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);
}