public void createBCode(CodeGeneration gen) { super.createBCode(gen); if (hasResult()) { TypeDecl type = null; BodyDecl b = enclosingBodyDecl(); if (b instanceof MethodDecl) { type = ((MethodDecl) b).type(); } else { throw new Error("Can not create code that returns value within non method"); } getResult().createBCode(gen); getResult().type().emitCastTo(gen, type); if (!finallyList().isEmpty()) { type.emitStoreLocal(gen, resultSaveLocalNum()); } for (Iterator iter = finallyList().iterator(); iter.hasNext(); ) { FinallyHost stmt = (FinallyHost) iter.next(); gen.emitJsr(stmt.label_finally_block()); } if (!finallyList().isEmpty()) { type.emitLoadLocal(gen, resultSaveLocalNum()); } type.emitReturn(gen); } else { for (Iterator iter = finallyList().iterator(); iter.hasNext(); ) { FinallyHost stmt = (FinallyHost) iter.next(); gen.emitJsr(stmt.label_finally_block()); } gen.emitReturn(); } }
// string addition assign expression public void createBCode(CodeGeneration gen) { TypeDecl dest = getDest().type(); TypeDecl source = getSource().type(); if (dest.isString()) { getDest().createAssignLoadDest(gen); // new StringBuffer() TypeDecl stringBuffer = lookupType("java.lang", "StringBuffer"); String classname = stringBuffer.constantPoolName(); String desc; int index; TypeDecl argumentType; stringBuffer.emitNew(gen); // new StringBuffer gen.emitDup(); // dup desc = "()V"; index = gen.constantPool().addMethodref(classname, "<init>", desc); gen.emit(Bytecode.INVOKESPECIAL, -1).add2(index); // invokespecial StringBuffer() gen.emitSwap(); // append argumentType = dest.stringPromotion(); desc = "(" + argumentType.typeDescriptor() + ")" + stringBuffer.typeDescriptor(); index = gen.constantPool().addMethodref(classname, "append", desc); gen.emit(Bytecode.INVOKEVIRTUAL, -argumentType.variableSize()) .add2(index); // StringBuffer.append getSource().createBCode(gen); // typed append argumentType = source.stringPromotion(); desc = "(" + argumentType.typeDescriptor() + ")" + stringBuffer.typeDescriptor(); index = gen.constantPool().addMethodref(classname, "append", desc); gen.emit(Bytecode.INVOKEVIRTUAL, -argumentType.variableSize()) .add2(index); // StringBuffer.append // toString desc = "()" + type().typeDescriptor(); index = gen.constantPool().addMethodref(classname, "toString", desc); gen.emit(Bytecode.INVOKEVIRTUAL, 0).add2(index); // StringBuffer.toString if (needsPush()) { getDest().createPushAssignmentResult(gen); } getDest().emitStore(gen); } else { super.createBCode(gen); } }
public void createBCode(CodeGeneration gen) { super.createBCode(gen); int elseBranch = else_branch_label(); int thenBranch = then_branch_label(); int endBranch = hostType().constantPool().newLabel(); getCondition().emitEvalBranch(gen); gen.addLabel(thenBranch); // if(getCondition().canBeTrue()) { getThen().createBCode(gen); if (getThen().canCompleteNormally() && hasElse() /*&& getCondition().canBeFalse()*/) gen.emitGoto(endBranch); // } gen.addLabel(elseBranch); if (hasElse() /*&& getCondition().canBeFalse()*/) getElse().createBCode(gen); gen.addLabel(endBranch); }