree gfor_fndecl_adjustr_char4; 898 extern GTY(()) tree gfor_fndecl_select_string_char4; 899 900 /* Conversion between character kinds. */ 901 extern GTY(()) tree gfor_fndecl_convert_char1_to_char4; 902 extern GTY(()) tree gfor_fndecl_convert_char4_to_char1; 903 904 /* Other misc. runtime library functions. */ 905 extern GTY(()) tree gfor_fndecl_size0; 906 extern GTY(()) tree gfor_fndecl_size1; 907 extern GTY(()) tree gfor_fndecl_iargc; 908 extern GTY(()) tree gfor_fndecl_kill; 909 extern GTY(()) tree gfor_fndecl_kill_sub; 910 911 /* Implemented in Fortran. */ 912 extern GTY(()) tree gfor_fndecl_sc_kind; 913 extern GTY(()) tree gfor_fndecl_si_kind; 914 extern GTY(()) tree gfor_fndecl_sr_kind; 915 916 /* IEEE-related. */ 917 extern GTY(()) tree gfor_fndecl_ieee_procedure_entry; 918 extern GTY(()) tree gfor_fndecl_ieee_procedure_exit; 919 920 921 /* True if node is an integer constant. */ 922 #define INTEGER_CST_P(node) (TREE_CODE(node) == INTEGER_CST) 923 924 /* gfortran-specific declaration information, the _CONT versions denote 925 arrays with CONTIGUOUS attribute. */ 926 927 #define GFC_DTYPE_ELEM_LEN 0 928 #define GFC_DTYPE_VERSION 1 929 #define GFC_DTYPE_RANK 2 930 #define GFC_DTYPE_TYPE 3 931 #define GFC_DTYPE_ATTRIBUTE 4 932 933 enum gfc_array_kind 934 { 935 GFC_ARRAY_UNKNOWN, 936 GFC_ARRAY_ASSUMED_SHAPE, 937 GFC_ARRAY_ASSUMED_SHAPE_CONT, 938 GFC_ARRAY_ASSUMED_RANK, 939 GFC_ARRAY_ASSUMED_RANK_CONT, 940 GFC_ARRAY_ALLOCATABLE, 941 GFC_ARRAY_POINTER, 942 GFC_ARRAY_POINTER_CONT 943 }; 944 945 /* Array types only. */ 946 struct GTY(()) lang_type { 947 int rank, corank; 948 enum gfc_array_kind akind; 949 tree lbound[GFC_MAX_DIMENSIONS]; 950 tree ubound[GFC_MAX_DIMENSIONS]; 951 tree stride[GFC_MAX_DIMENSIONS]; 952 tree size; 953 tree offset; 954 tree dtype; 955 tree dataptr_type; 956 tree span; 957 tree base_decl[2]; 958 tree nonrestricted_type; 959 tree caf_token; 960 tree caf_offset; 961 }; 962 963 struct GTY(()) lang_decl { 964 /* Dummy variables. */ 965 tree saved_descriptor; 966 /* Assigned integer nodes. Stringlength is the IO format string's length. 967 Addr is the address of the string or the target label. Stringlength is 968 initialized to -2 and assigned to -1 when addr is assigned to the 969 address of target label. */ 970 tree stringlen; 971 tree addr; 972 tree span; 973 /* For assumed-shape coarrays. */ 974 tree token, caf_offset; 975 unsigned int scalar_allocatable : 1; 976 unsigned int scalar_pointer : 1; 977 }; 978 979 980 #define GFC_DECL_ASSIGN_ADDR(node) DECL_LANG_SPECIFIC(node)->addr 981 #define GFC_DECL_STRING_LEN(node) DECL_LANG_SPECIFIC(node)->stringlen 982 #define GFC_DECL_SPAN(node) DECL_LANG_SPECIFIC(node)->span 983 #define GFC_DECL_TOKEN(node) DECL_LANG_SPECIFIC(node)->token 984 #define GFC_DECL_CAF_OFFSET(node) DECL_LANG_SPECIFIC(node)->caf_offset 985 #define GFC_DECL_SAVED_DESCRIPTOR(node) \ 986 (DECL_LANG_SPECIFIC(node)->saved_descriptor) 987 #define GFC_DECL_SCALAR_ALLOCATABLE(node) \ 988 (DECL_LANG_SPECIFIC (node)->scalar_allocatable) 989 #define GFC_DECL_SCALAR_POINTER(node) \ 990 (DECL_LANG_SPECIFIC (node)->scalar_pointer) 991 #define GFC_DECL_GET_SCALAR_ALLOCATABLE(node) \ 992 (DECL_LANG_SPECIFIC (node) ? GFC_DECL_SCALAR_ALLOCATABLE (node) : 0) 993 #define GFC_DECL_GET_SCALAR_POINTER(node) \ 994 (DECL_LANG_SPECIFIC (node) ? GFC_DECL_SCALAR_POINTER (node) : 0) 995 #define GFC_DECL_PACKED_ARRAY(node) DECL_LANG_FLAG_0(node) 996 #define GFC_DECL_PARTIAL_PACKED_ARRAY(node) DECL_LANG_FLAG_1(node) 997 #define GFC_DECL_ASSIGN(node) DECL_LANG_FLAG_2(node) 998 #define GFC_DECL_COMMON_OR_EQUIV(node) DECL_LANG_FLAG_3(node) 999 #define GFC_DECL_CRAY_POINTEE(node) DECL_LANG_FLAG_4(node) 1000 #define GFC_DECL_RESULT(node) DECL_LANG_FLAG_5(node) 1001 #define GFC_DECL_PTR_ARRAY_P(node) DECL_LANG_FLAG_6(node) 1002 #define GFC_DECL_ASSOCIATE_VAR_P(node) DECL_LANG_FLAG_7(node) 1003 #define GFC_DECL_CLASS(node) DECL_LANG_FLAG_8(node) 1004 1005 /* An array descriptor. */ 1006 #define GFC_DESCRIPTOR_TYPE_P(node) TYPE_LANG_FLAG_1(node) 1007 /* An array without a descriptor. */ 1008 #define GFC_ARRAY_TYPE_P(node) TYPE_LANG_FLAG_2(node) 1009 /* Fortran CLASS type. */ 1010 #define GFC_CLASS_TYPE_P(node) TYPE_LANG_FLAG_4(node) 1011 /* The GFC_TYPE_ARRAY_* members are present in both descriptor and 1012 descriptorless array types. */ 1013 #define GFC_TYPE_ARRAY_LBOUND(node, dim) \ 1014 (TYPE_LANG_SPECIFIC(node)->lbound[dim]) 1015 #define GFC_TYPE_ARRAY_UBOUND(node, dim) \ 1016 (TYPE_LANG_SPECIFIC(node)->ubound[dim]) 1017 #define GFC_TYPE_ARRAY_STRIDE(node, dim) \ 1018 (TYPE_LANG_SPECIFIC(node)->stride[dim]) 1019 #define GFC_TYPE_ARRAY_RANK(node) (TYPE_LANG_SPECIFIC(node)->rank) 1020 #define GFC_TYPE_ARRAY_CORANK(node) (TYPE_LANG_SPECIFIC(node)->corank) 1021 #define GFC_TYPE_ARRAY_CAF_TOKEN(node) (TYPE_LANG_SPECIFIC(node)->caf_token) 1022 #define GFC_TYPE_ARRAY_CAF_OFFSET(node) (TYPE_LANG_SPECIFIC(node)->caf_offset) 1023 #define GFC_TYPE_ARRAY_SIZE(node) (TYPE_LANG_SPECIFIC(node)->size) 1024 #define GFC_TYPE_ARRAY_OFFSET(node) (TYPE_LANG_SPECIFIC(node)->offset) 1025 #define GFC_TYPE_ARRAY_AKIND(node) (TYPE_LANG_SPECIFIC(node)->akind) 1026 /* Code should use gfc_get_dtype instead of accessing this directly. It may 1027 not be known when the type is created. */ 1028 #define GFC_TYPE_ARRAY_DTYPE(node) (TYPE_LANG_SPECIFIC(node)->dtype) 1029 #define GFC_TYPE_ARRAY_DATAPTR_TYPE(node) \ 1030 (TYPE_LANG_SPECIFIC(node)->dataptr_type) 1031 #define GFC_TYPE_ARRAY_SPAN(node) (TYPE_LANG_SPECIFIC(node)->span) 1032 #define GFC_TYPE_ARRAY_BASE_DECL(node, internal) \ 1033 (TYPE_LANG_SPECIFIC(node)->base_decl[(internal)]) 1034 1035 1036 /* Build an expression with void type. */ 1037 #define build1_v(code, arg) \ 1038 fold_build1_loc (input_location, code, void_type_node, arg) 1039 #define build2_v(code, arg1, arg2) \ 1040 fold_build2_loc (input_location, code, void_type_node, arg1, arg2) 1041 #define build3_v(code, arg1, arg2, arg3) \ 1042 fold_build3_loc (input_location, code, void_type_node, arg1, arg2, arg3) 1043 #define build4_v(code, arg1, arg2, arg3, arg4) \ 1044 build4_loc (input_location, code, void_type_node, arg1, arg2, \ 1045 arg3, arg4) 1046 1047 /* This group of functions allows a caller to evaluate an expression from 1048 the callee's interface. It establishes a mapping between the interface's 1049 dummy arguments and the caller's actual arguments, then applies that 1050 mapping to a given gfc_expr. 1051 1052 You can initialize a mapping structure like so: 1053 1054 gfc_interface_mapping mapping; 1055 ... 1056 gfc_init_interface_mapping (&mapping); 1057 1058 You should then evaluate each actual argument into a temporary 1059 gfc_se structure, here called "se", and map the result to the 1060 dummy argument's symbol, here called "sym": 1061 1062 gfc_add_interface_mapping (&mapping, sym, &se); 1063 1064 After adding all mappings, you should call: 1065 1066 gfc_finish_interface_mapping (&mapping, pre, post); 1067 1068 where "pre" and "post" are statement blocks for initialization 1069 and finalization code respectively. You can then evaluate an 1070 interface expression "expr" as follows: 1071 1072 gfc_apply_interface_mapping (&mapping, se, expr); 1073 1074 Once you've evaluated all expressions, you should free 1075 the mapping structure with: 1076 1077 gfc_free_interface_mapping (&mapping); */ 1078 1079 1080 /* This structure represents a mapping from OLD to NEW, where OLD is a 1081 dummy argument symbol and NEW is a symbol that represents the value 1082 of an actual argument. Mappings are linked together using NEXT 1083 (in no particular order). */ 1084 typedef struct gfc_interface_sym_mapping 1085 { 1086 struct gfc_interface_sym_mapping *next; 1087 gfc_symbol *old; 1088 gfc_symtree *new_sym; 1089 gfc_expr *expr; 1090 } 1091 gfc_interface_sym_mapping; 1092 1093 1094 /* This structure is used by callers to evaluate an expression from 1095 a callee's interface. */ 1096 typedef struct gfc_interface_mapping 1097 { 1098 /* Maps the interface's dummy arguments to the values that the caller 1099 is passing. The whole list is owned by this gfc_interface_mapping. */ 1100 gfc_interface_sym_mapping *syms; 1101 1102 /* A list of gfc_charlens that were needed when creating copies of 1103 expressions. The whole list is owned by this gfc_interface_mapping. */ 1104 gfc_charlen *charlens; 1105 } 1106 gfc_interface_mapping; 1107 1108 void gfc_init_interface_mapping (gfc_interface_mapping *); 1109 void gfc_free_interface_mapping (gfc_interface_mapping *); 1110 void gfc_add_interface_mapping (gfc_interface_mapping *, 1111 gfc_symbol *, gfc_se *, gfc_expr *); 1112 void gfc_finish_interface_mapping (gfc_interface_mapping *, 1113 stmtblock_t *, stmtblock_t *); 1114 void gfc_apply_interface_mapping (gfc_interface_mapping *, 1115 gfc_se *, gfc_expr *); 1116 1117 1118 /* Standard error messages used in all the trans-*.c files. */ 1119 extern const char gfc_msg_fault[]; 1120 extern const char gfc_msg_wrong_return[]; 1121 1122 #define OMPWS_WORKSHARE_FLAG 1 /* Set if in a workshare construct. */ 1123 #define OMPWS_CURR_SINGLEUNIT 2 /* Set if current gfc_code in workshare 1124 construct is not workshared. */ 1125 #define OMPWS_SCALARIZER_WS 4 /* Set if scalarizer should attempt 1126 to create parallel loops. */ 1127 #define OMPWS_SCALARIZER_BODY 8 /* Set if handling body of potential 1128 parallel loop. */ 1129 #define OMPWS_NOWAIT 16 /* Use NOWAIT on OMP_FOR. */ 1130 extern int ompws_flags; 1131 1132 #endif /* GFC_TRANS_H */ 1133