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
3 Free Software Foundation, Inc.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GCC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA.
22 Java and all Java-based marks are trademarks or registered trademarks
23 of Sun Microsystems, Inc. in the United States and other countries.
24 The Free Software Foundation is independent of Sun Microsystems, Inc. */
26 /* Hacked by Per Bothner <bothner@cygnus.com> February 1996. */
30 #include "coretypes.h"
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 stack pointer of the Java virtual machine.
134 This does include the size of the quick_stack. */
138 const unsigned char *linenumber_table;
139 int linenumber_count;
142 init_expr_processing (void)
144 operand_type[21] = operand_type[54] = int_type_node;
145 operand_type[22] = operand_type[55] = long_type_node;
146 operand_type[23] = operand_type[56] = float_type_node;
147 operand_type[24] = operand_type[57] = double_type_node;
148 operand_type[25] = operand_type[58] = ptr_type_node;
152 java_truthvalue_conversion (tree expr)
154 /* It is simpler and generates better code to have only TRUTH_*_EXPR
155 or comparison expressions as truth values at this level.
157 This function should normally be identity for Java. */
159 switch (TREE_CODE (expr))
161 case EQ_EXPR: case NE_EXPR: case UNEQ_EXPR: case LTGT_EXPR:
162 case LE_EXPR: case GE_EXPR: case LT_EXPR: case GT_EXPR:
163 case UNLE_EXPR: case UNGE_EXPR: case UNLT_EXPR: case UNGT_EXPR:
164 case ORDERED_EXPR: case UNORDERED_EXPR:
165 case TRUTH_ANDIF_EXPR:
166 case TRUTH_ORIF_EXPR:
175 return integer_zerop (expr) ? boolean_false_node : boolean_true_node;
178 return real_zerop (expr) ? boolean_false_node : boolean_true_node;
180 /* are these legal? XXX JH */
184 /* These don't change whether an object is nonzero or zero. */
185 return java_truthvalue_conversion (TREE_OPERAND (expr, 0));
188 /* Distribute the conversion into the arms of a COND_EXPR. */
190 (build3 (COND_EXPR, boolean_type_node, TREE_OPERAND (expr, 0),
191 java_truthvalue_conversion (TREE_OPERAND (expr, 1)),
192 java_truthvalue_conversion (TREE_OPERAND (expr, 2))));
195 /* If this is widening the argument, we can ignore it. */
196 if (TYPE_PRECISION (TREE_TYPE (expr))
197 >= TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (expr, 0))))
198 return java_truthvalue_conversion (TREE_OPERAND (expr, 0));
199 /* fall through to default */
202 return fold (build2 (NE_EXPR, boolean_type_node,
203 expr, boolean_false_node));
207 /* Save any stack slots that happen to be in the quick_stack into their
208 home virtual register slots.
210 The copy order is from low stack index to high, to support the invariant
211 that the expression for a slot may contain decls for stack slots with
212 higher (or the same) index, but not lower. */
215 flush_quick_stack (void)
217 int stack_index = stack_pointer;
218 tree prev, cur, next;
220 /* First reverse the quick_stack, and count the number of slots it has. */
221 for (cur = quick_stack, prev = NULL_TREE; cur != NULL_TREE; cur = next)
223 next = TREE_CHAIN (cur);
224 TREE_CHAIN (cur) = prev;
226 stack_index -= 1 + TYPE_IS_WIDE (TREE_TYPE (TREE_VALUE (cur)));
230 while (quick_stack != NULL_TREE)
233 tree node = quick_stack, type;
234 quick_stack = TREE_CHAIN (node);
235 TREE_CHAIN (node) = tree_list_free_list;
236 tree_list_free_list = node;
237 node = TREE_VALUE (node);
238 type = TREE_TYPE (node);
240 decl = find_stack_slot (stack_index, type);
242 java_add_stmt (build2 (MODIFY_EXPR, TREE_TYPE (node), decl, node));
243 stack_index += 1 + TYPE_IS_WIDE (type);
247 /* Push TYPE on the type stack.
248 Return true on success, 0 on overflow. */
251 push_type_0 (tree type)
254 type = promote_type (type);
255 n_words = 1 + TYPE_IS_WIDE (type);
256 if (stack_pointer + n_words > DECL_MAX_STACK (current_function_decl))
258 /* Allocate decl for this variable now, so we get a temporary that
259 survives the whole method. */
260 find_stack_slot (stack_pointer, type);
261 stack_type_map[stack_pointer++] = type;
263 while (--n_words >= 0)
264 stack_type_map[stack_pointer++] = TYPE_SECOND;
269 push_type (tree type)
271 if (! push_type_0 (type))
276 push_value (tree value)
278 tree type = TREE_TYPE (value);
279 if (TYPE_PRECISION (type) < 32 && INTEGRAL_TYPE_P (type))
281 type = promote_type (type);
282 value = convert (type, value);
285 if (tree_list_free_list == NULL_TREE)
286 quick_stack = tree_cons (NULL_TREE, value, quick_stack);
289 tree node = tree_list_free_list;
290 tree_list_free_list = TREE_CHAIN (tree_list_free_list);
291 TREE_VALUE (node) = value;
292 TREE_CHAIN (node) = quick_stack;
297 /* Pop a type from the type stack.
298 TYPE is the expected type. Return the actual type, which must be
300 On an error, *MESSAGEP is set to a freshly malloc'd error message. */
303 pop_type_0 (tree type, char **messagep)
308 if (TREE_CODE (type) == RECORD_TYPE)
309 type = promote_type (type);
310 n_words = 1 + TYPE_IS_WIDE (type);
311 if (stack_pointer < n_words)
313 *messagep = xstrdup ("stack underflow");
316 while (--n_words > 0)
318 if (stack_type_map[--stack_pointer] != void_type_node)
320 *messagep = xstrdup ("Invalid multi-word value on type stack");
324 t = stack_type_map[--stack_pointer];
325 if (type == NULL_TREE || t == type)
327 if (TREE_CODE (t) == TREE_LIST)
331 tree tt = TREE_PURPOSE (t);
332 if (! can_widen_reference_to (tt, type))
342 if (INTEGRAL_TYPE_P (type) && INTEGRAL_TYPE_P (t)
343 && TYPE_PRECISION (type) <= 32 && TYPE_PRECISION (t) <= 32)
345 if (TREE_CODE (type) == POINTER_TYPE && TREE_CODE (t) == POINTER_TYPE)
347 if (flag_new_verifier)
349 /* Since the verifier has already run, we know that any
350 types we see will be compatible. In BC mode, this fact
351 may be checked at runtime, but if that is so then we can
352 assume its truth here as well. So, we always succeed
353 here, with the expected type. */
358 if (type == ptr_type_node || type == object_ptr_type_node)
360 else if (t == ptr_type_node) /* Special case for null reference. */
362 /* This is a kludge, but matches what Sun's verifier does.
363 It can be tricked, but is safe as long as type errors
364 (i.e. interface method calls) are caught at run-time. */
365 else if (CLASS_INTERFACE (TYPE_NAME (TREE_TYPE (type))))
366 return object_ptr_type_node;
367 else if (can_widen_reference_to (t, type))
372 if (! flag_verify_invocations && flag_indirect_dispatch
373 && t == object_ptr_type_node)
375 if (type != ptr_type_node)
376 warning (0, "need to insert runtime check for %s",
377 xstrdup (lang_printable_name (type, 0)));
381 /* lang_printable_name uses a static buffer, so we must save the result
382 from calling it the first time. */
385 char *temp = xstrdup (lang_printable_name (type, 0));
386 /* If the stack contains a multi-word type, keep popping the stack until
387 the real type is found. */
388 while (t == void_type_node)
389 t = stack_type_map[--stack_pointer];
390 *messagep = concat ("expected type '", temp,
391 "' but stack contains '", lang_printable_name (t, 0),
398 /* Pop a type from the type stack.
399 TYPE is the expected type. Return the actual type, which must be
400 convertible to TYPE, otherwise call error. */
405 char *message = NULL;
406 type = pop_type_0 (type, &message);
409 error ("%s", message);
416 /* Return true if two type assertions are equal. */
419 type_assertion_eq (const void * k1_p, const void * k2_p)
421 type_assertion k1 = *(type_assertion *)k1_p;
422 type_assertion k2 = *(type_assertion *)k2_p;
423 return (k1.assertion_code == k2.assertion_code
425 && k1.op2 == k2.op2);
428 /* Hash a type assertion. */
431 type_assertion_hash (const void *p)
433 const type_assertion *k_p = p;
434 hashval_t hash = iterative_hash (&k_p->assertion_code, sizeof
435 k_p->assertion_code, 0);
436 hash = iterative_hash (&k_p->op1, sizeof k_p->op1, hash);
437 return iterative_hash (&k_p->op2, sizeof k_p->op2, hash);
440 /* Add an entry to the type assertion table for the given class.
441 CLASS is the class for which this assertion will be evaluated by the
442 runtime during loading/initialization.
443 ASSERTION_CODE is the 'opcode' or type of this assertion: see java-tree.h.
444 OP1 and OP2 are the operands. The tree type of these arguments may be
445 specific to each assertion_code. */
448 add_type_assertion (tree class, int assertion_code, tree op1, tree op2)
450 htab_t assertions_htab;
454 assertions_htab = TYPE_ASSERTIONS (class);
455 if (assertions_htab == NULL)
457 assertions_htab = htab_create_ggc (7, type_assertion_hash,
458 type_assertion_eq, NULL);
459 TYPE_ASSERTIONS (current_class) = assertions_htab;
462 as.assertion_code = assertion_code;
466 as_pp = htab_find_slot (assertions_htab, &as, INSERT);
468 /* Don't add the same assertion twice. */
472 *as_pp = ggc_alloc (sizeof (type_assertion));
473 **(type_assertion **)as_pp = as;
477 /* Return 1 if SOURCE_TYPE can be safely widened to TARGET_TYPE.
478 Handles array types and interfaces. */
481 can_widen_reference_to (tree source_type, tree target_type)
483 if (source_type == ptr_type_node || target_type == object_ptr_type_node)
486 /* Get rid of pointers */
487 if (TREE_CODE (source_type) == POINTER_TYPE)
488 source_type = TREE_TYPE (source_type);
489 if (TREE_CODE (target_type) == POINTER_TYPE)
490 target_type = TREE_TYPE (target_type);
492 if (source_type == target_type)
495 /* FIXME: This is very pessimistic, in that it checks everything,
496 even if we already know that the types are compatible. If we're
497 to support full Java class loader semantics, we need this.
498 However, we could do something more optimal. */
499 if (! flag_verify_invocations)
501 add_type_assertion (current_class, JV_ASSERT_TYPES_COMPATIBLE,
502 source_type, target_type);
505 warning (0, "assert: %s is assign compatible with %s",
506 xstrdup (lang_printable_name (target_type, 0)),
507 xstrdup (lang_printable_name (source_type, 0)));
508 /* Punt everything to runtime. */
512 if (TYPE_DUMMY (source_type) || TYPE_DUMMY (target_type))
518 if (TYPE_ARRAY_P (source_type) || TYPE_ARRAY_P (target_type))
520 HOST_WIDE_INT source_length, target_length;
521 if (TYPE_ARRAY_P (source_type) != TYPE_ARRAY_P (target_type))
523 /* An array implements Cloneable and Serializable. */
524 tree name = DECL_NAME (TYPE_NAME (target_type));
525 return (name == java_lang_cloneable_identifier_node
526 || name == java_io_serializable_identifier_node);
528 target_length = java_array_type_length (target_type);
529 if (target_length >= 0)
531 source_length = java_array_type_length (source_type);
532 if (source_length != target_length)
535 source_type = TYPE_ARRAY_ELEMENT (source_type);
536 target_type = TYPE_ARRAY_ELEMENT (target_type);
537 if (source_type == target_type)
539 if (TREE_CODE (source_type) != POINTER_TYPE
540 || TREE_CODE (target_type) != POINTER_TYPE)
542 return can_widen_reference_to (source_type, target_type);
546 int source_depth = class_depth (source_type);
547 int target_depth = class_depth (target_type);
549 if (TYPE_DUMMY (source_type) || TYPE_DUMMY (target_type))
552 warning (0, "assert: %s is assign compatible with %s",
553 xstrdup (lang_printable_name (target_type, 0)),
554 xstrdup (lang_printable_name (source_type, 0)));
558 /* class_depth can return a negative depth if an error occurred */
559 if (source_depth < 0 || target_depth < 0)
562 if (CLASS_INTERFACE (TYPE_NAME (target_type)))
564 /* target_type is OK if source_type or source_type ancestors
565 implement target_type. We handle multiple sub-interfaces */
566 tree binfo, base_binfo;
569 for (binfo = TYPE_BINFO (source_type), i = 0;
570 BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
571 if (can_widen_reference_to
572 (BINFO_TYPE (base_binfo), target_type))
579 for ( ; source_depth > target_depth; source_depth--)
582 = BINFO_TYPE (BINFO_BASE_BINFO (TYPE_BINFO (source_type), 0));
584 return source_type == target_type;
590 pop_value (tree type)
592 type = pop_type (type);
595 tree node = quick_stack;
596 quick_stack = TREE_CHAIN (quick_stack);
597 TREE_CHAIN (node) = tree_list_free_list;
598 tree_list_free_list = node;
599 node = TREE_VALUE (node);
603 return find_stack_slot (stack_pointer, promote_type (type));
607 /* Pop and discard the top COUNT stack slots. */
610 java_stack_pop (int count)
616 if (stack_pointer == 0)
619 type = stack_type_map[stack_pointer - 1];
620 if (type == TYPE_SECOND)
623 if (stack_pointer == 1 || count <= 0)
626 type = stack_type_map[stack_pointer - 2];
628 val = pop_value (type);
633 /* Implement the 'swap' operator (to swap two top stack slots). */
636 java_stack_swap (void)
642 if (stack_pointer < 2
643 || (type1 = stack_type_map[stack_pointer - 1]) == TYPE_UNKNOWN
644 || (type2 = stack_type_map[stack_pointer - 2]) == TYPE_UNKNOWN
645 || type1 == TYPE_SECOND || type2 == TYPE_SECOND
646 || TYPE_IS_WIDE (type1) || TYPE_IS_WIDE (type2))
647 /* Bad stack swap. */
650 flush_quick_stack ();
651 decl1 = find_stack_slot (stack_pointer - 1, type1);
652 decl2 = find_stack_slot (stack_pointer - 2, type2);
653 temp = build_decl (VAR_DECL, NULL_TREE, type1);
654 java_add_local_var (temp);
655 java_add_stmt (build2 (MODIFY_EXPR, type1, temp, decl1));
656 java_add_stmt (build2 (MODIFY_EXPR, type2,
657 find_stack_slot (stack_pointer - 1, type2),
659 java_add_stmt (build2 (MODIFY_EXPR, type1,
660 find_stack_slot (stack_pointer - 2, type1),
662 stack_type_map[stack_pointer - 1] = type2;
663 stack_type_map[stack_pointer - 2] = type1;
667 java_stack_dup (int size, int offset)
669 int low_index = stack_pointer - size - offset;
672 error ("stack underflow - dup* operation");
674 flush_quick_stack ();
676 stack_pointer += size;
677 dst_index = stack_pointer;
679 for (dst_index = stack_pointer; --dst_index >= low_index; )
682 int src_index = dst_index - size;
683 if (src_index < low_index)
684 src_index = dst_index + size + offset;
685 type = stack_type_map [src_index];
686 if (type == TYPE_SECOND)
688 if (src_index <= low_index)
689 /* Dup operation splits 64-bit number. */
692 stack_type_map[dst_index] = type;
693 src_index--; dst_index--;
694 type = stack_type_map[src_index];
695 if (! TYPE_IS_WIDE (type))
698 else if (TYPE_IS_WIDE (type))
701 if (src_index != dst_index)
703 tree src_decl = find_stack_slot (src_index, type);
704 tree dst_decl = find_stack_slot (dst_index, type);
707 (build2 (MODIFY_EXPR, TREE_TYPE (dst_decl), dst_decl, src_decl));
708 stack_type_map[dst_index] = type;
713 /* Calls _Jv_Throw or _Jv_Sjlj_Throw. Discard the contents of the
717 build_java_athrow (tree node)
721 call = build3 (CALL_EXPR,
723 build_address_of (throw_node),
724 build_tree_list (NULL_TREE, node),
726 TREE_SIDE_EFFECTS (call) = 1;
727 java_add_stmt (call);
728 java_stack_pop (stack_pointer);
731 /* Implementation for jsr/ret */
734 build_java_jsr (int target_pc, int return_pc)
736 tree where = lookup_label (target_pc);
737 tree ret = lookup_label (return_pc);
738 tree ret_label = fold (build1 (ADDR_EXPR, return_address_type_node, ret));
739 push_value (ret_label);
740 flush_quick_stack ();
741 java_add_stmt (build1 (GOTO_EXPR, void_type_node, where));
743 /* Do not need to emit the label here. We noted the existence of the
744 label as a jump target in note_instructions; we'll emit the label
745 for real at the beginning of the expand_byte_code loop. */
749 build_java_ret (tree location)
751 java_add_stmt (build1 (GOTO_EXPR, void_type_node, location));
754 /* Implementation of operations on array: new, load, store, length */
757 decode_newarray_type (int atype)
761 case 4: return boolean_type_node;
762 case 5: return char_type_node;
763 case 6: return float_type_node;
764 case 7: return double_type_node;
765 case 8: return byte_type_node;
766 case 9: return short_type_node;
767 case 10: return int_type_node;
768 case 11: return long_type_node;
769 default: return NULL_TREE;
773 /* Map primitive type to the code used by OPCODE_newarray. */
776 encode_newarray_type (tree type)
778 if (type == boolean_type_node)
780 else if (type == char_type_node)
782 else if (type == float_type_node)
784 else if (type == double_type_node)
786 else if (type == byte_type_node)
788 else if (type == short_type_node)
790 else if (type == int_type_node)
792 else if (type == long_type_node)
798 /* Build a call to _Jv_ThrowBadArrayIndex(), the
799 ArrayIndexOfBoundsException exception handler. */
802 build_java_throw_out_of_bounds_exception (tree index)
804 tree node = build3 (CALL_EXPR, int_type_node,
805 build_address_of (soft_badarrayindex_node),
806 build_tree_list (NULL_TREE, index), NULL_TREE);
807 TREE_SIDE_EFFECTS (node) = 1; /* Allows expansion within ANDIF */
811 /* Return the length of an array. Doesn't perform any checking on the nature
812 or value of the array NODE. May be used to implement some bytecodes. */
815 build_java_array_length_access (tree node)
817 tree type = TREE_TYPE (node);
818 tree array_type = TREE_TYPE (type);
819 HOST_WIDE_INT length;
821 if (!is_array_type_p (type))
823 /* With the new verifier, we will see an ordinary pointer type
824 here. In this case, we just use an arbitrary array type. */
825 array_type = build_java_array_type (object_ptr_type_node, -1);
826 type = promote_type (array_type);
829 length = java_array_type_length (type);
831 return build_int_cst (NULL_TREE, length);
833 node = build3 (COMPONENT_REF, int_type_node,
834 build_java_indirect_ref (array_type, node,
835 flag_check_references),
836 lookup_field (&array_type, get_identifier ("length")),
838 IS_ARRAY_LENGTH_ACCESS (node) = 1;
842 /* Optionally checks a reference against the NULL pointer. ARG1: the
843 expr, ARG2: we should check the reference. Don't generate extra
844 checks if we're not generating code. */
847 java_check_reference (tree expr, int check)
849 if (!flag_syntax_only && check)
851 expr = save_expr (expr);
852 expr = build3 (COND_EXPR, TREE_TYPE (expr),
853 build2 (EQ_EXPR, boolean_type_node,
854 expr, null_pointer_node),
855 build3 (CALL_EXPR, void_type_node,
856 build_address_of (soft_nullpointer_node),
857 NULL_TREE, NULL_TREE),
864 /* Reference an object: just like an INDIRECT_REF, but with checking. */
867 build_java_indirect_ref (tree type, tree expr, int check)
870 t = java_check_reference (expr, check);
871 t = convert (build_pointer_type (type), t);
872 return build1 (INDIRECT_REF, type, t);
875 /* Implement array indexing (either as l-value or r-value).
876 Returns a tree for ARRAY[INDEX], assume TYPE is the element type.
877 Optionally performs bounds checking and/or test to NULL.
878 At this point, ARRAY should have been verified as an array. */
881 build_java_arrayaccess (tree array, tree type, tree index)
883 tree node, throw = NULL_TREE;
886 tree array_type = TREE_TYPE (TREE_TYPE (array));
888 if (!is_array_type_p (TREE_TYPE (array)))
890 /* With the new verifier, we will see an ordinary pointer type
891 here. In this case, we just use the correct array type. */
892 array_type = build_java_array_type (type, -1);
895 if (flag_bounds_check)
898 * (unsigned jint) INDEX >= (unsigned jint) LEN
899 * && throw ArrayIndexOutOfBoundsException.
900 * Note this is equivalent to and more efficient than:
901 * INDEX < 0 || INDEX >= LEN && throw ... */
903 tree len = convert (unsigned_int_type_node,
904 build_java_array_length_access (array));
905 test = fold (build2 (GE_EXPR, boolean_type_node,
906 convert (unsigned_int_type_node, index),
908 if (! integer_zerop (test))
910 throw = build2 (TRUTH_ANDIF_EXPR, int_type_node, test,
911 build_java_throw_out_of_bounds_exception (index));
912 /* allows expansion within COMPOUND */
913 TREE_SIDE_EFFECTS( throw ) = 1;
917 /* If checking bounds, wrap the index expr with a COMPOUND_EXPR in order
918 to have the bounds check evaluated first. */
919 if (throw != NULL_TREE)
920 index = build2 (COMPOUND_EXPR, int_type_node, throw, index);
922 data_field = lookup_field (&array_type, get_identifier ("data"));
924 ref = build3 (COMPONENT_REF, TREE_TYPE (data_field),
925 build_java_indirect_ref (array_type, array,
926 flag_check_references),
927 data_field, NULL_TREE);
929 node = build4 (ARRAY_REF, type, ref, index, NULL_TREE, NULL_TREE);
933 /* Generate code to throw an ArrayStoreException if OBJECT is not assignable
934 (at runtime) to an element of ARRAY. A NOP_EXPR is returned if it can
935 determine that no check is required. */
938 build_java_arraystore_check (tree array, tree object)
940 tree check, element_type, source;
941 tree array_type_p = TREE_TYPE (array);
942 tree object_type = TYPE_NAME (TREE_TYPE (TREE_TYPE (object)));
944 if (! flag_verify_invocations)
946 /* With the new verifier, we don't track precise types. FIXME:
947 performance regression here. */
948 element_type = TYPE_NAME (object_type_node);
952 if (! is_array_type_p (array_type_p))
955 /* Get the TYPE_DECL for ARRAY's element type. */
957 = TYPE_NAME (TREE_TYPE (TREE_TYPE (TREE_TYPE (array_type_p))));
960 if (TREE_CODE (element_type) != TYPE_DECL
961 || TREE_CODE (object_type) != TYPE_DECL)
964 if (!flag_store_check)
965 return build1 (NOP_EXPR, array_type_p, array);
967 /* No check is needed if the element type is final. Also check that
968 element_type matches object_type, since in the bytecode
969 compilation case element_type may be the actual element type of
970 the array rather than its declared type. However, if we're doing
971 indirect dispatch, we can't do the `final' optimization. */
972 if (element_type == object_type
973 && ! flag_indirect_dispatch
974 && CLASS_FINAL (element_type))
975 return build1 (NOP_EXPR, array_type_p, array);
977 /* OBJECT might be wrapped by a SAVE_EXPR. */
978 if (TREE_CODE (object) == SAVE_EXPR)
979 source = TREE_OPERAND (object, 0);
983 /* Avoid the check if OBJECT was just loaded from the same array. */
984 if (TREE_CODE (source) == ARRAY_REF)
987 source = TREE_OPERAND (source, 0); /* COMPONENT_REF. */
988 source = TREE_OPERAND (source, 0); /* INDIRECT_REF. */
989 source = TREE_OPERAND (source, 0); /* Source array's DECL or SAVE_EXPR. */
990 if (TREE_CODE (source) == SAVE_EXPR)
991 source = TREE_OPERAND (source, 0);
994 if (TREE_CODE (target) == SAVE_EXPR)
995 target = TREE_OPERAND (target, 0);
997 if (source == target)
998 return build1 (NOP_EXPR, array_type_p, array);
1001 /* Build an invocation of _Jv_CheckArrayStore */
1002 check = build3 (CALL_EXPR, void_type_node,
1003 build_address_of (soft_checkarraystore_node),
1004 tree_cons (NULL_TREE, array,
1005 build_tree_list (NULL_TREE, object)),
1007 TREE_SIDE_EFFECTS (check) = 1;
1012 /* Makes sure that INDEXED_TYPE is appropriate. If not, make it from
1013 ARRAY_NODE. This function is used to retrieve something less vague than
1014 a pointer type when indexing the first dimension of something like [[<t>.
1015 May return a corrected type, if necessary, otherwise INDEXED_TYPE is
1016 return unchanged. */
1019 build_java_check_indexed_type (tree array_node, tree indexed_type)
1023 /* We used to check to see if ARRAY_NODE really had array type.
1024 However, with the new verifier, this is not necessary, as we know
1025 that the object will be an array of the appropriate type. */
1027 if (flag_new_verifier)
1028 return indexed_type;
1030 if (!is_array_type_p (TREE_TYPE (array_node)))
1033 elt_type = (TYPE_ARRAY_ELEMENT (TREE_TYPE (TREE_TYPE (array_node))));
1035 if (indexed_type == ptr_type_node)
1036 return promote_type (elt_type);
1038 /* BYTE/BOOLEAN store and load are used for both type */
1039 if (indexed_type == byte_type_node && elt_type == boolean_type_node)
1040 return boolean_type_node;
1042 if (indexed_type != elt_type )
1045 return indexed_type;
1048 /* newarray triggers a call to _Jv_NewPrimArray. This function should be
1049 called with an integer code (the type of array to create), and the length
1050 of the array to create. */
1053 build_newarray (int atype_value, tree length)
1057 tree prim_type = decode_newarray_type (atype_value);
1059 = build_java_array_type (prim_type,
1060 host_integerp (length, 0) == INTEGER_CST
1061 ? tree_low_cst (length, 0) : -1);
1063 /* If compiling to native, pass a reference to the primitive type class
1064 and save the runtime some work. However, the bytecode generator
1065 expects to find the type_code int here. */
1066 if (flag_emit_class_files)
1067 type_arg = build_int_cst (NULL_TREE, atype_value);
1069 type_arg = build_class_ref (prim_type);
1071 return build3 (CALL_EXPR, promote_type (type),
1072 build_address_of (soft_newarray_node),
1073 tree_cons (NULL_TREE,
1075 build_tree_list (NULL_TREE, length)),
1079 /* Generates anewarray from a given CLASS_TYPE. Gets from the stack the size
1080 of the dimension. */
1083 build_anewarray (tree class_type, tree length)
1086 = build_java_array_type (class_type,
1087 host_integerp (length, 0)
1088 ? tree_low_cst (length, 0) : -1);
1090 return build3 (CALL_EXPR, promote_type (type),
1091 build_address_of (soft_anewarray_node),
1092 tree_cons (NULL_TREE, length,
1093 tree_cons (NULL_TREE, build_class_ref (class_type),
1094 build_tree_list (NULL_TREE,
1095 null_pointer_node))),
1099 /* Return a node the evaluates 'new TYPE[LENGTH]'. */
1102 build_new_array (tree type, tree length)
1104 if (JPRIMITIVE_TYPE_P (type))
1105 return build_newarray (encode_newarray_type (type), length);
1107 return build_anewarray (TREE_TYPE (type), length);
1110 /* Generates a call to _Jv_NewMultiArray. multianewarray expects a
1111 class pointer, a number of dimensions and the matching number of
1112 dimensions. The argument list is NULL terminated. */
1115 expand_java_multianewarray (tree class_type, int ndim)
1118 tree args = build_tree_list( NULL_TREE, null_pointer_node );
1120 for( i = 0; i < ndim; i++ )
1121 args = tree_cons (NULL_TREE, pop_value (int_type_node), args);
1123 push_value (build3 (CALL_EXPR,
1124 promote_type (class_type),
1125 build_address_of (soft_multianewarray_node),
1126 tree_cons (NULL_TREE, build_class_ref (class_type),
1127 tree_cons (NULL_TREE,
1128 build_int_cst (NULL_TREE, ndim),
1133 /* ARRAY[INDEX] <- RHS. build_java_check_indexed_type makes sure that
1134 ARRAY is an array type. May expand some bound checking and NULL
1135 pointer checking. RHS_TYPE_NODE we are going to store. In the case
1136 of the CHAR/BYTE/BOOLEAN SHORT, the type popped of the stack is an
1137 INT. In those cases, we make the conversion.
1139 if ARRAy is a reference type, the assignment is checked at run-time
1140 to make sure that the RHS can be assigned to the array element
1141 type. It is not necessary to generate this code if ARRAY is final. */
1144 expand_java_arraystore (tree rhs_type_node)
1146 tree rhs_node = pop_value ((INTEGRAL_TYPE_P (rhs_type_node)
1147 && TYPE_PRECISION (rhs_type_node) <= 32) ?
1148 int_type_node : rhs_type_node);
1149 tree index = pop_value (int_type_node);
1150 tree array_type, array;
1152 if (flag_new_verifier)
1154 /* If we're processing an `aaload' we might as well just pick
1156 if (TREE_CODE (rhs_type_node) == POINTER_TYPE)
1158 array_type = build_java_array_type (object_ptr_type_node, -1);
1159 rhs_type_node = object_ptr_type_node;
1162 array_type = build_java_array_type (rhs_type_node, -1);
1165 array_type = ptr_type_node;
1166 array = pop_value (array_type);
1167 if (flag_new_verifier)
1168 array = build1 (NOP_EXPR, promote_type (array_type), array);
1170 rhs_type_node = build_java_check_indexed_type (array, rhs_type_node);
1172 flush_quick_stack ();
1174 index = save_expr (index);
1175 array = save_expr (array);
1177 if (TREE_CODE (rhs_type_node) == POINTER_TYPE)
1179 tree check = build_java_arraystore_check (array, rhs_node);
1180 java_add_stmt (check);
1183 array = build_java_arrayaccess (array, rhs_type_node, index);
1184 java_add_stmt (build2 (MODIFY_EXPR, TREE_TYPE (array), array, rhs_node));
1187 /* Expand the evaluation of ARRAY[INDEX]. build_java_check_indexed_type makes
1188 sure that LHS is an array type. May expand some bound checking and NULL
1190 LHS_TYPE_NODE is the type of ARRAY[INDEX]. But in the case of CHAR/BYTE/
1191 BOOLEAN/SHORT, we push a promoted type back to the stack.
1195 expand_java_arrayload (tree lhs_type_node)
1198 tree index_node = pop_value (int_type_node);
1202 if (flag_new_verifier)
1204 /* If we're processing an `aaload' we might as well just pick
1206 if (TREE_CODE (lhs_type_node) == POINTER_TYPE)
1208 array_type = build_java_array_type (object_ptr_type_node, -1);
1209 lhs_type_node = object_ptr_type_node;
1212 array_type = build_java_array_type (lhs_type_node, -1);
1215 array_type = ptr_type_node;
1216 array_node = pop_value (array_type);
1217 if (flag_new_verifier)
1218 array_node = build1 (NOP_EXPR, promote_type (array_type), array_node);
1220 index_node = save_expr (index_node);
1221 array_node = save_expr (array_node);
1223 lhs_type_node = build_java_check_indexed_type (array_node,
1225 load_node = build_java_arrayaccess (array_node,
1228 if (INTEGRAL_TYPE_P (lhs_type_node) && TYPE_PRECISION (lhs_type_node) <= 32)
1229 load_node = fold (build1 (NOP_EXPR, int_type_node, load_node));
1230 push_value (load_node);
1233 /* Expands .length. Makes sure that we deal with and array and may expand
1234 a NULL check on the array object. */
1237 expand_java_array_length (void)
1239 tree array = pop_value (ptr_type_node);
1240 tree length = build_java_array_length_access (array);
1242 push_value (length);
1245 /* Emit code for the call to _Jv_Monitor{Enter,Exit}. CALL can be
1246 either soft_monitorenter_node or soft_monitorexit_node. */
1249 build_java_monitor (tree call, tree object)
1251 return build3 (CALL_EXPR,
1253 build_address_of (call),
1254 build_tree_list (NULL_TREE, object),
1258 /* Emit code for one of the PUSHC instructions. */
1261 expand_java_pushc (int ival, tree type)
1264 if (type == ptr_type_node && ival == 0)
1265 value = null_pointer_node;
1266 else if (type == int_type_node || type == long_type_node)
1267 value = build_int_cst (type, ival);
1268 else if (type == float_type_node || type == double_type_node)
1271 REAL_VALUE_FROM_INT (x, ival, 0, TYPE_MODE (type));
1272 value = build_real (type, x);
1281 expand_java_return (tree type)
1283 if (type == void_type_node)
1284 java_add_stmt (build1 (RETURN_EXPR, void_type_node, NULL));
1287 tree retval = pop_value (type);
1288 tree res = DECL_RESULT (current_function_decl);
1289 retval = build2 (MODIFY_EXPR, TREE_TYPE (res), res, retval);
1291 /* Handle the situation where the native integer type is smaller
1292 than the JVM integer. It can happen for many cross compilers.
1293 The whole if expression just goes away if INT_TYPE_SIZE < 32
1295 if (INT_TYPE_SIZE < 32
1296 && (GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (res)))
1297 < GET_MODE_SIZE (TYPE_MODE (type))))
1298 retval = build1(NOP_EXPR, TREE_TYPE(res), retval);
1300 TREE_SIDE_EFFECTS (retval) = 1;
1301 java_add_stmt (build1 (RETURN_EXPR, TREE_TYPE (retval), retval));
1306 expand_load_internal (int index, tree type, int pc)
1309 tree var = find_local_variable (index, type, pc);
1311 /* Now VAR is the VAR_DECL (or PARM_DECL) that we are going to push
1312 on the stack. If there is an assignment to this VAR_DECL between
1313 the stack push and the use, then the wrong code could be
1314 generated. To avoid this we create a new local and copy our
1315 value into it. Then we push this new local on the stack.
1316 Hopefully this all gets optimized out. */
1317 copy = build_decl (VAR_DECL, NULL_TREE, type);
1318 if (INTEGRAL_TYPE_P (type)
1319 && TREE_TYPE (copy) != TREE_TYPE (var))
1320 var = convert (type, var);
1321 java_add_local_var (copy);
1322 java_add_stmt (build2 (MODIFY_EXPR, TREE_TYPE (var), copy, var));
1328 build_address_of (tree value)
1330 return build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (value)), value);
1334 class_has_finalize_method (tree type)
1336 tree super = CLASSTYPE_SUPER (type);
1338 if (super == NULL_TREE)
1339 return false; /* Every class with a real finalizer inherits */
1340 /* from java.lang.Object. */
1342 return HAS_FINALIZER_P (type) || class_has_finalize_method (super);
1346 java_create_object (tree type)
1348 tree alloc_node = (class_has_finalize_method (type)
1350 : alloc_no_finalizer_node);
1352 return build (CALL_EXPR, promote_type (type),
1353 build_address_of (alloc_node),
1354 build_tree_list (NULL_TREE, build_class_ref (type)),
1359 expand_java_NEW (tree type)
1363 alloc_node = (class_has_finalize_method (type) ? alloc_object_node
1364 : alloc_no_finalizer_node);
1365 if (! CLASS_LOADED_P (type))
1366 load_class (type, 1);
1367 safe_layout_class (type);
1368 push_value (build3 (CALL_EXPR, promote_type (type),
1369 build_address_of (alloc_node),
1370 build_tree_list (NULL_TREE, build_class_ref (type)),
1374 /* This returns an expression which will extract the class of an
1378 build_get_class (tree value)
1380 tree class_field = lookup_field (&dtable_type, get_identifier ("class"));
1381 tree vtable_field = lookup_field (&object_type_node,
1382 get_identifier ("vtable"));
1383 tree tmp = build3 (COMPONENT_REF, dtable_ptr_type,
1384 build_java_indirect_ref (object_type_node, value,
1385 flag_check_references),
1386 vtable_field, NULL_TREE);
1387 return build3 (COMPONENT_REF, class_ptr_type,
1388 build1 (INDIRECT_REF, dtable_type, tmp),
1389 class_field, NULL_TREE);
1392 /* This builds the tree representation of the `instanceof' operator.
1393 It tries various tricks to optimize this in cases where types are
1397 build_instanceof (tree value, tree type)
1400 tree itype = TREE_TYPE (TREE_TYPE (soft_instanceof_node));
1401 tree valtype = TREE_TYPE (TREE_TYPE (value));
1402 tree valclass = TYPE_NAME (valtype);
1405 /* When compiling from bytecode, we need to ensure that TYPE has
1407 if (CLASS_P (type) && ! CLASS_LOADED_P (type))
1409 load_class (type, 1);
1410 safe_layout_class (type);
1411 if (! TYPE_SIZE (type) || TREE_CODE (TYPE_SIZE (type)) == ERROR_MARK)
1412 return error_mark_node;
1414 klass = TYPE_NAME (type);
1416 if (type == object_type_node || inherits_from_p (valtype, type))
1418 /* Anything except `null' is an instance of Object. Likewise,
1419 if the object is known to be an instance of the class, then
1420 we only need to check for `null'. */
1421 expr = build2 (NE_EXPR, itype, value, null_pointer_node);
1423 else if (flag_verify_invocations
1424 && ! TYPE_ARRAY_P (type)
1425 && ! TYPE_ARRAY_P (valtype)
1426 && DECL_P (klass) && DECL_P (valclass)
1427 && ! CLASS_INTERFACE (valclass)
1428 && ! CLASS_INTERFACE (klass)
1429 && ! inherits_from_p (type, valtype)
1430 && (CLASS_FINAL (klass)
1431 || ! inherits_from_p (valtype, type)))
1433 /* The classes are from different branches of the derivation
1434 tree, so we immediately know the answer. */
1435 expr = boolean_false_node;
1437 else if (DECL_P (klass) && CLASS_FINAL (klass))
1439 tree save = save_expr (value);
1440 expr = build3 (COND_EXPR, itype,
1441 build2 (NE_EXPR, boolean_type_node,
1442 save, null_pointer_node),
1443 build2 (EQ_EXPR, itype,
1444 build_get_class (save),
1445 build_class_ref (type)),
1446 boolean_false_node);
1450 expr = build3 (CALL_EXPR, itype,
1451 build_address_of (soft_instanceof_node),
1452 tree_cons (NULL_TREE, value,
1453 build_tree_list (NULL_TREE,
1454 build_class_ref (type))),
1457 TREE_SIDE_EFFECTS (expr) = TREE_SIDE_EFFECTS (value);
1462 expand_java_INSTANCEOF (tree type)
1464 tree value = pop_value (object_ptr_type_node);
1465 value = build_instanceof (value, type);
1470 expand_java_CHECKCAST (tree type)
1472 tree value = pop_value (ptr_type_node);
1473 value = build3 (CALL_EXPR, promote_type (type),
1474 build_address_of (soft_checkcast_node),
1475 tree_cons (NULL_TREE, build_class_ref (type),
1476 build_tree_list (NULL_TREE, value)),
1482 expand_iinc (unsigned int local_var_index, int ival, int pc)
1484 tree local_var, res;
1485 tree constant_value;
1487 flush_quick_stack ();
1488 local_var = find_local_variable (local_var_index, int_type_node, pc);
1489 constant_value = build_int_cst (NULL_TREE, ival);
1490 res = fold (build2 (PLUS_EXPR, int_type_node, local_var, constant_value));
1491 java_add_stmt (build2 (MODIFY_EXPR, TREE_TYPE (local_var), local_var, res));
1492 update_aliases (local_var, local_var_index, pc);
1497 build_java_soft_divmod (enum tree_code op, tree type, tree op1, tree op2)
1500 tree arg1 = convert (type, op1);
1501 tree arg2 = convert (type, op2);
1503 if (type == int_type_node)
1507 case TRUNC_DIV_EXPR:
1508 call = soft_idiv_node;
1510 case TRUNC_MOD_EXPR:
1511 call = soft_irem_node;
1517 else if (type == long_type_node)
1521 case TRUNC_DIV_EXPR:
1522 call = soft_ldiv_node;
1524 case TRUNC_MOD_EXPR:
1525 call = soft_lrem_node;
1535 call = build3 (CALL_EXPR, type,
1536 build_address_of (call),
1537 tree_cons (NULL_TREE, arg1,
1538 build_tree_list (NULL_TREE, arg2)),
1545 build_java_binop (enum tree_code op, tree type, tree arg1, tree arg2)
1552 tree u_type = java_unsigned_type (type);
1553 arg1 = convert (u_type, arg1);
1554 arg1 = build_java_binop (RSHIFT_EXPR, u_type, arg1, arg2);
1555 return convert (type, arg1);
1559 mask = build_int_cst (NULL_TREE,
1560 TYPE_PRECISION (TREE_TYPE (arg1)) - 1);
1561 arg2 = fold (build2 (BIT_AND_EXPR, int_type_node, arg2, mask));
1564 case COMPARE_L_EXPR: /* arg1 > arg2 ? 1 : arg1 == arg2 ? 0 : -1 */
1565 case COMPARE_G_EXPR: /* arg1 < arg2 ? -1 : arg1 == arg2 ? 0 : 1 */
1566 arg1 = save_expr (arg1); arg2 = save_expr (arg2);
1568 tree ifexp1 = fold (build2 (op == COMPARE_L_EXPR ? GT_EXPR : LT_EXPR,
1569 boolean_type_node, arg1, arg2));
1570 tree ifexp2 = fold (build2 (EQ_EXPR, boolean_type_node, arg1, arg2));
1571 tree second_compare = fold (build3 (COND_EXPR, int_type_node,
1572 ifexp2, integer_zero_node,
1573 op == COMPARE_L_EXPR
1574 ? integer_minus_one_node
1575 : integer_one_node));
1576 return fold (build3 (COND_EXPR, int_type_node, ifexp1,
1577 op == COMPARE_L_EXPR ? integer_one_node
1578 : integer_minus_one_node,
1582 arg1 = save_expr (arg1); arg2 = save_expr (arg2);
1584 tree ifexp1 = fold (build2 (LT_EXPR, boolean_type_node, arg1, arg2));
1585 tree ifexp2 = fold (build2 (GT_EXPR, boolean_type_node, arg1, arg2));
1586 tree second_compare = fold (build3 (COND_EXPR, int_type_node,
1587 ifexp2, integer_one_node,
1588 integer_zero_node));
1589 return fold (build3 (COND_EXPR, int_type_node,
1590 ifexp1, integer_minus_one_node, second_compare));
1592 case TRUNC_DIV_EXPR:
1593 case TRUNC_MOD_EXPR:
1594 if (TREE_CODE (type) == REAL_TYPE
1595 && op == TRUNC_MOD_EXPR)
1598 if (type != double_type_node)
1600 arg1 = convert (double_type_node, arg1);
1601 arg2 = convert (double_type_node, arg2);
1603 call = build3 (CALL_EXPR, double_type_node,
1604 build_address_of (soft_fmod_node),
1605 tree_cons (NULL_TREE, arg1,
1606 build_tree_list (NULL_TREE, arg2)),
1608 if (type != double_type_node)
1609 call = convert (type, call);
1613 if (TREE_CODE (type) == INTEGER_TYPE
1614 && flag_use_divide_subroutine
1615 && ! flag_syntax_only)
1616 return build_java_soft_divmod (op, type, arg1, arg2);
1621 return fold (build2 (op, type, arg1, arg2));
1625 expand_java_binop (tree type, enum tree_code op)
1635 rtype = int_type_node;
1636 rarg = pop_value (rtype);
1639 rarg = pop_value (rtype);
1641 larg = pop_value (ltype);
1642 push_value (build_java_binop (op, type, larg, rarg));
1645 /* Lookup the field named NAME in *TYPEP or its super classes.
1646 If not found, return NULL_TREE.
1647 (If the *TYPEP is not found, or if the field reference is
1648 ambiguous, return error_mark_node.)
1649 If found, return the FIELD_DECL, and set *TYPEP to the
1650 class containing the field. */
1653 lookup_field (tree *typep, tree name)
1655 if (CLASS_P (*typep) && !CLASS_LOADED_P (*typep))
1657 load_class (*typep, 1);
1658 safe_layout_class (*typep);
1659 if (!TYPE_SIZE (*typep) || TREE_CODE (TYPE_SIZE (*typep)) == ERROR_MARK)
1660 return error_mark_node;
1664 tree field, binfo, base_binfo;
1668 for (field = TYPE_FIELDS (*typep); field; field = TREE_CHAIN (field))
1669 if (DECL_NAME (field) == name)
1672 /* Process implemented interfaces. */
1673 save_field = NULL_TREE;
1674 for (binfo = TYPE_BINFO (*typep), i = 0;
1675 BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
1677 tree t = BINFO_TYPE (base_binfo);
1678 if ((field = lookup_field (&t, name)))
1680 if (save_field == field)
1682 if (save_field == NULL_TREE)
1686 tree i1 = DECL_CONTEXT (save_field);
1687 tree i2 = DECL_CONTEXT (field);
1688 error ("reference %qs is ambiguous: appears in interface %qs and interface %qs",
1689 IDENTIFIER_POINTER (name),
1690 IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (i1))),
1691 IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (i2))));
1692 return error_mark_node;
1697 if (save_field != NULL_TREE)
1700 *typep = CLASSTYPE_SUPER (*typep);
1705 /* Look up the field named NAME in object SELF_VALUE,
1706 which has class SELF_CLASS (a non-handle RECORD_TYPE).
1707 SELF_VALUE is NULL_TREE if looking for a static field. */
1710 build_field_ref (tree self_value, tree self_class, tree name)
1712 tree base_class = self_class;
1713 tree field_decl = lookup_field (&base_class, name);
1714 if (field_decl == NULL_TREE)
1716 error ("field %qs not found", IDENTIFIER_POINTER (name));
1717 return error_mark_node;
1719 if (self_value == NULL_TREE)
1721 return build_static_field_ref (field_decl);
1725 int check = (flag_check_references
1726 && ! (DECL_P (self_value)
1727 && DECL_NAME (self_value) == this_identifier_node));
1729 tree base_type = promote_type (base_class);
1730 if (base_type != TREE_TYPE (self_value))
1731 self_value = fold (build1 (NOP_EXPR, base_type, self_value));
1732 if (! flag_syntax_only
1733 && (flag_indirect_dispatch
1734 /* DECL_FIELD_OFFSET == 0 if we have no reference for
1735 the field, perhaps because we couldn't find the class
1736 in which the field is defined.
1737 FIXME: We should investigate this. */
1738 || DECL_FIELD_OFFSET (field_decl) == 0))
1741 = build_int_cst (NULL_TREE, get_symbol_table_index
1742 (field_decl, &TYPE_OTABLE_METHODS (output_class)));
1744 = build4 (ARRAY_REF, integer_type_node,
1745 TYPE_OTABLE_DECL (output_class), otable_index,
1746 NULL_TREE, NULL_TREE);
1749 field_offset = fold (convert (sizetype, field_offset));
1751 = fold (build2 (PLUS_EXPR,
1752 build_pointer_type (TREE_TYPE (field_decl)),
1753 self_value, field_offset));
1754 return fold (build1 (INDIRECT_REF, TREE_TYPE (field_decl), address));
1757 self_value = build_java_indirect_ref (TREE_TYPE (TREE_TYPE (self_value)),
1759 return fold (build3 (COMPONENT_REF, TREE_TYPE (field_decl),
1760 self_value, field_decl, NULL_TREE));
1765 lookup_label (int pc)
1769 ASM_GENERATE_INTERNAL_LABEL(buf, "LJpc=", pc);
1770 name = get_identifier (buf);
1771 if (IDENTIFIER_LOCAL_VALUE (name))
1772 return IDENTIFIER_LOCAL_VALUE (name);
1775 /* The type of the address of a label is return_address_type_node. */
1776 tree decl = create_label_decl (name);
1777 LABEL_PC (decl) = pc;
1778 return pushdecl (decl);
1782 /* Generate a unique name for the purpose of loops and switches
1783 labels, and try-catch-finally blocks label or temporary variables. */
1786 generate_name (void)
1788 static int l_number = 0;
1790 ASM_GENERATE_INTERNAL_LABEL(buff, "LJv", l_number);
1792 return get_identifier (buff);
1796 create_label_decl (tree name)
1799 decl = build_decl (LABEL_DECL, name,
1800 TREE_TYPE (return_address_type_node));
1801 DECL_CONTEXT (decl) = current_function_decl;
1802 DECL_IGNORED_P (decl) = 1;
1803 DECL_ARTIFICIAL (decl) = 1;
1807 /* This maps a bytecode offset (PC) to various flags. */
1808 char *instruction_bits;
1811 note_label (int current_pc ATTRIBUTE_UNUSED, int target_pc)
1813 lookup_label (target_pc);
1814 instruction_bits [target_pc] |= BCODE_JUMP_TARGET;
1817 /* Emit code to jump to TARGET_PC if VALUE1 CONDITION VALUE2,
1818 where CONDITION is one of one the compare operators. */
1821 expand_compare (enum tree_code condition, tree value1, tree value2,
1824 tree target = lookup_label (target_pc);
1825 tree cond = fold (build2 (condition, boolean_type_node, value1, value2));
1827 (build3 (COND_EXPR, void_type_node, java_truthvalue_conversion (cond),
1828 build1 (GOTO_EXPR, void_type_node, target),
1829 build_java_empty_stmt ()));
1832 /* Emit code for a TEST-type opcode. */
1835 expand_test (enum tree_code condition, tree type, int target_pc)
1837 tree value1, value2;
1838 flush_quick_stack ();
1839 value1 = pop_value (type);
1840 value2 = (type == ptr_type_node) ? null_pointer_node : integer_zero_node;
1841 expand_compare (condition, value1, value2, target_pc);
1844 /* Emit code for a COND-type opcode. */
1847 expand_cond (enum tree_code condition, tree type, int target_pc)
1849 tree value1, value2;
1850 flush_quick_stack ();
1851 /* note: pop values in opposite order */
1852 value2 = pop_value (type);
1853 value1 = pop_value (type);
1854 /* Maybe should check value1 and value2 for type compatibility ??? */
1855 expand_compare (condition, value1, value2, target_pc);
1859 expand_java_goto (int target_pc)
1861 tree target_label = lookup_label (target_pc);
1862 flush_quick_stack ();
1863 java_add_stmt (build1 (GOTO_EXPR, void_type_node, target_label));
1867 expand_java_switch (tree selector, int default_pc)
1869 tree switch_expr, x;
1871 flush_quick_stack ();
1872 switch_expr = build3 (SWITCH_EXPR, TREE_TYPE (selector), selector,
1873 NULL_TREE, NULL_TREE);
1874 java_add_stmt (switch_expr);
1876 x = build3 (CASE_LABEL_EXPR, void_type_node, NULL_TREE, NULL_TREE,
1877 create_artificial_label ());
1878 append_to_statement_list (x, &SWITCH_BODY (switch_expr));
1880 x = build1 (GOTO_EXPR, void_type_node, lookup_label (default_pc));
1881 append_to_statement_list (x, &SWITCH_BODY (switch_expr));
1887 expand_java_add_case (tree switch_expr, int match, int target_pc)
1891 value = build_int_cst (TREE_TYPE (switch_expr), match);
1893 x = build3 (CASE_LABEL_EXPR, void_type_node, value, NULL_TREE,
1894 create_artificial_label ());
1895 append_to_statement_list (x, &SWITCH_BODY (switch_expr));
1897 x = build1 (GOTO_EXPR, void_type_node, lookup_label (target_pc));
1898 append_to_statement_list (x, &SWITCH_BODY (switch_expr));
1902 pop_arguments (tree arg_types)
1904 if (arg_types == end_params_node)
1906 if (TREE_CODE (arg_types) == TREE_LIST)
1908 tree tail = pop_arguments (TREE_CHAIN (arg_types));
1909 tree type = TREE_VALUE (arg_types);
1910 tree arg = pop_value (type);
1912 /* With the new verifier we simply cast each argument to its
1913 proper type. This is needed since we lose type information
1914 coming out of the verifier. We also have to do this with the
1915 old verifier when we pop an integer type that must be
1916 promoted for the function call. */
1917 if (flag_new_verifier && TREE_CODE (type) == POINTER_TYPE)
1918 arg = build1 (NOP_EXPR, type, arg);
1919 else if (targetm.calls.promote_prototypes (type)
1920 && TYPE_PRECISION (type) < TYPE_PRECISION (integer_type_node)
1921 && INTEGRAL_TYPE_P (type))
1922 arg = convert (integer_type_node, arg);
1923 return tree_cons (NULL_TREE, arg, tail);
1928 /* Attach to PTR (a block) the declaration found in ENTRY. */
1931 attach_init_test_initialization_flags (void **entry, void *ptr)
1933 tree block = (tree)ptr;
1934 struct treetreehash_entry *ite = (struct treetreehash_entry *) *entry;
1936 if (block != error_mark_node)
1938 if (TREE_CODE (block) == BIND_EXPR)
1940 tree body = BIND_EXPR_BODY (block);
1941 TREE_CHAIN (ite->value) = BIND_EXPR_VARS (block);
1942 BIND_EXPR_VARS (block) = ite->value;
1943 body = build2 (COMPOUND_EXPR, void_type_node,
1944 build1 (DECL_EXPR, void_type_node, ite->value), body);
1945 BIND_EXPR_BODY (block) = body;
1949 tree body = BLOCK_SUBBLOCKS (block);
1950 TREE_CHAIN (ite->value) = BLOCK_EXPR_DECLS (block);
1951 BLOCK_EXPR_DECLS (block) = ite->value;
1952 body = build2 (COMPOUND_EXPR, void_type_node,
1953 build1 (DECL_EXPR, void_type_node, ite->value), body);
1954 BLOCK_SUBBLOCKS (block) = body;
1961 /* Build an expression to initialize the class CLAS.
1962 if EXPR is non-NULL, returns an expression to first call the initializer
1963 (if it is needed) and then calls EXPR. */
1966 build_class_init (tree clas, tree expr)
1970 /* An optimization: if CLAS is a superclass of the class we're
1971 compiling, we don't need to initialize it. However, if CLAS is
1972 an interface, it won't necessarily be initialized, even if we
1974 if ((! CLASS_INTERFACE (TYPE_NAME (clas))
1975 && inherits_from_p (current_class, clas))
1976 || current_class == clas)
1979 if (always_initialize_class_p)
1981 init = build3 (CALL_EXPR, void_type_node,
1982 build_address_of (soft_initclass_node),
1983 build_tree_list (NULL_TREE, build_class_ref (clas)),
1985 TREE_SIDE_EFFECTS (init) = 1;
1989 tree *init_test_decl;
1991 init_test_decl = java_treetreehash_new
1992 (DECL_FUNCTION_INIT_TEST_TABLE (current_function_decl), clas);
1994 if (*init_test_decl == NULL)
1996 /* Build a declaration and mark it as a flag used to track
1997 static class initializations. */
1998 decl = build_decl (VAR_DECL, NULL_TREE,
2000 MAYBE_CREATE_VAR_LANG_DECL_SPECIFIC (decl);
2001 LOCAL_CLASS_INITIALIZATION_FLAG (decl) = 1;
2002 DECL_CONTEXT (decl) = current_function_decl;
2003 DECL_FUNCTION_INIT_TEST_CLASS (decl) = clas;
2004 /* Tell the check-init code to ignore this decl when not
2005 optimizing class initialization. */
2006 if (!STATIC_CLASS_INIT_OPT_P ())
2007 DECL_BIT_INDEX (decl) = -1;
2008 DECL_INITIAL (decl) = boolean_false_node;
2009 /* Don't emit any symbolic debugging info for this decl. */
2010 DECL_IGNORED_P (decl) = 1;
2011 *init_test_decl = decl;
2014 init = build3 (CALL_EXPR, void_type_node,
2015 build_address_of (soft_initclass_node),
2016 build_tree_list (NULL_TREE, build_class_ref (clas)),
2018 TREE_SIDE_EFFECTS (init) = 1;
2019 init = build3 (COND_EXPR, void_type_node,
2020 build2 (EQ_EXPR, boolean_type_node,
2021 *init_test_decl, boolean_false_node),
2022 init, integer_zero_node);
2023 TREE_SIDE_EFFECTS (init) = 1;
2024 init = build2 (COMPOUND_EXPR, TREE_TYPE (expr), init,
2025 build2 (MODIFY_EXPR, boolean_type_node,
2026 *init_test_decl, boolean_true_node));
2027 TREE_SIDE_EFFECTS (init) = 1;
2030 if (expr != NULL_TREE)
2032 expr = build2 (COMPOUND_EXPR, TREE_TYPE (expr), init, expr);
2033 TREE_SIDE_EFFECTS (expr) = 1;
2040 build_known_method_ref (tree method, tree method_type ATTRIBUTE_UNUSED,
2041 tree self_type, tree method_signature ATTRIBUTE_UNUSED,
2042 tree arg_list ATTRIBUTE_UNUSED)
2045 if (is_compiled_class (self_type))
2047 /* With indirect dispatch we have to use indirect calls for all
2048 publicly visible methods or gcc will use PLT indirections
2049 to reach them. We also have to use indirect dispatch for all
2050 external methods. */
2051 if (! flag_indirect_dispatch
2052 || (! DECL_EXTERNAL (method) && ! TREE_PUBLIC (method)))
2054 make_decl_rtl (method);
2055 func = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (method)),
2061 = build_int_cst (NULL_TREE, get_symbol_table_index
2062 (method, &TYPE_ATABLE_METHODS (output_class)));
2064 = build4 (ARRAY_REF,
2065 TREE_TYPE (TREE_TYPE (TYPE_ATABLE_DECL (output_class))),
2066 TYPE_ATABLE_DECL (output_class), table_index,
2067 NULL_TREE, NULL_TREE);
2069 func = convert (method_ptr_type_node, func);
2073 /* We don't know whether the method has been (statically) compiled.
2074 Compile this code to get a reference to the method's code:
2076 SELF_TYPE->methods[METHOD_INDEX].ncode
2080 int method_index = 0;
2083 /* The method might actually be declared in some superclass, so
2084 we have to use its class context, not the caller's notion of
2085 where the method is. */
2086 self_type = DECL_CONTEXT (method);
2087 ref = build_class_ref (self_type);
2088 ref = build1 (INDIRECT_REF, class_type_node, ref);
2089 if (ncode_ident == NULL_TREE)
2090 ncode_ident = get_identifier ("ncode");
2091 if (methods_ident == NULL_TREE)
2092 methods_ident = get_identifier ("methods");
2093 ref = build3 (COMPONENT_REF, method_ptr_type_node, ref,
2094 lookup_field (&class_type_node, methods_ident),
2096 for (meth = TYPE_METHODS (self_type);
2097 ; meth = TREE_CHAIN (meth))
2101 if (meth == NULL_TREE)
2102 fatal_error ("method '%s' not found in class",
2103 IDENTIFIER_POINTER (DECL_NAME (method)));
2106 method_index *= int_size_in_bytes (method_type_node);
2107 ref = fold (build2 (PLUS_EXPR, method_ptr_type_node,
2108 ref, build_int_cst (NULL_TREE, method_index)));
2109 ref = build1 (INDIRECT_REF, method_type_node, ref);
2110 func = build3 (COMPONENT_REF, nativecode_ptr_type_node,
2111 ref, lookup_field (&method_type_node, ncode_ident),
2118 invoke_build_dtable (int is_invoke_interface, tree arg_list)
2120 tree dtable, objectref;
2122 TREE_VALUE (arg_list) = save_expr (TREE_VALUE (arg_list));
2124 /* If we're dealing with interfaces and if the objectref
2125 argument is an array then get the dispatch table of the class
2126 Object rather than the one from the objectref. */
2127 objectref = (is_invoke_interface
2128 && is_array_type_p (TREE_TYPE (TREE_VALUE (arg_list)))
2129 ? build_class_ref (object_type_node) : TREE_VALUE (arg_list));
2131 if (dtable_ident == NULL_TREE)
2132 dtable_ident = get_identifier ("vtable");
2133 dtable = build_java_indirect_ref (object_type_node, objectref,
2134 flag_check_references);
2135 dtable = build3 (COMPONENT_REF, dtable_ptr_type, dtable,
2136 lookup_field (&object_type_node, dtable_ident), NULL_TREE);
2141 /* Determine the index in SYMBOL_TABLE for a reference to the decl
2142 T. If this decl has not been seen before, it will be added to the
2143 [oa]table_methods. If it has, the existing table slot will be
2147 get_symbol_table_index (tree t, tree *symbol_table)
2152 if (*symbol_table == NULL_TREE)
2154 *symbol_table = build_tree_list (t, t);
2158 method_list = *symbol_table;
2162 tree value = TREE_VALUE (method_list);
2166 if (TREE_CHAIN (method_list) == NULL_TREE)
2169 method_list = TREE_CHAIN (method_list);
2172 TREE_CHAIN (method_list) = build_tree_list (t, t);
2177 build_invokevirtual (tree dtable, tree method)
2180 tree nativecode_ptr_ptr_type_node
2181 = build_pointer_type (nativecode_ptr_type_node);
2185 if (flag_indirect_dispatch)
2187 if (CLASS_INTERFACE (TYPE_NAME (DECL_CONTEXT (method))))
2191 = build_int_cst (NULL_TREE, get_symbol_table_index
2192 (method, &TYPE_OTABLE_METHODS (output_class)));
2193 method_index = build4 (ARRAY_REF, integer_type_node,
2194 TYPE_OTABLE_DECL (output_class),
2195 otable_index, NULL_TREE, NULL_TREE);
2199 /* We fetch the DECL_VINDEX field directly here, rather than
2200 using get_method_index(). DECL_VINDEX is the true offset
2201 from the vtable base to a method, regrdless of any extra
2202 words inserted at the start of the vtable. */
2203 method_index = DECL_VINDEX (method);
2204 method_index = size_binop (MULT_EXPR, method_index,
2205 TYPE_SIZE_UNIT (nativecode_ptr_ptr_type_node));
2206 if (TARGET_VTABLE_USES_DESCRIPTORS)
2207 method_index = size_binop (MULT_EXPR, method_index,
2208 size_int (TARGET_VTABLE_USES_DESCRIPTORS));
2211 func = fold (build2 (PLUS_EXPR, nativecode_ptr_ptr_type_node, dtable,
2212 convert (nativecode_ptr_ptr_type_node, method_index)));
2214 if (TARGET_VTABLE_USES_DESCRIPTORS)
2215 func = build1 (NOP_EXPR, nativecode_ptr_type_node, func);
2217 func = build1 (INDIRECT_REF, nativecode_ptr_type_node, func);
2222 static GTY(()) tree class_ident;
2224 build_invokeinterface (tree dtable, tree method)
2230 /* We expand invokeinterface here. */
2232 if (class_ident == NULL_TREE)
2233 class_ident = get_identifier ("class");
2235 dtable = build_java_indirect_ref (dtable_type, dtable,
2236 flag_check_references);
2237 dtable = build3 (COMPONENT_REF, class_ptr_type, dtable,
2238 lookup_field (&dtable_type, class_ident), NULL_TREE);
2240 interface = DECL_CONTEXT (method);
2241 if (! CLASS_INTERFACE (TYPE_NAME (interface)))
2243 layout_class_methods (interface);
2245 if (flag_indirect_dispatch)
2248 = 2 * (get_symbol_table_index
2249 (method, &TYPE_ITABLE_METHODS (output_class)));
2251 = build4 (ARRAY_REF,
2252 TREE_TYPE (TREE_TYPE (TYPE_ITABLE_DECL (output_class))),
2253 TYPE_ITABLE_DECL (output_class),
2254 build_int_cst (NULL_TREE, itable_index-1),
2255 NULL_TREE, NULL_TREE);
2257 = build4 (ARRAY_REF,
2258 TREE_TYPE (TREE_TYPE (TYPE_ITABLE_DECL (output_class))),
2259 TYPE_ITABLE_DECL (output_class),
2260 build_int_cst (NULL_TREE, itable_index),
2261 NULL_TREE, NULL_TREE);
2262 interface = convert (class_ptr_type, interface);
2263 idx = convert (integer_type_node, idx);
2267 idx = build_int_cst (NULL_TREE,
2268 get_interface_method_index (method, interface));
2269 interface = build_class_ref (interface);
2272 lookup_arg = tree_cons (NULL_TREE, dtable,
2273 tree_cons (NULL_TREE, interface,
2274 build_tree_list (NULL_TREE, idx)));
2276 return build3 (CALL_EXPR, ptr_type_node,
2277 build_address_of (soft_lookupinterfacemethod_node),
2278 lookup_arg, NULL_TREE);
2281 /* Expand one of the invoke_* opcodes.
2282 OPCODE is the specific opcode.
2283 METHOD_REF_INDEX is an index into the constant pool.
2284 NARGS is the number of arguments, or -1 if not specified. */
2287 expand_invoke (int opcode, int method_ref_index, int nargs ATTRIBUTE_UNUSED)
2289 tree method_signature
2290 = COMPONENT_REF_SIGNATURE(¤t_jcf->cpool, method_ref_index);
2291 tree method_name = COMPONENT_REF_NAME (¤t_jcf->cpool,
2294 = get_class_constant (current_jcf,
2295 COMPONENT_REF_CLASS_INDEX(¤t_jcf->cpool,
2297 const char *const self_name
2298 = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (self_type)));
2299 tree call, func, method, arg_list, method_type;
2300 tree check = NULL_TREE;
2302 if (! CLASS_LOADED_P (self_type))
2304 load_class (self_type, 1);
2305 safe_layout_class (self_type);
2306 if (TREE_CODE (TYPE_SIZE (self_type)) == ERROR_MARK)
2307 fatal_error ("failed to find class '%s'", self_name);
2309 layout_class_methods (self_type);
2311 if (ID_INIT_P (method_name))
2312 method = lookup_java_constructor (self_type, method_signature);
2314 method = lookup_java_method (self_type, method_name, method_signature);
2316 /* We've found a method in an interface, but this isn't an interface
2318 if (opcode != OPCODE_invokeinterface
2320 && (CLASS_INTERFACE (TYPE_NAME (DECL_CONTEXT (method)))))
2323 /* We've found a non-interface method but we are making an
2324 interface call. This can happen if the interface overrides a
2325 method in Object. */
2326 if (! flag_verify_invocations
2327 && opcode == OPCODE_invokeinterface
2329 && ! CLASS_INTERFACE (TYPE_NAME (DECL_CONTEXT (method))))
2332 if (method == NULL_TREE)
2334 if (flag_verify_invocations || ! flag_indirect_dispatch)
2336 error ("class '%s' has no method named '%s' matching signature '%s'",
2338 IDENTIFIER_POINTER (method_name),
2339 IDENTIFIER_POINTER (method_signature));
2343 int flags = ACC_PUBLIC;
2344 if (opcode == OPCODE_invokestatic)
2345 flags |= ACC_STATIC;
2346 if (opcode == OPCODE_invokeinterface)
2348 flags |= ACC_INTERFACE | ACC_ABSTRACT;
2349 CLASS_INTERFACE (TYPE_NAME (self_type)) = 1;
2351 method = add_method (self_type, flags, method_name,
2353 DECL_ARTIFICIAL (method) = 1;
2354 METHOD_DUMMY (method) = 1;
2355 layout_class_method (self_type, NULL,
2360 /* Invoke static can't invoke static/abstract method */
2361 if (method != NULL_TREE)
2363 if (opcode == OPCODE_invokestatic)
2365 if (!METHOD_STATIC (method))
2367 error ("invokestatic on non static method");
2370 else if (METHOD_ABSTRACT (method))
2372 error ("invokestatic on abstract method");
2378 if (METHOD_STATIC (method))
2380 error ("invoke[non-static] on static method");
2386 if (method == NULL_TREE)
2388 /* If we got here, we emitted an error message above. So we
2389 just pop the arguments, push a properly-typed zero, and
2391 method_type = get_type_from_signature (method_signature);
2392 pop_arguments (TYPE_ARG_TYPES (method_type));
2393 if (opcode != OPCODE_invokestatic)
2394 pop_type (self_type);
2395 method_type = promote_type (TREE_TYPE (method_type));
2396 push_value (convert (method_type, integer_zero_node));
2400 method_type = TREE_TYPE (method);
2401 arg_list = pop_arguments (TYPE_ARG_TYPES (method_type));
2402 flush_quick_stack ();
2405 if (opcode == OPCODE_invokestatic)
2406 func = build_known_method_ref (method, method_type, self_type,
2407 method_signature, arg_list);
2408 else if (opcode == OPCODE_invokespecial
2409 || (opcode == OPCODE_invokevirtual
2410 && (METHOD_PRIVATE (method)
2411 || METHOD_FINAL (method)
2412 || CLASS_FINAL (TYPE_NAME (self_type)))))
2414 /* If the object for the method call is null, we throw an
2415 exception. We don't do this if the object is the current
2416 method's `this'. In other cases we just rely on an
2417 optimization pass to eliminate redundant checks. FIXME:
2418 Unfortunately there doesn't seem to be a way to determine
2419 what the current method is right now.
2420 We do omit the check if we're calling <init>. */
2421 /* We use a SAVE_EXPR here to make sure we only evaluate
2422 the new `self' expression once. */
2423 tree save_arg = save_expr (TREE_VALUE (arg_list));
2424 TREE_VALUE (arg_list) = save_arg;
2425 check = java_check_reference (save_arg, ! DECL_INIT_P (method));
2426 func = build_known_method_ref (method, method_type, self_type,
2427 method_signature, arg_list);
2431 tree dtable = invoke_build_dtable (opcode == OPCODE_invokeinterface,
2433 if (opcode == OPCODE_invokevirtual)
2434 func = build_invokevirtual (dtable, method);
2436 func = build_invokeinterface (dtable, method);
2439 if (TREE_CODE (func) == ADDR_EXPR)
2440 TREE_TYPE (func) = build_pointer_type (method_type);
2442 func = build1 (NOP_EXPR, build_pointer_type (method_type), func);
2444 call = build3 (CALL_EXPR, TREE_TYPE (method_type),
2445 func, arg_list, NULL_TREE);
2446 TREE_SIDE_EFFECTS (call) = 1;
2447 call = check_for_builtin (method, call);
2449 if (check != NULL_TREE)
2451 call = build2 (COMPOUND_EXPR, TREE_TYPE (call), check, call);
2452 TREE_SIDE_EFFECTS (call) = 1;
2455 if (TREE_CODE (TREE_TYPE (method_type)) == VOID_TYPE)
2456 java_add_stmt (call);
2460 flush_quick_stack ();
2464 /* Create a stub which will be put into the vtable but which will call
2468 build_jni_stub (tree method)
2470 tree jnifunc, call, args, body, lookup_arg, method_sig, arg_types;
2471 tree jni_func_type, tem;
2472 tree env_var, res_var = NULL_TREE, block;
2473 tree method_args, res_type;
2479 tree klass = DECL_CONTEXT (method);
2480 int from_class = ! CLASS_FROM_SOURCE_P (klass);
2481 klass = build_class_ref (klass);
2483 if (! METHOD_NATIVE (method) || ! flag_jni)
2486 DECL_ARTIFICIAL (method) = 1;
2487 DECL_EXTERNAL (method) = 0;
2489 env_var = build_decl (VAR_DECL, get_identifier ("env"), ptr_type_node);
2490 DECL_CONTEXT (env_var) = method;
2492 if (TREE_TYPE (TREE_TYPE (method)) != void_type_node)
2494 res_var = build_decl (VAR_DECL, get_identifier ("res"),
2495 TREE_TYPE (TREE_TYPE (method)));
2496 DECL_CONTEXT (res_var) = method;
2497 TREE_CHAIN (env_var) = res_var;
2500 meth_var = build_decl (VAR_DECL, get_identifier ("meth"), ptr_type_node);
2501 TREE_STATIC (meth_var) = 1;
2502 TREE_PUBLIC (meth_var) = 0;
2503 DECL_EXTERNAL (meth_var) = 0;
2504 DECL_CONTEXT (meth_var) = method;
2505 DECL_ARTIFICIAL (meth_var) = 1;
2506 DECL_INITIAL (meth_var) = null_pointer_node;
2507 TREE_USED (meth_var) = 1;
2508 chainon (env_var, meth_var);
2509 build_result_decl (method);
2511 /* One strange way that the front ends are different is that they
2512 store arguments differently. */
2514 method_args = DECL_ARGUMENTS (method);
2516 method_args = BLOCK_EXPR_DECLS (DECL_FUNCTION_BODY (method));
2517 block = build_block (env_var, NULL_TREE, method_args, NULL_TREE);
2518 TREE_SIDE_EFFECTS (block) = 1;
2519 /* When compiling from source we don't set the type of the block,
2520 because that will prevent patch_return from ever being run. */
2522 TREE_TYPE (block) = TREE_TYPE (TREE_TYPE (method));
2524 /* Compute the local `env' by calling _Jv_GetJNIEnvNewFrame. */
2525 body = build2 (MODIFY_EXPR, ptr_type_node, env_var,
2526 build3 (CALL_EXPR, ptr_type_node,
2527 build_address_of (soft_getjnienvnewframe_node),
2528 build_tree_list (NULL_TREE, klass),
2530 CAN_COMPLETE_NORMALLY (body) = 1;
2532 /* All the arguments to this method become arguments to the
2533 underlying JNI function. If we had to wrap object arguments in a
2534 special way, we would do that here. */
2536 for (tem = method_args; tem != NULL_TREE; tem = TREE_CHAIN (tem))
2538 int arg_bits = TREE_INT_CST_LOW (TYPE_SIZE (TREE_TYPE (tem)));
2539 #ifdef PARM_BOUNDARY
2540 arg_bits = (((arg_bits + PARM_BOUNDARY - 1) / PARM_BOUNDARY)
2543 args_size += (arg_bits / BITS_PER_UNIT);
2545 args = tree_cons (NULL_TREE, tem, args);
2547 args = nreverse (args);
2548 arg_types = TYPE_ARG_TYPES (TREE_TYPE (method));
2550 /* For a static method the second argument is the class. For a
2551 non-static method the second argument is `this'; that is already
2552 available in the argument list. */
2553 if (METHOD_STATIC (method))
2555 args_size += int_size_in_bytes (TREE_TYPE (klass));
2556 args = tree_cons (NULL_TREE, klass, args);
2557 arg_types = tree_cons (NULL_TREE, object_ptr_type_node, arg_types);
2560 /* The JNIEnv structure is the first argument to the JNI function. */
2561 args_size += int_size_in_bytes (TREE_TYPE (env_var));
2562 args = tree_cons (NULL_TREE, env_var, args);
2563 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
2565 /* We call _Jv_LookupJNIMethod to find the actual underlying
2566 function pointer. _Jv_LookupJNIMethod will throw the appropriate
2567 exception if this function is not found at runtime. */
2568 tem = build_tree_list (NULL_TREE, build_int_cst (NULL_TREE, args_size));
2569 method_sig = build_java_signature (TREE_TYPE (method));
2570 lookup_arg = tree_cons (NULL_TREE,
2571 build_utf8_ref (unmangle_classname
2572 (IDENTIFIER_POINTER (method_sig),
2573 IDENTIFIER_LENGTH (method_sig))),
2575 tem = DECL_NAME (method);
2577 = tree_cons (NULL_TREE, klass,
2578 tree_cons (NULL_TREE, build_utf8_ref (tem), lookup_arg));
2580 tem = build_function_type (TREE_TYPE (TREE_TYPE (method)), arg_types);
2582 #ifdef MODIFY_JNI_METHOD_CALL
2583 tem = MODIFY_JNI_METHOD_CALL (tem);
2586 jni_func_type = build_pointer_type (tem);
2588 jnifunc = build3 (COND_EXPR, ptr_type_node,
2590 build2 (MODIFY_EXPR, ptr_type_node, meth_var,
2591 build3 (CALL_EXPR, ptr_type_node,
2593 (soft_lookupjnimethod_node),
2594 lookup_arg, NULL_TREE)));
2596 /* Now we make the actual JNI call via the resulting function
2598 call = build3 (CALL_EXPR, TREE_TYPE (TREE_TYPE (method)),
2599 build1 (NOP_EXPR, jni_func_type, jnifunc),
2602 /* If the JNI call returned a result, capture it here. If we had to
2603 unwrap JNI object results, we would do that here. */
2604 if (res_var != NULL_TREE)
2605 call = build2 (MODIFY_EXPR, TREE_TYPE (TREE_TYPE (method)),
2608 TREE_SIDE_EFFECTS (call) = 1;
2609 CAN_COMPLETE_NORMALLY (call) = 1;
2611 body = build2 (COMPOUND_EXPR, void_type_node, body, call);
2612 TREE_SIDE_EFFECTS (body) = 1;
2614 /* Now free the environment we allocated. */
2615 call = build3 (CALL_EXPR, ptr_type_node,
2616 build_address_of (soft_jnipopsystemframe_node),
2617 build_tree_list (NULL_TREE, env_var),
2619 TREE_SIDE_EFFECTS (call) = 1;
2620 CAN_COMPLETE_NORMALLY (call) = 1;
2621 body = build2 (COMPOUND_EXPR, void_type_node, body, call);
2622 TREE_SIDE_EFFECTS (body) = 1;
2624 /* Finally, do the return. */
2625 res_type = void_type_node;
2626 if (res_var != NULL_TREE)
2629 if (! DECL_RESULT (method))
2631 /* Make sure we copy the result variable to the actual
2632 result. We use the type of the DECL_RESULT because it
2633 might be different from the return type of the function:
2634 it might be promoted. */
2635 drt = TREE_TYPE (DECL_RESULT (method));
2636 if (drt != TREE_TYPE (res_var))
2637 res_var = build1 (CONVERT_EXPR, drt, res_var);
2638 res_var = build2 (MODIFY_EXPR, drt, DECL_RESULT (method), res_var);
2639 TREE_SIDE_EFFECTS (res_var) = 1;
2642 body = build2 (COMPOUND_EXPR, void_type_node, body,
2643 build1 (RETURN_EXPR, res_type, res_var));
2644 TREE_SIDE_EFFECTS (body) = 1;
2646 bind = build3 (BIND_EXPR, void_type_node, BLOCK_VARS (block),
2651 /* Expand an operation to extract from or store into a field.
2652 IS_STATIC is 1 iff the field is static.
2653 IS_PUTTING is 1 for putting into a field; 0 for getting from the field.
2654 FIELD_REF_INDEX is an index into the constant pool. */
2657 expand_java_field_op (int is_static, int is_putting, int field_ref_index)
2660 = get_class_constant (current_jcf,
2661 COMPONENT_REF_CLASS_INDEX (¤t_jcf->cpool,
2663 const char *self_name
2664 = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (self_type)));
2665 tree field_name = COMPONENT_REF_NAME (¤t_jcf->cpool, field_ref_index);
2666 tree field_signature = COMPONENT_REF_SIGNATURE (¤t_jcf->cpool,
2668 tree field_type = get_type_from_signature (field_signature);
2669 tree new_value = is_putting ? pop_value (field_type) : NULL_TREE;
2672 tree original_self_type = self_type;
2675 if (! CLASS_LOADED_P (self_type))
2676 load_class (self_type, 1);
2677 field_decl = lookup_field (&self_type, field_name);
2678 if (field_decl == error_mark_node)
2682 else if (field_decl == NULL_TREE)
2684 if (! flag_verify_invocations)
2686 int flags = ACC_PUBLIC;
2688 flags |= ACC_STATIC;
2689 self_type = original_self_type;
2690 field_decl = add_field (original_self_type, field_name,
2692 DECL_ARTIFICIAL (field_decl) = 1;
2693 DECL_IGNORED_P (field_decl) = 1;
2697 error ("missing field '%s' in '%s'",
2698 IDENTIFIER_POINTER (field_name), self_name);
2702 else if (build_java_signature (TREE_TYPE (field_decl)) != field_signature)
2704 error ("mismatching signature for field '%s' in '%s'",
2705 IDENTIFIER_POINTER (field_name), self_name);
2708 field_ref = is_static ? NULL_TREE : pop_value (self_type);
2712 push_value (convert (field_type, integer_zero_node));
2713 flush_quick_stack ();
2717 field_ref = build_field_ref (field_ref, self_type, field_name);
2719 && ! flag_indirect_dispatch)
2720 field_ref = build_class_init (self_type, field_ref);
2723 flush_quick_stack ();
2724 if (FIELD_FINAL (field_decl))
2726 if (DECL_CONTEXT (field_decl) != current_class)
2727 error ("%Jassignment to final field '%D' not in field's class",
2728 field_decl, field_decl);
2729 else if (FIELD_STATIC (field_decl))
2731 if (!DECL_CLINIT_P (current_function_decl))
2732 warning (0, "%Jassignment to final static field %qD not in "
2733 "class initializer",
2734 field_decl, field_decl);
2738 tree cfndecl_name = DECL_NAME (current_function_decl);
2739 if (! DECL_CONSTRUCTOR_P (current_function_decl)
2740 && !ID_FINIT_P (cfndecl_name))
2741 warning (0, "%Jassignment to final field '%D' not in constructor",
2742 field_decl, field_decl);
2745 java_add_stmt (build2 (MODIFY_EXPR, TREE_TYPE (field_ref),
2746 field_ref, new_value));
2749 push_value (field_ref);
2753 load_type_state (tree label)
2756 tree vec = LABEL_TYPE_STATE (label);
2757 int cur_length = TREE_VEC_LENGTH (vec);
2758 stack_pointer = cur_length - DECL_MAX_LOCALS(current_function_decl);
2759 for (i = 0; i < cur_length; i++)
2760 type_map [i] = TREE_VEC_ELT (vec, i);
2763 /* Go over METHOD's bytecode and note instruction starts in
2764 instruction_bits[]. */
2767 note_instructions (JCF *jcf, tree method)
2770 unsigned char* byte_ops;
2771 long length = DECL_CODE_LENGTH (method);
2776 #undef RET /* Defined by config/i386/i386.h */
2778 #define BCODE byte_ops
2779 #define BYTE_type_node byte_type_node
2780 #define SHORT_type_node short_type_node
2781 #define INT_type_node int_type_node
2782 #define LONG_type_node long_type_node
2783 #define CHAR_type_node char_type_node
2784 #define PTR_type_node ptr_type_node
2785 #define FLOAT_type_node float_type_node
2786 #define DOUBLE_type_node double_type_node
2787 #define VOID_type_node void_type_node
2788 #define CONST_INDEX_1 (saw_index = 1, IMMEDIATE_u1)
2789 #define CONST_INDEX_2 (saw_index = 1, IMMEDIATE_u2)
2790 #define VAR_INDEX_1 (saw_index = 1, IMMEDIATE_u1)
2791 #define VAR_INDEX_2 (saw_index = 1, IMMEDIATE_u2)
2793 #define CHECK_PC_IN_RANGE(PC) ((void)1) /* Already handled by verifier. */
2795 JCF_SEEK (jcf, DECL_CODE_OFFSET (method));
2796 byte_ops = jcf->read_ptr;
2797 instruction_bits = xrealloc (instruction_bits, length + 1);
2798 memset (instruction_bits, 0, length + 1);
2800 /* This pass figures out which PC can be the targets of jumps. */
2801 for (PC = 0; PC < length;)
2803 int oldpc = PC; /* PC at instruction start. */
2804 instruction_bits [PC] |= BCODE_INSTRUCTION_START;
2805 switch (byte_ops[PC++])
2807 #define JAVAOP(OPNAME, OPCODE, OPKIND, OPERAND_TYPE, OPERAND_VALUE) \
2809 PRE_##OPKIND(OPERAND_TYPE, OPERAND_VALUE); \
2812 #define NOTE_LABEL(PC) note_label(oldpc, PC)
2814 #define PRE_PUSHC(OPERAND_TYPE, OPERAND_VALUE) (void)(OPERAND_VALUE);
2815 #define PRE_LOAD(OPERAND_TYPE, OPERAND_VALUE) (void)(OPERAND_VALUE);
2816 #define PRE_STORE(OPERAND_TYPE, OPERAND_VALUE) (void)(OPERAND_VALUE);
2817 #define PRE_STACK(OPERAND_TYPE, OPERAND_VALUE) /* nothing */
2818 #define PRE_UNOP(OPERAND_TYPE, OPERAND_VALUE) /* nothing */
2819 #define PRE_BINOP(OPERAND_TYPE, OPERAND_VALUE) /* nothing */
2820 #define PRE_CONVERT(OPERAND_TYPE, OPERAND_VALUE) /* nothing */
2821 #define PRE_CONVERT2(OPERAND_TYPE, OPERAND_VALUE) /* nothing */
2823 #define PRE_SPECIAL(OPERAND_TYPE, INSTRUCTION) \
2824 PRE_SPECIAL_##INSTRUCTION(OPERAND_TYPE)
2825 #define PRE_SPECIAL_IINC(OPERAND_TYPE) \
2826 ((void) IMMEDIATE_u1, (void) IMMEDIATE_s1)
2827 #define PRE_SPECIAL_ENTER(IGNORE) /* nothing */
2828 #define PRE_SPECIAL_EXIT(IGNORE) /* nothing */
2829 #define PRE_SPECIAL_THROW(IGNORE) /* nothing */
2830 #define PRE_SPECIAL_BREAK(IGNORE) /* nothing */
2832 /* two forms of wide instructions */
2833 #define PRE_SPECIAL_WIDE(IGNORE) \
2835 int modified_opcode = IMMEDIATE_u1; \
2836 if (modified_opcode == OPCODE_iinc) \
2838 (void) IMMEDIATE_u2; /* indexbyte1 and indexbyte2 */ \
2839 (void) IMMEDIATE_s2; /* constbyte1 and constbyte2 */ \
2843 (void) IMMEDIATE_u2; /* indexbyte1 and indexbyte2 */ \
2847 #define PRE_IMPL(IGNORE1, IGNORE2) /* nothing */
2849 #define PRE_MONITOR(OPERAND_TYPE, OPERAND_VALUE) /* nothing */
2851 #define PRE_RETURN(OPERAND_TYPE, OPERAND_VALUE) /* nothing */
2852 #define PRE_ARRAY(OPERAND_TYPE, SUBOP) \
2853 PRE_ARRAY_##SUBOP(OPERAND_TYPE)
2854 #define PRE_ARRAY_LOAD(TYPE) /* nothing */
2855 #define PRE_ARRAY_STORE(TYPE) /* nothing */
2856 #define PRE_ARRAY_LENGTH(TYPE) /* nothing */
2857 #define PRE_ARRAY_NEW(TYPE) PRE_ARRAY_NEW_##TYPE
2858 #define PRE_ARRAY_NEW_NUM ((void) IMMEDIATE_u1)
2859 #define PRE_ARRAY_NEW_PTR ((void) IMMEDIATE_u2)
2860 #define PRE_ARRAY_NEW_MULTI ((void) IMMEDIATE_u2, (void) IMMEDIATE_u1)
2862 #define PRE_TEST(OPERAND_TYPE, OPERAND_VALUE) NOTE_LABEL (oldpc+IMMEDIATE_s2)
2863 #define PRE_COND(OPERAND_TYPE, OPERAND_VALUE) NOTE_LABEL (oldpc+IMMEDIATE_s2)
2864 #define PRE_BRANCH(OPERAND_TYPE, OPERAND_VALUE) \
2865 saw_index = 0; INT_temp = (OPERAND_VALUE); \
2866 if (!saw_index) NOTE_LABEL(oldpc + INT_temp);
2867 #define PRE_JSR(OPERAND_TYPE, OPERAND_VALUE) \
2868 saw_index = 0; INT_temp = (OPERAND_VALUE); \
2870 if (!saw_index) NOTE_LABEL(oldpc + INT_temp);
2872 #define PRE_RET(OPERAND_TYPE, OPERAND_VALUE) (void)(OPERAND_VALUE)
2874 #define PRE_SWITCH(OPERAND_TYPE, TABLE_OR_LOOKUP) \
2875 PC = (PC + 3) / 4 * 4; PRE_##TABLE_OR_LOOKUP##_SWITCH
2877 #define PRE_LOOKUP_SWITCH \
2878 { jint default_offset = IMMEDIATE_s4; jint npairs = IMMEDIATE_s4; \
2879 NOTE_LABEL (default_offset+oldpc); \
2881 while (--npairs >= 0) { \
2882 jint match ATTRIBUTE_UNUSED = IMMEDIATE_s4; \
2883 jint offset = IMMEDIATE_s4; \
2884 NOTE_LABEL (offset+oldpc); } \
2887 #define PRE_TABLE_SWITCH \
2888 { jint default_offset = IMMEDIATE_s4; \
2889 jint low = IMMEDIATE_s4; jint high = IMMEDIATE_s4; \
2890 NOTE_LABEL (default_offset+oldpc); \
2892 while (low++ <= high) { \
2893 jint offset = IMMEDIATE_s4; \
2894 NOTE_LABEL (offset+oldpc); } \
2897 #define PRE_FIELD(MAYBE_STATIC, PUT_OR_GET) (void)(IMMEDIATE_u2);
2898 #define PRE_OBJECT(MAYBE_STATIC, PUT_OR_GET) (void)(IMMEDIATE_u2);
2899 #define PRE_INVOKE(MAYBE_STATIC, IS_INTERFACE) \
2900 (void)(IMMEDIATE_u2); \
2901 PC += 2 * IS_INTERFACE /* for invokeinterface */;
2903 #include "javaop.def"
2910 expand_byte_code (JCF *jcf, tree method)
2914 const unsigned char *linenumber_pointer;
2915 int dead_code_index = -1;
2916 unsigned char* byte_ops;
2917 long length = DECL_CODE_LENGTH (method);
2920 JCF_SEEK (jcf, DECL_CODE_OFFSET (method));
2921 byte_ops = jcf->read_ptr;
2923 /* We make an initial pass of the line number table, to note
2924 which instructions have associated line number entries. */
2925 linenumber_pointer = linenumber_table;
2926 for (i = 0; i < linenumber_count; i++)
2928 int pc = GET_u2 (linenumber_pointer);
2929 linenumber_pointer += 4;
2931 warning (0, "invalid PC in line number table");
2934 if ((instruction_bits[pc] & BCODE_HAS_LINENUMBER) != 0)
2935 instruction_bits[pc] |= BCODE_HAS_MULTI_LINENUMBERS;
2936 instruction_bits[pc] |= BCODE_HAS_LINENUMBER;
2940 if (flag_new_verifier)
2942 if (! verify_jvm_instructions_new (jcf, byte_ops, length))
2947 if (! verify_jvm_instructions (jcf, byte_ops, length))
2951 promote_arguments ();
2953 /* Translate bytecodes. */
2954 linenumber_pointer = linenumber_table;
2955 for (PC = 0; PC < length;)
2957 if ((instruction_bits [PC] & BCODE_TARGET) != 0 || PC == 0)
2959 tree label = lookup_label (PC);
2960 flush_quick_stack ();
2961 if ((instruction_bits [PC] & BCODE_TARGET) != 0)
2962 java_add_stmt (build1 (LABEL_EXPR, void_type_node, label));
2963 if (LABEL_VERIFIED (label) || PC == 0)
2964 load_type_state (label);
2967 if (! (instruction_bits [PC] & BCODE_VERIFIED))
2969 if (dead_code_index == -1)
2971 /* This is the start of a region of unreachable bytecodes.
2972 They still need to be processed in order for EH ranges
2973 to get handled correctly. However, we can simply
2974 replace these bytecodes with nops. */
2975 dead_code_index = PC;
2978 /* Turn this bytecode into a nop. */
2983 if (dead_code_index != -1)
2985 /* We've just reached the end of a region of dead code. */
2987 warning (0, "unreachable bytecode from %d to before %d",
2988 dead_code_index, PC);
2989 dead_code_index = -1;
2993 /* Handle possible line number entry for this PC.
2995 This code handles out-of-order and multiple linenumbers per PC,
2996 but is optimized for the case of line numbers increasing
2997 monotonically with PC. */
2998 if ((instruction_bits[PC] & BCODE_HAS_LINENUMBER) != 0)
3000 if ((instruction_bits[PC] & BCODE_HAS_MULTI_LINENUMBERS) != 0
3001 || GET_u2 (linenumber_pointer) != PC)
3002 linenumber_pointer = linenumber_table;
3003 while (linenumber_pointer < linenumber_table + linenumber_count * 4)
3005 int pc = GET_u2 (linenumber_pointer);
3006 linenumber_pointer += 4;
3009 int line = GET_u2 (linenumber_pointer - 2);
3010 #ifdef USE_MAPPED_LOCATION
3011 input_location = linemap_line_start (&line_table, line, 1);
3013 input_location.line = line;
3015 if (!(instruction_bits[PC] & BCODE_HAS_MULTI_LINENUMBERS))
3020 maybe_pushlevels (PC);
3021 PC = process_jvm_instruction (PC, byte_ops, length);
3022 maybe_poplevels (PC);
3025 if (dead_code_index != -1)
3027 /* We've just reached the end of a region of dead code. */
3029 warning (0, "unreachable bytecode from %d to the end of the method",
3035 java_push_constant_from_pool (JCF *jcf, int index)
3038 if (JPOOL_TAG (jcf, index) == CONSTANT_String)
3041 name = get_name_constant (jcf, JPOOL_USHORT1 (jcf, index));
3042 index = alloc_name_constant (CONSTANT_String, name);
3043 c = build_ref_from_constant_pool (index);
3044 c = convert (promote_type (string_type_node), c);
3047 c = get_constant (jcf, index);
3052 process_jvm_instruction (int PC, const unsigned char* byte_ops,
3053 long length ATTRIBUTE_UNUSED)
3055 const char *opname; /* Temporary ??? */
3056 int oldpc = PC; /* PC at instruction start. */
3058 /* If the instruction is at the beginning of a exception handler,
3059 replace the top of the stack with the thrown object reference */
3060 if (instruction_bits [PC] & BCODE_EXCEPTION_TARGET)
3062 /* Note that the new verifier will not emit a type map at all
3063 for dead exception handlers. In this case we just ignore
3065 if (! flag_new_verifier || (instruction_bits[PC] & BCODE_VERIFIED) != 0)
3067 tree type = pop_type (promote_type (throwable_type_node));
3068 push_value (build_exception_object_ref (type));
3072 switch (byte_ops[PC++])
3074 #define JAVAOP(OPNAME, OPCODE, OPKIND, OPERAND_TYPE, OPERAND_VALUE) \
3077 OPKIND(OPERAND_TYPE, OPERAND_VALUE); \
3080 #define RET(OPERAND_TYPE, OPERAND_VALUE) \
3082 int saw_index = 0; \
3083 int index = OPERAND_VALUE; \
3085 (find_local_variable (index, return_address_type_node, oldpc)); \
3088 #define JSR(OPERAND_TYPE, OPERAND_VALUE) \
3090 /* OPERAND_VALUE may have side-effects on PC */ \
3091 int opvalue = OPERAND_VALUE; \
3092 build_java_jsr (oldpc + opvalue, PC); \
3095 /* Push a constant onto the stack. */
3096 #define PUSHC(OPERAND_TYPE, OPERAND_VALUE) \
3097 { int saw_index = 0; int ival = (OPERAND_VALUE); \
3098 if (saw_index) java_push_constant_from_pool (current_jcf, ival); \
3099 else expand_java_pushc (ival, OPERAND_TYPE##_type_node); }
3101 /* internal macro added for use by the WIDE case */
3102 #define LOAD_INTERNAL(OPTYPE, OPVALUE) \
3103 expand_load_internal (OPVALUE, type_map[OPVALUE], oldpc);
3105 /* Push local variable onto the opcode stack. */
3106 #define LOAD(OPERAND_TYPE, OPERAND_VALUE) \
3108 /* have to do this since OPERAND_VALUE may have side-effects */ \
3109 int opvalue = OPERAND_VALUE; \
3110 LOAD_INTERNAL(OPERAND_TYPE##_type_node, opvalue); \
3113 #define RETURN(OPERAND_TYPE, OPERAND_VALUE) \
3114 expand_java_return (OPERAND_TYPE##_type_node)
3116 #define REM_EXPR TRUNC_MOD_EXPR
3117 #define BINOP(OPERAND_TYPE, OPERAND_VALUE) \
3118 expand_java_binop (OPERAND_TYPE##_type_node, OPERAND_VALUE##_EXPR)
3120 #define FIELD(IS_STATIC, IS_PUT) \
3121 expand_java_field_op (IS_STATIC, IS_PUT, IMMEDIATE_u2)
3123 #define TEST(OPERAND_TYPE, CONDITION) \
3124 expand_test (CONDITION##_EXPR, OPERAND_TYPE##_type_node, oldpc+IMMEDIATE_s2)
3126 #define COND(OPERAND_TYPE, CONDITION) \
3127 expand_cond (CONDITION##_EXPR, OPERAND_TYPE##_type_node, oldpc+IMMEDIATE_s2)
3129 #define BRANCH(OPERAND_TYPE, OPERAND_VALUE) \
3130 BRANCH_##OPERAND_TYPE (OPERAND_VALUE)
3132 #define BRANCH_GOTO(OPERAND_VALUE) \
3133 expand_java_goto (oldpc + OPERAND_VALUE)
3135 #define BRANCH_CALL(OPERAND_VALUE) \
3136 expand_java_call (oldpc + OPERAND_VALUE, oldpc)
3139 #define BRANCH_RETURN(OPERAND_VALUE) \
3141 tree type = OPERAND_TYPE##_type_node; \
3142 tree value = find_local_variable (OPERAND_VALUE, type, oldpc); \
3143 expand_java_ret (value); \
3147 #define NOT_IMPL(OPERAND_TYPE, OPERAND_VALUE) \
3148 fprintf (stderr, "%3d: %s ", oldpc, opname); \
3149 fprintf (stderr, "(not implemented)\n")
3150 #define NOT_IMPL1(OPERAND_VALUE) \
3151 fprintf (stderr, "%3d: %s ", oldpc, opname); \
3152 fprintf (stderr, "(not implemented)\n")
3154 #define BRANCH_RETURN(OPERAND_VALUE) NOT_IMPL1(OPERAND_VALUE)
3156 #define STACK(SUBOP, COUNT) STACK_##SUBOP (COUNT)
3158 #define STACK_POP(COUNT) java_stack_pop (COUNT)
3160 #define STACK_SWAP(COUNT) java_stack_swap()
3162 #define STACK_DUP(COUNT) java_stack_dup (COUNT, 0)
3163 #define STACK_DUPx1(COUNT) java_stack_dup (COUNT, 1)
3164 #define STACK_DUPx2(COUNT) java_stack_dup (COUNT, 2)
3166 #define SWITCH(OPERAND_TYPE, TABLE_OR_LOOKUP) \
3167 PC = (PC + 3) / 4 * 4; TABLE_OR_LOOKUP##_SWITCH
3169 #define LOOKUP_SWITCH \
3170 { jint default_offset = IMMEDIATE_s4; jint npairs = IMMEDIATE_s4; \
3171 tree selector = pop_value (INT_type_node); \
3172 tree switch_expr = expand_java_switch (selector, oldpc + default_offset); \
3173 while (--npairs >= 0) \
3175 jint match = IMMEDIATE_s4; jint offset = IMMEDIATE_s4; \
3176 expand_java_add_case (switch_expr, match, oldpc + offset); \
3180 #define TABLE_SWITCH \
3181 { jint default_offset = IMMEDIATE_s4; \
3182 jint low = IMMEDIATE_s4; jint high = IMMEDIATE_s4; \
3183 tree selector = pop_value (INT_type_node); \
3184 tree switch_expr = expand_java_switch (selector, oldpc + default_offset); \
3185 for (; low <= high; low++) \
3187 jint offset = IMMEDIATE_s4; \
3188 expand_java_add_case (switch_expr, low, oldpc + offset); \
3192 #define INVOKE(MAYBE_STATIC, IS_INTERFACE) \
3193 { int opcode = byte_ops[PC-1]; \
3194 int method_ref_index = IMMEDIATE_u2; \
3196 if (IS_INTERFACE) { nargs = IMMEDIATE_u1; (void) IMMEDIATE_u1; } \
3198 expand_invoke (opcode, method_ref_index, nargs); \
3201 /* Handle new, checkcast, instanceof */
3202 #define OBJECT(TYPE, OP) \
3203 expand_java_##OP (get_class_constant (current_jcf, IMMEDIATE_u2))
3205 #define ARRAY(OPERAND_TYPE, SUBOP) ARRAY_##SUBOP(OPERAND_TYPE)
3207 #define ARRAY_LOAD(OPERAND_TYPE) \
3209 expand_java_arrayload( OPERAND_TYPE##_type_node ); \
3212 #define ARRAY_STORE(OPERAND_TYPE) \
3214 expand_java_arraystore( OPERAND_TYPE##_type_node ); \
3217 #define ARRAY_LENGTH(OPERAND_TYPE) expand_java_array_length();
3218 #define ARRAY_NEW(OPERAND_TYPE) ARRAY_NEW_##OPERAND_TYPE()
3219 #define ARRAY_NEW_PTR() \
3220 push_value (build_anewarray (get_class_constant (current_jcf, \
3222 pop_value (int_type_node)));
3223 #define ARRAY_NEW_NUM() \
3225 int atype = IMMEDIATE_u1; \
3226 push_value (build_newarray (atype, pop_value (int_type_node)));\
3228 #define ARRAY_NEW_MULTI() \
3230 tree class = get_class_constant (current_jcf, IMMEDIATE_u2 ); \
3231 int ndims = IMMEDIATE_u1; \
3232 expand_java_multianewarray( class, ndims ); \
3235 #define UNOP(OPERAND_TYPE, OPERAND_VALUE) \
3236 push_value (fold (build1 (NEGATE_EXPR, OPERAND_TYPE##_type_node, \
3237 pop_value (OPERAND_TYPE##_type_node))));
3239 #define CONVERT2(FROM_TYPE, TO_TYPE) \
3241 push_value (build1 (NOP_EXPR, int_type_node, \
3242 (convert (TO_TYPE##_type_node, \
3243 pop_value (FROM_TYPE##_type_node))))); \
3246 #define CONVERT(FROM_TYPE, TO_TYPE) \
3248 push_value (convert (TO_TYPE##_type_node, \
3249 pop_value (FROM_TYPE##_type_node))); \
3252 /* internal macro added for use by the WIDE case
3253 Added TREE_TYPE (decl) assignment, apbianco */
3254 #define STORE_INTERNAL(OPTYPE, OPVALUE) \
3257 int index = OPVALUE; \
3258 tree type = OPTYPE; \
3259 value = pop_value (type); \
3260 type = TREE_TYPE (value); \
3261 decl = find_local_variable (index, type, oldpc); \
3262 set_local_type (index, type); \
3263 java_add_stmt (build2 (MODIFY_EXPR, type, decl, value)); \
3264 update_aliases (decl, index, PC); \
3267 #define STORE(OPERAND_TYPE, OPERAND_VALUE) \
3269 /* have to do this since OPERAND_VALUE may have side-effects */ \
3270 int opvalue = OPERAND_VALUE; \
3271 STORE_INTERNAL(OPERAND_TYPE##_type_node, opvalue); \
3274 #define SPECIAL(OPERAND_TYPE, INSTRUCTION) \
3275 SPECIAL_##INSTRUCTION(OPERAND_TYPE)
3277 #define SPECIAL_ENTER(IGNORED) MONITOR_OPERATION (soft_monitorenter_node)
3278 #define SPECIAL_EXIT(IGNORED) MONITOR_OPERATION (soft_monitorexit_node)
3280 #define MONITOR_OPERATION(call) \
3282 tree o = pop_value (ptr_type_node); \
3284 flush_quick_stack (); \
3285 c = build_java_monitor (call, o); \
3286 TREE_SIDE_EFFECTS (c) = 1; \
3287 java_add_stmt (c); \
3290 #define SPECIAL_IINC(IGNORED) \
3292 unsigned int local_var_index = IMMEDIATE_u1; \
3293 int ival = IMMEDIATE_s1; \
3294 expand_iinc(local_var_index, ival, oldpc); \
3297 #define SPECIAL_WIDE(IGNORED) \
3299 int modified_opcode = IMMEDIATE_u1; \
3300 unsigned int local_var_index = IMMEDIATE_u2; \
3301 switch (modified_opcode) \
3305 int ival = IMMEDIATE_s2; \
3306 expand_iinc (local_var_index, ival, oldpc); \
3309 case OPCODE_iload: \
3310 case OPCODE_lload: \
3311 case OPCODE_fload: \
3312 case OPCODE_dload: \
3313 case OPCODE_aload: \
3315 /* duplicate code from LOAD macro */ \
3316 LOAD_INTERNAL(operand_type[modified_opcode], local_var_index); \
3319 case OPCODE_istore: \
3320 case OPCODE_lstore: \
3321 case OPCODE_fstore: \
3322 case OPCODE_dstore: \
3323 case OPCODE_astore: \
3325 STORE_INTERNAL(operand_type[modified_opcode], local_var_index); \
3329 error ("unrecogized wide sub-instruction"); \
3333 #define SPECIAL_THROW(IGNORED) \
3334 build_java_athrow (pop_value (throwable_type_node))
3336 #define SPECIAL_BREAK NOT_IMPL1
3337 #define IMPL NOT_IMPL
3339 #include "javaop.def"
3342 fprintf (stderr, "%3d: unknown(%3d)\n", oldpc, byte_ops[PC]);
3347 /* Return the opcode at PC in the code section pointed to by
3350 static unsigned char
3351 peek_opcode_at_pc (JCF *jcf, int code_offset, int pc)
3353 unsigned char opcode;
3354 long absolute_offset = (long)JCF_TELL (jcf);
3356 JCF_SEEK (jcf, code_offset);
3357 opcode = jcf->read_ptr [pc];
3358 JCF_SEEK (jcf, absolute_offset);
3362 /* Some bytecode compilers are emitting accurate LocalVariableTable
3363 attributes. Here's an example:
3368 Attribute "LocalVariableTable"
3369 slot #<n>: ... (PC: PC+1 length: L)
3371 This is accurate because the local in slot <n> really exists after
3372 the opcode at PC is executed, hence from PC+1 to PC+1+L.
3374 This procedure recognizes this situation and extends the live range
3375 of the local in SLOT to START_PC-1 or START_PC-2 (depending on the
3376 length of the store instruction.)
3378 This function is used by `give_name_to_locals' so that a local's
3379 DECL features a DECL_LOCAL_START_PC such that the first related
3380 store operation will use DECL as a destination, not a unrelated
3381 temporary created for the occasion.
3383 This function uses a global (instruction_bits) `note_instructions' should
3384 have allocated and filled properly. */
3387 maybe_adjust_start_pc (struct JCF *jcf, int code_offset,
3388 int start_pc, int slot)
3390 int first, index, opcode;
3399 /* Find last previous instruction and remember it */
3400 for (pc = start_pc-1; pc; pc--)
3401 if (instruction_bits [pc] & BCODE_INSTRUCTION_START)
3405 /* Retrieve the instruction, handle `wide'. */
3406 opcode = (int) peek_opcode_at_pc (jcf, code_offset, pc++);
3407 if (opcode == OPCODE_wide)
3410 opcode = (int) peek_opcode_at_pc (jcf, code_offset, pc++);
3415 case OPCODE_astore_0:
3416 case OPCODE_astore_1:
3417 case OPCODE_astore_2:
3418 case OPCODE_astore_3:
3419 first = OPCODE_astore_0;
3422 case OPCODE_istore_0:
3423 case OPCODE_istore_1:
3424 case OPCODE_istore_2:
3425 case OPCODE_istore_3:
3426 first = OPCODE_istore_0;
3429 case OPCODE_lstore_0:
3430 case OPCODE_lstore_1:
3431 case OPCODE_lstore_2:
3432 case OPCODE_lstore_3:
3433 first = OPCODE_lstore_0;
3436 case OPCODE_fstore_0:
3437 case OPCODE_fstore_1:
3438 case OPCODE_fstore_2:
3439 case OPCODE_fstore_3:
3440 first = OPCODE_fstore_0;
3443 case OPCODE_dstore_0:
3444 case OPCODE_dstore_1:
3445 case OPCODE_dstore_2:
3446 case OPCODE_dstore_3:
3447 first = OPCODE_dstore_0;
3455 index = peek_opcode_at_pc (jcf, code_offset, pc);
3458 int other = peek_opcode_at_pc (jcf, code_offset, ++pc);
3459 index = (other << 8) + index;
3464 /* Now we decide: first >0 means we have a <t>store_<n>, index >0
3465 means we have a <t>store. */
3466 if ((first > 0 && opcode - first == slot) || (index > 0 && index == slot))
3472 /* Force the (direct) sub-operands of NODE to be evaluated in left-to-right
3473 order, as specified by Java Language Specification.
3475 The problem is that while expand_expr will evaluate its sub-operands in
3476 left-to-right order, for variables it will just return an rtx (i.e.
3477 an lvalue) for the variable (rather than an rvalue). So it is possible
3478 that a later sub-operand will change the register, and when the
3479 actual operation is done, it will use the new value, when it should
3480 have used the original value.
3482 We fix this by using save_expr. This forces the sub-operand to be
3483 copied into a fresh virtual register,
3485 For method invocation, we modify the arguments so that a
3486 left-to-right order evaluation is performed. Saved expressions
3487 will, in CALL_EXPR order, be reused when the call will be expanded.
3489 We also promote outgoing args if needed. */
3492 force_evaluation_order (tree node)
3494 if (flag_syntax_only)
3496 if (TREE_CODE (node) == CALL_EXPR
3497 || TREE_CODE (node) == NEW_CLASS_EXPR
3498 || (TREE_CODE (node) == COMPOUND_EXPR
3499 && TREE_CODE (TREE_OPERAND (node, 0)) == CALL_EXPR
3500 && TREE_CODE (TREE_OPERAND (node, 1)) == SAVE_EXPR))
3506 /* Position arg properly, account for wrapped around ctors. */
3507 if (TREE_CODE (node) == COMPOUND_EXPR)
3508 arg = TREE_OPERAND (node, 0);
3510 arg = TREE_OPERAND (arg, 1);
3512 /* An empty argument list is ok, just ignore it. */
3516 /* Not having a list of arguments here is an error. */
3517 if (TREE_CODE (arg) != TREE_LIST)
3520 /* This reverses the evaluation order. This is a desired effect. */
3521 for (cmp = NULL_TREE; arg; arg = TREE_CHAIN (arg))
3523 /* Promote types smaller than integer. This is r