1 /* Java(TM) language-specific utility routines.
2 Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
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 /* FIXME: Indirect dispatch isn't yet compatible with static class
468 init optimization. */
469 if (flag_indirect_dispatch)
470 always_initialize_class_p = true;
472 /* Force minimum function alignment if g++ uses the least significant
473 bit of function pointers to store the virtual bit. This is required
474 to keep vtables compatible. */
475 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
476 && force_align_functions_log < 1)
477 force_align_functions_log = 1;
479 jcf_path_seal (v_flag);
481 java_init_decl_processing ();
483 using_eh_for_cleanups ();
491 jcf_dependency_write ();
494 /* Buffer used by lang_printable_name. */
495 static char *decl_buf = NULL;
497 /* Allocated size of decl_buf. */
498 static int decl_buflen = 0;
500 /* Length of used part of decl_buf; position for next character. */
501 static int decl_bufpos = 0;
503 /* Append the string STR to decl_buf.
504 It length is given by LEN; -1 means the string is nul-terminated. */
507 put_decl_string (const char *str, int len)
511 if (decl_bufpos + len >= decl_buflen)
513 if (decl_buf == NULL)
515 decl_buflen = len + 100;
516 decl_buf = xmalloc (decl_buflen);
521 decl_buf = xrealloc (decl_buf, decl_buflen);
524 strcpy (decl_buf + decl_bufpos, str);
528 /* Append to decl_buf a printable name for NODE. */
531 put_decl_node (tree node)
534 if (TREE_CODE (node) == POINTER_TYPE)
536 node = TREE_TYPE (node);
539 if (TREE_CODE_CLASS (TREE_CODE (node)) == 'd'
540 && DECL_NAME (node) != NULL_TREE)
542 if (TREE_CODE (node) == FUNCTION_DECL)
544 /* We want to print the type the DECL belongs to. We don't do
545 that when we handle constructors. */
546 if (! DECL_CONSTRUCTOR_P (node)
547 && ! DECL_ARTIFICIAL (node) && DECL_CONTEXT (node))
549 put_decl_node (TYPE_NAME (DECL_CONTEXT (node)));
550 put_decl_string (".", 1);
552 if (! DECL_CONSTRUCTOR_P (node))
553 put_decl_node (DECL_NAME (node));
554 if (TREE_TYPE (node) != NULL_TREE)
557 tree args = TYPE_ARG_TYPES (TREE_TYPE (node));
558 if (TREE_CODE (TREE_TYPE (node)) == METHOD_TYPE)
559 args = TREE_CHAIN (args);
560 put_decl_string ("(", 1);
561 for ( ; args != end_params_node; args = TREE_CHAIN (args), i++)
564 put_decl_string (",", 1);
565 put_decl_node (TREE_VALUE (args));
567 put_decl_string (")", 1);
571 put_decl_node (DECL_NAME (node));
573 else if (TREE_CODE_CLASS (TREE_CODE (node)) == 't'
574 && TYPE_NAME (node) != NULL_TREE)
576 if (TREE_CODE (node) == RECORD_TYPE && TYPE_ARRAY_P (node))
578 put_decl_node (TYPE_ARRAY_ELEMENT (node));
579 put_decl_string("[]", 2);
581 else if (node == promoted_byte_type_node)
582 put_decl_string ("byte", 4);
583 else if (node == promoted_short_type_node)
584 put_decl_string ("short", 5);
585 else if (node == promoted_char_type_node)
586 put_decl_string ("char", 4);
587 else if (node == promoted_boolean_type_node)
588 put_decl_string ("boolean", 7);
589 else if (node == void_type_node && was_pointer)
590 put_decl_string ("null", 4);
592 put_decl_node (TYPE_NAME (node));
594 else if (TREE_CODE (node) == IDENTIFIER_NODE)
595 put_decl_string (IDENTIFIER_POINTER (node), IDENTIFIER_LENGTH (node));
597 put_decl_string ("<unknown>", -1);
600 /* Return a user-friendly name for DECL.
601 The resulting string is only valid until the next call.
602 The value of the hook decl_printable_name is this function,
603 which is also called directly by java_print_error_function. */
606 lang_printable_name (tree decl, int v __attribute__ ((__unused__)))
609 put_decl_node (decl);
610 put_decl_string ("", 1);
614 /* Does the same thing that lang_printable_name, but add a leading
615 space to the DECL name string -- With Leading Space. */
618 lang_printable_name_wls (tree decl, int v __attribute__ ((__unused__)))
621 put_decl_node (decl);
622 put_decl_string ("", 1);
627 /* Print on stderr the current class and method context. This function
628 is the value of the hook print_error_function. */
630 static GTY(()) tree last_error_function_context;
631 static GTY(()) tree last_error_function;
633 java_print_error_function (diagnostic_context *context ATTRIBUTE_UNUSED,
636 /* Don't print error messages with bogus function prototypes. */
637 if (inhibit_error_function_printing)
640 if (current_function_decl != NULL
641 && DECL_CONTEXT (current_function_decl) != last_error_function_context)
644 fprintf (stderr, "%s: ", file);
646 last_error_function_context = DECL_CONTEXT (current_function_decl);
647 fprintf (stderr, "In class `%s':\n",
648 lang_printable_name (last_error_function_context, 0));
650 if (last_error_function != current_function_decl)
653 fprintf (stderr, "%s: ", file);
655 if (current_function_decl == NULL)
656 fprintf (stderr, "At top level:\n");
659 const char *name = lang_printable_name (current_function_decl, 2);
660 fprintf (stderr, "In %s `%s':\n",
661 (DECL_CONSTRUCTOR_P (current_function_decl) ? "constructor"
666 last_error_function = current_function_decl;
671 /* Called to install the PRINT_ERROR_FUNCTION hook differently
672 according to LEVEL. LEVEL is 1 during early parsing, when function
673 prototypes aren't fully resolved. java_print_error_function is set
674 so it doesn't print incomplete function prototypes. When LEVEL is
675 2, function prototypes are fully resolved and can be printed when
678 void lang_init_source (int level)
680 inhibit_error_function_printing = (level == 1);
684 java_init_options (unsigned int argc ATTRIBUTE_UNUSED,
685 const char **argv ATTRIBUTE_UNUSED)
687 flag_bounds_check = 1;
689 flag_non_call_exceptions = 1;
691 /* In Java floating point operations never trap. */
692 flag_trapping_math = 0;
694 /* In Java arithmetic overflow always wraps around. */
697 /* Java requires left-to-right evaluation of subexpressions. */
698 flag_evaluation_order = 1;
706 java_can_use_bit_fields_p (void)
708 /* The bit-field optimizations cause problems when generating class
710 return flag_emit_class_files ? false : true;
713 /* Post-switch processing. */
715 java_post_options (const char **pfilename)
717 const char *filename = *pfilename;
719 /* Use tree inlining if possible. Function instrumentation is only
720 done in the RTL level, so we disable tree inlining. */
721 if (! flag_instrument_function_entry_exit)
725 if (flag_inline_functions)
727 flag_inline_trees = 2;
728 flag_inline_functions = 0;
732 /* Open input file. */
734 if (filename == 0 || !strcmp (filename, "-"))
739 if (dependency_tracking)
740 error ("can't do dependency tracking with input from stdin");
744 if (dependency_tracking)
748 /* If the target is set and the output filename is set, then
749 there's no processing to do here. Otherwise we must
750 compute one or the other. */
751 if (! ((dependency_tracking & DEPEND_TARGET_SET)
752 && (dependency_tracking & DEPEND_FILE_ALREADY_SET)))
754 dot = strrchr (filename, '.');
756 error ("couldn't determine target name for dependency tracking");
759 char *buf = xmalloc (dot - filename +
760 3 + sizeof (TARGET_OBJECT_SUFFIX));
761 strncpy (buf, filename, dot - filename);
763 /* If emitting class files, we might have multiple
764 targets. The class generation code takes care of
765 registering them. Otherwise we compute the
767 if ((dependency_tracking & DEPEND_TARGET_SET))
769 else if (flag_emit_class_files)
770 jcf_dependency_set_target (NULL);
773 strcpy (buf + (dot - filename), TARGET_OBJECT_SUFFIX);
774 jcf_dependency_set_target (buf);
777 if ((dependency_tracking & DEPEND_FILE_ALREADY_SET))
779 else if ((dependency_tracking & DEPEND_SET_FILE))
781 strcpy (buf + (dot - filename), ".d");
782 jcf_dependency_set_dep_file (buf);
785 jcf_dependency_set_dep_file ("-");
793 /* Initialize the compiler back end. */
797 /* Return either DECL or its known constant value (if it has one). */
800 decl_constant_value (tree decl)
802 if (/* Don't change a variable array bound or initial value to a constant
803 in a place where a variable is invalid. */
804 current_function_decl != 0
805 && ! TREE_THIS_VOLATILE (decl)
806 && TREE_READONLY (decl)
807 && DECL_INITIAL (decl) != 0
808 && TREE_CODE (DECL_INITIAL (decl)) != ERROR_MARK
809 /* This is invalid if initial value is not constant.
810 If it has either a function call, a memory reference,
811 or a variable, then re-evaluating it could give different results. */
812 && TREE_CONSTANT (DECL_INITIAL (decl))
813 /* Check for cases where this is sub-optimal, even though valid. */
814 && TREE_CODE (DECL_INITIAL (decl)) != CONSTRUCTOR)
815 return DECL_INITIAL (decl);
819 /* Walk the language specific tree nodes during inlining. */
822 java_tree_inlining_walk_subtrees (tree *tp ATTRIBUTE_UNUSED,
823 int *subtrees ATTRIBUTE_UNUSED,
824 walk_tree_fn func ATTRIBUTE_UNUSED,
825 void *data ATTRIBUTE_UNUSED,
826 void *htab ATTRIBUTE_UNUSED)
831 #define WALK_SUBTREE(NODE) \
834 result = walk_tree (&(NODE), func, data, htab); \
844 code = TREE_CODE (t);
848 WALK_SUBTREE (BLOCK_EXPR_BODY (t));
858 /* Called from unsafe_for_reeval. */
860 java_unsafe_for_reeval (tree t)
862 switch (TREE_CODE (t))
865 /* Our expander tries to expand the variables twice. Boom. */
866 if (BLOCK_EXPR_DECLS (t) != NULL)
868 return unsafe_for_reeval (BLOCK_EXPR_BODY (t));
877 /* Every call to a static constructor has an associated boolean
878 variable which is in the outermost scope of the calling method.
879 This variable is used to avoid multiple calls to the static
880 constructor for each class.
882 It looks something like this:
886 boolean dummy = OtherClass.is_initialized;
891 OtherClass.initialize();
893 ... use OtherClass.data ...
896 Each of these boolean variables has an entry in the
897 DECL_FUNCTION_INIT_TEST_TABLE of a method. When inlining a method
898 we must merge the DECL_FUNCTION_INIT_TEST_TABLE from the function
899 being inlined and create the boolean variables in the outermost
900 scope of the method being inlined into. */
902 /* Create a mapping from a boolean variable in a method being inlined
903 to one in the scope of the method being inlined into. */
906 merge_init_test_initialization (void **entry, void *x)
908 struct treetreehash_entry *ite = (struct treetreehash_entry *) *entry;
909 splay_tree decl_map = (splay_tree)x;
911 tree *init_test_decl;
913 /* See if we have remapped this declaration. If we haven't there's
914 a bug in the inliner. */
915 n = splay_tree_lookup (decl_map, (splay_tree_key) ite->value);
919 /* Create a new entry for the class and its remapped boolean
920 variable. If we already have a mapping for this class we've
921 already initialized it, so don't overwrite the value. */
922 init_test_decl = java_treetreehash_new
923 (DECL_FUNCTION_INIT_TEST_TABLE (current_function_decl), ite->key);
924 if (!*init_test_decl)
925 *init_test_decl = (tree)n->value;
927 /* This fixes a weird case.
929 The front end assumes that once we have called a method that
930 initializes some class, we can assume the class is initialized. It
931 does this by setting the DECL_INITIAL of the init_test_decl for that
932 class, and no initializations are emitted for that class.
934 However, what if the method that is suppoed to do the initialization
935 is itself inlined in the caller? When expanding the called method
936 we'll assume that the class initalization has already been done,
937 because the DECL_INITIAL of the init_test_decl is set.
939 To fix this we remove the DECL_INITIAL (in the caller scope) of all
940 the init_test_decls corresponding to classes initialized by the
941 inlined method. This makes the caller no longer assume that the
942 method being inlined does any class initializations. */
943 DECL_INITIAL (*init_test_decl) = NULL;
948 /* Merge the DECL_FUNCTION_INIT_TEST_TABLE from the function we're
952 java_inlining_merge_static_initializers (tree fn, void *decl_map)
955 (DECL_FUNCTION_INIT_TEST_TABLE (fn),
956 merge_init_test_initialization, decl_map);
959 /* Lookup a DECL_FUNCTION_INIT_TEST_TABLE entry in the method we're
960 inlining into. If we already have a corresponding entry in that
961 class we don't need to create another one, so we create a mapping
962 from the variable in the inlined class to the corresponding
966 inline_init_test_initialization (void **entry, void *x)
968 struct treetreehash_entry *ite = (struct treetreehash_entry *) *entry;
969 splay_tree decl_map = (splay_tree)x;
971 tree h = java_treetreehash_find
972 (DECL_FUNCTION_INIT_TEST_TABLE (current_function_decl), ite->key);
975 splay_tree_insert (decl_map,
976 (splay_tree_key) ite->value,
977 (splay_tree_value) h);
981 /* Look up the boolean variables in the DECL_FUNCTION_INIT_TEST_TABLE
982 of a method being inlined. For each hone, if we already have a
983 variable associated with the same class in the method being inlined
984 into, create a new mapping for it. */
987 java_inlining_map_static_initializers (tree fn, void *decl_map)
990 (DECL_FUNCTION_INIT_TEST_TABLE (fn),
991 inline_init_test_initialization, decl_map);
994 /* Avoid voluminous output for deep recursion of compound exprs. */
997 dump_compound_expr (dump_info_p di, tree t)
1003 switch (TREE_CODE (TREE_OPERAND (t, i)))
1006 dump_compound_expr (di, TREE_OPERAND (t, i));
1009 case EXPR_WITH_FILE_LOCATION:
1011 tree wfl_node = EXPR_WFL_NODE (TREE_OPERAND (t, i));
1012 dump_child ("expr", wfl_node);
1017 dump_child ("expr", TREE_OPERAND (t, i));
1023 java_dump_tree (void *dump_info, tree t)
1025 enum tree_code code;
1026 dump_info_p di = (dump_info_p) dump_info;
1028 /* Figure out what kind of node this is. */
1029 code = TREE_CODE (t);
1034 dump_child ("args", DECL_ARGUMENTS (t));
1035 if (DECL_EXTERNAL (t))
1036 dump_string (di, "undefined");
1037 if (TREE_PUBLIC (t))
1038 dump_string (di, "extern");
1040 dump_string (di, "static");
1041 if (DECL_LANG_SPECIFIC (t))
1042 dump_child ("body", DECL_FUNCTION_BODY (t));
1043 if (DECL_LANG_SPECIFIC (t) && !dump_flag (di, TDF_SLIM, t))
1044 dump_child ("inline body", DECL_SAVED_TREE (t));
1048 dump_child ("expr", TREE_OPERAND (t, 0));
1052 dump_child ("goto", TREE_OPERAND (t, 0));
1056 dump_child ("label", TREE_OPERAND (t, 0));
1059 case LABELED_BLOCK_EXPR:
1060 dump_child ("label", TREE_OPERAND (t, 0));
1061 dump_child ("block", TREE_OPERAND (t, 1));
1064 case EXIT_BLOCK_EXPR:
1065 dump_child ("block", TREE_OPERAND (t, 0));
1066 dump_child ("val", TREE_OPERAND (t, 1));
1070 if (BLOCK_EXPR_BODY (t))
1072 tree local = BLOCK_VARS (t);
1075 tree next = TREE_CHAIN (local);
1076 dump_child ("var", local);
1081 tree block = BLOCK_EXPR_BODY (t);
1082 dump_child ("body", block);
1083 block = TREE_CHAIN (block);
1089 if (!dump_flag (di, TDF_SLIM, t))
1091 dump_compound_expr (di, t);
1100 /* Java calls can't, in general, be sibcalls because we need an
1101 accurate stack trace in order to guarantee correct operation of
1102 methods such as Class.forName(String) and
1103 SecurityManager.getClassContext(). */
1106 java_decl_ok_for_sibcall (tree decl)
1108 return decl != NULL && DECL_CONTEXT (decl) == output_class;
1111 /* Used by estimate_num_insns. Estimate number of instructions seen
1112 by given statement. */
1114 java_estimate_num_insns_1 (tree *tp, int *walk_subtrees, void *data)
1119 if (TYPE_P (x) || DECL_P (x))
1124 /* Assume that constants and references counts nothing. These should
1125 be majorized by amount of operations among them we count later
1126 and are common target of CSE and similar optimizations. */
1127 if (TREE_CODE_CLASS (TREE_CODE (x)) == 'c'
1128 || TREE_CODE_CLASS (TREE_CODE (x)) == 'r')
1130 switch (TREE_CODE (x))
1132 /* Recognize assignments of large structures and constructors of
1139 size = int_size_in_bytes (TREE_TYPE (x));
1141 if (size < 0 || size > MOVE_MAX_PIECES * MOVE_RATIO)
1144 *count += ((size + MOVE_MAX_PIECES - 1) / MOVE_MAX_PIECES);
1147 /* Few special cases of expensive operations. This is usefull
1148 to avoid inlining on functions having too many of these. */
1149 case TRUNC_DIV_EXPR:
1151 case FLOOR_DIV_EXPR:
1152 case ROUND_DIV_EXPR:
1153 case TRUNC_MOD_EXPR:
1155 case FLOOR_MOD_EXPR:
1156 case ROUND_MOD_EXPR:
1160 case NEW_ARRAY_EXPR:
1161 case NEW_ANONYMOUS_ARRAY_EXPR:
1162 case NEW_CLASS_EXPR:
1165 /* Various containers that will produce no code themselves. */
1172 case IDENTIFIER_NODE:
1173 case PLACEHOLDER_EXPR:
1174 case WITH_CLEANUP_EXPR:
1175 case CLEANUP_POINT_EXPR:
1177 case VIEW_CONVERT_EXPR:
1183 case TRY_CATCH_EXPR:
1184 case TRY_FINALLY_EXPR:
1187 case LABELED_BLOCK_EXPR:
1188 case EXIT_BLOCK_EXPR:
1189 case EXPR_WITH_FILE_LOCATION:
1190 case UNARY_PLUS_EXPR:
1205 /* Estimate number of instructions that will be created by expanding the body. */
1207 java_estimate_num_insns (tree decl)
1210 walk_tree_without_duplicates (&DECL_SAVED_TREE (decl),
1211 java_estimate_num_insns_1, &num);
1215 /* Start inlining fn. Called by the tree inliner via
1216 lang_hooks.tree_inlining.cannot_inline_tree_fn. */
1219 java_start_inlining (tree fn)
1221 /* A java function's body doesn't have a BLOCK structure suitable
1222 for debug output until it is expanded. Prevent inlining functions
1223 that are not yet expanded. */
1224 return TREE_ASM_WRITTEN (fn) ? 1 : 0;
1227 /* Given a call_expr, try to figure out what its target might be. In
1228 the case of an indirection via the atable, search for the decl. If
1229 the decl is external, we return NULL. If we don't, the optimizer
1230 will replace the indirection with a direct call, which undoes the
1231 purpose of the atable indirection. */
1233 java_get_callee_fndecl (tree call_expr)
1235 tree method, table, element, atable_methods;
1237 HOST_WIDE_INT index;
1239 if (TREE_CODE (call_expr) != CALL_EXPR)
1241 method = TREE_OPERAND (call_expr, 0);
1242 STRIP_NOPS (method);
1243 if (TREE_CODE (method) != ARRAY_REF)
1245 table = TREE_OPERAND (method, 0);
1246 if (! DECL_LANG_SPECIFIC(table)
1247 || !DECL_OWNER (table)
1248 || TYPE_ATABLE_DECL (DECL_OWNER (table)) != table)
1251 atable_methods = TYPE_ATABLE_METHODS (DECL_OWNER (table));
1252 index = TREE_INT_CST_LOW (TREE_OPERAND (method, 1));
1254 /* FIXME: Replace this for loop with a hash table lookup. */
1255 for (element = atable_methods; element; element = TREE_CHAIN (element))
1259 tree purpose = TREE_PURPOSE (element);
1260 if (TREE_CODE (purpose) == FUNCTION_DECL
1261 && ! DECL_EXTERNAL (purpose))
1272 #include "gt-java-lang.h"