old-autovect-branch/gcc/java/builtins.c

   1 /* Built-in and inline functions for gcj
   2    Copyright (C) 2001, 2003, 2004, 2005
   3    Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GCC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  20 Boston, MA 02110-1301, USA.
  21
  22 Java and all Java-based marks are trademarks or registered trademarks
  23 of Sun Microsystems, Inc. in the United States and other countries.
  24 The Free Software Foundation is independent of Sun Microsystems, Inc.  */
  25
  26 /* Written by Tom Tromey <tromey@redhat.com>.  */
  27
  28 #include "config.h"
  29 #include "system.h"
  30 #include "coretypes.h"
  31 #include "tm.h"
  32 #include "tree.h"
  33 #include "ggc.h"
  34 #include "flags.h"
  35 #include "langhooks.h"
  36 #include "java-tree.h"
  37
  38
  39 static tree max_builtin (tree, tree);
  40 static tree min_builtin (tree, tree);
  41 static tree abs_builtin (tree, tree);
  42
  43 static tree java_build_function_call_expr (tree, tree);
  44
  45 \f
  46
  47 /* Functions of this type are used to inline a given call.  Such a
  48    function should either return an expression, if the call is to be
  49    inlined, or NULL_TREE if a real call should be emitted.  Arguments
  50    are method return type and arguments to call.  */
  51 typedef tree builtin_creator_function (tree, tree);
  52
  53 /* Hold a char*, before initialization, or a tree, after
  54    initialization.  */
  55 union string_or_tree GTY(())
  56 {
  57   const char * GTY ((tag ("0"))) s;
  58   tree GTY ((tag ("1"))) t;
  59 };
  60
  61 /* Used to hold a single builtin record.  */
  62 struct builtin_record GTY(())
  63 {
  64   union string_or_tree GTY ((desc ("1"))) class_name;
  65   union string_or_tree GTY ((desc ("1"))) method_name;
  66   builtin_creator_function * GTY((skip)) creator;
  67   enum built_in_function builtin_code;
  68 };
  69
  70 static GTY(()) struct builtin_record java_builtins[] =
  71 {
  72   { { "java.lang.Math" }, { "min" }, min_builtin, 0 },
  73   { { "java.lang.Math" }, { "max" }, max_builtin, 0 },
  74   { { "java.lang.Math" }, { "abs" }, abs_builtin, 0 },
  75   { { "java.lang.Math" }, { "acos" }, NULL, BUILT_IN_ACOS },
  76   { { "java.lang.Math" }, { "asin" }, NULL, BUILT_IN_ASIN },
  77   { { "java.lang.Math" }, { "atan" }, NULL, BUILT_IN_ATAN },
  78   { { "java.lang.Math" }, { "atan2" }, NULL, BUILT_IN_ATAN2 },
  79   { { "java.lang.Math" }, { "ceil" }, NULL, BUILT_IN_CEIL },
  80   { { "java.lang.Math" }, { "cos" }, NULL, BUILT_IN_COS },
  81   { { "java.lang.Math" }, { "exp" }, NULL, BUILT_IN_EXP },
  82   { { "java.lang.Math" }, { "floor" }, NULL, BUILT_IN_FLOOR },
  83   { { "java.lang.Math" }, { "log" }, NULL, BUILT_IN_LOG },
  84   { { "java.lang.Math" }, { "pow" }, NULL, BUILT_IN_POW },
  85   { { "java.lang.Math" }, { "sin" }, NULL, BUILT_IN_SIN },
  86   { { "java.lang.Math" }, { "sqrt" }, NULL, BUILT_IN_SQRT },
  87   { { "java.lang.Math" }, { "tan" }, NULL, BUILT_IN_TAN },
  88   { { NULL }, { NULL }, NULL, END_BUILTINS }
  89 };
  90
  91 \f
  92 /* Internal functions which implement various builtin conversions.  */
  93
  94 static tree
  95 max_builtin (tree method_return_type, tree method_arguments)
  96 {
  97   return fold_build2 (MAX_EXPR, method_return_type,
  98                       TREE_VALUE (method_arguments),
  99                       TREE_VALUE (TREE_CHAIN (method_arguments)));
 100 }
 101
 102 static tree
 103 min_builtin (tree method_return_type, tree method_arguments)
 104 {
 105   return fold_build2 (MIN_EXPR, method_return_type,
 106                       TREE_VALUE (method_arguments),
 107                       TREE_VALUE (TREE_CHAIN (method_arguments)));
 108 }
 109
 110 static tree
 111 abs_builtin (tree method_return_type, tree method_arguments)
 112 {
 113   return fold_build1 (ABS_EXPR, method_return_type,
 114                       TREE_VALUE (method_arguments));
 115 }
 116
 117 /* Mostly copied from ../builtins.c.  */
 118 static tree
 119 java_build_function_call_expr (tree fn, tree arglist)
 120 {
 121   tree call_expr;
 122
 123   call_expr = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (fn)), fn);
 124   return fold_build3 (CALL_EXPR, TREE_TYPE (TREE_TYPE (fn)),
 125                       call_expr, arglist, NULL_TREE);
 126 }
 127
 128 \f
 129
 130 #define BUILTIN_NOTHROW 1
 131 #define BUILTIN_CONST 2
 132 /* Define a single builtin.  */
 133 static void
 134 define_builtin (enum built_in_function val,
 135                 const char *name,
 136                 tree type,
 137                 const char *libname,
 138                 int flags)
 139 {
 140   tree decl;
 141
 142   decl = build_decl (FUNCTION_DECL, get_identifier (name), type);
 143   DECL_EXTERNAL (decl) = 1;
 144   TREE_PUBLIC (decl) = 1;
 145   SET_DECL_ASSEMBLER_NAME (decl, get_identifier (libname));
 146   pushdecl (decl);
 147   DECL_BUILT_IN_CLASS (decl) = BUILT_IN_NORMAL;
 148   DECL_FUNCTION_CODE (decl) = val;
 149   if (flags & BUILTIN_NOTHROW)
 150     TREE_NOTHROW (decl) = 1;
 151   if (flags & BUILTIN_CONST)
 152     TREE_READONLY (decl) = 1;
 153
 154   implicit_built_in_decls[val] = decl;
 155   built_in_decls[val] = decl;
 156 }
 157
 158 \f
 159
 160 /* Initialize the builtins.  */
 161 void
 162 initialize_builtins (void)
 163 {
 164   tree double_ftype_double, double_ftype_double_double;
 165   tree float_ftype_float, float_ftype_float_float;
 166   tree boolean_ftype_boolean_boolean;
 167   tree t;
 168   int i;
 169
 170   for (i = 0; java_builtins[i].builtin_code != END_BUILTINS; ++i)
 171     {
 172       tree klass_id = get_identifier (java_builtins[i].class_name.s);
 173       tree m = get_identifier (java_builtins[i].method_name.s);
 174
 175       java_builtins[i].class_name.t = klass_id;
 176       java_builtins[i].method_name.t = m;
 177     }
 178
 179   void_list_node = end_params_node;
 180
 181   t = tree_cons (NULL_TREE, float_type_node, end_params_node);
 182   float_ftype_float = build_function_type (float_type_node, t);
 183   t = tree_cons (NULL_TREE, float_type_node, t);
 184   float_ftype_float_float = build_function_type (float_type_node, t);
 185
 186   t = tree_cons (NULL_TREE, double_type_node, end_params_node);
 187   double_ftype_double = build_function_type (double_type_node, t);
 188   t = tree_cons (NULL_TREE, double_type_node, t);
 189   double_ftype_double_double = build_function_type (double_type_node, t);
 190
 191   define_builtin (BUILT_IN_FMOD, "__builtin_fmod",
 192                   double_ftype_double_double, "fmod", BUILTIN_CONST);
 193   define_builtin (BUILT_IN_FMODF, "__builtin_fmodf",
 194                   float_ftype_float_float, "fmodf", BUILTIN_CONST);
 195
 196   define_builtin (BUILT_IN_ACOS, "__builtin_acos",
 197                   double_ftype_double, "_ZN4java4lang4Math4acosEJdd",
 198                   BUILTIN_CONST);
 199   define_builtin (BUILT_IN_ASIN, "__builtin_asin",
 200                   double_ftype_double, "_ZN4java4lang4Math4asinEJdd",
 201                   BUILTIN_CONST);
 202   define_builtin (BUILT_IN_ATAN, "__builtin_atan",
 203                   double_ftype_double, "_ZN4java4lang4Math4atanEJdd",
 204                   BUILTIN_CONST);
 205   define_builtin (BUILT_IN_ATAN2, "__builtin_atan2",
 206                   double_ftype_double_double, "_ZN4java4lang4Math5atan2EJddd",
 207                   BUILTIN_CONST);
 208   define_builtin (BUILT_IN_CEIL, "__builtin_ceil",
 209                   double_ftype_double, "_ZN4java4lang4Math4ceilEJdd",
 210                   BUILTIN_CONST);
 211   define_builtin (BUILT_IN_COS, "__builtin_cos",
 212                   double_ftype_double, "_ZN4java4lang4Math3cosEJdd",
 213                   BUILTIN_CONST);
 214   define_builtin (BUILT_IN_EXP, "__builtin_exp",
 215                   double_ftype_double, "_ZN4java4lang4Math3expEJdd",
 216                   BUILTIN_CONST);
 217   define_builtin (BUILT_IN_FLOOR, "__builtin_floor",
 218                   double_ftype_double, "_ZN4java4lang4Math5floorEJdd",
 219                   BUILTIN_CONST);
 220   define_builtin (BUILT_IN_LOG, "__builtin_log",
 221                   double_ftype_double, "_ZN4java4lang4Math3logEJdd",
 222                   BUILTIN_CONST);
 223   define_builtin (BUILT_IN_POW, "__builtin_pow",
 224                   double_ftype_double_double, "_ZN4java4lang4Math3powEJddd",
 225                   BUILTIN_CONST);
 226   define_builtin (BUILT_IN_SIN, "__builtin_sin",
 227                   double_ftype_double, "_ZN4java4lang4Math3sinEJdd",
 228                   BUILTIN_CONST);
 229   define_builtin (BUILT_IN_SQRT, "__builtin_sqrt",
 230                   double_ftype_double, "_ZN4java4lang4Math4sqrtEJdd",
 231                   BUILTIN_CONST);
 232   define_builtin (BUILT_IN_TAN, "__builtin_tan",
 233                   double_ftype_double, "_ZN4java4lang4Math3tanEJdd",
 234                   BUILTIN_CONST);
 235
 236   t = tree_cons (NULL_TREE, boolean_type_node, end_params_node);
 237   t = tree_cons (NULL_TREE, boolean_type_node, t);
 238   boolean_ftype_boolean_boolean = build_function_type (boolean_type_node, t);
 239   define_builtin (BUILT_IN_EXPECT, "__builtin_expect",
 240                   boolean_ftype_boolean_boolean,
 241                   "__builtin_expect",
 242                   BUILTIN_CONST | BUILTIN_NOTHROW);
 243
 244   build_common_builtin_nodes ();
 245 }
 246
 247 /* If the call matches a builtin, return the
 248    appropriate builtin expression instead.  */
 249 tree
 250 check_for_builtin (tree method, tree call)
 251 {
 252   if (! flag_emit_class_files && optimize && TREE_CODE (call) == CALL_EXPR)
 253     {
 254       int i;
 255       tree method_arguments = TREE_OPERAND (call, 1);
 256       tree method_class = DECL_NAME (TYPE_NAME (DECL_CONTEXT (method)));
 257       tree method_name = DECL_NAME (method);
 258       tree method_return_type = TREE_TYPE (TREE_TYPE (method));
 259
 260       for (i = 0; java_builtins[i].builtin_code != END_BUILTINS; ++i)
 261         {
 262           if (method_class == java_builtins[i].class_name.t
 263               && method_name == java_builtins[i].method_name.t)
 264             {
 265               tree fn;
 266
 267               if (java_builtins[i].creator != NULL)
 268                 return (*java_builtins[i].creator) (method_return_type,
 269                                                     method_arguments);
 270               fn = built_in_decls[java_builtins[i].builtin_code];
 271               if (fn == NULL_TREE)
 272                 return NULL_TREE;
 273               return java_build_function_call_expr (fn, method_arguments);
 274             }
 275         }
 276     }
 277   return call;
 278 }
 279
 280 #include "gt-java-builtins.h"