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);
72 #ifndef TARGET_OBJECT_SUFFIX
73 # define TARGET_OBJECT_SUFFIX ".o"
76 /* Table indexed by tree code giving a string containing a character
77 classifying the tree code. Possibilities are
78 t, d, s, c, r, <, 1 and 2. See java/java-tree.def for details. */
80 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) TYPE,
82 const char tree_code_type[] = {
85 #include "java-tree.def"
89 /* Table indexed by tree code giving number of expression
90 operands beyond the fixed part of the node structure.
91 Not used for types or decls. */
93 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) LENGTH,
95 const unsigned char tree_code_length[] = {
98 #include "java-tree.def"
102 /* Names of tree components.
103 Used for printing out the tree and error messages. */
104 #define DEFTREECODE(SYM, NAME, TYPE, LEN) NAME,
106 const char *const tree_code_name[] = {
109 #include "java-tree.def"
113 /* Used to avoid printing error messages with bogus function
114 prototypes. Starts out false. */
115 static bool inhibit_error_function_printing;
117 int compiling_from_source;
119 const char *resource_name;
121 int flag_emit_class_files = 0;
123 /* Nonzero if input file is a file with a list of filenames to compile. */
125 int flag_filelist_file = 0;
127 /* When nonzero, we emit xref strings. Values of the flag for xref
128 backends are defined in xref_flag_table, xref.c. */
130 int flag_emit_xref = 0;
132 /* When nonzero, -Wall was turned on. */
135 /* When nonzero, check for redundant modifier uses. */
136 int flag_redundant = 0;
138 /* When nonzero, call a library routine to do integer divisions. */
139 int flag_use_divide_subroutine = 1;
141 /* When nonzero, generate code for the Boehm GC. */
142 int flag_use_boehm_gc = 0;
144 /* When nonzero, assume the runtime uses a hash table to map an
145 object to its synchronization structure. */
146 int flag_hash_synchronization;
148 /* When nonzero, permit the use of the assert keyword. */
151 /* When nonzero, assume all native functions are implemented with
155 /* When nonzero, warn when source file is newer than matching class
159 /* When nonzero, generate checks for references to NULL. */
160 int flag_check_references = 0;
162 /* The encoding of the source file. */
163 const char *current_encoding = NULL;
165 /* When nonzero, report the now deprecated empty statements. */
166 int flag_extraneous_semicolon;
168 /* When nonzero, report use of deprecated classes, methods, or fields. */
169 int flag_deprecated = 1;
171 /* When nonzero, always check for a non gcj generated classes archive. */
172 int flag_force_classes_archive_check;
174 /* When zero, don't optimize static class initialization. This flag shouldn't
175 be tested alone, use STATIC_CLASS_INITIALIZATION_OPTIMIZATION_P instead. */
176 int flag_optimize_sci = 1;
178 /* When nonzero, use offset tables for virtual method calls
179 in order to improve binary compatibility. */
180 int flag_indirect_dispatch = 0;
182 /* When zero, don't generate runtime array store checks. */
183 int flag_store_check = 1;
185 /* When nonzero, print extra version information. */
186 static int v_flag = 0;
188 /* Set nonzero if the user specified -finline-functions on the command
190 int flag_really_inline = 0;
194 /* Variable controlling how dependency tracking is enabled in
196 static int dependency_tracking = 0;
198 /* Flag values for DEPENDENCY_TRACKING. */
199 #define DEPEND_SET_FILE 1
200 #define DEPEND_ENABLE 2
201 #define DEPEND_TARGET_SET 4
202 #define DEPEND_FILE_ALREADY_SET 8
204 struct language_function GTY(())
209 #undef LANG_HOOKS_NAME
210 #define LANG_HOOKS_NAME "GNU Java"
211 #undef LANG_HOOKS_INIT
212 #define LANG_HOOKS_INIT java_init
213 #undef LANG_HOOKS_FINISH
214 #define LANG_HOOKS_FINISH java_finish
215 #undef LANG_HOOKS_INIT_OPTIONS
216 #define LANG_HOOKS_INIT_OPTIONS java_init_options
217 #undef LANG_HOOKS_HANDLE_OPTION
218 #define LANG_HOOKS_HANDLE_OPTION java_handle_option
219 #undef LANG_HOOKS_POST_OPTIONS
220 #define LANG_HOOKS_POST_OPTIONS java_post_options
221 #undef LANG_HOOKS_PARSE_FILE
222 #define LANG_HOOKS_PARSE_FILE java_parse_file
223 #undef LANG_HOOKS_UNSAFE_FOR_REEVAL
224 #define LANG_HOOKS_UNSAFE_FOR_REEVAL java_unsafe_for_reeval
225 #undef LANG_HOOKS_MARK_ADDRESSABLE
226 #define LANG_HOOKS_MARK_ADDRESSABLE java_mark_addressable
227 #undef LANG_HOOKS_EXPAND_EXPR
228 #define LANG_HOOKS_EXPAND_EXPR java_expand_expr
229 #undef LANG_HOOKS_TRUTHVALUE_CONVERSION
230 #define LANG_HOOKS_TRUTHVALUE_CONVERSION java_truthvalue_conversion
231 #undef LANG_HOOKS_DUP_LANG_SPECIFIC_DECL
232 #define LANG_HOOKS_DUP_LANG_SPECIFIC_DECL java_dup_lang_specific_decl
233 #undef LANG_HOOKS_DECL_PRINTABLE_NAME
234 #define LANG_HOOKS_DECL_PRINTABLE_NAME lang_printable_name
235 #undef LANG_HOOKS_PRINT_ERROR_FUNCTION
236 #define LANG_HOOKS_PRINT_ERROR_FUNCTION java_print_error_function
237 #undef LANG_HOOKS_CAN_USE_BIT_FIELDS_P
238 #define LANG_HOOKS_CAN_USE_BIT_FIELDS_P java_can_use_bit_fields_p
240 #undef LANG_HOOKS_TYPE_FOR_MODE
241 #define LANG_HOOKS_TYPE_FOR_MODE java_type_for_mode
242 #undef LANG_HOOKS_TYPE_FOR_SIZE
243 #define LANG_HOOKS_TYPE_FOR_SIZE java_type_for_size
244 #undef LANG_HOOKS_SIGNED_TYPE
245 #define LANG_HOOKS_SIGNED_TYPE java_signed_type
246 #undef LANG_HOOKS_UNSIGNED_TYPE
247 #define LANG_HOOKS_UNSIGNED_TYPE java_unsigned_type
248 #undef LANG_HOOKS_SIGNED_OR_UNSIGNED_TYPE
249 #define LANG_HOOKS_SIGNED_OR_UNSIGNED_TYPE java_signed_or_unsigned_type
251 #undef LANG_HOOKS_TREE_INLINING_WALK_SUBTREES
252 #define LANG_HOOKS_TREE_INLINING_WALK_SUBTREES java_tree_inlining_walk_subtrees
254 #undef LANG_HOOKS_TREE_INLINING_ESTIMATE_NUM_INSNS
255 #define LANG_HOOKS_TREE_INLINING_ESTIMATE_NUM_INSNS java_estimate_num_insns
257 #undef LANG_HOOKS_TREE_INLINING_START_INLINING
258 #define LANG_HOOKS_TREE_INLINING_START_INLINING java_start_inlining
260 #undef LANG_HOOKS_TREE_DUMP_DUMP_TREE_FN
261 #define LANG_HOOKS_TREE_DUMP_DUMP_TREE_FN java_dump_tree
263 #undef LANG_HOOKS_DECL_OK_FOR_SIBCALL
264 #define LANG_HOOKS_DECL_OK_FOR_SIBCALL java_decl_ok_for_sibcall
266 #undef LANG_HOOKS_CALLGRAPH_EXPAND_FUNCTION
267 #define LANG_HOOKS_CALLGRAPH_EXPAND_FUNCTION java_expand_body
269 /* Each front end provides its own. */
270 const struct lang_hooks lang_hooks = LANG_HOOKS_INITIALIZER;
273 * process java-specific compiler command-line options
274 * return 0, but do not complain if the option is not recognized.
277 java_handle_option (size_t scode, const char *arg, int value)
279 enum opt_code code = (enum opt_code) scode;
287 jcf_path_include_arg (arg);
291 jcf_dependency_init (1);
292 dependency_tracking |= DEPEND_ENABLE;
296 jcf_dependency_init (1);
297 dependency_tracking |= DEPEND_SET_FILE | DEPEND_ENABLE;
301 jcf_dependency_set_dep_file (arg);
302 dependency_tracking |= DEPEND_FILE_ALREADY_SET;
306 jcf_dependency_init (0);
307 dependency_tracking |= DEPEND_ENABLE;
311 jcf_dependency_init (0);
312 dependency_tracking |= DEPEND_SET_FILE | DEPEND_ENABLE;
316 jcf_dependency_print_dummies ();
320 jcf_dependency_set_target (arg);
321 dependency_tracking |= DEPEND_TARGET_SET;
326 flag_redundant = value;
327 flag_extraneous_semicolon = value;
328 /* When -Wall given, enable -Wunused. We do this because the C
329 compiler does it, and people expect it. */
333 case OPT_Wdeprecated:
334 flag_deprecated = value;
337 case OPT_Wextraneous_semicolon:
338 flag_extraneous_semicolon = value;
341 case OPT_Wout_of_date:
345 case OPT_Wredundant_modifiers:
346 flag_redundant = value;
353 case OPT_fassume_compiled_:
354 add_assume_compiled (arg, !value);
357 case OPT_fassume_compiled:
358 add_assume_compiled ("", !value);
361 case OPT_fbootclasspath_:
362 jcf_path_bootclasspath_arg (arg);
365 case OPT_fcheck_references:
366 flag_check_references = value;
369 case OPT_fclasspath_:
370 case OPT_fCLASSPATH_:
371 jcf_path_classpath_arg (arg);
374 case OPT_fcompile_resource_:
379 if (!dump_switch_p (arg))
383 case OPT_femit_class_file:
384 case OPT_femit_class_files:
385 flag_emit_class_files = value;
389 current_encoding = arg;
393 jcf_path_extdirs_arg (arg);
396 case OPT_ffilelist_file:
397 flag_filelist_file = value;
400 case OPT_fforce_classes_archive_check:
401 flag_force_classes_archive_check = value;
404 case OPT_fhash_synchronization:
405 flag_hash_synchronization = value;
408 case OPT_findirect_dispatch:
409 flag_indirect_dispatch = value;
412 case OPT_finline_functions:
413 flag_inline_functions = value;
414 flag_really_inline = value;
421 case OPT_foptimize_static_class_initialization:
422 flag_optimize_sci = value;
425 case OPT_foutput_class_dir_:
426 jcf_write_base_directory = arg;
429 case OPT_fstore_check:
430 flag_store_check = value;
433 case OPT_fuse_boehm_gc:
434 flag_use_boehm_gc = value;
437 case OPT_fuse_divide_subroutine:
438 flag_use_divide_subroutine = value;
449 /* Global open file. */
456 extern int flag_minimal_debug;
457 flag_minimal_debug = 0;
460 if (flag_inline_functions)
461 flag_inline_trees = 1;
463 /* Force minimum function alignment if g++ uses the least significant
464 bit of function pointers to store the virtual bit. This is required
465 to keep vtables compatible. */
466 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
467 && force_align_functions_log < 1)
468 force_align_functions_log = 1;
470 jcf_path_seal (v_flag);
472 java_init_decl_processing ();
474 using_eh_for_cleanups ();
482 jcf_dependency_write ();
485 /* Buffer used by lang_printable_name. */
486 static char *decl_buf = NULL;
488 /* Allocated size of decl_buf. */
489 static int decl_buflen = 0;
491 /* Length of used part of decl_buf; position for next character. */
492 static int decl_bufpos = 0;
494 /* Append the string STR to decl_buf.
495 It length is given by LEN; -1 means the string is nul-terminated. */
498 put_decl_string (const char *str, int len)
502 if (decl_bufpos + len >= decl_buflen)
504 if (decl_buf == NULL)
506 decl_buflen = len + 100;
507 decl_buf = xmalloc (decl_buflen);
512 decl_buf = xrealloc (decl_buf, decl_buflen);
515 strcpy (decl_buf + decl_bufpos, str);
519 /* Append to decl_buf a printable name for NODE. */
522 put_decl_node (tree node)
525 if (TREE_CODE (node) == POINTER_TYPE)
527 node = TREE_TYPE (node);
530 if (TREE_CODE_CLASS (TREE_CODE (node)) == 'd'
531 && DECL_NAME (node) != NULL_TREE)
533 if (TREE_CODE (node) == FUNCTION_DECL)
535 /* We want to print the type the DECL belongs to. We don't do
536 that when we handle constructors. */
537 if (! DECL_CONSTRUCTOR_P (node)
538 && ! DECL_ARTIFICIAL (node) && DECL_CONTEXT (node))
540 put_decl_node (TYPE_NAME (DECL_CONTEXT (node)));
541 put_decl_string (".", 1);
543 if (! DECL_CONSTRUCTOR_P (node))
544 put_decl_node (DECL_NAME (node));
545 if (TREE_TYPE (node) != NULL_TREE)
548 tree args = TYPE_ARG_TYPES (TREE_TYPE (node));
549 if (TREE_CODE (TREE_TYPE (node)) == METHOD_TYPE)
550 args = TREE_CHAIN (args);
551 put_decl_string ("(", 1);
552 for ( ; args != end_params_node; args = TREE_CHAIN (args), i++)
555 put_decl_string (",", 1);
556 put_decl_node (TREE_VALUE (args));
558 put_decl_string (")", 1);
562 put_decl_node (DECL_NAME (node));
564 else if (TREE_CODE_CLASS (TREE_CODE (node)) == 't'
565 && TYPE_NAME (node) != NULL_TREE)
567 if (TREE_CODE (node) == RECORD_TYPE && TYPE_ARRAY_P (node))
569 put_decl_node (TYPE_ARRAY_ELEMENT (node));
570 put_decl_string("[]", 2);
572 else if (node == promoted_byte_type_node)
573 put_decl_string ("byte", 4);
574 else if (node == promoted_short_type_node)
575 put_decl_string ("short", 5);
576 else if (node == promoted_char_type_node)
577 put_decl_string ("char", 4);
578 else if (node == promoted_boolean_type_node)
579 put_decl_string ("boolean", 7);
580 else if (node == void_type_node && was_pointer)
581 put_decl_string ("null", 4);
583 put_decl_node (TYPE_NAME (node));
585 else if (TREE_CODE (node) == IDENTIFIER_NODE)
586 put_decl_string (IDENTIFIER_POINTER (node), IDENTIFIER_LENGTH (node));
588 put_decl_string ("<unknown>", -1);
591 /* Return a user-friendly name for DECL.
592 The resulting string is only valid until the next call.
593 The value of the hook decl_printable_name is this function,
594 which is also called directly by java_print_error_function. */
597 lang_printable_name (tree decl, int v __attribute__ ((__unused__)))
600 put_decl_node (decl);
601 put_decl_string ("", 1);
605 /* Does the same thing that lang_printable_name, but add a leading
606 space to the DECL name string -- With Leading Space. */
609 lang_printable_name_wls (tree decl, int v __attribute__ ((__unused__)))
612 put_decl_node (decl);
613 put_decl_string ("", 1);
618 /* Print on stderr the current class and method context. This function
619 is the value of the hook print_error_function. */
621 static GTY(()) tree last_error_function_context;
622 static GTY(()) tree last_error_function;
624 java_print_error_function (diagnostic_context *context ATTRIBUTE_UNUSED,
627 /* Don't print error messages with bogus function prototypes. */
628 if (inhibit_error_function_printing)
631 if (current_function_decl != NULL
632 && DECL_CONTEXT (current_function_decl) != last_error_function_context)
635 fprintf (stderr, "%s: ", file);
637 last_error_function_context = DECL_CONTEXT (current_function_decl);
638 fprintf (stderr, "In class `%s':\n",
639 lang_printable_name (last_error_function_context, 0));
641 if (last_error_function != current_function_decl)
644 fprintf (stderr, "%s: ", file);
646 if (current_function_decl == NULL)
647 fprintf (stderr, "At top level:\n");
650 const char *name = lang_printable_name (current_function_decl, 2);
651 fprintf (stderr, "In %s `%s':\n",
652 (DECL_CONSTRUCTOR_P (current_function_decl) ? "constructor"
657 last_error_function = current_function_decl;
662 /* Called to install the PRINT_ERROR_FUNCTION hook differently
663 according to LEVEL. LEVEL is 1 during early parsing, when function
664 prototypes aren't fully resolved. java_print_error_function is set
665 so it doesn't print incomplete function prototypes. When LEVEL is
666 2, function prototypes are fully resolved and can be printed when
669 void lang_init_source (int level)
671 inhibit_error_function_printing = (level == 1);
675 java_init_options (unsigned int argc ATTRIBUTE_UNUSED,
676 const char **argv ATTRIBUTE_UNUSED)
678 flag_bounds_check = 1;
680 flag_non_call_exceptions = 1;
682 /* In Java floating point operations never trap. */
683 flag_trapping_math = 0;
685 /* In Java arithmetic overflow always wraps around. */
688 /* Java requires left-to-right evaluation of subexpressions. */
689 flag_evaluation_order = 1;
697 java_can_use_bit_fields_p (void)
699 /* The bit-field optimizations cause problems when generating class
701 return flag_emit_class_files ? false : true;
704 /* Post-switch processing. */
706 java_post_options (const char **pfilename)
708 const char *filename = *pfilename;
710 /* Use tree inlining if possible. Function instrumentation is only
711 done in the RTL level, so we disable tree inlining. */
712 if (! flag_instrument_function_entry_exit)
716 if (flag_inline_functions)
718 flag_inline_trees = 2;
719 flag_inline_functions = 0;
723 /* Open input file. */
725 if (filename == 0 || !strcmp (filename, "-"))
730 if (dependency_tracking)
731 error ("can't do dependency tracking with input from stdin");
735 if (dependency_tracking)
739 /* If the target is set and the output filename is set, then
740 there's no processing to do here. Otherwise we must
741 compute one or the other. */
742 if (! ((dependency_tracking & DEPEND_TARGET_SET)
743 && (dependency_tracking & DEPEND_FILE_ALREADY_SET)))
745 dot = strrchr (filename, '.');
747 error ("couldn't determine target name for dependency tracking");
750 char *buf = xmalloc (dot - filename +
751 3 + sizeof (TARGET_OBJECT_SUFFIX));
752 strncpy (buf, filename, dot - filename);
754 /* If emitting class files, we might have multiple
755 targets. The class generation code takes care of
756 registering them. Otherwise we compute the
758 if ((dependency_tracking & DEPEND_TARGET_SET))
760 else if (flag_emit_class_files)
761 jcf_dependency_set_target (NULL);
764 strcpy (buf + (dot - filename), TARGET_OBJECT_SUFFIX);
765 jcf_dependency_set_target (buf);
768 if ((dependency_tracking & DEPEND_FILE_ALREADY_SET))
770 else if ((dependency_tracking & DEPEND_SET_FILE))
772 strcpy (buf + (dot - filename), ".d");
773 jcf_dependency_set_dep_file (buf);
776 jcf_dependency_set_dep_file ("-");
784 /* Initialize the compiler back end. */
788 /* Return either DECL or its known constant value (if it has one). */
791 decl_constant_value (tree decl)
793 if (/* Don't change a variable array bound or initial value to a constant
794 in a place where a variable is invalid. */
795 current_function_decl != 0
796 && ! TREE_THIS_VOLATILE (decl)
797 && TREE_READONLY (decl)
798 && DECL_INITIAL (decl) != 0
799 && TREE_CODE (DECL_INITIAL (decl)) != ERROR_MARK
800 /* This is invalid if initial value is not constant.
801 If it has either a function call, a memory reference,
802 or a variable, then re-evaluating it could give different results. */
803 && TREE_CONSTANT (DECL_INITIAL (decl))
804 /* Check for cases where this is sub-optimal, even though valid. */
805 && TREE_CODE (DECL_INITIAL (decl)) != CONSTRUCTOR)
806 return DECL_INITIAL (decl);
810 /* Walk the language specific tree nodes during inlining. */
813 java_tree_inlining_walk_subtrees (tree *tp ATTRIBUTE_UNUSED,
814 int *subtrees ATTRIBUTE_UNUSED,
815 walk_tree_fn func ATTRIBUTE_UNUSED,
816 void *data ATTRIBUTE_UNUSED,
817 void *htab ATTRIBUTE_UNUSED)
822 #define WALK_SUBTREE(NODE) \
825 result = walk_tree (&(NODE), func, data, htab); \
835 code = TREE_CODE (t);
839 if (BLOCK_EXPR_BODY (t))
841 tree *prev = &BLOCK_EXPR_BODY (*tp);
844 WALK_SUBTREE (*prev);
845 prev = &TREE_CHAIN (*prev);
856 /* Called from unsafe_for_reeval. */
858 java_unsafe_for_reeval (tree t)
860 switch (TREE_CODE (t))
863 /* Our expander tries to expand the variables twice. Boom. */
864 if (BLOCK_EXPR_DECLS (t) != NULL)
866 return unsafe_for_reeval (BLOCK_EXPR_BODY (t));
875 /* Every call to a static constructor has an associated boolean
876 variable which is in the outermost scope of the calling method.
877 This variable is used to avoid multiple calls to the static
878 constructor for each class.
880 It looks something like this:
884 boolean dummy = OtherClass.is_initialized;
889 OtherClass.initialize();
891 ... use OtherClass.data ...
894 Each of these boolean variables has an entry in the
895 DECL_FUNCTION_INIT_TEST_TABLE of a method. When inlining a method
896 we must merge the DECL_FUNCTION_INIT_TEST_TABLE from the function
897 being inlined and create the boolean variables in the outermost
898 scope of the method being inlined into. */
900 /* Create a mapping from a boolean variable in a method being inlined
901 to one in the scope of the method being inlined into. */
904 merge_init_test_initialization (void **entry, void *x)
906 struct treetreehash_entry *ite = (struct treetreehash_entry *) *entry;
907 splay_tree decl_map = (splay_tree)x;
909 tree *init_test_decl;
911 /* See if we have remapped this declaration. If we haven't there's
912 a bug in the inliner. */
913 n = splay_tree_lookup (decl_map, (splay_tree_key) ite->value);
917 /* Create a new entry for the class and its remapped boolean
918 variable. If we already have a mapping for this class we've
919 already initialized it, so don't overwrite the value. */
920 init_test_decl = java_treetreehash_new
921 (DECL_FUNCTION_INIT_TEST_TABLE (current_function_decl), ite->key);
922 if (!*init_test_decl)
923 *init_test_decl = (tree)n->value;
928 /* Merge the DECL_FUNCTION_INIT_TEST_TABLE from the function we're
932 java_inlining_merge_static_initializers (tree fn, void *decl_map)
935 (DECL_FUNCTION_INIT_TEST_TABLE (fn),
936 merge_init_test_initialization, decl_map);
939 /* Lookup a DECL_FUNCTION_INIT_TEST_TABLE entry in the method we're
940 inlining into. If we already have a corresponding entry in that
941 class we don't need to create another one, so we create a mapping
942 from the variable in the inlined class to the corresponding
946 inline_init_test_initialization (void **entry, void *x)
948 struct treetreehash_entry *ite = (struct treetreehash_entry *) *entry;
949 splay_tree decl_map = (splay_tree)x;
951 tree h = java_treetreehash_find
952 (DECL_FUNCTION_INIT_TEST_TABLE (current_function_decl), ite->key);
956 splay_tree_insert (decl_map,
957 (splay_tree_key) ite->value,
958 (splay_tree_value) h);
963 /* Look up the boolean variables in the DECL_FUNCTION_INIT_TEST_TABLE
964 of a method being inlined. For each hone, if we already have a
965 variable associated with the same class in the method being inlined
966 into, create a new mapping for it. */
969 java_inlining_map_static_initializers (tree fn, void *decl_map)
972 (DECL_FUNCTION_INIT_TEST_TABLE (fn),
973 inline_init_test_initialization, decl_map);
976 /* Avoid voluminous output for deep recursion of compound exprs. */
979 dump_compound_expr (dump_info_p di, tree t)
985 switch (TREE_CODE (TREE_OPERAND (t, i)))
988 dump_compound_expr (di, TREE_OPERAND (t, i));
991 case EXPR_WITH_FILE_LOCATION:
993 tree wfl_node = EXPR_WFL_NODE (TREE_OPERAND (t, i));
994 dump_child ("expr", wfl_node);
999 dump_child ("expr", TREE_OPERAND (t, i));
1005 java_dump_tree (void *dump_info, tree t)
1007 enum tree_code code;
1008 dump_info_p di = (dump_info_p) dump_info;
1010 /* Figure out what kind of node this is. */
1011 code = TREE_CODE (t);
1016 dump_child ("args", DECL_ARGUMENTS (t));
1017 if (DECL_EXTERNAL (t))
1018 dump_string (di, "undefined");
1019 if (TREE_PUBLIC (t))
1020 dump_string (di, "extern");
1022 dump_string (di, "static");
1023 if (DECL_LANG_SPECIFIC (t))
1024 dump_child ("body", DECL_FUNCTION_BODY (t));
1025 if (DECL_LANG_SPECIFIC (t) && !dump_flag (di, TDF_SLIM, t))
1026 dump_child ("inline body", DECL_SAVED_TREE (t));
1030 dump_child ("expr", TREE_OPERAND (t, 0));
1034 dump_child ("goto", TREE_OPERAND (t, 0));
1038 dump_child ("label", TREE_OPERAND (t, 0));
1041 case LABELED_BLOCK_EXPR:
1042 dump_child ("label", TREE_OPERAND (t, 0));
1043 dump_child ("block", TREE_OPERAND (t, 1));
1046 case EXIT_BLOCK_EXPR:
1047 dump_child ("block", TREE_OPERAND (t, 0));
1048 dump_child ("val", TREE_OPERAND (t, 1));
1052 if (BLOCK_EXPR_BODY (t))
1054 tree local = BLOCK_VARS (t);
1057 tree next = TREE_CHAIN (local);
1058 dump_child ("var", local);
1063 tree block = BLOCK_EXPR_BODY (t);
1064 dump_child ("body", block);
1065 block = TREE_CHAIN (block);
1071 if (!dump_flag (di, TDF_SLIM, t))
1073 dump_compound_expr (di, t);
1082 /* Java calls can't, in general, be sibcalls because we need an
1083 accurate stack trace in order to guarantee correct operation of
1084 methods such as Class.forName(String) and
1085 SecurityManager.getClassContext(). */
1088 java_decl_ok_for_sibcall (tree decl)
1090 return decl != NULL && DECL_CONTEXT (decl) == current_class;
1093 /* Used by estimate_num_insns. Estimate number of instructions seen
1094 by given statement. */
1096 java_estimate_num_insns_1 (tree *tp, int *walk_subtrees, void *data)
1101 if (TYPE_P (x) || DECL_P (x))
1106 /* Assume that constants and references counts nothing. These should
1107 be majorized by amount of operations among them we count later
1108 and are common target of CSE and similar optimizations. */
1109 if (TREE_CODE_CLASS (TREE_CODE (x)) == 'c'
1110 || TREE_CODE_CLASS (TREE_CODE (x)) == 'r')
1112 switch (TREE_CODE (x))
1114 /* Recognize assignments of large structures and constructors of
1119 int size = int_size_in_bytes (TREE_TYPE (x));
1121 if (!size || size > MOVE_MAX_PIECES)
1124 *count += 2 * (size + MOVE_MAX - 1) / MOVE_MAX;
1128 /* Few special cases of expensive operations. This is usefull
1129 to avoid inlining on functions having too many of these. */
1130 case TRUNC_DIV_EXPR:
1132 case FLOOR_DIV_EXPR:
1133 case ROUND_DIV_EXPR:
1134 case TRUNC_MOD_EXPR:
1136 case FLOOR_MOD_EXPR:
1137 case ROUND_MOD_EXPR:
1141 case NEW_ARRAY_EXPR:
1142 case NEW_ANONYMOUS_ARRAY_EXPR:
1143 case NEW_CLASS_EXPR:
1146 /* Various containers that will produce no code themselves. */
1153 case IDENTIFIER_NODE:
1154 case PLACEHOLDER_EXPR:
1155 case WITH_CLEANUP_EXPR:
1156 case CLEANUP_POINT_EXPR:
1158 case VIEW_CONVERT_EXPR:
1164 case TRY_CATCH_EXPR:
1165 case TRY_FINALLY_EXPR:
1168 case LABELED_BLOCK_EXPR:
1169 case EXIT_BLOCK_EXPR:
1170 case EXPR_WITH_FILE_LOCATION:
1171 case UNARY_PLUS_EXPR:
1186 /* Estimate number of instructions that will be created by expanding the body. */
1188 java_estimate_num_insns (tree decl)
1191 walk_tree_without_duplicates (&DECL_SAVED_TREE (decl),
1192 java_estimate_num_insns_1, &num);
1196 /* Start inlining fn. Called by the tree inliner via
1197 lang_hooks.tree_inlining.cannot_inline_tree_fn. */
1200 java_start_inlining (tree fn)
1202 /* A java function's body doesn't have a BLOCK structure suitable
1203 for debug output until it is expanded. Prevent inlining functions
1204 that are not yet expanded. */
1205 return TREE_ASM_WRITTEN (fn) ? 1 : 0;
1208 #include "gt-java-lang.h"