gcc/ipa-prop.h

   1 /* Interprocedural analyses.
   2    Copyright (C) 2005, 2007, 2008, 2009, 2010
   3    Free Software Foundation, Inc.
   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 IPA_PROP_H
  22 #define IPA_PROP_H
  23
  24 #include "tree.h"
  25 #include "vec.h"
  26 #include "cgraph.h"
  27 #include "gimple.h"
  28 #include "alloc-pool.h"
  29
  30 /* The following definitions and interfaces are used by
  31    interprocedural analyses or parameters.  */
  32
  33 /* ipa-prop.c stuff (ipa-cp, indirect inlining):  */
  34
  35 /* A jump function for a callsite represents the values passed as actual
  36    arguments of the callsite.  They were originally proposed in a paper called
  37    "Interprocedural Constant Propagation", by David Callahan, Keith D Cooper,
  38    Ken Kennedy, Linda Torczon in Comp86, pg 152-161.  There are three main
  39    types of values :
  40
  41    Pass-through - the caller's formal parameter is passed as an actual
  42                   argument, possibly one simple operation performed on it.
  43    Constant     - a constant (is_gimple_ip_invariant)is passed as an actual
  44                   argument.
  45    Unknown      - neither of the above.
  46
  47    IPA_JF_ANCESTOR is a special pass-through jump function, which means that
  48    the result is an address of a part of the object pointed to by the formal
  49    parameter to which the function refers.  It is mainly intended to represent
  50    getting addresses of of ancestor fields in C++
  51    (e.g. &this_1(D)->D.1766.D.1756).  Note that if the original pointer is
  52    NULL, ancestor jump function must behave like a simple pass-through.
  53
  54    Other pass-through functions can either simply pass on an unchanged formal
  55    parameter or can apply one simple binary operation to it (such jump
  56    functions are called polynomial).
  57
  58    IPA_JF_KNOWN_TYPE is a special type of an "unknown" function that applies
  59    only to pointer parameters.  It means that even though we cannot prove that
  60    the passed value is an interprocedural constant, we still know the exact
  61    type of the containing object which may be valuable for devirtualization.
  62
  63    Jump functions are computed in ipa-prop.c by function
  64    update_call_notes_after_inlining.  Some information can be lost and jump
  65    functions degraded accordingly when inlining, see
  66    update_call_notes_after_inlining in the same file.  */
  67
  68 enum jump_func_type
  69 {
  70   IPA_JF_UNKNOWN = 0,  /* newly allocated and zeroed jump functions default */
  71   IPA_JF_KNOWN_TYPE,        /* represented by field known_type */
  72   IPA_JF_CONST,             /* represented by field costant */
  73   IPA_JF_PASS_THROUGH,      /* represented by field pass_through */
  74   IPA_JF_ANCESTOR           /* represented by field ancestor */
  75 };
  76
  77 /* Structure holding data required to describe a known type jump function.  */
  78 struct GTY(()) ipa_known_type_data
  79 {
  80   /* Offset of the component of the base_type being described.  */
  81   HOST_WIDE_INT offset;
  82   /* Type of the whole object.  */
  83   tree base_type;
  84   /* Type of the component of the object that is being described.  */
  85   tree component_type;
  86 };
  87
  88 /* Structure holding data required to describe a pass-through jump function.  */
  89
  90 struct GTY(()) ipa_pass_through_data
  91 {
  92   /* If an operation is to be performed on the original parameter, this is the
  93      second (constant) operand.  */
  94   tree operand;
  95   /* Number of the caller's formal parameter being passed.  */
  96   int formal_id;
  97   /* Operation that is performed on the argument before it is passed on.
  98      NOP_EXPR means no operation.  Otherwise oper must be a simple binary
  99      arithmetic operation where the caller's parameter is the first operand and
 100      operand field from this structure is the second one.  */
 101   enum tree_code operation;
 102   /* When the passed value is a pointer, it is set to true only when we are
 103      certain that no write to the object it points to has occurred since the
 104      caller functions started execution, except for changes noted in the
 105      aggregate part of the jump function (see description of
 106      ipa_agg_jump_function).  The flag is used only when the operation is
 107      NOP_EXPR.  */
 108   bool agg_preserved;
 109 };
 110
 111 /* Structure holding data required to describe an ancestor pass-through
 112    jump function.  */
 113
 114 struct GTY(()) ipa_ancestor_jf_data
 115 {
 116   /* Offset of the field representing the ancestor.  */
 117   HOST_WIDE_INT offset;
 118   /* Type of the result.  */
 119   tree type;
 120   /* Number of the caller's formal parameter being passed.  */
 121   int formal_id;
 122   /* Flag with the same meaning like agg_preserve in ipa_pass_through_data.  */
 123   bool agg_preserved;
 124 };
 125
 126 /* An element in an aggegate part of a jump function describing a known value
 127    at a given offset.  When it is part of a pass-through jump function with
 128    agg_preserved set or an ancestor jump function with agg_preserved set, all
 129    unlisted positions are assumed to be preserved but the value can be a type
 130    node, which means that the particular piece (starting at offset and having
 131    the size of the type) is clobbered with an unknown value.  When
 132    agg_preserved is false or the type of the containing jump function is
 133    different, all unlisted parts are assumed to be unknown and all values must
 134    fullfill is_gimple_ip_invariant.  */
 135
 136 typedef struct GTY(()) ipa_agg_jf_item
 137 {
 138   /* The offset at which the known value is located within the aggregate.  */
 139   HOST_WIDE_INT offset;
 140
 141   /* The known constant or type if this is a clobber.  */
 142   tree value;
 143 } ipa_agg_jf_item_t;
 144
 145 DEF_VEC_O (ipa_agg_jf_item_t);
 146 DEF_VEC_ALLOC_O (ipa_agg_jf_item_t, gc);
 147
 148 /* Aggregate jump function - i.e. description of contents of aggregates passed
 149    either by reference or value.  */
 150
 151 struct GTY(()) ipa_agg_jump_function
 152 {
 153   /* Description of the individual items.  */
 154   VEC (ipa_agg_jf_item_t, gc) *items;
 155   /* True if the data was passed by reference (as opposed to by value). */
 156   bool by_ref;
 157 };
 158
 159 typedef struct ipa_agg_jump_function *ipa_agg_jump_function_p;
 160 DEF_VEC_P (ipa_agg_jump_function_p);
 161 DEF_VEC_ALLOC_P (ipa_agg_jump_function_p, heap);
 162
 163 /* A jump function for a callsite represents the values passed as actual
 164    arguments of the callsite. See enum jump_func_type for the various
 165    types of jump functions supported.  */
 166 typedef struct GTY (()) ipa_jump_func
 167 {
 168   /* Aggregate contants description.  See struct ipa_agg_jump_function and its
 169      description.  */
 170   struct ipa_agg_jump_function agg;
 171
 172   enum jump_func_type type;
 173   /* Represents a value of a jump function.  pass_through is used only in jump
 174      function context.  constant represents the actual constant in constant jump
 175      functions and member_cst holds constant c++ member functions.  */
 176   union jump_func_value
 177   {
 178     struct ipa_known_type_data GTY ((tag ("IPA_JF_KNOWN_TYPE"))) known_type;
 179     tree GTY ((tag ("IPA_JF_CONST"))) constant;
 180     struct ipa_pass_through_data GTY ((tag ("IPA_JF_PASS_THROUGH"))) pass_through;
 181     struct ipa_ancestor_jf_data GTY ((tag ("IPA_JF_ANCESTOR"))) ancestor;
 182   } GTY ((desc ("%1.type"))) value;
 183 } ipa_jump_func_t;
 184
 185 DEF_VEC_O (ipa_jump_func_t);
 186 DEF_VEC_ALLOC_O (ipa_jump_func_t, gc);
 187
 188 /* Return the offset of the component that is decribed by a known type jump
 189    function JFUNC.  */
 190
 191 static inline HOST_WIDE_INT
 192 ipa_get_jf_known_type_offset (struct ipa_jump_func *jfunc)
 193 {
 194   gcc_checking_assert (jfunc->type == IPA_JF_KNOWN_TYPE);
 195   return jfunc->value.known_type.offset;
 196 }
 197
 198 /* Return the base type of a known type jump function JFUNC.  */
 199
 200 static inline tree
 201 ipa_get_jf_known_type_base_type (struct ipa_jump_func *jfunc)
 202 {
 203   gcc_checking_assert (jfunc->type == IPA_JF_KNOWN_TYPE);
 204   return jfunc->value.known_type.base_type;
 205 }
 206
 207 /* Return the component type of a known type jump function JFUNC.  */
 208
 209 static inline tree
 210 ipa_get_jf_known_type_component_type (struct ipa_jump_func *jfunc)
 211 {
 212   gcc_checking_assert (jfunc->type == IPA_JF_KNOWN_TYPE);
 213   return jfunc->value.known_type.component_type;
 214 }
 215
 216 /* Return the constant stored in a constant jump functin JFUNC.  */
 217
 218 static inline tree
 219 ipa_get_jf_constant (struct ipa_jump_func *jfunc)
 220 {
 221   gcc_checking_assert (jfunc->type == IPA_JF_CONST);
 222   return jfunc->value.constant;
 223 }
 224
 225 /* Return the operand of a pass through jmp function JFUNC.  */
 226
 227 static inline tree
 228 ipa_get_jf_pass_through_operand (struct ipa_jump_func *jfunc)
 229 {
 230   gcc_checking_assert (jfunc->type == IPA_JF_PASS_THROUGH);
 231   return jfunc->value.pass_through.operand;
 232 }
 233
 234 /* Return the number of the caller's formal parameter that a pass through jump
 235    function JFUNC refers to.  */
 236
 237 static inline int
 238 ipa_get_jf_pass_through_formal_id (struct ipa_jump_func *jfunc)
 239 {
 240   gcc_checking_assert (jfunc->type == IPA_JF_PASS_THROUGH);
 241   return jfunc->value.pass_through.formal_id;
 242 }
 243
 244 /* Return operation of a pass through jump function JFUNC.  */
 245
 246 static inline enum tree_code
 247 ipa_get_jf_pass_through_operation (struct ipa_jump_func *jfunc)
 248 {
 249   gcc_checking_assert (jfunc->type == IPA_JF_PASS_THROUGH);
 250   return jfunc->value.pass_through.operation;
 251 }
 252
 253 /* Return the agg_preserved flag of a pass through jump functin JFUNC.  */
 254
 255 static inline bool
 256 ipa_get_jf_pass_through_agg_preserved (struct ipa_jump_func *jfunc)
 257 {
 258   gcc_checking_assert (jfunc->type == IPA_JF_PASS_THROUGH);
 259   return jfunc->value.pass_through.agg_preserved;
 260 }
 261
 262 /* Return the offset of an ancestor jump function JFUNC.  */
 263
 264 static inline HOST_WIDE_INT
 265 ipa_get_jf_ancestor_offset (struct ipa_jump_func *jfunc)
 266 {
 267   gcc_checking_assert (jfunc->type == IPA_JF_ANCESTOR);
 268   return jfunc->value.ancestor.offset;
 269 }
 270
 271 /* Return the result type of an ancestor jump function JFUNC.  */
 272
 273 static inline tree
 274 ipa_get_jf_ancestor_type (struct ipa_jump_func *jfunc)
 275 {
 276   gcc_checking_assert (jfunc->type == IPA_JF_ANCESTOR);
 277   return jfunc->value.ancestor.type;
 278 }
 279
 280 /* Return the number of the caller's formal parameter that an ancestor jump
 281    function JFUNC refers to.  */
 282
 283 static inline int
 284 ipa_get_jf_ancestor_formal_id (struct ipa_jump_func *jfunc)
 285 {
 286   gcc_checking_assert (jfunc->type == IPA_JF_ANCESTOR);
 287   return jfunc->value.ancestor.formal_id;
 288 }
 289
 290 /* Return the agg_preserved flag of an ancestor jump functin JFUNC.  */
 291
 292 static inline bool
 293 ipa_get_jf_ancestor_agg_preserved (struct ipa_jump_func *jfunc)
 294 {
 295   gcc_checking_assert (jfunc->type == IPA_JF_ANCESTOR);
 296   return jfunc->value.ancestor.agg_preserved;
 297 }
 298
 299 /* Summary describing a single formal parameter.  */
 300
 301 struct ipa_param_descriptor
 302 {
 303   /* PARAM_DECL of this parameter.  */
 304   tree decl;
 305   /* The parameter is used.  */
 306   unsigned used : 1;
 307 };
 308
 309 typedef struct ipa_param_descriptor ipa_param_descriptor_t;
 310 DEF_VEC_O (ipa_param_descriptor_t);
 311 DEF_VEC_ALLOC_O (ipa_param_descriptor_t, heap);
 312 struct ipcp_lattice;
 313
 314 /* ipa_node_params stores information related to formal parameters of functions
 315    and some other information for interprocedural passes that operate on
 316    parameters (such as ipa-cp).  */
 317
 318 struct ipa_node_params
 319 {
 320   /* Information about individual formal parameters that are gathered when
 321      summaries are generated. */
 322   VEC (ipa_param_descriptor_t, heap) *descriptors;
 323   /* Pointer to an array of structures describing individual formal
 324      parameters.  */
 325   struct ipcp_lattice *lattices;
 326   /* Only for versioned nodes this field would not be NULL,
 327      it points to the node that IPA cp cloned from.  */
 328   struct cgraph_node *ipcp_orig_node;
 329   /* If this node is an ipa-cp clone, these are the known values that describe
 330      what it has been specialized for.  */
 331   VEC (tree, heap) *known_vals;
 332   /* Whether the param uses analysis has already been performed.  */
 333   unsigned uses_analysis_done : 1;
 334   /* Whether the function is enqueued in ipa-cp propagation stack.  */
 335   unsigned node_enqueued : 1;
 336   /* Whether we should create a specialized version based on values that are
 337      known to be constant in all contexts.  */
 338   unsigned clone_for_all_contexts : 1;
 339   /* Node has been completely replaced by clones and will be removed after
 340      ipa-cp is finished.  */
 341   unsigned node_dead : 1;
 342 };
 343
 344 /* ipa_node_params access functions.  Please use these to access fields that
 345    are or will be shared among various passes.  */
 346
 347 /* Return the number of formal parameters. */
 348
 349 static inline int
 350 ipa_get_param_count (struct ipa_node_params *info)
 351 {
 352   return VEC_length (ipa_param_descriptor_t, info->descriptors);
 353 }
 354
 355 /* Return the declaration of Ith formal parameter of the function corresponding
 356    to INFO.  Note there is no setter function as this array is built just once
 357    using ipa_initialize_node_params. */
 358
 359 static inline tree
 360 ipa_get_param (struct ipa_node_params *info, int i)
 361 {
 362   return VEC_index (ipa_param_descriptor_t, info->descriptors, i).decl;
 363 }
 364
 365 /* Set the used flag corresponding to the Ith formal parameter of the function
 366    associated with INFO to VAL.  */
 367
 368 static inline void
 369 ipa_set_param_used (struct ipa_node_params *info, int i, bool val)
 370 {
 371   VEC_index (ipa_param_descriptor_t, info->descriptors, i).used = val;
 372 }
 373
 374 /* Return the used flag corresponding to the Ith formal parameter of the
 375    function associated with INFO.  */
 376
 377 static inline bool
 378 ipa_is_param_used (struct ipa_node_params *info, int i)
 379 {
 380   return VEC_index (ipa_param_descriptor_t, info->descriptors, i).used;
 381 }
 382
 383 /* ipa_edge_args stores information related to a callsite and particularly its
 384    arguments.  It can be accessed by the IPA_EDGE_REF macro.  */
 385 typedef struct GTY(()) ipa_edge_args
 386 {
 387   /* Vector of the callsite's jump function of each parameter.  */
 388   VEC (ipa_jump_func_t, gc) *jump_functions;
 389 } ipa_edge_args_t;
 390
 391 /* ipa_edge_args access functions.  Please use these to access fields that
 392    are or will be shared among various passes.  */
 393
 394 /* Return the number of actual arguments. */
 395
 396 static inline int
 397 ipa_get_cs_argument_count (struct ipa_edge_args *args)
 398 {
 399   return VEC_length (ipa_jump_func_t, args->jump_functions);
 400 }
 401
 402 /* Returns a pointer to the jump function for the ith argument.  Please note
 403    there is no setter function as jump functions are all set up in
 404    ipa_compute_jump_functions. */
 405
 406 static inline struct ipa_jump_func *
 407 ipa_get_ith_jump_func (struct ipa_edge_args *args, int i)
 408 {
 409   return &VEC_index (ipa_jump_func_t, args->jump_functions, i);
 410 }
 411
 412 /* Vectors need to have typedefs of structures.  */
 413 typedef struct ipa_node_params ipa_node_params_t;
 414
 415 /* Types of vectors holding the infos.  */
 416 DEF_VEC_O (ipa_node_params_t);
 417 DEF_VEC_ALLOC_O (ipa_node_params_t, heap);
 418 DEF_VEC_O (ipa_edge_args_t);
 419 DEF_VEC_ALLOC_O (ipa_edge_args_t, gc);
 420
 421 /* Vector where the parameter infos are actually stored. */
 422 extern VEC (ipa_node_params_t, heap) *ipa_node_params_vector;
 423 /* Vector where the parameter infos are actually stored. */
 424 extern GTY(()) VEC (ipa_edge_args_t, gc) *ipa_edge_args_vector;
 425
 426 /* Return the associated parameter/argument info corresponding to the given
 427    node/edge.  */
 428 #define IPA_NODE_REF(NODE) (&VEC_index (ipa_node_params_t, \
 429                                         ipa_node_params_vector, (NODE)->uid))
 430 #define IPA_EDGE_REF(EDGE) (&VEC_index (ipa_edge_args_t, \
 431                                         ipa_edge_args_vector, (EDGE)->uid))
 432 /* This macro checks validity of index returned by
 433    ipa_get_param_decl_index function.  */
 434 #define IS_VALID_JUMP_FUNC_INDEX(I) ((I) != -1)
 435
 436 /* Creating and freeing ipa_node_params and ipa_edge_args.  */
 437 void ipa_create_all_node_params (void);
 438 void ipa_create_all_edge_args (void);
 439 void ipa_free_edge_args_substructures (struct ipa_edge_args *);
 440 void ipa_free_node_params_substructures (struct ipa_node_params *);
 441 void ipa_free_all_node_params (void);
 442 void ipa_free_all_edge_args (void);
 443 void ipa_free_all_structures_after_ipa_cp (void);
 444 void ipa_free_all_structures_after_iinln (void);
 445 void ipa_register_cgraph_hooks (void);
 446
 447 /* This function ensures the array of node param infos is big enough to
 448    accommodate a structure for all nodes and reallocates it if not.  */
 449
 450 static inline void
 451 ipa_check_create_node_params (void)
 452 {
 453   if (!ipa_node_params_vector)
 454     ipa_node_params_vector = VEC_alloc (ipa_node_params_t, heap,
 455                                         cgraph_max_uid);
 456
 457   if (VEC_length (ipa_node_params_t, ipa_node_params_vector)
 458       <= (unsigned) cgraph_max_uid)
 459     VEC_safe_grow_cleared (ipa_node_params_t, heap,
 460                            ipa_node_params_vector, cgraph_max_uid + 1);
 461 }
 462
 463 /* This function ensures the array of edge arguments infos is big enough to
 464    accommodate a structure for all edges and reallocates it if not.  */
 465
 466 static inline void
 467 ipa_check_create_edge_args (void)
 468 {
 469   if (!ipa_edge_args_vector)
 470     ipa_edge_args_vector = VEC_alloc (ipa_edge_args_t, gc,
 471                                       cgraph_edge_max_uid);
 472
 473   if (VEC_length (ipa_edge_args_t, ipa_edge_args_vector)
 474       <=  (unsigned) cgraph_edge_max_uid)
 475     VEC_safe_grow_cleared (ipa_edge_args_t, gc, ipa_edge_args_vector,
 476                            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_length (ipa_edge_args_t,
 487                                              ipa_edge_args_vector));
 488 }
 489
 490 /* Function formal parameters related computations.  */
 491 void ipa_initialize_node_params (struct cgraph_node *node);
 492 bool ipa_propagate_indirect_call_infos (struct cgraph_edge *cs,
 493                                         VEC (cgraph_edge_p, heap) **new_edges);
 494
 495 /* Indirect edge and binfo processing.  */
 496 tree ipa_get_indirect_edge_target (struct cgraph_edge *ie,
 497                                    VEC (tree, heap) *,
 498                                    VEC (tree, heap) *,
 499                                    VEC (ipa_agg_jump_function_p, heap) *);
 500 struct cgraph_edge *ipa_make_edge_direct_to_target (struct cgraph_edge *, tree);
 501
 502 /* Functions related to both.  */
 503 void ipa_analyze_node (struct cgraph_node *);
 504
 505 /* Aggregate jump function related functions.  */
 506 tree ipa_find_agg_cst_for_param (struct ipa_agg_jump_function *, HOST_WIDE_INT,
 507                                  bool);
 508 bool ipa_load_from_parm_agg (struct ipa_node_params *, gimple, tree, int *,
 509                              HOST_WIDE_INT *, bool *);
 510
 511 /* Debugging interface.  */
 512 void ipa_print_node_params (FILE *, struct cgraph_node *node);
 513 void ipa_print_all_params (FILE *);
 514 void ipa_print_node_jump_functions (FILE *f, struct cgraph_node *node);
 515 void ipa_print_all_jump_functions (FILE * f);
 516 void ipcp_verify_propagated_values (void);
 517
 518 extern alloc_pool ipcp_values_pool;
 519 extern alloc_pool ipcp_sources_pool;
 520
 521 /* Structure to describe transformations of formal parameters and actual
 522    arguments.  Each instance describes one new parameter and they are meant to
 523    be stored in a vector.  Additionally, most users will probably want to store
 524    adjustments about parameters that are being removed altogether so that SSA
 525    names belonging to them can be replaced by SSA names of an artificial
 526    variable.  */
 527 struct ipa_parm_adjustment
 528 {
 529   /* The original PARM_DECL itself, helpful for processing of the body of the
 530      function itself.  Intended for traversing function bodies.
 531      ipa_modify_formal_parameters, ipa_modify_call_arguments and
 532      ipa_combine_adjustments ignore this and use base_index.
 533      ipa_modify_formal_parameters actually sets this.  */
 534   tree base;
 535
 536   /* Type of the new parameter.  However, if by_ref is true, the real type will
 537      be a pointer to this type.  */
 538   tree type;
 539
 540   /* Alias refrerence type to be used in MEM_REFs when adjusting caller
 541      arguments.  */
 542   tree alias_ptr_type;
 543
 544   /* The new declaration when creating/replacing a parameter.  Created by
 545      ipa_modify_formal_parameters, useful for functions modifying the body
 546      accordingly. */
 547   tree reduction;
 548
 549   /* New declaration of a substitute variable that we may use to replace all
 550      non-default-def ssa names when a parm decl is going away.  */
 551   tree new_ssa_base;
 552
 553   /* If non-NULL and the original parameter is to be removed (copy_param below
 554      is NULL), this is going to be its nonlocalized vars value.  */
 555   tree nonlocal_value;
 556
 557   /* Offset into the original parameter (for the cases when the new parameter
 558      is a component of an original one).  */
 559   HOST_WIDE_INT offset;
 560
 561   /* Zero based index of the original parameter this one is based on.  (ATM
 562      there is no way to insert a new parameter out of the blue because there is
 563      no need but if it arises the code can be easily exteded to do so.)  */
 564   int base_index;
 565
 566   /* This new parameter is an unmodified parameter at index base_index. */
 567   unsigned copy_param : 1;
 568
 569   /* This adjustment describes a parameter that is about to be removed
 570      completely.  Most users will probably need to book keep those so that they
 571      don't leave behinfd any non default def ssa names belonging to them.  */
 572   unsigned remove_param : 1;
 573
 574   /* The parameter is to be passed by reference.  */
 575   unsigned by_ref : 1;
 576 };
 577
 578 typedef struct ipa_parm_adjustment ipa_parm_adjustment_t;
 579 DEF_VEC_O (ipa_parm_adjustment_t);
 580 DEF_VEC_ALLOC_O (ipa_parm_adjustment_t, heap);
 581
 582 typedef VEC (ipa_parm_adjustment_t, heap) *ipa_parm_adjustment_vec;
 583
 584 VEC(tree, heap) *ipa_get_vector_of_formal_parms (tree fndecl);
 585 void ipa_modify_formal_parameters (tree fndecl, ipa_parm_adjustment_vec,
 586                                    const char *);
 587 void ipa_modify_call_arguments (struct cgraph_edge *, gimple,
 588                                 ipa_parm_adjustment_vec);
 589 ipa_parm_adjustment_vec ipa_combine_adjustments (ipa_parm_adjustment_vec,
 590                                                  ipa_parm_adjustment_vec);
 591 void ipa_dump_param_adjustments (FILE *, ipa_parm_adjustment_vec, tree);
 592
 593 void ipa_prop_write_jump_functions (void);
 594 void ipa_prop_read_jump_functions (void);
 595 void ipa_update_after_lto_read (void);
 596 int ipa_get_param_decl_index (struct ipa_node_params *, tree);
 597 tree ipa_value_from_jfunc (struct ipa_node_params *info,
 598                            struct ipa_jump_func *jfunc);
 599
 600
 601 /* From tree-sra.c:  */
 602 tree build_ref_for_offset (location_t, tree, HOST_WIDE_INT, tree,
 603                            gimple_stmt_iterator *, bool);
 604
 605 #endif /* IPA_PROP_H */