0N/A/*
2362N/A * Copyright (c) 1994, 2003, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
2362N/A * published by the Free Software Foundation. Oracle designates this
0N/A * particular file as subject to the "Classpath" exception as provided
2362N/A * by Oracle in the LICENSE file that accompanied this code.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2362N/A * or visit www.oracle.com if you need additional information or have any
2362N/A * questions.
0N/A */
0N/A
0N/Apackage sun.tools.tree;
0N/A
0N/Aimport sun.tools.java.*;
0N/Aimport sun.tools.asm.Assembler;
0N/Aimport sun.tools.asm.Label;
0N/Aimport java.io.PrintStream;
0N/Aimport java.util.Hashtable;
0N/A
0N/A/**
0N/A * WARNING: The contents of this source file are not part of any
0N/A * supported API. Code that depends on them does so at its own risk:
0N/A * they are subject to change or removal without notice.
0N/A */
0N/Apublic
0N/Aclass DoStatement extends Statement {
0N/A Statement body;
0N/A Expression cond;
0N/A
0N/A /**
0N/A * Constructor
0N/A */
0N/A public DoStatement(long where, Statement body, Expression cond) {
0N/A super(DO, where);
0N/A this.body = body;
0N/A this.cond = cond;
0N/A }
0N/A
0N/A /**
0N/A * Check statement
0N/A */
0N/A Vset check(Environment env, Context ctx, Vset vset, Hashtable exp) {
0N/A checkLabel(env,ctx);
0N/A CheckContext newctx = new CheckContext(ctx, this);
0N/A // remember what was unassigned on entry
0N/A Vset vsEntry = vset.copy();
0N/A vset = body.check(env, newctx, reach(env, vset), exp);
0N/A vset = vset.join(newctx.vsContinue);
0N/A // get to the test either by falling through the body, or through
0N/A // a "continue" statement.
0N/A ConditionVars cvars =
0N/A cond.checkCondition(env, newctx, vset, exp);
0N/A cond = convert(env, newctx, Type.tBoolean, cond);
0N/A // make sure the back-branch fits the entry of the loop
0N/A ctx.checkBackBranch(env, this, vsEntry, cvars.vsTrue);
0N/A // exit the loop through the test returning false, or a "break"
0N/A vset = newctx.vsBreak.join(cvars.vsFalse);
0N/A return ctx.removeAdditionalVars(vset);
0N/A }
0N/A
0N/A /**
0N/A * Inline
0N/A */
0N/A public Statement inline(Environment env, Context ctx) {
0N/A ctx = new Context(ctx, this);
0N/A if (body != null) {
0N/A body = body.inline(env, ctx);
0N/A }
0N/A cond = cond.inlineValue(env, ctx);
0N/A return this;
0N/A }
0N/A
0N/A /**
0N/A * Create a copy of the statement for method inlining
0N/A */
0N/A public Statement copyInline(Context ctx, boolean valNeeded) {
0N/A DoStatement s = (DoStatement)clone();
0N/A s.cond = cond.copyInline(ctx);
0N/A if (body != null) {
0N/A s.body = body.copyInline(ctx, valNeeded);
0N/A }
0N/A return s;
0N/A }
0N/A
0N/A /**
0N/A * The cost of inlining this statement
0N/A */
0N/A public int costInline(int thresh, Environment env, Context ctx) {
0N/A return 1 + cond.costInline(thresh, env, ctx)
0N/A + ((body != null) ? body.costInline(thresh, env, ctx) : 0);
0N/A }
0N/A
0N/A /**
0N/A * Code
0N/A */
0N/A public void code(Environment env, Context ctx, Assembler asm) {
0N/A Label l1 = new Label();
0N/A asm.add(l1);
0N/A
0N/A CodeContext newctx = new CodeContext(ctx, this);
0N/A
0N/A if (body != null) {
0N/A body.code(env, newctx, asm);
0N/A }
0N/A asm.add(newctx.contLabel);
0N/A cond.codeBranch(env, newctx, asm, l1, true);
0N/A asm.add(newctx.breakLabel);
0N/A }
0N/A
0N/A /**
0N/A * Print
0N/A */
0N/A public void print(PrintStream out, int indent) {
0N/A super.print(out, indent);
0N/A out.print("do ");
0N/A body.print(out, indent);
0N/A out.print(" while ");
0N/A cond.print(out);
0N/A out.print(";");
0N/A }
0N/A}