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 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   { { "java.util.concurrent.atomic.AtomicLong" }, { "VMSupportsCS8" },
 125     VMSupportsCS8_builtin, 0},
 126   { { NULL }, { NULL }, NULL, END_BUILTINS }
 127 };
 128
 129 \f
 130 /* Internal functions which implement various builtin conversions.  */
 131
 132 static tree
 133 max_builtin (tree method_return_type, tree orig_call)
 134 {
 135   /* MAX_EXPR does not handle -0.0 in the Java style.  */
 136   if (TREE_CODE (method_return_type) == REAL_TYPE)
 137     return NULL_TREE;
 138   return fold_build2 (MAX_EXPR, method_return_type,
 139                       CALL_EXPR_ARG (orig_call, 0),
 140                       CALL_EXPR_ARG (orig_call, 1));
 141 }
 142
 143 static tree
 144 min_builtin (tree method_return_type, tree orig_call)
 145 {
 146   /* MIN_EXPR does not handle -0.0 in the Java style.  */
 147   if (TREE_CODE (method_return_type) == REAL_TYPE)
 148     return NULL_TREE;
 149   return fold_build2 (MIN_EXPR, method_return_type,
 150                       CALL_EXPR_ARG (orig_call, 0),
 151                       CALL_EXPR_ARG (orig_call, 1));
 152 }
 153
 154 static tree
 155 abs_builtin (tree method_return_type, tree orig_call)
 156 {
 157   return fold_build1 (ABS_EXPR, method_return_type,
 158                       CALL_EXPR_ARG (orig_call, 0));
 159 }
 160
 161 /* Construct a new call to FN using the arguments from ORIG_CALL.  */
 162
 163 static tree
 164 java_build_function_call_expr (tree fn, tree orig_call)
 165 {
 166   int nargs = call_expr_nargs (orig_call);
 167   switch (nargs)
 168     {
 169       /* Although we could handle the 0-3 argument cases using the general
 170          logic in the default case, splitting them out permits folding to
 171          be performed without constructing a temporary CALL_EXPR.  */
 172     case 0:
 173       return build_call_expr (fn, 0);
 174     case 1:
 175       return build_call_expr (fn, 1, CALL_EXPR_ARG (orig_call, 0));
 176     case 2:
 177       return build_call_expr (fn, 2,
 178                               CALL_EXPR_ARG (orig_call, 0),
 179                               CALL_EXPR_ARG (orig_call, 1));
 180     case 3:
 181       return build_call_expr (fn, 3,
 182                               CALL_EXPR_ARG (orig_call, 0),
 183                               CALL_EXPR_ARG (orig_call, 1),
 184                               CALL_EXPR_ARG (orig_call, 2));
 185     default:
 186       {
 187         tree fntype = TREE_TYPE (fn);
 188         fn = build1 (ADDR_EXPR, build_pointer_type (fntype), fn);
 189         return fold (build_call_array (TREE_TYPE (fntype),
 190                                        fn, nargs, CALL_EXPR_ARGP (orig_call)));
 191       }
 192     }
 193 }
 194
 195 static tree
 196 convert_real (tree method_return_type, tree orig_call)
 197 {
 198   return build1 (VIEW_CONVERT_EXPR, method_return_type,
 199                  CALL_EXPR_ARG (orig_call, 0));
 200 }
 201
 202 \f
 203
 204 /* Provide builtin support for atomic operations.  These are
 205    documented at length in libjava/sun/misc/Unsafe.java.  */
 206
 207 /* FIXME.  There are still a few things wrong with this logic.  In
 208    particular, atomic writes of multi-word integers are not truly
 209    atomic: this requires more work.
 210
 211    In general, double-word compare-and-swap cannot portably be
 212    implemented, so we need some kind of fallback for 32-bit machines.
 213
 214 */
 215
 216
 217 /* Macros to unmarshal arguments from a CALL_EXPR into a few
 218    variables.  We also convert the offset arg from a long to an
 219    integer that is the same size as a pointer.  */
 220
 221 #define UNMARSHAL3(METHOD_CALL)                                 \
 222 tree this_arg, obj_arg, offset_arg;                                     \
 223 do                                                                      \
 224 {                                                                       \
 225   tree orig_method_call = METHOD_CALL;                                  \
 226   this_arg = CALL_EXPR_ARG (orig_method_call, 0);                       \
 227   obj_arg = CALL_EXPR_ARG (orig_method_call, 1);                        \
 228   offset_arg = fold_convert (java_type_for_size (POINTER_SIZE, 0),      \
 229                              CALL_EXPR_ARG (orig_method_call, 2));      \
 230 }                                                                       \
 231 while (0)
 232
 233 #define UNMARSHAL4(METHOD_CALL)                                 \
 234 tree value_type, this_arg, obj_arg, offset_arg, value_arg;              \
 235 do                                                                      \
 236 {                                                                       \
 237   tree orig_method_call = METHOD_CALL;                                  \
 238   this_arg = CALL_EXPR_ARG (orig_method_call, 0);                       \
 239   obj_arg = CALL_EXPR_ARG (orig_method_call, 1);                        \
 240   offset_arg = fold_convert (java_type_for_size (POINTER_SIZE, 0),      \
 241                              CALL_EXPR_ARG (orig_method_call, 2));      \
 242   value_arg = CALL_EXPR_ARG (orig_method_call, 3);                      \
 243   value_type = TREE_TYPE (value_arg);                                   \
 244 }                                                                       \
 245 while (0)
 246
 247 #define UNMARSHAL5(METHOD_CALL)                                 \
 248 tree value_type, this_arg, obj_arg, offset_arg, expected_arg, value_arg; \
 249 do                                                                      \
 250 {                                                                       \
 251   tree orig_method_call = METHOD_CALL;                                  \
 252   this_arg = CALL_EXPR_ARG (orig_method_call, 0);                       \
 253   obj_arg = CALL_EXPR_ARG (orig_method_call, 1);                        \
 254   offset_arg = fold_convert (java_type_for_size (POINTER_SIZE, 0),      \
 255                              CALL_EXPR_ARG (orig_method_call, 2));      \
 256   expected_arg = CALL_EXPR_ARG (orig_method_call, 3);                   \
 257   value_arg = CALL_EXPR_ARG (orig_method_call, 4);                      \
 258   value_type = TREE_TYPE (value_arg);                                   \
 259 }                                                                       \
 260 while (0)
 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 (POINTER_PLUS_EXPR,
 269                       ptr_type,
 270                       fold_convert (ptr_type, addr),
 271                       fold_convert (sizetype, offset));
 272 }
 273
 274 /* Make sure that this-arg is non-NULL.  This is a security check.  */
 275
 276 static tree
 277 build_check_this (tree stmt, tree this_arg)
 278 {
 279   return build2 (COMPOUND_EXPR, TREE_TYPE (stmt),
 280                  java_check_reference (this_arg, 1), stmt);
 281 }
 282
 283 /* Now the builtins.  These correspond to the primitive functions in
 284    libjava/sun/misc/natUnsafe.cc.  */
 285
 286 static tree
 287 putObject_builtin (tree method_return_type ATTRIBUTE_UNUSED,
 288                    tree orig_call)
 289 {
 290   tree addr, stmt;
 291   UNMARSHAL4 (orig_call);
 292
 293   addr = build_addr_sum (value_type, obj_arg, offset_arg);
 294   stmt = fold_build2 (MODIFY_EXPR, value_type,
 295                       build_java_indirect_ref (value_type, addr,
 296                                                flag_check_references),
 297                       value_arg);
 298
 299   return build_check_this (stmt, this_arg);
 300 }
 301
 302 static tree
 303 compareAndSwapInt_builtin (tree method_return_type ATTRIBUTE_UNUSED,
 304                            tree orig_call)
 305 {
 306   enum machine_mode mode = TYPE_MODE (int_type_node);
 307   if (sync_compare_and_swap[mode] != CODE_FOR_nothing)
 308     {
 309       tree addr, stmt;
 310       UNMARSHAL5 (orig_call);
 311
 312       addr = build_addr_sum (int_type_node, obj_arg, offset_arg);
 313       stmt = build_call_expr (built_in_decls[BUILT_IN_BOOL_COMPARE_AND_SWAP_4],
 314                               3, addr, expected_arg, value_arg);
 315
 316       return build_check_this (stmt, this_arg);
 317     }
 318   return NULL_TREE;
 319 }
 320
 321 static tree
 322 compareAndSwapLong_builtin (tree method_return_type ATTRIBUTE_UNUSED,
 323                             tree orig_call)
 324 {
 325   enum machine_mode mode = TYPE_MODE (long_type_node);
 326   if (sync_compare_and_swap[mode] != CODE_FOR_nothing)
 327     {
 328       tree addr, stmt;
 329       UNMARSHAL5 (orig_call);
 330
 331       addr = build_addr_sum (long_type_node, obj_arg, offset_arg);
 332       stmt = build_call_expr (built_in_decls[BUILT_IN_BOOL_COMPARE_AND_SWAP_8],
 333                               3, addr, expected_arg, value_arg);
 334
 335       return build_check_this (stmt, this_arg);
 336     }
 337   return NULL_TREE;
 338 }
 339 static tree
 340 compareAndSwapObject_builtin (tree method_return_type ATTRIBUTE_UNUSED,
 341                               tree orig_call)
 342 {
 343   enum machine_mode mode = TYPE_MODE (ptr_type_node);
 344   if (sync_compare_and_swap[mode] != CODE_FOR_nothing)
 345   {
 346     tree addr, stmt;
 347     int builtin;
 348
 349     UNMARSHAL5 (orig_call);
 350     builtin = (POINTER_SIZE == 32
 351                ? BUILT_IN_BOOL_COMPARE_AND_SWAP_4
 352                : BUILT_IN_BOOL_COMPARE_AND_SWAP_8);
 353
 354     addr = build_addr_sum (value_type, obj_arg, offset_arg);
 355     stmt = build_call_expr (built_in_decls[builtin],
 356                             3, addr, expected_arg, value_arg);
 357
 358     return build_check_this (stmt, this_arg);
 359   }
 360   return NULL_TREE;
 361 }
 362
 363 static tree
 364 putVolatile_builtin (tree method_return_type ATTRIBUTE_UNUSED,
 365                      tree orig_call)
 366 {
 367   tree addr, stmt, modify_stmt;
 368   UNMARSHAL4 (orig_call);
 369
 370   addr = build_addr_sum (value_type, obj_arg, offset_arg);
 371   addr
 372     = fold_convert (build_pointer_type (build_type_variant (value_type, 0, 1)),
 373                     addr);
 374
 375   stmt = build_call_expr (built_in_decls[BUILT_IN_SYNCHRONIZE], 0);
 376   modify_stmt = fold_build2 (MODIFY_EXPR, value_type,
 377                              build_java_indirect_ref (value_type, addr,
 378                                                       flag_check_references),
 379                              value_arg);
 380   stmt = build2 (COMPOUND_EXPR, TREE_TYPE (modify_stmt),
 381                  stmt, modify_stmt);
 382
 383   return build_check_this (stmt, this_arg);
 384 }
 385
 386 static tree
 387 getVolatile_builtin (tree method_return_type ATTRIBUTE_UNUSED,
 388                      tree orig_call)
 389 {
 390   tree addr, stmt, modify_stmt, tmp;
 391   UNMARSHAL3 (orig_call);
 392
 393   addr = build_addr_sum (method_return_type, obj_arg, offset_arg);
 394   addr
 395     = fold_convert (build_pointer_type (build_type_variant
 396                                         (method_return_type, 0, 1)), addr);
 397
 398   stmt = build_call_expr (built_in_decls[BUILT_IN_SYNCHRONIZE], 0);
 399
 400   tmp = build_decl (VAR_DECL, NULL, method_return_type);
 401   DECL_IGNORED_P (tmp) = 1;
 402   DECL_ARTIFICIAL (tmp) = 1;
 403   pushdecl (tmp);
 404
 405   modify_stmt = fold_build2 (MODIFY_EXPR, method_return_type,
 406                              tmp,
 407                              build_java_indirect_ref (method_return_type, addr,
 408                                                       flag_check_references));
 409
 410   stmt = build2 (COMPOUND_EXPR, void_type_node, modify_stmt, stmt);
 411   stmt = build2 (COMPOUND_EXPR, method_return_type, stmt, tmp);
 412
 413   return stmt;
 414 }
 415
 416 static tree
 417 VMSupportsCS8_builtin (tree method_return_type,
 418                        tree orig_call ATTRIBUTE_UNUSED)
 419 {
 420   enum machine_mode mode = TYPE_MODE (long_type_node);
 421   gcc_assert (method_return_type == boolean_type_node);
 422   if (sync_compare_and_swap[mode] != CODE_FOR_nothing)
 423     return boolean_true_node;
 424   else
 425     return boolean_false_node;
 426 }
 427
 428 \f
 429
 430 #define BUILTIN_NOTHROW 1
 431 #define BUILTIN_CONST 2
 432 /* Define a single builtin.  */
 433 static void
 434 define_builtin (enum built_in_function val,
 435                 const char *name,
 436                 tree type,
 437                 const char *libname,
 438                 int flags)
 439 {
 440   tree decl;
 441
 442   decl = build_decl (FUNCTION_DECL, get_identifier (name), type);
 443   DECL_EXTERNAL (decl) = 1;
 444   TREE_PUBLIC (decl) = 1;
 445   SET_DECL_ASSEMBLER_NAME (decl, get_identifier (libname));
 446   pushdecl (decl);
 447   DECL_BUILT_IN_CLASS (decl) = BUILT_IN_NORMAL;
 448   DECL_FUNCTION_CODE (decl) = val;
 449   if (flags & BUILTIN_NOTHROW)
 450     TREE_NOTHROW (decl) = 1;
 451   if (flags & BUILTIN_CONST)
 452     TREE_READONLY (decl) = 1;
 453
 454   implicit_built_in_decls[val] = decl;
 455   built_in_decls[val] = decl;
 456 }
 457
 458 \f
 459
 460 /* Initialize the builtins.  */
 461 void
 462 initialize_builtins (void)
 463 {
 464   tree double_ftype_double, double_ftype_double_double;
 465   tree float_ftype_float, float_ftype_float_float;
 466   tree boolean_ftype_boolean_boolean;
 467   tree t;
 468   int i;
 469
 470   for (i = 0; java_builtins[i].builtin_code != END_BUILTINS; ++i)
 471     {
 472       tree klass_id = get_identifier (java_builtins[i].class_name.s);
 473       tree m = get_identifier (java_builtins[i].method_name.s);
 474
 475       java_builtins[i].class_name.t = klass_id;
 476       java_builtins[i].method_name.t = m;
 477     }
 478
 479   void_list_node = end_params_node;
 480
 481   t = tree_cons (NULL_TREE, float_type_node, end_params_node);
 482   float_ftype_float = build_function_type (float_type_node, t);
 483   t = tree_cons (NULL_TREE, float_type_node, t);
 484   float_ftype_float_float = build_function_type (float_type_node, t);
 485
 486   t = tree_cons (NULL_TREE, double_type_node, end_params_node);
 487   double_ftype_double = build_function_type (double_type_node, t);
 488   t = tree_cons (NULL_TREE, double_type_node, t);
 489   double_ftype_double_double = build_function_type (double_type_node, t);
 490
 491   define_builtin (BUILT_IN_FMOD, "__builtin_fmod",
 492                   double_ftype_double_double, "fmod", BUILTIN_CONST);
 493   define_builtin (BUILT_IN_FMODF, "__builtin_fmodf",
 494                   float_ftype_float_float, "fmodf", BUILTIN_CONST);
 495
 496   define_builtin (BUILT_IN_ACOS, "__builtin_acos",
 497                   double_ftype_double, "_ZN4java4lang4Math4acosEJdd",
 498                   BUILTIN_CONST);
 499   define_builtin (BUILT_IN_ASIN, "__builtin_asin",
 500                   double_ftype_double, "_ZN4java4lang4Math4asinEJdd",
 501                   BUILTIN_CONST);
 502   define_builtin (BUILT_IN_ATAN, "__builtin_atan",
 503                   double_ftype_double, "_ZN4java4lang4Math4atanEJdd",
 504                   BUILTIN_CONST);
 505   define_builtin (BUILT_IN_ATAN2, "__builtin_atan2",
 506                   double_ftype_double_double, "_ZN4java4lang4Math5atan2EJddd",
 507                   BUILTIN_CONST);
 508   define_builtin (BUILT_IN_CEIL, "__builtin_ceil",
 509                   double_ftype_double, "_ZN4java4lang4Math4ceilEJdd",
 510                   BUILTIN_CONST);
 511   define_builtin (BUILT_IN_COS, "__builtin_cos",
 512                   double_ftype_double, "_ZN4java4lang4Math3cosEJdd",
 513                   BUILTIN_CONST);
 514   define_builtin (BUILT_IN_EXP, "__builtin_exp",
 515                   double_ftype_double, "_ZN4java4lang4Math3expEJdd",
 516                   BUILTIN_CONST);
 517   define_builtin (BUILT_IN_FLOOR, "__builtin_floor",
 518                   double_ftype_double, "_ZN4java4lang4Math5floorEJdd",
 519                   BUILTIN_CONST);
 520   define_builtin (BUILT_IN_LOG, "__builtin_log",
 521                   double_ftype_double, "_ZN4java4lang4Math3logEJdd",
 522                   BUILTIN_CONST);
 523   define_builtin (BUILT_IN_POW, "__builtin_pow",
 524                   double_ftype_double_double, "_ZN4java4lang4Math3powEJddd",
 525                   BUILTIN_CONST);
 526   define_builtin (BUILT_IN_SIN, "__builtin_sin",
 527                   double_ftype_double, "_ZN4java4lang4Math3sinEJdd",
 528                   BUILTIN_CONST);
 529   define_builtin (BUILT_IN_SQRT, "__builtin_sqrt",
 530                   double_ftype_double, "_ZN4java4lang4Math4sqrtEJdd",
 531                   BUILTIN_CONST);
 532   define_builtin (BUILT_IN_TAN, "__builtin_tan",
 533                   double_ftype_double, "_ZN4java4lang4Math3tanEJdd",
 534                   BUILTIN_CONST);
 535
 536   t = tree_cons (NULL_TREE, boolean_type_node, end_params_node);
 537   t = tree_cons (NULL_TREE, boolean_type_node, t);
 538   boolean_ftype_boolean_boolean = build_function_type (boolean_type_node, t);
 539   define_builtin (BUILT_IN_EXPECT, "__builtin_expect",
 540                   boolean_ftype_boolean_boolean,
 541                   "__builtin_expect",
 542                   BUILTIN_CONST | BUILTIN_NOTHROW);
 543   define_builtin (BUILT_IN_BOOL_COMPARE_AND_SWAP_4,
 544                   "__sync_bool_compare_and_swap_4",
 545                   build_function_type_list (boolean_type_node,
 546                                             int_type_node,
 547                                             build_pointer_type (int_type_node),
 548                                             int_type_node, NULL_TREE),
 549                   "__sync_bool_compare_and_swap_4", 0);
 550   define_builtin (BUILT_IN_BOOL_COMPARE_AND_SWAP_8,
 551                   "__sync_bool_compare_and_swap_8",
 552                   build_function_type_list (boolean_type_node,
 553                                             long_type_node,
 554                                             build_pointer_type (long_type_node),
 555                                             int_type_node, NULL_TREE),
 556                   "__sync_bool_compare_and_swap_8", 0);
 557   define_builtin (BUILT_IN_SYNCHRONIZE, "__sync_synchronize",
 558                   build_function_type (void_type_node, void_list_node),
 559                   "__sync_synchronize", BUILTIN_NOTHROW);
 560
 561   define_builtin (BUILT_IN_RETURN_ADDRESS, "__builtin_return_address",
 562                   build_function_type_list (ptr_type_node, int_type_node, NULL_TREE),
 563                   "__builtin_return_address", BUILTIN_NOTHROW);
 564
 565   build_common_builtin_nodes ();
 566 }
 567
 568 /* If the call matches a builtin, return the
 569    appropriate builtin expression instead.  */
 570 tree
 571 check_for_builtin (tree method, tree call)
 572 {
 573   if (optimize && TREE_CODE (call) == CALL_EXPR)
 574     {
 575       int i;
 576       tree method_class = DECL_NAME (TYPE_NAME (DECL_CONTEXT (method)));
 577       tree method_name = DECL_NAME (method);
 578       tree method_return_type = TREE_TYPE (TREE_TYPE (method));
 579
 580       for (i = 0; java_builtins[i].builtin_code != END_BUILTINS; ++i)
 581         {
 582           if (method_class == java_builtins[i].class_name.t
 583               && method_name == java_builtins[i].method_name.t)
 584             {
 585               tree fn;
 586
 587               if (java_builtins[i].creator != NULL)
 588                 {
 589                   tree result
 590                     = (*java_builtins[i].creator) (method_return_type, call);
 591                   return result == NULL_TREE ? call : result;
 592                 }
 593
 594               /* Builtin functions emit a direct call which is incompatible
 595                  with the BC-ABI.  */
 596               if (flag_indirect_dispatch)
 597                 return call;
 598               fn = built_in_decls[java_builtins[i].builtin_code];
 599               if (fn == NULL_TREE)
 600                 return call;
 601               return java_build_function_call_expr (fn, call);
 602             }
 603         }
 604     }
 605   return call;
 606 }
 607
 608 #include "gt-java-builtins.h"