gcc/java/builtins.c

   1 /* Built-in and inline functions for gcj
   2    Copyright (C) 2001-2015 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 "alias.h"
  34 #include "symtab.h"
  35 #include "options.h"
  36 #include "tree.h"
  37 #include "fold-const.h"
  38 #include "stor-layout.h"
  39 #include "stringpool.h"
  40 #include "flags.h"
  41 #include "langhooks.h"
  42 #include "java-tree.h"
  43
  44 /* FIXME: All these headers are necessary for sync_compare_and_swap.
  45    Front ends should never have to look at that.  */
  46 #include "rtl.h"
  47 #include "insn-codes.h"
  48 #include "hard-reg-set.h"
  49 #include "function.h"
  50 #include "insn-config.h"
  51 #include "expmed.h"
  52 #include "dojump.h"
  53 #include "explow.h"
  54 #include "calls.h"
  55 #include "emit-rtl.h"
  56 #include "varasm.h"
  57 #include "stmt.h"
  58 #include "expr.h"
  59 #include "optabs.h"
  60
  61 static tree max_builtin (tree, tree);
  62 static tree min_builtin (tree, tree);
  63 static tree abs_builtin (tree, tree);
  64 static tree convert_real (tree, tree);
  65
  66 static tree java_build_function_call_expr (tree, tree);
  67
  68 static tree putObject_builtin (tree, tree);
  69 static tree compareAndSwapInt_builtin (tree, tree);
  70 static tree compareAndSwapLong_builtin (tree, tree);
  71 static tree compareAndSwapObject_builtin (tree, tree);
  72 static tree putVolatile_builtin (tree, tree);
  73 static tree getVolatile_builtin (tree, tree);
  74 static tree VMSupportsCS8_builtin (tree, tree);
  75 \f
  76
  77 /* Functions of this type are used to inline a given call.  Such a
  78    function should either return an expression, if the call is to be
  79    inlined, or NULL_TREE if a real call should be emitted.  Arguments
  80    are method return type and the original CALL_EXPR containing the
  81    arguments to the call.  */
  82 typedef tree builtin_creator_function (tree, tree);
  83
  84 /* Hold a char*, before initialization, or a tree, after
  85    initialization.  */
  86 union GTY(()) string_or_tree {
  87   const char * GTY ((tag ("0"))) s;
  88   tree GTY ((tag ("1"))) t;
  89 };
  90
  91 /* Used to hold a single builtin record.  */
  92 struct GTY(()) builtin_record {
  93   union string_or_tree GTY ((desc ("1"))) class_name;
  94   union string_or_tree GTY ((desc ("1"))) method_name;
  95   builtin_creator_function * GTY((skip)) creator;
  96   enum built_in_function builtin_code;
  97 };
  98
  99 static GTY(()) struct builtin_record java_builtins[] =
 100 {
 101   { { "java.lang.Math" }, { "min" }, min_builtin, (enum built_in_function) 0 },
 102   { { "java.lang.Math" }, { "max" }, max_builtin, (enum built_in_function) 0 },
 103   { { "java.lang.Math" }, { "abs" }, abs_builtin, (enum built_in_function) 0 },
 104   { { "java.lang.Math" }, { "acos" }, NULL, BUILT_IN_ACOS },
 105   { { "java.lang.Math" }, { "asin" }, NULL, BUILT_IN_ASIN },
 106   { { "java.lang.Math" }, { "atan" }, NULL, BUILT_IN_ATAN },
 107   { { "java.lang.Math" }, { "atan2" }, NULL, BUILT_IN_ATAN2 },
 108   { { "java.lang.Math" }, { "ceil" }, NULL, BUILT_IN_CEIL },
 109   { { "java.lang.Math" }, { "cos" }, NULL, BUILT_IN_COS },
 110   { { "java.lang.Math" }, { "exp" }, NULL, BUILT_IN_EXP },
 111   { { "java.lang.Math" }, { "floor" }, NULL, BUILT_IN_FLOOR },
 112   { { "java.lang.Math" }, { "log" }, NULL, BUILT_IN_LOG },
 113   { { "java.lang.Math" }, { "pow" }, NULL, BUILT_IN_POW },
 114   { { "java.lang.Math" }, { "sin" }, NULL, BUILT_IN_SIN },
 115   { { "java.lang.Math" }, { "sqrt" }, NULL, BUILT_IN_SQRT },
 116   { { "java.lang.Math" }, { "tan" }, NULL, BUILT_IN_TAN },
 117   { { "java.lang.Float" }, { "intBitsToFloat" }, convert_real,
 118     (enum built_in_function) 0 },
 119   { { "java.lang.Double" }, { "longBitsToDouble" }, convert_real,
 120     (enum built_in_function) 0 },
 121   { { "java.lang.Float" }, { "floatToRawIntBits" }, convert_real,
 122     (enum built_in_function) 0 },
 123   { { "java.lang.Double" }, { "doubleToRawLongBits" }, convert_real,
 124     (enum built_in_function) 0 },
 125   { { "sun.misc.Unsafe" }, { "putInt" }, putObject_builtin,
 126     (enum built_in_function) 0},
 127   { { "sun.misc.Unsafe" }, { "putLong" }, putObject_builtin,
 128     (enum built_in_function) 0},
 129   { { "sun.misc.Unsafe" }, { "putObject" }, putObject_builtin,
 130   (enum built_in_function) 0},
 131   { { "sun.misc.Unsafe" }, { "compareAndSwapInt" },
 132     compareAndSwapInt_builtin, (enum built_in_function) 0},
 133   { { "sun.misc.Unsafe" }, { "compareAndSwapLong" },
 134     compareAndSwapLong_builtin, (enum built_in_function) 0},
 135   { { "sun.misc.Unsafe" }, { "compareAndSwapObject" },
 136     compareAndSwapObject_builtin, (enum built_in_function) 0},
 137   { { "sun.misc.Unsafe" }, { "putOrderedInt" }, putVolatile_builtin,
 138     (enum built_in_function) 0},
 139   { { "sun.misc.Unsafe" }, { "putOrderedLong" }, putVolatile_builtin,
 140     (enum built_in_function) 0},
 141   { { "sun.misc.Unsafe" }, { "putOrderedObject" }, putVolatile_builtin,
 142     (enum built_in_function) 0},
 143   { { "sun.misc.Unsafe" }, { "putIntVolatile" }, putVolatile_builtin,
 144     (enum built_in_function) 0},
 145   { { "sun.misc.Unsafe" }, { "putLongVolatile" }, putVolatile_builtin,
 146     (enum built_in_function) 0},
 147   { { "sun.misc.Unsafe" }, { "putObjectVolatile" }, putVolatile_builtin,
 148     (enum built_in_function) 0},
 149   { { "sun.misc.Unsafe" }, { "getObjectVolatile" }, getVolatile_builtin,
 150     (enum built_in_function) 0},
 151   { { "sun.misc.Unsafe" }, { "getIntVolatile" }, getVolatile_builtin,
 152     (enum built_in_function) 0},
 153   { { "sun.misc.Unsafe" }, { "getLongVolatile" }, getVolatile_builtin, (enum built_in_function) 0},
 154   { { "sun.misc.Unsafe" }, { "getLong" }, getVolatile_builtin,
 155     (enum built_in_function) 0},
 156   { { "java.util.concurrent.atomic.AtomicLong" }, { "VMSupportsCS8" },
 157     VMSupportsCS8_builtin, (enum built_in_function) 0},
 158   { { NULL }, { NULL }, NULL, END_BUILTINS }
 159 };
 160
 161 \f
 162 /* Internal functions which implement various builtin conversions.  */
 163
 164 static tree
 165 max_builtin (tree method_return_type, tree orig_call)
 166 {
 167   /* MAX_EXPR does not handle -0.0 in the Java style.  */
 168   if (TREE_CODE (method_return_type) == REAL_TYPE)
 169     return NULL_TREE;
 170   return fold_build2 (MAX_EXPR, method_return_type,
 171                       CALL_EXPR_ARG (orig_call, 0),
 172                       CALL_EXPR_ARG (orig_call, 1));
 173 }
 174
 175 static tree
 176 min_builtin (tree method_return_type, tree orig_call)
 177 {
 178   /* MIN_EXPR does not handle -0.0 in the Java style.  */
 179   if (TREE_CODE (method_return_type) == REAL_TYPE)
 180     return NULL_TREE;
 181   return fold_build2 (MIN_EXPR, method_return_type,
 182                       CALL_EXPR_ARG (orig_call, 0),
 183                       CALL_EXPR_ARG (orig_call, 1));
 184 }
 185
 186 static tree
 187 abs_builtin (tree method_return_type, tree orig_call)
 188 {
 189   return fold_build1 (ABS_EXPR, method_return_type,
 190                       CALL_EXPR_ARG (orig_call, 0));
 191 }
 192
 193 /* Construct a new call to FN using the arguments from ORIG_CALL.  */
 194
 195 static tree
 196 java_build_function_call_expr (tree fn, tree orig_call)
 197 {
 198   int nargs = call_expr_nargs (orig_call);
 199   switch (nargs)
 200     {
 201       /* Although we could handle the 0-3 argument cases using the general
 202          logic in the default case, splitting them out permits folding to
 203          be performed without constructing a temporary CALL_EXPR.  */
 204     case 0:
 205       return build_call_expr (fn, 0);
 206     case 1:
 207       return build_call_expr (fn, 1, CALL_EXPR_ARG (orig_call, 0));
 208     case 2:
 209       return build_call_expr (fn, 2,
 210                               CALL_EXPR_ARG (orig_call, 0),
 211                               CALL_EXPR_ARG (orig_call, 1));
 212     case 3:
 213       return build_call_expr (fn, 3,
 214                               CALL_EXPR_ARG (orig_call, 0),
 215                               CALL_EXPR_ARG (orig_call, 1),
 216                               CALL_EXPR_ARG (orig_call, 2));
 217     default:
 218       {
 219         tree fntype = TREE_TYPE (fn);
 220         fn = build1 (ADDR_EXPR, build_pointer_type (fntype), fn);
 221         return fold (build_call_array (TREE_TYPE (fntype),
 222                                        fn, nargs, CALL_EXPR_ARGP (orig_call)));
 223       }
 224     }
 225 }
 226
 227 static tree
 228 convert_real (tree method_return_type, tree orig_call)
 229 {
 230   return build1 (VIEW_CONVERT_EXPR, method_return_type,
 231                  CALL_EXPR_ARG (orig_call, 0));
 232 }
 233
 234 \f
 235
 236 /* Provide builtin support for atomic operations.  These are
 237    documented at length in libjava/sun/misc/Unsafe.java.  */
 238
 239 /* FIXME.  There are still a few things wrong with this logic.  In
 240    particular, atomic writes of multi-word integers are not truly
 241    atomic: this requires more work.
 242
 243    In general, double-word compare-and-swap cannot portably be
 244    implemented, so we need some kind of fallback for 32-bit machines.
 245
 246 */
 247
 248
 249 /* Macros to unmarshal arguments from a CALL_EXPR into a few
 250    variables.  We also convert the offset arg from a long to an
 251    integer that is the same size as a pointer.  */
 252
 253 #define UNMARSHAL3(METHOD_CALL)                                 \
 254 tree this_arg, obj_arg, offset_arg;                                     \
 255 do                                                                      \
 256 {                                                                       \
 257   tree orig_method_call = METHOD_CALL;                                  \
 258   this_arg = CALL_EXPR_ARG (orig_method_call, 0);                       \
 259   obj_arg = CALL_EXPR_ARG (orig_method_call, 1);                        \
 260   offset_arg = fold_convert (java_type_for_size (POINTER_SIZE, 0),      \
 261                              CALL_EXPR_ARG (orig_method_call, 2));      \
 262 }                                                                       \
 263 while (0)
 264
 265 #define UNMARSHAL4(METHOD_CALL)                                 \
 266 tree value_type, this_arg, obj_arg, offset_arg, value_arg;              \
 267 do                                                                      \
 268 {                                                                       \
 269   tree orig_method_call = METHOD_CALL;                                  \
 270   this_arg = CALL_EXPR_ARG (orig_method_call, 0);                       \
 271   obj_arg = CALL_EXPR_ARG (orig_method_call, 1);                        \
 272   offset_arg = fold_convert (java_type_for_size (POINTER_SIZE, 0),      \
 273                              CALL_EXPR_ARG (orig_method_call, 2));      \
 274   value_arg = CALL_EXPR_ARG (orig_method_call, 3);                      \
 275   value_type = TREE_TYPE (value_arg);                                   \
 276 }                                                                       \
 277 while (0)
 278
 279 #define UNMARSHAL5(METHOD_CALL)                                 \
 280 tree value_type, this_arg, obj_arg, offset_arg, expected_arg, value_arg; \
 281 do                                                                      \
 282 {                                                                       \
 283   tree orig_method_call = METHOD_CALL;                                  \
 284   this_arg = CALL_EXPR_ARG (orig_method_call, 0);                       \
 285   obj_arg = CALL_EXPR_ARG (orig_method_call, 1);                        \
 286   offset_arg = fold_convert (java_type_for_size (POINTER_SIZE, 0),      \
 287                              CALL_EXPR_ARG (orig_method_call, 2));      \
 288   expected_arg = CALL_EXPR_ARG (orig_method_call, 3);                   \
 289   value_arg = CALL_EXPR_ARG (orig_method_call, 4);                      \
 290   value_type = TREE_TYPE (value_arg);                                   \
 291 }                                                                       \
 292 while (0)
 293
 294 /* Add an address to an offset, forming a sum.  */
 295
 296 static tree
 297 build_addr_sum (tree type, tree addr, tree offset)
 298 {
 299   tree ptr_type = build_pointer_type (type);
 300   return fold_build_pointer_plus (fold_convert (ptr_type, addr), offset);
 301 }
 302
 303 /* Make sure that this-arg is non-NULL.  This is a security check.  */
 304
 305 static tree
 306 build_check_this (tree stmt, tree this_arg)
 307 {
 308   return build2 (COMPOUND_EXPR, TREE_TYPE (stmt),
 309                  java_check_reference (this_arg, 1), stmt);
 310 }
 311
 312 /* Now the builtins.  These correspond to the primitive functions in
 313    libjava/sun/misc/natUnsafe.cc.  */
 314
 315 static tree
 316 putObject_builtin (tree method_return_type ATTRIBUTE_UNUSED,
 317                    tree orig_call)
 318 {
 319   tree addr, stmt;
 320   UNMARSHAL4 (orig_call);
 321
 322   addr = build_addr_sum (value_type, obj_arg, offset_arg);
 323   stmt = fold_build2 (MODIFY_EXPR, value_type,
 324                       build_java_indirect_ref (value_type, addr,
 325                                                flag_check_references),
 326                       value_arg);
 327
 328   return build_check_this (stmt, this_arg);
 329 }
 330
 331 static tree
 332 compareAndSwapInt_builtin (tree method_return_type ATTRIBUTE_UNUSED,
 333                            tree orig_call)
 334 {
 335   machine_mode mode = TYPE_MODE (int_type_node);
 336   if (can_compare_and_swap_p (mode, flag_use_atomic_builtins))
 337     {
 338       tree addr, stmt;
 339       enum built_in_function fncode = BUILT_IN_SYNC_BOOL_COMPARE_AND_SWAP_4;
 340       UNMARSHAL5 (orig_call);
 341       (void) value_type; /* Avoid set but not used warning.  */
 342
 343       addr = build_addr_sum (int_type_node, obj_arg, offset_arg);
 344       stmt = build_call_expr (builtin_decl_explicit (fncode),
 345                               3, addr, expected_arg, value_arg);
 346
 347       return build_check_this (stmt, this_arg);
 348     }
 349   return NULL_TREE;
 350 }
 351
 352 static tree
 353 compareAndSwapLong_builtin (tree method_return_type ATTRIBUTE_UNUSED,
 354                             tree orig_call)
 355 {
 356   machine_mode mode = TYPE_MODE (long_type_node);
 357   /* We don't trust flag_use_atomic_builtins for multi-word compareAndSwap.
 358      Some machines such as ARM have atomic libfuncs but not the multi-word
 359      versions.  */
 360   if (can_compare_and_swap_p (mode,
 361                               (flag_use_atomic_builtins
 362                                && GET_MODE_SIZE (mode) <= UNITS_PER_WORD)))
 363     {
 364       tree addr, stmt;
 365       enum built_in_function fncode = BUILT_IN_SYNC_BOOL_COMPARE_AND_SWAP_8;
 366       UNMARSHAL5 (orig_call);
 367       (void) value_type; /* Avoid set but not used warning.  */
 368
 369       addr = build_addr_sum (long_type_node, obj_arg, offset_arg);
 370       stmt = build_call_expr (builtin_decl_explicit (fncode),
 371                               3, addr, expected_arg, value_arg);
 372
 373       return build_check_this (stmt, this_arg);
 374     }
 375   return NULL_TREE;
 376 }
 377 static tree
 378 compareAndSwapObject_builtin (tree method_return_type ATTRIBUTE_UNUSED,
 379                               tree orig_call)
 380 {
 381   machine_mode mode = TYPE_MODE (ptr_type_node);
 382   if (can_compare_and_swap_p (mode, flag_use_atomic_builtins))
 383   {
 384     tree addr, stmt;
 385     enum built_in_function builtin;
 386
 387     UNMARSHAL5 (orig_call);
 388     builtin = (POINTER_SIZE == 32
 389                ? BUILT_IN_SYNC_BOOL_COMPARE_AND_SWAP_4
 390                : BUILT_IN_SYNC_BOOL_COMPARE_AND_SWAP_8);
 391
 392     addr = build_addr_sum (value_type, obj_arg, offset_arg);
 393     stmt = build_call_expr (builtin_decl_explicit (builtin),
 394                             3, addr, expected_arg, value_arg);
 395
 396     return build_check_this (stmt, this_arg);
 397   }
 398   return NULL_TREE;
 399 }
 400
 401 static tree
 402 putVolatile_builtin (tree method_return_type ATTRIBUTE_UNUSED,
 403                      tree orig_call)
 404 {
 405   tree addr, stmt, modify_stmt;
 406   UNMARSHAL4 (orig_call);
 407
 408   addr = build_addr_sum (value_type, obj_arg, offset_arg);
 409   addr
 410     = fold_convert (build_pointer_type (build_qualified_type
 411                                         (value_type, TYPE_QUAL_VOLATILE)),
 412                     addr);
 413
 414   stmt = build_call_expr (builtin_decl_explicit (BUILT_IN_SYNC_SYNCHRONIZE), 0);
 415   modify_stmt = fold_build2 (MODIFY_EXPR, value_type,
 416                              build_java_indirect_ref (value_type, addr,
 417                                                       flag_check_references),
 418                              value_arg);
 419   stmt = build2 (COMPOUND_EXPR, TREE_TYPE (modify_stmt),
 420                  stmt, modify_stmt);
 421
 422   return build_check_this (stmt, this_arg);
 423 }
 424
 425 static tree
 426 getVolatile_builtin (tree method_return_type ATTRIBUTE_UNUSED,
 427                      tree orig_call)
 428 {
 429   tree addr, stmt, modify_stmt, tmp;
 430   UNMARSHAL3 (orig_call);
 431   (void) this_arg; /* Avoid set but not used warning.  */
 432
 433   addr = build_addr_sum (method_return_type, obj_arg, offset_arg);
 434   addr
 435     = fold_convert (build_pointer_type (build_qualified_type
 436                                         (method_return_type,
 437                                          TYPE_QUAL_VOLATILE)), addr);
 438
 439   stmt = build_call_expr (builtin_decl_explicit (BUILT_IN_SYNC_SYNCHRONIZE), 0);
 440   tmp = build_decl (BUILTINS_LOCATION, VAR_DECL, NULL, method_return_type);
 441   DECL_IGNORED_P (tmp) = 1;
 442   DECL_ARTIFICIAL (tmp) = 1;
 443   pushdecl (tmp);
 444
 445   modify_stmt = fold_build2 (MODIFY_EXPR, method_return_type,
 446                              tmp,
 447                              build_java_indirect_ref (method_return_type, addr,
 448                                                       flag_check_references));
 449
 450   stmt = build2 (COMPOUND_EXPR, void_type_node, modify_stmt, stmt);
 451   stmt = build2 (COMPOUND_EXPR, method_return_type, stmt, tmp);
 452
 453   return stmt;
 454 }
 455
 456 static tree
 457 VMSupportsCS8_builtin (tree method_return_type,
 458                        tree orig_call ATTRIBUTE_UNUSED)
 459 {
 460   machine_mode mode = TYPE_MODE (long_type_node);
 461   gcc_assert (method_return_type == boolean_type_node);
 462   if (can_compare_and_swap_p (mode, false))
 463     return boolean_true_node;
 464   else
 465     return boolean_false_node;
 466 }
 467
 468 \f
 469
 470 /* Define a single builtin.  */
 471 static void
 472 define_builtin (enum built_in_function val,
 473                 const char *name,
 474                 tree type,
 475                 const char *libname,
 476                 int flags)
 477 {
 478   tree decl;
 479
 480   decl = build_decl (BUILTINS_LOCATION,
 481                      FUNCTION_DECL, get_identifier (name), type);
 482   DECL_EXTERNAL (decl) = 1;
 483   TREE_PUBLIC (decl) = 1;
 484   SET_DECL_ASSEMBLER_NAME (decl, get_identifier (libname));
 485   pushdecl (decl);
 486   DECL_BUILT_IN_CLASS (decl) = BUILT_IN_NORMAL;
 487   DECL_FUNCTION_CODE (decl) = val;
 488   set_call_expr_flags (decl, flags);
 489
 490   set_builtin_decl (val, decl, true);
 491 }
 492
 493 \f
 494
 495 /* Initialize the builtins.  */
 496 void
 497 initialize_builtins (void)
 498 {
 499   tree double_ftype_double, double_ftype_double_double;
 500   tree float_ftype_float_float;
 501   tree boolean_ftype_boolean_boolean;
 502   int i;
 503
 504   for (i = 0; java_builtins[i].builtin_code != END_BUILTINS; ++i)
 505     {
 506       tree klass_id = get_identifier (java_builtins[i].class_name.s);
 507       tree m = get_identifier (java_builtins[i].method_name.s);
 508
 509       java_builtins[i].class_name.t = klass_id;
 510       java_builtins[i].method_name.t = m;
 511     }
 512
 513   void_list_node = end_params_node;
 514
 515   float_ftype_float_float
 516     = build_function_type_list (float_type_node,
 517                                 float_type_node, float_type_node, NULL_TREE);
 518
 519   double_ftype_double
 520     = build_function_type_list (double_type_node, double_type_node, NULL_TREE);
 521   double_ftype_double_double
 522     = build_function_type_list (double_type_node,
 523                                 double_type_node, double_type_node, NULL_TREE);
 524
 525   define_builtin (BUILT_IN_FMOD, "__builtin_fmod",
 526                   double_ftype_double_double, "fmod", ECF_CONST);
 527   define_builtin (BUILT_IN_FMODF, "__builtin_fmodf",
 528                   float_ftype_float_float, "fmodf", ECF_CONST);
 529
 530   define_builtin (BUILT_IN_ACOS, "__builtin_acos",
 531                   double_ftype_double, "_ZN4java4lang4Math4acosEJdd",
 532                   ECF_CONST);
 533   define_builtin (BUILT_IN_ASIN, "__builtin_asin",
 534                   double_ftype_double, "_ZN4java4lang4Math4asinEJdd",
 535                   ECF_CONST);
 536   define_builtin (BUILT_IN_ATAN, "__builtin_atan",
 537                   double_ftype_double, "_ZN4java4lang4Math4atanEJdd",
 538                   ECF_CONST);
 539   define_builtin (BUILT_IN_ATAN2, "__builtin_atan2",
 540                   double_ftype_double_double, "_ZN4java4lang4Math5atan2EJddd",
 541                   ECF_CONST);
 542   define_builtin (BUILT_IN_CEIL, "__builtin_ceil",
 543                   double_ftype_double, "_ZN4java4lang4Math4ceilEJdd",
 544                   ECF_CONST);
 545   define_builtin (BUILT_IN_COS, "__builtin_cos",
 546                   double_ftype_double, "_ZN4java4lang4Math3cosEJdd",
 547                   ECF_CONST);
 548   define_builtin (BUILT_IN_EXP, "__builtin_exp",
 549                   double_ftype_double, "_ZN4java4lang4Math3expEJdd",
 550                   ECF_CONST);
 551   define_builtin (BUILT_IN_FLOOR, "__builtin_floor",
 552                   double_ftype_double, "_ZN4java4lang4Math5floorEJdd",
 553                   ECF_CONST);
 554   define_builtin (BUILT_IN_LOG, "__builtin_log",
 555                   double_ftype_double, "_ZN4java4lang4Math3logEJdd",
 556                   ECF_CONST);
 557   define_builtin (BUILT_IN_POW, "__builtin_pow",
 558                   double_ftype_double_double, "_ZN4java4lang4Math3powEJddd",
 559                   ECF_CONST);
 560   define_builtin (BUILT_IN_SIN, "__builtin_sin",
 561                   double_ftype_double, "_ZN4java4lang4Math3sinEJdd",
 562                   ECF_CONST);
 563   define_builtin (BUILT_IN_SQRT, "__builtin_sqrt",
 564                   double_ftype_double, "_ZN4java4lang4Math4sqrtEJdd",
 565                   ECF_CONST);
 566   define_builtin (BUILT_IN_TAN, "__builtin_tan",
 567                   double_ftype_double, "_ZN4java4lang4Math3tanEJdd",
 568                   ECF_CONST);
 569
 570   boolean_ftype_boolean_boolean
 571     = build_function_type_list (boolean_type_node,
 572                                 boolean_type_node, boolean_type_node,
 573                                 NULL_TREE);
 574   define_builtin (BUILT_IN_EXPECT, "__builtin_expect",
 575                   boolean_ftype_boolean_boolean,
 576                   "__builtin_expect",
 577                   ECF_CONST | ECF_NOTHROW);
 578   define_builtin (BUILT_IN_SYNC_BOOL_COMPARE_AND_SWAP_4,
 579                   "__sync_bool_compare_and_swap_4",
 580                   build_function_type_list (boolean_type_node,
 581                                             int_type_node,
 582                                             build_pointer_type (int_type_node),
 583                                             int_type_node, NULL_TREE),
 584                   "__sync_bool_compare_and_swap_4", ECF_NOTHROW | ECF_LEAF);
 585   define_builtin (BUILT_IN_SYNC_BOOL_COMPARE_AND_SWAP_8,
 586                   "__sync_bool_compare_and_swap_8",
 587                   build_function_type_list (boolean_type_node,
 588                                             long_type_node,
 589                                             build_pointer_type (long_type_node),
 590                                             int_type_node, NULL_TREE),
 591                   "__sync_bool_compare_and_swap_8", ECF_NOTHROW | ECF_LEAF);
 592   define_builtin (BUILT_IN_SYNC_SYNCHRONIZE, "__sync_synchronize",
 593                   build_function_type_list (void_type_node, NULL_TREE),
 594                   "__sync_synchronize", ECF_NOTHROW | ECF_LEAF);
 595
 596   define_builtin (BUILT_IN_RETURN_ADDRESS, "__builtin_return_address",
 597                   build_function_type_list (ptr_type_node, int_type_node, NULL_TREE),
 598                   "__builtin_return_address", ECF_NOTHROW | ECF_LEAF);
 599   define_builtin (BUILT_IN_TRAP, "__builtin_trap",
 600                   build_function_type_list (void_type_node, NULL_TREE),
 601                   "__builtin_trap", ECF_NOTHROW | ECF_LEAF | ECF_NORETURN);
 602   build_common_builtin_nodes ();
 603 }
 604
 605 /* If the call matches a builtin, return the
 606    appropriate builtin expression instead.  */
 607 tree
 608 check_for_builtin (tree method, tree call)
 609 {
 610   if (optimize && TREE_CODE (call) == CALL_EXPR)
 611     {
 612       int i;
 613       tree method_class = DECL_NAME (TYPE_NAME (DECL_CONTEXT (method)));
 614       tree method_name = DECL_NAME (method);
 615       tree method_return_type = TREE_TYPE (TREE_TYPE (method));
 616
 617       for (i = 0; java_builtins[i].builtin_code != END_BUILTINS; ++i)
 618         {
 619           if (method_class == java_builtins[i].class_name.t
 620               && method_name == java_builtins[i].method_name.t)
 621             {
 622               tree fn;
 623
 624               if (java_builtins[i].creator != NULL)
 625                 {
 626                   tree result
 627                     = (*java_builtins[i].creator) (method_return_type, call);
 628                   return result == NULL_TREE ? call : result;
 629                 }
 630
 631               /* Builtin functions emit a direct call which is incompatible
 632                  with the BC-ABI.  */
 633               if (flag_indirect_dispatch)
 634                 return call;
 635               fn = builtin_decl_explicit (java_builtins[i].builtin_code);
 636               if (fn == NULL_TREE)
 637                 return call;
 638               return java_build_function_call_expr (fn, call);
 639             }
 640         }
 641     }
 642   return call;
 643 }
 644
 645 #include "gt-java-builtins.h"