gcc/c-family/c-pretty-print.c

   1 /* Subroutines common to both C and C++ pretty-printers.
   2    Copyright (C) 2002-2013 Free Software Foundation, Inc.
   3    Contributed by Gabriel Dos Reis <gdr@integrable-solutions.net>
   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 #include "config.h"
  22 #include "system.h"
  23 #include "coretypes.h"
  24 #include "tm.h"
  25 #include "tree.h"
  26 #include "intl.h"
  27 #include "c-pretty-print.h"
  28 #include "tree-pretty-print.h"
  29 #include "tree-iterator.h"
  30 #include "diagnostic.h"
  31
  32 /* Translate if being used for diagnostics, but not for dump files or
  33    __PRETTY_FUNCTION.  */
  34 #define M_(msgid) (pp_translate_identifiers (pp) ? _(msgid) : (msgid))
  35
  36 /* The pretty-printer code is primarily designed to closely follow
  37    (GNU) C and C++ grammars.  That is to be contrasted with spaghetti
  38    codes we used to have in the past.  Following a structured
  39    approach (preferably the official grammars) is believed to make it
  40    much easier to add extensions and nifty pretty-printing effects that
  41    takes expression or declaration contexts into account.  */
  42
  43
  44 #define pp_c_maybe_whitespace(PP)            \
  45    do {                                      \
  46      if (pp_base (PP)->padding == pp_before) \
  47        pp_c_whitespace (PP);                 \
  48    } while (0)
  49
  50 /* literal  */
  51 static void pp_c_char (c_pretty_printer *, int);
  52
  53 /* postfix-expression  */
  54 static void pp_c_initializer_list (c_pretty_printer *, tree);
  55 static void pp_c_brace_enclosed_initializer_list (c_pretty_printer *, tree);
  56
  57 static void pp_c_multiplicative_expression (c_pretty_printer *, tree);
  58 static void pp_c_additive_expression (c_pretty_printer *, tree);
  59 static void pp_c_shift_expression (c_pretty_printer *, tree);
  60 static void pp_c_relational_expression (c_pretty_printer *, tree);
  61 static void pp_c_equality_expression (c_pretty_printer *, tree);
  62 static void pp_c_and_expression (c_pretty_printer *, tree);
  63 static void pp_c_exclusive_or_expression (c_pretty_printer *, tree);
  64 static void pp_c_inclusive_or_expression (c_pretty_printer *, tree);
  65 static void pp_c_logical_and_expression (c_pretty_printer *, tree);
  66 static void pp_c_conditional_expression (c_pretty_printer *, tree);
  67 static void pp_c_assignment_expression (c_pretty_printer *, tree);
  68
  69 /* declarations.  */
  70
  71 \f
  72 /* Helper functions.  */
  73
  74 void
  75 pp_c_whitespace (c_pretty_printer *pp)
  76 {
  77   pp_space (pp);
  78   pp_base (pp)->padding = pp_none;
  79 }
  80
  81 void
  82 pp_c_left_paren (c_pretty_printer *pp)
  83 {
  84   pp_left_paren (pp);
  85   pp_base (pp)->padding = pp_none;
  86 }
  87
  88 void
  89 pp_c_right_paren (c_pretty_printer *pp)
  90 {
  91   pp_right_paren (pp);
  92   pp_base (pp)->padding = pp_none;
  93 }
  94
  95 void
  96 pp_c_left_brace (c_pretty_printer *pp)
  97 {
  98   pp_left_brace (pp);
  99   pp_base (pp)->padding = pp_none;
 100 }
 101
 102 void
 103 pp_c_right_brace (c_pretty_printer *pp)
 104 {
 105   pp_right_brace (pp);
 106   pp_base (pp)->padding = pp_none;
 107 }
 108
 109 void
 110 pp_c_left_bracket (c_pretty_printer *pp)
 111 {
 112   pp_left_bracket (pp);
 113   pp_base (pp)->padding = pp_none;
 114 }
 115
 116 void
 117 pp_c_right_bracket (c_pretty_printer *pp)
 118 {
 119   pp_right_bracket (pp);
 120   pp_base (pp)->padding = pp_none;
 121 }
 122
 123 void
 124 pp_c_dot (c_pretty_printer *pp)
 125 {
 126   pp_dot (pp);
 127   pp_base (pp)->padding = pp_none;
 128 }
 129
 130 void
 131 pp_c_ampersand (c_pretty_printer *pp)
 132 {
 133   pp_ampersand (pp);
 134   pp_base (pp)->padding = pp_none;
 135 }
 136
 137 void
 138 pp_c_star (c_pretty_printer *pp)
 139 {
 140   pp_star (pp);
 141   pp_base (pp)->padding = pp_none;
 142 }
 143
 144 void
 145 pp_c_arrow (c_pretty_printer *pp)
 146 {
 147   pp_arrow (pp);
 148   pp_base (pp)->padding = pp_none;
 149 }
 150
 151 void
 152 pp_c_semicolon (c_pretty_printer *pp)
 153 {
 154   pp_semicolon (pp);
 155   pp_base (pp)->padding = pp_none;
 156 }
 157
 158 void
 159 pp_c_complement (c_pretty_printer *pp)
 160 {
 161   pp_complement (pp);
 162   pp_base (pp)->padding = pp_none;
 163 }
 164
 165 void
 166 pp_c_exclamation (c_pretty_printer *pp)
 167 {
 168   pp_exclamation (pp);
 169   pp_base (pp)->padding = pp_none;
 170 }
 171
 172 /* Print out the external representation of QUALIFIERS.  */
 173
 174 void
 175 pp_c_cv_qualifiers (c_pretty_printer *pp, int qualifiers, bool func_type)
 176 {
 177   const char *p = pp_last_position_in_text (pp);
 178   bool previous = false;
 179
 180   if (!qualifiers)
 181     return;
 182
 183   /* The C programming language does not have references, but it is much
 184      simpler to handle those here rather than going through the same
 185      logic in the C++ pretty-printer.  */
 186   if (p != NULL && (*p == '*' || *p == '&'))
 187     pp_c_whitespace (pp);
 188
 189   if (qualifiers & TYPE_QUAL_CONST)
 190     {
 191       pp_c_ws_string (pp, func_type ? "__attribute__((const))" : "const");
 192       previous = true;
 193     }
 194
 195   if (qualifiers & TYPE_QUAL_VOLATILE)
 196     {
 197       if (previous)
 198         pp_c_whitespace (pp);
 199       pp_c_ws_string (pp, func_type ? "__attribute__((noreturn))" : "volatile");
 200       previous = true;
 201     }
 202
 203   if (qualifiers & TYPE_QUAL_RESTRICT)
 204     {
 205       if (previous)
 206         pp_c_whitespace (pp);
 207       pp_c_ws_string (pp, (flag_isoc99 && !c_dialect_cxx ()
 208                            ? "restrict" : "__restrict__"));
 209     }
 210 }
 211
 212 /* Pretty-print T using the type-cast notation '( type-name )'.  */
 213
 214 static void
 215 pp_c_type_cast (c_pretty_printer *pp, tree t)
 216 {
 217   pp_c_left_paren (pp);
 218   pp_type_id (pp, t);
 219   pp_c_right_paren (pp);
 220 }
 221
 222 /* We're about to pretty-print a pointer type as indicated by T.
 223    Output a whitespace, if needed, preparing for subsequent output.  */
 224
 225 void
 226 pp_c_space_for_pointer_operator (c_pretty_printer *pp, tree t)
 227 {
 228   if (POINTER_TYPE_P (t))
 229     {
 230       tree pointee = strip_pointer_operator (TREE_TYPE (t));
 231       if (TREE_CODE (pointee) != ARRAY_TYPE
 232           && TREE_CODE (pointee) != FUNCTION_TYPE)
 233         pp_c_whitespace (pp);
 234     }
 235 }
 236
 237 \f
 238 /* Declarations.  */
 239
 240 /* C++ cv-qualifiers are called type-qualifiers in C.  Print out the
 241    cv-qualifiers of T.  If T is a declaration then it is the cv-qualifier
 242    of its type.  Take care of possible extensions.
 243
 244    type-qualifier-list:
 245        type-qualifier
 246        type-qualifier-list type-qualifier
 247
 248    type-qualifier:
 249        const
 250        restrict                              -- C99
 251        __restrict__                          -- GNU C
 252        address-space-qualifier               -- GNU C
 253        volatile
 254
 255    address-space-qualifier:
 256        identifier                            -- GNU C  */
 257
 258 void
 259 pp_c_type_qualifier_list (c_pretty_printer *pp, tree t)
 260 {
 261   int qualifiers;
 262
 263   if (!t || t == error_mark_node)
 264     return;
 265
 266   if (!TYPE_P (t))
 267     t = TREE_TYPE (t);
 268
 269   qualifiers = TYPE_QUALS (t);
 270   pp_c_cv_qualifiers (pp, qualifiers,
 271                       TREE_CODE (t) == FUNCTION_TYPE);
 272
 273   if (!ADDR_SPACE_GENERIC_P (TYPE_ADDR_SPACE (t)))
 274     {
 275       const char *as = c_addr_space_name (TYPE_ADDR_SPACE (t));
 276       pp_c_identifier (pp, as);
 277     }
 278 }
 279
 280 /* pointer:
 281       * type-qualifier-list(opt)
 282       * type-qualifier-list(opt) pointer  */
 283
 284 static void
 285 pp_c_pointer (c_pretty_printer *pp, tree t)
 286 {
 287   if (!TYPE_P (t) && TREE_CODE (t) != TYPE_DECL)
 288     t = TREE_TYPE (t);
 289   switch (TREE_CODE (t))
 290     {
 291     case POINTER_TYPE:
 292       /* It is easier to handle C++ reference types here.  */
 293     case REFERENCE_TYPE:
 294       if (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE)
 295         pp_c_pointer (pp, TREE_TYPE (t));
 296       if (TREE_CODE (t) == POINTER_TYPE)
 297         pp_c_star (pp);
 298       else
 299         pp_c_ampersand (pp);
 300       pp_c_type_qualifier_list (pp, t);
 301       break;
 302
 303       /* ??? This node is now in GENERIC and so shouldn't be here.  But
 304          we'll fix that later.  */
 305     case DECL_EXPR:
 306       pp_declaration (pp, DECL_EXPR_DECL (t));
 307       pp_needs_newline (pp) = true;
 308       break;
 309
 310     default:
 311       pp_unsupported_tree (pp, t);
 312     }
 313 }
 314
 315 /* type-specifier:
 316       void
 317       char
 318       short
 319       int
 320       long
 321       float
 322       double
 323       signed
 324       unsigned
 325       _Bool                          -- C99
 326       _Complex                       -- C99
 327       _Imaginary                     -- C99
 328       struct-or-union-specifier
 329       enum-specifier
 330       typedef-name.
 331
 332   GNU extensions.
 333   simple-type-specifier:
 334       __complex__
 335       __vector__   */
 336
 337 void
 338 pp_c_type_specifier (c_pretty_printer *pp, tree t)
 339 {
 340   const enum tree_code code = TREE_CODE (t);
 341   switch (code)
 342     {
 343     case ERROR_MARK:
 344       pp_c_ws_string (pp, M_("<type-error>"));
 345       break;
 346
 347     case IDENTIFIER_NODE:
 348       pp_c_identifier (pp, IDENTIFIER_POINTER (t));
 349       break;
 350
 351     case VOID_TYPE:
 352     case BOOLEAN_TYPE:
 353     case INTEGER_TYPE:
 354     case REAL_TYPE:
 355     case FIXED_POINT_TYPE:
 356       if (TYPE_NAME (t))
 357         {
 358           t = TYPE_NAME (t);
 359           pp_c_type_specifier (pp, t);
 360         }
 361       else
 362         {
 363           int prec = TYPE_PRECISION (t);
 364           if (ALL_FIXED_POINT_MODE_P (TYPE_MODE (t)))
 365             t = c_common_type_for_mode (TYPE_MODE (t), TYPE_SATURATING (t));
 366           else
 367             t = c_common_type_for_mode (TYPE_MODE (t), TYPE_UNSIGNED (t));
 368           if (TYPE_NAME (t))
 369             {
 370               pp_c_type_specifier (pp, t);
 371               if (TYPE_PRECISION (t) != prec)
 372                 {
 373                   pp_string (pp, ":");
 374                   pp_decimal_int (pp, prec);
 375                 }
 376             }
 377           else
 378             {
 379               switch (code)
 380                 {
 381                 case INTEGER_TYPE:
 382                   pp_string (pp, (TYPE_UNSIGNED (t)
 383                                   ? M_("<unnamed-unsigned:")
 384                                   : M_("<unnamed-signed:")));
 385                   break;
 386                 case REAL_TYPE:
 387                   pp_string (pp, M_("<unnamed-float:"));
 388                   break;
 389                 case FIXED_POINT_TYPE:
 390                   pp_string (pp, M_("<unnamed-fixed:"));
 391                   break;
 392                 default:
 393                   gcc_unreachable ();
 394                 }
 395               pp_decimal_int (pp, prec);
 396               pp_string (pp, ">");
 397             }
 398         }
 399       break;
 400
 401     case TYPE_DECL:
 402       if (DECL_NAME (t))
 403         pp_id_expression (pp, t);
 404       else
 405         pp_c_ws_string (pp, M_("<typedef-error>"));
 406       break;
 407
 408     case UNION_TYPE:
 409     case RECORD_TYPE:
 410     case ENUMERAL_TYPE:
 411       if (code == UNION_TYPE)
 412         pp_c_ws_string (pp, "union");
 413       else if (code == RECORD_TYPE)
 414         pp_c_ws_string (pp, "struct");
 415       else if (code == ENUMERAL_TYPE)
 416         pp_c_ws_string (pp, "enum");
 417       else
 418         pp_c_ws_string (pp, M_("<tag-error>"));
 419
 420       if (TYPE_NAME (t))
 421         pp_id_expression (pp, TYPE_NAME (t));
 422       else
 423         pp_c_ws_string (pp, M_("<anonymous>"));
 424       break;
 425
 426     default:
 427       pp_unsupported_tree (pp, t);
 428       break;
 429     }
 430 }
 431
 432 /* specifier-qualifier-list:
 433       type-specifier specifier-qualifier-list-opt
 434       type-qualifier specifier-qualifier-list-opt
 435
 436
 437   Implementation note:  Because of the non-linearities in array or
 438   function declarations, this routine prints not just the
 439   specifier-qualifier-list of such entities or types of such entities,
 440   but also the 'pointer' production part of their declarators.  The
 441   remaining part is done by pp_declarator or pp_c_abstract_declarator.  */
 442
 443 void
 444 pp_c_specifier_qualifier_list (c_pretty_printer *pp, tree t)
 445 {
 446   const enum tree_code code = TREE_CODE (t);
 447
 448   if (!(pp->flags & pp_c_flag_gnu_v3) && code != POINTER_TYPE)
 449     pp_c_type_qualifier_list (pp, t);
 450   switch (code)
 451     {
 452     case REFERENCE_TYPE:
 453     case POINTER_TYPE:
 454       {
 455         /* Get the types-specifier of this type.  */
 456         tree pointee = strip_pointer_operator (TREE_TYPE (t));
 457         pp_c_specifier_qualifier_list (pp, pointee);
 458         if (TREE_CODE (pointee) == ARRAY_TYPE
 459             || TREE_CODE (pointee) == FUNCTION_TYPE)
 460           {
 461             pp_c_whitespace (pp);
 462             pp_c_left_paren (pp);
 463             pp_c_attributes_display (pp, TYPE_ATTRIBUTES (pointee));
 464           }
 465         else if (!c_dialect_cxx ())
 466           pp_c_whitespace (pp);
 467         pp_ptr_operator (pp, t);
 468       }
 469       break;
 470
 471     case FUNCTION_TYPE:
 472     case ARRAY_TYPE:
 473       pp_c_specifier_qualifier_list (pp, TREE_TYPE (t));
 474       break;
 475
 476     case VECTOR_TYPE:
 477     case COMPLEX_TYPE:
 478       if (code == COMPLEX_TYPE)
 479         pp_c_ws_string (pp, (flag_isoc99 && !c_dialect_cxx ()
 480                              ? "_Complex" : "__complex__"));
 481       else if (code == VECTOR_TYPE)
 482         {
 483           pp_c_ws_string (pp, "__vector");
 484           pp_c_left_paren (pp);
 485           pp_wide_integer (pp, TYPE_VECTOR_SUBPARTS (t));
 486           pp_c_right_paren (pp);
 487           pp_c_whitespace (pp);
 488         }
 489       pp_c_specifier_qualifier_list (pp, TREE_TYPE (t));
 490       break;
 491
 492     default:
 493       pp_simple_type_specifier (pp, t);
 494       break;
 495     }
 496   if ((pp->flags & pp_c_flag_gnu_v3) && code != POINTER_TYPE)
 497     pp_c_type_qualifier_list (pp, t);
 498 }
 499
 500 /* parameter-type-list:
 501       parameter-list
 502       parameter-list , ...
 503
 504    parameter-list:
 505       parameter-declaration
 506       parameter-list , parameter-declaration
 507
 508    parameter-declaration:
 509       declaration-specifiers declarator
 510       declaration-specifiers abstract-declarator(opt)   */
 511
 512 void
 513 pp_c_parameter_type_list (c_pretty_printer *pp, tree t)
 514 {
 515   bool want_parm_decl = DECL_P (t) && !(pp->flags & pp_c_flag_abstract);
 516   tree parms = want_parm_decl ? DECL_ARGUMENTS (t) :  TYPE_ARG_TYPES (t);
 517   pp_c_left_paren (pp);
 518   if (parms == void_list_node)
 519     pp_c_ws_string (pp, "void");
 520   else
 521     {
 522       bool first = true;
 523       for ( ; parms && parms != void_list_node; parms = TREE_CHAIN (parms))
 524         {
 525           if (!first)
 526             pp_separate_with (pp, ',');
 527           first = false;
 528           pp_declaration_specifiers
 529             (pp, want_parm_decl ? parms : TREE_VALUE (parms));
 530           if (want_parm_decl)
 531             pp_declarator (pp, parms);
 532           else
 533             pp_abstract_declarator (pp, TREE_VALUE (parms));
 534         }
 535     }
 536   pp_c_right_paren (pp);
 537 }
 538
 539 /* abstract-declarator:
 540       pointer
 541       pointer(opt) direct-abstract-declarator  */
 542
 543 static void
 544 pp_c_abstract_declarator (c_pretty_printer *pp, tree t)
 545 {
 546   if (TREE_CODE (t) == POINTER_TYPE)
 547     {
 548       if (TREE_CODE (TREE_TYPE (t)) == ARRAY_TYPE
 549           || TREE_CODE (TREE_TYPE (t)) == FUNCTION_TYPE)
 550         pp_c_right_paren (pp);
 551       t = TREE_TYPE (t);
 552     }
 553
 554   pp_direct_abstract_declarator (pp, t);
 555 }
 556
 557 /* direct-abstract-declarator:
 558       ( abstract-declarator )
 559       direct-abstract-declarator(opt) [ assignment-expression(opt) ]
 560       direct-abstract-declarator(opt) [ * ]
 561       direct-abstract-declarator(opt) ( parameter-type-list(opt) )  */
 562
 563 void
 564 pp_c_direct_abstract_declarator (c_pretty_printer *pp, tree t)
 565 {
 566   switch (TREE_CODE (t))
 567     {
 568     case POINTER_TYPE:
 569       pp_abstract_declarator (pp, t);
 570       break;
 571
 572     case FUNCTION_TYPE:
 573       pp_c_parameter_type_list (pp, t);
 574       pp_direct_abstract_declarator (pp, TREE_TYPE (t));
 575       break;
 576
 577     case ARRAY_TYPE:
 578       pp_c_left_bracket (pp);
 579       if (TYPE_DOMAIN (t) && TYPE_MAX_VALUE (TYPE_DOMAIN (t)))
 580         {
 581           tree maxval = TYPE_MAX_VALUE (TYPE_DOMAIN (t));
 582           tree type = TREE_TYPE (maxval);
 583
 584           if (host_integerp (maxval, 0))
 585             pp_wide_integer (pp, tree_low_cst (maxval, 0) + 1);
 586           else
 587             pp_expression (pp, fold_build2 (PLUS_EXPR, type, maxval,
 588                                             build_int_cst (type, 1)));
 589         }
 590       pp_c_right_bracket (pp);
 591       pp_direct_abstract_declarator (pp, TREE_TYPE (t));
 592       break;
 593
 594     case IDENTIFIER_NODE:
 595     case VOID_TYPE:
 596     case BOOLEAN_TYPE:
 597     case INTEGER_TYPE:
 598     case REAL_TYPE:
 599     case FIXED_POINT_TYPE:
 600     case ENUMERAL_TYPE:
 601     case RECORD_TYPE:
 602     case UNION_TYPE:
 603     case VECTOR_TYPE:
 604     case COMPLEX_TYPE:
 605     case TYPE_DECL:
 606       break;
 607
 608     default:
 609       pp_unsupported_tree (pp, t);
 610       break;
 611     }
 612 }
 613
 614 /* type-name:
 615       specifier-qualifier-list  abstract-declarator(opt)  */
 616
 617 void
 618 pp_c_type_id (c_pretty_printer *pp, tree t)
 619 {
 620   pp_c_specifier_qualifier_list (pp, t);
 621   pp_abstract_declarator (pp, t);
 622 }
 623
 624 /* storage-class-specifier:
 625       typedef
 626       extern
 627       static
 628       auto
 629       register  */
 630
 631 void
 632 pp_c_storage_class_specifier (c_pretty_printer *pp, tree t)
 633 {
 634   if (TREE_CODE (t) == TYPE_DECL)
 635     pp_c_ws_string (pp, "typedef");
 636   else if (DECL_P (t))
 637     {
 638       if (DECL_REGISTER (t))
 639         pp_c_ws_string (pp, "register");
 640       else if (TREE_STATIC (t) && TREE_CODE (t) == VAR_DECL)
 641         pp_c_ws_string (pp, "static");
 642     }
 643 }
 644
 645 /* function-specifier:
 646       inline   */
 647
 648 void
 649 pp_c_function_specifier (c_pretty_printer *pp, tree t)
 650 {
 651   if (TREE_CODE (t) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (t))
 652     pp_c_ws_string (pp, "inline");
 653 }
 654
 655 /* declaration-specifiers:
 656       storage-class-specifier declaration-specifiers(opt)
 657       type-specifier declaration-specifiers(opt)
 658       type-qualifier declaration-specifiers(opt)
 659       function-specifier declaration-specifiers(opt)  */
 660
 661 void
 662 pp_c_declaration_specifiers (c_pretty_printer *pp, tree t)
 663 {
 664   pp_storage_class_specifier (pp, t);
 665   pp_function_specifier (pp, t);
 666   pp_c_specifier_qualifier_list (pp, DECL_P (t) ?  TREE_TYPE (t) : t);
 667 }
 668
 669 /* direct-declarator
 670       identifier
 671       ( declarator )
 672       direct-declarator [ type-qualifier-list(opt) assignment-expression(opt) ]
 673       direct-declarator [ static type-qualifier-list(opt) assignment-expression(opt)]
 674       direct-declarator [ type-qualifier-list static assignment-expression ]
 675       direct-declarator [ type-qualifier-list * ]
 676       direct-declarator ( parameter-type-list )
 677       direct-declarator ( identifier-list(opt) )  */
 678
 679 void
 680 pp_c_direct_declarator (c_pretty_printer *pp, tree t)
 681 {
 682   switch (TREE_CODE (t))
 683     {
 684     case VAR_DECL:
 685     case PARM_DECL:
 686     case TYPE_DECL:
 687     case FIELD_DECL:
 688     case LABEL_DECL:
 689       pp_c_space_for_pointer_operator (pp, TREE_TYPE (t));
 690       pp_c_tree_decl_identifier (pp, t);
 691       break;
 692
 693     case ARRAY_TYPE:
 694     case POINTER_TYPE:
 695       pp_abstract_declarator (pp, TREE_TYPE (t));
 696       break;
 697
 698     case FUNCTION_TYPE:
 699       pp_parameter_list (pp, t);
 700       pp_abstract_declarator (pp, TREE_TYPE (t));
 701       break;
 702
 703     case FUNCTION_DECL:
 704       pp_c_space_for_pointer_operator (pp, TREE_TYPE (TREE_TYPE (t)));
 705       pp_c_tree_decl_identifier (pp, t);
 706       if (pp_c_base (pp)->flags & pp_c_flag_abstract)
 707         pp_abstract_declarator (pp, TREE_TYPE (t));
 708       else
 709         {
 710           pp_parameter_list (pp, t);
 711           pp_abstract_declarator (pp, TREE_TYPE (TREE_TYPE (t)));
 712         }
 713       break;
 714
 715     case INTEGER_TYPE:
 716     case REAL_TYPE:
 717     case FIXED_POINT_TYPE:
 718     case ENUMERAL_TYPE:
 719     case UNION_TYPE:
 720     case RECORD_TYPE:
 721       break;
 722
 723     default:
 724       pp_unsupported_tree (pp, t);
 725       break;
 726     }
 727 }
 728
 729
 730 /* declarator:
 731       pointer(opt)  direct-declarator   */
 732
 733 void
 734 pp_c_declarator (c_pretty_printer *pp, tree t)
 735 {
 736   switch (TREE_CODE (t))
 737     {
 738     case INTEGER_TYPE:
 739     case REAL_TYPE:
 740     case FIXED_POINT_TYPE:
 741     case ENUMERAL_TYPE:
 742     case UNION_TYPE:
 743     case RECORD_TYPE:
 744       break;
 745
 746     case VAR_DECL:
 747     case PARM_DECL:
 748     case FIELD_DECL:
 749     case ARRAY_TYPE:
 750     case FUNCTION_TYPE:
 751     case FUNCTION_DECL:
 752     case TYPE_DECL:
 753       pp_direct_declarator (pp, t);
 754     break;
 755
 756
 757     default:
 758       pp_unsupported_tree (pp, t);
 759       break;
 760     }
 761 }
 762
 763 /* declaration:
 764       declaration-specifiers init-declarator-list(opt) ;  */
 765
 766 void
 767 pp_c_declaration (c_pretty_printer *pp, tree t)
 768 {
 769   pp_declaration_specifiers (pp, t);
 770   pp_c_init_declarator (pp, t);
 771 }
 772
 773 /* Pretty-print ATTRIBUTES using GNU C extension syntax.  */
 774
 775 void
 776 pp_c_attributes (c_pretty_printer *pp, tree attributes)
 777 {
 778   if (attributes == NULL_TREE)
 779     return;
 780
 781   pp_c_ws_string (pp, "__attribute__");
 782   pp_c_left_paren (pp);
 783   pp_c_left_paren (pp);
 784   for (; attributes != NULL_TREE; attributes = TREE_CHAIN (attributes))
 785     {
 786       pp_tree_identifier (pp, TREE_PURPOSE (attributes));
 787       if (TREE_VALUE (attributes))
 788         pp_c_call_argument_list (pp, TREE_VALUE (attributes));
 789
 790       if (TREE_CHAIN (attributes))
 791         pp_separate_with (pp, ',');
 792     }
 793   pp_c_right_paren (pp);
 794   pp_c_right_paren (pp);
 795 }
 796
 797 /* Pretty-print ATTRIBUTES using GNU C extension syntax for attributes
 798    marked to be displayed on disgnostic.  */
 799
 800 void
 801 pp_c_attributes_display (c_pretty_printer *pp, tree a)
 802 {
 803   bool is_first = true;
 804
 805   if (a == NULL_TREE)
 806     return;
 807
 808   for (; a != NULL_TREE; a = TREE_CHAIN (a))
 809     {
 810       const struct attribute_spec *as;
 811       as = lookup_attribute_spec (TREE_PURPOSE (a));
 812       if (!as || as->affects_type_identity == false)
 813         continue;
 814       if (is_first)
 815        {
 816          pp_c_ws_string (pp, "__attribute__");
 817          pp_c_left_paren (pp);
 818          pp_c_left_paren (pp);
 819          is_first = false;
 820        }
 821       else
 822        {
 823          pp_separate_with (pp, ',');
 824        }
 825       pp_tree_identifier (pp, TREE_PURPOSE (a));
 826       if (TREE_VALUE (a))
 827        pp_c_call_argument_list (pp, TREE_VALUE (a));
 828     }
 829
 830   if (!is_first)
 831     {
 832       pp_c_right_paren (pp);
 833       pp_c_right_paren (pp);
 834       pp_c_whitespace (pp);
 835     }
 836 }
 837
 838 /* function-definition:
 839       declaration-specifiers declarator compound-statement  */
 840
 841 void
 842 pp_c_function_definition (c_pretty_printer *pp, tree t)
 843 {
 844   pp_declaration_specifiers (pp, t);
 845   pp_declarator (pp, t);
 846   pp_needs_newline (pp) = true;
 847   pp_statement (pp, DECL_SAVED_TREE (t));
 848   pp_newline_and_flush (pp);
 849 }
 850
 851 \f
 852 /* Expressions.  */
 853
 854 /* Print out a c-char.  This is called solely for characters which are
 855    in the *target* execution character set.  We ought to convert them
 856    back to the *host* execution character set before printing, but we
 857    have no way to do this at present.  A decent compromise is to print
 858    all characters as if they were in the host execution character set,
 859    and not attempt to recover any named escape characters, but render
 860    all unprintables as octal escapes.  If the host and target character
 861    sets are the same, this produces relatively readable output.  If they
 862    are not the same, strings may appear as gibberish, but that's okay
 863    (in fact, it may well be what the reader wants, e.g. if they are looking
 864    to see if conversion to the target character set happened correctly).
 865
 866    A special case: we need to prefix \, ", and ' with backslashes.  It is
 867    correct to do so for the *host*'s \, ", and ', because the rest of the
 868    file appears in the host character set.  */
 869
 870 static void
 871 pp_c_char (c_pretty_printer *pp, int c)
 872 {
 873   if (ISPRINT (c))
 874     {
 875       switch (c)
 876         {
 877         case '\\': pp_string (pp, "\\\\"); break;
 878         case '\'': pp_string (pp, "\\\'"); break;
 879         case '\"': pp_string (pp, "\\\""); break;
 880         default:   pp_character (pp, c);
 881         }
 882     }
 883   else
 884     pp_scalar (pp, "\\%03o", (unsigned) c);
 885 }
 886
 887 /* Print out a STRING literal.  */
 888
 889 void
 890 pp_c_string_literal (c_pretty_printer *pp, tree s)
 891 {
 892   const char *p = TREE_STRING_POINTER (s);
 893   int n = TREE_STRING_LENGTH (s) - 1;
 894   int i;
 895   pp_doublequote (pp);
 896   for (i = 0; i < n; ++i)
 897     pp_c_char (pp, p[i]);
 898   pp_doublequote (pp);
 899 }
 900
 901 /* Pretty-print an INTEGER literal.  */
 902
 903 static void
 904 pp_c_integer_constant (c_pretty_printer *pp, tree i)
 905 {
 906   /* We are going to compare the type of I to other types using
 907      pointer comparison so we need to use its canonical type.  */
 908   tree type =
 909     TYPE_CANONICAL (TREE_TYPE (i))
 910     ? TYPE_CANONICAL (TREE_TYPE (i))
 911     : TREE_TYPE (i);
 912
 913   if (host_integerp (i, 0))
 914     pp_wide_integer (pp, TREE_INT_CST_LOW (i));
 915   else if (host_integerp (i, 1))
 916     pp_unsigned_wide_integer (pp, TREE_INT_CST_LOW (i));
 917   else
 918     {
 919       unsigned HOST_WIDE_INT low = TREE_INT_CST_LOW (i);
 920       HOST_WIDE_INT high = TREE_INT_CST_HIGH (i);
 921       if (tree_int_cst_sgn (i) < 0)
 922         {
 923           pp_character (pp, '-');
 924           high = ~high + !low;
 925           low = -low;
 926         }
 927       sprintf (pp_buffer (pp)->digit_buffer, HOST_WIDE_INT_PRINT_DOUBLE_HEX,
 928                (unsigned HOST_WIDE_INT) high, (unsigned HOST_WIDE_INT) low);
 929       pp_string (pp, pp_buffer (pp)->digit_buffer);
 930     }
 931   if (TYPE_UNSIGNED (type))
 932     pp_character (pp, 'u');
 933   if (type == long_integer_type_node || type == long_unsigned_type_node)
 934     pp_character (pp, 'l');
 935   else if (type == long_long_integer_type_node
 936            || type == long_long_unsigned_type_node)
 937     pp_string (pp, "ll");
 938   else if (type == int128_integer_type_node
 939            || type == int128_unsigned_type_node)
 940     pp_string (pp, "I128");
 941 }
 942
 943 /* Print out a CHARACTER literal.  */
 944
 945 static void
 946 pp_c_character_constant (c_pretty_printer *pp, tree c)
 947 {
 948   tree type = TREE_TYPE (c);
 949   if (type == wchar_type_node)
 950     pp_character (pp, 'L');
 951   pp_quote (pp);
 952   if (host_integerp (c, TYPE_UNSIGNED (type)))
 953     pp_c_char (pp, tree_low_cst (c, TYPE_UNSIGNED (type)));
 954   else
 955     pp_scalar (pp, "\\x%x", (unsigned) TREE_INT_CST_LOW (c));
 956   pp_quote (pp);
 957 }
 958
 959 /* Print out a BOOLEAN literal.  */
 960
 961 static void
 962 pp_c_bool_constant (c_pretty_printer *pp, tree b)
 963 {
 964   if (b == boolean_false_node)
 965     {
 966       if (c_dialect_cxx ())
 967         pp_c_ws_string (pp, "false");
 968       else if (flag_isoc99)
 969         pp_c_ws_string (pp, "_False");
 970       else
 971         pp_unsupported_tree (pp, b);
 972     }
 973   else if (b == boolean_true_node)
 974     {
 975       if (c_dialect_cxx ())
 976         pp_c_ws_string (pp, "true");
 977       else if (flag_isoc99)
 978         pp_c_ws_string (pp, "_True");
 979       else
 980         pp_unsupported_tree (pp, b);
 981     }
 982   else if (TREE_CODE (b) == INTEGER_CST)
 983     pp_c_integer_constant (pp, b);
 984   else
 985     pp_unsupported_tree (pp, b);
 986 }
 987
 988 /* Attempt to print out an ENUMERATOR.  Return true on success.  Else return
 989    false; that means the value was obtained by a cast, in which case
 990    print out the type-id part of the cast-expression -- the casted value
 991    is then printed by pp_c_integer_literal.  */
 992
 993 static bool
 994 pp_c_enumeration_constant (c_pretty_printer *pp, tree e)
 995 {
 996   bool value_is_named = true;
 997   tree type = TREE_TYPE (e);
 998   tree value;
 999
1000   /* Find the name of this constant.  */
1001   for (value = TYPE_VALUES (type);
1002        value != NULL_TREE && !tree_int_cst_equal (TREE_VALUE (value), e);
1003        value = TREE_CHAIN (value))
1004     ;
1005
1006   if (value != NULL_TREE)
1007     pp_id_expression (pp, TREE_PURPOSE (value));
1008   else
1009     {
1010       /* Value must have been cast.  */
1011       pp_c_type_cast (pp, type);
1012       value_is_named = false;
1013     }
1014
1015   return value_is_named;
1016 }
1017
1018 /* Print out a REAL value as a decimal-floating-constant.  */
1019
1020 static void
1021 pp_c_floating_constant (c_pretty_printer *pp, tree r)
1022 {
1023   const struct real_format *fmt
1024     = REAL_MODE_FORMAT (TYPE_MODE (TREE_TYPE (r)));
1025
1026   REAL_VALUE_TYPE floating_cst = TREE_REAL_CST (r);
1027   bool is_decimal = floating_cst.decimal;
1028
1029   /* See ISO C++ WG N1822.  Note: The fraction 643/2136 approximates
1030      log10(2) to 7 significant digits.  */
1031   int max_digits10 = 2 + (is_decimal ? fmt->p : fmt->p * 643L / 2136);
1032
1033   real_to_decimal (pp_buffer (pp)->digit_buffer, &TREE_REAL_CST (r),
1034                    sizeof (pp_buffer (pp)->digit_buffer),
1035                    max_digits10, 1);
1036
1037   pp_string (pp, pp_buffer(pp)->digit_buffer);
1038   if (TREE_TYPE (r) == float_type_node)
1039     pp_character (pp, 'f');
1040   else if (TREE_TYPE (r) == long_double_type_node)
1041     pp_character (pp, 'l');
1042   else if (TREE_TYPE (r) == dfloat128_type_node)
1043     pp_string (pp, "dl");
1044   else if (TREE_TYPE (r) == dfloat64_type_node)
1045     pp_string (pp, "dd");
1046   else if (TREE_TYPE (r) == dfloat32_type_node)
1047     pp_string (pp, "df");
1048 }
1049
1050 /* Print out a FIXED value as a decimal-floating-constant.  */
1051
1052 static void
1053 pp_c_fixed_constant (c_pretty_printer *pp, tree r)
1054 {
1055   fixed_to_decimal (pp_buffer (pp)->digit_buffer, &TREE_FIXED_CST (r),
1056                    sizeof (pp_buffer (pp)->digit_buffer));
1057   pp_string (pp, pp_buffer(pp)->digit_buffer);
1058 }
1059
1060 /* Pretty-print a compound literal expression.  GNU extensions include
1061    vector constants.  */
1062
1063 static void
1064 pp_c_compound_literal (c_pretty_printer *pp, tree e)
1065 {
1066   tree type = TREE_TYPE (e);
1067   pp_c_type_cast (pp, type);
1068
1069   switch (TREE_CODE (type))
1070     {
1071     case RECORD_TYPE:
1072     case UNION_TYPE:
1073     case ARRAY_TYPE:
1074     case VECTOR_TYPE:
1075     case COMPLEX_TYPE:
1076       pp_c_brace_enclosed_initializer_list (pp, e);
1077       break;
1078
1079     default:
1080       pp_unsupported_tree (pp, e);
1081       break;
1082     }
1083 }
1084
1085 /* Pretty-print a COMPLEX_EXPR expression.  */
1086
1087 static void
1088 pp_c_complex_expr (c_pretty_printer *pp, tree e)
1089 {
1090   /* Handle a few common special cases, otherwise fallback
1091      to printing it as compound literal.  */
1092   tree type = TREE_TYPE (e);
1093   tree realexpr = TREE_OPERAND (e, 0);
1094   tree imagexpr = TREE_OPERAND (e, 1);
1095
1096   /* Cast of an COMPLEX_TYPE expression to a different COMPLEX_TYPE.  */
1097   if (TREE_CODE (realexpr) == NOP_EXPR
1098       && TREE_CODE (imagexpr) == NOP_EXPR
1099       && TREE_TYPE (realexpr) == TREE_TYPE (type)
1100       && TREE_TYPE (imagexpr) == TREE_TYPE (type)
1101       && TREE_CODE (TREE_OPERAND (realexpr, 0)) == REALPART_EXPR
1102       && TREE_CODE (TREE_OPERAND (imagexpr, 0)) == IMAGPART_EXPR
1103       && TREE_OPERAND (TREE_OPERAND (realexpr, 0), 0)
1104          == TREE_OPERAND (TREE_OPERAND (imagexpr, 0), 0))
1105     {
1106       pp_c_type_cast (pp, type);
1107       pp_expression (pp, TREE_OPERAND (TREE_OPERAND (realexpr, 0), 0));
1108       return;
1109     }
1110
1111   /* Cast of an scalar expression to COMPLEX_TYPE.  */
1112   if ((integer_zerop (imagexpr) || real_zerop (imagexpr))
1113       && TREE_TYPE (realexpr) == TREE_TYPE (type))
1114     {
1115       pp_c_type_cast (pp, type);
1116       if (TREE_CODE (realexpr) == NOP_EXPR)
1117         realexpr = TREE_OPERAND (realexpr, 0);
1118       pp_expression (pp, realexpr);
1119       return;
1120     }
1121
1122   pp_c_compound_literal (pp, e);
1123 }
1124
1125 /* constant:
1126       integer-constant
1127       floating-constant
1128       fixed-point-constant
1129       enumeration-constant
1130       character-constant   */
1131
1132 void
1133 pp_c_constant (c_pretty_printer *pp, tree e)
1134 {
1135   const enum tree_code code = TREE_CODE (e);
1136
1137   switch (code)
1138     {
1139     case INTEGER_CST:
1140       {
1141         tree type = TREE_TYPE (e);
1142         if (type == boolean_type_node)
1143           pp_c_bool_constant (pp, e);
1144         else if (type == char_type_node)
1145           pp_c_character_constant (pp, e);
1146         else if (TREE_CODE (type) == ENUMERAL_TYPE
1147                  && pp_c_enumeration_constant (pp, e))
1148           ;
1149         else
1150           pp_c_integer_constant (pp, e);
1151       }
1152       break;
1153
1154     case REAL_CST:
1155       pp_c_floating_constant (pp, e);
1156       break;
1157
1158     case FIXED_CST:
1159       pp_c_fixed_constant (pp, e);
1160       break;
1161
1162     case STRING_CST:
1163       pp_c_string_literal (pp, e);
1164       break;
1165
1166     case COMPLEX_CST:
1167       /* Sometimes, we are confused and we think a complex literal
1168          is a constant.  Such thing is a compound literal which
1169          grammatically belongs to postfix-expr production.  */
1170       pp_c_compound_literal (pp, e);
1171       break;
1172
1173     default:
1174       pp_unsupported_tree (pp, e);
1175       break;
1176     }
1177 }
1178
1179 /* Pretty-print a string such as an identifier, without changing its
1180    encoding, preceded by whitespace is necessary.  */
1181
1182 void
1183 pp_c_ws_string (c_pretty_printer *pp, const char *str)
1184 {
1185   pp_c_maybe_whitespace (pp);
1186   pp_string (pp, str);
1187   pp_base (pp)->padding = pp_before;
1188 }
1189
1190 /* Pretty-print an IDENTIFIER_NODE, which may contain UTF-8 sequences
1191    that need converting to the locale encoding, preceded by whitespace
1192    is necessary.  */
1193
1194 void
1195 pp_c_identifier (c_pretty_printer *pp, const char *id)
1196 {
1197   pp_c_maybe_whitespace (pp);
1198   pp_identifier (pp, id);
1199   pp_base (pp)->padding = pp_before;
1200 }
1201
1202 /* Pretty-print a C primary-expression.
1203    primary-expression:
1204       identifier
1205       constant
1206       string-literal
1207       ( expression )   */
1208
1209 void
1210 pp_c_primary_expression (c_pretty_printer *pp, tree e)
1211 {
1212   switch (TREE_CODE (e))
1213     {
1214     case VAR_DECL:
1215     case PARM_DECL:
1216     case FIELD_DECL:
1217     case CONST_DECL:
1218     case FUNCTION_DECL:
1219     case LABEL_DECL:
1220       pp_c_tree_decl_identifier (pp, e);
1221       break;
1222
1223     case IDENTIFIER_NODE:
1224       pp_c_tree_identifier (pp, e);
1225       break;
1226
1227     case ERROR_MARK:
1228       pp_c_ws_string (pp, M_("<erroneous-expression>"));
1229       break;
1230
1231     case RESULT_DECL:
1232       pp_c_ws_string (pp, M_("<return-value>"));
1233       break;
1234
1235     case INTEGER_CST:
1236     case REAL_CST:
1237     case FIXED_CST:
1238     case STRING_CST:
1239       pp_c_constant (pp, e);
1240       break;
1241
1242     case TARGET_EXPR:
1243       pp_c_ws_string (pp, "__builtin_memcpy");
1244       pp_c_left_paren (pp);
1245       pp_ampersand (pp);
1246       pp_primary_expression (pp, TREE_OPERAND (e, 0));
1247       pp_separate_with (pp, ',');
1248       pp_ampersand (pp);
1249       pp_initializer (pp, TREE_OPERAND (e, 1));
1250       if (TREE_OPERAND (e, 2))
1251         {
1252           pp_separate_with (pp, ',');
1253           pp_c_expression (pp, TREE_OPERAND (e, 2));
1254         }
1255       pp_c_right_paren (pp);
1256       break;
1257
1258     default:
1259       /* FIXME:  Make sure we won't get into an infinite loop.  */
1260       pp_c_left_paren (pp);
1261       pp_expression (pp, e);
1262       pp_c_right_paren (pp);
1263       break;
1264     }
1265 }
1266
1267 /* Print out a C initializer -- also support C compound-literals.
1268    initializer:
1269       assignment-expression:
1270       { initializer-list }
1271       { initializer-list , }   */
1272
1273 static void
1274 pp_c_initializer (c_pretty_printer *pp, tree e)
1275 {
1276   if (TREE_CODE (e) == CONSTRUCTOR)
1277     pp_c_brace_enclosed_initializer_list (pp, e);
1278   else
1279     pp_expression (pp, e);
1280 }
1281
1282 /* init-declarator:
1283       declarator:
1284       declarator = initializer   */
1285
1286 void
1287 pp_c_init_declarator (c_pretty_printer *pp, tree t)
1288 {
1289   pp_declarator (pp, t);
1290   /* We don't want to output function definitions here.  There are handled
1291      elsewhere (and the syntactic form is bogus anyway).  */
1292   if (TREE_CODE (t) != FUNCTION_DECL && DECL_INITIAL (t))
1293     {
1294       tree init = DECL_INITIAL (t);
1295       /* This C++ bit is handled here because it is easier to do so.
1296          In templates, the C++ parser builds a TREE_LIST for a
1297          direct-initialization; the TREE_PURPOSE is the variable to
1298          initialize and the TREE_VALUE is the initializer.  */
1299       if (TREE_CODE (init) == TREE_LIST)
1300         {
1301           pp_c_left_paren (pp);
1302           pp_expression (pp, TREE_VALUE (init));
1303           pp_right_paren (pp);
1304         }
1305       else
1306         {
1307           pp_space (pp);
1308           pp_equal (pp);
1309           pp_space (pp);
1310           pp_c_initializer (pp, init);
1311         }
1312     }
1313 }
1314
1315 /* initializer-list:
1316       designation(opt) initializer
1317       initializer-list , designation(opt) initializer
1318
1319    designation:
1320       designator-list =
1321
1322    designator-list:
1323       designator
1324       designator-list designator
1325
1326    designator:
1327       [ constant-expression ]
1328       identifier   */
1329
1330 static void
1331 pp_c_initializer_list (c_pretty_printer *pp, tree e)
1332 {
1333   tree type = TREE_TYPE (e);
1334   const enum tree_code code = TREE_CODE (type);
1335
1336   if (TREE_CODE (e) == CONSTRUCTOR)
1337     {
1338       pp_c_constructor_elts (pp, CONSTRUCTOR_ELTS (e));
1339       return;
1340     }
1341
1342   switch (code)
1343     {
1344     case RECORD_TYPE:
1345     case UNION_TYPE:
1346     case ARRAY_TYPE:
1347       {
1348         tree init = TREE_OPERAND (e, 0);
1349         for (; init != NULL_TREE; init = TREE_CHAIN (init))
1350           {
1351             if (code == RECORD_TYPE || code == UNION_TYPE)
1352               {
1353                 pp_c_dot (pp);
1354                 pp_c_primary_expression (pp, TREE_PURPOSE (init));
1355               }
1356             else
1357               {
1358                 pp_c_left_bracket (pp);
1359                 if (TREE_PURPOSE (init))
1360                   pp_c_constant (pp, TREE_PURPOSE (init));
1361                 pp_c_right_bracket (pp);
1362               }
1363             pp_c_whitespace (pp);
1364             pp_equal (pp);
1365             pp_c_whitespace (pp);
1366             pp_initializer (pp, TREE_VALUE (init));
1367             if (TREE_CHAIN (init))
1368               pp_separate_with (pp, ',');
1369           }
1370       }
1371       return;
1372
1373     case VECTOR_TYPE:
1374       if (TREE_CODE (e) == VECTOR_CST)
1375         {
1376           unsigned i;
1377           for (i = 0; i < VECTOR_CST_NELTS (e); ++i)
1378             {
1379               if (i > 0)
1380                 pp_separate_with (pp, ',');
1381               pp_expression (pp, VECTOR_CST_ELT (e, i));
1382             }
1383         }
1384       else
1385         break;
1386       return;
1387
1388     case COMPLEX_TYPE:
1389       if (TREE_CODE (e) == COMPLEX_CST || TREE_CODE (e) == COMPLEX_EXPR)
1390         {
1391           const bool cst = TREE_CODE (e) == COMPLEX_CST;
1392           pp_expression (pp, cst ? TREE_REALPART (e) : TREE_OPERAND (e, 0));
1393           pp_separate_with (pp, ',');
1394           pp_expression (pp, cst ? TREE_IMAGPART (e) : TREE_OPERAND (e, 1));
1395         }
1396       else
1397         break;
1398       return;
1399
1400     default:
1401       break;
1402     }
1403
1404   pp_unsupported_tree (pp, type);
1405 }
1406
1407 /* Pretty-print a brace-enclosed initializer-list.  */
1408
1409 static void
1410 pp_c_brace_enclosed_initializer_list (c_pretty_printer *pp, tree l)
1411 {
1412   pp_c_left_brace (pp);
1413   pp_c_initializer_list (pp, l);
1414   pp_c_right_brace (pp);
1415 }
1416
1417
1418 /*  This is a convenient function, used to bridge gap between C and C++
1419     grammars.
1420
1421     id-expression:
1422        identifier  */
1423
1424 void
1425 pp_c_id_expression (c_pretty_printer *pp, tree t)
1426 {
1427   switch (TREE_CODE (t))
1428     {
1429     case VAR_DECL:
1430     case PARM_DECL:
1431     case CONST_DECL:
1432     case TYPE_DECL:
1433     case FUNCTION_DECL:
1434     case FIELD_DECL:
1435     case LABEL_DECL:
1436       pp_c_tree_decl_identifier (pp, t);
1437       break;
1438
1439     case IDENTIFIER_NODE:
1440       pp_c_tree_identifier (pp, t);
1441       break;
1442
1443     default:
1444       pp_unsupported_tree (pp, t);
1445       break;
1446     }
1447 }
1448
1449 /* postfix-expression:
1450       primary-expression
1451       postfix-expression [ expression ]
1452       postfix-expression ( argument-expression-list(opt) )
1453       postfix-expression . identifier
1454       postfix-expression -> identifier
1455       postfix-expression ++
1456       postfix-expression --
1457       ( type-name ) { initializer-list }
1458       ( type-name ) { initializer-list , }  */
1459
1460 void
1461 pp_c_postfix_expression (c_pretty_printer *pp, tree e)
1462 {
1463   enum tree_code code = TREE_CODE (e);
1464   switch (code)
1465     {
1466     case POSTINCREMENT_EXPR:
1467     case POSTDECREMENT_EXPR:
1468       pp_postfix_expression (pp, TREE_OPERAND (e, 0));
1469       pp_string (pp, code == POSTINCREMENT_EXPR ? "++" : "--");
1470       break;
1471
1472     case ARRAY_REF:
1473       pp_postfix_expression (pp, TREE_OPERAND (e, 0));
1474       pp_c_left_bracket (pp);
1475       pp_expression (pp, TREE_OPERAND (e, 1));
1476       pp_c_right_bracket (pp);
1477       break;
1478
1479     case ARRAY_NOTATION_REF:
1480       pp_postfix_expression (pp, ARRAY_NOTATION_ARRAY (e));
1481       pp_c_left_bracket (pp);
1482       pp_expression (pp, ARRAY_NOTATION_START (e));
1483       pp_colon (pp);
1484       pp_expression (pp, ARRAY_NOTATION_LENGTH (e));
1485       pp_colon (pp);
1486       pp_expression (pp, ARRAY_NOTATION_STRIDE (e));
1487       pp_c_right_bracket (pp);
1488       break;
1489
1490     case CALL_EXPR:
1491       {
1492         call_expr_arg_iterator iter;
1493         tree arg;
1494         pp_postfix_expression (pp, CALL_EXPR_FN (e));
1495         pp_c_left_paren (pp);
1496         FOR_EACH_CALL_EXPR_ARG (arg, iter, e)
1497           {
1498             pp_expression (pp, arg);
1499             if (more_call_expr_args_p (&iter))
1500               pp_separate_with (pp, ',');
1501           }
1502         pp_c_right_paren (pp);
1503         break;
1504       }
1505
1506     case UNORDERED_EXPR:
1507       pp_c_ws_string (pp, flag_isoc99
1508                            ? "isunordered"
1509                            : "__builtin_isunordered");
1510       goto two_args_fun;
1511
1512     case ORDERED_EXPR:
1513       pp_c_ws_string (pp, flag_isoc99
1514                            ? "!isunordered"
1515                            : "!__builtin_isunordered");
1516       goto two_args_fun;
1517
1518     case UNLT_EXPR:
1519       pp_c_ws_string (pp, flag_isoc99
1520                            ? "!isgreaterequal"
1521                            : "!__builtin_isgreaterequal");
1522       goto two_args_fun;
1523
1524     case UNLE_EXPR:
1525       pp_c_ws_string (pp, flag_isoc99
1526                            ? "!isgreater"
1527                            : "!__builtin_isgreater");
1528       goto two_args_fun;
1529
1530     case UNGT_EXPR:
1531       pp_c_ws_string (pp, flag_isoc99
1532                            ? "!islessequal"
1533                            : "!__builtin_islessequal");
1534       goto two_args_fun;
1535
1536     case UNGE_EXPR:
1537       pp_c_ws_string (pp, flag_isoc99
1538                            ? "!isless"
1539                            : "!__builtin_isless");
1540       goto two_args_fun;
1541
1542     case UNEQ_EXPR:
1543       pp_c_ws_string (pp, flag_isoc99
1544                            ? "!islessgreater"
1545                            : "!__builtin_islessgreater");
1546       goto two_args_fun;
1547
1548     case LTGT_EXPR:
1549       pp_c_ws_string (pp, flag_isoc99
1550                            ? "islessgreater"
1551                            : "__builtin_islessgreater");
1552       goto two_args_fun;
1553
1554     two_args_fun:
1555       pp_c_left_paren (pp);
1556       pp_expression (pp, TREE_OPERAND (e, 0));
1557       pp_separate_with (pp, ',');
1558       pp_expression (pp, TREE_OPERAND (e, 1));
1559       pp_c_right_paren (pp);
1560       break;
1561
1562     case ABS_EXPR:
1563       pp_c_ws_string (pp, "__builtin_abs");
1564       pp_c_left_paren (pp);
1565       pp_expression (pp, TREE_OPERAND (e, 0));
1566       pp_c_right_paren (pp);
1567       break;
1568
1569     case COMPONENT_REF:
1570       {
1571         tree object = TREE_OPERAND (e, 0);
1572         if (TREE_CODE (object) == INDIRECT_REF)
1573           {
1574             pp_postfix_expression (pp, TREE_OPERAND (object, 0));
1575             pp_c_arrow (pp);
1576           }
1577         else
1578           {
1579             pp_postfix_expression (pp, object);
1580             pp_c_dot (pp);
1581           }
1582         pp_expression (pp, TREE_OPERAND (e, 1));
1583       }
1584       break;
1585
1586     case BIT_FIELD_REF:
1587       {
1588         tree type = TREE_TYPE (e);
1589
1590         type = signed_or_unsigned_type_for (TYPE_UNSIGNED (type), type);
1591         if (type
1592             && tree_int_cst_equal (TYPE_SIZE (type), TREE_OPERAND (e, 1)))
1593           {
1594             HOST_WIDE_INT bitpos = tree_low_cst (TREE_OPERAND (e, 2), 0);
1595             HOST_WIDE_INT size = tree_low_cst (TYPE_SIZE (type), 0);
1596             if ((bitpos % size) == 0)
1597               {
1598                 pp_c_left_paren (pp);
1599                 pp_c_left_paren (pp);
1600                 pp_type_id (pp, type);
1601                 pp_c_star (pp);
1602                 pp_c_right_paren (pp);
1603                 pp_c_ampersand (pp);
1604                 pp_expression (pp, TREE_OPERAND (e, 0));
1605                 pp_c_right_paren (pp);
1606                 pp_c_left_bracket (pp);
1607                 pp_wide_integer (pp, bitpos / size);
1608                 pp_c_right_bracket (pp);
1609                 break;
1610               }
1611           }
1612         pp_unsupported_tree (pp, e);
1613       }
1614       break;
1615
1616     case MEM_REF:
1617       pp_c_expression (pp, e);
1618       break;
1619
1620     case COMPLEX_CST:
1621     case VECTOR_CST:
1622       pp_c_compound_literal (pp, e);
1623       break;
1624
1625     case COMPLEX_EXPR:
1626       pp_c_complex_expr (pp, e);
1627       break;
1628
1629     case COMPOUND_LITERAL_EXPR:
1630       e = DECL_INITIAL (COMPOUND_LITERAL_EXPR_DECL (e));
1631       /* Fall through.  */
1632     case CONSTRUCTOR:
1633       pp_initializer (pp, e);
1634       break;
1635
1636     case VA_ARG_EXPR:
1637       pp_c_ws_string (pp, "__builtin_va_arg");
1638       pp_c_left_paren (pp);
1639       pp_assignment_expression (pp, TREE_OPERAND (e, 0));
1640       pp_separate_with (pp, ',');
1641       pp_type_id (pp, TREE_TYPE (e));
1642       pp_c_right_paren (pp);
1643       break;
1644
1645     case ADDR_EXPR:
1646       if (TREE_CODE (TREE_OPERAND (e, 0)) == FUNCTION_DECL)
1647         {
1648           pp_c_id_expression (pp, TREE_OPERAND (e, 0));
1649           break;
1650         }
1651       /* else fall through.  */
1652
1653     default:
1654       pp_primary_expression (pp, e);
1655       break;
1656     }
1657 }
1658
1659 /* Print out an expression-list; E is expected to be a TREE_LIST.  */
1660
1661 void
1662 pp_c_expression_list (c_pretty_printer *pp, tree e)
1663 {
1664   for (; e != NULL_TREE; e = TREE_CHAIN (e))
1665     {
1666       pp_expression (pp, TREE_VALUE (e));
1667       if (TREE_CHAIN (e))
1668         pp_separate_with (pp, ',');
1669     }
1670 }
1671
1672 /* Print out V, which contains the elements of a constructor.  */
1673
1674 void
1675 pp_c_constructor_elts (c_pretty_printer *pp, vec<constructor_elt, va_gc> *v)
1676 {
1677   unsigned HOST_WIDE_INT ix;
1678   tree value;
1679
1680   FOR_EACH_CONSTRUCTOR_VALUE (v, ix, value)
1681     {
1682       pp_expression (pp, value);
1683       if (ix != vec_safe_length (v) - 1)
1684         pp_separate_with (pp, ',');
1685     }
1686 }
1687
1688 /* Print out an expression-list in parens, as if it were the argument
1689    list to a function.  */
1690
1691 void
1692 pp_c_call_argument_list (c_pretty_printer *pp, tree t)
1693 {
1694   pp_c_left_paren (pp);
1695   if (t && TREE_CODE (t) == TREE_LIST)
1696     pp_c_expression_list (pp, t);
1697   pp_c_right_paren (pp);
1698 }
1699
1700 /* unary-expression:
1701       postfix-expression
1702       ++ cast-expression
1703       -- cast-expression
1704       unary-operator cast-expression
1705       sizeof unary-expression
1706       sizeof ( type-id )
1707
1708   unary-operator: one of
1709       * &  + - ! ~
1710
1711    GNU extensions.
1712    unary-expression:
1713       __alignof__ unary-expression
1714       __alignof__ ( type-id )
1715       __real__ unary-expression
1716       __imag__ unary-expression  */
1717
1718 void
1719 pp_c_unary_expression (c_pretty_printer *pp, tree e)
1720 {
1721   enum tree_code code = TREE_CODE (e);
1722   switch (code)
1723     {
1724     case PREINCREMENT_EXPR:
1725     case PREDECREMENT_EXPR:
1726       pp_string (pp, code == PREINCREMENT_EXPR ? "++" : "--");
1727       pp_c_unary_expression (pp, TREE_OPERAND (e, 0));
1728       break;
1729
1730     case ADDR_EXPR:
1731     case INDIRECT_REF:
1732     case NEGATE_EXPR:
1733     case BIT_NOT_EXPR:
1734     case TRUTH_NOT_EXPR:
1735     case CONJ_EXPR:
1736       /* String literal are used by address.  */
1737       if (code == ADDR_EXPR && TREE_CODE (TREE_OPERAND (e, 0)) != STRING_CST)
1738         pp_ampersand (pp);
1739       else if (code == INDIRECT_REF)
1740         pp_c_star (pp);
1741       else if (code == NEGATE_EXPR)
1742         pp_minus (pp);
1743       else if (code == BIT_NOT_EXPR || code == CONJ_EXPR)
1744         pp_complement (pp);
1745       else if (code == TRUTH_NOT_EXPR)
1746         pp_exclamation (pp);
1747       pp_c_cast_expression (pp, TREE_OPERAND (e, 0));
1748       break;
1749
1750     case MEM_REF:
1751       if (TREE_CODE (TREE_OPERAND (e, 0)) == ADDR_EXPR
1752           && integer_zerop (TREE_OPERAND (e, 1)))
1753         pp_c_expression (pp, TREE_OPERAND (TREE_OPERAND (e, 0), 0));
1754       else
1755         {
1756           pp_c_star (pp);
1757           if (!integer_zerop (TREE_OPERAND (e, 1)))
1758             {
1759               pp_c_left_paren (pp);
1760               if (!integer_onep (TYPE_SIZE_UNIT
1761                                  (TREE_TYPE (TREE_TYPE (TREE_OPERAND (e, 0))))))
1762                 pp_c_type_cast (pp, ptr_type_node);
1763             }
1764           pp_c_cast_expression (pp, TREE_OPERAND (e, 0));
1765           if (!integer_zerop (TREE_OPERAND (e, 1)))
1766             {
1767               pp_plus (pp);
1768               pp_c_integer_constant (pp,
1769                                      fold_convert (ssizetype,
1770                                                    TREE_OPERAND (e, 1)));
1771               pp_c_right_paren (pp);
1772             }
1773         }
1774       break;
1775
1776     case REALPART_EXPR:
1777     case IMAGPART_EXPR:
1778       pp_c_ws_string (pp, code == REALPART_EXPR ? "__real__" : "__imag__");
1779       pp_c_whitespace (pp);
1780       pp_unary_expression (pp, TREE_OPERAND (e, 0));
1781       break;
1782
1783     default:
1784       pp_postfix_expression (pp, e);
1785       break;
1786     }
1787 }
1788
1789 /* cast-expression:
1790       unary-expression
1791       ( type-name ) cast-expression  */
1792
1793 void
1794 pp_c_cast_expression (c_pretty_printer *pp, tree e)
1795 {
1796   switch (TREE_CODE (e))
1797     {
1798     case FLOAT_EXPR:
1799     case FIX_TRUNC_EXPR:
1800     CASE_CONVERT:
1801     case VIEW_CONVERT_EXPR:
1802       pp_c_type_cast (pp, TREE_TYPE (e));
1803       pp_c_cast_expression (pp, TREE_OPERAND (e, 0));
1804       break;
1805
1806     default:
1807       pp_unary_expression (pp, e);
1808     }
1809 }
1810
1811 /* multiplicative-expression:
1812       cast-expression
1813       multiplicative-expression * cast-expression
1814       multiplicative-expression / cast-expression
1815       multiplicative-expression % cast-expression   */
1816
1817 static void
1818 pp_c_multiplicative_expression (c_pretty_printer *pp, tree e)
1819 {
1820   enum tree_code code = TREE_CODE (e);
1821   switch (code)
1822     {
1823     case MULT_EXPR:
1824     case TRUNC_DIV_EXPR:
1825     case TRUNC_MOD_EXPR:
1826       pp_multiplicative_expression (pp, TREE_OPERAND (e, 0));
1827       pp_c_whitespace (pp);
1828       if (code == MULT_EXPR)
1829         pp_c_star (pp);
1830       else if (code == TRUNC_DIV_EXPR)
1831         pp_slash (pp);
1832       else
1833         pp_modulo (pp);
1834       pp_c_whitespace (pp);
1835       pp_c_cast_expression (pp, TREE_OPERAND (e, 1));
1836       break;
1837
1838     default:
1839       pp_c_cast_expression (pp, e);
1840       break;
1841     }
1842 }
1843
1844 /* additive-expression:
1845       multiplicative-expression
1846       additive-expression + multiplicative-expression
1847       additive-expression - multiplicative-expression   */
1848
1849 static void
1850 pp_c_additive_expression (c_pretty_printer *pp, tree e)
1851 {
1852   enum tree_code code = TREE_CODE (e);
1853   switch (code)
1854     {
1855     case POINTER_PLUS_EXPR:
1856     case PLUS_EXPR:
1857     case MINUS_EXPR:
1858       pp_c_additive_expression (pp, TREE_OPERAND (e, 0));
1859       pp_c_whitespace (pp);
1860       if (code == PLUS_EXPR || code == POINTER_PLUS_EXPR)
1861         pp_plus (pp);
1862       else
1863         pp_minus (pp);
1864       pp_c_whitespace (pp);
1865       pp_multiplicative_expression (pp, TREE_OPERAND (e, 1));
1866       break;
1867
1868     default:
1869       pp_multiplicative_expression (pp, e);
1870       break;
1871     }
1872 }
1873
1874 /* additive-expression:
1875       additive-expression
1876       shift-expression << additive-expression
1877       shift-expression >> additive-expression   */
1878
1879 static void
1880 pp_c_shift_expression (c_pretty_printer *pp, tree e)
1881 {
1882   enum tree_code code = TREE_CODE (e);
1883   switch (code)
1884     {
1885     case LSHIFT_EXPR:
1886     case RSHIFT_EXPR:
1887       pp_c_shift_expression (pp, TREE_OPERAND (e, 0));
1888       pp_c_whitespace (pp);
1889       pp_string (pp, code == LSHIFT_EXPR ? "<<" : ">>");
1890       pp_c_whitespace (pp);
1891       pp_c_additive_expression (pp, TREE_OPERAND (e, 1));
1892       break;
1893
1894     default:
1895       pp_c_additive_expression (pp, e);
1896     }
1897 }
1898
1899 /* relational-expression:
1900       shift-expression
1901       relational-expression < shift-expression
1902       relational-expression > shift-expression
1903       relational-expression <= shift-expression
1904       relational-expression >= shift-expression   */
1905
1906 static void
1907 pp_c_relational_expression (c_pretty_printer *pp, tree e)
1908 {
1909   enum tree_code code = TREE_CODE (e);
1910   switch (code)
1911     {
1912     case LT_EXPR:
1913     case GT_EXPR:
1914     case LE_EXPR:
1915     case GE_EXPR:
1916       pp_c_relational_expression (pp, TREE_OPERAND (e, 0));
1917       pp_c_whitespace (pp);
1918       if (code == LT_EXPR)
1919         pp_less (pp);
1920       else if (code == GT_EXPR)
1921         pp_greater (pp);
1922       else if (code == LE_EXPR)
1923         pp_string (pp, "<=");
1924       else if (code == GE_EXPR)
1925         pp_string (pp, ">=");
1926       pp_c_whitespace (pp);
1927       pp_c_shift_expression (pp, TREE_OPERAND (e, 1));
1928       break;
1929
1930     default:
1931       pp_c_shift_expression (pp, e);
1932       break;
1933     }
1934 }
1935
1936 /* equality-expression:
1937       relational-expression
1938       equality-expression == relational-expression
1939       equality-equality != relational-expression  */
1940
1941 static void
1942 pp_c_equality_expression (c_pretty_printer *pp, tree e)
1943 {
1944   enum tree_code code = TREE_CODE (e);
1945   switch (code)
1946     {
1947     case EQ_EXPR:
1948     case NE_EXPR:
1949       pp_c_equality_expression (pp, TREE_OPERAND (e, 0));
1950       pp_c_whitespace (pp);
1951       pp_string (pp, code == EQ_EXPR ? "==" : "!=");
1952       pp_c_whitespace (pp);
1953       pp_c_relational_expression (pp, TREE_OPERAND (e, 1));
1954       break;
1955
1956     default:
1957       pp_c_relational_expression (pp, e);
1958       break;
1959     }
1960 }
1961
1962 /* AND-expression:
1963       equality-expression
1964       AND-expression & equality-equality   */
1965
1966 static void
1967 pp_c_and_expression (c_pretty_printer *pp, tree e)
1968 {
1969   if (TREE_CODE (e) == BIT_AND_EXPR)
1970     {
1971       pp_c_and_expression (pp, TREE_OPERAND (e, 0));
1972       pp_c_whitespace (pp);
1973       pp_ampersand (pp);
1974       pp_c_whitespace (pp);
1975       pp_c_equality_expression (pp, TREE_OPERAND (e, 1));
1976     }
1977   else
1978     pp_c_equality_expression (pp, e);
1979 }
1980
1981 /* exclusive-OR-expression:
1982      AND-expression
1983      exclusive-OR-expression ^ AND-expression  */
1984
1985 static void
1986 pp_c_exclusive_or_expression (c_pretty_printer *pp, tree e)
1987 {
1988   if (TREE_CODE (e) == BIT_XOR_EXPR
1989       || TREE_CODE (e) == TRUTH_XOR_EXPR)
1990     {
1991       pp_c_exclusive_or_expression (pp, TREE_OPERAND (e, 0));
1992       if (TREE_CODE (e) == BIT_XOR_EXPR)
1993         pp_c_maybe_whitespace (pp);
1994       else
1995         pp_c_whitespace (pp);
1996       pp_carret (pp);
1997       pp_c_whitespace (pp);
1998       pp_c_and_expression (pp, TREE_OPERAND (e, 1));
1999     }
2000   else
2001     pp_c_and_expression (pp, e);
2002 }
2003
2004 /* inclusive-OR-expression:
2005      exclusive-OR-expression
2006      inclusive-OR-expression | exclusive-OR-expression  */
2007
2008 static void
2009 pp_c_inclusive_or_expression (c_pretty_printer *pp, tree e)
2010 {
2011   if (TREE_CODE (e) == BIT_IOR_EXPR)
2012     {
2013       pp_c_exclusive_or_expression (pp, TREE_OPERAND (e, 0));
2014       pp_c_whitespace (pp);
2015       pp_bar (pp);
2016       pp_c_whitespace (pp);
2017       pp_c_exclusive_or_expression (pp, TREE_OPERAND (e, 1));
2018     }
2019   else
2020     pp_c_exclusive_or_expression (pp, e);
2021 }
2022
2023 /* logical-AND-expression:
2024       inclusive-OR-expression
2025       logical-AND-expression && inclusive-OR-expression  */
2026
2027 static void
2028 pp_c_logical_and_expression (c_pretty_printer *pp, tree e)
2029 {
2030   if (TREE_CODE (e) == TRUTH_ANDIF_EXPR
2031       || TREE_CODE (e) == TRUTH_AND_EXPR)
2032     {
2033       pp_c_logical_and_expression (pp, TREE_OPERAND (e, 0));
2034       pp_c_whitespace (pp);
2035       pp_string (pp, "&&");
2036       pp_c_whitespace (pp);
2037       pp_c_inclusive_or_expression (pp, TREE_OPERAND (e, 1));
2038     }
2039   else
2040     pp_c_inclusive_or_expression (pp, e);
2041 }
2042
2043 /* logical-OR-expression:
2044       logical-AND-expression
2045       logical-OR-expression || logical-AND-expression  */
2046
2047 void
2048 pp_c_logical_or_expression (c_pretty_printer *pp, tree e)
2049 {
2050   if (TREE_CODE (e) == TRUTH_ORIF_EXPR
2051       || TREE_CODE (e) == TRUTH_OR_EXPR)
2052     {
2053       pp_c_logical_or_expression (pp, TREE_OPERAND (e, 0));
2054       pp_c_whitespace (pp);
2055       pp_string (pp, "||");
2056       pp_c_whitespace (pp);
2057       pp_c_logical_and_expression (pp, TREE_OPERAND (e, 1));
2058     }
2059   else
2060     pp_c_logical_and_expression (pp, e);
2061 }
2062
2063 /* conditional-expression:
2064       logical-OR-expression
2065       logical-OR-expression ? expression : conditional-expression  */
2066
2067 static void
2068 pp_c_conditional_expression (c_pretty_printer *pp, tree e)
2069 {
2070   if (TREE_CODE (e) == COND_EXPR)
2071     {
2072       pp_c_logical_or_expression (pp, TREE_OPERAND (e, 0));
2073       pp_c_whitespace (pp);
2074       pp_question (pp);
2075       pp_c_whitespace (pp);
2076       pp_expression (pp, TREE_OPERAND (e, 1));
2077       pp_c_whitespace (pp);
2078       pp_colon (pp);
2079       pp_c_whitespace (pp);
2080       pp_c_conditional_expression (pp, TREE_OPERAND (e, 2));
2081     }
2082   else
2083     pp_c_logical_or_expression (pp, e);
2084 }
2085
2086
2087 /* assignment-expression:
2088       conditional-expression
2089       unary-expression assignment-operator  assignment-expression
2090
2091    assignment-expression: one of
2092       =    *=    /=    %=    +=    -=    >>=    <<=    &=    ^=    |=  */
2093
2094 static void
2095 pp_c_assignment_expression (c_pretty_printer *pp, tree e)
2096 {
2097   if (TREE_CODE (e) == MODIFY_EXPR
2098       || TREE_CODE (e) == INIT_EXPR)
2099     {
2100       pp_c_unary_expression (pp, TREE_OPERAND (e, 0));
2101       pp_c_whitespace (pp);
2102       pp_equal (pp);
2103       pp_space (pp);
2104       pp_c_expression (pp, TREE_OPERAND (e, 1));
2105     }
2106   else
2107     pp_c_conditional_expression (pp, e);
2108 }
2109
2110 /* expression:
2111        assignment-expression
2112        expression , assignment-expression
2113
2114   Implementation note:  instead of going through the usual recursion
2115   chain, I take the liberty of dispatching nodes to the appropriate
2116   functions.  This makes some redundancy, but it worths it. That also
2117   prevents a possible infinite recursion between pp_c_primary_expression ()
2118   and pp_c_expression ().  */
2119
2120 void
2121 pp_c_expression (c_pretty_printer *pp, tree e)
2122 {
2123   switch (TREE_CODE (e))
2124     {
2125     case INTEGER_CST:
2126       pp_c_integer_constant (pp, e);
2127       break;
2128
2129     case REAL_CST:
2130       pp_c_floating_constant (pp, e);
2131       break;
2132
2133     case FIXED_CST:
2134       pp_c_fixed_constant (pp, e);
2135       break;
2136
2137     case STRING_CST:
2138       pp_c_string_literal (pp, e);
2139       break;
2140
2141     case IDENTIFIER_NODE:
2142     case FUNCTION_DECL:
2143     case VAR_DECL:
2144     case CONST_DECL:
2145     case PARM_DECL:
2146     case RESULT_DECL:
2147     case FIELD_DECL:
2148     case LABEL_DECL:
2149     case ERROR_MARK:
2150       pp_primary_expression (pp, e);
2151       break;
2152
2153     case SSA_NAME:
2154       if (SSA_NAME_VAR (e)
2155           && !DECL_ARTIFICIAL (SSA_NAME_VAR (e)))
2156         pp_c_expression (pp, SSA_NAME_VAR (e));
2157       else
2158         pp_c_ws_string (pp, M_("<unknown>"));
2159       break;
2160
2161     case POSTINCREMENT_EXPR:
2162     case POSTDECREMENT_EXPR:
2163     case ARRAY_REF:
2164     case ARRAY_NOTATION_REF:
2165     case CALL_EXPR:
2166     case COMPONENT_REF:
2167     case BIT_FIELD_REF:
2168     case COMPLEX_CST:
2169     case COMPLEX_EXPR:
2170     case VECTOR_CST:
2171     case ORDERED_EXPR:
2172     case UNORDERED_EXPR:
2173     case LTGT_EXPR:
2174     case UNEQ_EXPR:
2175     case UNLE_EXPR:
2176     case UNLT_EXPR:
2177     case UNGE_EXPR:
2178     case UNGT_EXPR:
2179     case ABS_EXPR:
2180     case CONSTRUCTOR:
2181     case COMPOUND_LITERAL_EXPR:
2182     case VA_ARG_EXPR:
2183       pp_postfix_expression (pp, e);
2184       break;
2185
2186     case CONJ_EXPR:
2187     case ADDR_EXPR:
2188     case INDIRECT_REF:
2189     case MEM_REF:
2190     case NEGATE_EXPR:
2191     case BIT_NOT_EXPR:
2192     case TRUTH_NOT_EXPR:
2193     case PREINCREMENT_EXPR:
2194     case PREDECREMENT_EXPR:
2195     case REALPART_EXPR:
2196     case IMAGPART_EXPR:
2197       pp_c_unary_expression (pp, e);
2198       break;
2199
2200     case FLOAT_EXPR:
2201     case FIX_TRUNC_EXPR:
2202     CASE_CONVERT:
2203     case VIEW_CONVERT_EXPR:
2204       pp_c_cast_expression (pp, e);
2205       break;
2206
2207     case MULT_EXPR:
2208     case TRUNC_MOD_EXPR:
2209     case TRUNC_DIV_EXPR:
2210       pp_multiplicative_expression (pp, e);
2211       break;
2212
2213     case LSHIFT_EXPR:
2214     case RSHIFT_EXPR:
2215       pp_c_shift_expression (pp, e);
2216       break;
2217
2218     case LT_EXPR:
2219     case GT_EXPR:
2220     case LE_EXPR:
2221     case GE_EXPR:
2222       pp_c_relational_expression (pp, e);
2223       break;
2224
2225     case BIT_AND_EXPR:
2226       pp_c_and_expression (pp, e);
2227       break;
2228
2229     case BIT_XOR_EXPR:
2230     case TRUTH_XOR_EXPR:
2231       pp_c_exclusive_or_expression (pp, e);
2232       break;
2233
2234     case BIT_IOR_EXPR:
2235       pp_c_inclusive_or_expression (pp, e);
2236       break;
2237
2238     case TRUTH_ANDIF_EXPR:
2239     case TRUTH_AND_EXPR:
2240       pp_c_logical_and_expression (pp, e);
2241       break;
2242
2243     case TRUTH_ORIF_EXPR:
2244     case TRUTH_OR_EXPR:
2245       pp_c_logical_or_expression (pp, e);
2246       break;
2247
2248     case EQ_EXPR:
2249     case NE_EXPR:
2250       pp_c_equality_expression (pp, e);
2251       break;
2252
2253     case COND_EXPR:
2254       pp_conditional_expression (pp, e);
2255       break;
2256
2257     case POINTER_PLUS_EXPR:
2258     case PLUS_EXPR:
2259     case MINUS_EXPR:
2260       pp_c_additive_expression (pp, e);
2261       break;
2262
2263     case MODIFY_EXPR:
2264     case INIT_EXPR:
2265       pp_assignment_expression (pp, e);
2266       break;
2267
2268     case COMPOUND_EXPR:
2269       pp_c_left_paren (pp);
2270       pp_expression (pp, TREE_OPERAND (e, 0));
2271       pp_separate_with (pp, ',');
2272       pp_assignment_expression (pp, TREE_OPERAND (e, 1));
2273       pp_c_right_paren (pp);
2274       break;
2275
2276     case NON_LVALUE_EXPR:
2277     case SAVE_EXPR:
2278       pp_expression (pp, TREE_OPERAND (e, 0));
2279       break;
2280
2281     case TARGET_EXPR:
2282       pp_postfix_expression (pp, TREE_OPERAND (e, 1));
2283       break;
2284
2285     case BIND_EXPR:
2286     case GOTO_EXPR:
2287       /* We don't yet have a way of dumping statements in a
2288          human-readable format.  */
2289       pp_string (pp, "({...})");
2290       break;
2291
2292     case C_MAYBE_CONST_EXPR:
2293       pp_c_expression (pp, C_MAYBE_CONST_EXPR_EXPR (e));
2294       break;
2295
2296     default:
2297       pp_unsupported_tree (pp, e);
2298       break;
2299     }
2300 }
2301
2302
2303 \f
2304 /* Statements.  */
2305
2306 void
2307 pp_c_statement (c_pretty_printer *pp, tree stmt)
2308 {
2309   if (stmt == NULL)
2310     return;
2311
2312   if (pp_needs_newline (pp))
2313     pp_newline_and_indent (pp, 0);
2314
2315   dump_generic_node (pp_base (pp), stmt, pp_indentation (pp), 0, true);
2316 }
2317
2318 \f
2319 /* Initialize the PRETTY-PRINTER for handling C codes.  */
2320
2321 void
2322 pp_c_pretty_printer_init (c_pretty_printer *pp)
2323 {
2324   pp->offset_list               = 0;
2325
2326   pp->flags                     = 0;
2327
2328   pp->declaration               = pp_c_declaration;
2329   pp->declaration_specifiers    = pp_c_declaration_specifiers;
2330   pp->declarator                = pp_c_declarator;
2331   pp->direct_declarator         = pp_c_direct_declarator;
2332   pp->type_specifier_seq        = pp_c_specifier_qualifier_list;
2333   pp->abstract_declarator       = pp_c_abstract_declarator;
2334   pp->direct_abstract_declarator = pp_c_direct_abstract_declarator;
2335   pp->ptr_operator              = pp_c_pointer;
2336   pp->parameter_list            = pp_c_parameter_type_list;
2337   pp->type_id                   = pp_c_type_id;
2338   pp->simple_type_specifier     = pp_c_type_specifier;
2339   pp->function_specifier        = pp_c_function_specifier;
2340   pp->storage_class_specifier   = pp_c_storage_class_specifier;
2341
2342   pp->statement                 = pp_c_statement;
2343
2344   pp->constant                  = pp_c_constant;
2345   pp->id_expression             = pp_c_id_expression;
2346   pp->primary_expression        = pp_c_primary_expression;
2347   pp->postfix_expression        = pp_c_postfix_expression;
2348   pp->unary_expression          = pp_c_unary_expression;
2349   pp->initializer               = pp_c_initializer;
2350   pp->multiplicative_expression = pp_c_multiplicative_expression;
2351   pp->conditional_expression    = pp_c_conditional_expression;
2352   pp->assignment_expression     = pp_c_assignment_expression;
2353   pp->expression                = pp_c_expression;
2354 }
2355
2356
2357 /* Print the tree T in full, on file FILE.  */
2358
2359 void
2360 print_c_tree (FILE *file, tree t)
2361 {
2362   static c_pretty_printer pp_rec;
2363   static bool initialized = 0;
2364   c_pretty_printer *pp = &pp_rec;
2365
2366   if (!initialized)
2367     {
2368       initialized = 1;
2369       pp_construct (pp_base (pp), NULL, 0);
2370       pp_c_pretty_printer_init (pp);
2371       pp_needs_newline (pp) = true;
2372     }
2373   pp_base (pp)->buffer->stream = file;
2374
2375   pp_statement (pp, t);
2376
2377   pp_newline_and_flush (pp);
2378 }
2379
2380 /* Print the tree T in full, on stderr.  */
2381
2382 DEBUG_FUNCTION void
2383 debug_c_tree (tree t)
2384 {
2385   print_c_tree (stderr, t);
2386   fputc ('\n', stderr);
2387 }
2388
2389 /* Output the DECL_NAME of T.  If T has no DECL_NAME, output a string made
2390    up of T's memory address.  */
2391
2392 void
2393 pp_c_tree_decl_identifier (c_pretty_printer *pp, tree t)
2394 {
2395   const char *name;
2396
2397   gcc_assert (DECL_P (t));
2398
2399   if (DECL_NAME (t))
2400     name = IDENTIFIER_POINTER (DECL_NAME (t));
2401   else
2402     {
2403       static char xname[8];
2404       sprintf (xname, "<U%4x>", ((unsigned)((uintptr_t)(t) & 0xffff)));
2405       name = xname;
2406     }
2407
2408   pp_c_identifier (pp, name);
2409 }