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