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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [java/] [java-gimplify.c] - Rev 433
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/* Java(TM) language-specific gimplification routines. Copyright (C) 2003, 2004, 2006, 2007, 2007, 2008 Free Software Foundation, Inc. This file is part of GCC. GCC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. GCC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GCC; see the file COPYING3. If not see <http://www.gnu.org/licenses/>. Java and all Java-based marks are trademarks or registered trademarks of Sun Microsystems, Inc. in the United States and other countries. The Free Software Foundation is independent of Sun Microsystems, Inc. */ #include "config.h" #include "system.h" #include "coretypes.h" #include "tm.h" #include "tree.h" #include "java-tree.h" #include "tree-dump.h" #include "gimple.h" #include "toplev.h" static tree java_gimplify_block (tree); static enum gimplify_status java_gimplify_modify_expr (tree *); static enum gimplify_status java_gimplify_self_mod_expr (tree *, gimple_seq *, gimple_seq *); static void dump_java_tree (enum tree_dump_index, tree); /* Convert a Java tree to GENERIC. */ void java_genericize (tree fndecl) { walk_tree (&DECL_SAVED_TREE (fndecl), java_replace_references, NULL, NULL); dump_java_tree (TDI_original, fndecl); } /* Gimplify a Java tree. */ int java_gimplify_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p) { enum tree_code code = TREE_CODE (*expr_p); switch (code) { case BLOCK: *expr_p = java_gimplify_block (*expr_p); break; case MODIFY_EXPR: return java_gimplify_modify_expr (expr_p); case POSTINCREMENT_EXPR: case POSTDECREMENT_EXPR: case PREINCREMENT_EXPR: case PREDECREMENT_EXPR: return java_gimplify_self_mod_expr (expr_p, pre_p, post_p); /* These should already be lowered before we get here. */ case URSHIFT_EXPR: case COMPARE_EXPR: case COMPARE_L_EXPR: case COMPARE_G_EXPR: gcc_unreachable (); default: return GS_UNHANDLED; } return GS_OK; } static enum gimplify_status java_gimplify_modify_expr (tree *modify_expr_p) { tree modify_expr = *modify_expr_p; tree lhs = TREE_OPERAND (modify_expr, 0); tree rhs = TREE_OPERAND (modify_expr, 1); tree lhs_type = TREE_TYPE (lhs); if (lhs_type != TREE_TYPE (rhs)) /* Fix up type mismatches to make legal GIMPLE. These are generated in several places, in particular null pointer assignment and subclass assignment. */ TREE_OPERAND (modify_expr, 1) = convert (lhs_type, rhs); return GS_UNHANDLED; } /* Special case handling for volatiles: we need to generate a barrier between the reading and the writing. */ static enum gimplify_status java_gimplify_self_mod_expr (tree *expr_p, gimple_seq *pre_p ATTRIBUTE_UNUSED, gimple_seq *post_p ATTRIBUTE_UNUSED) { tree lhs = TREE_OPERAND (*expr_p, 0); if (TREE_CODE (lhs) == COMPONENT_REF && TREE_THIS_VOLATILE (TREE_OPERAND (lhs, 1))) TREE_THIS_VOLATILE (lhs) = 1; return GS_UNHANDLED; } /* Gimplify BLOCK into a BIND_EXPR. */ static tree java_gimplify_block (tree java_block) { tree decls = BLOCK_VARS (java_block); tree body = BLOCK_EXPR_BODY (java_block); gimple outer = gimple_current_bind_expr (); tree block; /* Don't bother with empty blocks. */ if (! body) return build_empty_stmt (input_location); if (IS_EMPTY_STMT (body)) return body; /* Make a proper block. Java blocks are unsuitable for BIND_EXPR because they use BLOCK_SUBBLOCKS for another purpose. */ block = make_node (BLOCK); BLOCK_VARS (block) = decls; /* The TREE_USED flag on a block determines whether the debug output routines generate info for the variables in that block. */ TREE_USED (block) = 1; if (outer != NULL) { tree b = gimple_bind_block (outer); BLOCK_SUBBLOCKS (b) = chainon (BLOCK_SUBBLOCKS (b), block); } BLOCK_EXPR_BODY (java_block) = NULL_TREE; return build3 (BIND_EXPR, TREE_TYPE (java_block), decls, body, block); } /* Dump a tree of some kind. This is a convenience wrapper for the dump_* functions in tree-dump.c. */ static void dump_java_tree (enum tree_dump_index phase, tree t) { FILE *stream; int flags; stream = dump_begin (phase, &flags); flags |= TDF_SLIM; if (stream) { dump_node (t, flags, stream); dump_end (phase, stream); } }
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