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 tree java_get_callee_fndecl (tree);
71 #ifndef TARGET_OBJECT_SUFFIX
72 # define TARGET_OBJECT_SUFFIX ".o"
75 /* Table indexed by tree code giving a string containing a character
76 classifying the tree code. Possibilities are
77 t, d, s, c, r, <, 1 and 2. See java/java-tree.def for details. */
79 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) TYPE,
81 const char tree_code_type[] = {
84 #include "java-tree.def"
88 /* Table indexed by tree code giving number of expression
89 operands beyond the fixed part of the node structure.
90 Not used for types or decls. */
92 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) LENGTH,
94 const unsigned char tree_code_length[] = {
97 #include "java-tree.def"
101 /* Names of tree components.
102 Used for printing out the tree and error messages. */
103 #define DEFTREECODE(SYM, NAME, TYPE, LEN) NAME,
105 const char *const tree_code_name[] = {
108 #include "java-tree.def"
112 /* Used to avoid printing error messages with bogus function
113 prototypes. Starts out false. */
114 static bool inhibit_error_function_printing;
116 int compiling_from_source;
118 const char *resource_name;
120 int flag_emit_class_files = 0;
122 /* Nonzero if input file is a file with a list of filenames to compile. */
124 int flag_filelist_file = 0;
126 /* When nonzero, we emit xref strings. Values of the flag for xref
127 backends are defined in xref_flag_table, xref.c. */
129 int flag_emit_xref = 0;
131 /* When nonzero, -Wall was turned on. */
134 /* When nonzero, check for redundant modifier uses. */
135 int flag_redundant = 0;
137 /* When nonzero, call a library routine to do integer divisions. */
138 int flag_use_divide_subroutine = 1;
140 /* When nonzero, generate code for the Boehm GC. */
141 int flag_use_boehm_gc = 0;
143 /* When nonzero, assume the runtime uses a hash table to map an
144 object to its synchronization structure. */
145 int flag_hash_synchronization;
147 /* When nonzero, permit the use of the assert keyword. */
150 /* When nonzero, assume all native functions are implemented with
154 /* When nonzero, warn when source file is newer than matching class
158 /* When nonzero, generate checks for references to NULL. */
159 int flag_check_references = 0;
161 /* The encoding of the source file. */
162 const char *current_encoding = NULL;
164 /* When nonzero, report the now deprecated empty statements. */
165 int flag_extraneous_semicolon;
167 /* When nonzero, report use of deprecated classes, methods, or fields. */
168 int flag_deprecated = 1;
170 /* When nonzero, always check for a non gcj generated classes archive. */
171 int flag_force_classes_archive_check;
173 /* When zero, don't optimize static class initialization. This flag shouldn't
174 be tested alone, use STATIC_CLASS_INITIALIZATION_OPTIMIZATION_P instead. */
175 /* FIXME: Make this work with gimplify. */
176 int flag_optimize_sci = 0;
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_DUMP_DUMP_TREE_FN
252 #define LANG_HOOKS_TREE_DUMP_DUMP_TREE_FN java_dump_tree
254 #undef LANG_HOOKS_GIMPLIFY_EXPR
255 #define LANG_HOOKS_GIMPLIFY_EXPR java_gimplify_expr
257 #undef LANG_HOOKS_TREE_INLINING_WALK_SUBTREES
258 #define LANG_HOOKS_TREE_INLINING_WALK_SUBTREES java_tree_inlining_walk_subtrees
260 #undef LANG_HOOKS_DECL_OK_FOR_SIBCALL
261 #define LANG_HOOKS_DECL_OK_FOR_SIBCALL java_decl_ok_for_sibcall
263 #undef LANG_HOOKS_GET_CALLEE_FNDECL
264 #define LANG_HOOKS_GET_CALLEE_FNDECL java_get_callee_fndecl
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_fenable_assertions_:
354 add_enable_assert (arg, value);
357 case OPT_fenable_assertions:
358 add_enable_assert ("", value);
361 case OPT_fdisable_assertions_:
362 add_enable_assert (arg, !value);
365 case OPT_fdisable_assertions:
366 add_enable_assert ("", !value);
369 case OPT_fassume_compiled_:
370 add_assume_compiled (arg, !value);
373 case OPT_fassume_compiled:
374 add_assume_compiled ("", !value);
377 case OPT_fbootclasspath_:
378 jcf_path_bootclasspath_arg (arg);
381 case OPT_fcheck_references:
382 flag_check_references = value;
385 case OPT_fclasspath_:
386 case OPT_fCLASSPATH_:
387 jcf_path_classpath_arg (arg);
390 case OPT_fcompile_resource_:
395 if (!dump_switch_p (arg))
399 case OPT_femit_class_file:
400 case OPT_femit_class_files:
401 flag_emit_class_files = value;
405 current_encoding = arg;
409 jcf_path_extdirs_arg (arg);
412 case OPT_ffilelist_file:
413 flag_filelist_file = value;
416 case OPT_fforce_classes_archive_check:
417 flag_force_classes_archive_check = value;
420 case OPT_fhash_synchronization:
421 flag_hash_synchronization = value;
424 case OPT_findirect_dispatch:
425 flag_indirect_dispatch = value;
428 case OPT_finline_functions:
429 flag_inline_functions = value;
430 flag_really_inline = value;
437 case OPT_foptimize_static_class_initialization:
438 flag_optimize_sci = value;
441 case OPT_foutput_class_dir_:
442 jcf_write_base_directory = arg;
445 case OPT_fstore_check:
446 flag_store_check = value;
449 case OPT_fuse_boehm_gc:
450 flag_use_boehm_gc = value;
453 case OPT_fuse_divide_subroutine:
454 flag_use_divide_subroutine = value;
465 /* Global open file. */
472 extern int flag_minimal_debug;
473 flag_minimal_debug = 0;
476 if (flag_inline_functions)
477 flag_inline_trees = 1;
479 /* FIXME: Indirect dispatch isn't yet compatible with static class
480 init optimization. */
481 if (flag_indirect_dispatch)
482 always_initialize_class_p = true;
484 /* Force minimum function alignment if g++ uses the least significant
485 bit of function pointers to store the virtual bit. This is required
486 to keep vtables compatible. */
487 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
488 && force_align_functions_log < 1)
489 force_align_functions_log = 1;
491 jcf_path_seal (v_flag);
493 java_init_decl_processing ();
495 using_eh_for_cleanups ();
503 jcf_dependency_write ();
506 /* Buffer used by lang_printable_name. */
507 static char *decl_buf = NULL;
509 /* Allocated size of decl_buf. */
510 static int decl_buflen = 0;
512 /* Length of used part of decl_buf; position for next character. */
513 static int decl_bufpos = 0;
515 /* Append the string STR to decl_buf.
516 It length is given by LEN; -1 means the string is nul-terminated. */
519 put_decl_string (const char *str, int len)
523 if (decl_bufpos + len >= decl_buflen)
525 if (decl_buf == NULL)
527 decl_buflen = len + 100;
528 decl_buf = xmalloc (decl_buflen);
533 decl_buf = xrealloc (decl_buf, decl_buflen);
536 strcpy (decl_buf + decl_bufpos, str);
540 /* Append to decl_buf a printable name for NODE. */
543 put_decl_node (tree node)
546 if (TREE_CODE (node) == POINTER_TYPE)
548 node = TREE_TYPE (node);
551 if (TREE_CODE_CLASS (TREE_CODE (node)) == 'd'
552 && DECL_NAME (node) != NULL_TREE)
554 if (TREE_CODE (node) == FUNCTION_DECL)
556 /* We want to print the type the DECL belongs to. We don't do
557 that when we handle constructors. */
558 if (! DECL_CONSTRUCTOR_P (node)
559 && ! DECL_ARTIFICIAL (node) && DECL_CONTEXT (node))
561 put_decl_node (TYPE_NAME (DECL_CONTEXT (node)));
562 put_decl_string (".", 1);
564 if (! DECL_CONSTRUCTOR_P (node))
565 put_decl_node (DECL_NAME (node));
566 if (TREE_TYPE (node) != NULL_TREE)
569 tree args = TYPE_ARG_TYPES (TREE_TYPE (node));
570 if (TREE_CODE (TREE_TYPE (node)) == METHOD_TYPE)
571 args = TREE_CHAIN (args);
572 put_decl_string ("(", 1);
573 for ( ; args != end_params_node; args = TREE_CHAIN (args), i++)
576 put_decl_string (",", 1);
577 put_decl_node (TREE_VALUE (args));
579 put_decl_string (")", 1);
583 put_decl_node (DECL_NAME (node));
585 else if (TREE_CODE_CLASS (TREE_CODE (node)) == 't'
586 && TYPE_NAME (node) != NULL_TREE)
588 if (TREE_CODE (node) == RECORD_TYPE && TYPE_ARRAY_P (node))
590 put_decl_node (TYPE_ARRAY_ELEMENT (node));
591 put_decl_string("[]", 2);
593 else if (node == promoted_byte_type_node)
594 put_decl_string ("byte", 4);
595 else if (node == promoted_short_type_node)
596 put_decl_string ("short", 5);
597 else if (node == promoted_char_type_node)
598 put_decl_string ("char", 4);
599 else if (node == promoted_boolean_type_node)
600 put_decl_string ("boolean", 7);
601 else if (node == void_type_node && was_pointer)
602 put_decl_string ("null", 4);
604 put_decl_node (TYPE_NAME (node));
606 else if (TREE_CODE (node) == IDENTIFIER_NODE)
607 put_decl_string (IDENTIFIER_POINTER (node), IDENTIFIER_LENGTH (node));
609 put_decl_string ("<unknown>", -1);
612 /* Return a user-friendly name for DECL.
613 The resulting string is only valid until the next call.
614 The value of the hook decl_printable_name is this function,
615 which is also called directly by java_print_error_function. */
618 lang_printable_name (tree decl, int v __attribute__ ((__unused__)))
621 put_decl_node (decl);
622 put_decl_string ("", 1);
626 /* Does the same thing that lang_printable_name, but add a leading
627 space to the DECL name string -- With Leading Space. */
630 lang_printable_name_wls (tree decl, int v __attribute__ ((__unused__)))
633 put_decl_node (decl);
634 put_decl_string ("", 1);
639 /* Print on stderr the current class and method context. This function
640 is the value of the hook print_error_function. */
642 static GTY(()) tree last_error_function_context;
643 static GTY(()) tree last_error_function;
645 java_print_error_function (diagnostic_context *context ATTRIBUTE_UNUSED,
648 /* Don't print error messages with bogus function prototypes. */
649 if (inhibit_error_function_printing)
652 if (current_function_decl != NULL
653 && DECL_CONTEXT (current_function_decl) != last_error_function_context)
656 fprintf (stderr, "%s: ", file);
658 last_error_function_context = DECL_CONTEXT (current_function_decl);
659 fprintf (stderr, "In class `%s':\n",
660 lang_printable_name (last_error_function_context, 0));
662 if (last_error_function != current_function_decl)
665 fprintf (stderr, "%s: ", file);
667 if (current_function_decl == NULL)
668 fprintf (stderr, "At top level:\n");
671 const char *name = lang_printable_name (current_function_decl, 2);
672 fprintf (stderr, "In %s `%s':\n",
673 (DECL_CONSTRUCTOR_P (current_function_decl) ? "constructor"
678 last_error_function = current_function_decl;
683 /* Called to install the PRINT_ERROR_FUNCTION hook differently
684 according to LEVEL. LEVEL is 1 during early parsing, when function
685 prototypes aren't fully resolved. java_print_error_function is set
686 so it doesn't print incomplete function prototypes. When LEVEL is
687 2, function prototypes are fully resolved and can be printed when
691 lang_init_source (int level)
693 inhibit_error_function_printing = (level == 1);
697 java_init_options (unsigned int argc ATTRIBUTE_UNUSED,
698 const char **argv ATTRIBUTE_UNUSED)
700 flag_bounds_check = 1;
702 flag_non_call_exceptions = 1;
704 /* In Java floating point operations never trap. */
705 flag_trapping_math = 0;
707 /* In Java arithmetic overflow always wraps around. */
710 /* Java requires left-to-right evaluation of subexpressions. */
711 flag_evaluation_order = 1;
719 java_can_use_bit_fields_p (void)
721 /* The bit-field optimizations cause problems when generating class
723 return flag_emit_class_files ? false : true;
726 /* Post-switch processing. */
728 java_post_options (const char **pfilename)
730 const char *filename = *pfilename;
732 /* Use tree inlining. */
735 if (flag_inline_functions)
737 flag_inline_trees = 2;
738 flag_inline_functions = 0;
741 /* Open input file. */
743 if (filename == 0 || !strcmp (filename, "-"))
748 if (dependency_tracking)
749 error ("can't do dependency tracking with input from stdin");
753 if (dependency_tracking)
757 /* If the target is set and the output filename is set, then
758 there's no processing to do here. Otherwise we must
759 compute one or the other. */
760 if (! ((dependency_tracking & DEPEND_TARGET_SET)
761 && (dependency_tracking & DEPEND_FILE_ALREADY_SET)))
763 dot = strrchr (filename, '.');
765 error ("couldn't determine target name for dependency tracking");
768 char *buf = xmalloc (dot - filename +
769 3 + sizeof (TARGET_OBJECT_SUFFIX));
770 strncpy (buf, filename, dot - filename);
772 /* If emitting class files, we might have multiple
773 targets. The class generation code takes care of
774 registering them. Otherwise we compute the
776 if ((dependency_tracking & DEPEND_TARGET_SET))
778 else if (flag_emit_class_files)
779 jcf_dependency_set_target (NULL);
782 strcpy (buf + (dot - filename), TARGET_OBJECT_SUFFIX);
783 jcf_dependency_set_target (buf);
786 if ((dependency_tracking & DEPEND_FILE_ALREADY_SET))
788 else if ((dependency_tracking & DEPEND_SET_FILE))
790 strcpy (buf + (dot - filename), ".d");
791 jcf_dependency_set_dep_file (buf);
794 jcf_dependency_set_dep_file ("-");
802 /* Initialize the compiler back end. */
806 /* Return either DECL or its known constant value (if it has one). */
809 decl_constant_value (tree decl)
811 if (/* Don't change a variable array bound or initial value to a constant
812 in a place where a variable is invalid. */
813 current_function_decl != 0
814 && ! TREE_THIS_VOLATILE (decl)
815 && TREE_READONLY (decl)
816 && DECL_INITIAL (decl) != 0
817 && TREE_CODE (DECL_INITIAL (decl)) != ERROR_MARK
818 /* This is invalid if initial value is not constant.
819 If it has either a function call, a memory reference,
820 or a variable, then re-evaluating it could give different results. */
821 && TREE_CONSTANT (DECL_INITIAL (decl))
822 /* Check for cases where this is sub-optimal, even though valid. */
823 && TREE_CODE (DECL_INITIAL (decl)) != CONSTRUCTOR)
824 return DECL_INITIAL (decl);
828 /* Walk the language specific tree nodes during inlining. */
831 java_tree_inlining_walk_subtrees (tree *tp ATTRIBUTE_UNUSED,
832 int *subtrees ATTRIBUTE_UNUSED,
833 walk_tree_fn func ATTRIBUTE_UNUSED,
834 void *data ATTRIBUTE_UNUSED,
835 void *htab ATTRIBUTE_UNUSED)
840 #define WALK_SUBTREE(NODE) \
843 result = walk_tree (&(NODE), func, data, htab); \
853 code = TREE_CODE (t);
857 WALK_SUBTREE (BLOCK_EXPR_BODY (t));
867 /* Called from unsafe_for_reeval. */
869 java_unsafe_for_reeval (tree t)
871 switch (TREE_CODE (t))
874 /* Our expander tries to expand the variables twice. Boom. */
875 if (BLOCK_EXPR_DECLS (t) != NULL)
877 return unsafe_for_reeval (BLOCK_EXPR_BODY (t));
886 /* Every call to a static constructor has an associated boolean
887 variable which is in the outermost scope of the calling method.
888 This variable is used to avoid multiple calls to the static
889 constructor for each class.
891 It looks something like this:
895 boolean dummy = OtherClass.is_initialized;
900 OtherClass.initialize();
902 ... use OtherClass.data ...
905 Each of these boolean variables has an entry in the
906 DECL_FUNCTION_INIT_TEST_TABLE of a method. When inlining a method
907 we must merge the DECL_FUNCTION_INIT_TEST_TABLE from the function
908 being inlined and create the boolean variables in the outermost
909 scope of the method being inlined into. */
911 /* Create a mapping from a boolean variable in a method being inlined
912 to one in the scope of the method being inlined into. */
915 merge_init_test_initialization (void **entry, void *x)
917 struct treetreehash_entry *ite = (struct treetreehash_entry *) *entry;
918 splay_tree decl_map = (splay_tree)x;
920 tree *init_test_decl;
922 /* See if we have remapped this declaration. If we haven't there's
923 a bug in the inliner. */
924 n = splay_tree_lookup (decl_map, (splay_tree_key) ite->value);
928 /* Create a new entry for the class and its remapped boolean
929 variable. If we already have a mapping for this class we've
930 already initialized it, so don't overwrite the value. */
931 init_test_decl = java_treetreehash_new
932 (DECL_FUNCTION_INIT_TEST_TABLE (current_function_decl), ite->key);
933 if (!*init_test_decl)
934 *init_test_decl = (tree)n->value;
936 /* This fixes a weird case.
938 The front end assumes that once we have called a method that
939 initializes some class, we can assume the class is initialized. It
940 does this by setting the DECL_INITIAL of the init_test_decl for that
941 class, and no initializations are emitted for that class.
943 However, what if the method that is suppoed to do the initialization
944 is itself inlined in the caller? When expanding the called method
945 we'll assume that the class initialization has already been done,
946 because the DECL_INITIAL of the init_test_decl is set.
948 To fix this we remove the DECL_INITIAL (in the caller scope) of all
949 the init_test_decls corresponding to classes initialized by the
950 inlined method. This makes the caller no longer assume that the
951 method being inlined does any class initializations. */
952 DECL_INITIAL (*init_test_decl) = NULL;
957 /* Merge the DECL_FUNCTION_INIT_TEST_TABLE from the function we're
961 java_inlining_merge_static_initializers (tree fn, void *decl_map)
964 (DECL_FUNCTION_INIT_TEST_TABLE (fn),
965 merge_init_test_initialization, decl_map);
968 /* Lookup a DECL_FUNCTION_INIT_TEST_TABLE entry in the method we're
969 inlining into. If we already have a corresponding entry in that
970 class we don't need to create another one, so we create a mapping
971 from the variable in the inlined class to the corresponding
975 inline_init_test_initialization (void **entry, void *x)
977 struct treetreehash_entry *ite = (struct treetreehash_entry *) *entry;
978 splay_tree decl_map = (splay_tree)x;
980 tree h = java_treetreehash_find
981 (DECL_FUNCTION_INIT_TEST_TABLE (current_function_decl), ite->key);
984 splay_tree_insert (decl_map,
985 (splay_tree_key) ite->value,
986 (splay_tree_value) h);
990 /* Look up the boolean variables in the DECL_FUNCTION_INIT_TEST_TABLE
991 of a method being inlined. For each hone, if we already have a
992 variable associated with the same class in the method being inlined
993 into, create a new mapping for it. */
996 java_inlining_map_static_initializers (tree fn, void *decl_map)
999 (DECL_FUNCTION_INIT_TEST_TABLE (fn),
1000 inline_init_test_initialization, decl_map);
1003 /* Avoid voluminous output for deep recursion of compound exprs. */
1006 dump_compound_expr (dump_info_p di, tree t)
1012 switch (TREE_CODE (TREE_OPERAND (t, i)))
1015 dump_compound_expr (di, TREE_OPERAND (t, i));
1018 case EXPR_WITH_FILE_LOCATION:
1020 tree wfl_node = EXPR_WFL_NODE (TREE_OPERAND (t, i));
1021 dump_child ("expr", wfl_node);
1026 dump_child ("expr", TREE_OPERAND (t, i));
1032 java_dump_tree (void *dump_info, tree t)
1034 enum tree_code code;
1035 dump_info_p di = (dump_info_p) dump_info;
1037 /* Figure out what kind of node this is. */
1038 code = TREE_CODE (t);
1043 dump_child ("args", DECL_ARGUMENTS (t));
1044 if (DECL_EXTERNAL (t))
1045 dump_string (di, "undefined");
1046 if (TREE_PUBLIC (t))
1047 dump_string (di, "extern");
1049 dump_string (di, "static");
1050 if (DECL_LANG_SPECIFIC (t))
1051 dump_child ("body", DECL_FUNCTION_BODY (t));
1052 if (DECL_LANG_SPECIFIC (t) && !dump_flag (di, TDF_SLIM, t))
1053 dump_child ("inline body", DECL_SAVED_TREE (t));
1057 dump_child ("expr", TREE_OPERAND (t, 0));
1061 dump_child ("goto", TREE_OPERAND (t, 0));
1065 dump_child ("label", TREE_OPERAND (t, 0));
1068 case LABELED_BLOCK_EXPR:
1069 dump_child ("label", TREE_OPERAND (t, 0));
1070 dump_child ("block", TREE_OPERAND (t, 1));
1073 case EXIT_BLOCK_EXPR:
1074 dump_child ("block", TREE_OPERAND (t, 0));
1075 dump_child ("val", TREE_OPERAND (t, 1));
1079 if (BLOCK_EXPR_BODY (t))
1081 tree local = BLOCK_VARS (t);
1084 tree next = TREE_CHAIN (local);
1085 dump_child ("var", local);
1090 tree block = BLOCK_EXPR_BODY (t);
1091 dump_child ("body", block);
1092 block = TREE_CHAIN (block);
1098 if (!dump_flag (di, TDF_SLIM, t))
1100 dump_compound_expr (di, t);
1109 /* Java calls can't, in general, be sibcalls because we need an
1110 accurate stack trace in order to guarantee correct operation of
1111 methods such as Class.forName(String) and
1112 SecurityManager.getClassContext(). */
1115 java_decl_ok_for_sibcall (tree decl)
1117 return decl != NULL && DECL_CONTEXT (decl) == output_class;
1120 /* Given a call_expr, try to figure out what its target might be. In
1121 the case of an indirection via the atable, search for the decl. If
1122 the decl is external, we return NULL. If we don't, the optimizer
1123 will replace the indirection with a direct call, which undoes the
1124 purpose of the atable indirection. */
1126 java_get_callee_fndecl (tree call_expr)
1128 tree method, table, element, atable_methods;
1130 HOST_WIDE_INT index;
1132 if (TREE_CODE (call_expr) != CALL_EXPR)
1134 method = TREE_OPERAND (call_expr, 0);
1135 STRIP_NOPS (method);
1136 if (TREE_CODE (method) != ARRAY_REF)
1138 table = TREE_OPERAND (method, 0);
1139 if (! DECL_LANG_SPECIFIC(table)
1140 || !DECL_OWNER (table)
1141 || TYPE_ATABLE_DECL (DECL_OWNER (table)) != table)
1144 atable_methods = TYPE_ATABLE_METHODS (DECL_OWNER (table));
1145 index = TREE_INT_CST_LOW (TREE_OPERAND (method, 1));
1147 /* FIXME: Replace this for loop with a hash table lookup. */
1148 for (element = atable_methods; element; element = TREE_CHAIN (element))
1152 tree purpose = TREE_PURPOSE (element);
1153 if (TREE_CODE (purpose) == FUNCTION_DECL
1154 && ! DECL_EXTERNAL (purpose))
1165 #include "gt-java-lang.h"