1 /* Java(TM) language-specific utility routines.
2 Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
3 Free Software Foundation, Inc.
5 This file is part of GCC.
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)
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.
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, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA.
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. */
26 /* Hacked by Per Bothner <bothner@cygnus.com> February 1996. */
30 #include "coretypes.h"
36 #include "java-tree.h"
39 #include "langhooks.h"
40 #include "langhooks-def.h"
44 #include "diagnostic.h"
45 #include "tree-inline.h"
46 #include "splay-tree.h"
47 #include "tree-dump.h"
51 static bool java_init (void);
52 static void java_finish (void);
53 static unsigned int java_init_options (unsigned int, const char **);
54 static bool java_post_options (const char **);
56 static int java_handle_option (size_t scode, const char *arg, int value);
57 static void put_decl_string (const char *, int);
58 static void put_decl_node (tree);
59 static void java_print_error_function (diagnostic_context *, const char *);
60 static tree java_tree_inlining_walk_subtrees (tree *, int *, walk_tree_fn,
62 static int java_unsafe_for_reeval (tree);
63 static int merge_init_test_initialization (void * *, void *);
64 static int inline_init_test_initialization (void * *, void *);
65 static bool java_can_use_bit_fields_p (void);
66 static bool java_dump_tree (void *, tree);
67 static void dump_compound_expr (dump_info_p, tree);
68 static bool java_decl_ok_for_sibcall (tree);
69 static int java_estimate_num_insns (tree);
70 static int java_start_inlining (tree);
71 static tree java_get_callee_fndecl (tree);
73 #ifndef TARGET_OBJECT_SUFFIX
74 # define TARGET_OBJECT_SUFFIX ".o"
77 /* Table indexed by tree code giving a string containing a character
78 classifying the tree code. Possibilities are
79 t, d, s, c, r, <, 1 and 2. See java/java-tree.def for details. */
81 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) TYPE,
83 const char tree_code_type[] = {
86 #include "java-tree.def"
90 /* Table indexed by tree code giving number of expression
91 operands beyond the fixed part of the node structure.
92 Not used for types or decls. */
94 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) LENGTH,
96 const unsigned char tree_code_length[] = {
99 #include "java-tree.def"
103 /* Names of tree components.
104 Used for printing out the tree and error messages. */
105 #define DEFTREECODE(SYM, NAME, TYPE, LEN) NAME,
107 const char *const tree_code_name[] = {
110 #include "java-tree.def"
114 /* Used to avoid printing error messages with bogus function
115 prototypes. Starts out false. */
116 static bool inhibit_error_function_printing;
118 int compiling_from_source;
120 const char *resource_name;
122 int flag_emit_class_files = 0;
124 /* Nonzero if input file is a file with a list of filenames to compile. */
126 int flag_filelist_file = 0;
128 /* When nonzero, we emit xref strings. Values of the flag for xref
129 backends are defined in xref_flag_table, xref.c. */
131 int flag_emit_xref = 0;
133 /* When nonzero, -Wall was turned on. */
136 /* When nonzero, check for redundant modifier uses. */
137 int flag_redundant = 0;
139 /* When nonzero, call a library routine to do integer divisions. */
140 int flag_use_divide_subroutine = 1;
142 /* When nonzero, generate code for the Boehm GC. */
143 int flag_use_boehm_gc = 0;
145 /* When nonzero, assume the runtime uses a hash table to map an
146 object to its synchronization structure. */
147 int flag_hash_synchronization;
149 /* When nonzero, permit the use of the assert keyword. */
152 /* When nonzero, assume all native functions are implemented with
156 /* When nonzero, warn when source file is newer than matching class
160 /* When nonzero, generate checks for references to NULL. */
161 int flag_check_references = 0;
163 /* The encoding of the source file. */
164 const char *current_encoding = NULL;
166 /* When nonzero, report the now deprecated empty statements. */
167 int flag_extraneous_semicolon;
169 /* When nonzero, report use of deprecated classes, methods, or fields. */
170 int flag_deprecated = 1;
172 /* When nonzero, always check for a non gcj generated classes archive. */
173 int flag_force_classes_archive_check;
175 /* When zero, don't optimize static class initialization. This flag shouldn't
176 be tested alone, use STATIC_CLASS_INITIALIZATION_OPTIMIZATION_P instead. */
177 int flag_optimize_sci = 1;
179 /* When nonzero, use offset tables for virtual method calls
180 in order to improve binary compatibility. */
181 int flag_indirect_dispatch = 0;
183 /* When zero, don't generate runtime array store checks. */
184 int flag_store_check = 1;
186 /* When nonzero, print extra version information. */
187 static int v_flag = 0;
189 /* Set nonzero if the user specified -finline-functions on the command
191 int flag_really_inline = 0;
195 /* Variable controlling how dependency tracking is enabled in
197 static int dependency_tracking = 0;
199 /* Flag values for DEPENDENCY_TRACKING. */
200 #define DEPEND_SET_FILE 1
201 #define DEPEND_ENABLE 2
202 #define DEPEND_TARGET_SET 4
203 #define DEPEND_FILE_ALREADY_SET 8
205 struct language_function GTY(())
210 #undef LANG_HOOKS_NAME
211 #define LANG_HOOKS_NAME "GNU Java"
212 #undef LANG_HOOKS_INIT
213 #define LANG_HOOKS_INIT java_init
214 #undef LANG_HOOKS_FINISH
215 #define LANG_HOOKS_FINISH java_finish
216 #undef LANG_HOOKS_INIT_OPTIONS
217 #define LANG_HOOKS_INIT_OPTIONS java_init_options
218 #undef LANG_HOOKS_HANDLE_OPTION
219 #define LANG_HOOKS_HANDLE_OPTION java_handle_option
220 #undef LANG_HOOKS_POST_OPTIONS
221 #define LANG_HOOKS_POST_OPTIONS java_post_options
222 #undef LANG_HOOKS_PARSE_FILE
223 #define LANG_HOOKS_PARSE_FILE java_parse_file
224 #undef LANG_HOOKS_UNSAFE_FOR_REEVAL
225 #define LANG_HOOKS_UNSAFE_FOR_REEVAL java_unsafe_for_reeval
226 #undef LANG_HOOKS_MARK_ADDRESSABLE
227 #define LANG_HOOKS_MARK_ADDRESSABLE java_mark_addressable
228 #undef LANG_HOOKS_EXPAND_EXPR
229 #define LANG_HOOKS_EXPAND_EXPR java_expand_expr
230 #undef LANG_HOOKS_TRUTHVALUE_CONVERSION
231 #define LANG_HOOKS_TRUTHVALUE_CONVERSION java_truthvalue_conversion
232 #undef LANG_HOOKS_DUP_LANG_SPECIFIC_DECL
233 #define LANG_HOOKS_DUP_LANG_SPECIFIC_DECL java_dup_lang_specific_decl
234 #undef LANG_HOOKS_DECL_PRINTABLE_NAME
235 #define LANG_HOOKS_DECL_PRINTABLE_NAME lang_printable_name
236 #undef LANG_HOOKS_PRINT_ERROR_FUNCTION
237 #define LANG_HOOKS_PRINT_ERROR_FUNCTION java_print_error_function
238 #undef LANG_HOOKS_CAN_USE_BIT_FIELDS_P
239 #define LANG_HOOKS_CAN_USE_BIT_FIELDS_P java_can_use_bit_fields_p
241 #undef LANG_HOOKS_TYPE_FOR_MODE
242 #define LANG_HOOKS_TYPE_FOR_MODE java_type_for_mode
243 #undef LANG_HOOKS_TYPE_FOR_SIZE
244 #define LANG_HOOKS_TYPE_FOR_SIZE java_type_for_size
245 #undef LANG_HOOKS_SIGNED_TYPE
246 #define LANG_HOOKS_SIGNED_TYPE java_signed_type
247 #undef LANG_HOOKS_UNSIGNED_TYPE
248 #define LANG_HOOKS_UNSIGNED_TYPE java_unsigned_type
249 #undef LANG_HOOKS_SIGNED_OR_UNSIGNED_TYPE
250 #define LANG_HOOKS_SIGNED_OR_UNSIGNED_TYPE java_signed_or_unsigned_type
252 #undef LANG_HOOKS_TREE_INLINING_WALK_SUBTREES
253 #define LANG_HOOKS_TREE_INLINING_WALK_SUBTREES java_tree_inlining_walk_subtrees
255 #undef LANG_HOOKS_TREE_INLINING_ESTIMATE_NUM_INSNS
256 #define LANG_HOOKS_TREE_INLINING_ESTIMATE_NUM_INSNS java_estimate_num_insns
258 #undef LANG_HOOKS_TREE_INLINING_START_INLINING
259 #define LANG_HOOKS_TREE_INLINING_START_INLINING java_start_inlining
261 #undef LANG_HOOKS_TREE_DUMP_DUMP_TREE_FN
262 #define LANG_HOOKS_TREE_DUMP_DUMP_TREE_FN java_dump_tree
264 #undef LANG_HOOKS_DECL_OK_FOR_SIBCALL
265 #define LANG_HOOKS_DECL_OK_FOR_SIBCALL java_decl_ok_for_sibcall
267 #undef LANG_HOOKS_GET_CALLEE_FNDECL
268 #define LANG_HOOKS_GET_CALLEE_FNDECL java_get_callee_fndecl
270 #undef LANG_HOOKS_CALLGRAPH_EXPAND_FUNCTION
271 #define LANG_HOOKS_CALLGRAPH_EXPAND_FUNCTION java_expand_body
273 /* Each front end provides its own. */
274 const struct lang_hooks lang_hooks = LANG_HOOKS_INITIALIZER;
277 * process java-specific compiler command-line options
278 * return 0, but do not complain if the option is not recognized.
281 java_handle_option (size_t scode, const char *arg, int value)
283 enum opt_code code = (enum opt_code) scode;
291 jcf_path_include_arg (arg);
295 jcf_dependency_init (1);
296 dependency_tracking |= DEPEND_ENABLE;
300 jcf_dependency_init (1);
301 dependency_tracking |= DEPEND_SET_FILE | DEPEND_ENABLE;
305 jcf_dependency_set_dep_file (arg);
306 dependency_tracking |= DEPEND_FILE_ALREADY_SET;
310 jcf_dependency_init (0);
311 dependency_tracking |= DEPEND_ENABLE;
315 jcf_dependency_init (0);
316 dependency_tracking |= DEPEND_SET_FILE | DEPEND_ENABLE;
320 jcf_dependency_print_dummies ();
324 jcf_dependency_set_target (arg);
325 dependency_tracking |= DEPEND_TARGET_SET;
330 flag_redundant = value;
331 flag_extraneous_semicolon = value;
332 /* When -Wall given, enable -Wunused. We do this because the C
333 compiler does it, and people expect it. */
337 case OPT_Wdeprecated:
338 flag_deprecated = value;
341 case OPT_Wextraneous_semicolon:
342 flag_extraneous_semicolon = value;
345 case OPT_Wout_of_date:
349 case OPT_Wredundant_modifiers:
350 flag_redundant = value;
357 case OPT_fassume_compiled_:
358 add_assume_compiled (arg, !value);
361 case OPT_fassume_compiled:
362 add_assume_compiled ("", !value);
365 case OPT_fbootclasspath_:
366 jcf_path_bootclasspath_arg (arg);
369 case OPT_fcheck_references:
370 flag_check_references = value;
373 case OPT_fclasspath_:
374 case OPT_fCLASSPATH_:
375 jcf_path_classpath_arg (arg);
378 case OPT_fcompile_resource_:
383 if (!dump_switch_p (arg))
387 case OPT_femit_class_file:
388 case OPT_femit_class_files:
389 flag_emit_class_files = value;
393 current_encoding = arg;
397 jcf_path_extdirs_arg (arg);
400 case OPT_ffilelist_file:
401 flag_filelist_file = value;
404 case OPT_fforce_classes_archive_check:
405 flag_force_classes_archive_check = value;
408 case OPT_fhash_synchronization:
409 flag_hash_synchronization = value;
412 case OPT_findirect_dispatch:
413 flag_indirect_dispatch = value;
416 case OPT_finline_functions:
417 flag_inline_functions = value;
418 flag_really_inline = value;
425 case OPT_foptimize_static_class_initialization:
426 flag_optimize_sci = value;
429 case OPT_foutput_class_dir_:
430 jcf_write_base_directory = arg;
433 case OPT_fstore_check:
434 flag_store_check = value;
437 case OPT_fuse_boehm_gc:
438 flag_use_boehm_gc = value;
441 case OPT_fuse_divide_subroutine:
442 flag_use_divide_subroutine = value;
453 /* Global open file. */
460 extern int flag_minimal_debug;
461 flag_minimal_debug = 0;
464 if (flag_inline_functions)
465 flag_inline_trees = 1;
467 /* Force minimum function alignment if g++ uses the least significant
468 bit of function pointers to store the virtual bit. This is required
469 to keep vtables compatible. */
470 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
471 && force_align_functions_log < 1)
472 force_align_functions_log = 1;
474 jcf_path_seal (v_flag);
476 java_init_decl_processing ();
478 using_eh_for_cleanups ();
486 jcf_dependency_write ();
489 /* Buffer used by lang_printable_name. */
490 static char *decl_buf = NULL;
492 /* Allocated size of decl_buf. */
493 static int decl_buflen = 0;
495 /* Length of used part of decl_buf; position for next character. */
496 static int decl_bufpos = 0;
498 /* Append the string STR to decl_buf.
499 It length is given by LEN; -1 means the string is nul-terminated. */
502 put_decl_string (const char *str, int len)
506 if (decl_bufpos + len >= decl_buflen)
508 if (decl_buf == NULL)
510 decl_buflen = len + 100;
511 decl_buf = xmalloc (decl_buflen);
516 decl_buf = xrealloc (decl_buf, decl_buflen);
519 strcpy (decl_buf + decl_bufpos, str);
523 /* Append to decl_buf a printable name for NODE. */
526 put_decl_node (tree node)
529 if (TREE_CODE (node) == POINTER_TYPE)
531 node = TREE_TYPE (node);
534 if (TREE_CODE_CLASS (TREE_CODE (node)) == 'd'
535 && DECL_NAME (node) != NULL_TREE)
537 if (TREE_CODE (node) == FUNCTION_DECL)
539 /* We want to print the type the DECL belongs to. We don't do
540 that when we handle constructors. */
541 if (! DECL_CONSTRUCTOR_P (node)
542 && ! DECL_ARTIFICIAL (node) && DECL_CONTEXT (node))
544 put_decl_node (TYPE_NAME (DECL_CONTEXT (node)));
545 put_decl_string (".", 1);
547 if (! DECL_CONSTRUCTOR_P (node))
548 put_decl_node (DECL_NAME (node));
549 if (TREE_TYPE (node) != NULL_TREE)
552 tree args = TYPE_ARG_TYPES (TREE_TYPE (node));
553 if (TREE_CODE (TREE_TYPE (node)) == METHOD_TYPE)
554 args = TREE_CHAIN (args);
555 put_decl_string ("(", 1);
556 for ( ; args != end_params_node; args = TREE_CHAIN (args), i++)
559 put_decl_string (",", 1);
560 put_decl_node (TREE_VALUE (args));
562 put_decl_string (")", 1);
566 put_decl_node (DECL_NAME (node));
568 else if (TREE_CODE_CLASS (TREE_CODE (node)) == 't'
569 && TYPE_NAME (node) != NULL_TREE)
571 if (TREE_CODE (node) == RECORD_TYPE && TYPE_ARRAY_P (node))
573 put_decl_node (TYPE_ARRAY_ELEMENT (node));
574 put_decl_string("[]", 2);
576 else if (node == promoted_byte_type_node)
577 put_decl_string ("byte", 4);
578 else if (node == promoted_short_type_node)
579 put_decl_string ("short", 5);
580 else if (node == promoted_char_type_node)
581 put_decl_string ("char", 4);
582 else if (node == promoted_boolean_type_node)
583 put_decl_string ("boolean", 7);
584 else if (node == void_type_node && was_pointer)
585 put_decl_string ("null", 4);
587 put_decl_node (TYPE_NAME (node));
589 else if (TREE_CODE (node) == IDENTIFIER_NODE)
590 put_decl_string (IDENTIFIER_POINTER (node), IDENTIFIER_LENGTH (node));
592 put_decl_string ("<unknown>", -1);
595 /* Return a user-friendly name for DECL.
596 The resulting string is only valid until the next call.
597 The value of the hook decl_printable_name is this function,
598 which is also called directly by java_print_error_function. */
601 lang_printable_name (tree decl, int v __attribute__ ((__unused__)))
604 put_decl_node (decl);
605 put_decl_string ("", 1);
609 /* Does the same thing that lang_printable_name, but add a leading
610 space to the DECL name string -- With Leading Space. */
613 lang_printable_name_wls (tree decl, int v __attribute__ ((__unused__)))
616 put_decl_node (decl);
617 put_decl_string ("", 1);
622 /* Print on stderr the current class and method context. This function
623 is the value of the hook print_error_function. */
625 static GTY(()) tree last_error_function_context;
626 static GTY(()) tree last_error_function;
628 java_print_error_function (diagnostic_context *context ATTRIBUTE_UNUSED,
631 /* Don't print error messages with bogus function prototypes. */
632 if (inhibit_error_function_printing)
635 if (current_function_decl != NULL
636 && DECL_CONTEXT (current_function_decl) != last_error_function_context)
639 fprintf (stderr, "%s: ", file);
641 last_error_function_context = DECL_CONTEXT (current_function_decl);
642 fprintf (stderr, "In class `%s':\n",
643 lang_printable_name (last_error_function_context, 0));
645 if (last_error_function != current_function_decl)
648 fprintf (stderr, "%s: ", file);
650 if (current_function_decl == NULL)
651 fprintf (stderr, "At top level:\n");
654 const char *name = lang_printable_name (current_function_decl, 2);
655 fprintf (stderr, "In %s `%s':\n",
656 (DECL_CONSTRUCTOR_P (current_function_decl) ? "constructor"
661 last_error_function = current_function_decl;
666 /* Called to install the PRINT_ERROR_FUNCTION hook differently
667 according to LEVEL. LEVEL is 1 during early parsing, when function
668 prototypes aren't fully resolved. java_print_error_function is set
669 so it doesn't print incomplete function prototypes. When LEVEL is
670 2, function prototypes are fully resolved and can be printed when
673 void lang_init_source (int level)
675 inhibit_error_function_printing = (level == 1);
679 java_init_options (unsigned int argc ATTRIBUTE_UNUSED,
680 const char **argv ATTRIBUTE_UNUSED)
682 flag_bounds_check = 1;
684 flag_non_call_exceptions = 1;
686 /* In Java floating point operations never trap. */
687 flag_trapping_math = 0;
689 /* In Java arithmetic overflow always wraps around. */
692 /* Java requires left-to-right evaluation of subexpressions. */
693 flag_evaluation_order = 1;
701 java_can_use_bit_fields_p (void)
703 /* The bit-field optimizations cause problems when generating class
705 return flag_emit_class_files ? false : true;
708 /* Post-switch processing. */
710 java_post_options (const char **pfilename)
712 const char *filename = *pfilename;
714 /* Use tree inlining if possible. Function instrumentation is only
715 done in the RTL level, so we disable tree inlining. */
716 if (! flag_instrument_function_entry_exit)
720 if (flag_inline_functions)
722 flag_inline_trees = 2;
723 flag_inline_functions = 0;
727 /* Open input file. */
729 if (filename == 0 || !strcmp (filename, "-"))
734 if (dependency_tracking)
735 error ("can't do dependency tracking with input from stdin");
739 if (dependency_tracking)
743 /* If the target is set and the output filename is set, then
744 there's no processing to do here. Otherwise we must
745 compute one or the other. */
746 if (! ((dependency_tracking & DEPEND_TARGET_SET)
747 && (dependency_tracking & DEPEND_FILE_ALREADY_SET)))
749 dot = strrchr (filename, '.');
751 error ("couldn't determine target name for dependency tracking");
754 char *buf = xmalloc (dot - filename +
755 3 + sizeof (TARGET_OBJECT_SUFFIX));
756 strncpy (buf, filename, dot - filename);
758 /* If emitting class files, we might have multiple
759 targets. The class generation code takes care of
760 registering them. Otherwise we compute the
762 if ((dependency_tracking & DEPEND_TARGET_SET))
764 else if (flag_emit_class_files)
765 jcf_dependency_set_target (NULL);
768 strcpy (buf + (dot - filename), TARGET_OBJECT_SUFFIX);
769 jcf_dependency_set_target (buf);
772 if ((dependency_tracking & DEPEND_FILE_ALREADY_SET))
774 else if ((dependency_tracking & DEPEND_SET_FILE))
776 strcpy (buf + (dot - filename), ".d");
777 jcf_dependency_set_dep_file (buf);
780 jcf_dependency_set_dep_file ("-");
788 /* Initialize the compiler back end. */
792 /* Return either DECL or its known constant value (if it has one). */
795 decl_constant_value (tree decl)
797 if (/* Don't change a variable array bound or initial value to a constant
798 in a place where a variable is invalid. */
799 current_function_decl != 0
800 && ! TREE_THIS_VOLATILE (decl)
801 && TREE_READONLY (decl)
802 && DECL_INITIAL (decl) != 0
803 && TREE_CODE (DECL_INITIAL (decl)) != ERROR_MARK
804 /* This is invalid if initial value is not constant.
805 If it has either a function call, a memory reference,
806 or a variable, then re-evaluating it could give different results. */
807 && TREE_CONSTANT (DECL_INITIAL (decl))
808 /* Check for cases where this is sub-optimal, even though valid. */
809 && TREE_CODE (DECL_INITIAL (decl)) != CONSTRUCTOR)
810 return DECL_INITIAL (decl);
814 /* Walk the language specific tree nodes during inlining. */
817 java_tree_inlining_walk_subtrees (tree *tp ATTRIBUTE_UNUSED,
818 int *subtrees ATTRIBUTE_UNUSED,
819 walk_tree_fn func ATTRIBUTE_UNUSED,
820 void *data ATTRIBUTE_UNUSED,
821 void *htab ATTRIBUTE_UNUSED)
826 #define WALK_SUBTREE(NODE) \
829 result = walk_tree (&(NODE), func, data, htab); \
839 code = TREE_CODE (t);
843 WALK_SUBTREE (BLOCK_EXPR_BODY (t));
853 /* Called from unsafe_for_reeval. */
855 java_unsafe_for_reeval (tree t)
857 switch (TREE_CODE (t))
860 /* Our expander tries to expand the variables twice. Boom. */
861 if (BLOCK_EXPR_DECLS (t) != NULL)
863 return unsafe_for_reeval (BLOCK_EXPR_BODY (t));
872 /* Every call to a static constructor has an associated boolean
873 variable which is in the outermost scope of the calling method.
874 This variable is used to avoid multiple calls to the static
875 constructor for each class.
877 It looks something like this:
881 boolean dummy = OtherClass.is_initialized;
886 OtherClass.initialize();
888 ... use OtherClass.data ...
891 Each of these boolean variables has an entry in the
892 DECL_FUNCTION_INIT_TEST_TABLE of a method. When inlining a method
893 we must merge the DECL_FUNCTION_INIT_TEST_TABLE from the function
894 being inlined and create the boolean variables in the outermost
895 scope of the method being inlined into. */
897 /* Create a mapping from a boolean variable in a method being inlined
898 to one in the scope of the method being inlined into. */
901 merge_init_test_initialization (void **entry, void *x)
903 struct treetreehash_entry *ite = (struct treetreehash_entry *) *entry;
904 splay_tree decl_map = (splay_tree)x;
906 tree *init_test_decl;
908 /* See if we have remapped this declaration. If we haven't there's
909 a bug in the inliner. */
910 n = splay_tree_lookup (decl_map, (splay_tree_key) ite->value);
914 /* Create a new entry for the class and its remapped boolean
915 variable. If we already have a mapping for this class we've
916 already initialized it, so don't overwrite the value. */
917 init_test_decl = java_treetreehash_new
918 (DECL_FUNCTION_INIT_TEST_TABLE (current_function_decl), ite->key);
919 if (!*init_test_decl)
920 *init_test_decl = (tree)n->value;
922 /* This fixes a weird case.
924 The front end assumes that once we have called a method that
925 initializes some class, we can assume the class is initialized. It
926 does this by setting the DECL_INITIAL of the init_test_decl for that
927 class, and no initializations are emitted for that class.
929 However, what if the method that is suppoed to do the initialization
930 is itself inlined in the caller? When expanding the called method
931 we'll assume that the class initalization has already been done,
932 because the DECL_INITIAL of the init_test_decl is set.
934 To fix this we remove the DECL_INITIAL (in the caller scope) of all
935 the init_test_decls corresponding to classes initialized by the
936 inlined method. This makes the caller no longer assume that the
937 method being inlined does any class initializations. */
938 DECL_INITIAL (*init_test_decl) = NULL;
943 /* Merge the DECL_FUNCTION_INIT_TEST_TABLE from the function we're
947 java_inlining_merge_static_initializers (tree fn, void *decl_map)
950 (DECL_FUNCTION_INIT_TEST_TABLE (fn),
951 merge_init_test_initialization, decl_map);
954 /* Lookup a DECL_FUNCTION_INIT_TEST_TABLE entry in the method we're
955 inlining into. If we already have a corresponding entry in that
956 class we don't need to create another one, so we create a mapping
957 from the variable in the inlined class to the corresponding
961 inline_init_test_initialization (void **entry, void *x)
963 struct treetreehash_entry *ite = (struct treetreehash_entry *) *entry;
964 splay_tree decl_map = (splay_tree)x;
966 tree h = java_treetreehash_find
967 (DECL_FUNCTION_INIT_TEST_TABLE (current_function_decl), ite->key);
971 splay_tree_insert (decl_map,
972 (splay_tree_key) ite->value,
973 (splay_tree_value) h);
978 /* Look up the boolean variables in the DECL_FUNCTION_INIT_TEST_TABLE
979 of a method being inlined. For each hone, if we already have a
980 variable associated with the same class in the method being inlined
981 into, create a new mapping for it. */
984 java_inlining_map_static_initializers (tree fn, void *decl_map)
987 (DECL_FUNCTION_INIT_TEST_TABLE (fn),
988 inline_init_test_initialization, decl_map);
991 /* Avoid voluminous output for deep recursion of compound exprs. */
994 dump_compound_expr (dump_info_p di, tree t)
1000 switch (TREE_CODE (TREE_OPERAND (t, i)))
1003 dump_compound_expr (di, TREE_OPERAND (t, i));
1006 case EXPR_WITH_FILE_LOCATION:
1008 tree wfl_node = EXPR_WFL_NODE (TREE_OPERAND (t, i));
1009 dump_child ("expr", wfl_node);
1014 dump_child ("expr", TREE_OPERAND (t, i));
1020 java_dump_tree (void *dump_info, tree t)
1022 enum tree_code code;
1023 dump_info_p di = (dump_info_p) dump_info;
1025 /* Figure out what kind of node this is. */
1026 code = TREE_CODE (t);
1031 dump_child ("args", DECL_ARGUMENTS (t));
1032 if (DECL_EXTERNAL (t))
1033 dump_string (di, "undefined");
1034 if (TREE_PUBLIC (t))
1035 dump_string (di, "extern");
1037 dump_string (di, "static");
1038 if (DECL_LANG_SPECIFIC (t))
1039 dump_child ("body", DECL_FUNCTION_BODY (t));
1040 if (DECL_LANG_SPECIFIC (t) && !dump_flag (di, TDF_SLIM, t))
1041 dump_child ("inline body", DECL_SAVED_TREE (t));
1045 dump_child ("expr", TREE_OPERAND (t, 0));
1049 dump_child ("goto", TREE_OPERAND (t, 0));
1053 dump_child ("label", TREE_OPERAND (t, 0));
1056 case LABELED_BLOCK_EXPR:
1057 dump_child ("label", TREE_OPERAND (t, 0));
1058 dump_child ("block", TREE_OPERAND (t, 1));
1061 case EXIT_BLOCK_EXPR:
1062 dump_child ("block", TREE_OPERAND (t, 0));
1063 dump_child ("val", TREE_OPERAND (t, 1));
1067 if (BLOCK_EXPR_BODY (t))
1069 tree local = BLOCK_VARS (t);
1072 tree next = TREE_CHAIN (local);
1073 dump_child ("var", local);
1078 tree block = BLOCK_EXPR_BODY (t);
1079 dump_child ("body", block);
1080 block = TREE_CHAIN (block);
1086 if (!dump_flag (di, TDF_SLIM, t))
1088 dump_compound_expr (di, t);
1097 /* Java calls can't, in general, be sibcalls because we need an
1098 accurate stack trace in order to guarantee correct operation of
1099 methods such as Class.forName(String) and
1100 SecurityManager.getClassContext(). */
1103 java_decl_ok_for_sibcall (tree decl)
1105 return decl != NULL && DECL_CONTEXT (decl) == current_class;
1108 /* Used by estimate_num_insns. Estimate number of instructions seen
1109 by given statement. */
1111 java_estimate_num_insns_1 (tree *tp, int *walk_subtrees, void *data)
1116 if (TYPE_P (x) || DECL_P (x))
1121 /* Assume that constants and references counts nothing. These should
1122 be majorized by amount of operations among them we count later
1123 and are common target of CSE and similar optimizations. */
1124 if (TREE_CODE_CLASS (TREE_CODE (x)) == 'c'
1125 || TREE_CODE_CLASS (TREE_CODE (x)) == 'r')
1127 switch (TREE_CODE (x))
1129 /* Recognize assignments of large structures and constructors of
1134 int size = int_size_in_bytes (TREE_TYPE (x));
1136 if (!size || size > MOVE_MAX_PIECES)
1139 *count += 2 * (size + MOVE_MAX - 1) / MOVE_MAX;
1143 /* Few special cases of expensive operations. This is usefull
1144 to avoid inlining on functions having too many of these. */
1145 case TRUNC_DIV_EXPR:
1147 case FLOOR_DIV_EXPR:
1148 case ROUND_DIV_EXPR:
1149 case TRUNC_MOD_EXPR:
1151 case FLOOR_MOD_EXPR:
1152 case ROUND_MOD_EXPR:
1156 case NEW_ARRAY_EXPR:
1157 case NEW_ANONYMOUS_ARRAY_EXPR:
1158 case NEW_CLASS_EXPR:
1161 /* Various containers that will produce no code themselves. */
1168 case IDENTIFIER_NODE:
1169 case PLACEHOLDER_EXPR:
1170 case WITH_CLEANUP_EXPR:
1171 case CLEANUP_POINT_EXPR:
1173 case VIEW_CONVERT_EXPR:
1179 case TRY_CATCH_EXPR:
1180 case TRY_FINALLY_EXPR:
1183 case LABELED_BLOCK_EXPR:
1184 case EXIT_BLOCK_EXPR:
1185 case EXPR_WITH_FILE_LOCATION:
1186 case UNARY_PLUS_EXPR:
1201 /* Estimate number of instructions that will be created by expanding the body. */
1203 java_estimate_num_insns (tree decl)
1206 walk_tree_without_duplicates (&DECL_SAVED_TREE (decl),
1207 java_estimate_num_insns_1, &num);
1211 /* Start inlining fn. Called by the tree inliner via
1212 lang_hooks.tree_inlining.cannot_inline_tree_fn. */
1215 java_start_inlining (tree fn)
1217 /* A java function's body doesn't have a BLOCK structure suitable
1218 for debug output until it is expanded. Prevent inlining functions
1219 that are not yet expanded. */
1220 return TREE_ASM_WRITTEN (fn) ? 1 : 0;
1223 /* Given a call_expr, try to figure out what its target might be. In
1224 the case of an indirection via the atable, search for the decl. If
1225 the decl is external, we return NULL. If we don't, the optimizer
1226 will replace the indirection with a direct call, which undoes the
1227 purpose of the atable indirection. */
1229 java_get_callee_fndecl (tree call_expr)
1231 tree method, table, element;
1233 HOST_WIDE_INT index;
1235 if (TREE_CODE (call_expr) != CALL_EXPR)
1237 method = TREE_OPERAND (call_expr, 0);
1238 STRIP_NOPS (method);
1239 if (TREE_CODE (method) != ARRAY_REF)
1241 table = TREE_OPERAND (method, 0);
1242 if (table != atable_decl)
1244 index = TREE_INT_CST_LOW (TREE_OPERAND (method, 1));
1246 /* FIXME: Replace this for loop with a hash table lookup. */
1247 for (element = atable_methods; element; element = TREE_CHAIN (element))
1251 tree purpose = TREE_PURPOSE (element);
1252 if (TREE_CODE (purpose) == FUNCTION_DECL
1253 && ! DECL_EXTERNAL (purpose))
1264 #include "gt-java-lang.h"