gcc/java/builtins.c

   1 /* Built-in and inline functions for gcj
   2    Copyright (C) 2001, 2003, 2004, 2005, 2006, 2007, 2009
   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 3, 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 .
  18
  19 .
  20
  21 Java and all Java-based marks are trademarks or registered trademarks
  22 of Sun Microsystems, Inc. in the United States and other countries.
  23 The Free Software Foundation is independent of Sun Microsystems, Inc.  */
  24
  25 /* Written by Tom Tromey <tromey@redhat.com>.  */
  26
  27 #include "config.h"
  28 #include "system.h"
  29 #include "coretypes.h"
  30 #include "tm.h"
  31 #include "tree.h"
  32 #include "ggc.h"
  33 #include "flags.h"
  34 #include "langhooks.h"
  35 #include "java-tree.h"
  36 #include <stdarg.h>
  37 #include "convert.h"
  38 #include "rtl.h"
  39 #include "insn-codes.h"
  40 #include "expr.h"
  41 #include "optabs.h"
  42
  43 static tree max_builtin (tree, tree);
  44 static tree min_builtin (tree, tree);
  45 static tree abs_builtin (tree, tree);
  46 static tree convert_real (tree, tree);
  47
  48 static tree java_build_function_call_expr (tree, tree);
  49
  50 static tree putObject_builtin (tree, tree);
  51 static tree compareAndSwapInt_builtin (tree, tree);
  52 static tree compareAndSwapLong_builtin (tree, tree);
  53 static tree compareAndSwapObject_builtin (tree, tree);
  54 static tree putVolatile_builtin (tree, tree);
  55 static tree getVolatile_builtin (tree, tree);
  56 static tree VMSupportsCS8_builtin (tree, tree);
  57 \f
  58
  59 /* Functions of this type are used to inline a given call.  Such a
  60    function should either return an expression, if the call is to be
  61    inlined, or NULL_TREE if a real call should be emitted.  Arguments
  62    are method return type and the original CALL_EXPR containing the
  63    arguments to the call.  */
  64 typedef tree builtin_creator_function (tree, tree);
  65
  66 /* Hold a char*, before initialization, or a tree, after
  67    initialization.  */
  68 union GTY(()) string_or_tree {
  69   const char * GTY ((tag ("0"))) s;
  70   tree GTY ((tag ("1"))) t;
  71 };
  72
  73 /* Used to hold a single builtin record.  */
  74 struct GTY(()) builtin_record {
  75   union string_or_tree GTY ((desc ("1"))) class_name;
  76   union string_or_tree GTY ((desc ("1"))) method_name;
  77   builtin_creator_function * GTY((skip)) creator;
  78   enum built_in_function builtin_code;
  79 };
  80
  81 static GTY(()) struct builtin_record java_builtins[] =
  82 {
  83   { { "java.lang.Math" }, { "min" }, min_builtin, 0 },
  84   { { "java.lang.Math" }, { "max" }, max_builtin, 0 },
  85   { { "java.lang.Math" }, { "abs" }, abs_builtin, 0 },
  86   { { "java.lang.Math" }, { "acos" }, NULL, BUILT_IN_ACOS },
  87   { { "java.lang.Math" }, { "asin" }, NULL, BUILT_IN_ASIN },
  88   { { "java.lang.Math" }, { "atan" }, NULL, BUILT_IN_ATAN },
  89   { { "java.lang.Math" }, { "atan2" }, NULL, BUILT_IN_ATAN2 },
  90   { { "java.lang.Math" }, { "ceil" }, NULL, BUILT_IN_CEIL },
  91   { { "java.lang.Math" }, { "cos" }, NULL, BUILT_IN_COS },
  92   { { "java.lang.Math" }, { "exp" }, NULL, BUILT_IN_EXP },
  93   { { "java.lang.Math" }, { "floor" }, NULL, BUILT_IN_FLOOR },
  94   { { "java.lang.Math" }, { "log" }, NULL, BUILT_IN_LOG },
  95   { { "java.lang.Math" }, { "pow" }, NULL, BUILT_IN_POW },
  96   { { "java.lang.Math" }, { "sin" }, NULL, BUILT_IN_SIN },
  97   { { "java.lang.Math" }, { "sqrt" }, NULL, BUILT_IN_SQRT },
  98   { { "java.lang.Math" }, { "tan" }, NULL, BUILT_IN_TAN },
  99   { { "java.lang.Float" }, { "intBitsToFloat" }, convert_real, 0 },
 100   { { "java.lang.Double" }, { "longBitsToDouble" }, convert_real, 0 },
 101   { { "java.lang.Float" }, { "floatToRawIntBits" }, convert_real, 0 },
 102   { { "java.lang.Double" }, { "doubleToRawLongBits" }, convert_real, 0 },
 103   { { "sun.misc.Unsafe" }, { "putInt" }, putObject_builtin, 0},
 104   { { "sun.misc.Unsafe" }, { "putLong" }, putObject_builtin, 0},
 105   { { "sun.misc.Unsafe" }, { "putObject" }, putObject_builtin, 0},
 106   { { "sun.misc.Unsafe" }, { "compareAndSwapInt" },
 107     compareAndSwapInt_builtin, 0},
 108   { { "sun.misc.Unsafe" }, { "compareAndSwapLong" },
 109     compareAndSwapLong_builtin, 0},
 110   { { "sun.misc.Unsafe" }, { "compareAndSwapObject" },
 111     compareAndSwapObject_builtin, 0},
 112   { { "sun.misc.Unsafe" }, { "putOrderedInt" }, putVolatile_builtin, 0},
 113   { { "sun.misc.Unsafe" }, { "putOrderedLong" }, putVolatile_builtin, 0},
 114   { { "sun.misc.Unsafe" }, { "putOrderedObject" }, putVolatile_builtin, 0},
 115   { { "sun.misc.Unsafe" }, { "putIntVolatile" }, putVolatile_builtin, 0},
 116   { { "sun.misc.Unsafe" }, { "putLongVolatile" }, putVolatile_builtin, 0},
 117   { { "sun.misc.Unsafe" }, { "putObjectVolatile" }, putVolatile_builtin, 0},
 118   { { "sun.misc.Unsafe" }, { "getObjectVolatile" }, getVolatile_builtin, 0},
 119   { { "sun.misc.Unsafe" }, { "getIntVolatile" }, getVolatile_builtin, 0},
 120   { { "sun.misc.Unsafe" }, { "getLongVolatile" }, getVolatile_builtin, 0},
 121   { { "sun.misc.Unsafe" }, { "getLong" }, getVolatile_builtin, 0},
 122   { { "java.util.concurrent.atomic.AtomicLong" }, { "VMSupportsCS8" },
 123     VMSupportsCS8_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 orig_call)
 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                       CALL_EXPR_ARG (orig_call, 0),
 138                       CALL_EXPR_ARG (orig_call, 1));
 139 }
 140
 141 static tree
 142 min_builtin (tree method_return_type, tree orig_call)
 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                       CALL_EXPR_ARG (orig_call, 0),
 149                       CALL_EXPR_ARG (orig_call, 1));
 150 }
 151
 152 static tree
 153 abs_builtin (tree method_return_type, tree orig_call)
 154 {
 155   return fold_build1 (ABS_EXPR, method_return_type,
 156                       CALL_EXPR_ARG (orig_call, 0));
 157 }
 158
 159 /* Construct a new call to FN using the arguments from ORIG_CALL.  */
 160
 161 static tree
 162 java_build_function_call_expr (tree fn, tree orig_call)
 163 {
 164   int nargs = call_expr_nargs (orig_call);
 165   switch (nargs)
 166     {
 167       /* Although we could handle the 0-3 argument cases using the general
 168          logic in the default case, splitting them out permits folding to
 169          be performed without constructing a temporary CALL_EXPR.  */
 170     case 0:
 171       return build_call_expr (fn, 0);
 172     case 1:
 173       return build_call_expr (fn, 1, CALL_EXPR_ARG (orig_call, 0));
 174     case 2:
 175       return build_call_expr (fn, 2,
 176                               CALL_EXPR_ARG (orig_call, 0),
 177                               CALL_EXPR_ARG (orig_call, 1));
 178     case 3:
 179       return build_call_expr (fn, 3,
 180                               CALL_EXPR_ARG (orig_call, 0),
 181                               CALL_EXPR_ARG (orig_call, 1),
 182                               CALL_EXPR_ARG (orig_call, 2));
 183     default:
 184       {
 185         tree fntype = TREE_TYPE (fn);
 186         fn = build1 (ADDR_EXPR, build_pointer_type (fntype), fn);
 187         return fold (build_call_array (TREE_TYPE (fntype),
 188                                        fn, nargs, CALL_EXPR_ARGP (orig_call)));
 189       }
 190     }
 191 }
 192
 193 static tree
 194 convert_real (tree method_return_type, tree orig_call)
 195 {
 196   return build1 (VIEW_CONVERT_EXPR, method_return_type,
 197                  CALL_EXPR_ARG (orig_call, 0));
 198 }
 199
 200 \f
 201
 202 /* Provide builtin support for atomic operations.  These are
 203    documented at length in libjava/sun/misc/Unsafe.java.  */
 204
 205 /* FIXME.  There are still a few things wrong with this logic.  In
 206    particular, atomic writes of multi-word integers are not truly
 207    atomic: this requires more work.
 208
 209    In general, double-word compare-and-swap cannot portably be
 210    implemented, so we need some kind of fallback for 32-bit machines.
 211
 212 */
 213
 214
 215 /* Macros to unmarshal arguments from a CALL_EXPR into a few
 216    variables.  We also convert the offset arg from a long to an
 217    integer that is the same size as a pointer.  */
 218
 219 #define UNMARSHAL3(METHOD_CALL)                                 \
 220 tree this_arg, obj_arg, offset_arg;                                     \
 221 do                                                                      \
 222 {                                                                       \
 223   tree orig_method_call = METHOD_CALL;                                  \
 224   this_arg = CALL_EXPR_ARG (orig_method_call, 0);                       \
 225   obj_arg = CALL_EXPR_ARG (orig_method_call, 1);                        \
 226   offset_arg = fold_convert (java_type_for_size (POINTER_SIZE, 0),      \
 227                              CALL_EXPR_ARG (orig_method_call, 2));      \
 228 }                                                                       \
 229 while (0)
 230
 231 #define UNMARSHAL4(METHOD_CALL)                                 \
 232 tree value_type, this_arg, obj_arg, offset_arg, value_arg;              \
 233 do                                                                      \
 234 {                                                                       \
 235   tree orig_method_call = METHOD_CALL;                                  \
 236   this_arg = CALL_EXPR_ARG (orig_method_call, 0);                       \
 237   obj_arg = CALL_EXPR_ARG (orig_method_call, 1);                        \
 238   offset_arg = fold_convert (java_type_for_size (POINTER_SIZE, 0),      \
 239                              CALL_EXPR_ARG (orig_method_call, 2));      \
 240   value_arg = CALL_EXPR_ARG (orig_method_call, 3);                      \
 241   value_type = TREE_TYPE (value_arg);                                   \
 242 }                                                                       \
 243 while (0)
 244
 245 #define UNMARSHAL5(METHOD_CALL)                                 \
 246 tree value_type, this_arg, obj_arg, offset_arg, expected_arg, value_arg; \
 247 do                                                                      \
 248 {                                                                       \
 249   tree orig_method_call = METHOD_CALL;                                  \
 250   this_arg = CALL_EXPR_ARG (orig_method_call, 0);                       \
 251   obj_arg = CALL_EXPR_ARG (orig_method_call, 1);                        \
 252   offset_arg = fold_convert (java_type_for_size (POINTER_SIZE, 0),      \
 253                              CALL_EXPR_ARG (orig_method_call, 2));      \
 254   expected_arg = CALL_EXPR_ARG (orig_method_call, 3);                   \
 255   value_arg = CALL_EXPR_ARG (orig_method_call, 4);                      \
 256   value_type = TREE_TYPE (value_arg);                                   \
 257 }                                                                       \
 258 while (0)
 259
 260 /* Add an address to an offset, forming a sum.  */
 261
 262 static tree
 263 build_addr_sum (tree type, tree addr, tree offset)
 264 {
 265   tree ptr_type = build_pointer_type (type);
 266   return fold_build2 (POINTER_PLUS_EXPR,
 267                       ptr_type,
 268                       fold_convert (ptr_type, addr),
 269                       fold_convert (sizetype, offset));
 270 }
 271
 272 /* Make sure that this-arg is non-NULL.  This is a security check.  */
 273
 274 static tree
 275 build_check_this (tree stmt, tree this_arg)
 276 {
 277   return build2 (COMPOUND_EXPR, TREE_TYPE (stmt),
 278                  java_check_reference (this_arg, 1), stmt);
 279 }
 280
 281 /* Now the builtins.  These correspond to the primitive functions in
 282    libjava/sun/misc/natUnsafe.cc.  */
 283
 284 static tree
 285 putObject_builtin (tree method_return_type ATTRIBUTE_UNUSED,
 286                    tree orig_call)
 287 {
 288   tree addr, stmt;
 289   UNMARSHAL4 (orig_call);
 290
 291   addr = build_addr_sum (value_type, obj_arg, offset_arg);
 292   stmt = fold_build2 (MODIFY_EXPR, value_type,
 293                       build_java_indirect_ref (value_type, addr,
 294                                                flag_check_references),
 295                       value_arg);
 296
 297   return build_check_this (stmt, this_arg);
 298 }
 299
 300 static tree
 301 compareAndSwapInt_builtin (tree method_return_type ATTRIBUTE_UNUSED,
 302                            tree orig_call)
 303 {
 304   enum machine_mode mode = TYPE_MODE (int_type_node);
 305   if (sync_compare_and_swap[mode] != CODE_FOR_nothing)
 306     {
 307       tree addr, stmt;
 308       UNMARSHAL5 (orig_call);
 309
 310       addr = build_addr_sum (int_type_node, obj_arg, offset_arg);
 311       stmt = build_call_expr (built_in_decls[BUILT_IN_BOOL_COMPARE_AND_SWAP_4],
 312                               3, addr, expected_arg, value_arg);
 313
 314       return build_check_this (stmt, this_arg);
 315     }
 316   return NULL_TREE;
 317 }
 318
 319 static tree
 320 compareAndSwapLong_builtin (tree method_return_type ATTRIBUTE_UNUSED,
 321                             tree orig_call)
 322 {
 323   enum machine_mode mode = TYPE_MODE (long_type_node);
 324   if (sync_compare_and_swap[mode] != CODE_FOR_nothing)
 325     {
 326       tree addr, stmt;
 327       UNMARSHAL5 (orig_call);
 328
 329       addr = build_addr_sum (long_type_node, obj_arg, offset_arg);
 330       stmt = build_call_expr (built_in_decls[BUILT_IN_BOOL_COMPARE_AND_SWAP_8],
 331                               3, addr, expected_arg, value_arg);
 332
 333       return build_check_this (stmt, this_arg);
 334     }
 335   return NULL_TREE;
 336 }
 337 static tree
 338 compareAndSwapObject_builtin (tree method_return_type ATTRIBUTE_UNUSED,
 339                               tree orig_call)
 340 {
 341   enum machine_mode mode = TYPE_MODE (ptr_type_node);
 342   if (sync_compare_and_swap[mode] != CODE_FOR_nothing)
 343   {
 344     tree addr, stmt;
 345     int builtin;
 346
 347     UNMARSHAL5 (orig_call);
 348     builtin = (POINTER_SIZE == 32
 349                ? BUILT_IN_BOOL_COMPARE_AND_SWAP_4
 350                : BUILT_IN_BOOL_COMPARE_AND_SWAP_8);
 351
 352     addr = build_addr_sum (value_type, obj_arg, offset_arg);
 353     stmt = build_call_expr (built_in_decls[builtin],
 354                             3, addr, expected_arg, value_arg);
 355
 356     return build_check_this (stmt, this_arg);
 357   }
 358   return NULL_TREE;
 359 }
 360
 361 static tree
 362 putVolatile_builtin (tree method_return_type ATTRIBUTE_UNUSED,
 363                      tree orig_call)
 364 {
 365   tree addr, stmt, modify_stmt;
 366   UNMARSHAL4 (orig_call);
 367
 368   addr = build_addr_sum (value_type, obj_arg, offset_arg);
 369   addr
 370     = fold_convert (build_pointer_type (build_type_variant (value_type, 0, 1)),
 371                     addr);
 372
 373   stmt = build_call_expr (built_in_decls[BUILT_IN_SYNCHRONIZE], 0);
 374   modify_stmt = fold_build2 (MODIFY_EXPR, value_type,
 375                              build_java_indirect_ref (value_type, addr,
 376                                                       flag_check_references),
 377                              value_arg);
 378   stmt = build2 (COMPOUND_EXPR, TREE_TYPE (modify_stmt),
 379                  stmt, modify_stmt);
 380
 381   return build_check_this (stmt, this_arg);
 382 }
 383
 384 static tree
 385 getVolatile_builtin (tree method_return_type ATTRIBUTE_UNUSED,
 386                      tree orig_call)
 387 {
 388   tree addr, stmt, modify_stmt, tmp;
 389   UNMARSHAL3 (orig_call);
 390
 391   addr = build_addr_sum (method_return_type, obj_arg, offset_arg);
 392   addr
 393     = fold_convert (build_pointer_type (build_type_variant
 394                                         (method_return_type, 0, 1)), addr);
 395
 396   stmt = build_call_expr (built_in_decls[BUILT_IN_SYNCHRONIZE], 0);
 397
 398   tmp = build_decl (VAR_DECL, NULL, method_return_type);
 399   DECL_IGNORED_P (tmp) = 1;
 400   DECL_ARTIFICIAL (tmp) = 1;
 401   pushdecl (tmp);
 402
 403   modify_stmt = fold_build2 (MODIFY_EXPR, method_return_type,
 404                              tmp,
 405                              build_java_indirect_ref (method_return_type, addr,
 406                                                       flag_check_references));
 407
 408   stmt = build2 (COMPOUND_EXPR, void_type_node, modify_stmt, stmt);
 409   stmt = build2 (COMPOUND_EXPR, method_return_type, stmt, tmp);
 410
 411   return stmt;
 412 }
 413
 414 static tree
 415 VMSupportsCS8_builtin (tree method_return_type,
 416                        tree orig_call ATTRIBUTE_UNUSED)
 417 {
 418   enum machine_mode mode = TYPE_MODE (long_type_node);
 419   gcc_assert (method_return_type == boolean_type_node);
 420   if (sync_compare_and_swap[mode] != CODE_FOR_nothing)
 421     return boolean_true_node;
 422   else
 423     return boolean_false_node;
 424 }
 425
 426 \f
 427
 428 #define BUILTIN_NOTHROW 1
 429 #define BUILTIN_CONST 2
 430 /* Define a single builtin.  */
 431 static void
 432 define_builtin (enum built_in_function val,
 433                 const char *name,
 434                 tree type,
 435                 const char *libname,
 436                 int flags)
 437 {
 438   tree decl;
 439
 440   decl = build_decl (FUNCTION_DECL, get_identifier (name), type);
 441   DECL_EXTERNAL (decl) = 1;
 442   TREE_PUBLIC (decl) = 1;
 443   SET_DECL_ASSEMBLER_NAME (decl, get_identifier (libname));
 444   pushdecl (decl);
 445   DECL_BUILT_IN_CLASS (decl) = BUILT_IN_NORMAL;
 446   DECL_FUNCTION_CODE (decl) = val;
 447   if (flags & BUILTIN_NOTHROW)
 448     TREE_NOTHROW (decl) = 1;
 449   if (flags & BUILTIN_CONST)
 450     TREE_READONLY (decl) = 1;
 451
 452   implicit_built_in_decls[val] = decl;
 453   built_in_decls[val] = decl;
 454 }
 455
 456 \f
 457
 458 /* Initialize the builtins.  */
 459 void
 460 initialize_builtins (void)
 461 {
 462   tree double_ftype_double, double_ftype_double_double;
 463   tree float_ftype_float, float_ftype_float_float;
 464   tree boolean_ftype_boolean_boolean;
 465   tree t;
 466   int i;
 467
 468   for (i = 0; java_builtins[i].builtin_code != END_BUILTINS; ++i)
 469     {
 470       tree klass_id = get_identifier (java_builtins[i].class_name.s);
 471       tree m = get_identifier (java_builtins[i].method_name.s);
 472
 473       java_builtins[i].class_name.t = klass_id;
 474       java_builtins[i].method_name.t = m;
 475     }
 476
 477   void_list_node = end_params_node;
 478
 479   t = tree_cons (NULL_TREE, float_type_node, end_params_node);
 480   float_ftype_float = build_function_type (float_type_node, t);
 481   t = tree_cons (NULL_TREE, float_type_node, t);
 482   float_ftype_float_float = build_function_type (float_type_node, t);
 483
 484   t = tree_cons (NULL_TREE, double_type_node, end_params_node);
 485   double_ftype_double = build_function_type (double_type_node, t);
 486   t = tree_cons (NULL_TREE, double_type_node, t);
 487   double_ftype_double_double = build_function_type (double_type_node, t);
 488
 489   define_builtin (BUILT_IN_FMOD, "__builtin_fmod",
 490                   double_ftype_double_double, "fmod", BUILTIN_CONST);
 491   define_builtin (BUILT_IN_FMODF, "__builtin_fmodf",
 492                   float_ftype_float_float, "fmodf", BUILTIN_CONST);
 493
 494   define_builtin (BUILT_IN_ACOS, "__builtin_acos",
 495                   double_ftype_double, "_ZN4java4lang4Math4acosEJdd",
 496                   BUILTIN_CONST);
 497   define_builtin (BUILT_IN_ASIN, "__builtin_asin",
 498                   double_ftype_double, "_ZN4java4lang4Math4asinEJdd",
 499                   BUILTIN_CONST);
 500   define_builtin (BUILT_IN_ATAN, "__builtin_atan",
 501                   double_ftype_double, "_ZN4java4lang4Math4atanEJdd",
 502                   BUILTIN_CONST);
 503   define_builtin (BUILT_IN_ATAN2, "__builtin_atan2",
 504                   double_ftype_double_double, "_ZN4java4lang4Math5atan2EJddd",
 505                   BUILTIN_CONST);
 506   define_builtin (BUILT_IN_CEIL, "__builtin_ceil",
 507                   double_ftype_double, "_ZN4java4lang4Math4ceilEJdd",
 508                   BUILTIN_CONST);
 509   define_builtin (BUILT_IN_COS, "__builtin_cos",
 510                   double_ftype_double, "_ZN4java4lang4Math3cosEJdd",
 511                   BUILTIN_CONST);
 512   define_builtin (BUILT_IN_EXP, "__builtin_exp",
 513                   double_ftype_double, "_ZN4java4lang4Math3expEJdd",
 514                   BUILTIN_CONST);
 515   define_builtin (BUILT_IN_FLOOR, "__builtin_floor",
 516                   double_ftype_double, "_ZN4java4lang4Math5floorEJdd",
 517                   BUILTIN_CONST);
 518   define_builtin (BUILT_IN_LOG, "__builtin_log",
 519                   double_ftype_double, "_ZN4java4lang4Math3logEJdd",
 520                   BUILTIN_CONST);
 521   define_builtin (BUILT_IN_POW, "__builtin_pow",
 522                   double_ftype_double_double, "_ZN4java4lang4Math3powEJddd",
 523                   BUILTIN_CONST);
 524   define_builtin (BUILT_IN_SIN, "__builtin_sin",
 525                   double_ftype_double, "_ZN4java4lang4Math3sinEJdd",
 526                   BUILTIN_CONST);
 527   define_builtin (BUILT_IN_SQRT, "__builtin_sqrt",
 528                   double_ftype_double, "_ZN4java4lang4Math4sqrtEJdd",
 529                   BUILTIN_CONST);
 530   define_builtin (BUILT_IN_TAN, "__builtin_tan",
 531                   double_ftype_double, "_ZN4java4lang4Math3tanEJdd",
 532                   BUILTIN_CONST);
 533
 534   t = tree_cons (NULL_TREE, boolean_type_node, end_params_node);
 535   t = tree_cons (NULL_TREE, boolean_type_node, t);
 536   boolean_ftype_boolean_boolean = build_function_type (boolean_type_node, t);
 537   define_builtin (BUILT_IN_EXPECT, "__builtin_expect",
 538                   boolean_ftype_boolean_boolean,
 539                   "__builtin_expect",
 540                   BUILTIN_CONST | BUILTIN_NOTHROW);
 541   define_builtin (BUILT_IN_BOOL_COMPARE_AND_SWAP_4,
 542                   "__sync_bool_compare_and_swap_4",
 543                   build_function_type_list (boolean_type_node,
 544                                             int_type_node,
 545                                             build_pointer_type (int_type_node),
 546                                             int_type_node, NULL_TREE),
 547                   "__sync_bool_compare_and_swap_4", 0);
 548   define_builtin (BUILT_IN_BOOL_COMPARE_AND_SWAP_8,
 549                   "__sync_bool_compare_and_swap_8",
 550                   build_function_type_list (boolean_type_node,
 551                                             long_type_node,
 552                                             build_pointer_type (long_type_node),
 553                                             int_type_node, NULL_TREE),
 554                   "__sync_bool_compare_and_swap_8", 0);
 555   define_builtin (BUILT_IN_SYNCHRONIZE, "__sync_synchronize",
 556                   build_function_type (void_type_node, void_list_node),
 557                   "__sync_synchronize", BUILTIN_NOTHROW);
 558
 559   define_builtin (BUILT_IN_RETURN_ADDRESS, "__builtin_return_address",
 560                   build_function_type_list (ptr_type_node, int_type_node, NULL_TREE),
 561                   "__builtin_return_address", BUILTIN_NOTHROW);
 562
 563   build_common_builtin_nodes ();
 564 }
 565
 566 /* If the call matches a builtin, return the
 567    appropriate builtin expression instead.  */
 568 tree
 569 check_for_builtin (tree method, tree call)
 570 {
 571   if (optimize && TREE_CODE (call) == CALL_EXPR)
 572     {
 573       int i;
 574       tree method_class = DECL_NAME (TYPE_NAME (DECL_CONTEXT (method)));
 575       tree method_name = DECL_NAME (method);
 576       tree method_return_type = TREE_TYPE (TREE_TYPE (method));
 577
 578       for (i = 0; java_builtins[i].builtin_code != END_BUILTINS; ++i)
 579         {
 580           if (method_class == java_builtins[i].class_name.t
 581               && method_name == java_builtins[i].method_name.t)
 582             {
 583               tree fn;
 584
 585               if (java_builtins[i].creator != NULL)
 586                 {
 587                   tree result
 588                     = (*java_builtins[i].creator) (method_return_type, call);
 589                   return result == NULL_TREE ? call : result;
 590                 }
 591
 592               /* Builtin functions emit a direct call which is incompatible
 593                  with the BC-ABI.  */
 594               if (flag_indirect_dispatch)
 595                 return call;
 596               fn = built_in_decls[java_builtins[i].builtin_code];
 597               if (fn == NULL_TREE)
 598                 return call;
 599               return java_build_function_call_expr (fn, call);
 600             }
 601         }
 602     }
 603   return call;
 604 }
 605
 606 #include "gt-java-builtins.h"