| /* |
| * Copyright (c) 1994, 2003, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.tools.tree; |
| |
| import sun.tools.java.*; |
| import sun.tools.asm.Assembler; |
| import sun.tools.asm.Label; |
| import java.io.PrintStream; |
| import java.util.Hashtable; |
| |
| /** |
| * WARNING: The contents of this source file are not part of any |
| * supported API. Code that depends on them does so at its own risk: |
| * they are subject to change or removal without notice. |
| */ |
| public |
| class CompoundStatement extends Statement { |
| Statement args[]; |
| |
| /** |
| * Constructor |
| */ |
| public CompoundStatement(long where, Statement args[]) { |
| super(STAT, where); |
| this.args = args; |
| // To avoid the need for subsequent null checks: |
| for (int i = 0 ; i < args.length ; i++) { |
| if (args[i] == null) { |
| args[i] = new CompoundStatement(where, new Statement[0]); |
| } |
| } |
| } |
| |
| /** |
| * Insert a new statement at the front. |
| * This is used to introduce an implicit super-class constructor call. |
| */ |
| public void insertStatement(Statement s) { |
| Statement newargs[] = new Statement[1+args.length]; |
| newargs[0] = s; |
| for (int i = 0 ; i < args.length ; i++) { |
| newargs[i+1] = args[i]; |
| } |
| this.args = newargs; |
| } |
| |
| /** |
| * Check statement |
| */ |
| Vset check(Environment env, Context ctx, Vset vset, Hashtable<Object, Object> exp) { |
| checkLabel(env, ctx); |
| if (args.length > 0) { |
| vset = reach(env, vset); |
| CheckContext newctx = new CheckContext(ctx, this); |
| // In this environment, 'resolveName' will look for local classes. |
| Environment newenv = Context.newEnvironment(env, newctx); |
| for (int i = 0 ; i < args.length ; i++) { |
| vset = args[i].checkBlockStatement(newenv, newctx, vset, exp); |
| } |
| vset = vset.join(newctx.vsBreak); |
| } |
| return ctx.removeAdditionalVars(vset); |
| } |
| |
| /** |
| * Inline |
| */ |
| public Statement inline(Environment env, Context ctx) { |
| ctx = new Context(ctx, this); |
| boolean expand = false; |
| int count = 0; |
| for (int i = 0 ; i < args.length ; i++) { |
| Statement s = args[i]; |
| if (s != null) { |
| if ((s = s.inline(env, ctx)) != null) { |
| if ((s.op == STAT) && (s.labels == null)) { |
| count += ((CompoundStatement)s).args.length; |
| } else { |
| count++; |
| } |
| expand = true; |
| } |
| args[i] = s; |
| } |
| } |
| switch (count) { |
| case 0: |
| return null; |
| |
| case 1: |
| for (int i = args.length ; i-- > 0 ;) { |
| if (args[i] != null) { |
| return eliminate(env, args[i]); |
| } |
| } |
| break; |
| } |
| if (expand || (count != args.length)) { |
| Statement newArgs[] = new Statement[count]; |
| for (int i = args.length ; i-- > 0 ;) { |
| Statement s = args[i]; |
| if (s != null) { |
| if ((s.op == STAT) && (s.labels == null)) { |
| Statement a[] = ((CompoundStatement)s).args; |
| for (int j = a.length ; j-- > 0 ; ) { |
| newArgs[--count] = a[j]; |
| } |
| } else { |
| newArgs[--count] = s; |
| } |
| } |
| } |
| args = newArgs; |
| } |
| return this; |
| } |
| |
| /** |
| * Create a copy of the statement for method inlining |
| */ |
| public Statement copyInline(Context ctx, boolean valNeeded) { |
| CompoundStatement s = (CompoundStatement)clone(); |
| s.args = new Statement[args.length]; |
| for (int i = 0 ; i < args.length ; i++) { |
| s.args[i] = args[i].copyInline(ctx, valNeeded); |
| } |
| return s; |
| } |
| |
| /** |
| * The cost of inlining this statement |
| */ |
| public int costInline(int thresh, Environment env, Context ctx) { |
| int cost = 0; |
| for (int i = 0 ; (i < args.length) && (cost < thresh) ; i++) { |
| cost += args[i].costInline(thresh, env, ctx); |
| } |
| return cost; |
| } |
| |
| /** |
| * Code |
| */ |
| public void code(Environment env, Context ctx, Assembler asm) { |
| CodeContext newctx = new CodeContext(ctx, this); |
| for (int i = 0 ; i < args.length ; i++) { |
| args[i].code(env, newctx, asm); |
| } |
| asm.add(newctx.breakLabel); |
| } |
| |
| /** |
| * Check if the first thing is a constructor invocation |
| */ |
| public Expression firstConstructor() { |
| return (args.length > 0) ? args[0].firstConstructor() : null; |
| } |
| |
| /** |
| * Print |
| */ |
| public void print(PrintStream out, int indent) { |
| super.print(out, indent); |
| out.print("{\n"); |
| for (int i = 0 ; i < args.length ; i++) { |
| printIndent(out, indent+1); |
| if (args[i] != null) { |
| args[i].print(out, indent + 1); |
| } else { |
| out.print("<empty>"); |
| } |
| out.print("\n"); |
| } |
| printIndent(out, indent); |
| out.print("}"); |
| } |
| } |