1 /* Process expressions for the GNU compiler for the Java(TM) language.
2 Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
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, 51 Franklin Street, Fifth Floor,
20 Boston, MA 02110-1301, 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"
37 #include "java-tree.h"
39 #include "java-opcodes.h"
41 #include "java-except.h"
46 #include "tree-gimple.h"
49 static void flush_quick_stack (void);
50 static void push_value (tree);
51 static tree pop_value (tree);
52 static void java_stack_swap (void);
53 static void java_stack_dup (int, int);
54 static void build_java_athrow (tree);
55 static void build_java_jsr (int, int);
56 static void build_java_ret (tree);
57 static void expand_java_multianewarray (tree, int);
58 static void expand_java_arraystore (tree);
59 static void expand_java_arrayload (tree);
60 static void expand_java_array_length (void);
61 static tree build_java_monitor (tree, tree);
62 static void expand_java_pushc (int, tree);
63 static void expand_java_return (tree);
64 static void expand_load_internal (int, tree, int);
65 static void expand_java_NEW (tree);
66 static void expand_java_INSTANCEOF (tree);
67 static void expand_java_CHECKCAST (tree);
68 static void expand_iinc (unsigned int, int, int);
69 static void expand_java_binop (tree, enum tree_code);
70 static void note_label (int, int);
71 static void expand_compare (enum tree_code, tree, tree, int);
72 static void expand_test (enum tree_code, tree, int);
73 static void expand_cond (enum tree_code, tree, int);
74 static void expand_java_goto (int);
75 static tree expand_java_switch (tree, int);
76 static void expand_java_add_case (tree, int, int);
78 static void expand_java_call (int, int);
79 static void expand_java_ret (tree);
81 static tree pop_arguments (tree);
82 static void expand_invoke (int, int, int);
83 static void expand_java_field_op (int, int, int);
84 static void java_push_constant_from_pool (struct JCF *, int);
85 static void java_stack_pop (int);
86 static tree build_java_throw_out_of_bounds_exception (tree);
87 static tree build_java_check_indexed_type (tree, tree);
88 static unsigned char peek_opcode_at_pc (struct JCF *, int, int);
89 static void promote_arguments (void);
91 static GTY(()) tree operand_type[59];
93 static GTY(()) tree methods_ident;
94 static GTY(()) tree ncode_ident;
95 tree dtable_ident = NULL_TREE;
97 /* Set to nonzero value in order to emit class initialization code
98 before static field references. */
99 int always_initialize_class_p = 0;
101 /* We store the stack state in two places:
102 Within a basic block, we use the quick_stack, which is a
103 pushdown list (TREE_LISTs) of expression nodes.
104 This is the top part of the stack; below that we use find_stack_slot.
105 At the end of a basic block, the quick_stack must be flushed
106 to the stack slot array (as handled by find_stack_slot).
107 Using quick_stack generates better code (especially when
108 compiled without optimization), because we do not have to
109 explicitly store and load trees to temporary variables.
111 If a variable is on the quick stack, it means the value of variable
112 when the quick stack was last flushed. Conceptually, flush_quick_stack
113 saves all the quick_stack elements in parallel. However, that is
114 complicated, so it actually saves them (i.e. copies each stack value
115 to is home virtual register) from low indexes. This allows a quick_stack
116 element at index i (counting from the bottom of stack the) to references
117 slot virtuals for register that are >= i, but not those that are deeper.
118 This convention makes most operations easier. For example iadd works
119 even when the stack contains (reg[0], reg[1]): It results in the
120 stack containing (reg[0]+reg[1]), which is OK. However, some stack
121 operations are more complicated. For example dup given a stack
122 containing (reg[0]) would yield (reg[0], reg[0]), which would violate
123 the convention, since stack value 1 would refer to a register with
124 lower index (reg[0]), which flush_quick_stack does not safely handle.
125 So dup cannot just add an extra element to the quick_stack, but iadd can.
128 static GTY(()) tree quick_stack;
130 /* A free-list of unused permanent TREE_LIST nodes. */
131 static GTY((deletable)) tree tree_list_free_list;
133 /* The physical memory page size used in this computer. See
134 build_field_ref(). */
135 static GTY(()) tree page_size;
137 /* The stack pointer of the Java virtual machine.
138 This does include the size of the quick_stack. */
142 const unsigned char *linenumber_table;
143 int linenumber_count;
145 /* Largest pc so far in this method that has been passed to lookup_label. */
146 int highest_label_pc_this_method = -1;
148 /* Base value for this method to add to pc to get generated label. */
149 int start_label_pc_this_method = 0;
152 init_expr_processing (void)
154 operand_type[21] = operand_type[54] = int_type_node;
155 operand_type[22] = operand_type[55] = long_type_node;
156 operand_type[23] = operand_type[56] = float_type_node;
157 operand_type[24] = operand_type[57] = double_type_node;
158 operand_type[25] = operand_type[58] = ptr_type_node;
162 java_truthvalue_conversion (tree expr)
164 /* It is simpler and generates better code to have only TRUTH_*_EXPR
165 or comparison expressions as truth values at this level.
167 This function should normally be identity for Java. */
169 switch (TREE_CODE (expr))
171 case EQ_EXPR: case NE_EXPR: case UNEQ_EXPR: case LTGT_EXPR:
172 case LE_EXPR: case GE_EXPR: case LT_EXPR: case GT_EXPR:
173 case UNLE_EXPR: case UNGE_EXPR: case UNLT_EXPR: case UNGT_EXPR:
174 case ORDERED_EXPR: case UNORDERED_EXPR:
175 case TRUTH_ANDIF_EXPR:
176 case TRUTH_ORIF_EXPR:
185 return integer_zerop (expr) ? boolean_false_node : boolean_true_node;
188 return real_zerop (expr) ? boolean_false_node : boolean_true_node;
190 /* are these legal? XXX JH */
194 /* These don't change whether an object is nonzero or zero. */
195 return java_truthvalue_conversion (TREE_OPERAND (expr, 0));
198 /* Distribute the conversion into the arms of a COND_EXPR. */
199 return fold_build3 (COND_EXPR, boolean_type_node, TREE_OPERAND (expr, 0),
200 java_truthvalue_conversion (TREE_OPERAND (expr, 1)),
201 java_truthvalue_conversion (TREE_OPERAND (expr, 2)));
204 /* If this is widening the argument, we can ignore it. */
205 if (TYPE_PRECISION (TREE_TYPE (expr))
206 >= TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (expr, 0))))
207 return java_truthvalue_conversion (TREE_OPERAND (expr, 0));
208 /* fall through to default */
211 return fold_build2 (NE_EXPR, boolean_type_node,
212 expr, boolean_false_node);
216 /* Save any stack slots that happen to be in the quick_stack into their
217 home virtual register slots.
219 The copy order is from low stack index to high, to support the invariant
220 that the expression for a slot may contain decls for stack slots with
221 higher (or the same) index, but not lower. */
224 flush_quick_stack (void)
226 int stack_index = stack_pointer;
227 tree prev, cur, next;
229 /* First reverse the quick_stack, and count the number of slots it has. */
230 for (cur = quick_stack, prev = NULL_TREE; cur != NULL_TREE; cur = next)
232 next = TREE_CHAIN (cur);
233 TREE_CHAIN (cur) = prev;
235 stack_index -= 1 + TYPE_IS_WIDE (TREE_TYPE (TREE_VALUE (cur)));
239 while (quick_stack != NULL_TREE)
242 tree node = quick_stack, type;
243 quick_stack = TREE_CHAIN (node);
244 TREE_CHAIN (node) = tree_list_free_list;
245 tree_list_free_list = node;
246 node = TREE_VALUE (node);
247 type = TREE_TYPE (node);
249 decl = find_stack_slot (stack_index, type);
251 java_add_stmt (build2 (MODIFY_EXPR, TREE_TYPE (node), decl, node));
252 stack_index += 1 + TYPE_IS_WIDE (type);
256 /* Push TYPE on the type stack.
257 Return true on success, 0 on overflow. */
260 push_type_0 (tree type)
263 type = promote_type (type);
264 n_words = 1 + TYPE_IS_WIDE (type);
265 if (stack_pointer + n_words > DECL_MAX_STACK (current_function_decl))
267 /* Allocate decl for this variable now, so we get a temporary that
268 survives the whole method. */
269 find_stack_slot (stack_pointer, type);
270 stack_type_map[stack_pointer++] = type;
272 while (--n_words >= 0)
273 stack_type_map[stack_pointer++] = TYPE_SECOND;
278 push_type (tree type)
280 int r = push_type_0 (type);
285 push_value (tree value)
287 tree type = TREE_TYPE (value);
288 if (TYPE_PRECISION (type) < 32 && INTEGRAL_TYPE_P (type))
290 type = promote_type (type);
291 value = convert (type, value);
294 if (tree_list_free_list == NULL_TREE)
295 quick_stack = tree_cons (NULL_TREE, value, quick_stack);
298 tree node = tree_list_free_list;
299 tree_list_free_list = TREE_CHAIN (tree_list_free_list);
300 TREE_VALUE (node) = value;
301 TREE_CHAIN (node) = quick_stack;
306 /* Pop a type from the type stack.
307 TYPE is the expected type. Return the actual type, which must be
309 On an error, *MESSAGEP is set to a freshly malloc'd error message. */
312 pop_type_0 (tree type, char **messagep)
317 if (TREE_CODE (type) == RECORD_TYPE)
318 type = promote_type (type);
319 n_words = 1 + TYPE_IS_WIDE (type);
320 if (stack_pointer < n_words)
322 *messagep = xstrdup ("stack underflow");
325 while (--n_words > 0)
327 if (stack_type_map[--stack_pointer] != void_type_node)
329 *messagep = xstrdup ("Invalid multi-word value on type stack");
333 t = stack_type_map[--stack_pointer];
334 if (type == NULL_TREE || t == type)
336 if (TREE_CODE (t) == TREE_LIST)
340 tree tt = TREE_PURPOSE (t);
341 if (! can_widen_reference_to (tt, type))
351 if (INTEGRAL_TYPE_P (type) && INTEGRAL_TYPE_P (t)
352 && TYPE_PRECISION (type) <= 32 && TYPE_PRECISION (t) <= 32)
354 if (TREE_CODE (type) == POINTER_TYPE && TREE_CODE (t) == POINTER_TYPE)
356 /* If the expected type we've been passed is object or ptr
357 (i.e. void*), the caller needs to know the real type. */
358 if (type == ptr_type_node || type == object_ptr_type_node)
361 /* Since the verifier has already run, we know that any
362 types we see will be compatible. In BC mode, this fact
363 may be checked at runtime, but if that is so then we can
364 assume its truth here as well. So, we always succeed
365 here, with the expected type. */
369 if (! flag_verify_invocations && flag_indirect_dispatch
370 && t == object_ptr_type_node)
372 if (type != ptr_type_node)
373 warning (0, "need to insert runtime check for %s",
374 xstrdup (lang_printable_name (type, 0)));
378 /* lang_printable_name uses a static buffer, so we must save the result
379 from calling it the first time. */
382 char *temp = xstrdup (lang_printable_name (type, 0));
383 /* If the stack contains a multi-word type, keep popping the stack until
384 the real type is found. */
385 while (t == void_type_node)
386 t = stack_type_map[--stack_pointer];
387 *messagep = concat ("expected type '", temp,
388 "' but stack contains '", lang_printable_name (t, 0),
395 /* Pop a type from the type stack.
396 TYPE is the expected type. Return the actual type, which must be
397 convertible to TYPE, otherwise call error. */
402 char *message = NULL;
403 type = pop_type_0 (type, &message);
406 error ("%s", message);
413 /* Return true if two type assertions are equal. */
416 type_assertion_eq (const void * k1_p, const void * k2_p)
418 type_assertion k1 = *(type_assertion *)k1_p;
419 type_assertion k2 = *(type_assertion *)k2_p;
420 return (k1.assertion_code == k2.assertion_code
422 && k1.op2 == k2.op2);
425 /* Hash a type assertion. */
428 type_assertion_hash (const void *p)
430 const type_assertion *k_p = p;
431 hashval_t hash = iterative_hash (&k_p->assertion_code, sizeof
432 k_p->assertion_code, 0);
433 hash = iterative_hash (&k_p->op1, sizeof k_p->op1, hash);
434 return iterative_hash (&k_p->op2, sizeof k_p->op2, hash);
437 /* Add an entry to the type assertion table for the given class.
438 CLASS is the class for which this assertion will be evaluated by the
439 runtime during loading/initialization.
440 ASSERTION_CODE is the 'opcode' or type of this assertion: see java-tree.h.
441 OP1 and OP2 are the operands. The tree type of these arguments may be
442 specific to each assertion_code. */
445 add_type_assertion (tree class, int assertion_code, tree op1, tree op2)
447 htab_t assertions_htab;
451 assertions_htab = TYPE_ASSERTIONS (class);
452 if (assertions_htab == NULL)
454 assertions_htab = htab_create_ggc (7, type_assertion_hash,
455 type_assertion_eq, NULL);
456 TYPE_ASSERTIONS (current_class) = assertions_htab;
459 as.assertion_code = assertion_code;
463 as_pp = htab_find_slot (assertions_htab, &as, INSERT);
465 /* Don't add the same assertion twice. */
469 *as_pp = ggc_alloc (sizeof (type_assertion));
470 **(type_assertion **)as_pp = as;
474 /* Return 1 if SOURCE_TYPE can be safely widened to TARGET_TYPE.
475 Handles array types and interfaces. */
478 can_widen_reference_to (tree source_type, tree target_type)
480 if (source_type == ptr_type_node || target_type == object_ptr_type_node)
483 /* Get rid of pointers */
484 if (TREE_CODE (source_type) == POINTER_TYPE)
485 source_type = TREE_TYPE (source_type);
486 if (TREE_CODE (target_type) == POINTER_TYPE)
487 target_type = TREE_TYPE (target_type);
489 if (source_type == target_type)
492 /* FIXME: This is very pessimistic, in that it checks everything,
493 even if we already know that the types are compatible. If we're
494 to support full Java class loader semantics, we need this.
495 However, we could do something more optimal. */
496 if (! flag_verify_invocations)
498 add_type_assertion (current_class, JV_ASSERT_TYPES_COMPATIBLE,
499 source_type, target_type);
502 warning (0, "assert: %s is assign compatible with %s",
503 xstrdup (lang_printable_name (target_type, 0)),
504 xstrdup (lang_printable_name (source_type, 0)));
505 /* Punt everything to runtime. */
509 if (TYPE_DUMMY (source_type) || TYPE_DUMMY (target_type))
515 if (TYPE_ARRAY_P (source_type) || TYPE_ARRAY_P (target_type))
517 HOST_WIDE_INT source_length, target_length;
518 if (TYPE_ARRAY_P (source_type) != TYPE_ARRAY_P (target_type))
520 /* An array implements Cloneable and Serializable. */
521 tree name = DECL_NAME (TYPE_NAME (target_type));
522 return (name == java_lang_cloneable_identifier_node
523 || name == java_io_serializable_identifier_node);
525 target_length = java_array_type_length (target_type);
526 if (target_length >= 0)
528 source_length = java_array_type_length (source_type);
529 if (source_length != target_length)
532 source_type = TYPE_ARRAY_ELEMENT (source_type);
533 target_type = TYPE_ARRAY_ELEMENT (target_type);
534 if (source_type == target_type)
536 if (TREE_CODE (source_type) != POINTER_TYPE
537 || TREE_CODE (target_type) != POINTER_TYPE)
539 return can_widen_reference_to (source_type, target_type);
543 int source_depth = class_depth (source_type);
544 int target_depth = class_depth (target_type);
546 if (TYPE_DUMMY (source_type) || TYPE_DUMMY (target_type))
549 warning (0, "assert: %s is assign compatible with %s",
550 xstrdup (lang_printable_name (target_type, 0)),
551 xstrdup (lang_printable_name (source_type, 0)));
555 /* class_depth can return a negative depth if an error occurred */
556 if (source_depth < 0 || target_depth < 0)
559 if (CLASS_INTERFACE (TYPE_NAME (target_type)))
561 /* target_type is OK if source_type or source_type ancestors
562 implement target_type. We handle multiple sub-interfaces */
563 tree binfo, base_binfo;
566 for (binfo = TYPE_BINFO (source_type), i = 0;
567 BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
568 if (can_widen_reference_to
569 (BINFO_TYPE (base_binfo), target_type))
576 for ( ; source_depth > target_depth; source_depth--)
579 = BINFO_TYPE (BINFO_BASE_BINFO (TYPE_BINFO (source_type), 0));
581 return source_type == target_type;
587 pop_value (tree type)
589 type = pop_type (type);
592 tree node = quick_stack;
593 quick_stack = TREE_CHAIN (quick_stack);
594 TREE_CHAIN (node) = tree_list_free_list;
595 tree_list_free_list = node;
596 node = TREE_VALUE (node);
600 return find_stack_slot (stack_pointer, promote_type (type));
604 /* Pop and discard the top COUNT stack slots. */
607 java_stack_pop (int count)
613 gcc_assert (stack_pointer != 0);
615 type = stack_type_map[stack_pointer - 1];
616 if (type == TYPE_SECOND)
619 gcc_assert (stack_pointer != 1 && count > 0);
621 type = stack_type_map[stack_pointer - 2];
623 val = pop_value (type);
628 /* Implement the 'swap' operator (to swap two top stack slots). */
631 java_stack_swap (void)
637 if (stack_pointer < 2
638 || (type1 = stack_type_map[stack_pointer - 1]) == TYPE_UNKNOWN
639 || (type2 = stack_type_map[stack_pointer - 2]) == TYPE_UNKNOWN
640 || type1 == TYPE_SECOND || type2 == TYPE_SECOND
641 || TYPE_IS_WIDE (type1) || TYPE_IS_WIDE (type2))
642 /* Bad stack swap. */
644 /* Bad stack swap. */
646 flush_quick_stack ();
647 decl1 = find_stack_slot (stack_pointer - 1, type1);
648 decl2 = find_stack_slot (stack_pointer - 2, type2);
649 temp = build_decl (VAR_DECL, NULL_TREE, type1);
650 java_add_local_var (temp);
651 java_add_stmt (build2 (MODIFY_EXPR, type1, temp, decl1));
652 java_add_stmt (build2 (MODIFY_EXPR, type2,
653 find_stack_slot (stack_pointer - 1, type2),
655 java_add_stmt (build2 (MODIFY_EXPR, type1,
656 find_stack_slot (stack_pointer - 2, type1),
658 stack_type_map[stack_pointer - 1] = type2;
659 stack_type_map[stack_pointer - 2] = type1;
663 java_stack_dup (int size, int offset)
665 int low_index = stack_pointer - size - offset;
668 error ("stack underflow - dup* operation");
670 flush_quick_stack ();
672 stack_pointer += size;
673 dst_index = stack_pointer;
675 for (dst_index = stack_pointer; --dst_index >= low_index; )
678 int src_index = dst_index - size;
679 if (src_index < low_index)
680 src_index = dst_index + size + offset;
681 type = stack_type_map [src_index];
682 if (type == TYPE_SECOND)
684 /* Dup operation splits 64-bit number. */
685 gcc_assert (src_index > low_index);
687 stack_type_map[dst_index] = type;
688 src_index--; dst_index--;
689 type = stack_type_map[src_index];
690 gcc_assert (TYPE_IS_WIDE (type));
693 gcc_assert (! TYPE_IS_WIDE (type));
695 if (src_index != dst_index)
697 tree src_decl = find_stack_slot (src_index, type);
698 tree dst_decl = find_stack_slot (dst_index, type);
701 (build2 (MODIFY_EXPR, TREE_TYPE (dst_decl), dst_decl, src_decl));
702 stack_type_map[dst_index] = type;
707 /* Calls _Jv_Throw or _Jv_Sjlj_Throw. Discard the contents of the
711 build_java_athrow (tree node)
715 call = build3 (CALL_EXPR,
717 build_address_of (throw_node),
718 build_tree_list (NULL_TREE, node),
720 TREE_SIDE_EFFECTS (call) = 1;
721 java_add_stmt (call);
722 java_stack_pop (stack_pointer);
725 /* Implementation for jsr/ret */
728 build_java_jsr (int target_pc, int return_pc)
730 tree where = lookup_label (target_pc);
731 tree ret = lookup_label (return_pc);
732 tree ret_label = fold_build1 (ADDR_EXPR, return_address_type_node, ret);
733 push_value (ret_label);
734 flush_quick_stack ();
735 java_add_stmt (build1 (GOTO_EXPR, void_type_node, where));
737 /* Do not need to emit the label here. We noted the existence of the
738 label as a jump target in note_instructions; we'll emit the label
739 for real at the beginning of the expand_byte_code loop. */
743 build_java_ret (tree location)
745 java_add_stmt (build1 (GOTO_EXPR, void_type_node, location));
748 /* Implementation of operations on array: new, load, store, length */
751 decode_newarray_type (int atype)
755 case 4: return boolean_type_node;
756 case 5: return char_type_node;
757 case 6: return float_type_node;
758 case 7: return double_type_node;
759 case 8: return byte_type_node;
760 case 9: return short_type_node;
761 case 10: return int_type_node;
762 case 11: return long_type_node;
763 default: return NULL_TREE;
767 /* Map primitive type to the code used by OPCODE_newarray. */
770 encode_newarray_type (tree type)
772 if (type == boolean_type_node)
774 else if (type == char_type_node)
776 else if (type == float_type_node)
778 else if (type == double_type_node)
780 else if (type == byte_type_node)
782 else if (type == short_type_node)
784 else if (type == int_type_node)
786 else if (type == long_type_node)
792 /* Build a call to _Jv_ThrowBadArrayIndex(), the
793 ArrayIndexOfBoundsException exception handler. */
796 build_java_throw_out_of_bounds_exception (tree index)
798 tree node = build3 (CALL_EXPR, int_type_node,
799 build_address_of (soft_badarrayindex_node),
800 build_tree_list (NULL_TREE, index), NULL_TREE);
801 TREE_SIDE_EFFECTS (node) = 1; /* Allows expansion within ANDIF */
805 /* Return the length of an array. Doesn't perform any checking on the nature
806 or value of the array NODE. May be used to implement some bytecodes. */
809 build_java_array_length_access (tree node)
811 tree type = TREE_TYPE (node);
812 tree array_type = TREE_TYPE (type);
813 HOST_WIDE_INT length;
815 if (!is_array_type_p (type))
817 /* With the new verifier, we will see an ordinary pointer type
818 here. In this case, we just use an arbitrary array type. */
819 array_type = build_java_array_type (object_ptr_type_node, -1);
820 type = promote_type (array_type);
823 length = java_array_type_length (type);
825 return build_int_cst (NULL_TREE, length);
827 node = build3 (COMPONENT_REF, int_type_node,
828 build_java_indirect_ref (array_type, node,
829 flag_check_references),
830 lookup_field (&array_type, get_identifier ("length")),
832 IS_ARRAY_LENGTH_ACCESS (node) = 1;
836 /* Optionally checks a reference against the NULL pointer. ARG1: the
837 expr, ARG2: we should check the reference. Don't generate extra
838 checks if we're not generating code. */
841 java_check_reference (tree expr, int check)
843 if (!flag_syntax_only && check)
845 expr = save_expr (expr);
846 expr = build3 (COND_EXPR, TREE_TYPE (expr),
847 build2 (EQ_EXPR, boolean_type_node,
848 expr, null_pointer_node),
849 build3 (CALL_EXPR, void_type_node,
850 build_address_of (soft_nullpointer_node),
851 NULL_TREE, NULL_TREE),
858 /* Reference an object: just like an INDIRECT_REF, but with checking. */
861 build_java_indirect_ref (tree type, tree expr, int check)
864 t = java_check_reference (expr, check);
865 t = convert (build_pointer_type (type), t);
866 return build1 (INDIRECT_REF, type, t);
869 /* Implement array indexing (either as l-value or r-value).
870 Returns a tree for ARRAY[INDEX], assume TYPE is the element type.
871 Optionally performs bounds checking and/or test to NULL.
872 At this point, ARRAY should have been verified as an array. */
875 build_java_arrayaccess (tree array, tree type, tree index)
877 tree node, throw = NULL_TREE;
880 tree array_type = TREE_TYPE (TREE_TYPE (array));
882 if (!is_array_type_p (TREE_TYPE (array)))
884 /* With the new verifier, we will see an ordinary pointer type
885 here. In this case, we just use the correct array type. */
886 array_type = build_java_array_type (type, -1);
889 if (flag_bounds_check)
892 * (unsigned jint) INDEX >= (unsigned jint) LEN
893 * && throw ArrayIndexOutOfBoundsException.
894 * Note this is equivalent to and more efficient than:
895 * INDEX < 0 || INDEX >= LEN && throw ... */
897 tree len = convert (unsigned_int_type_node,
898 build_java_array_length_access (array));
899 test = fold_build2 (GE_EXPR, boolean_type_node,
900 convert (unsigned_int_type_node, index),
902 if (! integer_zerop (test))
904 throw = build2 (TRUTH_ANDIF_EXPR, int_type_node, test,
905 build_java_throw_out_of_bounds_exception (index));
906 /* allows expansion within COMPOUND */
907 TREE_SIDE_EFFECTS( throw ) = 1;
911 /* If checking bounds, wrap the index expr with a COMPOUND_EXPR in order
912 to have the bounds check evaluated first. */
913 if (throw != NULL_TREE)
914 index = build2 (COMPOUND_EXPR, int_type_node, throw, index);
916 data_field = lookup_field (&array_type, get_identifier ("data"));
918 ref = build3 (COMPONENT_REF, TREE_TYPE (data_field),
919 build_java_indirect_ref (array_type, array,
920 flag_check_references),
921 data_field, NULL_TREE);
923 node = build4 (ARRAY_REF, type, ref, index, NULL_TREE, NULL_TREE);
927 /* Generate code to throw an ArrayStoreException if OBJECT is not assignable
928 (at runtime) to an element of ARRAY. A NOP_EXPR is returned if it can
929 determine that no check is required. */
932 build_java_arraystore_check (tree array, tree object)
934 tree check, element_type, source;
935 tree array_type_p = TREE_TYPE (array);
936 tree object_type = TYPE_NAME (TREE_TYPE (TREE_TYPE (object)));
938 if (! flag_verify_invocations)
940 /* With the new verifier, we don't track precise types. FIXME:
941 performance regression here. */
942 element_type = TYPE_NAME (object_type_node);
946 gcc_assert (is_array_type_p (array_type_p));
948 /* Get the TYPE_DECL for ARRAY's element type. */
950 = TYPE_NAME (TREE_TYPE (TREE_TYPE (TREE_TYPE (array_type_p))));
953 gcc_assert (TREE_CODE (element_type) == TYPE_DECL
954 && TREE_CODE (object_type) == TYPE_DECL);
956 if (!flag_store_check)
957 return build1 (NOP_EXPR, array_type_p, array);
959 /* No check is needed if the element type is final. Also check that
960 element_type matches object_type, since in the bytecode
961 compilation case element_type may be the actual element type of
962 the array rather than its declared type. However, if we're doing
963 indirect dispatch, we can't do the `final' optimization. */
964 if (element_type == object_type
965 && ! flag_indirect_dispatch
966 && CLASS_FINAL (element_type))
967 return build1 (NOP_EXPR, array_type_p, array);
969 /* OBJECT might be wrapped by a SAVE_EXPR. */
970 if (TREE_CODE (object) == SAVE_EXPR)
971 source = TREE_OPERAND (object, 0);
975 /* Avoid the check if OBJECT was just loaded from the same array. */
976 if (TREE_CODE (source) == ARRAY_REF)
979 source = TREE_OPERAND (source, 0); /* COMPONENT_REF. */
980 source = TREE_OPERAND (source, 0); /* INDIRECT_REF. */
981 source = TREE_OPERAND (source, 0); /* Source array's DECL or SAVE_EXPR. */
982 if (TREE_CODE (source) == SAVE_EXPR)
983 source = TREE_OPERAND (source, 0);
986 if (TREE_CODE (target) == SAVE_EXPR)
987 target = TREE_OPERAND (target, 0);
989 if (source == target)
990 return build1 (NOP_EXPR, array_type_p, array);
993 /* Build an invocation of _Jv_CheckArrayStore */
994 check = build3 (CALL_EXPR, void_type_node,
995 build_address_of (soft_checkarraystore_node),
996 tree_cons (NULL_TREE, array,
997 build_tree_list (NULL_TREE, object)),
999 TREE_SIDE_EFFECTS (check) = 1;
1004 /* Makes sure that INDEXED_TYPE is appropriate. If not, make it from
1005 ARRAY_NODE. This function is used to retrieve something less vague than
1006 a pointer type when indexing the first dimension of something like [[<t>.
1007 May return a corrected type, if necessary, otherwise INDEXED_TYPE is
1008 return unchanged. */
1011 build_java_check_indexed_type (tree array_node ATTRIBUTE_UNUSED,
1014 /* We used to check to see if ARRAY_NODE really had array type.
1015 However, with the new verifier, this is not necessary, as we know
1016 that the object will be an array of the appropriate type. */
1018 return indexed_type;
1021 /* newarray triggers a call to _Jv_NewPrimArray. This function should be
1022 called with an integer code (the type of array to create), and the length
1023 of the array to create. */
1026 build_newarray (int atype_value, tree length)
1030 tree prim_type = decode_newarray_type (atype_value);
1032 = build_java_array_type (prim_type,
1033 host_integerp (length, 0) == INTEGER_CST
1034 ? tree_low_cst (length, 0) : -1);
1036 /* If compiling to native, pass a reference to the primitive type class
1037 and save the runtime some work. However, the bytecode generator
1038 expects to find the type_code int here. */
1039 if (flag_emit_class_files)
1040 type_arg = build_int_cst (NULL_TREE, atype_value);
1042 type_arg = build_class_ref (prim_type);
1044 return build3 (CALL_EXPR, promote_type (type),
1045 build_address_of (soft_newarray_node),
1046 tree_cons (NULL_TREE,
1048 build_tree_list (NULL_TREE, length)),
1052 /* Generates anewarray from a given CLASS_TYPE. Gets from the stack the size
1053 of the dimension. */
1056 build_anewarray (tree class_type, tree length)
1059 = build_java_array_type (class_type,
1060 host_integerp (length, 0)
1061 ? tree_low_cst (length, 0) : -1);
1063 return build3 (CALL_EXPR, promote_type (type),
1064 build_address_of (soft_anewarray_node),
1065 tree_cons (NULL_TREE, length,
1066 tree_cons (NULL_TREE, build_class_ref (class_type),
1067 build_tree_list (NULL_TREE,
1068 null_pointer_node))),
1072 /* Return a node the evaluates 'new TYPE[LENGTH]'. */
1075 build_new_array (tree type, tree length)
1077 if (JPRIMITIVE_TYPE_P (type))
1078 return build_newarray (encode_newarray_type (type), length);
1080 return build_anewarray (TREE_TYPE (type), length);
1083 /* Generates a call to _Jv_NewMultiArray. multianewarray expects a
1084 class pointer, a number of dimensions and the matching number of
1085 dimensions. The argument list is NULL terminated. */
1088 expand_java_multianewarray (tree class_type, int ndim)
1091 tree args = build_tree_list( NULL_TREE, null_pointer_node );
1093 for( i = 0; i < ndim; i++ )
1094 args = tree_cons (NULL_TREE, pop_value (int_type_node), args);
1096 push_value (build3 (CALL_EXPR,
1097 promote_type (class_type),
1098 build_address_of (soft_multianewarray_node),
1099 tree_cons (NULL_TREE, build_class_ref (class_type),
1100 tree_cons (NULL_TREE,
1101 build_int_cst (NULL_TREE, ndim),
1106 /* ARRAY[INDEX] <- RHS. build_java_check_indexed_type makes sure that
1107 ARRAY is an array type. May expand some bound checking and NULL
1108 pointer checking. RHS_TYPE_NODE we are going to store. In the case
1109 of the CHAR/BYTE/BOOLEAN SHORT, the type popped of the stack is an
1110 INT. In those cases, we make the conversion.
1112 if ARRAy is a reference type, the assignment is checked at run-time
1113 to make sure that the RHS can be assigned to the array element
1114 type. It is not necessary to generate this code if ARRAY is final. */
1117 expand_java_arraystore (tree rhs_type_node)
1119 tree rhs_node = pop_value ((INTEGRAL_TYPE_P (rhs_type_node)
1120 && TYPE_PRECISION (rhs_type_node) <= 32) ?
1121 int_type_node : rhs_type_node);
1122 tree index = pop_value (int_type_node);
1123 tree array_type, array;
1125 /* If we're processing an `aaload' we might as well just pick
1127 if (TREE_CODE (rhs_type_node) == POINTER_TYPE)
1129 array_type = build_java_array_type (object_ptr_type_node, -1);
1130 rhs_type_node = object_ptr_type_node;
1133 array_type = build_java_array_type (rhs_type_node, -1);
1135 array = pop_value (array_type);
1136 array = build1 (NOP_EXPR, promote_type (array_type), array);
1138 rhs_type_node = build_java_check_indexed_type (array, rhs_type_node);
1140 flush_quick_stack ();
1142 index = save_expr (index);
1143 array = save_expr (array);
1145 if (TREE_CODE (rhs_type_node) == POINTER_TYPE)
1147 tree check = build_java_arraystore_check (array, rhs_node);
1148 java_add_stmt (check);
1151 array = build_java_arrayaccess (array, rhs_type_node, index);
1152 java_add_stmt (build2 (MODIFY_EXPR, TREE_TYPE (array), array, rhs_node));
1155 /* Expand the evaluation of ARRAY[INDEX]. build_java_check_indexed_type makes
1156 sure that LHS is an array type. May expand some bound checking and NULL
1158 LHS_TYPE_NODE is the type of ARRAY[INDEX]. But in the case of CHAR/BYTE/
1159 BOOLEAN/SHORT, we push a promoted type back to the stack.
1163 expand_java_arrayload (tree lhs_type_node)
1166 tree index_node = pop_value (int_type_node);
1170 /* If we're processing an `aaload' we might as well just pick
1172 if (TREE_CODE (lhs_type_node) == POINTER_TYPE)
1174 array_type = build_java_array_type (object_ptr_type_node, -1);
1175 lhs_type_node = object_ptr_type_node;
1178 array_type = build_java_array_type (lhs_type_node, -1);
1179 array_node = pop_value (array_type);
1180 array_node = build1 (NOP_EXPR, promote_type (array_type), array_node);
1182 index_node = save_expr (index_node);
1183 array_node = save_expr (array_node);
1185 lhs_type_node = build_java_check_indexed_type (array_node,
1187 load_node = build_java_arrayaccess (array_node,
1190 if (INTEGRAL_TYPE_P (lhs_type_node) && TYPE_PRECISION (lhs_type_node) <= 32)
1191 load_node = fold_build1 (NOP_EXPR, int_type_node, load_node);
1192 push_value (load_node);
1195 /* Expands .length. Makes sure that we deal with and array and may expand
1196 a NULL check on the array object. */
1199 expand_java_array_length (void)
1201 tree array = pop_value (ptr_type_node);
1202 tree length = build_java_array_length_access (array);
1204 push_value (length);
1207 /* Emit code for the call to _Jv_Monitor{Enter,Exit}. CALL can be
1208 either soft_monitorenter_node or soft_monitorexit_node. */
1211 build_java_monitor (tree call, tree object)
1213 return build3 (CALL_EXPR,
1215 build_address_of (call),
1216 build_tree_list (NULL_TREE, object),
1220 /* Emit code for one of the PUSHC instructions. */
1223 expand_java_pushc (int ival, tree type)
1226 if (type == ptr_type_node && ival == 0)
1227 value = null_pointer_node;
1228 else if (type == int_type_node || type == long_type_node)
1229 value = build_int_cst (type, ival);
1230 else if (type == float_type_node || type == double_type_node)
1233 REAL_VALUE_FROM_INT (x, ival, 0, TYPE_MODE (type));
1234 value = build_real (type, x);
1243 expand_java_return (tree type)
1245 if (type == void_type_node)
1246 java_add_stmt (build1 (RETURN_EXPR, void_type_node, NULL));
1249 tree retval = pop_value (type);
1250 tree res = DECL_RESULT (current_function_decl);
1251 retval = build2 (MODIFY_EXPR, TREE_TYPE (res), res, retval);
1253 /* Handle the situation where the native integer type is smaller
1254 than the JVM integer. It can happen for many cross compilers.
1255 The whole if expression just goes away if INT_TYPE_SIZE < 32
1257 if (INT_TYPE_SIZE < 32
1258 && (GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (res)))
1259 < GET_MODE_SIZE (TYPE_MODE (type))))
1260 retval = build1(NOP_EXPR, TREE_TYPE(res), retval);
1262 TREE_SIDE_EFFECTS (retval) = 1;
1263 java_add_stmt (build1 (RETURN_EXPR, TREE_TYPE (retval), retval));
1268 expand_load_internal (int index, tree type, int pc)
1271 tree var = find_local_variable (index, type, pc);
1273 /* Now VAR is the VAR_DECL (or PARM_DECL) that we are going to push
1274 on the stack. If there is an assignment to this VAR_DECL between
1275 the stack push and the use, then the wrong code could be
1276 generated. To avoid this we create a new local and copy our
1277 value into it. Then we push this new local on the stack.
1278 Hopefully this all gets optimized out. */
1279 copy = build_decl (VAR_DECL, NULL_TREE, type);
1280 if ((INTEGRAL_TYPE_P (type) || POINTER_TYPE_P (type))
1281 && TREE_TYPE (copy) != TREE_TYPE (var))
1282 var = convert (type, var);
1283 java_add_local_var (copy);
1284 java_add_stmt (build2 (MODIFY_EXPR, TREE_TYPE (var), copy, var));
1290 build_address_of (tree value)
1292 return build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (value)), value);
1296 class_has_finalize_method (tree type)
1298 tree super = CLASSTYPE_SUPER (type);
1300 if (super == NULL_TREE)
1301 return false; /* Every class with a real finalizer inherits */
1302 /* from java.lang.Object. */
1304 return HAS_FINALIZER_P (type) || class_has_finalize_method (super);
1308 java_create_object (tree type)
1310 tree alloc_node = (class_has_finalize_method (type)
1312 : alloc_no_finalizer_node);
1314 return build3 (CALL_EXPR, promote_type (type),
1315 build_address_of (alloc_node),
1316 build_tree_list (NULL_TREE, build_class_ref (type)),
1321 expand_java_NEW (tree type)
1325 alloc_node = (class_has_finalize_method (type) ? alloc_object_node
1326 : alloc_no_finalizer_node);
1327 if (! CLASS_LOADED_P (type))
1328 load_class (type, 1);
1329 safe_layout_class (type);
1330 push_value (build3 (CALL_EXPR, promote_type (type),
1331 build_address_of (alloc_node),
1332 build_tree_list (NULL_TREE, build_class_ref (type)),
1336 /* This returns an expression which will extract the class of an
1340 build_get_class (tree value)
1342 tree class_field = lookup_field (&dtable_type, get_identifier ("class"));
1343 tree vtable_field = lookup_field (&object_type_node,
1344 get_identifier ("vtable"));
1345 tree tmp = build3 (COMPONENT_REF, dtable_ptr_type,
1346 build_java_indirect_ref (object_type_node, value,
1347 flag_check_references),
1348 vtable_field, NULL_TREE);
1349 return build3 (COMPONENT_REF, class_ptr_type,
1350 build1 (INDIRECT_REF, dtable_type, tmp),
1351 class_field, NULL_TREE);
1354 /* This builds the tree representation of the `instanceof' operator.
1355 It tries various tricks to optimize this in cases where types are
1359 build_instanceof (tree value, tree type)
1362 tree itype = TREE_TYPE (TREE_TYPE (soft_instanceof_node));
1363 tree valtype = TREE_TYPE (TREE_TYPE (value));
1364 tree valclass = TYPE_NAME (valtype);
1367 /* When compiling from bytecode, we need to ensure that TYPE has
1369 if (CLASS_P (type) && ! CLASS_LOADED_P (type))
1371 load_class (type, 1);
1372 safe_layout_class (type);
1373 if (! TYPE_SIZE (type) || TREE_CODE (TYPE_SIZE (type)) == ERROR_MARK)
1374 return error_mark_node;
1376 klass = TYPE_NAME (type);
1378 if (type == object_type_node || inherits_from_p (valtype, type))
1380 /* Anything except `null' is an instance of Object. Likewise,
1381 if the object is known to be an instance of the class, then
1382 we only need to check for `null'. */
1383 expr = build2 (NE_EXPR, itype, value, null_pointer_node);
1385 else if (flag_verify_invocations
1386 && ! TYPE_ARRAY_P (type)
1387 && ! TYPE_ARRAY_P (valtype)
1388 && DECL_P (klass) && DECL_P (valclass)
1389 && ! CLASS_INTERFACE (valclass)
1390 && ! CLASS_INTERFACE (klass)
1391 && ! inherits_from_p (type, valtype)
1392 && (CLASS_FINAL (klass)
1393 || ! inherits_from_p (valtype, type)))
1395 /* The classes are from different branches of the derivation
1396 tree, so we immediately know the answer. */
1397 expr = boolean_false_node;
1399 else if (DECL_P (klass) && CLASS_FINAL (klass))
1401 tree save = save_expr (value);
1402 expr = build3 (COND_EXPR, itype,
1403 build2 (NE_EXPR, boolean_type_node,
1404 save, null_pointer_node),
1405 build2 (EQ_EXPR, itype,
1406 build_get_class (save),
1407 build_class_ref (type)),
1408 boolean_false_node);
1412 expr = build3 (CALL_EXPR, itype,
1413 build_address_of (soft_instanceof_node),
1414 tree_cons (NULL_TREE, value,
1415 build_tree_list (NULL_TREE,
1416 build_class_ref (type))),
1419 TREE_SIDE_EFFECTS (expr) = TREE_SIDE_EFFECTS (value);
1424 expand_java_INSTANCEOF (tree type)
1426 tree value = pop_value (object_ptr_type_node);
1427 value = build_instanceof (value, type);
1432 expand_java_CHECKCAST (tree type)
1434 tree value = pop_value (ptr_type_node);
1435 value = build3 (CALL_EXPR, promote_type (type),
1436 build_address_of (soft_checkcast_node),
1437 tree_cons (NULL_TREE, build_class_ref (type),
1438 build_tree_list (NULL_TREE, value)),
1444 expand_iinc (unsigned int local_var_index, int ival, int pc)
1446 tree local_var, res;
1447 tree constant_value;
1449 flush_quick_stack ();
1450 local_var = find_local_variable (local_var_index, int_type_node, pc);
1451 constant_value = build_int_cst (NULL_TREE, ival);
1452 res = fold_build2 (PLUS_EXPR, int_type_node, local_var, constant_value);
1453 java_add_stmt (build2 (MODIFY_EXPR, TREE_TYPE (local_var), local_var, res));
1458 build_java_soft_divmod (enum tree_code op, tree type, tree op1, tree op2)
1461 tree arg1 = convert (type, op1);
1462 tree arg2 = convert (type, op2);
1464 if (type == int_type_node)
1468 case TRUNC_DIV_EXPR:
1469 call = soft_idiv_node;
1471 case TRUNC_MOD_EXPR:
1472 call = soft_irem_node;
1478 else if (type == long_type_node)
1482 case TRUNC_DIV_EXPR:
1483 call = soft_ldiv_node;
1485 case TRUNC_MOD_EXPR:
1486 call = soft_lrem_node;
1494 call = build3 (CALL_EXPR, type,
1495 build_address_of (call),
1496 tree_cons (NULL_TREE, arg1,
1497 build_tree_list (NULL_TREE, arg2)),
1504 build_java_binop (enum tree_code op, tree type, tree arg1, tree arg2)
1511 tree u_type = java_unsigned_type (type);
1512 arg1 = convert (u_type, arg1);
1513 arg1 = build_java_binop (RSHIFT_EXPR, u_type, arg1, arg2);
1514 return convert (type, arg1);
1518 mask = build_int_cst (NULL_TREE,
1519 TYPE_PRECISION (TREE_TYPE (arg1)) - 1);
1520 arg2 = fold_build2 (BIT_AND_EXPR, int_type_node, arg2, mask);
1523 case COMPARE_L_EXPR: /* arg1 > arg2 ? 1 : arg1 == arg2 ? 0 : -1 */
1524 case COMPARE_G_EXPR: /* arg1 < arg2 ? -1 : arg1 == arg2 ? 0 : 1 */
1525 arg1 = save_expr (arg1); arg2 = save_expr (arg2);
1527 tree ifexp1 = fold_build2 (op == COMPARE_L_EXPR ? GT_EXPR : LT_EXPR,
1528 boolean_type_node, arg1, arg2);
1529 tree ifexp2 = fold_build2 (EQ_EXPR, boolean_type_node, arg1, arg2);
1530 tree second_compare = fold_build3 (COND_EXPR, int_type_node,
1531 ifexp2, integer_zero_node,
1532 op == COMPARE_L_EXPR
1533 ? integer_minus_one_node
1534 : integer_one_node);
1535 return fold_build3 (COND_EXPR, int_type_node, ifexp1,
1536 op == COMPARE_L_EXPR ? integer_one_node
1537 : integer_minus_one_node,
1541 arg1 = save_expr (arg1); arg2 = save_expr (arg2);
1543 tree ifexp1 = fold_build2 (LT_EXPR, boolean_type_node, arg1, arg2);
1544 tree ifexp2 = fold_build2 (GT_EXPR, boolean_type_node, arg1, arg2);
1545 tree second_compare = fold_build3 (COND_EXPR, int_type_node,
1546 ifexp2, integer_one_node,
1548 return fold_build3 (COND_EXPR, int_type_node,
1549 ifexp1, integer_minus_one_node, second_compare);
1551 case TRUNC_DIV_EXPR:
1552 case TRUNC_MOD_EXPR:
1553 if (TREE_CODE (type) == REAL_TYPE
1554 && op == TRUNC_MOD_EXPR)
1557 if (type != double_type_node)
1559 arg1 = convert (double_type_node, arg1);
1560 arg2 = convert (double_type_node, arg2);
1562 call = build3 (CALL_EXPR, double_type_node,
1563 build_address_of (soft_fmod_node),
1564 tree_cons (NULL_TREE, arg1,
1565 build_tree_list (NULL_TREE, arg2)),
1567 if (type != double_type_node)
1568 call = convert (type, call);
1572 if (TREE_CODE (type) == INTEGER_TYPE
1573 && flag_use_divide_subroutine
1574 && ! flag_syntax_only)
1575 return build_java_soft_divmod (op, type, arg1, arg2);
1580 return fold_build2 (op, type, arg1, arg2);
1584 expand_java_binop (tree type, enum tree_code op)
1594 rtype = int_type_node;
1595 rarg = pop_value (rtype);
1598 rarg = pop_value (rtype);
1600 larg = pop_value (ltype);
1601 push_value (build_java_binop (op, type, larg, rarg));
1604 /* Lookup the field named NAME in *TYPEP or its super classes.
1605 If not found, return NULL_TREE.
1606 (If the *TYPEP is not found, or if the field reference is
1607 ambiguous, return error_mark_node.)
1608 If found, return the FIELD_DECL, and set *TYPEP to the
1609 class containing the field. */
1612 lookup_field (tree *typep, tree name)
1614 if (CLASS_P (*typep) && !CLASS_LOADED_P (*typep))
1616 load_class (*typep, 1);
1617 safe_layout_class (*typep);
1618 if (!TYPE_SIZE (*typep) || TREE_CODE (TYPE_SIZE (*typep)) == ERROR_MARK)
1619 return error_mark_node;
1623 tree field, binfo, base_binfo;
1627 for (field = TYPE_FIELDS (*typep); field; field = TREE_CHAIN (field))
1628 if (DECL_NAME (field) == name)
1631 /* Process implemented interfaces. */
1632 save_field = NULL_TREE;
1633 for (binfo = TYPE_BINFO (*typep), i = 0;
1634 BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
1636 tree t = BINFO_TYPE (base_binfo);
1637 if ((field = lookup_field (&t, name)))
1639 if (save_field == field)
1641 if (save_field == NULL_TREE)
1645 tree i1 = DECL_CONTEXT (save_field);
1646 tree i2 = DECL_CONTEXT (field);
1647 error ("reference %qs is ambiguous: appears in interface %qs and interface %qs",
1648 IDENTIFIER_POINTER (name),
1649 IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (i1))),
1650 IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (i2))));
1651 return error_mark_node;
1656 if (save_field != NULL_TREE)
1659 *typep = CLASSTYPE_SUPER (*typep);
1664 /* Look up the field named NAME in object SELF_VALUE,
1665 which has class SELF_CLASS (a non-handle RECORD_TYPE).
1666 SELF_VALUE is NULL_TREE if looking for a static field. */
1669 build_field_ref (tree self_value, tree self_class, tree name)
1671 tree base_class = self_class;
1672 tree field_decl = lookup_field (&base_class, name);
1673 if (field_decl == NULL_TREE)
1675 error ("field %qs not found", IDENTIFIER_POINTER (name));
1676 return error_mark_node;
1678 if (self_value == NULL_TREE)
1680 return build_static_field_ref (field_decl);
1684 tree base_type = promote_type (base_class);
1686 /* CHECK is true if self_value is not the this pointer. */
1687 int check = (! (DECL_P (self_value)
1688 && DECL_NAME (self_value) == this_identifier_node));
1690 /* Determine whether a field offset from NULL will lie within
1691 Page 0: this is necessary on those GNU/Linux/BSD systems that
1692 trap SEGV to generate NullPointerExceptions.
1694 We assume that Page 0 will be mapped with NOPERM, and that
1695 memory may be allocated from any other page, so only field
1696 offsets < pagesize are guaranteed to trap. We also assume
1697 the smallest page size we'll encounter is 4k bytes. */
1698 if (! flag_syntax_only && check && ! flag_check_references
1699 && ! flag_indirect_dispatch)
1701 tree field_offset = byte_position (field_decl);
1703 page_size = size_int (4096);
1704 check = ! INT_CST_LT_UNSIGNED (field_offset, page_size);
1707 if (base_type != TREE_TYPE (self_value))
1708 self_value = fold_build1 (NOP_EXPR, base_type, self_value);
1709 if (! flag_syntax_only && flag_indirect_dispatch)
1712 = build_int_cst (NULL_TREE, get_symbol_table_index
1713 (field_decl, NULL_TREE,
1714 &TYPE_OTABLE_METHODS (output_class)));
1716 = build4 (ARRAY_REF, integer_type_node,
1717 TYPE_OTABLE_DECL (output_class), otable_index,
1718 NULL_TREE, NULL_TREE);
1721 if (DECL_CONTEXT (field_decl) != output_class)
1723 = build3 (COND_EXPR, TREE_TYPE (field_offset),
1724 build2 (EQ_EXPR, boolean_type_node,
1725 field_offset, integer_zero_node),
1726 build3 (CALL_EXPR, void_type_node,
1727 build_address_of (soft_nosuchfield_node),
1728 build_tree_list (NULL_TREE, otable_index),
1732 field_offset = fold (convert (sizetype, field_offset));
1733 self_value = java_check_reference (self_value, check);
1735 = fold_build2 (PLUS_EXPR,
1736 build_pointer_type (TREE_TYPE (field_decl)),
1737 self_value, field_offset);
1738 return fold_build1 (INDIRECT_REF, TREE_TYPE (field_decl), address);
1741 self_value = build_java_indirect_ref (TREE_TYPE (TREE_TYPE (self_value)),
1743 return fold_build3 (COMPONENT_REF, TREE_TYPE (field_decl),
1744 self_value, field_decl, NULL_TREE);
1749 lookup_label (int pc)
1753 if (pc > highest_label_pc_this_method)
1754 highest_label_pc_this_method = pc;
1755 ASM_GENERATE_INTERNAL_LABEL(buf, "LJpc=", start_label_pc_this_method + pc);
1756 name = get_identifier (buf);
1757 if (IDENTIFIER_LOCAL_VALUE (name))
1758 return IDENTIFIER_LOCAL_VALUE (name);
1761 /* The type of the address of a label is return_address_type_node. */
1762 tree decl = create_label_decl (name);
1763 LABEL_PC (decl) = pc;
1764 return pushdecl (decl);
1768 /* Generate a unique name for the purpose of loops and switches
1769 labels, and try-catch-finally blocks label or temporary variables. */
1772 generate_name (void)
1774 static int l_number = 0;
1776 ASM_GENERATE_INTERNAL_LABEL(buff, "LJv", l_number);
1778 return get_identifier (buff);
1782 create_label_decl (tree name)
1785 decl = build_decl (LABEL_DECL, name,
1786 TREE_TYPE (return_address_type_node));
1787 DECL_CONTEXT (decl) = current_function_decl;
1788 DECL_IGNORED_P (decl) = 1;
1792 /* This maps a bytecode offset (PC) to various flags. */
1793 char *instruction_bits;
1796 note_label (int current_pc ATTRIBUTE_UNUSED, int target_pc)
1798 lookup_label (target_pc);
1799 instruction_bits [target_pc] |= BCODE_JUMP_TARGET;
1802 /* Emit code to jump to TARGET_PC if VALUE1 CONDITION VALUE2,
1803 where CONDITION is one of one the compare operators. */
1806 expand_compare (enum tree_code condition, tree value1, tree value2,
1809 tree target = lookup_label (target_pc);
1810 tree cond = fold_build2 (condition, boolean_type_node, value1, value2);
1812 (build3 (COND_EXPR, void_type_node, java_truthvalue_conversion (cond),
1813 build1 (GOTO_EXPR, void_type_node, target),
1814 build_java_empty_stmt ()));
1817 /* Emit code for a TEST-type opcode. */
1820 expand_test (enum tree_code condition, tree type, int target_pc)
1822 tree value1, value2;
1823 flush_quick_stack ();
1824 value1 = pop_value (type);
1825 value2 = (type == ptr_type_node) ? null_pointer_node : integer_zero_node;
1826 expand_compare (condition, value1, value2, target_pc);
1829 /* Emit code for a COND-type opcode. */
1832 expand_cond (enum tree_code condition, tree type, int target_pc)
1834 tree value1, value2;
1835 flush_quick_stack ();
1836 /* note: pop values in opposite order */
1837 value2 = pop_value (type);
1838 value1 = pop_value (type);
1839 /* Maybe should check value1 and value2 for type compatibility ??? */
1840 expand_compare (condition, value1, value2, target_pc);
1844 expand_java_goto (int target_pc)
1846 tree target_label = lookup_label (target_pc);
1847 flush_quick_stack ();
1848 java_add_stmt (build1 (GOTO_EXPR, void_type_node, target_label));
1852 expand_java_switch (tree selector, int default_pc)
1854 tree switch_expr, x;
1856 flush_quick_stack ();
1857 switch_expr = build3 (SWITCH_EXPR, TREE_TYPE (selector), selector,
1858 NULL_TREE, NULL_TREE);
1859 java_add_stmt (switch_expr);
1861 x = build3 (CASE_LABEL_EXPR, void_type_node, NULL_TREE, NULL_TREE,
1862 create_artificial_label ());
1863 append_to_statement_list (x, &SWITCH_BODY (switch_expr));
1865 x = build1 (GOTO_EXPR, void_type_node, lookup_label (default_pc));
1866 append_to_statement_list (x, &SWITCH_BODY (switch_expr));
1872 expand_java_add_case (tree switch_expr, int match, int target_pc)
1876 value = build_int_cst (TREE_TYPE (switch_expr), match);
1878 x = build3 (CASE_LABEL_EXPR, void_type_node, value, NULL_TREE,
1879 create_artificial_label ());
1880 append_to_statement_list (x, &SWITCH_BODY (switch_expr));
1882 x = build1 (GOTO_EXPR, void_type_node, lookup_label (target_pc));
1883 append_to_statement_list (x, &SWITCH_BODY (switch_expr));
1887 pop_arguments (tree arg_types)
1889 if (arg_types == end_params_node)
1891 if (TREE_CODE (arg_types) == TREE_LIST)
1893 tree tail = pop_arguments (TREE_CHAIN (arg_types));
1894 tree type = TREE_VALUE (arg_types);
1895 tree arg = pop_value (type);
1897 /* We simply cast each argument to its proper type. This is
1898 needed since we lose type information coming out of the
1899 verifier. We also have to do this when we pop an integer
1900 type that must be promoted for the function call. */
1901 if (TREE_CODE (type) == POINTER_TYPE)
1902 arg = build1 (NOP_EXPR, type, arg);
1903 else if (targetm.calls.promote_prototypes (type)
1904 && TYPE_PRECISION (type) < TYPE_PRECISION (integer_type_node)
1905 && INTEGRAL_TYPE_P (type))
1906 arg = convert (integer_type_node, arg);
1907 return tree_cons (NULL_TREE, arg, tail);
1912 /* Attach to PTR (a block) the declaration found in ENTRY. */
1915 attach_init_test_initialization_flags (void **entry, void *ptr)
1917 tree block = (tree)ptr;
1918 struct treetreehash_entry *ite = (struct treetreehash_entry *) *entry;
1920 if (block != error_mark_node)
1922 if (TREE_CODE (block) == BIND_EXPR)
1924 tree body = BIND_EXPR_BODY (block);
1925 TREE_CHAIN (ite->value) = BIND_EXPR_VARS (block);
1926 BIND_EXPR_VARS (block) = ite->value;
1927 body = build2 (COMPOUND_EXPR, void_type_node,
1928 build1 (DECL_EXPR, void_type_node, ite->value), body);
1929 BIND_EXPR_BODY (block) = body;
1933 tree body = BLOCK_SUBBLOCKS (block);
1934 TREE_CHAIN (ite->value) = BLOCK_EXPR_DECLS (block);
1935 BLOCK_EXPR_DECLS (block) = ite->value;
1936 body = build2 (COMPOUND_EXPR, void_type_node,
1937 build1 (DECL_EXPR, void_type_node, ite->value), body);
1938 BLOCK_SUBBLOCKS (block) = body;
1945 /* Build an expression to initialize the class CLAS.
1946 if EXPR is non-NULL, returns an expression to first call the initializer
1947 (if it is needed) and then calls EXPR. */
1950 build_class_init (tree clas, tree expr)
1954 /* An optimization: if CLAS is a superclass of the class we're
1955 compiling, we don't need to initialize it. However, if CLAS is
1956 an interface, it won't necessarily be initialized, even if we
1958 if ((! CLASS_INTERFACE (TYPE_NAME (clas))
1959 && inherits_from_p (current_class, clas))
1960 || current_class == clas)
1963 if (always_initialize_class_p)
1965 init = build3 (CALL_EXPR, void_type_node,
1966 build_address_of (soft_initclass_node),
1967 build_tree_list (NULL_TREE, build_class_ref (clas)),
1969 TREE_SIDE_EFFECTS (init) = 1;
1973 tree *init_test_decl;
1975 init_test_decl = java_treetreehash_new
1976 (DECL_FUNCTION_INIT_TEST_TABLE (current_function_decl), clas);
1978 if (*init_test_decl == NULL)
1980 /* Build a declaration and mark it as a flag used to track
1981 static class initializations. */
1982 decl = build_decl (VAR_DECL, NULL_TREE,
1984 MAYBE_CREATE_VAR_LANG_DECL_SPECIFIC (decl);
1985 LOCAL_CLASS_INITIALIZATION_FLAG (decl) = 1;
1986 DECL_CONTEXT (decl) = current_function_decl;
1987 DECL_FUNCTION_INIT_TEST_CLASS (decl) = clas;
1988 /* Tell the check-init code to ignore this decl when not
1989 optimizing class initialization. */
1990 if (!STATIC_CLASS_INIT_OPT_P ())
1991 DECL_BIT_INDEX (decl) = -1;
1992 DECL_INITIAL (decl) = boolean_false_node;
1993 /* Don't emit any symbolic debugging info for this decl. */
1994 DECL_IGNORED_P (decl) = 1;
1995 *init_test_decl = decl;
1998 init = build3 (CALL_EXPR, void_type_node,
1999 build_address_of (soft_initclass_node),
2000 build_tree_list (NULL_TREE, build_class_ref (clas)),
2002 TREE_SIDE_EFFECTS (init) = 1;
2003 init = build3 (COND_EXPR, void_type_node,
2004 build2 (EQ_EXPR, boolean_type_node,
2005 *init_test_decl, boolean_false_node),
2006 init, integer_zero_node);
2007 TREE_SIDE_EFFECTS (init) = 1;
2008 init = build2 (COMPOUND_EXPR, TREE_TYPE (expr), init,
2009 build2 (MODIFY_EXPR, boolean_type_node,
2010 *init_test_decl, boolean_true_node));
2011 TREE_SIDE_EFFECTS (init) = 1;
2014 if (expr != NULL_TREE)
2016 expr = build2 (COMPOUND_EXPR, TREE_TYPE (expr), init, expr);
2017 TREE_SIDE_EFFECTS (expr) = 1;
2025 /* Rewrite expensive calls that require stack unwinding at runtime to
2026 cheaper alternatives. The logic here performs these
2029 java.lang.Class.forName("foo") -> java.lang.Class.forName("foo", class$)
2030 java.lang.Class.getClassLoader() -> java.lang.Class.getClassLoader(class$)
2036 const char *classname;
2038 const char *signature;
2039 const char *new_signature;
2041 tree (*rewrite_arglist) (tree arglist);
2044 /* Add this.class to the end of an arglist. */
2047 rewrite_arglist_getclass (tree arglist)
2049 return chainon (arglist,
2050 tree_cons (NULL_TREE, build_class_ref (output_class), NULL_TREE));
2053 static rewrite_rule rules[] =
2054 {{"java.lang.Class", "getClassLoader", "()Ljava/lang/ClassLoader;",
2055 "(Ljava/lang/Class;)Ljava/lang/ClassLoader;",
2056 ACC_FINAL|ACC_PRIVATE, rewrite_arglist_getclass},
2057 {"java.lang.Class", "forName", "(Ljava/lang/String;)Ljava/lang/Class;",
2058 "(Ljava/lang/String;Ljava/lang/Class;)Ljava/lang/Class;",
2059 ACC_FINAL|ACC_PRIVATE|ACC_STATIC, rewrite_arglist_getclass},
2060 {NULL, NULL, NULL, NULL, 0, NULL}};
2062 /* Scan the rules list for replacements for *METHOD_P and replace the
2063 args accordingly. If the rewrite results in an access to a private
2064 method, update SPECIAL.*/
2067 maybe_rewrite_invocation (tree *method_p, tree *arg_list_p,
2068 tree *method_signature_p, tree *special)
2070 tree context = DECL_NAME (TYPE_NAME (DECL_CONTEXT (*method_p)));
2072 *special = NULL_TREE;
2074 for (p = rules; p->classname; p++)
2076 if (get_identifier (p->classname) == context)
2078 tree method = DECL_NAME (*method_p);
2079 if (get_identifier (p->method) == method
2080 && get_identifier (p->signature) == *method_signature_p)
2083 = lookup_java_method (DECL_CONTEXT (*method_p),
2085 get_identifier (p->new_signature));
2086 if (! maybe_method && ! flag_verify_invocations)
2089 = add_method (DECL_CONTEXT (*method_p), p->flags,
2090 method, get_identifier (p->new_signature));
2091 DECL_EXTERNAL (maybe_method) = 1;
2093 *method_p = maybe_method;
2094 gcc_assert (*method_p);
2095 *arg_list_p = p->rewrite_arglist (*arg_list_p);
2096 *method_signature_p = get_identifier (p->new_signature);
2097 *special = integer_one_node;
2108 build_known_method_ref (tree method, tree method_type ATTRIBUTE_UNUSED,
2109 tree self_type, tree method_signature ATTRIBUTE_UNUSED,
2110 tree arg_list ATTRIBUTE_UNUSED, tree special)
2113 if (is_compiled_class (self_type))
2115 /* With indirect dispatch we have to use indirect calls for all
2116 publicly visible methods or gcc will use PLT indirections
2117 to reach them. We also have to use indirect dispatch for all
2118 external methods. */
2119 if (! flag_indirect_dispatch
2120 || (! DECL_EXTERNAL (method) && ! TREE_PUBLIC (method)))
2122 func = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (method)),
2128 = build_int_cst (NULL_TREE,
2129 (get_symbol_table_index
2131 &TYPE_ATABLE_METHODS (output_class))));
2133 = build4 (ARRAY_REF,
2134 TREE_TYPE (TREE_TYPE (TYPE_ATABLE_DECL (output_class))),
2135 TYPE_ATABLE_DECL (output_class), table_index,
2136 NULL_TREE, NULL_TREE);
2138 func = convert (method_ptr_type_node, func);
2142 /* We don't know whether the method has been (statically) compiled.
2143 Compile this code to get a reference to the method's code:
2145 SELF_TYPE->methods[METHOD_INDEX].ncode
2149 int method_index = 0;
2152 /* The method might actually be declared in some superclass, so
2153 we have to use its class context, not the caller's notion of
2154 where the method is. */
2155 self_type = DECL_CONTEXT (method);
2156 ref = build_class_ref (self_type);
2157 ref = build1 (INDIRECT_REF, class_type_node, ref);
2158 if (ncode_ident == NULL_TREE)
2159 ncode_ident = get_identifier ("ncode");
2160 if (methods_ident == NULL_TREE)
2161 methods_ident = get_identifier ("methods");
2162 ref = build3 (COMPONENT_REF, method_ptr_type_node, ref,
2163 lookup_field (&class_type_node, methods_ident),
2165 for (meth = TYPE_METHODS (self_type);
2166 ; meth = TREE_CHAIN (meth))
2170 if (meth == NULL_TREE)
2171 fatal_error ("method '%s' not found in class",
2172 IDENTIFIER_POINTER (DECL_NAME (method)));
2175 method_index *= int_size_in_bytes (method_type_node);
2176 ref = fold_build2 (PLUS_EXPR, method_ptr_type_node,
2177 ref, build_int_cst (NULL_TREE, method_index));
2178 ref = build1 (INDIRECT_REF, method_type_node, ref);
2179 func = build3 (COMPONENT_REF, nativecode_ptr_type_node,
2180 ref, lookup_field (&method_type_node, ncode_ident),
2187 invoke_build_dtable (int is_invoke_interface, tree arg_list)
2189 tree dtable, objectref;
2191 TREE_VALUE (arg_list) = save_expr (TREE_VALUE (arg_list));
2193 /* If we're dealing with interfaces and if the objectref
2194 argument is an array then get the dispatch table of the class
2195 Object rather than the one from the objectref. */
2196 objectref = (is_invoke_interface
2197 && is_array_type_p (TREE_TYPE (TREE_VALUE (arg_list)))
2198 ? build_class_ref (object_type_node) : TREE_VALUE (arg_list));
2200 if (dtable_ident == NULL_TREE)
2201 dtable_ident = get_identifier ("vtable");
2202 dtable = build_java_indirect_ref (object_type_node, objectref,
2203 flag_check_references);
2204 dtable = build3 (COMPONENT_REF, dtable_ptr_type, dtable,
2205 lookup_field (&object_type_node, dtable_ident), NULL_TREE);
2210 /* Determine the index in SYMBOL_TABLE for a reference to the decl
2211 T. If this decl has not been seen before, it will be added to the
2212 [oa]table_methods. If it has, the existing table slot will be
2216 get_symbol_table_index (tree t, tree special, tree *symbol_table)
2221 if (*symbol_table == NULL_TREE)
2223 *symbol_table = build_tree_list (special, t);
2227 method_list = *symbol_table;
2231 tree value = TREE_VALUE (method_list);
2232 tree purpose = TREE_PURPOSE (method_list);
2233 if (value == t && purpose == special)
2236 if (TREE_CHAIN (method_list) == NULL_TREE)
2239 method_list = TREE_CHAIN (method_list);
2242 TREE_CHAIN (method_list) = build_tree_list (special, t);
2247 build_invokevirtual (tree dtable, tree method, tree special)
2250 tree nativecode_ptr_ptr_type_node
2251 = build_pointer_type (nativecode_ptr_type_node);
2255 if (flag_indirect_dispatch)
2257 gcc_assert (! CLASS_INTERFACE (TYPE_NAME (DECL_CONTEXT (method))));
2260 = build_int_cst (NULL_TREE, get_symbol_table_index
2262 &TYPE_OTABLE_METHODS (output_class)));
2263 method_index = build4 (ARRAY_REF, integer_type_node,
2264 TYPE_OTABLE_DECL (output_class),
2265 otable_index, NULL_TREE, NULL_TREE);
2269 /* We fetch the DECL_VINDEX field directly here, rather than
2270 using get_method_index(). DECL_VINDEX is the true offset
2271 from the vtable base to a method, regrdless of any extra
2272 words inserted at the start of the vtable. */
2273 method_index = DECL_VINDEX (method);
2274 method_index = size_binop (MULT_EXPR, method_index,
2275 TYPE_SIZE_UNIT (nativecode_ptr_ptr_type_node));
2276 if (TARGET_VTABLE_USES_DESCRIPTORS)
2277 method_index = size_binop (MULT_EXPR, method_index,
2278 size_int (TARGET_VTABLE_USES_DESCRIPTORS));
2281 func = fold_build2 (PLUS_EXPR, nativecode_ptr_ptr_type_node, dtable,
2282 convert (nativecode_ptr_ptr_type_node, method_index));
2284 if (TARGET_VTABLE_USES_DESCRIPTORS)
2285 func = build1 (NOP_EXPR, nativecode_ptr_type_node, func);
2287 func = build1 (INDIRECT_REF, nativecode_ptr_type_node, func);
2292 static GTY(()) tree class_ident;
2294 build_invokeinterface (tree dtable, tree method)
2300 /* We expand invokeinterface here. */
2302 if (class_ident == NULL_TREE)
2303 class_ident = get_identifier ("class");
2305 dtable = build_java_indirect_ref (dtable_type, dtable,
2306 flag_check_references);
2307 dtable = build3 (COMPONENT_REF, class_ptr_type, dtable,
2308 lookup_field (&dtable_type, class_ident), NULL_TREE);
2310 interface = DECL_CONTEXT (method);
2311 gcc_assert (CLASS_INTERFACE (TYPE_NAME (interface)));
2312 layout_class_methods (interface);
2314 if (flag_indirect_dispatch)
2317 = 2 * (get_symbol_table_index
2318 (method, NULL_TREE, &TYPE_ITABLE_METHODS (output_class)));
2320 = build4 (ARRAY_REF,
2321 TREE_TYPE (TREE_TYPE (TYPE_ITABLE_DECL (output_class))),
2322 TYPE_ITABLE_DECL (output_class),
2323 build_int_cst (NULL_TREE, itable_index-1),
2324 NULL_TREE, NULL_TREE);
2326 = build4 (ARRAY_REF,
2327 TREE_TYPE (TREE_TYPE (TYPE_ITABLE_DECL (output_class))),
2328 TYPE_ITABLE_DECL (output_class),
2329 build_int_cst (NULL_TREE, itable_index),
2330 NULL_TREE, NULL_TREE);
2331 interface = convert (class_ptr_type, interface);
2332 idx = convert (integer_type_node, idx);
2336 idx = build_int_cst (NULL_TREE,
2337 get_interface_method_index (method, interface));
2338 interface = build_class_ref (interface);
2341 lookup_arg = tree_cons (NULL_TREE, dtable,
2342 tree_cons (NULL_TREE, interface,
2343 build_tree_list (NULL_TREE, idx)));
2345 return build3 (CALL_EXPR, ptr_type_node,
2346 build_address_of (soft_lookupinterfacemethod_node),
2347 lookup_arg, NULL_TREE);
2350 /* Expand one of the invoke_* opcodes.
2351 OPCODE is the specific opcode.
2352 METHOD_REF_INDEX is an index into the constant pool.
2353 NARGS is the number of arguments, or -1 if not specified. */
2356 expand_invoke (int opcode, int method_ref_index, int nargs ATTRIBUTE_UNUSED)
2358 tree method_signature
2359 = COMPONENT_REF_SIGNATURE(¤t_jcf->cpool, method_ref_index);
2360 tree method_name = COMPONENT_REF_NAME (¤t_jcf->cpool,
2363 = get_class_constant (current_jcf,
2364 COMPONENT_REF_CLASS_INDEX(¤t_jcf->cpool,
2366 const char *const self_name
2367 = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (self_type)));
2368 tree call, func, method, arg_list, method_type;
2369 tree check = NULL_TREE;
2371 tree special = NULL_TREE;
2373 if (! CLASS_LOADED_P (self_type))
2375 load_class (self_type, 1);
2376 safe_layout_class (self_type);
2377 if (TREE_CODE (TYPE_SIZE (self_type)) == ERROR_MARK)
2378 fatal_error ("failed to find class '%s'", self_name);
2380 layout_class_methods (self_type);
2382 if (ID_INIT_P (method_name))
2383 method = lookup_java_constructor (self_type, method_signature);
2385 method = lookup_java_method (self_type, method_name, method_signature);
2387 /* We've found a method in a class other than the one in which it
2388 was wanted. This can happen if, for instance, we're trying to
2389 compile invokespecial super.equals().
2390 FIXME: This is a kludge. Rather than nullifying the result, we
2391 should change lookup_java_method() so that it doesn't search the
2392 superclass chain when we're BC-compiling. */
2393 if (! flag_verify_invocations
2395 && ! TYPE_ARRAY_P (self_type)
2396 && self_type != DECL_CONTEXT (method))
2399 /* We've found a method in an interface, but this isn't an interface
2401 if (opcode != OPCODE_invokeinterface
2403 && (CLASS_INTERFACE (TYPE_NAME (DECL_CONTEXT (method)))))
2406 /* We've found a non-interface method but we are making an
2407 interface call. This can happen if the interface overrides a
2408 method in Object. */
2409 if (! flag_verify_invocations
2410 && opcode == OPCODE_invokeinterface
2412 && ! CLASS_INTERFACE (TYPE_NAME (DECL_CONTEXT (method))))
2415 if (method == NULL_TREE)
2417 if (flag_verify_invocations || ! flag_indirect_dispatch)
2419 error ("class '%s' has no method named '%s' matching signature '%s'",
2421 IDENTIFIER_POINTER (method_name),
2422 IDENTIFIER_POINTER (method_signature));
2426 int flags = ACC_PUBLIC;
2427 if (opcode == OPCODE_invokestatic)
2428 flags |= ACC_STATIC;
2429 if (opcode == OPCODE_invokeinterface)
2431 flags |= ACC_INTERFACE | ACC_ABSTRACT;
2432 CLASS_INTERFACE (TYPE_NAME (self_type)) = 1;
2434 method = add_method (self_type, flags, method_name,
2436 DECL_ARTIFICIAL (method) = 1;
2437 METHOD_DUMMY (method) = 1;
2438 layout_class_method (self_type, NULL,
2443 /* Invoke static can't invoke static/abstract method */
2444 if (method != NULL_TREE)
2446 if (opcode == OPCODE_invokestatic)
2448 if (!METHOD_STATIC (method))
2450 error ("invokestatic on non static method");
2453 else if (METHOD_ABSTRACT (method))
2455 error ("invokestatic on abstract method");
2461 if (METHOD_STATIC (method))
2463 error ("invoke[non-static] on static method");
2469 if (method == NULL_TREE)
2471 /* If we got here, we emitted an error message above. So we
2472 just pop the arguments, push a properly-typed zero, and
2474 method_type = get_type_from_signature (method_signature);
2475 pop_arguments (TYPE_ARG_TYPES (method_type));
2476 if (opcode != OPCODE_invokestatic)
2477 pop_type (self_type);
2478 method_type = promote_type (TREE_TYPE (method_type));
2479 push_value (convert (method_type, integer_zero_node));
2483 method_type = TREE_TYPE (method);
2484 arg_list = pop_arguments (TYPE_ARG_TYPES (method_type));
2485 flush_quick_stack ();
2487 maybe_rewrite_invocation (&method, &arg_list, &method_signature,
2491 if (opcode == OPCODE_invokestatic)
2492 func = build_known_method_ref (method, method_type, self_type,
2493 method_signature, arg_list, special);
2494 else if (opcode == OPCODE_invokespecial
2495 || (opcode == OPCODE_invokevirtual
2496 && (METHOD_PRIVATE (method)
2497 || METHOD_FINAL (method)
2498 || CLASS_FINAL (TYPE_NAME (self_type)))))
2500 /* If the object for the method call is null, we throw an
2501 exception. We don't do this if the object is the current
2502 method's `this'. In other cases we just rely on an
2503 optimization pass to eliminate redundant checks. FIXME:
2504 Unfortunately there doesn't seem to be a way to determine
2505 what the current method is right now.
2506 We do omit the check if we're calling <init>. */
2507 /* We use a SAVE_EXPR here to make sure we only evaluate
2508 the new `self' expression once. */
2509 tree save_arg = save_expr (TREE_VALUE (arg_list));
2510 TREE_VALUE (arg_list) = save_arg;
2511 check = java_check_reference (save_arg, ! DECL_INIT_P (method));
2512 func = build_known_method_ref (method, method_type, self_type,
2513 method_signature, arg_list, special);
2517 tree dtable = invoke_build_dtable (opcode == OPCODE_invokeinterface,
2519 if (opcode == OPCODE_invokevirtual)
2520 func = build_invokevirtual (dtable, method, special);
2522 func = build_invokeinterface (dtable, method);
2525 if (TREE_CODE (func) == ADDR_EXPR)
2526 TREE_TYPE (func) = build_pointer_type (method_type);
2528 func = build1 (NOP_EXPR, build_pointer_type (method_type), func);
2530 call = build3 (CALL_EXPR, TREE_TYPE (method_type),
2531 func, arg_list, NULL_TREE);
2532 TREE_SIDE_EFFECTS (call) = 1;
2533 call = check_for_builtin (method, call);
2535 if (check != NULL_TREE)
2537 call = build2 (COMPOUND_EXPR, TREE_TYPE (call), check, call);
2538 TREE_SIDE_EFFECTS (call) = 1;
2541 if (TREE_CODE (TREE_TYPE (method_type)) == VOID_TYPE)
2542 java_add_stmt (call);
2546 flush_quick_stack ();
2550 /* Create a stub which will be put into the vtable but which will call
2554 build_jni_stub (tree method)
2556 tree jnifunc, call, args, body, lookup_arg, method_sig, arg_types;
2557 tree jni_func_type, tem;
2558 tree env_var, res_var = NULL_TREE, block;
2559 tree method_args, res_type;
2565 tree klass = DECL_CONTEXT (method);
2566 int from_class = ! CLASS_FROM_SOURCE_P (klass);
2567 klass = build_class_ref (klass);
2569 gcc_assert (METHOD_NATIVE (method) && flag_jni);
2571 DECL_ARTIFICIAL (method) = 1;
2572 DECL_EXTERNAL (method) = 0;
2574 env_var = build_decl (VAR_DECL, get_identifier ("env"), ptr_type_node);
2575 DECL_CONTEXT (env_var) = method;
2577 if (TREE_TYPE (TREE_TYPE (method)) != void_type_node)
2579 res_var = build_decl (VAR_DECL, get_identifier ("res"),
2580 TREE_TYPE (TREE_TYPE (method)));
2581 DECL_CONTEXT (res_var) = method;
2582 TREE_CHAIN (env_var) = res_var;
2585 meth_var = build_decl (VAR_DECL, get_identifier ("meth"), ptr_type_node);
2586 TREE_STATIC (meth_var) = 1;
2587 TREE_PUBLIC (meth_var) = 0;
2588 DECL_EXTERNAL (meth_var) = 0;
2589 DECL_CONTEXT (meth_var) = method;
2590 DECL_ARTIFICIAL (meth_var) = 1;
2591 DECL_INITIAL (meth_var) = null_pointer_node;
2592 TREE_USED (meth_var) = 1;
2593 chainon (env_var, meth_var);
2594 build_result_decl (method);
2596 /* One strange way that the front ends are different is that they
2597 store arguments differently. */
2599 method_args = DECL_ARGUMENTS (method);
2601 method_args = BLOCK_EXPR_DECLS (DECL_FUNCTION_BODY (method));
2602 block = build_block (env_var, NULL_TREE, method_args, NULL_TREE);
2603 TREE_SIDE_EFFECTS (block) = 1;
2604 /* When compiling from source we don't set the type of the block,
2605 because that will prevent patch_return from ever being run. */
2607 TREE_TYPE (block) = TREE_TYPE (TREE_TYPE (method));
2609 /* Compute the local `env' by calling _Jv_GetJNIEnvNewFrame. */
2610 body = build2 (MODIFY_EXPR, ptr_type_node, env_var,
2611 build3 (CALL_EXPR, ptr_type_node,
2612 build_address_of (soft_getjnienvnewframe_node),
2613 build_tree_list (NULL_TREE, klass),
2615 CAN_COMPLETE_NORMALLY (body) = 1;
2617 /* All the arguments to this method become arguments to the
2618 underlying JNI function. If we had to wrap object arguments in a
2619 special way, we would do that here. */
2621 for (tem = method_args; tem != NULL_TREE; tem = TREE_CHAIN (tem))
2623 int arg_bits = TREE_INT_CST_LOW (TYPE_SIZE (TREE_TYPE (tem)));
2624 #ifdef PARM_BOUNDARY
2625 arg_bits = (((arg_bits + PARM_BOUNDARY - 1) / PARM_BOUNDARY)
2628 args_size += (arg_bits / BITS_PER_UNIT);
2630 args = tree_cons (NULL_TREE, tem, args);
2632 args = nreverse (args);
2633 arg_types = TYPE_ARG_TYPES (TREE_TYPE (method));
2635 /* For a static method the second argument is the class. For a
2636 non-static method the second argument is `this'; that is already
2637 available in the argument list. */
2638 if (METHOD_STATIC (method))
2640 args_size += int_size_in_bytes (TREE_TYPE (klass));
2641 args = tree_cons (NULL_TREE, klass, args);
2642 arg_types = tree_cons (NULL_TREE, object_ptr_type_node, arg_types);
2645 /* The JNIEnv structure is the first argument to the JNI function. */
2646 args_size += int_size_in_bytes (TREE_TYPE (env_var));
2647 args = tree_cons (NULL_TREE, env_var, args);
2648 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
2650 /* We call _Jv_LookupJNIMethod to find the actual underlying
2651 function pointer. _Jv_LookupJNIMethod will throw the appropriate
2652 exception if this function is not found at runtime. */
2653 tem = build_tree_list (NULL_TREE, build_int_cst (NULL_TREE, args_size));
2654 method_sig = build_java_signature (TREE_TYPE (method));
2655 lookup_arg = tree_cons (NULL_TREE,
2656 build_utf8_ref (unmangle_classname
2657 (IDENTIFIER_POINTER (method_sig),
2658 IDENTIFIER_LENGTH (method_sig))),
2660 tem = DECL_NAME (method);
2662 = tree_cons (NULL_TREE, klass,
2663 tree_cons (NULL_TREE, build_utf8_ref (tem), lookup_arg));
2665 tem = build_function_type (TREE_TYPE (TREE_TYPE (method)), arg_types);
2667 #ifdef MODIFY_JNI_METHOD_CALL
2668 tem = MODIFY_JNI_METHOD_CALL (tem);
2671 jni_func_type = build_pointer_type (tem);
2673 jnifunc = build3 (COND_EXPR, ptr_type_node,
2675 build2 (MODIFY_EXPR, ptr_type_node, meth_var,
2676 build3 (CALL_EXPR, ptr_type_node,
2678 (soft_lookupjnimethod_node),
2679 lookup_arg, NULL_TREE)));
2681 /* Now we make the actual JNI call via the resulting function
2683 call = build3 (CALL_EXPR, TREE_TYPE (TREE_TYPE (method)),
2684 build1 (NOP_EXPR, jni_func_type, jnifunc),
2687 /* If the JNI call returned a result, capture it here. If we had to
2688 unwrap JNI object results, we would do that here. */
2689 if (res_var != NULL_TREE)
2691 /* If the call returns an object, it may return a JNI weak
2692 reference, in which case we must unwrap it. */
2693 if (! JPRIMITIVE_TYPE_P (TREE_TYPE (TREE_TYPE (method))))
2694 call = build3 (CALL_EXPR, TREE_TYPE (TREE_TYPE (method)),
2695 build_address_of (soft_unwrapjni_node),
2696 build_tree_list (NULL_TREE, call),
2698 call = build2 (MODIFY_EXPR, TREE_TYPE (TREE_TYPE (method)),
2702 TREE_SIDE_EFFECTS (call) = 1;
2703 CAN_COMPLETE_NORMALLY (call) = 1;
2705 body = build2 (COMPOUND_EXPR, void_type_node, body, call);
2706 TREE_SIDE_EFFECTS (body) = 1;
2708 /* Now free the environment we allocated. */
2709 call = build3 (CALL_EXPR, ptr_type_node,
2710 build_address_of (soft_jnipopsystemframe_node),
2711 build_tree_list (NULL_TREE, env_var),
2713 TREE_SIDE_EFFECTS (call) = 1;
2714 CAN_COMPLETE_NORMALLY (call) = 1;
2715 body = build2 (COMPOUND_EXPR, void_type_node, body, call);
2716 TREE_SIDE_EFFECTS (body) = 1;
2718 /* Finally, do the return. */
2719 res_type = void_type_node;
2720 if (res_var != NULL_TREE)
2723 gcc_assert (DECL_RESULT (method));
2724 /* Make sure we copy the result variable to the actual
2725 result. We use the type of the DECL_RESULT because it
2726 might be different from the return type of the function:
2727 it might be promoted. */
2728 drt = TREE_TYPE (DECL_RESULT (method));
2729 if (drt != TREE_TYPE (res_var))
2730 res_var = build1 (CONVERT_EXPR, drt, res_var);
2731 res_var = build2 (MODIFY_EXPR, drt, DECL_RESULT (method), res_var);
2732 TREE_SIDE_EFFECTS (res_var) = 1;
2735 body = build2 (COMPOUND_EXPR, void_type_node, body,
2736 build1 (RETURN_EXPR, res_type, res_var));
2737 TREE_SIDE_EFFECTS (body) = 1;
2739 bind = build3 (BIND_EXPR, void_type_node, BLOCK_VARS (block),
2745 /* Given lvalue EXP, return a volatile expression that references the
2749 java_modify_addr_for_volatile (tree exp)
2751 tree exp_type = TREE_TYPE (exp);
2753 = build_qualified_type (exp_type,
2754 TYPE_QUALS (exp_type) | TYPE_QUAL_VOLATILE);
2755 tree addr = build_fold_addr_expr (exp);
2756 v_type = build_pointer_type (v_type);
2757 addr = fold_convert (v_type, addr);
2758 exp = build_fold_indirect_ref (addr);
2763 /* Expand an operation to extract from or store into a field.
2764 IS_STATIC is 1 iff the field is static.
2765 IS_PUTTING is 1 for putting into a field; 0 for getting from the field.
2766 FIELD_REF_INDEX is an index into the constant pool. */
2769 expand_java_field_op (int is_static, int is_putting, int field_ref_index)
2772 = get_class_constant (current_jcf,
2773 COMPONENT_REF_CLASS_INDEX (¤t_jcf->cpool,
2775 const char *self_name
2776 = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (self_type)));
2777 tree field_name = COMPONENT_REF_NAME (¤t_jcf->cpool, field_ref_index);
2778 tree field_signature = COMPONENT_REF_SIGNATURE (¤t_jcf->cpool,
2780 tree field_type = get_type_from_signature (field_signature);
2781 tree new_value = is_putting ? pop_value (field_type) : NULL_TREE;
2784 tree original_self_type = self_type;
2788 if (! CLASS_LOADED_P (self_type))
2789 load_class (self_type, 1);
2790 field_decl = lookup_field (&self_type, field_name);
2791 if (field_decl == error_mark_node)
2795 else if (field_decl == NULL_TREE)
2797 if (! flag_verify_invocations)
2799 int flags = ACC_PUBLIC;
2801 flags |= ACC_STATIC;
2802 self_type = original_self_type;
2803 field_decl = add_field (original_self_type, field_name,
2805 DECL_ARTIFICIAL (field_decl) = 1;
2806 DECL_IGNORED_P (field_decl) = 1;
2808 /* FIXME: We should be pessimistic about volatility. We
2809 don't know one way or another, but this is safe.
2810 However, doing this has bad effects on code quality. We
2811 need to look at better ways to do this. */
2812 TREE_THIS_VOLATILE (field_decl) = 1;
2817 error ("missing field '%s' in '%s'",
2818 IDENTIFIER_POINTER (field_name), self_name);
2822 else if (build_java_signature (TREE_TYPE (field_decl)) != field_signature)
2824 error ("mismatching signature for field '%s' in '%s'",
2825 IDENTIFIER_POINTER (field_name), self_name);
2828 field_ref = is_static ? NULL_TREE : pop_value (self_type);
2832 push_value (convert (field_type, integer_zero_node));
2833 flush_quick_stack ();
2837 field_ref = build_field_ref (field_ref, self_type, field_name);
2839 && ! flag_indirect_dispatch)
2841 tree context = DECL_CONTEXT (field_ref);
2842 if (context != self_type && CLASS_INTERFACE (TYPE_NAME (context)))
2843 field_ref = build_class_init (context, field_ref);
2844 field_ref = build_class_init (self_type, field_ref);
2848 flush_quick_stack ();
2849 if (FIELD_FINAL (field_decl))
2851 if (DECL_CONTEXT (field_decl) != current_class)
2852 error ("assignment to final field %q+D not in field's class",
2854 /* We used to check for assignments to final fields not
2855 occurring in the class initializer or in a constructor
2856 here. However, this constraint doesn't seem to be
2857 enforced by the JVM. */
2860 if (TREE_THIS_VOLATILE (field_decl))
2861 field_ref = java_modify_addr_for_volatile (field_ref);
2863 modify_expr = build2 (MODIFY_EXPR, TREE_TYPE (field_ref),
2864 field_ref, new_value);
2866 if (TREE_THIS_VOLATILE (field_decl))
2869 (CALL_EXPR, void_type_node,
2870 build_address_of (built_in_decls[BUILT_IN_SYNCHRONIZE]),
2871 NULL_TREE, NULL_TREE));
2873 java_add_stmt (modify_expr);
2877 tree temp = build_decl (VAR_DECL, NULL_TREE, TREE_TYPE (field_ref));
2878 java_add_local_var (temp);
2880 if (TREE_THIS_VOLATILE (field_decl))
2881 field_ref = java_modify_addr_for_volatile (field_ref);
2884 = build2 (MODIFY_EXPR, TREE_TYPE (field_ref), temp, field_ref);
2885 java_add_stmt (modify_expr);
2887 if (TREE_THIS_VOLATILE (field_decl))
2890 (CALL_EXPR, void_type_node,
2891 build_address_of (built_in_decls[BUILT_IN_SYNCHRONIZE]),
2892 NULL_TREE, NULL_TREE));
2896 TREE_THIS_VOLATILE (field_ref) = TREE_THIS_VOLATILE (field_decl);
2900 load_type_state (tree label)
2903 tree vec = LABEL_TYPE_STATE (label);
2904 int cur_length = TREE_VEC_LENGTH (vec);
2905 stack_pointer = cur_length - DECL_MAX_LOCALS(current_function_decl);
2906 for (i = 0; i < cur_length; i++)
2907 type_map [i] = TREE_VEC_ELT (vec, i);
2910 /* Go over METHOD's bytecode and note instruction starts in
2911 instruction_bits[]. */
2914 note_instructions (JCF *jcf, tree method)
2917 unsigned char* byte_ops;
2918 long length = DECL_CODE_LENGTH (method);
2923 #undef RET /* Defined by config/i386/i386.h */
2925 #define BCODE byte_ops
2926 #define BYTE_type_node byte_type_node
2927 #define SHORT_type_node short_type_node
2928 #define INT_type_node int_type_node
2929 #define LONG_type_node long_type_node
2930 #define CHAR_type_node char_type_node
2931 #define PTR_type_node ptr_type_node
2932 #define FLOAT_type_node float_type_node
2933 #define DOUBLE_type_node double_type_node
2934 #define VOID_type_node void_type_node
2935 #define CONST_INDEX_1 (saw_index = 1, IMMEDIATE_u1)
2936 #define CONST_INDEX_2 (saw_index = 1, IMMEDIATE_u2)
2937 #define VAR_INDEX_1 (saw_index = 1, IMMEDIATE_u1)
2938 #define VAR_INDEX_2 (saw_index = 1, IMMEDIATE_u2)
2940 #define CHECK_PC_IN_RANGE(PC) ((void)1) /* Already handled by verifier. */
2942 JCF_SEEK (jcf, DECL_CODE_OFFSET (method));
2943 byte_ops = jcf->read_ptr;
2944 instruction_bits = xrealloc (instruction_bits, length + 1);
2945 memset (instruction_bits, 0, length + 1);
2947 /* This pass figures out which PC can be the targets of jumps. */
2948 for (PC = 0; PC < length;)
2950 int oldpc = PC; /* PC at instruction start. */
2951 instruction_bits [PC] |= BCODE_INSTRUCTION_START;
2952 switch (byte_ops[PC++])
2954 #define JAVAOP(OPNAME, OPCODE, OPKIND, OPERAND_TYPE, OPERAND_VALUE) \
2956 PRE_##OPKIND(OPERAND_TYPE, OPERAND_VALUE); \
2959 #define NOTE_LABEL(PC) note_label(oldpc, PC)
2961 #define PRE_PUSHC(OPERAND_TYPE, OPERAND_VALUE) (void)(OPERAND_VALUE);
2962 #define PRE_LOAD(OPERAND_TYPE, OPERAND_VALUE) (void)(OPERAND_VALUE);
2963 #define PRE_STORE(OPERAND_TYPE, OPERAND_VALUE) (void)(OPERAND_VALUE);
2964 #define PRE_STACK(OPERAND_TYPE, OPERAND_VALUE) /* nothing */
2965 #define PRE_UNOP(OPERAND_TYPE, OPERAND_VALUE) /* nothing */
2966 #define PRE_BINOP(OPERAND_TYPE, OPERAND_VALUE) /* nothing */
2967 #define PRE_CONVERT(OPERAND_TYPE, OPERAND_VALUE) /* nothing */
2968 #define PRE_CONVERT2(OPERAND_TYPE, OPERAND_VALUE) /* nothing */
2970 #define PRE_SPECIAL(OPERAND_TYPE, INSTRUCTION) \
2971 PRE_SPECIAL_##INSTRUCTION(OPERAND_TYPE)
2972 #define PRE_SPECIAL_IINC(OPERAND_TYPE) \
2973 ((void) IMMEDIATE_u1, (void) IMMEDIATE_s1)
2974 #define PRE_SPECIAL_ENTER(IGNORE) /* nothing */
2975 #define PRE_SPECIAL_EXIT(IGNORE) /* nothing */
2976 #define PRE_SPECIAL_THROW(IGNORE) /* nothing */
2977 #define PRE_SPECIAL_BREAK(IGNORE) /* nothing */
2979 /* two forms of wide instructions */
2980 #define PRE_SPECIAL_WIDE(IGNORE) \
2982 int modified_opcode = IMMEDIATE_u1; \
2983 if (modified_opcode == OPCODE_iinc) \
2985 (void) IMMEDIATE_u2; /* indexbyte1 and indexbyte2 */ \
2986 (void) IMMEDIATE_s2; /* constbyte1 and constbyte2 */ \
2990 (void) IMMEDIATE_u2; /* indexbyte1 and indexbyte2 */ \
2994 #define PRE_IMPL(IGNORE1, IGNORE2) /* nothing */
2996 #define PRE_MONITOR(OPERAND_TYPE, OPERAND_VALUE) /* nothing */
2998 #define PRE_RETURN(OPERAND_TYPE, OPERAND_VALUE) /* nothing */
2999 #define PRE_ARRAY(OPERAND_TYPE, SUBOP) \
3000 PRE_ARRAY_##SUBOP(OPERAND_TYPE)
3001 #define PRE_ARRAY_LOAD(TYPE) /* nothing */
3002 #define PRE_ARRAY_STORE(TYPE) /* nothing */
3003 #define PRE_ARRAY_LENGTH(TYPE) /* nothing */
3004 #define PRE_ARRAY_NEW(TYPE) PRE_ARRAY_NEW_##TYPE
3005 #define PRE_ARRAY_NEW_NUM ((void) IMMEDIATE_u1)
3006 #define PRE_ARRAY_NEW_PTR ((void) IMMEDIATE_u2)
3007 #define PRE_ARRAY_NEW_MULTI ((void) IMMEDIATE_u2, (void) IMMEDIATE_u1)
3009 #define PRE_TEST(OPERAND_TYPE, OPERAND_VALUE) NOTE_LABEL (oldpc+IMMEDIATE_s2)
3010 #define PRE_COND(OPERAND_TYPE, OPERAND_VALUE) NOTE_LABEL (oldpc+IMMEDIATE_s2)
3011 #define PRE_BRANCH(OPERAND_TYPE, OPERAND_VALUE) \
3012 saw_index = 0; INT_temp = (OPERAND_VALUE); \
3013 if (!saw_index) NOTE_LABEL(oldpc + INT_temp);
3014 #define PRE_JSR(OPERAND_TYPE, OPERAND_VALUE) \
3015 saw_index = 0; INT_temp = (OPERAND_VALUE); \
3017 if (!saw_index) NOTE_LABEL(oldpc + INT_temp);
3019 #define PRE_RET(OPERAND_TYPE, OPERAND_VALUE) (void)(OPERAND_VALUE)
3021 #define PRE_SWITCH(OPERAND_TYPE, TABLE_OR_LOOKUP) \
3022 PC = (PC + 3) / 4 * 4; PRE_##TABLE_OR_LOOKUP##_SWITCH
3024 #define PRE_LOOKUP_SWITCH \
3025 { jint default_offset = IMMEDIATE_s4; jint npairs = IMMEDIATE_s4; \
3026 NOTE_LABEL (default_offset+oldpc); \
3028 while (--npairs >= 0) { \
3029 jint match ATTRIBUTE_UNUSED = IMMEDIATE_s4; \
3030 jint offset = IMMEDIATE_s4; \
3031 NOTE_LABEL (offset+oldpc); } \
3034 #define PRE_TABLE_SWITCH \
3035 { jint default_offset = IMMEDIATE_s4; \
3036 jint low = IMMEDIATE_s4; jint high = IMMEDIATE_s4; \
3037 NOTE_LABEL (default_offset+oldpc); \
3039 while (low++ <= high) { \
3040 jint offset = IMMEDIATE_s4; \
3041 NOTE_LABEL (offset+oldpc); } \
3044 #define PRE_FIELD(MAYBE_STATIC, PUT_OR_GET) (void)(IMMEDIATE_u2);
3045 #define PRE_OBJECT(MAYBE_STATIC, PUT_OR_GET) (void)(IMMEDIATE_u2);
3046 #define PRE_INVOKE(MAYBE_STATIC, IS_INTERFACE) \
3047 (void)(IMMEDIATE_u2); \
3048 PC += 2 * IS_INTERFACE /* for invokeinterface */;
3050 #include "javaop.def"
3057 expand_byte_code (JCF *jcf, tree method)
3061 const unsigned char *linenumber_pointer;
3062 int dead_code_index = -1;
3063 unsigned char* byte_ops;
3064 long length = DECL_CODE_LENGTH (method);
3067 JCF_SEEK (jcf, DECL_CODE_OFFSET (method));
3068 byte_ops = jcf->read_ptr;
3070 /* We make an initial pass of the line number table, to note
3071 which instructions have associated line number entries. */
3072 linenumber_pointer = linenumber_table;
3073 for (i = 0; i < linenumber_count; i++)
3075 int pc = GET_u2 (linenumber_pointer);
3076 linenumber_pointer += 4;
3078 warning (0, "invalid PC in line number table");
3081 if ((instruction_bits[pc] & BCODE_HAS_LINENUMBER) != 0)
3082 instruction_bits[pc] |= BCODE_HAS_MULTI_LINENUMBERS;
3083 instruction_bits[pc] |= BCODE_HAS_LINENUMBER;
3087 if (! verify_jvm_instructions_new (jcf, byte_ops, length))
3090 promote_arguments ();
3092 /* Translate bytecodes. */
3093 linenumber_pointer = linenumber_table;
3094 for (PC = 0; PC < length;)
3096 if ((instruction_bits [PC] & BCODE_TARGET) != 0 || PC == 0)
3098 tree label = lookup_label (PC);
3099 flush_quick_stack ();
3100 if ((instruction_bits [PC] & BCODE_TARGET) != 0)
3101 java_add_stmt (build1 (LABEL_EXPR, void_type_node, label));
3102 if (LABEL_VERIFIED (label) || PC == 0)
3103 load_type_state (label);
3106 if (! (instruction_bits [PC] & BCODE_VERIFIED))
3108 if (dead_code_index == -1)
3110 /* This is the start of a region of unreachable bytecodes.
3111 They still need to be processed in order for EH ranges
3112 to get handled correctly. However, we can simply
3113 replace these bytecodes with nops. */
3114 dead_code_index = PC;
3117 /* Turn this bytecode into a nop. */
3122 if (dead_code_index != -1)
3124 /* We've just reached the end of a region of dead code. */
3126 warning (0, "unreachable bytecode from %d to before %d",
3127 dead_code_index, PC);
3128 dead_code_index = -1;
3132 /* Handle possible line number entry for this PC.
3134 This code handles out-of-order and multiple linenumbers per PC,
3135 but is optimized for the case of line numbers increasing
3136 monotonically with PC. */
3137 if ((instruction_bits[PC] & BCODE_HAS_LINENUMBER) != 0)
3139 if ((instruction_bits[PC] & BCODE_HAS_MULTI_LINENUMBERS) != 0
3140 || GET_u2 (linenumber_pointer) != PC)
3141 linenumber_pointer = linenumber_table;
3142 while (linenumber_pointer < linenumber_table + linenumber_count * 4)
3144 int pc = GET_u2 (linenumber_pointer);
3145 linenumber_pointer += 4;
3148 int line = GET_u2 (linenumber_pointer - 2);
3149 #ifdef USE_MAPPED_LOCATION
3150 input_location = linemap_line_start (&line_table, line, 1);
3152 input_location.line = line;
3154 if (!(instruction_bits[PC] & BCODE_HAS_MULTI_LINENUMBERS))
3159 maybe_pushlevels (PC);
3160 PC = process_jvm_instruction (PC, byte_ops, length);
3161 maybe_poplevels (PC);
3164 if (dead_code_index != -1)
3166 /* We've just reached the end of a region of dead code. */
3168 warning (0, "unreachable bytecode from %d to the end of the method",
3174 java_push_constant_from_pool (JCF *jcf, int index)
3177 if (JPOOL_TAG (jcf, index) == CONSTANT_String)
3180 name = get_name_constant (jcf, JPOOL_USHORT1 (jcf, index));
3181 index = alloc_name_constant (CONSTANT_String, name);
3182 c = build_ref_from_constant_pool (index);
3183 c = convert (promote_type (string_type_node), c);
3185 else if (JPOOL_TAG (jcf, index) == CONSTANT_Class
3186 || JPOOL_TAG (jcf, index) == CONSTANT_ResolvedClass)
3188 tree record = get_class_constant (jcf, index);
3189 c = build_class_ref (record);
3192 c = get_constant (jcf, index);
3197 process_jvm_instruction (int PC, const unsigned char* byte_ops,
3198 long length ATTRIBUTE_UNUSED)
3200 const char *opname; /* Temporary ??? */
3201 int oldpc = PC; /* PC at instruction start. */
3203 /* If the instruction is at the beginning of an exception handler,
3204 replace the top of the stack with the thrown object reference. */
3205 if (instruction_bits [PC] & BCODE_EXCEPTION_TARGET)
3207 /* Note that the verifier will not emit a type map at all for
3208 dead exception handlers. In this case we just ignore the
3210 if ((instruction_bits[PC] & BCODE_VERIFIED) != 0)
3212 tree type = pop_type (promote_type (throwable_type_node));
3213 push_value (build_exception_object_ref (type));
3217 switch (byte_ops[PC++])
3219 #define JAVAOP(OPNAME, OPCODE, OPKIND, OPERAND_TYPE, OPERAND_VALUE) \
3222 OPKIND(OPERAND_TYPE, OPERAND_VALUE); \
3225 #define RET(OPERAND_TYPE, OPERAND_VALUE) \
3227 int saw_index = 0; \
3228 int index = OPERAND_VALUE; \
3230 (find_local_variable (index, return_address_type_node, oldpc)); \
3233 #define JSR(OPERAND_TYPE, OPERAND_VALUE) \
3235 /* OPERAND_VALUE may have side-effects on PC */ \
3236 int opvalue = OPERAND_VALUE; \
3237 build_java_jsr (oldpc + opvalue, PC); \
3240 /* Push a constant onto the stack. */
3241 #define PUSHC(OPERAND_TYPE, OPERAND_VALUE) \
3242 { int saw_index = 0; int ival = (OPERAND_VALUE); \
3243 if (saw_index) java_push_constant_from_pool (current_jcf, ival); \
3244 else expand_java_pushc (ival, OPERAND_TYPE##_type_node); }
3246 /* internal macro added for use by the WIDE case */
3247 #define LOAD_INTERNAL(OPTYPE, OPVALUE) \
3248 expand_load_internal (OPVALUE, type_map[OPVALUE], oldpc);
3250 /* Push local variable onto the opcode stack. */
3251 #define LOAD(OPERAND_TYPE, OPERAND_VALUE) \
3253 /* have to do this since OPERAND_VALUE may have side-effects */ \
3254 int opvalue = OPERAND_VALUE; \
3255 LOAD_INTERNAL(OPERAND_TYPE##_type_node, opvalue); \
3258 #define RETURN(OPERAND_TYPE, OPERAND_VALUE) \
3259 expand_java_return (OPERAND_TYPE##_type_node)
3261 #define REM_EXPR TRUNC_MOD_EXPR
3262 #define BINOP(OPERAND_TYPE, OPERAND_VALUE) \
3263 expand_java_binop (OPERAND_TYPE##_type_node, OPERAND_VALUE##_EXPR)
3265 #define FIELD(IS_STATIC, IS_PUT) \
3266 expand_java_field_op (IS_STATIC, IS_PUT, IMMEDIATE_u2)
3268 #define TEST(OPERAND_TYPE, CONDITION) \
3269 expand_test (CONDITION##_EXPR, OPERAND_TYPE##_type_node, oldpc+IMMEDIATE_s2)
3271 #define COND(OPERAND_TYPE, CONDITION) \
3272 expand_cond (CONDITION##_EXPR, OPERAND_TYPE##_type_node, oldpc+IMMEDIATE_s2)
3274 #define BRANCH(OPERAND_TYPE, OPERAND_VALUE) \
3275 BRANCH_##OPERAND_TYPE (OPERAND_VALUE)
3277 #define BRANCH_GOTO(OPERAND_VALUE) \
3278 expand_java_goto (oldpc + OPERAND_VALUE)
3280 #define BRANCH_CALL(OPERAND_VALUE) \
3281 expand_java_call (oldpc + OPERAND_VALUE, oldpc)
3284 #define BRANCH_RETURN(OPERAND_VALUE) \
3286 tree type = OPERAND_TYPE##_type_node; \
3287 tree value = find_local_variable (OPERAND_VALUE, type, oldpc); \
3288 expand_java_ret (value); \
3292 #define NOT_IMPL(OPERAND_TYPE, OPERAND_VALUE) \
3293 fprintf (stderr, "%3d: %s ", oldpc, opname); \
3294 fprintf (stderr, "(not implemented)\n")
3295 #define NOT_IMPL1(OPERAND_VALUE) \
3296 fprintf (stderr, "%3d: %s ", oldpc, opname); \
3297 fprintf (stderr, "(not implemented)\n")
3299 #define BRANCH_RETURN(OPERAND_VALUE) NOT_IMPL1(OPERAND_VALUE)
3301 #define STACK(SUBOP, COUNT) STACK_##SUBOP (COUNT)
3303 #define STACK_POP(COUNT) java_stack_pop (COUNT)
3305 #define STACK_SWAP(COUNT) java_stack_swap()
3307 #define STACK_DUP(COUNT) java_stack_dup (COUNT, 0)
3308 #define STACK_DUPx1(COUNT) java_stack_dup (COUNT, 1)
3309 #define STACK_DUPx2(COUNT) java_stack_dup (COUNT, 2)
3311 #define SWITCH(OPERAND_TYPE, TABLE_OR_LOOKUP) \
3312 PC = (PC + 3) / 4 * 4; TABLE_OR_LOOKUP##_SWITCH
3314 #define LOOKUP_SWITCH \
3315 { jint default_offset = IMMEDIATE_s4; jint npairs = IMMEDIATE_s4; \
3316 tree selector = pop_value (INT_type_node); \
3317 tree switch_expr = expand_java_switch (selector, oldpc + default_offset); \
3318 while (--npairs >= 0) \
3320 jint match = IMMEDIATE_s4; jint offset = IMMEDIATE_s4; \
3321 expand_java_add_case (switch_expr, match, oldpc + offset); \
3325 #define TABLE_SWITCH \
3326 { jint default_offset = IMMEDIATE_s4; \
3327 jint low = IMMEDIATE_s4; jint high = IMMEDIATE_s4; \
3328 tree selector = pop_value (INT_type_node); \
3329 tree switch_expr = expand_java_switch (selector, oldpc + default_offset); \
3330 for (; low <= high; low++) \
3332 jint offset = IMMEDIATE_s4; \
3333 expand_java_add_case (switch_expr, low, oldpc + offset); \
3337 #define INVOKE(MAYBE_STATIC, IS_INTERFACE) \
3338 { int opcode = byte_ops[PC-1]; \
3339 int method_ref_index = IMMEDIATE_u2; \
3341 if (IS_INTERFACE) { nargs = IMMEDIATE_u1; (void) IMMEDIATE_u1; } \
3343 expand_invoke (opcode, method_ref_index, nargs); \
3346 /* Handle new, checkcast, instanceof */
3347 #define OBJECT(TYPE, OP) \
3348 expand_java_##OP (get_class_constant (current_jcf, IMMEDIATE_u2))
3350 #define ARRAY(OPERAND_TYPE, SUBOP) ARRAY_##SUBOP(OPERAND_TYPE)
3352 #define ARRAY_LOAD(OPERAND_TYPE) \
3354 expand_java_arrayload( OPERAND_TYPE##_type_node ); \
3357 #define ARRAY_STORE(OPERAND_TYPE) \
3359 expand_java_arraystore( OPERAND_TYPE##_type_node ); \
3362 #define ARRAY_LENGTH(OPERAND_TYPE) expand_java_array_length();
3363 #define ARRAY_NEW(OPERAND_TYPE) ARRAY_NEW_##OPERAND_TYPE()
3364 #define ARRAY_NEW_PTR() \
3365 push_value (build_anewarray (get_class_constant (current_jcf, \
3367 pop_value (int_type_node)));
3368 #define ARRAY_NEW_NUM() \
3370 int atype = IMMEDIATE_u1; \
3371 push_value (build_newarray (atype, pop_value (int_type_node)));\
3373 #define ARRAY_NEW_MULTI() \
3375 tree class = get_class_constant (current_jcf, IMMEDIATE_u2 ); \
3376 int ndims = IMMEDIATE_u1; \
3377 expand_java_multianewarray( class, ndims ); \
3380 #define UNOP(OPERAND_TYPE, OPERAND_VALUE) \
3381 push_value (fold_build1 (NEGATE_EXPR, OPERAND_TYPE##_type_node, \
3382 pop_value (OPERAND_TYPE##_type_node)));
3384 #define CONVERT2(FROM_TYPE, TO_TYPE) \
3386 push_value (build1 (NOP_EXPR, int_type_node, \
3387 (convert (TO_TYPE##_type_node, \
3388 pop_value (FROM_TYPE##_type_node))))); \
3391 #define CONVERT(FROM_TYPE, TO_TYPE) \
3393 push_value (convert (TO_TYPE##_type_node, \
3394 pop_value (FROM_TYPE##_type_node))); \
3397 /* internal macro added for use by the WIDE case
3398 Added TREE_TYPE (decl) assignment, apbianco */
3399 #define STORE_INTERNAL(OPTYPE, OPVALUE) \
3402 int index = OPVALUE; \
3403 tree type = OPTYPE; \
3404 value = pop_value (type); \
3405 type = TREE_TYPE (value); \
3406 decl = find_local_variable (index, type, oldpc); \
3407 set_local_type (index, type); \
3408 java_add_stmt (build2 (MODIFY_EXPR, type, decl, value)); \
3411 #define STORE(OPERAND_TYPE, OPERAND_VALUE) \
3413 /* have to do this since OPERAND_VALUE may have side-effects */ \
3414 int opvalue = OPERAND_VALUE; \
3415 STORE_INTERNAL(OPERAND_TYPE##_type_node, opvalue); \
3418 #define SPECIAL(OPERAND_TYPE, INSTRUCTION) \
3419 SPECIAL_##INSTRUCTION(OPERAND_TYPE)
3421 #define SPECIAL_ENTER(IGNORED) MONITOR_OPERATION (soft_monitorenter_node)
3422 #define SPECIAL_EXIT(IGNORED) MONITOR_OPERATION (soft_monitorexit_node)
3424 #define MONITOR_OPERATION(call) \
3426 tree o = pop_value (ptr_type_node); \
3428 flush_quick_stack (); \
3429 c = build_java_monitor (call, o); \
3430 TREE_SIDE_EFFECTS (c) = 1; \
3431 java_add_stmt (c); \
3434 #define SPECIAL_IINC(IGNORED) \
3436 unsigned int local_var_index = IMMEDIATE_u1; \
3437 int ival = IMMEDIATE_s1; \
3438 expand_iinc(local_var_index, ival, oldpc); \
3441 #define SPECIAL_WIDE(IGNORED) \
3443 int modified_opcode = IMMEDIATE_u1; \
3444 unsigned int local_var_index = IMMEDIATE_u2; \
3445 switch (modified_opcode) \
3449 int ival = IMMEDIATE_s2; \
3450 expand_iinc (local_var_index, ival, oldpc); \
3453 case OPCODE_iload: \
3454 case OPCODE_lload: \
3455 case OPCODE_fload: \
3456 case OPCODE_dload: \
3457 case OPCODE_aload: \
3459 /* duplicate code from LOAD macro */ \
3460 LOAD_INTERNAL(operand_type[modified_opcode], local_var_index); \
3463 case OPCODE_istore: \
3464 case OPCODE_lstore: \
3465 case OPCODE_fstore: \
3466 case OPCODE_dstore: \
3467 case OPCODE_astore: \
3469 STORE_INTERNAL(operand_type[modified_opcode], local_var_index); \
3473 error ("unrecogized wide sub-instruction"); \
3477 #define SPECIAL_THROW(IGNORED) \
3478 build_java_athrow (pop_value (throwable_type_node))
3480 #define SPECIAL_BREAK NOT_IMPL1
3481 #define IMPL NOT_IMPL
3483 #include "javaop.def"
3486 fprintf (stderr, "%3d: unknown(%3d)\n", oldpc, byte_ops[PC]);
3491 /* Return the opcode at PC in the code section pointed to by
3494 static unsigned char
3495 peek_opcode_at_pc (JCF *jcf, int code_offset, int pc)
3497 unsigned char opcode;
3498 long absolute_offset = (long)JCF_TELL (jcf);
3500 JCF_SEEK (jcf, code_offset);
3501 opcode = jcf->read_ptr [pc];
3502 JCF_SEEK (jcf, absolute_offset);
3506 /* Some bytecode compilers are emitting accurate LocalVariableTable
3507 attributes. Here's an example:
3512 Attribute "LocalVariableTable"
3513 slot #<n>: ... (PC: PC+1 length: L)
3515 This is accurate because the local in slot <n> really exists after
3516 the opcode at PC is executed, hence from PC+1 to PC+1+L.
3518 This procedure recognizes this situation and extends the live range
3519 of the local in SLOT to START_PC-1 or START_PC-2 (depending on the
3520 length of the store instruction.)
3522 This function is used by `give_name_to_locals' so that a local's
3523 DECL features a DECL_LOCAL_START_PC such that the first related
3524 store operation will use DECL as a destination, not an unrelated
3525 temporary created for the occasion.
3527 This function uses a global (instruction_bits) `note_instructions' should
3528 have allocated and filled properly. */
3531 maybe_adjust_start_pc (struct JCF *jcf, int code_offset,
3532 int start_pc, int slot)
3534 int first, index, opcode;
3543 /* Find last previous instruction and remember it */
3544 for (pc = start_pc-1; pc; pc--)
3545 if (instruction_bits [pc] & BCODE_INSTRUCTION_START)
3549 /* Retrieve the instruction, handle `wide'. */
3550 opcode = (int) peek_opcode_at_pc (jcf, code_offset, pc++);
3551 if (opcode == OPCODE_wide)
3554 opcode = (int) peek_opcode_at_pc (jcf, code_offset, pc++);
3559 case OPCODE_astore_0:
3560 case OPCODE_astore_1:
3561 case OPCODE_astore_2:
3562 case OPCODE_astore_3:
3563 first = OPCODE_astore_0;
3566 case OPCODE_istore_0:
3567 case OPCODE_istore_1:
3568 case OPCODE_istore_2:
3569 case OPCODE_istore_3:
3570 first = OPCODE_istore_0;
3573 case OPCODE_lstore_0:
3574 case OPCODE_lstore_1:
3575 case OPCODE_lstore_2:
3576 case OPCODE_lstore_3:
3577 first = OPCODE_lstore_0;
3580 case OPCODE_fstore_0:
3581 case OPCODE_fstore_1:
3582 case OPCODE_fstore_2:
3583 case OPCODE_fstore_3:
3584 first = OPCODE_fstore_0;
3587 case OPCODE_dstore_0:
3588 case OPCODE_dstore_1:
3589 case OPCODE_dstore_2:
3590 case OPCODE_dstore_3:
3591 first = OPCODE_dstore_0;
3599 index = peek_opcode_at_pc (jcf, code_offset, pc);
3602 int other = peek_opcode_at_pc (jcf, code_offset, ++pc);
3603 index = (other << 8) + index;
3608 /* Now we decide: first >0 means we have a <t>store_<n>, index >0
3609 means we have a <t>store. */
3610 if ((first > 0 && opcode - first == slot) || (index > 0 && index == slot))
3616 /* Force the (direct) sub-operands of NODE to be evaluated in left-to-right
3617 order, as specified by Java Language Specification.
3619 The problem is that while expand_expr will evaluate its sub-operands in
3620 left-to-right order, for variables it will just return an rtx (i.e.
3621 an lvalue) for the variable (rather than an rvalue). So it is possible
3622 that a later sub-operand will change the register, and when the
3623 actual operation is done, it will use the new value, when it should
3624 have used the original value.
3626 We fix this by using save_expr. This forces the sub-operand to be
3627 copied into a fresh virtual register,
3629 For method invocation, we modify the arguments so that a
3630 left-to-right order evaluation is performed. Saved expressions
3631 will, in CALL_EXPR order, be reused when the call will be expanded.
3633 We also promote outgoing args if needed. */
3636 force_evaluation_order (tree node)
3638 if (flag_syntax_only)
3640 if (TREE_CODE (node) == CALL_EXPR
3641 || TREE_CODE (node) == NEW_CLASS_EXPR
3642 || (TREE_CODE (node) == COMPOUND_EXPR
3643 && TREE_CODE (TREE_OPERAND (node, 0)) == CALL_EXPR
3644 && TREE_CODE (TREE_OPERAND (node, 1)) == SAVE_EXPR))
3650 /* Position arg properly, account for wrapped around ctors. */
3651 if (TREE_CODE (node) == COMPOUND_EXPR)
3652 arg = TREE_OPERAND (node, 0);
3654 arg = TREE_OPERAND (arg, 1);
3656 /* An empty argument list is ok, just ignore it. */
3660 /* Not having a list of arguments here is an error. */
3661 gcc_assert (TREE_CODE (arg) == TREE_LIST);
3663 /* This reverses the evaluation order. This is a desired effect. */
3664 for (cmp = NULL_TREE; arg; arg = TREE_CHAIN (arg))
3666 /* Promote types smaller than integer. This is required by
3668 tree type = TREE_TYPE (TREE_VALUE (arg));
3670 if (targetm.calls.promote_prototypes (type)
3671 && INTEGRAL_TYPE_P (type)
3672 && INT_CST_LT_UNSIGNED (TYPE_SIZE (type),
3673 TYPE_SIZE (integer_type_node)))
3674 TREE_VALUE (arg) = fold_convert (integer_type_node, TREE_VALUE (arg));
3676 saved = save_expr (force_evaluation_order (TREE_VALUE (arg)));
3677 cmp = (cmp == NULL_TREE ? saved :
3678 build2 (COMPOUND_EXPR, void_type_node, cmp, saved));
3679 TREE_VALUE (arg) = saved;
3682 if (cmp && TREE_CODE (cmp) == COMPOUND_EXPR)
3683 TREE_SIDE_EFFECTS (cmp) = 1;
3687 cmp = build2 (COMPOUND_EXPR, TREE_TYPE (node), cmp, node);
3688 if (TREE_TYPE (cmp) != void_type_node)
3689 cmp = save_expr (cmp);
3690 CAN_COMPLETE_NORMALLY (cmp) = CAN_COMPLETE_NORMALLY (node);
3691 TREE_SIDE_EFFECTS (cmp) = 1;
3698 /* EXPR_WITH_FILE_LOCATION are used to keep track of the exact
3699 location where an expression or an identifier were encountered. It
3700 is necessary for languages where the frontend parser will handle
3701 recursively more than one file (Java is one of them). */
3704 build_expr_wfl (tree node,
3705 #ifdef USE_MAPPED_LOCATION
3706 source_location location
3708 const char *file, int line, int col
3714 #ifdef USE_MAPPED_LOCATION
3715 wfl = make_node (EXPR_WITH_FILE_LOCATION);
3716 SET_EXPR_LOCATION (wfl, location);
3718 static const char *last_file = 0;
3719 static tree last_filenode = NULL_TREE;
3721 wfl = make_node (EXPR_WITH_FILE_LOCATION);
3723 EXPR_WFL_SET_LINECOL (wfl, line, col);
3724 if (file != last_file)
3727 last_filenode = file ? get_identifier (file) : NULL_TREE;
3729 EXPR_WFL_FILENAME_NODE (wfl) = last_filenode;
3731 EXPR_WFL_NODE (wfl) = node;
3735 TREE_SIDE_EFFECTS (wfl) = TREE_SIDE_EFFECTS (node);
3736 TREE_TYPE (wfl) = TREE_TYPE (node);
3742 #ifdef USE_MAPPED_LOCATION
3744 expr_add_location (tree node, source_location location, bool statement)
3748 /* FIXME. This optimization causes failures in code that expects an
3749 EXPR_WITH_FILE_LOCATION. E.g. in resolve_qualified_expression_name. */
3750 if (node && ! (statement && flag_emit_class_files))
3752 source_location node_loc = EXPR_LOCATION (node);
3753 if (node_loc == location || location == UNKNOWN_LOCATION)
3755 if (node_loc == UNKNOWN_LOCATION
3756 && IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (TREE_CODE (node))))
3758 SET_EXPR_LOCATION (node, location);
3763 wfl = make_node (EXPR_WITH_FILE_LOCATION);
3764 SET_EXPR_LOCATION (wfl, location);
3765 EXPR_WFL_NODE (wfl) = node;
3766 if (statement && debug_info_level != DINFO_LEVEL_NONE)
3767 EXPR_WFL_EMIT_LINE_NOTE (wfl) = 1;
3771 TREE_SIDE_EFFECTS (wfl) = TREE_SIDE_EFFECTS (node);
3772 TREE_TYPE (wfl) = TREE_TYPE (node);
3779 /* Build a node to represent empty statements and blocks. */
3782 build_java_empty_stmt (void)
3784 tree t = build_empty_stmt ();
3785 CAN_COMPLETE_NORMALLY (t) = 1;
3789 /* Promote all args of integral type before generating any code. */
3792 promote_arguments (void)
3796 for (arg = DECL_ARGUMENTS (current_function_decl), i = 0;
3797 arg != NULL_TREE; arg = TREE_CHAIN (arg), i++)
3799 tree arg_type = TREE_TYPE (arg);
3800 if (INTEGRAL_TYPE_P (arg_type)
3801 && TYPE_PRECISION (arg_type) < 32)
3803 tree copy = find_local_variable (i, integer_type_node, -1);
3804 java_add_stmt (build2 (MODIFY_EXPR, integer_type_node,
3806 fold_convert (integer_type_node, arg)));
3808 if (TYPE_IS_WIDE (arg_type))
3813 #include "gt-java-expr.h"