1 /* Header for code translation functions 2 Copyright (C) 2002-2019 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 /* If set, will pass subref descriptors without a temporary. */ 95 unsigned force_no_tmp:1; 96 97 /* Unconditionally calculate offset for array segments and constant 98 arrays in gfc_conv_expr_descriptor. */ 99 unsigned use_offset:1; 100 101 unsigned want_coarray:1; 102 103 /* Scalarization parameters. */ 104 struct gfc_se *parent; 105 struct gfc_ss *ss; 106 struct gfc_loopinfo *loop; 107 } 108 gfc_se; 109 110 111 /* Denotes different types of coarray. 112 Please keep in sync with libgfortran/caf/libcaf.h. */ 113 enum gfc_coarray_regtype 114 { 115 GFC_CAF_COARRAY_STATIC, 116 GFC_CAF_COARRAY_ALLOC, 117 GFC_CAF_LOCK_STATIC, 118 GFC_CAF_LOCK_ALLOC, 119 GFC_CAF_CRITICAL, 120 GFC_CAF_EVENT_STATIC, 121 GFC_CAF_EVENT_ALLOC, 122 GFC_CAF_COARRAY_ALLOC_REGISTER_ONLY, 123 GFC_CAF_COARRAY_ALLOC_ALLOCATE_ONLY 124 }; 125 126 127 /* Describes the action to take on _caf_deregister. Keep in sync with 128 gcc/fortran/trans.h. The negative values are not valid for the library and 129 are used by the drivers for building the correct call. */ 130 enum gfc_coarray_deregtype { 131 /* This is no coarray, i.e. build a call to a free (). */ 132 GFC_CAF_COARRAY_NOCOARRAY = -2, 133 /* The driver is to analyze which _caf_deregister ()-call to generate. */ 134 GFC_CAF_COARRAY_ANALYZE = -1, 135 GFC_CAF_COARRAY_DEREGISTER = 0, 136 GFC_CAF_COARRAY_DEALLOCATE_ONLY 137 }; 138 139 140 /* Specify the type of ref handed to the caf communication functions. 141 Please keep in sync with libgfortran/caf/libcaf.h. */ 142 enum gfc_caf_ref_type_t { 143 GFC_CAF_REF_COMPONENT, 144 GFC_CAF_REF_ARRAY, 145 GFC_CAF_REF_STATIC_ARRAY 146 }; 147 148 149 /* Give the reference type of an array ref. 150 Please keep in sync with libgfortran/caf/libcaf.h. */ 151 enum gfc_caf_array_ref_t { 152 GFC_CAF_ARR_REF_NONE = 0, 153 GFC_CAF_ARR_REF_VECTOR, 154 GFC_CAF_ARR_REF_FULL, 155 GFC_CAF_ARR_REF_RANGE, 156 GFC_CAF_ARR_REF_SINGLE, 157 GFC_CAF_ARR_REF_OPEN_END, 158 GFC_CAF_ARR_REF_OPEN_START 159 }; 160 161 162 /* trans-array (structure_alloc_comps) caf_mode bits. */ 163 enum gfc_structure_caf_mode_t { 164 GFC_STRUCTURE_CAF_MODE_ENABLE_COARRAY = 1 << 0, 165 GFC_STRUCTURE_CAF_MODE_IN_COARRAY = 1 << 1, 166 GFC_STRUCTURE_CAF_MODE_DEALLOC_ONLY = 1 << 2 167 }; 168 169 170 /* The array-specific scalarization information. The array members of 171 this struct are indexed by actual array index, and thus can be sparse. */ 172 173 typedef struct gfc_array_info 174 { 175 mpz_t *shape; 176 177 /* The ref that holds information on this section. */ 178 gfc_ref *ref; 179 /* The descriptor of this array. */ 180 tree descriptor; 181 /* holds the pointer to the data array. */ 182 tree data; 183 /* To move some of the array index calculation out of the innermost loop. */ 184 tree offset; 185 tree saved_offset; 186 tree stride0; 187 /* Holds the SS for a subscript. Indexed by actual dimension. */ 188 struct gfc_ss *subscript[GFC_MAX_DIMENSIONS]; 189 190 /* stride and delta are used to access this inside a scalarization loop. 191 start is used in the calculation of these. Indexed by scalarizer 192 dimension. */ 193 tree start[GFC_MAX_DIMENSIONS]; 194 tree end[GFC_MAX_DIMENSIONS]; 195 tree stride[GFC_MAX_DIMENSIONS]; 196 tree delta[GFC_MAX_DIMENSIONS]; 197 } 198 gfc_array_info; 199 200 enum gfc_ss_type 201 { 202 /* A scalar value. This will be evaluated before entering the 203 scalarization loop. */ 204 GFC_SS_SCALAR, 205 206 /* Like GFC_SS_SCALAR it evaluates the expression outside the 207 loop. Is always evaluated as a reference to the temporary, unless 208 temporary evaluation can result in a NULL pointer dereferencing (case of 209 optional arguments). Used for elemental function arguments. */ 210 GFC_SS_REFERENCE, 211 212 /* An array section. Scalarization indices will be substituted during 213 expression translation. */ 214 GFC_SS_SECTION, 215 216 /* A non-elemental function call returning an array. The call is executed 217 before entering the scalarization loop, storing the result in a 218 temporary. This temporary is then used inside the scalarization loop. 219 Simple assignments, e.g. a(:) = fn(), are handled without a temporary 220 as a special case. */ 221 GFC_SS_FUNCTION, 222 223 /* An array constructor. The current implementation is sub-optimal in 224 many cases. It allocated a temporary, assigns the values to it, then 225 uses this temporary inside the scalarization loop. */ 226 GFC_SS_CONSTRUCTOR, 227 228 /* A vector subscript. The vector's descriptor is cached in the 229 "descriptor" field of the associated gfc_ss_info. */ 230 GFC_SS_VECTOR, 231 232 /* A temporary array allocated by the scalarizer. Its rank can be less 233 than that of the assignment expression. */ 234 GFC_SS_TEMP, 235 236 /* An intrinsic function call. Many intrinsic functions which map directly 237 to library calls are created as GFC_SS_FUNCTION nodes. */ 238 GFC_SS_INTRINSIC, 239 240 /* A component of a derived type. */ 241 GFC_SS_COMPONENT 242 }; 243 244 245 typedef struct gfc_ss_info 246 { 247 int refcount; 248 gfc_ss_type type; 249 gfc_expr *expr; 250 tree string_length; 251 252 union 253 { 254 /* If type is GFC_SS_SCALAR or GFC_SS_REFERENCE. */ 255 struct 256 { 257 /* If the scalar is passed as actual argument to an (elemental) procedure, 258 this is the symbol of the corresponding dummy argument. */ 259 gfc_symbol *dummy_arg; 260 tree value; 261 /* Tells that the scalar is a reference to a variable that might 262 be present on the lhs, so that we should evaluate the value 263 itself before the loop, not just the reference. */ 264 unsigned needs_temporary:1; 265 } 266 scalar; 267 268 /* GFC_SS_TEMP. */ 269 struct 270 { 271 tree type; 272 } 273 temp; 274 275 /* All other types. */ 276 gfc_array_info array; 277 } 278 data; 279 280 /* This is used by assignments requiring temporaries. The bits specify which 281 loops the terms appear in. This will be 1 for the RHS expressions, 282 2 for the LHS expressions, and 3(=1|2) for the temporary. */ 283 unsigned useflags:2; 284 285 /* Suppresses precalculation of scalars in WHERE assignments. */ 286 unsigned where:1; 287 288 /* This set for an elemental function that contains expressions for 289 external arrays, thereby triggering creation of a temporary. */ 290 unsigned array_outer_dependency:1; 291 292 /* Tells whether the SS is for an actual argument which can be a NULL 293 reference. In other words, the associated dummy argument is OPTIONAL. 294 Used to handle elemental procedures. */ 295 bool can_be_null_ref; 296 } 297 gfc_ss_info; 298 299 #define gfc_get_ss_info() XCNEW (gfc_ss_info) 300 301 302 /* Scalarization State chain. Created by walking an expression tree before 303 creating the scalarization loops. Then passed as part of a gfc_se structure 304 to translate the expression inside the loop. Note that these chains are 305 terminated by gfc_ss_terminator, not NULL. A NULL pointer in a gfc_se 306 indicates to gfc_conv_* that this is a scalar expression. 307 SS structures can only belong to a single loopinfo. They must be added 308 otherwise they will not get freed. */ 309 310 typedef struct gfc_ss 311 { 312 gfc_ss_info *info; 313 314 int dimen; 315 /* Translation from loop dimensions to actual array dimensions. 316 actual_dim = dim[loop_dim] */ 317 int dim[GFC_MAX_DIMENSIONS]; 318 319 /* All the SS in a loop and linked through loop_chain. The SS for an 320 expression are linked by the next pointer. */ 321 struct gfc_ss *loop_chain; 322 struct gfc_ss *next; 323 324 /* Non-null if the ss is part of a nested loop. */ 325 struct gfc_ss *parent; 326 327 /* If the evaluation of an expression requires a nested loop (for example 328 if the sum intrinsic is evaluated inline), this points to the nested 329 loop's gfc_ss. */ 330 struct gfc_ss *nested_ss; 331 332 /* The loop this gfc_ss is in. */ 333 struct gfc_loopinfo *loop; 334 335 unsigned is_alloc_lhs:1; 336 unsigned no_bounds_check:1; 337 } 338 gfc_ss; 339 #define gfc_get_ss() XCNEW (gfc_ss) 340 341 /* The contents of this aren't actually used. A NULL SS chain indicates a 342 scalar expression, so this pointer is used to terminate SS chains. */ 343 extern gfc_ss * const gfc_ss_terminator; 344 345 /* Holds information about an expression while it is being scalarized. */ 346 typedef struct gfc_loopinfo 347 { 348 stmtblock_t pre; 349 stmtblock_t post; 350 351 int dimen; 352 353 /* All the SS involved with this loop. */ 354 gfc_ss *ss; 355 /* The SS describing the temporary used in an assignment. */ 356 gfc_ss *temp_ss; 357 358 /* Non-null if this loop is nested in another one. */ 359 struct gfc_loopinfo *parent; 360 361 /* Chain of nested loops. */ 362 struct gfc_loopinfo *nested, *next; 363 364 /* The scalarization loop index variables. */ 365 tree loopvar[GFC_MAX_DIMENSIONS]; 366 367 /* The bounds of the scalarization loops. */ 368 tree from[GFC_MAX_DIMENSIONS]; 369 tree to[GFC_MAX_DIMENSIONS]; 370 gfc_ss *specloop[GFC_MAX_DIMENSIONS]; 371 372 /* The code member contains the code for the body of the next outer loop. */ 373 stmtblock_t code[GFC_MAX_DIMENSIONS]; 374 375 /* Order in which the dimensions should be looped, innermost first. */ 376 int order[GFC_MAX_DIMENSIONS]; 377 378 /* Enum to control loop reversal. */ 379 gfc_reverse reverse[GFC_MAX_DIMENSIONS]; 380 381 /* The number of dimensions for which a temporary is used. */ 382 int temp_dim; 383 384 /* If set we don't need the loop variables. */ 385 unsigned array_parameter:1; 386 } 387 gfc_loopinfo; 388 389 #define gfc_get_loopinfo() XCNEW (gfc_loopinfo) 390 391 /* Information about a symbol that has been shadowed by a temporary. */ 392 typedef struct 393 { 394 symbol_attribute attr; 395 tree decl; 396 } 397 gfc_saved_var; 398 399 400 /* Store information about a block of code together with special 401 initialization and clean-up code. This can be used to incrementally add 402 init and cleanup, and in the end put everything together to a 403 try-finally expression. */ 404 typedef struct 405 { 406 tree init; 407 tree cleanup; 408 tree code; 409 } 410 gfc_wrapped_block; 411 412 /* Class API functions. */ 413 tree gfc_class_set_static_fields (tree, tree, tree); 414 tree gfc_class_data_get (tree); 415 tree gfc_class_vptr_get (tree); 416 tree gfc_class_len_get (tree); 417 tree gfc_class_len_or_zero_get (tree); 418 gfc_expr * gfc_find_and_cut_at_last_class_ref (gfc_expr *, bool is_mold = false); 419 /* Get an accessor to the class' vtab's * field, when a class handle is 420 available. */ 421 tree gfc_class_vtab_hash_get (tree); 422 tree gfc_class_vtab_size_get (tree); 423 tree gfc_class_vtab_extends_get (tree); 424 tree gfc_class_vtab_def_init_get (tree); 425 tree gfc_class_vtab_copy_get (tree); 426 tree gfc_class_vtab_final_get (tree); 427 /* Get an accessor to the vtab's * field, when a vptr handle is present. */ 428 tree gfc_vtpr_hash_get (tree); 429 tree gfc_vptr_size_get (tree); 430 tree gfc_vptr_extends_get (tree); 431 tree gfc_vptr_def_init_get (tree); 432 tree gfc_vptr_copy_get (tree); 433 tree gfc_vptr_final_get (tree); 434 tree gfc_vptr_deallocate_get (tree); 435 void gfc_reset_vptr (stmtblock_t *, gfc_expr *); 436 void gfc_reset_len (stmtblock_t *, gfc_expr *); 437 tree gfc_get_vptr_from_expr (tree); 438 tree gfc_get_class_array_ref (tree, tree, tree, bool); 439 tree gfc_copy_class_to_class (tree, tree, tree, bool); 440 bool gfc_add_finalizer_call (stmtblock_t *, gfc_expr *); 441 bool gfc_add_comp_finalizer_call (stmtblock_t *, tree, gfc_component *, bool); 442 443 void gfc_conv_derived_to_class (gfc_se *, gfc_expr *, gfc_typespec, tree, bool, 444 bool); 445 void gfc_conv_class_to_class (gfc_se *, gfc_expr *, gfc_typespec, bool, bool, 446 bool, bool); 447 448 /* Initialize an init/cleanup block. */ 449 void gfc_start_wrapped_block (gfc_wrapped_block* block, tree code); 450 /* Add a pair of init/cleanup code to the block. Each one might be a 451 NULL_TREE if not required. */ 452 void gfc_add_init_cleanup (gfc_wrapped_block* block, tree init, tree cleanup); 453 /* Finalize the block, that is, create a single expression encapsulating the 454 original code together with init and clean-up code. */ 455 tree gfc_finish_wrapped_block (gfc_wrapped_block* block); 456 457 458 /* Advance the SS chain to the next term. */ 459 void gfc_advance_se_ss_chain (gfc_se *); 460 461 /* Call this to initialize a gfc_se structure before use 462 first parameter is structure to initialize, second is 463 parent to get scalarization data from, or NULL. */ 464 void gfc_init_se (gfc_se *, gfc_se *); 465 466 /* Create an artificial variable decl and add it to the current scope. */ 467 tree gfc_create_var (tree, const char *); 468 /* Like above but doesn't add it to the current scope. */ 469 tree gfc_create_var_np (tree, const char *); 470 471 /* Store the result of an expression in a temp variable so it can be used 472 repeatedly even if the original changes */ 473 void gfc_make_safe_expr (gfc_se * se); 474 475 /* Makes sure se is suitable for passing as a function string parameter. */ 476 void gfc_conv_string_parameter (gfc_se * se); 477 478 /* Compare two strings. */ 479 tree gfc_build_compare_string (tree, tree, tree, tree, int, enum tree_code); 480 481 /* When using the gfc_conv_* make sure you understand what they do, i.e. 482 when a POST chain may be created, and what the returned expression may be 483 used for. Note that character strings have special handling. This 484 should not be a problem as most statements/operations only deal with 485 numeric/logical types. See the implementations in trans-expr.c 486 for details of the individual functions. */ 487 488 void gfc_conv_expr (gfc_se * se, gfc_expr * expr); 489 void gfc_conv_expr_val (gfc_se * se, gfc_expr * expr); 490 void gfc_conv_expr_lhs (gfc_se * se, gfc_expr * expr); 491 void gfc_conv_expr_reference (gfc_se * se, gfc_expr * expr, 492 bool add_clobber = false); 493 void gfc_conv_expr_type (gfc_se * se, gfc_expr *, tree); 494 495 496 /* trans-expr.c */ 497 tree gfc_conv_scalar_to_descriptor (gfc_se *, tree, symbol_attribute); 498 tree gfc_get_ultimate_alloc_ptr_comps_caf_token (gfc_se *, gfc_expr *); 499 void gfc_conv_scalar_char_value (gfc_symbol *sym, gfc_se *se, gfc_expr **expr); 500 tree gfc_string_to_single_character (tree len, tree str, int kind); 501 tree gfc_get_tree_for_caf_expr (gfc_expr *); 502 void gfc_get_caf_token_offset (gfc_se*, tree *, tree *, tree, tree, gfc_expr *); 503 tree gfc_caf_get_image_index (stmtblock_t *, gfc_expr *, tree); 504 505 /* Find the decl containing the auxiliary variables for assigned variables. */ 506 void gfc_conv_label_variable (gfc_se * se, gfc_expr * expr); 507 /* If the value is not constant, Create a temporary and copy the value. */ 508 tree gfc_evaluate_now_loc (location_t, tree, stmtblock_t *); 509 tree gfc_evaluate_now (tree, stmtblock_t *); 510 tree gfc_evaluate_now_function_scope (tree, stmtblock_t *); 511 512 /* Find the appropriate variant of a math intrinsic. */ 513 tree gfc_builtin_decl_for_float_kind (enum built_in_function, int); 514 515 tree size_of_string_in_bytes (int, tree); 516 517 /* Intrinsic procedure handling. */ 518 tree gfc_conv_intrinsic_subroutine (gfc_code *); 519 void gfc_conv_intrinsic_function (gfc_se *, gfc_expr *); 520 bool gfc_conv_ieee_arithmetic_function (gfc_se *, gfc_expr *); 521 tree gfc_save_fp_state (stmtblock_t *); 522 void gfc_restore_fp_state (stmtblock_t *, tree); 523 524 bool gfc_expr_is_variable (gfc_expr *); 525 526 /* Does an intrinsic map directly to an external library call 527 This is true for array-returning intrinsics, unless 528 gfc_inline_intrinsic_function_p returns true. */ 529 int gfc_is_intrinsic_libcall (gfc_expr *); 530 531 /* Used to call ordinary functions/subroutines 532 and procedure pointer components. */ 533 int gfc_conv_procedure_call (gfc_se *, gfc_symbol *, gfc_actual_arglist *, 534 gfc_expr *, vec<tree, va_gc> *); 535 536 void gfc_conv_subref_array_arg (gfc_se *, gfc_expr *, int, sym_intent, bool); 537 538 /* Generate code for a scalar assignment. */ 539 tree gfc_trans_scalar_assign (gfc_se *, gfc_se *, gfc_typespec, bool, bool, 540 bool c = false); 541 542 /* Translate COMMON blocks. */ 543 void gfc_trans_common (gfc_namespace *); 544 545 /* Translate a derived type constructor. */ 546 void gfc_conv_structure (gfc_se *, gfc_expr *, int); 547 548 /* Return an expression which determines if a dummy parameter is present. */ 549 tree gfc_conv_expr_present (gfc_symbol *); 550 /* Convert a missing, dummy argument into a null or zero. */ 551 void gfc_conv_missing_dummy (gfc_se *, gfc_expr *, gfc_typespec, int); 552 553 /* Generate code to allocate a string temporary. */ 554 tree gfc_conv_string_tmp (gfc_se *, tree, tree); 555 /* Get the string length variable belonging to an expression. */ 556 tree gfc_get_expr_charlen (gfc_expr *); 557 /* Initialize a string length variable. */ 558 void gfc_conv_string_length (gfc_charlen *, gfc_expr *, stmtblock_t *); 559 /* Ensure type sizes can be gimplified. */ 560 void gfc_trans_vla_type_sizes (gfc_symbol *, stmtblock_t *); 561 562 /* Add an expression to the end of a block. */ 563 void gfc_add_expr_to_block (stmtblock_t *, tree); 564 /* Add an expression to the beginning of a block. */ 565 void gfc_prepend_expr_to_block (stmtblock_t *, tree); 566 /* Add a block to the end of a block. */ 567 void gfc_add_block_to_block (stmtblock_t *, stmtblock_t *); 568 /* Add a MODIFY_EXPR to a block. */ 569 void gfc_add_modify_loc (location_t, stmtblock_t *, tree, tree); 570 void gfc_add_modify (stmtblock_t *, tree, tree); 571 572 /* Initialize a statement block. */ 573 void gfc_init_block (stmtblock_t *); 574 /* Start a new statement block. Like gfc_init_block but also starts a new 575 variable scope. */ 576 void gfc_start_block (stmtblock_t *); 577 /* Finish a statement block. Also closes the scope if the block was created 578 with gfc_start_block. */ 579 tree gfc_finish_block (stmtblock_t *); 580 /* Merge the scope of a block with its parent. */ 581 void gfc_merge_block_scope (stmtblock_t * block); 582 583 /* Return the backend label decl. */ 584 tree gfc_get_label_decl (gfc_st_label *); 585 586 /* Return the decl for an external function. */ 587 tree gfc_get_extern_function_decl (gfc_symbol *, 588 gfc_actual_arglist *args = NULL); 589 590 /* Return the decl for a function. */ 591 tree gfc_get_function_decl (gfc_symbol *); 592 593 /* Build an ADDR_EXPR. */ 594 tree gfc_build_addr_expr (tree, tree); 595 596 /* Build an ARRAY_REF. */ 597 tree gfc_build_array_ref (tree, tree, tree, tree vptr = NULL_TREE); 598 599 /* Creates a label. Decl is artificial if label_id == NULL_TREE. */ 600 tree gfc_build_label_decl (tree); 601 602 /* Return the decl used to hold the function return value. 603 Do not use if the function has an explicit result variable. */ 604 tree gfc_get_fake_result_decl (gfc_symbol *, int); 605 606 /* Add a decl to the binding level for the current function. */ 607 void gfc_add_decl_to_function (tree); 608 609 /* Make prototypes for runtime library functions. */ 610 void gfc_build_builtin_function_decls (void); 611 612 /* Set the backend source location of a decl. */ 613 void gfc_set_decl_location (tree, locus *); 614 615 /* Get a module symbol backend_decl if possible. */ 616 bool gfc_get_module_backend_decl (gfc_symbol *); 617 618 /* Return the variable decl for a symbol. */ 619 tree gfc_get_symbol_decl (gfc_symbol *); 620 621 /* Build a static initializer. */ 622 tree gfc_conv_initializer (gfc_expr *, gfc_typespec *, tree, bool, bool, bool); 623 624 /* Assign a default initializer to a derived type. */ 625 void gfc_init_default_dt (gfc_symbol *, stmtblock_t *, bool); 626 627 /* Substitute a temporary variable in place of the real one. */ 628 void gfc_shadow_sym (gfc_symbol *, tree, gfc_saved_var *); 629 630 /* Restore the original variable. */ 631 void gfc_restore_sym (gfc_symbol *, gfc_saved_var *); 632 633 /* Setting a decl assembler name, mangling it according to target rules 634 (like Windows @NN decorations). */ 635 void gfc_set_decl_assembler_name (tree, tree); 636 637 /* Returns true if a variable of specified size should go on the stack. */ 638 int gfc_can_put_var_on_stack (tree); 639 640 /* Set GFC_DECL_SCALAR_* on decl from sym if needed. */ 641 void gfc_finish_decl_attrs (tree, symbol_attribute *); 642 643 /* Allocate the lang-specific part of a decl node. */ 644 void gfc_allocate_lang_decl (tree); 645 646 /* Advance along a TREE_CHAIN. */ 647 tree gfc_advance_chain (tree, int); 648 649 /* Create a decl for a function. */ 650 void gfc_create_function_decl (gfc_namespace *, bool); 651 /* Generate the code for a function. */ 652 void gfc_generate_function_code (gfc_namespace *); 653 /* Output a BLOCK DATA program unit. */ 654 void gfc_generate_block_data (gfc_namespace *); 655 /* Output a decl for a module variable. */ 656 void gfc_generate_module_vars (gfc_namespace *); 657 /* Get the appropriate return statement for a procedure. */ 658 tree gfc_generate_return (void); 659 660 struct module_decl_hasher : ggc_ptr_hash<tree_node> 661 { 662 typedef const char *compare_type; 663 664 static hashval_t hash (tree); 665 static bool equal (tree, const char *); 666 }; 667 668 struct GTY((for_user)) module_htab_entry { 669 const char *name; 670 tree namespace_decl; 671 hash_table<module_decl_hasher> *GTY (()) decls; 672 }; 673 674 struct module_htab_entry *gfc_find_module (const char *); 675 void gfc_module_add_decl (struct module_htab_entry *, tree); 676 677 /* Get and set the current location. */ 678 void gfc_save_backend_locus (locus *); 679 void gfc_set_backend_locus (locus *); 680 void gfc_restore_backend_locus (locus *); 681 682 /* Handle static constructor functions. */ 683 extern GTY(()) tree gfc_static_ctors; 684 void gfc_generate_constructors (void); 685 686 /* Get the string length of an array constructor. */ 687 bool get_array_ctor_strlen (stmtblock_t *, gfc_constructor_base, tree *); 688 689 /* Mark a condition as likely or unlikely. */ 690 tree gfc_likely (tree, enum br_predictor); 691 tree gfc_unlikely (tree, enum br_predictor); 692 693 /* Return the string length of a deferred character length component. */ 694 bool gfc_deferred_strlen (gfc_component *, tree *); 695 696 /* Generate a runtime error call. */ 697 tree gfc_trans_runtime_error (bool, locus*, const char*, ...); 698 699 /* Generate a runtime warning/error check. */ 700 void gfc_trans_runtime_check (bool, bool, tree, stmtblock_t *, locus *, 701 const char *, ...); 702 703 /* Generate a runtime check for same string length. */ 704 void gfc_trans_same_strlen_check (const char*, locus*, tree, tree, 705 stmtblock_t*); 706 707 /* Generate a call to free(). */ 708 tree gfc_call_free (tree); 709 710 /* Allocate memory after performing a few checks. */ 711 tree gfc_call_malloc (stmtblock_t *, tree, tree); 712 713 /* Build a memcpy call. */ 714 tree gfc_build_memcpy_call (tree, tree, tree); 715 716 /* Register memory with the coarray library. */ 717 void gfc_allocate_using_caf_lib (stmtblock_t *, tree, tree, tree, tree, tree, 718 tree, gfc_coarray_regtype); 719 720 /* Allocate memory for allocatable variables, with optional status variable. */ 721 void gfc_allocate_allocatable (stmtblock_t*, tree, tree, tree, tree, 722 tree, tree, tree, gfc_expr*, int); 723 724 /* Allocate memory, with optional status variable. */ 725 void gfc_allocate_using_malloc (stmtblock_t *, tree, tree, tree); 726 727 /* Generate code to deallocate an array. */ 728 tree gfc_deallocate_with_status (tree, tree, tree, tree, tree, bool, 729 gfc_expr *, int, tree a = NULL_TREE, 730 tree c = NULL_TREE); 731 tree gfc_deallocate_scalar_with_status (tree, tree, tree, bool, gfc_expr*, 732 gfc_typespec, bool c = false); 733 734 /* Generate code to call realloc(). */ 735 tree gfc_call_realloc (stmtblock_t *, tree, tree); 736 737 /* Assign a derived type constructor to a variable. */ 738 tree gfc_trans_structure_assign (tree, gfc_expr *, bool, bool c = false); 739 740 /* Generate code for an assignment, includes scalarization. */ 741 tree gfc_trans_assignment (gfc_expr *, gfc_expr *, bool, bool, bool p = false, 742 bool a = true); 743 744 /* Generate code for a pointer assignment. */ 745 tree gfc_trans_pointer_assignment (gfc_expr *, gfc_expr *); 746 747 /* Initialize function decls for library functions. */ 748 void gfc_build_intrinsic_lib_fndecls (void); 749 /* Create function decls for IO library functions. */ 750 void gfc_build_io_library_fndecls (void); 751 /* Build a function decl for a library function. */ 752 tree gfc_build_library_function_decl (tree, tree, int, ...); 753 tree gfc_build_library_function_decl_with_spec (tree name, const char *spec, 754 tree rettype, int nargs, ...); 755 756 /* Process the local variable decls of a block construct. */ 757 void gfc_process_block_locals (gfc_namespace*); 758 759 /* Output initialization/clean-up code that was deferred. */ 760 void gfc_trans_deferred_vars (gfc_symbol*, gfc_wrapped_block *); 761 762 /* In f95-lang.c. */ 763 tree pushdecl (tree); 764 tree pushdecl_top_level (tree); 765 void pushlevel (void); 766 tree poplevel (int, int); 767 tree getdecls (void); 768 769 /* In trans-types.c. */ 770 struct array_descr_info; 771 bool gfc_get_array_descr_info (const_tree, struct array_descr_info *); 772 773 /* In trans-openmp.c */ 774 bool gfc_omp_privatize_by_reference (const_tree); 775 enum omp_clause_default_kind gfc_omp_predetermined_sharing (tree); 776 tree gfc_omp_report_decl (tree); 777 tree gfc_omp_clause_default_ctor (tree, tree, tree); 778 tree gfc_omp_clause_copy_ctor (tree, tree, tree); 779 tree gfc_omp_clause_assign_op (tree, tree, tree); 780 tree gfc_omp_clause_linear_ctor (tree, tree, tree, tree); 781 tree gfc_omp_clause_dtor (tree, tree); 782 void gfc_omp_finish_clause (tree, gimple_seq *); 783 bool gfc_omp_scalar_p (tree); 784 bool gfc_omp_disregard_value_expr (tree, bool); 785 bool gfc_omp_private_debug_clause (tree, bool); 786 bool gfc_omp_private_outer_ref (tree); 787 struct gimplify_omp_ctx; 788 void gfc_omp_firstprivatize_type_sizes (struct gimplify_omp_ctx *, tree); 789 790 /* Runtime library function decls. */ 791 extern GTY(()) tree gfor_fndecl_pause_numeric; 792 extern GTY(()) tree gfor_fndecl_pause_string; 793 extern GTY(()) tree gfor_fndecl_stop_numeric; 794 extern GTY(()) tree gfor_fndecl_stop_string; 795 extern GTY(()) tree gfor_fndecl_error_stop_numeric; 796 extern GTY(()) tree gfor_fndecl_error_stop_string; 797 extern GTY(()) tree gfor_fndecl_runtime_error; 798 extern GTY(()) tree gfor_fndecl_runtime_error_at; 799 extern GTY(()) tree gfor_fndecl_runtime_warning_at; 800 extern GTY(()) tree gfor_fndecl_os_error; 801 extern GTY(()) tree gfor_fndecl_generate_error; 802 extern GTY(()) tree gfor_fndecl_set_fpe; 803 extern GTY(()) tree gfor_fndecl_set_options; 804 extern GTY(()) tree gfor_fndecl_ttynam; 805 extern GTY(()) tree gfor_fndecl_ctime; 806 extern GTY(()) tree gfor_fndecl_fdate; 807 extern GTY(()) tree gfor_fndecl_in_pack; 808 extern GTY(()) tree gfor_fndecl_in_unpack; 809 extern GTY(()) tree gfor_fndecl_cfi_to_gfc; 810 extern GTY(()) tree gfor_fndecl_gfc_to_cfi; 811 extern GTY(()) tree gfor_fndecl_associated; 812 extern GTY(()) tree gfor_fndecl_system_clock4; 813 extern GTY(()) tree gfor_fndecl_system_clock8; 814 815 816 /* Coarray run-time library function decls. */ 817 extern GTY(()) tree gfor_fndecl_caf_init; 818 extern GTY(()) tree gfor_fndecl_caf_finalize; 819 extern GTY(()) tree gfor_fndecl_caf_this_image; 820 extern GTY(()) tree gfor_fndecl_caf_num_images; 821 extern GTY(()) tree gfor_fndecl_caf_register; 822 extern GTY(()) tree gfor_fndecl_caf_deregister; 823 extern GTY(()) tree gfor_fndecl_caf_get; 824 extern GTY(()) tree gfor_fndecl_caf_send; 825 extern GTY(()) tree gfor_fndecl_caf_sendget; 826 extern GTY(()) tree gfor_fndecl_caf_get_by_ref; 827 extern GTY(()) tree gfor_fndecl_caf_send_by_ref; 828 extern GTY(()) tree gfor_fndecl_caf_sendget_by_ref; 829 extern GTY(()) tree gfor_fndecl_caf_sync_all; 830 extern GTY(()) tree gfor_fndecl_caf_sync_memory; 831 extern GTY(()) tree gfor_fndecl_caf_sync_images; 832 extern GTY(()) tree gfor_fndecl_caf_stop_numeric; 833 extern GTY(()) tree gfor_fndecl_caf_stop_str; 834 extern GTY(()) tree gfor_fndecl_caf_error_stop; 835 extern GTY(()) tree gfor_fndecl_caf_error_stop_str; 836 extern GTY(()) tree gfor_fndecl_caf_atomic_def; 837 extern GTY(()) tree gfor_fndecl_caf_atomic_ref; 838 extern GTY(()) tree gfor_fndecl_caf_atomic_cas; 839 extern GTY(()) tree gfor_fndecl_caf_atomic_op; 840 extern GTY(()) tree gfor_fndecl_caf_lock; 841 extern GTY(()) tree gfor_fndecl_caf_unlock; 842 extern GTY(()) tree gfor_fndecl_caf_event_post; 843 extern GTY(()) tree gfor_fndecl_caf_event_wait; 844 extern GTY(()) tree gfor_fndecl_caf_event_query; 845 extern GTY(()) tree gfor_fndecl_caf_fail_image; 846 extern GTY(()) tree gfor_fndecl_caf_failed_images; 847 extern GTY(()) tree gfor_fndecl_caf_image_status; 848 extern GTY(()) tree gfor_fndecl_caf_stopped_images; 849 extern GTY(()) tree gfor_fndecl_caf_form_team; 850 extern GTY(()) tree gfor_fndecl_caf_change_team; 851 extern GTY(()) tree gfor_fndecl_caf_end_team; 852 extern GTY(()) tree gfor_fndecl_caf_get_team; 853 extern GTY(()) tree gfor_fndecl_caf_sync_team; 854 extern GTY(()) tree gfor_fndecl_caf_team_number; 855 extern GTY(()) tree gfor_fndecl_co_broadcast; 856 extern GTY(()) tree gfor_fndecl_co_max; 857 extern GTY(()) tree gfor_fndecl_co_min; 858 extern GTY(()) tree gfor_fndecl_co_reduce; 859 extern GTY(()) tree gfor_fndecl_co_sum; 860 extern GTY(()) tree gfor_fndecl_caf_is_present; 861 862 /* Math functions. Many other math functions are handled in 863 trans-intrinsic.c. */ 864 865 typedef struct GTY(()) gfc_powdecl_list { 866 tree integer; 867 tree real; 868 tree cmplx; 869 } 870 gfc_powdecl_list; 871 872 extern GTY(()) gfc_powdecl_list gfor_fndecl_math_powi[4][3]; 873 extern GTY(()) tree gfor_fndecl_math_ishftc4; 874 extern GTY(()) tree gfor_fndecl_math_ishftc8; 875 extern GTY(()) tree gfor_fndecl_math_ishftc16; 876 877 /* BLAS functions. */ 878 extern GTY(()) tree gfor_fndecl_sgemm; 879 extern GTY(()) tree gfor_fndecl_dgemm; 880 extern GTY(()) tree gfor_fndecl_cgemm; 881 extern GTY(()) tree gfor_fndecl_zgemm; 882 883 /* String functions. */ 884 extern GTY(()) tree gfor_fndecl_compare_string; 885 extern GTY(()) tree gfor_fndecl_concat_string; 886 extern GTY(()) tree gfor_fndecl_string_len_trim; 887 extern GTY(()) tree gfor_fndecl_string_index; 888 extern GTY(()) tree gfor_fndecl_string_scan; 889 extern GTY(()) tree gfor_fndecl_string_verify; 890 extern GTY(()) tree gfor_fndecl_string_trim; 891 extern GTY(()) tree gfor_fndecl_string_minmax; 892 extern GTY(()) tree gfor_fndecl_adjustl; 893 extern GTY(()) tree gfor_fndecl_adjustr; 894 extern GTY(()) tree gfor_fndecl_select_string; 895 extern GTY(()) tree gfor_fndecl_compare_string_char4; 896 extern GTY(()) tree gfor_fndecl_concat_string_char4; 897 extern GTY(()) tree gfor_fndecl_string_len_trim_char4; 898 extern GTY(()) tree gfor_fndecl_string_index_char4; 899 extern GTY(()) tree gfor_fndecl_string_scan_char4; 900 extern GTY(()) tree gfor_fndecl_string_verify_char4; 901 extern GTY(()) tree gfor_fndecl_string_trim_char4; 902 extern GTY(()) tree gfor_fndecl_string_minmax_char4; 903 extern GTY(()) tree gfor_fndecl_adjustl_char4; 904 extern GTY(()) tree gfor_fndecl_adjustr_char4; 905 extern GTY(()) tree gfor_fndecl_select_string_char4; 906 907 /* Conversion between character kinds. */ 908 extern GTY(()) tree gfor_fndecl_convert_char1_to_char4; 909 extern GTY(()) tree gfor_fndecl_convert_char4_to_char1; 910 911 /* Other misc. runtime library functions. */ 912 extern GTY(()) tree gfor_fndecl_size0; 913 extern GTY(()) tree gfor_fndecl_size1; 914 extern GTY(()) tree gfor_fndecl_iargc; 915 extern GTY(()) tree gfor_fndecl_kill; 916 extern GTY(()) tree gfor_fndecl_kill_sub; 917 extern GTY(()) tree gfor_fndecl_is_contiguous0; 918 919 /* Implemented in Fortran. */ 920 extern GTY(()) tree gfor_fndecl_sc_kind; 921 extern GTY(()) tree gfor_fndecl_si_kind; 922 extern GTY(()) tree gfor_fndecl_sr_kind; 923 924 /* IEEE-related. */ 925 extern GTY(()) tree gfor_fndecl_ieee_procedure_entry; 926 extern GTY(()) tree gfor_fndecl_ieee_procedure_exit; 927 928 /* RANDOM_INIT. */ 929 extern GTY(()) tree gfor_fndecl_random_init; 930 931 /* True if node is an integer constant. */ 932 #define INTEGER_CST_P(node) (TREE_CODE(node) == INTEGER_CST) 933 934 /* gfortran-specific declaration information, the _CONT versions denote 935 arrays with CONTIGUOUS attribute. */ 936 937 #define GFC_DTYPE_ELEM_LEN 0 938 #define GFC_DTYPE_VERSION 1 939 #define GFC_DTYPE_RANK 2 940 #define GFC_DTYPE_TYPE 3 941 #define GFC_DTYPE_ATTRIBUTE 4 942 943 enum gfc_array_kind 944 { 945 GFC_ARRAY_UNKNOWN, 946 GFC_ARRAY_ASSUMED_SHAPE, 947 GFC_ARRAY_ASSUMED_SHAPE_CONT, 948 GFC_ARRAY_ASSUMED_RANK, 949 GFC_ARRAY_ASSUMED_RANK_CONT, 950 GFC_ARRAY_ALLOCATABLE, 951 GFC_ARRAY_POINTER, 952 GFC_ARRAY_POINTER_CONT 953 }; 954 955 /* Array types only. */ 956 struct GTY(()) lang_type { 957 int rank, corank; 958 enum gfc_array_kind akind; 959 tree lbound[GFC_MAX_DIMENSIONS]; 960 tree ubound[GFC_MAX_DIMENSIONS]; 961 tree stride[GFC_MAX_DIMENSIONS]; 962 tree size; 963 tree offset; 964 tree dtype; 965 tree dataptr_type; 966 tree base_decl[2]; 967 tree nonrestricted_type; 968 tree caf_token; 969 tree caf_offset; 970 }; 971 972 struct GTY(()) lang_decl { 973 /* Dummy variables. */ 974 tree saved_descriptor; 975 /* Assigned integer nodes. Stringlength is the IO format string's length. 976 Addr is the address of the string or the target label. Stringlength is 977 initialized to -2 and assigned to -1 when addr is assigned to the 978 address of target label. */ 979 tree stringlen; 980 tree addr; 981 /* For assumed-shape coarrays. */ 982 tree token, caf_offset; 983 unsigned int scalar_allocatable : 1; 984 unsigned int scalar_pointer : 1; 985 }; 986 987 988 #define GFC_DECL_ASSIGN_ADDR(node) DECL_LANG_SPECIFIC(node)->addr 989 #define GFC_DECL_STRING_LEN(node) DECL_LANG_SPECIFIC(node)->stringlen 990 #define GFC_DECL_TOKEN(node) DECL_LANG_SPECIFIC(node)->token 991 #define GFC_DECL_CAF_OFFSET(node) DECL_LANG_SPECIFIC(node)->caf_offset 992 #define GFC_DECL_SAVED_DESCRIPTOR(node) \ 993 (DECL_LANG_SPECIFIC(node)->saved_descriptor) 994 #define GFC_DECL_SCALAR_ALLOCATABLE(node) \ 995 (DECL_LANG_SPECIFIC (node)->scalar_allocatable) 996 #define GFC_DECL_SCALAR_POINTER(node) \ 997 (DECL_LANG_SPECIFIC (node)->scalar_pointer) 998 #define GFC_DECL_GET_SCALAR_ALLOCATABLE(node) \ 999 (DECL_LANG_SPECIFIC (node) ? GFC_DECL_SCALAR_ALLOCATABLE (node) : 0) 1000 #define GFC_DECL_GET_SCALAR_POINTER(node) \ 1001 (DECL_LANG_SPECIFIC (node) ? GFC_DECL_SCALAR_POINTER (node) : 0) 1002 #define GFC_DECL_PACKED_ARRAY(node) DECL_LANG_FLAG_0(node) 1003 #define GFC_DECL_PARTIAL_PACKED_ARRAY(node) DECL_LANG_FLAG_1(node) 1004 #define GFC_DECL_ASSIGN(node) DECL_LANG_FLAG_2(node) 1005 #define GFC_DECL_COMMON_OR_EQUIV(node) DECL_LANG_FLAG_3(node) 1006 #define GFC_DECL_CRAY_POINTEE(node) DECL_LANG_FLAG_4(node) 1007 #define GFC_DECL_RESULT(node) DECL_LANG_FLAG_5(node) 1008 #define GFC_DECL_PTR_ARRAY_P(node) DECL_LANG_FLAG_6(node) 1009 #define GFC_DECL_ASSOCIATE_VAR_P(node) DECL_LANG_FLAG_7(node) 1010 #define GFC_DECL_CLASS(node) DECL_LANG_FLAG_8(node) 1011 1012 /* An array descriptor. */ 1013 #define GFC_DESCRIPTOR_TYPE_P(node) TYPE_LANG_FLAG_1(node) 1014 /* An array without a descriptor. */ 1015 #define GFC_ARRAY_TYPE_P(node) TYPE_LANG_FLAG_2(node) 1016 /* Fortran CLASS type. */ 1017 #define GFC_CLASS_TYPE_P(node) TYPE_LANG_FLAG_4(node) 1018 /* The GFC_TYPE_ARRAY_* members are present in both descriptor and 1019 descriptorless array types. */ 1020 #define GFC_TYPE_ARRAY_LBOUND(node, dim) \ 1021 (TYPE_LANG_SPECIFIC(node)->lbound[dim]) 1022 #define GFC_TYPE_ARRAY_UBOUND(node, dim) \ 1023 (TYPE_LANG_SPECIFIC(node)->ubound[dim]) 1024 #define GFC_TYPE_ARRAY_STRIDE(node, dim) \ 1025 (TYPE_LANG_SPECIFIC(node)->stride[dim]) 1026 #define GFC_TYPE_ARRAY_RANK(node) (TYPE_LANG_SPECIFIC(node)->rank) 1027 #define GFC_TYPE_ARRAY_CORANK(node) (TYPE_LANG_SPECIFIC(node)->corank) 1028 #define GFC_TYPE_ARRAY_CAF_TOKEN(node) (TYPE_LANG_SPECIFIC(node)->caf_token) 1029 #define GFC_TYPE_ARRAY_CAF_OFFSET(node) (TYPE_LANG_SPECIFIC(node)->caf_offset) 1030 #define GFC_TYPE_ARRAY_SIZE(node) (TYPE_LANG_SPECIFIC(node)->size) 1031 #define GFC_TYPE_ARRAY_OFFSET(node) (TYPE_LANG_SPECIFIC(node)->offset) 1032 #define GFC_TYPE_ARRAY_AKIND(node) (TYPE_LANG_SPECIFIC(node)->akind) 1033 /* Code should use gfc_get_dtype instead of accessing this directly. It may 1034 not be known when the type is created. */ 1035 #define GFC_TYPE_ARRAY_DTYPE(node) (TYPE_LANG_SPECIFIC(node)->dtype) 1036 #define GFC_TYPE_ARRAY_DATAPTR_TYPE(node) \ 1037 (TYPE_LANG_SPECIFIC(node)->dataptr_type) 1038 #define GFC_TYPE_ARRAY_BASE_DECL(node, internal) \ 1039 (TYPE_LANG_SPECIFIC(node)->base_decl[(internal)]) 1040 1041 1042 /* Build an expression with void type. */ 1043 #define build1_v(code, arg) \ 1044 fold_build1_loc (input_location, code, void_type_node, arg) 1045 #define build2_v(code, arg1, arg2) \ 1046 fold_build2_loc (input_location, code, void_type_node, arg1, arg2) 1047 #define build3_v(code, arg1, arg2, arg3) \ 1048 fold_build3_loc (input_location, code, void_type_node, arg1, arg2, arg3) 1049 #define build4_v(code, arg1, arg2, arg3, arg4) \ 1050 build4_loc (input_location, code, void_type_node, arg1, arg2, \ 1051 arg3, arg4) 1052 1053 /* This group of functions allows a caller to evaluate an expression from 1054 the callee's interface. It establishes a mapping between the interface's 1055 dummy arguments and the caller's actual arguments, then applies that 1056 mapping to a given gfc_expr. 1057 1058 You can initialize a mapping structure like so: 1059 1060 gfc_interface_mapping mapping; 1061 ... 1062 gfc_init_interface_mapping (&mapping); 1063 1064 You should then evaluate each actual argument into a temporary 1065 gfc_se structure, here called "se", and map the result to the 1066 dummy argument's symbol, here called "sym": 1067 1068 gfc_add_interface_mapping (&mapping, sym, &se); 1069 1070 After adding all mappings, you should call: 1071 1072 gfc_finish_interface_mapping (&mapping, pre, post); 1073 1074 where "pre" and "post" are statement blocks for initialization 1075 and finalization code respectively. You can then evaluate an 1076 interface expression "expr" as follows: 1077 1078 gfc_apply_interface_mapping (&mapping, se, expr); 1079 1080 Once you've evaluated all expressions, you should free 1081 the mapping structure with: 1082 1083 gfc_free_interface_mapping (&mapping); */ 1084 1085 1086 /* This structure represents a mapping from OLD to NEW, where OLD is a 1087 dummy argument symbol and NEW is a symbol that represents the value 1088 of an actual argument. Mappings are linked together using NEXT 1089 (in no particular order). */ 1090 typedef struct gfc_interface_sym_mapping 1091 { 1092 struct gfc_interface_sym_mapping *next; 1093 gfc_symbol *old; 1094 gfc_symtree *new_sym; 1095 gfc_expr *expr; 1096 } 1097 gfc_interface_sym_mapping; 1098 1099 1100 /* This structure is used by callers to evaluate an expression from 1101 a callee's interface. */ 1102 typedef struct gfc_interface_mapping 1103 { 1104 /* Maps the interface's dummy arguments to the values that the caller 1105 is passing. The whole list is owned by this gfc_interface_mapping. */ 1106 gfc_interface_sym_mapping *syms; 1107 1108 /* A list of gfc_charlens that were needed when creating copies of 1109 expressions. The whole list is owned by this gfc_interface_mapping. */ 1110 gfc_charlen *charlens; 1111 } 1112 gfc_interface_mapping; 1113 1114 void gfc_init_interface_mapping (gfc_interface_mapping *); 1115 void gfc_free_interface_mapping (gfc_interface_mapping *); 1116 void gfc_add_interface_mapping (gfc_interface_mapping *, 1117 gfc_symbol *, gfc_se *, gfc_expr *); 1118 void gfc_finish_interface_mapping (gfc_interface_mapping *, 1119 stmtblock_t *, stmtblock_t *); 1120 void gfc_apply_interface_mapping (gfc_interface_mapping *, 1121 gfc_se *, gfc_expr *); 1122 1123 1124 /* Standard error messages used in all the trans-*.c files. */ 1125 extern const char gfc_msg_fault[]; 1126 extern const char gfc_msg_wrong_return[]; 1127 1128 #define OMPWS_WORKSHARE_FLAG 1 /* Set if in a workshare construct. */ 1129 #define OMPWS_CURR_SINGLEUNIT 2 /* Set if current gfc_code in workshare 1130 construct is not workshared. */ 1131 #define OMPWS_SCALARIZER_WS 4 /* Set if scalarizer should attempt 1132 to create parallel loops. */ 1133 #define OMPWS_SCALARIZER_BODY 8 /* Set if handling body of potential 1134 parallel loop. */ 1135 #define OMPWS_NOWAIT 16 /* Use NOWAIT on OMP_FOR. */ 1136 extern int ompws_flags; 1137 1138 #endif /* GFC_TRANS_H */ 1139