gcc/java/builtins.c

   1 /* Built-in and inline functions for gcj
   2    Copyright (C) 2001, 2003, 2004, 2005, 2006
   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
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GCC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  20 Boston, MA 02110-1301, USA.
  21
  22 Java and all Java-based marks are trademarks or registered trademarks
  23 of Sun Microsystems, Inc. in the United States and other countries.
  24 The Free Software Foundation is independent of Sun Microsystems, Inc.  */
  25
  26 /* Written by Tom Tromey <tromey@redhat.com>.  */
  27
  28 #include "config.h"
  29 #include "system.h"
  30 #include "coretypes.h"
  31 #include "tm.h"
  32 #include "tree.h"
  33 #include "ggc.h"
  34 #include "flags.h"
  35 #include "langhooks.h"
  36 #include "java-tree.h"
  37 #include <stdarg.h>
  38 #include "convert.h"
  39 #include "rtl.h"
  40 #include "insn-codes.h"
  41 #include "expr.h"
  42 #include "optabs.h"
  43
  44 static tree max_builtin (tree, tree);
  45 static tree min_builtin (tree, tree);
  46 static tree abs_builtin (tree, tree);
  47 static tree convert_real (tree, tree);
  48
  49 static tree java_build_function_call_expr (tree, tree);
  50
  51 static tree putObject_builtin (tree, tree);
  52 static tree compareAndSwapInt_builtin (tree, tree);
  53 static tree compareAndSwapLong_builtin (tree, tree);
  54 static tree compareAndSwapObject_builtin (tree, tree);
  55 static tree putVolatile_builtin (tree, tree);
  56 static tree getVolatile_builtin (tree, tree);
  57
  58 \f
  59
  60 /* Functions of this type are used to inline a given call.  Such a
  61    function should either return an expression, if the call is to be
  62    inlined, or NULL_TREE if a real call should be emitted.  Arguments
  63    are method return type and arguments to call.  */
  64 typedef tree builtin_creator_function (tree, tree);
  65
  66 /* Hold a char*, before initialization, or a tree, after
  67    initialization.  */
  68 union string_or_tree GTY(())
  69 {
  70   const char * GTY ((tag ("0"))) s;
  71   tree GTY ((tag ("1"))) t;
  72 };
  73
  74 /* Used to hold a single builtin record.  */
  75 struct builtin_record GTY(())
  76 {
  77   union string_or_tree GTY ((desc ("1"))) class_name;
  78   union string_or_tree GTY ((desc ("1"))) method_name;
  79   builtin_creator_function * GTY((skip)) creator;
  80   enum built_in_function builtin_code;
  81 };
  82
  83 static GTY(()) struct builtin_record java_builtins[] =
  84 {
  85   { { "java.lang.Math" }, { "min" }, min_builtin, 0 },
  86   { { "java.lang.Math" }, { "max" }, max_builtin, 0 },
  87   { { "java.lang.Math" }, { "abs" }, abs_builtin, 0 },
  88   { { "java.lang.Math" }, { "acos" }, NULL, BUILT_IN_ACOS },
  89   { { "java.lang.Math" }, { "asin" }, NULL, BUILT_IN_ASIN },
  90   { { "java.lang.Math" }, { "atan" }, NULL, BUILT_IN_ATAN },
  91   { { "java.lang.Math" }, { "atan2" }, NULL, BUILT_IN_ATAN2 },
  92   { { "java.lang.Math" }, { "ceil" }, NULL, BUILT_IN_CEIL },
  93   { { "java.lang.Math" }, { "cos" }, NULL, BUILT_IN_COS },
  94   { { "java.lang.Math" }, { "exp" }, NULL, BUILT_IN_EXP },
  95   { { "java.lang.Math" }, { "floor" }, NULL, BUILT_IN_FLOOR },
  96   { { "java.lang.Math" }, { "log" }, NULL, BUILT_IN_LOG },
  97   { { "java.lang.Math" }, { "pow" }, NULL, BUILT_IN_POW },
  98   { { "java.lang.Math" }, { "sin" }, NULL, BUILT_IN_SIN },
  99   { { "java.lang.Math" }, { "sqrt" }, NULL, BUILT_IN_SQRT },
 100   { { "java.lang.Math" }, { "tan" }, NULL, BUILT_IN_TAN },
 101   { { "java.lang.Float" }, { "intBitsToFloat" }, convert_real, 0 },
 102   { { "java.lang.Double" }, { "longBitsToDouble" }, convert_real, 0 },
 103   { { "java.lang.Float" }, { "floatToRawIntBits" }, convert_real, 0 },
 104   { { "java.lang.Double" }, { "doubleToRawLongBits" }, convert_real, 0 },
 105   { { "sun.misc.Unsafe" }, { "putInt" }, putObject_builtin, 0},
 106   { { "sun.misc.Unsafe" }, { "putLong" }, putObject_builtin, 0},
 107   { { "sun.misc.Unsafe" }, { "putObject" }, putObject_builtin, 0},
 108   { { "sun.misc.Unsafe" }, { "compareAndSwapInt" },
 109     compareAndSwapInt_builtin, 0},
 110   { { "sun.misc.Unsafe" }, { "compareAndSwapLong" },
 111     compareAndSwapLong_builtin, 0},
 112   { { "sun.misc.Unsafe" }, { "compareAndSwapObject" },
 113     compareAndSwapObject_builtin, 0},
 114   { { "sun.misc.Unsafe" }, { "putOrderedInt" }, putVolatile_builtin, 0},
 115   { { "sun.misc.Unsafe" }, { "putOrderedLong" }, putVolatile_builtin, 0},
 116   { { "sun.misc.Unsafe" }, { "putOrderedObject" }, putVolatile_builtin, 0},
 117   { { "sun.misc.Unsafe" }, { "putIntVolatile" }, putVolatile_builtin, 0},
 118   { { "sun.misc.Unsafe" }, { "putLongVolatile" }, putVolatile_builtin, 0},
 119   { { "sun.misc.Unsafe" }, { "putObjectVolatile" }, putVolatile_builtin, 0},
 120   { { "sun.misc.Unsafe" }, { "getObjectVolatile" }, getVolatile_builtin, 0},
 121   { { "sun.misc.Unsafe" }, { "getIntVolatile" }, getVolatile_builtin, 0},
 122   { { "sun.misc.Unsafe" }, { "getLongVolatile" }, getVolatile_builtin, 0},
 123   { { "sun.misc.Unsafe" }, { "getLong" }, getVolatile_builtin, 0},
 124   { { NULL }, { NULL }, NULL, END_BUILTINS }
 125 };
 126
 127 \f
 128 /* Internal functions which implement various builtin conversions.  */
 129
 130 static tree
 131 max_builtin (tree method_return_type, tree method_arguments)
 132 {
 133   /* MAX_EXPR does not handle -0.0 in the Java style.  */
 134   if (TREE_CODE (method_return_type) == REAL_TYPE)
 135     return NULL_TREE;
 136   return fold_build2 (MAX_EXPR, method_return_type,
 137                       TREE_VALUE (method_arguments),
 138                       TREE_VALUE (TREE_CHAIN (method_arguments)));
 139 }
 140
 141 static tree
 142 min_builtin (tree method_return_type, tree method_arguments)
 143 {
 144   /* MIN_EXPR does not handle -0.0 in the Java style.  */
 145   if (TREE_CODE (method_return_type) == REAL_TYPE)
 146     return NULL_TREE;
 147   return fold_build2 (MIN_EXPR, method_return_type,
 148                       TREE_VALUE (method_arguments),
 149                       TREE_VALUE (TREE_CHAIN (method_arguments)));
 150 }
 151
 152 static tree
 153 abs_builtin (tree method_return_type, tree method_arguments)
 154 {
 155   return fold_build1 (ABS_EXPR, method_return_type,
 156                       TREE_VALUE (method_arguments));
 157 }
 158
 159 /* Mostly copied from ../builtins.c.  */
 160 static tree
 161 java_build_function_call_expr (tree fn, tree arglist)
 162 {
 163   tree call_expr;
 164
 165   call_expr = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (fn)), fn);
 166   return fold_build3 (CALL_EXPR, TREE_TYPE (TREE_TYPE (fn)),
 167                       call_expr, arglist, NULL_TREE);
 168 }
 169
 170 static tree
 171 convert_real (tree method_return_type, tree method_arguments)
 172 {
 173   return build1 (VIEW_CONVERT_EXPR, method_return_type,
 174                  TREE_VALUE (method_arguments));
 175 }
 176
 177 \f
 178
 179 /* Provide builtin support for atomic operations.  These are
 180    documented at length in libjava/sun/misc/Unsafe.java.  */
 181
 182 /* FIXME.  There are still a few things wrong with this logic.  In
 183    particular, atomic writes of multi-word integers are not truly
 184    atomic: this requires more work.
 185
 186    In general, double-word compare-and-swap cannot portably be
 187    implemented, so we need some kind of fallback for 32-bit machines.
 188
 189 */
 190
 191
 192 /* Macros to unmarshal arguments from a TREE_LIST into a few
 193    variables.  We also convert the offset arg from a long to an
 194    integer that is the same size as a pointer.  */
 195
 196 #define UNMARSHAL3(METHOD_ARGUMENTS)                                    \
 197 tree this_arg, obj_arg, offset_arg;                                     \
 198 do                                                                      \
 199 {                                                                       \
 200   tree chain = METHOD_ARGUMENTS;                                        \
 201   this_arg = TREE_VALUE (chain);                                        \
 202   chain = TREE_CHAIN (chain);                                           \
 203   obj_arg = TREE_VALUE (chain);                                         \
 204   chain = TREE_CHAIN (chain);                                           \
 205   offset_arg = fold_convert (java_type_for_size (POINTER_SIZE, 0),      \
 206                              TREE_VALUE (chain));                       \
 207 }                                                                       \
 208 while (0)
 209
 210 #define UNMARSHAL4(METHOD_ARGUMENTS)                                    \
 211 tree value_type, this_arg, obj_arg, offset_arg, value_arg;              \
 212 do                                                                      \
 213 {                                                                       \
 214   tree chain = METHOD_ARGUMENTS;                                        \
 215   this_arg = TREE_VALUE (chain);                                        \
 216   chain = TREE_CHAIN (chain);                                           \
 217   obj_arg = TREE_VALUE (chain);                                         \
 218   chain = TREE_CHAIN (chain);                                           \
 219   offset_arg = fold_convert (java_type_for_size (POINTER_SIZE, 0),      \
 220                              TREE_VALUE (chain));                       \
 221   chain = TREE_CHAIN (chain);                                           \
 222   value_arg = TREE_VALUE (chain);                                       \
 223   value_type = TREE_TYPE (value_arg);                                   \
 224 }                                                                       \
 225 while (0)
 226
 227 #define UNMARSHAL5(METHOD_ARGUMENTS)                                    \
 228 tree value_type, this_arg, obj_arg, offset_arg, expected_arg, value_arg; \
 229 do                                                                      \
 230 {                                                                       \
 231   tree chain = METHOD_ARGUMENTS;                                        \
 232   this_arg = TREE_VALUE (chain);                                        \
 233   chain = TREE_CHAIN (chain);                                           \
 234   obj_arg = TREE_VALUE (chain);                                         \
 235   chain = TREE_CHAIN (chain);                                           \
 236   offset_arg = fold_convert (java_type_for_size (POINTER_SIZE, 0),      \
 237                              TREE_VALUE (chain));                       \
 238   chain = TREE_CHAIN (chain);                                           \
 239   expected_arg = TREE_VALUE (chain);                                    \
 240   chain = TREE_CHAIN (chain);                                           \
 241   value_arg = TREE_VALUE (chain);                                       \
 242   value_type = TREE_TYPE (value_arg);                                   \
 243 }                                                                       \
 244 while (0)
 245
 246 /* Construct an arglist from a call.  */
 247
 248 static tree
 249 build_arglist_for_builtin (tree arg, ...)
 250 {
 251   va_list ap;
 252   tree nextarg;
 253   tree newarglist = build_tree_list (NULL_TREE, arg);
 254
 255   va_start(ap, arg);
 256   while ((nextarg = va_arg(ap, tree)))
 257     newarglist = tree_cons (NULL_TREE, nextarg, newarglist);
 258
 259   return nreverse (newarglist);
 260 }
 261
 262 /* Add an address to an offset, forming a sum.  */
 263
 264 static tree
 265 build_addr_sum (tree type, tree addr, tree offset)
 266 {
 267   tree ptr_type = build_pointer_type (type);
 268   return  fold_build2 (PLUS_EXPR,
 269                        ptr_type,
 270                        fold_convert (ptr_type, addr), offset);
 271 }
 272
 273 /* Make sure that this-arg is non-NULL.  This is a security check.  */
 274
 275 static tree
 276 build_check_this (tree stmt, tree this_arg)
 277 {
 278   return build2 (COMPOUND_EXPR, TREE_TYPE (stmt),
 279                  java_check_reference (this_arg, 1), stmt);
 280 }
 281
 282 /* Now the builtins.  These correspond to the primitive functions in
 283    libjava/sun/misc/natUnsafe.cc.  */
 284
 285 static tree
 286 putObject_builtin (tree method_return_type ATTRIBUTE_UNUSED,
 287                    tree method_arguments)
 288 {
 289   tree addr, stmt;
 290   UNMARSHAL4 (method_arguments);
 291
 292   addr = build_addr_sum (value_type, obj_arg, offset_arg);
 293   stmt = fold_build2 (MODIFY_EXPR, value_type,
 294                       build_java_indirect_ref (value_type, addr,
 295                                                flag_check_references),
 296                       value_arg);
 297
 298   return build_check_this (stmt, this_arg);
 299 }
 300
 301 static tree
 302 compareAndSwapInt_builtin (tree method_return_type ATTRIBUTE_UNUSED,
 303                            tree method_arguments)
 304 {
 305   enum machine_mode mode = TYPE_MODE (int_type_node);
 306   if (sync_compare_and_swap_cc[mode] != CODE_FOR_nothing
 307       || sync_compare_and_swap[mode] != CODE_FOR_nothing)
 308     {
 309       tree newarglist, addr, stmt;
 310       UNMARSHAL5 (method_arguments);
 311
 312       addr = build_addr_sum (int_type_node, obj_arg, offset_arg);
 313
 314       newarglist
 315         = build_arglist_for_builtin (addr, expected_arg, value_arg, NULL_TREE);
 316       stmt = (build_function_call_expr
 317               (built_in_decls[BUILT_IN_BOOL_COMPARE_AND_SWAP_4],
 318                newarglist));
 319
 320       return build_check_this (stmt, this_arg);
 321     }
 322   return NULL_TREE;
 323 }
 324
 325 static tree
 326 compareAndSwapLong_builtin (tree method_return_type ATTRIBUTE_UNUSED,
 327                             tree method_arguments)
 328 {
 329   enum machine_mode mode = TYPE_MODE (long_type_node);
 330   if (sync_compare_and_swap_cc[mode] != CODE_FOR_nothing
 331       || sync_compare_and_swap[mode] != CODE_FOR_nothing)
 332     {
 333       tree newarglist, addr, stmt;
 334       UNMARSHAL5 (method_arguments);
 335
 336       addr = build_addr_sum (long_type_node, obj_arg, offset_arg);
 337
 338       newarglist
 339         = build_arglist_for_builtin (addr, expected_arg, value_arg, NULL_TREE);
 340       stmt = (build_function_call_expr
 341               (built_in_decls[BUILT_IN_BOOL_COMPARE_AND_SWAP_8],
 342                newarglist));
 343
 344       return build_check_this (stmt, this_arg);
 345     }
 346   return NULL_TREE;
 347 }
 348 static tree
 349 compareAndSwapObject_builtin (tree method_return_type ATTRIBUTE_UNUSED,
 350                               tree method_arguments)
 351 {
 352   enum machine_mode mode = TYPE_MODE (ptr_type_node);
 353   if (sync_compare_and_swap_cc[mode] != CODE_FOR_nothing
 354       || sync_compare_and_swap[mode] != CODE_FOR_nothing)
 355   {
 356     tree newarglist, addr, stmt;
 357     int builtin;
 358
 359     UNMARSHAL5 (method_arguments);
 360     builtin = (POINTER_SIZE == 32
 361                ? BUILT_IN_BOOL_COMPARE_AND_SWAP_4
 362                : BUILT_IN_BOOL_COMPARE_AND_SWAP_8);
 363
 364     addr = build_addr_sum (value_type, obj_arg, offset_arg);
 365
 366     newarglist
 367       = build_arglist_for_builtin (addr, expected_arg, value_arg, NULL_TREE);
 368     stmt = (build_function_call_expr
 369             (built_in_decls[builtin],
 370              newarglist));
 371
 372     return build_check_this (stmt, this_arg);
 373   }
 374   return NULL_TREE;
 375 }
 376
 377 static tree
 378 putVolatile_builtin (tree method_return_type ATTRIBUTE_UNUSED,
 379                      tree method_arguments)
 380 {
 381   tree newarglist, addr, stmt, modify_stmt;
 382   UNMARSHAL4 (method_arguments);
 383
 384   addr = build_addr_sum (value_type, obj_arg, offset_arg);
 385   addr
 386     = fold_convert (build_pointer_type (build_type_variant (value_type, 0, 1)),
 387                     addr);
 388
 389   newarglist = NULL_TREE;
 390   stmt = (build_function_call_expr
 391           (built_in_decls[BUILT_IN_SYNCHRONIZE],
 392            newarglist));
 393   modify_stmt = fold_build2 (MODIFY_EXPR, value_type,
 394                              build_java_indirect_ref (value_type, addr,
 395                                                       flag_check_references),
 396                              value_arg);
 397   stmt = build2 (COMPOUND_EXPR, TREE_TYPE (modify_stmt),
 398                  stmt, modify_stmt);
 399
 400   return build_check_this (stmt, this_arg);
 401 }
 402
 403 static tree
 404 getVolatile_builtin (tree method_return_type ATTRIBUTE_UNUSED,
 405                      tree method_arguments)
 406 {
 407   tree newarglist, addr, stmt, modify_stmt, tmp;
 408   UNMARSHAL3 (method_arguments);
 409
 410   addr = build_addr_sum (method_return_type, obj_arg, offset_arg);
 411   addr
 412     = fold_convert (build_pointer_type (build_type_variant
 413                                         (method_return_type, 0, 1)), addr);
 414
 415   newarglist = NULL_TREE;
 416   stmt = (build_function_call_expr
 417           (built_in_decls[BUILT_IN_SYNCHRONIZE],
 418            newarglist));
 419
 420   tmp = build_decl (VAR_DECL, NULL, method_return_type);
 421   DECL_IGNORED_P (tmp) = 1;
 422   DECL_ARTIFICIAL (tmp) = 1;
 423   pushdecl (tmp);
 424
 425   modify_stmt = fold_build2 (MODIFY_EXPR, method_return_type,
 426                              tmp,
 427                              build_java_indirect_ref (method_return_type, addr,
 428                                                       flag_check_references));
 429
 430   stmt = build2 (COMPOUND_EXPR, void_type_node, modify_stmt, stmt);
 431   stmt = build2 (COMPOUND_EXPR, method_return_type, stmt, tmp);
 432
 433   return stmt;
 434 }
 435
 436 \f
 437
 438 #define BUILTIN_NOTHROW 1
 439 #define BUILTIN_CONST 2
 440 /* Define a single builtin.  */
 441 static void
 442 define_builtin (enum built_in_function val,
 443                 const char *name,
 444                 tree type,
 445                 const char *libname,
 446                 int flags)
 447 {
 448   tree decl;
 449
 450   decl = build_decl (FUNCTION_DECL, get_identifier (name), type);
 451   DECL_EXTERNAL (decl) = 1;
 452   TREE_PUBLIC (decl) = 1;
 453   SET_DECL_ASSEMBLER_NAME (decl, get_identifier (libname));
 454   pushdecl (decl);
 455   DECL_BUILT_IN_CLASS (decl) = BUILT_IN_NORMAL;
 456   DECL_FUNCTION_CODE (decl) = val;
 457   if (flags & BUILTIN_NOTHROW)
 458     TREE_NOTHROW (decl) = 1;
 459   if (flags & BUILTIN_CONST)
 460     TREE_READONLY (decl) = 1;
 461
 462   implicit_built_in_decls[val] = decl;
 463   built_in_decls[val] = decl;
 464 }
 465
 466 \f
 467
 468 /* Initialize the builtins.  */
 469 void
 470 initialize_builtins (void)
 471 {
 472   tree double_ftype_double, double_ftype_double_double;
 473   tree float_ftype_float, float_ftype_float_float;
 474   tree boolean_ftype_boolean_boolean;
 475   tree t;
 476   int i;
 477
 478   for (i = 0; java_builtins[i].builtin_code != END_BUILTINS; ++i)
 479     {
 480       tree klass_id = get_identifier (java_builtins[i].class_name.s);
 481       tree m = get_identifier (java_builtins[i].method_name.s);
 482
 483       java_builtins[i].class_name.t = klass_id;
 484       java_builtins[i].method_name.t = m;
 485     }
 486
 487   void_list_node = end_params_node;
 488
 489   t = tree_cons (NULL_TREE, float_type_node, end_params_node);
 490   float_ftype_float = build_function_type (float_type_node, t);
 491   t = tree_cons (NULL_TREE, float_type_node, t);
 492   float_ftype_float_float = build_function_type (float_type_node, t);
 493
 494   t = tree_cons (NULL_TREE, double_type_node, end_params_node);
 495   double_ftype_double = build_function_type (double_type_node, t);
 496   t = tree_cons (NULL_TREE, double_type_node, t);
 497   double_ftype_double_double = build_function_type (double_type_node, t);
 498
 499   define_builtin (BUILT_IN_FMOD, "__builtin_fmod",
 500                   double_ftype_double_double, "fmod", BUILTIN_CONST);
 501   define_builtin (BUILT_IN_FMODF, "__builtin_fmodf",
 502                   float_ftype_float_float, "fmodf", BUILTIN_CONST);
 503
 504   define_builtin (BUILT_IN_ACOS, "__builtin_acos",
 505                   double_ftype_double, "_ZN4java4lang4Math4acosEJdd",
 506                   BUILTIN_CONST);
 507   define_builtin (BUILT_IN_ASIN, "__builtin_asin",
 508                   double_ftype_double, "_ZN4java4lang4Math4asinEJdd",
 509                   BUILTIN_CONST);
 510   define_builtin (BUILT_IN_ATAN, "__builtin_atan",
 511                   double_ftype_double, "_ZN4java4lang4Math4atanEJdd",
 512                   BUILTIN_CONST);
 513   define_builtin (BUILT_IN_ATAN2, "__builtin_atan2",
 514                   double_ftype_double_double, "_ZN4java4lang4Math5atan2EJddd",
 515                   BUILTIN_CONST);
 516   define_builtin (BUILT_IN_CEIL, "__builtin_ceil",
 517                   double_ftype_double, "_ZN4java4lang4Math4ceilEJdd",
 518                   BUILTIN_CONST);
 519   define_builtin (BUILT_IN_COS, "__builtin_cos",
 520                   double_ftype_double, "_ZN4java4lang4Math3cosEJdd",
 521                   BUILTIN_CONST);
 522   define_builtin (BUILT_IN_EXP, "__builtin_exp",
 523                   double_ftype_double, "_ZN4java4lang4Math3expEJdd",
 524                   BUILTIN_CONST);
 525   define_builtin (BUILT_IN_FLOOR, "__builtin_floor",
 526                   double_ftype_double, "_ZN4java4lang4Math5floorEJdd",
 527                   BUILTIN_CONST);
 528   define_builtin (BUILT_IN_LOG, "__builtin_log",
 529                   double_ftype_double, "_ZN4java4lang4Math3logEJdd",
 530                   BUILTIN_CONST);
 531   define_builtin (BUILT_IN_POW, "__builtin_pow",
 532                   double_ftype_double_double, "_ZN4java4lang4Math3powEJddd",
 533                   BUILTIN_CONST);
 534   define_builtin (BUILT_IN_SIN, "__builtin_sin",
 535                   double_ftype_double, "_ZN4java4lang4Math3sinEJdd",
 536                   BUILTIN_CONST);
 537   define_builtin (BUILT_IN_SQRT, "__builtin_sqrt",
 538                   double_ftype_double, "_ZN4java4lang4Math4sqrtEJdd",
 539                   BUILTIN_CONST);
 540   define_builtin (BUILT_IN_TAN, "__builtin_tan",
 541                   double_ftype_double, "_ZN4java4lang4Math3tanEJdd",
 542                   BUILTIN_CONST);
 543
 544   t = tree_cons (NULL_TREE, boolean_type_node, end_params_node);
 545   t = tree_cons (NULL_TREE, boolean_type_node, t);
 546   boolean_ftype_boolean_boolean = build_function_type (boolean_type_node, t);
 547   define_builtin (BUILT_IN_EXPECT, "__builtin_expect",
 548                   boolean_ftype_boolean_boolean,
 549                   "__builtin_expect",
 550                   BUILTIN_CONST | BUILTIN_NOTHROW);
 551   define_builtin (BUILT_IN_BOOL_COMPARE_AND_SWAP_4,
 552                   "__sync_bool_compare_and_swap_4",
 553                   build_function_type_list (boolean_type_node,
 554                                             int_type_node,
 555                                             build_pointer_type (int_type_node),
 556                                             int_type_node, NULL_TREE),
 557                   "__sync_bool_compare_and_swap_4", 0);
 558   define_builtin (BUILT_IN_BOOL_COMPARE_AND_SWAP_8,
 559                   "__sync_bool_compare_and_swap_8",
 560                   build_function_type_list (boolean_type_node,
 561                                             long_type_node,
 562                                             build_pointer_type (long_type_node),
 563                                             int_type_node, NULL_TREE),
 564                   "__sync_bool_compare_and_swap_8", 0);
 565   define_builtin (BUILT_IN_SYNCHRONIZE, "__sync_synchronize",
 566                   build_function_type (void_type_node, void_list_node),
 567                   "__sync_synchronize", BUILTIN_NOTHROW);
 568
 569   define_builtin (BUILT_IN_RETURN_ADDRESS, "__builtin_return_address",
 570                   build_function_type_list (ptr_type_node, int_type_node, NULL_TREE),
 571                   "__builtin_return_address", BUILTIN_NOTHROW);
 572
 573   build_common_builtin_nodes ();
 574 }
 575
 576 /* If the call matches a builtin, return the
 577    appropriate builtin expression instead.  */
 578 tree
 579 check_for_builtin (tree method, tree call)
 580 {
 581   if (! flag_emit_class_files && optimize && TREE_CODE (call) == CALL_EXPR)
 582     {
 583       int i;
 584       tree method_arguments = TREE_OPERAND (call, 1);
 585       tree method_class = DECL_NAME (TYPE_NAME (DECL_CONTEXT (method)));
 586       tree method_name = DECL_NAME (method);
 587       tree method_return_type = TREE_TYPE (TREE_TYPE (method));
 588
 589       for (i = 0; java_builtins[i].builtin_code != END_BUILTINS; ++i)
 590         {
 591           if (method_class == java_builtins[i].class_name.t
 592               && method_name == java_builtins[i].method_name.t)
 593             {
 594               tree fn;
 595
 596               if (java_builtins[i].creator != NULL)
 597                 {
 598                   tree result
 599                     = (*java_builtins[i].creator) (method_return_type,
 600                                                    method_arguments);
 601                   return result == NULL_TREE ? call : result;
 602                 }
 603
 604               /* Builtin functions emit a direct call which is incompatible
 605                  with the BC-ABI.  */
 606               if (flag_indirect_dispatch)
 607                 return call;
 608               fn = built_in_decls[java_builtins[i].builtin_code];
 609               if (fn == NULL_TREE)
 610                 return call;
 611               return java_build_function_call_expr (fn, method_arguments);
 612             }
 613         }
 614     }
 615   return call;
 616 }
 617
 618 #include "gt-java-builtins.h"