Showing the changes to java/pkg/sun/tools/tree/AssignAddExpression.java (1 of 18352 files). Show all
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| 1 | +/* | |
| 2 | + * Copyright (c) 1994, 2003, Oracle and/or its affiliates. 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. Oracle designates this | |
| 8 | + * particular file as subject to the "Classpath" exception as provided | |
| 9 | + * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 | + * or visit www.oracle.com if you need additional information or have any | |
| 23 | + * 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 | +} | |