gcc/java/builtins.c

   1 /* Built-in and inline functions for gcj
   2    Copyright (C) 2001-2014 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 3, or (at your option)
   9 any later version.
  10
  11 GCC is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 .
  17
  18 .
  19
  20 Java and all Java-based marks are trademarks or registered trademarks
  21 of Sun Microsystems, Inc. in the United States and other countries.
  22 The Free Software Foundation is independent of Sun Microsystems, Inc.  */
  23
  24 /* Written by Tom Tromey <tromey@redhat.com>.  */
  25
  26 /* FIXME: Still need to include rtl.h here (see below).  */
  27 #undef IN_GCC_FRONTEND
  28
  29 #include "config.h"
  30 #include "system.h"
  31 #include "coretypes.h"
  32 #include "tm.h"
  33 #include "tree.h"
  34 #include "stor-layout.h"
  35 #include "stringpool.h"
  36 #include "ggc.h"
  37 #include "flags.h"
  38 #include "langhooks.h"
  39 #include "java-tree.h"
  40
  41 /* FIXME: All these headers are necessary for sync_compare_and_swap.
  42    Front ends should never have to look at that.  */
  43 #include "rtl.h"
  44 #include "insn-codes.h"
  45 #include "expr.h"
  46 #include "optabs.h"
  47
  48 static tree max_builtin (tree, tree);
  49 static tree min_builtin (tree, tree);
  50 static tree abs_builtin (tree, tree);
  51 static tree convert_real (tree, tree);
  52
  53 static tree java_build_function_call_expr (tree, tree);
  54
  55 static tree putObject_builtin (tree, tree);
  56 static tree compareAndSwapInt_builtin (tree, tree);
  57 static tree compareAndSwapLong_builtin (tree, tree);
  58 static tree compareAndSwapObject_builtin (tree, tree);
  59 static tree putVolatile_builtin (tree, tree);
  60 static tree getVolatile_builtin (tree, tree);
  61 static tree VMSupportsCS8_builtin (tree, tree);
  62 \f
  63
  64 /* Functions of this type are used to inline a given call.  Such a
  65    function should either return an expression, if the call is to be
  66    inlined, or NULL_TREE if a real call should be emitted.  Arguments
  67    are method return type and the original CALL_EXPR containing the
  68    arguments to the call.  */
  69 typedef tree builtin_creator_function (tree, tree);
  70
  71 /* Hold a char*, before initialization, or a tree, after
  72    initialization.  */
  73 union GTY(()) string_or_tree {
  74   const char * GTY ((tag ("0"))) s;
  75   tree GTY ((tag ("1"))) t;
  76 };
  77
  78 /* Used to hold a single builtin record.  */
  79 struct GTY(()) builtin_record {
  80   union string_or_tree GTY ((desc ("1"))) class_name;
  81   union string_or_tree GTY ((desc ("1"))) method_name;
  82   builtin_creator_function * GTY((skip)) creator;
  83   enum built_in_function builtin_code;
  84 };
  85
  86 static GTY(()) struct builtin_record java_builtins[] =
  87 {
  88   { { "java.lang.Math" }, { "min" }, min_builtin, (enum built_in_function) 0 },
  89   { { "java.lang.Math" }, { "max" }, max_builtin, (enum built_in_function) 0 },
  90   { { "java.lang.Math" }, { "abs" }, abs_builtin, (enum built_in_function) 0 },
  91   { { "java.lang.Math" }, { "acos" }, NULL, BUILT_IN_ACOS },
  92   { { "java.lang.Math" }, { "asin" }, NULL, BUILT_IN_ASIN },
  93   { { "java.lang.Math" }, { "atan" }, NULL, BUILT_IN_ATAN },
  94   { { "java.lang.Math" }, { "atan2" }, NULL, BUILT_IN_ATAN2 },
  95   { { "java.lang.Math" }, { "ceil" }, NULL, BUILT_IN_CEIL },
  96   { { "java.lang.Math" }, { "cos" }, NULL, BUILT_IN_COS },
  97   { { "java.lang.Math" }, { "exp" }, NULL, BUILT_IN_EXP },
  98   { { "java.lang.Math" }, { "floor" }, NULL, BUILT_IN_FLOOR },
  99   { { "java.lang.Math" }, { "log" }, NULL, BUILT_IN_LOG },
 100   { { "java.lang.Math" }, { "pow" }, NULL, BUILT_IN_POW },
 101   { { "java.lang.Math" }, { "sin" }, NULL, BUILT_IN_SIN },
 102   { { "java.lang.Math" }, { "sqrt" }, NULL, BUILT_IN_SQRT },
 103   { { "java.lang.Math" }, { "tan" }, NULL, BUILT_IN_TAN },
 104   { { "java.lang.Float" }, { "intBitsToFloat" }, convert_real,
 105     (enum built_in_function) 0 },
 106   { { "java.lang.Double" }, { "longBitsToDouble" }, convert_real,
 107     (enum built_in_function) 0 },
 108   { { "java.lang.Float" }, { "floatToRawIntBits" }, convert_real,
 109     (enum built_in_function) 0 },
 110   { { "java.lang.Double" }, { "doubleToRawLongBits" }, convert_real,
 111     (enum built_in_function) 0 },
 112   { { "sun.misc.Unsafe" }, { "putInt" }, putObject_builtin,
 113     (enum built_in_function) 0},
 114   { { "sun.misc.Unsafe" }, { "putLong" }, putObject_builtin,
 115     (enum built_in_function) 0},
 116   { { "sun.misc.Unsafe" }, { "putObject" }, putObject_builtin,
 117   (enum built_in_function) 0},
 118   { { "sun.misc.Unsafe" }, { "compareAndSwapInt" },
 119     compareAndSwapInt_builtin, (enum built_in_function) 0},
 120   { { "sun.misc.Unsafe" }, { "compareAndSwapLong" },
 121     compareAndSwapLong_builtin, (enum built_in_function) 0},
 122   { { "sun.misc.Unsafe" }, { "compareAndSwapObject" },
 123     compareAndSwapObject_builtin, (enum built_in_function) 0},
 124   { { "sun.misc.Unsafe" }, { "putOrderedInt" }, putVolatile_builtin,
 125     (enum built_in_function) 0},
 126   { { "sun.misc.Unsafe" }, { "putOrderedLong" }, putVolatile_builtin,
 127     (enum built_in_function) 0},
 128   { { "sun.misc.Unsafe" }, { "putOrderedObject" }, putVolatile_builtin,
 129     (enum built_in_function) 0},
 130   { { "sun.misc.Unsafe" }, { "putIntVolatile" }, putVolatile_builtin,
 131     (enum built_in_function) 0},
 132   { { "sun.misc.Unsafe" }, { "putLongVolatile" }, putVolatile_builtin,
 133     (enum built_in_function) 0},
 134   { { "sun.misc.Unsafe" }, { "putObjectVolatile" }, putVolatile_builtin,
 135     (enum built_in_function) 0},
 136   { { "sun.misc.Unsafe" }, { "getObjectVolatile" }, getVolatile_builtin,
 137     (enum built_in_function) 0},
 138   { { "sun.misc.Unsafe" }, { "getIntVolatile" }, getVolatile_builtin,
 139     (enum built_in_function) 0},
 140   { { "sun.misc.Unsafe" }, { "getLongVolatile" }, getVolatile_builtin, (enum built_in_function) 0},
 141   { { "sun.misc.Unsafe" }, { "getLong" }, getVolatile_builtin,
 142     (enum built_in_function) 0},
 143   { { "java.util.concurrent.atomic.AtomicLong" }, { "VMSupportsCS8" },
 144     VMSupportsCS8_builtin, (enum built_in_function) 0},
 145   { { NULL }, { NULL }, NULL, END_BUILTINS }
 146 };
 147
 148 \f
 149 /* Internal functions which implement various builtin conversions.  */
 150
 151 static tree
 152 max_builtin (tree method_return_type, tree orig_call)
 153 {
 154   /* MAX_EXPR does not handle -0.0 in the Java style.  */
 155   if (TREE_CODE (method_return_type) == REAL_TYPE)
 156     return NULL_TREE;
 157   return fold_build2 (MAX_EXPR, method_return_type,
 158                       CALL_EXPR_ARG (orig_call, 0),
 159                       CALL_EXPR_ARG (orig_call, 1));
 160 }
 161
 162 static tree
 163 min_builtin (tree method_return_type, tree orig_call)
 164 {
 165   /* MIN_EXPR does not handle -0.0 in the Java style.  */
 166   if (TREE_CODE (method_return_type) == REAL_TYPE)
 167     return NULL_TREE;
 168   return fold_build2 (MIN_EXPR, method_return_type,
 169                       CALL_EXPR_ARG (orig_call, 0),
 170                       CALL_EXPR_ARG (orig_call, 1));
 171 }
 172
 173 static tree
 174 abs_builtin (tree method_return_type, tree orig_call)
 175 {
 176   return fold_build1 (ABS_EXPR, method_return_type,
 177                       CALL_EXPR_ARG (orig_call, 0));
 178 }
 179
 180 /* Construct a new call to FN using the arguments from ORIG_CALL.  */
 181
 182 static tree
 183 java_build_function_call_expr (tree fn, tree orig_call)
 184 {
 185   int nargs = call_expr_nargs (orig_call);
 186   switch (nargs)
 187     {
 188       /* Although we could handle the 0-3 argument cases using the general
 189          logic in the default case, splitting them out permits folding to
 190          be performed without constructing a temporary CALL_EXPR.  */
 191     case 0:
 192       return build_call_expr (fn, 0);
 193     case 1:
 194       return build_call_expr (fn, 1, CALL_EXPR_ARG (orig_call, 0));
 195     case 2:
 196       return build_call_expr (fn, 2,
 197                               CALL_EXPR_ARG (orig_call, 0),
 198                               CALL_EXPR_ARG (orig_call, 1));
 199     case 3:
 200       return build_call_expr (fn, 3,
 201                               CALL_EXPR_ARG (orig_call, 0),
 202                               CALL_EXPR_ARG (orig_call, 1),
 203                               CALL_EXPR_ARG (orig_call, 2));
 204     default:
 205       {
 206         tree fntype = TREE_TYPE (fn);
 207         fn = build1 (ADDR_EXPR, build_pointer_type (fntype), fn);
 208         return fold (build_call_array (TREE_TYPE (fntype),
 209                                        fn, nargs, CALL_EXPR_ARGP (orig_call)));
 210       }
 211     }
 212 }
 213
 214 static tree
 215 convert_real (tree method_return_type, tree orig_call)
 216 {
 217   return build1 (VIEW_CONVERT_EXPR, method_return_type,
 218                  CALL_EXPR_ARG (orig_call, 0));
 219 }
 220
 221 \f
 222
 223 /* Provide builtin support for atomic operations.  These are
 224    documented at length in libjava/sun/misc/Unsafe.java.  */
 225
 226 /* FIXME.  There are still a few things wrong with this logic.  In
 227    particular, atomic writes of multi-word integers are not truly
 228    atomic: this requires more work.
 229
 230    In general, double-word compare-and-swap cannot portably be
 231    implemented, so we need some kind of fallback for 32-bit machines.
 232
 233 */
 234
 235
 236 /* Macros to unmarshal arguments from a CALL_EXPR into a few
 237    variables.  We also convert the offset arg from a long to an
 238    integer that is the same size as a pointer.  */
 239
 240 #define UNMARSHAL3(METHOD_CALL)                                 \
 241 tree this_arg, obj_arg, offset_arg;                                     \
 242 do                                                                      \
 243 {                                                                       \
 244   tree orig_method_call = METHOD_CALL;                                  \
 245   this_arg = CALL_EXPR_ARG (orig_method_call, 0);                       \
 246   obj_arg = CALL_EXPR_ARG (orig_method_call, 1);                        \
 247   offset_arg = fold_convert (java_type_for_size (POINTER_SIZE, 0),      \
 248                              CALL_EXPR_ARG (orig_method_call, 2));      \
 249 }                                                                       \
 250 while (0)
 251
 252 #define UNMARSHAL4(METHOD_CALL)                                 \
 253 tree value_type, this_arg, obj_arg, offset_arg, value_arg;              \
 254 do                                                                      \
 255 {                                                                       \
 256   tree orig_method_call = METHOD_CALL;                                  \
 257   this_arg = CALL_EXPR_ARG (orig_method_call, 0);                       \
 258   obj_arg = CALL_EXPR_ARG (orig_method_call, 1);                        \
 259   offset_arg = fold_convert (java_type_for_size (POINTER_SIZE, 0),      \
 260                              CALL_EXPR_ARG (orig_method_call, 2));      \
 261   value_arg = CALL_EXPR_ARG (orig_method_call, 3);                      \
 262   value_type = TREE_TYPE (value_arg);                                   \
 263 }                                                                       \
 264 while (0)
 265
 266 #define UNMARSHAL5(METHOD_CALL)                                 \
 267 tree value_type, this_arg, obj_arg, offset_arg, expected_arg, value_arg; \
 268 do                                                                      \
 269 {                                                                       \
 270   tree orig_method_call = METHOD_CALL;                                  \
 271   this_arg = CALL_EXPR_ARG (orig_method_call, 0);                       \
 272   obj_arg = CALL_EXPR_ARG (orig_method_call, 1);                        \
 273   offset_arg = fold_convert (java_type_for_size (POINTER_SIZE, 0),      \
 274                              CALL_EXPR_ARG (orig_method_call, 2));      \
 275   expected_arg = CALL_EXPR_ARG (orig_method_call, 3);                   \
 276   value_arg = CALL_EXPR_ARG (orig_method_call, 4);                      \
 277   value_type = TREE_TYPE (value_arg);                                   \
 278 }                                                                       \
 279 while (0)
 280
 281 /* Add an address to an offset, forming a sum.  */
 282
 283 static tree
 284 build_addr_sum (tree type, tree addr, tree offset)
 285 {
 286   tree ptr_type = build_pointer_type (type);
 287   return fold_build_pointer_plus (fold_convert (ptr_type, addr), offset);
 288 }
 289
 290 /* Make sure that this-arg is non-NULL.  This is a security check.  */
 291
 292 static tree
 293 build_check_this (tree stmt, tree this_arg)
 294 {
 295   return build2 (COMPOUND_EXPR, TREE_TYPE (stmt),
 296                  java_check_reference (this_arg, 1), stmt);
 297 }
 298
 299 /* Now the builtins.  These correspond to the primitive functions in
 300    libjava/sun/misc/natUnsafe.cc.  */
 301
 302 static tree
 303 putObject_builtin (tree method_return_type ATTRIBUTE_UNUSED,
 304                    tree orig_call)
 305 {
 306   tree addr, stmt;
 307   UNMARSHAL4 (orig_call);
 308
 309   addr = build_addr_sum (value_type, obj_arg, offset_arg);
 310   stmt = fold_build2 (MODIFY_EXPR, value_type,
 311                       build_java_indirect_ref (value_type, addr,
 312                                                flag_check_references),
 313                       value_arg);
 314
 315   return build_check_this (stmt, this_arg);
 316 }
 317
 318 static tree
 319 compareAndSwapInt_builtin (tree method_return_type ATTRIBUTE_UNUSED,
 320                            tree orig_call)
 321 {
 322   enum machine_mode mode = TYPE_MODE (int_type_node);
 323   if (can_compare_and_swap_p (mode, flag_use_atomic_builtins))
 324     {
 325       tree addr, stmt;
 326       enum built_in_function fncode = BUILT_IN_SYNC_BOOL_COMPARE_AND_SWAP_4;
 327       UNMARSHAL5 (orig_call);
 328       (void) value_type; /* Avoid set but not used warning.  */
 329
 330       addr = build_addr_sum (int_type_node, obj_arg, offset_arg);
 331       stmt = build_call_expr (builtin_decl_explicit (fncode),
 332                               3, addr, expected_arg, value_arg);
 333
 334       return build_check_this (stmt, this_arg);
 335     }
 336   return NULL_TREE;
 337 }
 338
 339 static tree
 340 compareAndSwapLong_builtin (tree method_return_type ATTRIBUTE_UNUSED,
 341                             tree orig_call)
 342 {
 343   enum machine_mode mode = TYPE_MODE (long_type_node);
 344   /* We don't trust flag_use_atomic_builtins for multi-word compareAndSwap.
 345      Some machines such as ARM have atomic libfuncs but not the multi-word
 346      versions.  */
 347   if (can_compare_and_swap_p (mode,
 348                               (flag_use_atomic_builtins
 349                                && GET_MODE_SIZE (mode) <= UNITS_PER_WORD)))
 350     {
 351       tree addr, stmt;
 352       enum built_in_function fncode = BUILT_IN_SYNC_BOOL_COMPARE_AND_SWAP_8;
 353       UNMARSHAL5 (orig_call);
 354       (void) value_type; /* Avoid set but not used warning.  */
 355
 356       addr = build_addr_sum (long_type_node, obj_arg, offset_arg);
 357       stmt = build_call_expr (builtin_decl_explicit (fncode),
 358                               3, addr, expected_arg, value_arg);
 359
 360       return build_check_this (stmt, this_arg);
 361     }
 362   return NULL_TREE;
 363 }
 364 static tree
 365 compareAndSwapObject_builtin (tree method_return_type ATTRIBUTE_UNUSED,
 366                               tree orig_call)
 367 {
 368   enum machine_mode mode = TYPE_MODE (ptr_type_node);
 369   if (can_compare_and_swap_p (mode, flag_use_atomic_builtins))
 370   {
 371     tree addr, stmt;
 372     enum built_in_function builtin;
 373
 374     UNMARSHAL5 (orig_call);
 375     builtin = (POINTER_SIZE == 32
 376                ? BUILT_IN_SYNC_BOOL_COMPARE_AND_SWAP_4
 377                : BUILT_IN_SYNC_BOOL_COMPARE_AND_SWAP_8);
 378
 379     addr = build_addr_sum (value_type, obj_arg, offset_arg);
 380     stmt = build_call_expr (builtin_decl_explicit (builtin),
 381                             3, addr, expected_arg, value_arg);
 382
 383     return build_check_this (stmt, this_arg);
 384   }
 385   return NULL_TREE;
 386 }
 387
 388 static tree
 389 putVolatile_builtin (tree method_return_type ATTRIBUTE_UNUSED,
 390                      tree orig_call)
 391 {
 392   tree addr, stmt, modify_stmt;
 393   UNMARSHAL4 (orig_call);
 394
 395   addr = build_addr_sum (value_type, obj_arg, offset_arg);
 396   addr
 397     = fold_convert (build_pointer_type (build_qualified_type
 398                                         (value_type, TYPE_QUAL_VOLATILE)),
 399                     addr);
 400
 401   stmt = build_call_expr (builtin_decl_explicit (BUILT_IN_SYNC_SYNCHRONIZE), 0);
 402   modify_stmt = fold_build2 (MODIFY_EXPR, value_type,
 403                              build_java_indirect_ref (value_type, addr,
 404                                                       flag_check_references),
 405                              value_arg);
 406   stmt = build2 (COMPOUND_EXPR, TREE_TYPE (modify_stmt),
 407                  stmt, modify_stmt);
 408
 409   return build_check_this (stmt, this_arg);
 410 }
 411
 412 static tree
 413 getVolatile_builtin (tree method_return_type ATTRIBUTE_UNUSED,
 414                      tree orig_call)
 415 {
 416   tree addr, stmt, modify_stmt, tmp;
 417   UNMARSHAL3 (orig_call);
 418   (void) this_arg; /* Avoid set but not used warning.  */
 419
 420   addr = build_addr_sum (method_return_type, obj_arg, offset_arg);
 421   addr
 422     = fold_convert (build_pointer_type (build_qualified_type
 423                                         (method_return_type,
 424                                          TYPE_QUAL_VOLATILE)), addr);
 425
 426   stmt = build_call_expr (builtin_decl_explicit (BUILT_IN_SYNC_SYNCHRONIZE), 0);
 427   tmp = build_decl (BUILTINS_LOCATION, VAR_DECL, NULL, method_return_type);
 428   DECL_IGNORED_P (tmp) = 1;
 429   DECL_ARTIFICIAL (tmp) = 1;
 430   pushdecl (tmp);
 431
 432   modify_stmt = fold_build2 (MODIFY_EXPR, method_return_type,
 433                              tmp,
 434                              build_java_indirect_ref (method_return_type, addr,
 435                                                       flag_check_references));
 436
 437   stmt = build2 (COMPOUND_EXPR, void_type_node, modify_stmt, stmt);
 438   stmt = build2 (COMPOUND_EXPR, method_return_type, stmt, tmp);
 439
 440   return stmt;
 441 }
 442
 443 static tree
 444 VMSupportsCS8_builtin (tree method_return_type,
 445                        tree orig_call ATTRIBUTE_UNUSED)
 446 {
 447   enum machine_mode mode = TYPE_MODE (long_type_node);
 448   gcc_assert (method_return_type == boolean_type_node);
 449   if (can_compare_and_swap_p (mode, false))
 450     return boolean_true_node;
 451   else
 452     return boolean_false_node;
 453 }
 454
 455 \f
 456
 457 /* Define a single builtin.  */
 458 static void
 459 define_builtin (enum built_in_function val,
 460                 const char *name,
 461                 tree type,
 462                 const char *libname,
 463                 int flags)
 464 {
 465   tree decl;
 466
 467   decl = build_decl (BUILTINS_LOCATION,
 468                      FUNCTION_DECL, get_identifier (name), type);
 469   DECL_EXTERNAL (decl) = 1;
 470   TREE_PUBLIC (decl) = 1;
 471   SET_DECL_ASSEMBLER_NAME (decl, get_identifier (libname));
 472   pushdecl (decl);
 473   DECL_BUILT_IN_CLASS (decl) = BUILT_IN_NORMAL;
 474   DECL_FUNCTION_CODE (decl) = val;
 475   set_call_expr_flags (decl, flags);
 476
 477   set_builtin_decl (val, decl, true);
 478 }
 479
 480 \f
 481
 482 /* Initialize the builtins.  */
 483 void
 484 initialize_builtins (void)
 485 {
 486   tree double_ftype_double, double_ftype_double_double;
 487   tree float_ftype_float_float;
 488   tree boolean_ftype_boolean_boolean;
 489   int i;
 490
 491   for (i = 0; java_builtins[i].builtin_code != END_BUILTINS; ++i)
 492     {
 493       tree klass_id = get_identifier (java_builtins[i].class_name.s);
 494       tree m = get_identifier (java_builtins[i].method_name.s);
 495
 496       java_builtins[i].class_name.t = klass_id;
 497       java_builtins[i].method_name.t = m;
 498     }
 499
 500   void_list_node = end_params_node;
 501
 502   float_ftype_float_float
 503     = build_function_type_list (float_type_node,
 504                                 float_type_node, float_type_node, NULL_TREE);
 505
 506   double_ftype_double
 507     = build_function_type_list (double_type_node, double_type_node, NULL_TREE);
 508   double_ftype_double_double
 509     = build_function_type_list (double_type_node,
 510                                 double_type_node, double_type_node, NULL_TREE);
 511
 512   define_builtin (BUILT_IN_FMOD, "__builtin_fmod",
 513                   double_ftype_double_double, "fmod", ECF_CONST);
 514   define_builtin (BUILT_IN_FMODF, "__builtin_fmodf",
 515                   float_ftype_float_float, "fmodf", ECF_CONST);
 516
 517   define_builtin (BUILT_IN_ACOS, "__builtin_acos",
 518                   double_ftype_double, "_ZN4java4lang4Math4acosEJdd",
 519                   ECF_CONST);
 520   define_builtin (BUILT_IN_ASIN, "__builtin_asin",
 521                   double_ftype_double, "_ZN4java4lang4Math4asinEJdd",
 522                   ECF_CONST);
 523   define_builtin (BUILT_IN_ATAN, "__builtin_atan",
 524                   double_ftype_double, "_ZN4java4lang4Math4atanEJdd",
 525                   ECF_CONST);
 526   define_builtin (BUILT_IN_ATAN2, "__builtin_atan2",
 527                   double_ftype_double_double, "_ZN4java4lang4Math5atan2EJddd",
 528                   ECF_CONST);
 529   define_builtin (BUILT_IN_CEIL, "__builtin_ceil",
 530                   double_ftype_double, "_ZN4java4lang4Math4ceilEJdd",
 531                   ECF_CONST);
 532   define_builtin (BUILT_IN_COS, "__builtin_cos",
 533                   double_ftype_double, "_ZN4java4lang4Math3cosEJdd",
 534                   ECF_CONST);
 535   define_builtin (BUILT_IN_EXP, "__builtin_exp",
 536                   double_ftype_double, "_ZN4java4lang4Math3expEJdd",
 537                   ECF_CONST);
 538   define_builtin (BUILT_IN_FLOOR, "__builtin_floor",
 539                   double_ftype_double, "_ZN4java4lang4Math5floorEJdd",
 540                   ECF_CONST);
 541   define_builtin (BUILT_IN_LOG, "__builtin_log",
 542                   double_ftype_double, "_ZN4java4lang4Math3logEJdd",
 543                   ECF_CONST);
 544   define_builtin (BUILT_IN_POW, "__builtin_pow",
 545                   double_ftype_double_double, "_ZN4java4lang4Math3powEJddd",
 546                   ECF_CONST);
 547   define_builtin (BUILT_IN_SIN, "__builtin_sin",
 548                   double_ftype_double, "_ZN4java4lang4Math3sinEJdd",
 549                   ECF_CONST);
 550   define_builtin (BUILT_IN_SQRT, "__builtin_sqrt",
 551                   double_ftype_double, "_ZN4java4lang4Math4sqrtEJdd",
 552                   ECF_CONST);
 553   define_builtin (BUILT_IN_TAN, "__builtin_tan",
 554                   double_ftype_double, "_ZN4java4lang4Math3tanEJdd",
 555                   ECF_CONST);
 556
 557   boolean_ftype_boolean_boolean
 558     = build_function_type_list (boolean_type_node,
 559                                 boolean_type_node, boolean_type_node,
 560                                 NULL_TREE);
 561   define_builtin (BUILT_IN_EXPECT, "__builtin_expect",
 562                   boolean_ftype_boolean_boolean,
 563                   "__builtin_expect",
 564                   ECF_CONST | ECF_NOTHROW);
 565   define_builtin (BUILT_IN_SYNC_BOOL_COMPARE_AND_SWAP_4,
 566                   "__sync_bool_compare_and_swap_4",
 567                   build_function_type_list (boolean_type_node,
 568                                             int_type_node,
 569                                             build_pointer_type (int_type_node),
 570                                             int_type_node, NULL_TREE),
 571                   "__sync_bool_compare_and_swap_4", ECF_NOTHROW | ECF_LEAF);
 572   define_builtin (BUILT_IN_SYNC_BOOL_COMPARE_AND_SWAP_8,
 573                   "__sync_bool_compare_and_swap_8",
 574                   build_function_type_list (boolean_type_node,
 575                                             long_type_node,
 576                                             build_pointer_type (long_type_node),
 577                                             int_type_node, NULL_TREE),
 578                   "__sync_bool_compare_and_swap_8", ECF_NOTHROW | ECF_LEAF);
 579   define_builtin (BUILT_IN_SYNC_SYNCHRONIZE, "__sync_synchronize",
 580                   build_function_type_list (void_type_node, NULL_TREE),
 581                   "__sync_synchronize", ECF_NOTHROW | ECF_LEAF);
 582
 583   define_builtin (BUILT_IN_RETURN_ADDRESS, "__builtin_return_address",
 584                   build_function_type_list (ptr_type_node, int_type_node, NULL_TREE),
 585                   "__builtin_return_address", ECF_NOTHROW | ECF_LEAF);
 586   define_builtin (BUILT_IN_TRAP, "__builtin_trap",
 587                   build_function_type_list (void_type_node, NULL_TREE),
 588                   "__builtin_trap", ECF_NOTHROW | ECF_LEAF | ECF_NORETURN);
 589   build_common_builtin_nodes ();
 590 }
 591
 592 /* If the call matches a builtin, return the
 593    appropriate builtin expression instead.  */
 594 tree
 595 check_for_builtin (tree method, tree call)
 596 {
 597   if (optimize && TREE_CODE (call) == CALL_EXPR)
 598     {
 599       int i;
 600       tree method_class = DECL_NAME (TYPE_NAME (DECL_CONTEXT (method)));
 601       tree method_name = DECL_NAME (method);
 602       tree method_return_type = TREE_TYPE (TREE_TYPE (method));
 603
 604       for (i = 0; java_builtins[i].builtin_code != END_BUILTINS; ++i)
 605         {
 606           if (method_class == java_builtins[i].class_name.t
 607               && method_name == java_builtins[i].method_name.t)
 608             {
 609               tree fn;
 610
 611               if (java_builtins[i].creator != NULL)
 612                 {
 613                   tree result
 614                     = (*java_builtins[i].creator) (method_return_type, call);
 615                   return result == NULL_TREE ? call : result;
 616                 }
 617
 618               /* Builtin functions emit a direct call which is incompatible
 619                  with the BC-ABI.  */
 620               if (flag_indirect_dispatch)
 621                 return call;
 622               fn = builtin_decl_explicit (java_builtins[i].builtin_code);
 623               if (fn == NULL_TREE)
 624                 return call;
 625               return java_build_function_call_expr (fn, call);
 626             }
 627         }
 628     }
 629   return call;
 630 }
 631
 632 #include "gt-java-builtins.h"