J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1994-2003 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package sun.tools.tree; |
| 27 | |
| 28 | import sun.tools.java.*; |
| 29 | import sun.tools.asm.Assembler; |
| 30 | |
| 31 | /** |
| 32 | * WARNING: The contents of this source file are not part of any |
| 33 | * supported API. Code that depends on them does so at its own risk: |
| 34 | * they are subject to change or removal without notice. |
| 35 | */ |
| 36 | public |
| 37 | class AssignAddExpression extends AssignOpExpression { |
| 38 | /** |
| 39 | * Constructor |
| 40 | */ |
| 41 | public AssignAddExpression(long where, Expression left, Expression right) { |
| 42 | super(ASGADD, where, left, right); |
| 43 | } |
| 44 | |
| 45 | |
| 46 | /** |
| 47 | * The cost of inlining this statement |
| 48 | */ |
| 49 | public int costInline(int thresh, Environment env, Context ctx) { |
| 50 | return type.isType(TC_CLASS) ? 25 : super.costInline(thresh, env, ctx); |
| 51 | } |
| 52 | |
| 53 | /** |
| 54 | * Code |
| 55 | */ |
| 56 | void code(Environment env, Context ctx, Assembler asm, boolean valNeeded) { |
| 57 | if (itype.isType(TC_CLASS)) { |
| 58 | // Create code for String += <value> |
| 59 | try { |
| 60 | // Create new string buffer. |
| 61 | Type argTypes[] = {Type.tString}; |
| 62 | ClassDeclaration c = |
| 63 | env.getClassDeclaration(idJavaLangStringBuffer); |
| 64 | |
| 65 | if (updater == null) { |
| 66 | |
| 67 | // No access method is needed. |
| 68 | |
| 69 | asm.add(where, opc_new, c); |
| 70 | asm.add(where, opc_dup); |
| 71 | // stack: ...<buffer><buffer> |
| 72 | int depth = left.codeLValue(env, ctx, asm); |
| 73 | codeDup(env, ctx, asm, depth, 2); // copy past 2 string buffers |
| 74 | // stack: ...[<getter args>]<buffer><buffer>[<getter args>] |
| 75 | // where <buffer> isn't yet initialized, and the <getter args> |
| 76 | // has length depth and is whatever is needed to get/set the |
| 77 | // value |
| 78 | left.codeLoad(env, ctx, asm); |
| 79 | left.ensureString(env, ctx, asm); // Why is this needed? |
| 80 | // stack: ...[<getter args>]<buffer><buffer><string> |
| 81 | // call .<init>(String) |
| 82 | ClassDefinition sourceClass = ctx.field.getClassDefinition(); |
| 83 | MemberDefinition f = c.getClassDefinition(env) |
| 84 | .matchMethod(env, sourceClass, |
| 85 | idInit, argTypes); |
| 86 | asm.add(where, opc_invokespecial, f); |
| 87 | // stack: ...[<getter args>]<initialized buffer> |
| 88 | // .append(value).toString() |
| 89 | right.codeAppend(env, ctx, asm, c, false); |
| 90 | f = c.getClassDefinition(env) |
| 91 | .matchMethod(env, sourceClass, idToString); |
| 92 | asm.add(where, opc_invokevirtual, f); |
| 93 | // stack: ...[<getter args>]<string> |
| 94 | // dup the string past the <getter args>, if necessary. |
| 95 | if (valNeeded) { |
| 96 | codeDup(env, ctx, asm, Type.tString.stackSize(), depth); |
| 97 | // stack: ...<string>[<getter args>]<string> |
| 98 | } |
| 99 | // store |
| 100 | left.codeStore(env, ctx, asm); |
| 101 | |
| 102 | } else { |
| 103 | |
| 104 | // Access method is required. |
| 105 | // (Handling this case fixes 4102566.) |
| 106 | |
| 107 | updater.startUpdate(env, ctx, asm, false); |
| 108 | // stack: ...[<getter args>]<string> |
| 109 | left.ensureString(env, ctx, asm); // Why is this needed? |
| 110 | asm.add(where, opc_new, c); |
| 111 | // stack: ...[<getter args>]<string><buffer> |
| 112 | asm.add(where, opc_dup_x1); |
| 113 | // stack: ...[<getter args>]<buffer><string><buffer> |
| 114 | asm.add(where, opc_swap); |
| 115 | // stack: ...[<getter args>]<buffer><buffer><string> |
| 116 | // call .<init>(String) |
| 117 | ClassDefinition sourceClass = ctx.field.getClassDefinition(); |
| 118 | MemberDefinition f = c.getClassDefinition(env) |
| 119 | .matchMethod(env, sourceClass, |
| 120 | idInit, argTypes); |
| 121 | asm.add(where, opc_invokespecial, f); |
| 122 | // stack: ...[<getter args>]<initialized buffer> |
| 123 | // .append(value).toString() |
| 124 | right.codeAppend(env, ctx, asm, c, false); |
| 125 | f = c.getClassDefinition(env) |
| 126 | .matchMethod(env, sourceClass, idToString); |
| 127 | asm.add(where, opc_invokevirtual, f); |
| 128 | // stack: .. [<getter args>]<string> |
| 129 | updater.finishUpdate(env, ctx, asm, valNeeded); |
| 130 | |
| 131 | } |
| 132 | |
| 133 | } catch (ClassNotFound e) { |
| 134 | throw new CompilerError(e); |
| 135 | } catch (AmbiguousMember e) { |
| 136 | throw new CompilerError(e); |
| 137 | } |
| 138 | } else { |
| 139 | super.code(env, ctx, asm, valNeeded); |
| 140 | } |
| 141 | } |
| 142 | |
| 143 | /** |
| 144 | * Code |
| 145 | */ |
| 146 | void codeOperation(Environment env, Context ctx, Assembler asm) { |
| 147 | asm.add(where, opc_iadd + itype.getTypeCodeOffset()); |
| 148 | } |
| 149 | } |