1 /* Java(TM) language-specific gimplification routines.
2 Copyright (C) 2003, 2004, 2006, 2007, 2007, 2008
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 3, 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 COPYING3. If not see
19 <http://www.gnu.org/licenses/>.
21 Java and all Java-based marks are trademarks or registered trademarks
22 of Sun Microsystems, Inc. in the United States and other countries.
23 The Free Software Foundation is independent of Sun Microsystems, Inc. */
27 #include "coretypes.h"
30 #include "java-tree.h"
31 #include "tree-dump.h"
35 static tree
java_gimplify_block (tree
);
36 static enum gimplify_status
java_gimplify_modify_expr (tree
*);
37 static enum gimplify_status
java_gimplify_self_mod_expr (tree
*, gimple_seq
*,
40 static void dump_java_tree (enum tree_dump_index
, tree
);
42 /* Convert a Java tree to GENERIC. */
45 java_genericize (tree fndecl
)
47 walk_tree (&DECL_SAVED_TREE (fndecl
), java_replace_references
, NULL
, NULL
);
48 dump_java_tree (TDI_original
, fndecl
);
51 /* Gimplify a Java tree. */
54 java_gimplify_expr (tree
*expr_p
, gimple_seq
*pre_p
, gimple_seq
*post_p
)
56 enum tree_code code
= TREE_CODE (*expr_p
);
61 *expr_p
= java_gimplify_block (*expr_p
);
65 return java_gimplify_modify_expr (expr_p
);
67 case POSTINCREMENT_EXPR
:
68 case POSTDECREMENT_EXPR
:
69 case PREINCREMENT_EXPR
:
70 case PREDECREMENT_EXPR
:
71 return java_gimplify_self_mod_expr (expr_p
, pre_p
, post_p
);
73 /* These should already be lowered before we get here. */
87 static enum gimplify_status
88 java_gimplify_modify_expr (tree
*modify_expr_p
)
90 tree modify_expr
= *modify_expr_p
;
91 tree lhs
= TREE_OPERAND (modify_expr
, 0);
92 tree rhs
= TREE_OPERAND (modify_expr
, 1);
93 tree lhs_type
= TREE_TYPE (lhs
);
95 if (lhs_type
!= TREE_TYPE (rhs
))
96 /* Fix up type mismatches to make legal GIMPLE. These are
97 generated in several places, in particular null pointer
98 assignment and subclass assignment. */
99 TREE_OPERAND (modify_expr
, 1) = convert (lhs_type
, rhs
);
104 /* Special case handling for volatiles: we need to generate a barrier
105 between the reading and the writing. */
107 static enum gimplify_status
108 java_gimplify_self_mod_expr (tree
*expr_p
, gimple_seq
*pre_p ATTRIBUTE_UNUSED
,
109 gimple_seq
*post_p ATTRIBUTE_UNUSED
)
111 tree lhs
= TREE_OPERAND (*expr_p
, 0);
113 if (TREE_CODE (lhs
) == COMPONENT_REF
114 && TREE_THIS_VOLATILE (TREE_OPERAND (lhs
, 1)))
115 TREE_THIS_VOLATILE (lhs
) = 1;
121 /* Gimplify BLOCK into a BIND_EXPR. */
124 java_gimplify_block (tree java_block
)
126 tree decls
= BLOCK_VARS (java_block
);
127 tree body
= BLOCK_EXPR_BODY (java_block
);
128 gimple outer
= gimple_current_bind_expr ();
131 /* Don't bother with empty blocks. */
133 return build_empty_stmt (input_location
);
135 if (IS_EMPTY_STMT (body
))
138 /* Make a proper block. Java blocks are unsuitable for BIND_EXPR
139 because they use BLOCK_SUBBLOCKS for another purpose. */
140 block
= make_node (BLOCK
);
141 BLOCK_VARS (block
) = decls
;
143 /* The TREE_USED flag on a block determines whether the debug output
144 routines generate info for the variables in that block. */
145 TREE_USED (block
) = 1;
149 tree b
= gimple_bind_block (outer
);
150 BLOCK_SUBBLOCKS (b
) = chainon (BLOCK_SUBBLOCKS (b
), block
);
152 BLOCK_EXPR_BODY (java_block
) = NULL_TREE
;
154 return build3 (BIND_EXPR
, TREE_TYPE (java_block
), decls
, body
, block
);
157 /* Dump a tree of some kind. This is a convenience wrapper for the
158 dump_* functions in tree-dump.c. */
160 dump_java_tree (enum tree_dump_index phase
, tree t
)
165 stream
= dump_begin (phase
, &flags
);
169 dump_node (t
, flags
, stream
);
170 dump_end (phase
, stream
);