gcc/ipa-prop.h

   1 /* Interprocedural analyses.
   2    Copyright (C) 2005-2013 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 3, or (at your option) any later
   9 version.
  10
  11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING3.  If not see
  18 <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef IPA_PROP_H
  21 #define IPA_PROP_H
  22
  23 #include "tree.h"
  24 #include "vec.h"
  25 #include "cgraph.h"
  26 #include "gimple.h"
  27 #include "alloc-pool.h"
  28
  29 /* The following definitions and interfaces are used by
  30    interprocedural analyses or parameters.  */
  31
  32 /* ipa-prop.c stuff (ipa-cp, indirect inlining):  */
  33
  34 /* A jump function for a callsite represents the values passed as actual
  35    arguments of the callsite.  They were originally proposed in a paper called
  36    "Interprocedural Constant Propagation", by David Callahan, Keith D Cooper,
  37    Ken Kennedy, Linda Torczon in Comp86, pg 152-161.  There are three main
  38    types of values :
  39
  40    Pass-through - the caller's formal parameter is passed as an actual
  41                   argument, possibly one simple operation performed on it.
  42    Constant     - a constant (is_gimple_ip_invariant)is passed as an actual
  43                   argument.
  44    Unknown      - neither of the above.
  45
  46    IPA_JF_ANCESTOR is a special pass-through jump function, which means that
  47    the result is an address of a part of the object pointed to by the formal
  48    parameter to which the function refers.  It is mainly intended to represent
  49    getting addresses of of ancestor fields in C++
  50    (e.g. &this_1(D)->D.1766.D.1756).  Note that if the original pointer is
  51    NULL, ancestor jump function must behave like a simple pass-through.
  52
  53    Other pass-through functions can either simply pass on an unchanged formal
  54    parameter or can apply one simple binary operation to it (such jump
  55    functions are called polynomial).
  56
  57    IPA_JF_KNOWN_TYPE is a special type of an "unknown" function that applies
  58    only to pointer parameters.  It means that even though we cannot prove that
  59    the passed value is an interprocedural constant, we still know the exact
  60    type of the containing object which may be valuable for devirtualization.
  61
  62    Jump functions are computed in ipa-prop.c by function
  63    update_call_notes_after_inlining.  Some information can be lost and jump
  64    functions degraded accordingly when inlining, see
  65    update_call_notes_after_inlining in the same file.  */
  66
  67 enum jump_func_type
  68 {
  69   IPA_JF_UNKNOWN = 0,  /* newly allocated and zeroed jump functions default */
  70   IPA_JF_KNOWN_TYPE,        /* represented by field known_type */
  71   IPA_JF_CONST,             /* represented by field costant */
  72   IPA_JF_PASS_THROUGH,      /* represented by field pass_through */
  73   IPA_JF_ANCESTOR           /* represented by field ancestor */
  74 };
  75
  76 /* Structure holding data required to describe a known type jump function.  */
  77 struct GTY(()) ipa_known_type_data
  78 {
  79   /* Offset of the component of the base_type being described.  */
  80   HOST_WIDE_INT offset;
  81   /* Type of the whole object.  */
  82   tree base_type;
  83   /* Type of the component of the object that is being described.  */
  84   tree component_type;
  85 };
  86
  87 /* Structure holding data required to describe a pass-through jump function.  */
  88
  89 struct GTY(()) ipa_pass_through_data
  90 {
  91   /* If an operation is to be performed on the original parameter, this is the
  92      second (constant) operand.  */
  93   tree operand;
  94   /* Number of the caller's formal parameter being passed.  */
  95   int formal_id;
  96   /* Operation that is performed on the argument before it is passed on.
  97      NOP_EXPR means no operation.  Otherwise oper must be a simple binary
  98      arithmetic operation where the caller's parameter is the first operand and
  99      operand field from this structure is the second one.  */
 100   enum tree_code operation;
 101   /* When the passed value is a pointer, it is set to true only when we are
 102      certain that no write to the object it points to has occurred since the
 103      caller functions started execution, except for changes noted in the
 104      aggregate part of the jump function (see description of
 105      ipa_agg_jump_function).  The flag is used only when the operation is
 106      NOP_EXPR.  */
 107   bool agg_preserved;
 108 };
 109
 110 /* Structure holding data required to describe an ancestor pass-through
 111    jump function.  */
 112
 113 struct GTY(()) ipa_ancestor_jf_data
 114 {
 115   /* Offset of the field representing the ancestor.  */
 116   HOST_WIDE_INT offset;
 117   /* Type of the result.  */
 118   tree type;
 119   /* Number of the caller's formal parameter being passed.  */
 120   int formal_id;
 121   /* Flag with the same meaning like agg_preserve in ipa_pass_through_data.  */
 122   bool agg_preserved;
 123 };
 124
 125 /* An element in an aggegate part of a jump function describing a known value
 126    at a given offset.  When it is part of a pass-through jump function with
 127    agg_preserved set or an ancestor jump function with agg_preserved set, all
 128    unlisted positions are assumed to be preserved but the value can be a type
 129    node, which means that the particular piece (starting at offset and having
 130    the size of the type) is clobbered with an unknown value.  When
 131    agg_preserved is false or the type of the containing jump function is
 132    different, all unlisted parts are assumed to be unknown and all values must
 133    fullfill is_gimple_ip_invariant.  */
 134
 135 typedef struct GTY(()) ipa_agg_jf_item
 136 {
 137   /* The offset at which the known value is located within the aggregate.  */
 138   HOST_WIDE_INT offset;
 139
 140   /* The known constant or type if this is a clobber.  */
 141   tree value;
 142 } ipa_agg_jf_item_t;
 143
 144
 145 /* Aggregate jump function - i.e. description of contents of aggregates passed
 146    either by reference or value.  */
 147
 148 struct GTY(()) ipa_agg_jump_function
 149 {
 150   /* Description of the individual items.  */
 151   vec<ipa_agg_jf_item_t, va_gc> *items;
 152   /* True if the data was passed by reference (as opposed to by value). */
 153   bool by_ref;
 154 };
 155
 156 typedef struct ipa_agg_jump_function *ipa_agg_jump_function_p;
 157 typedef struct ipa_agg_jump_function ipa_agg_jump_function_t;
 158
 159 /* A jump function for a callsite represents the values passed as actual
 160    arguments of the callsite. See enum jump_func_type for the various
 161    types of jump functions supported.  */
 162 typedef struct GTY (()) ipa_jump_func
 163 {
 164   /* Aggregate contants description.  See struct ipa_agg_jump_function and its
 165      description.  */
 166   struct ipa_agg_jump_function agg;
 167
 168   enum jump_func_type type;
 169   /* Represents a value of a jump function.  pass_through is used only in jump
 170      function context.  constant represents the actual constant in constant jump
 171      functions and member_cst holds constant c++ member functions.  */
 172   union jump_func_value
 173   {
 174     struct ipa_known_type_data GTY ((tag ("IPA_JF_KNOWN_TYPE"))) known_type;
 175     tree GTY ((tag ("IPA_JF_CONST"))) constant;
 176     struct ipa_pass_through_data GTY ((tag ("IPA_JF_PASS_THROUGH"))) pass_through;
 177     struct ipa_ancestor_jf_data GTY ((tag ("IPA_JF_ANCESTOR"))) ancestor;
 178   } GTY ((desc ("%1.type"))) value;
 179 } ipa_jump_func_t;
 180
 181
 182 /* Return the offset of the component that is decribed by a known type jump
 183    function JFUNC.  */
 184
 185 static inline HOST_WIDE_INT
 186 ipa_get_jf_known_type_offset (struct ipa_jump_func *jfunc)
 187 {
 188   gcc_checking_assert (jfunc->type == IPA_JF_KNOWN_TYPE);
 189   return jfunc->value.known_type.offset;
 190 }
 191
 192 /* Return the base type of a known type jump function JFUNC.  */
 193
 194 static inline tree
 195 ipa_get_jf_known_type_base_type (struct ipa_jump_func *jfunc)
 196 {
 197   gcc_checking_assert (jfunc->type == IPA_JF_KNOWN_TYPE);
 198   return jfunc->value.known_type.base_type;
 199 }
 200
 201 /* Return the component type of a known type jump function JFUNC.  */
 202
 203 static inline tree
 204 ipa_get_jf_known_type_component_type (struct ipa_jump_func *jfunc)
 205 {
 206   gcc_checking_assert (jfunc->type == IPA_JF_KNOWN_TYPE);
 207   return jfunc->value.known_type.component_type;
 208 }
 209
 210 /* Return the constant stored in a constant jump functin JFUNC.  */
 211
 212 static inline tree
 213 ipa_get_jf_constant (struct ipa_jump_func *jfunc)
 214 {
 215   gcc_checking_assert (jfunc->type == IPA_JF_CONST);
 216   return jfunc->value.constant;
 217 }
 218
 219 /* Return the operand of a pass through jmp function JFUNC.  */
 220
 221 static inline tree
 222 ipa_get_jf_pass_through_operand (struct ipa_jump_func *jfunc)
 223 {
 224   gcc_checking_assert (jfunc->type == IPA_JF_PASS_THROUGH);
 225   return jfunc->value.pass_through.operand;
 226 }
 227
 228 /* Return the number of the caller's formal parameter that a pass through jump
 229    function JFUNC refers to.  */
 230
 231 static inline int
 232 ipa_get_jf_pass_through_formal_id (struct ipa_jump_func *jfunc)
 233 {
 234   gcc_checking_assert (jfunc->type == IPA_JF_PASS_THROUGH);
 235   return jfunc->value.pass_through.formal_id;
 236 }
 237
 238 /* Return operation of a pass through jump function JFUNC.  */
 239
 240 static inline enum tree_code
 241 ipa_get_jf_pass_through_operation (struct ipa_jump_func *jfunc)
 242 {
 243   gcc_checking_assert (jfunc->type == IPA_JF_PASS_THROUGH);
 244   return jfunc->value.pass_through.operation;
 245 }
 246
 247 /* Return the agg_preserved flag of a pass through jump functin JFUNC.  */
 248
 249 static inline bool
 250 ipa_get_jf_pass_through_agg_preserved (struct ipa_jump_func *jfunc)
 251 {
 252   gcc_checking_assert (jfunc->type == IPA_JF_PASS_THROUGH);
 253   return jfunc->value.pass_through.agg_preserved;
 254 }
 255
 256 /* Return the offset of an ancestor jump function JFUNC.  */
 257
 258 static inline HOST_WIDE_INT
 259 ipa_get_jf_ancestor_offset (struct ipa_jump_func *jfunc)
 260 {
 261   gcc_checking_assert (jfunc->type == IPA_JF_ANCESTOR);
 262   return jfunc->value.ancestor.offset;
 263 }
 264
 265 /* Return the result type of an ancestor jump function JFUNC.  */
 266
 267 static inline tree
 268 ipa_get_jf_ancestor_type (struct ipa_jump_func *jfunc)
 269 {
 270   gcc_checking_assert (jfunc->type == IPA_JF_ANCESTOR);
 271   return jfunc->value.ancestor.type;
 272 }
 273
 274 /* Return the number of the caller's formal parameter that an ancestor jump
 275    function JFUNC refers to.  */
 276
 277 static inline int
 278 ipa_get_jf_ancestor_formal_id (struct ipa_jump_func *jfunc)
 279 {
 280   gcc_checking_assert (jfunc->type == IPA_JF_ANCESTOR);
 281   return jfunc->value.ancestor.formal_id;
 282 }
 283
 284 /* Return the agg_preserved flag of an ancestor jump functin JFUNC.  */
 285
 286 static inline bool
 287 ipa_get_jf_ancestor_agg_preserved (struct ipa_jump_func *jfunc)
 288 {
 289   gcc_checking_assert (jfunc->type == IPA_JF_ANCESTOR);
 290   return jfunc->value.ancestor.agg_preserved;
 291 }
 292
 293 /* Summary describing a single formal parameter.  */
 294
 295 struct ipa_param_descriptor
 296 {
 297   /* PARAM_DECL of this parameter.  */
 298   tree decl;
 299   /* The parameter is used.  */
 300   unsigned used : 1;
 301 };
 302
 303 typedef struct ipa_param_descriptor ipa_param_descriptor_t;
 304 struct ipcp_lattice;
 305
 306 /* ipa_node_params stores information related to formal parameters of functions
 307    and some other information for interprocedural passes that operate on
 308    parameters (such as ipa-cp).  */
 309
 310 struct ipa_node_params
 311 {
 312   /* Information about individual formal parameters that are gathered when
 313      summaries are generated. */
 314   vec<ipa_param_descriptor_t> descriptors;
 315   /* Pointer to an array of structures describing individual formal
 316      parameters.  */
 317   struct ipcp_param_lattices *lattices;
 318   /* Only for versioned nodes this field would not be NULL,
 319      it points to the node that IPA cp cloned from.  */
 320   struct cgraph_node *ipcp_orig_node;
 321   /* If this node is an ipa-cp clone, these are the known values that describe
 322      what it has been specialized for.  */
 323   vec<tree> known_vals;
 324   /* Whether the param uses analysis has already been performed.  */
 325   unsigned uses_analysis_done : 1;
 326   /* Whether the function is enqueued in ipa-cp propagation stack.  */
 327   unsigned node_enqueued : 1;
 328   /* Whether we should create a specialized version based on values that are
 329      known to be constant in all contexts.  */
 330   unsigned do_clone_for_all_contexts : 1;
 331   /* Set if this is an IPA-CP clone for all contexts.  */
 332   unsigned is_all_contexts_clone : 1;
 333   /* Node has been completely replaced by clones and will be removed after
 334      ipa-cp is finished.  */
 335   unsigned node_dead : 1;
 336 };
 337
 338 /* ipa_node_params access functions.  Please use these to access fields that
 339    are or will be shared among various passes.  */
 340
 341 /* Return the number of formal parameters. */
 342
 343 static inline int
 344 ipa_get_param_count (struct ipa_node_params *info)
 345 {
 346   return info->descriptors.length ();
 347 }
 348
 349 /* Return the declaration of Ith formal parameter of the function corresponding
 350    to INFO.  Note there is no setter function as this array is built just once
 351    using ipa_initialize_node_params. */
 352
 353 static inline tree
 354 ipa_get_param (struct ipa_node_params *info, int i)
 355 {
 356   return info->descriptors[i].decl;
 357 }
 358
 359 /* Set the used flag corresponding to the Ith formal parameter of the function
 360    associated with INFO to VAL.  */
 361
 362 static inline void
 363 ipa_set_param_used (struct ipa_node_params *info, int i, bool val)
 364 {
 365   info->descriptors[i].used = val;
 366 }
 367
 368 /* Return the used flag corresponding to the Ith formal parameter of the
 369    function associated with INFO.  */
 370
 371 static inline bool
 372 ipa_is_param_used (struct ipa_node_params *info, int i)
 373 {
 374   return info->descriptors[i].used;
 375 }
 376
 377 /* Information about replacements done in aggregates for a given node (each
 378    node has its linked list).  */
 379 struct GTY(()) ipa_agg_replacement_value
 380 {
 381   /* Next item in the linked list.  */
 382   struct ipa_agg_replacement_value *next;
 383   /* Offset within the aggregate.  */
 384   HOST_WIDE_INT offset;
 385   /* The constant value.  */
 386   tree value;
 387   /* The paramter index.  */
 388   int index;
 389 };
 390
 391 typedef struct ipa_agg_replacement_value *ipa_agg_replacement_value_p;
 392
 393 void ipa_set_node_agg_value_chain (struct cgraph_node *node,
 394                                    struct ipa_agg_replacement_value *aggvals);
 395
 396 /* ipa_edge_args stores information related to a callsite and particularly its
 397    arguments.  It can be accessed by the IPA_EDGE_REF macro.  */
 398 typedef struct GTY(()) ipa_edge_args
 399 {
 400   /* Vector of the callsite's jump function of each parameter.  */
 401   vec<ipa_jump_func_t, va_gc> *jump_functions;
 402 } ipa_edge_args_t;
 403
 404 /* ipa_edge_args access functions.  Please use these to access fields that
 405    are or will be shared among various passes.  */
 406
 407 /* Return the number of actual arguments. */
 408
 409 static inline int
 410 ipa_get_cs_argument_count (struct ipa_edge_args *args)
 411 {
 412   return vec_safe_length (args->jump_functions);
 413 }
 414
 415 /* Returns a pointer to the jump function for the ith argument.  Please note
 416    there is no setter function as jump functions are all set up in
 417    ipa_compute_jump_functions. */
 418
 419 static inline struct ipa_jump_func *
 420 ipa_get_ith_jump_func (struct ipa_edge_args *args, int i)
 421 {
 422   return &(*args->jump_functions)[i];
 423 }
 424
 425 /* Vectors need to have typedefs of structures.  */
 426 typedef struct ipa_node_params ipa_node_params_t;
 427
 428 /* Types of vectors holding the infos.  */
 429
 430 /* Vector where the parameter infos are actually stored. */
 431 extern vec<ipa_node_params_t> ipa_node_params_vector;
 432 /* Vector of known aggregate values in cloned nodes.  */
 433 extern GTY(()) vec<ipa_agg_replacement_value_p, va_gc> *ipa_node_agg_replacements;
 434 /* Vector where the parameter infos are actually stored. */
 435 extern GTY(()) vec<ipa_edge_args_t, va_gc> *ipa_edge_args_vector;
 436
 437 /* Return the associated parameter/argument info corresponding to the given
 438    node/edge.  */
 439 #define IPA_NODE_REF(NODE) (&ipa_node_params_vector[(NODE)->uid])
 440 #define IPA_EDGE_REF(EDGE) (&(*ipa_edge_args_vector)[(EDGE)->uid])
 441 /* This macro checks validity of index returned by
 442    ipa_get_param_decl_index function.  */
 443 #define IS_VALID_JUMP_FUNC_INDEX(I) ((I) != -1)
 444
 445 /* Creating and freeing ipa_node_params and ipa_edge_args.  */
 446 void ipa_create_all_node_params (void);
 447 void ipa_create_all_edge_args (void);
 448 void ipa_free_edge_args_substructures (struct ipa_edge_args *);
 449 void ipa_free_node_params_substructures (struct ipa_node_params *);
 450 void ipa_free_all_node_params (void);
 451 void ipa_free_all_edge_args (void);
 452 void ipa_free_all_structures_after_ipa_cp (void);
 453 void ipa_free_all_structures_after_iinln (void);
 454 void ipa_register_cgraph_hooks (void);
 455
 456 /* This function ensures the array of node param infos is big enough to
 457    accommodate a structure for all nodes and reallocates it if not.  */
 458
 459 static inline void
 460 ipa_check_create_node_params (void)
 461 {
 462   if (!ipa_node_params_vector.exists ())
 463     ipa_node_params_vector.create (cgraph_max_uid);
 464
 465   if (ipa_node_params_vector.length () <= (unsigned) cgraph_max_uid)
 466     ipa_node_params_vector.safe_grow_cleared (cgraph_max_uid + 1);
 467 }
 468
 469 /* This function ensures the array of edge arguments infos is big enough to
 470    accommodate a structure for all edges and reallocates it if not.  */
 471
 472 static inline void
 473 ipa_check_create_edge_args (void)
 474 {
 475   if (vec_safe_length (ipa_edge_args_vector) <= (unsigned) cgraph_edge_max_uid)
 476     vec_safe_grow_cleared (ipa_edge_args_vector, cgraph_edge_max_uid + 1);
 477 }
 478
 479 /* Returns true if the array of edge infos is large enough to accommodate an
 480    info for EDGE.  The main purpose of this function is that debug dumping
 481    function can check info availability without causing reallocations.  */
 482
 483 static inline bool
 484 ipa_edge_args_info_available_for_edge_p (struct cgraph_edge *edge)
 485 {
 486   return ((unsigned) edge->uid < vec_safe_length (ipa_edge_args_vector));
 487 }
 488
 489 /* Return the aggregate replacements for NODE, if there are any.  */
 490
 491 static inline struct ipa_agg_replacement_value *
 492 ipa_get_agg_replacements_for_node (struct cgraph_node *node)
 493 {
 494   if ((unsigned) node->uid >= vec_safe_length (ipa_node_agg_replacements))
 495     return NULL;
 496   return (*ipa_node_agg_replacements)[node->uid];
 497 }
 498
 499 /* Function formal parameters related computations.  */
 500 void ipa_initialize_node_params (struct cgraph_node *node);
 501 bool ipa_propagate_indirect_call_infos (struct cgraph_edge *cs,
 502                                         vec<cgraph_edge_p> *new_edges);
 503
 504 /* Indirect edge and binfo processing.  */
 505 tree ipa_get_indirect_edge_target (struct cgraph_edge *ie,
 506                                    vec<tree> ,
 507                                    vec<tree> ,
 508                                    vec<ipa_agg_jump_function_p> );
 509 struct cgraph_edge *ipa_make_edge_direct_to_target (struct cgraph_edge *, tree);
 510 tree ipa_binfo_from_known_type_jfunc (struct ipa_jump_func *);
 511 tree ipa_intraprocedural_devirtualization (gimple);
 512
 513 /* Functions related to both.  */
 514 void ipa_analyze_node (struct cgraph_node *);
 515
 516 /* Aggregate jump function related functions.  */
 517 tree ipa_find_agg_cst_for_param (struct ipa_agg_jump_function *, HOST_WIDE_INT,
 518                                  bool);
 519 bool ipa_load_from_parm_agg (struct ipa_node_params *, gimple, tree, int *,
 520                              HOST_WIDE_INT *, bool *);
 521
 522 /* Debugging interface.  */
 523 void ipa_print_node_params (FILE *, struct cgraph_node *node);
 524 void ipa_print_all_params (FILE *);
 525 void ipa_print_node_jump_functions (FILE *f, struct cgraph_node *node);
 526 void ipa_print_all_jump_functions (FILE * f);
 527 void ipcp_verify_propagated_values (void);
 528
 529 extern alloc_pool ipcp_values_pool;
 530 extern alloc_pool ipcp_sources_pool;
 531 extern alloc_pool ipcp_agg_lattice_pool;
 532
 533 /* Structure to describe transformations of formal parameters and actual
 534    arguments.  Each instance describes one new parameter and they are meant to
 535    be stored in a vector.  Additionally, most users will probably want to store
 536    adjustments about parameters that are being removed altogether so that SSA
 537    names belonging to them can be replaced by SSA names of an artificial
 538    variable.  */
 539 struct ipa_parm_adjustment
 540 {
 541   /* The original PARM_DECL itself, helpful for processing of the body of the
 542      function itself.  Intended for traversing function bodies.
 543      ipa_modify_formal_parameters, ipa_modify_call_arguments and
 544      ipa_combine_adjustments ignore this and use base_index.
 545      ipa_modify_formal_parameters actually sets this.  */
 546   tree base;
 547
 548   /* Type of the new parameter.  However, if by_ref is true, the real type will
 549      be a pointer to this type.  */
 550   tree type;
 551
 552   /* Alias refrerence type to be used in MEM_REFs when adjusting caller
 553      arguments.  */
 554   tree alias_ptr_type;
 555
 556   /* The new declaration when creating/replacing a parameter.  Created by
 557      ipa_modify_formal_parameters, useful for functions modifying the body
 558      accordingly. */
 559   tree reduction;
 560
 561   /* New declaration of a substitute variable that we may use to replace all
 562      non-default-def ssa names when a parm decl is going away.  */
 563   tree new_ssa_base;
 564
 565   /* If non-NULL and the original parameter is to be removed (copy_param below
 566      is NULL), this is going to be its nonlocalized vars value.  */
 567   tree nonlocal_value;
 568
 569   /* Offset into the original parameter (for the cases when the new parameter
 570      is a component of an original one).  */
 571   HOST_WIDE_INT offset;
 572
 573   /* Zero based index of the original parameter this one is based on.  (ATM
 574      there is no way to insert a new parameter out of the blue because there is
 575      no need but if it arises the code can be easily exteded to do so.)  */
 576   int base_index;
 577
 578   /* This new parameter is an unmodified parameter at index base_index. */
 579   unsigned copy_param : 1;
 580
 581   /* This adjustment describes a parameter that is about to be removed
 582      completely.  Most users will probably need to book keep those so that they
 583      don't leave behinfd any non default def ssa names belonging to them.  */
 584   unsigned remove_param : 1;
 585
 586   /* The parameter is to be passed by reference.  */
 587   unsigned by_ref : 1;
 588 };
 589
 590 typedef struct ipa_parm_adjustment ipa_parm_adjustment_t;
 591
 592 typedef vec<ipa_parm_adjustment_t> ipa_parm_adjustment_vec;
 593
 594 vec<tree> ipa_get_vector_of_formal_parms (tree fndecl);
 595 void ipa_modify_formal_parameters (tree fndecl, ipa_parm_adjustment_vec,
 596                                    const char *);
 597 void ipa_modify_call_arguments (struct cgraph_edge *, gimple,
 598                                 ipa_parm_adjustment_vec);
 599 ipa_parm_adjustment_vec ipa_combine_adjustments (ipa_parm_adjustment_vec,
 600                                                  ipa_parm_adjustment_vec);
 601 void ipa_dump_param_adjustments (FILE *, ipa_parm_adjustment_vec, tree);
 602 void ipa_dump_agg_replacement_values (FILE *f,
 603                                       struct ipa_agg_replacement_value *av);
 604 void ipa_prop_write_jump_functions (void);
 605 void ipa_prop_read_jump_functions (void);
 606 void ipa_prop_write_all_agg_replacement (void);
 607 void ipa_prop_read_all_agg_replacement (void);
 608 void ipa_update_after_lto_read (void);
 609 int ipa_get_param_decl_index (struct ipa_node_params *, tree);
 610 tree ipa_value_from_jfunc (struct ipa_node_params *info,
 611                            struct ipa_jump_func *jfunc);
 612 unsigned int ipcp_transform_function (struct cgraph_node *node);
 613
 614
 615 /* From tree-sra.c:  */
 616 tree build_ref_for_offset (location_t, tree, HOST_WIDE_INT, tree,
 617                            gimple_stmt_iterator *, bool);
 618
 619 #endif /* IPA_PROP_H */