Example usage for org.objectweb.asm Opcodes GOTO

Introduction

In this page you can find the example usage for org.objectweb.asm Opcodes GOTO.

Prototype

int GOTO

To view the source code for org.objectweb.asm Opcodes GOTO.

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Usage

From source file:com.yahoo.yqlplus.engine.internal.compiler.BytecodeArithmeticExpression.java

@Override
public void generate(CodeEmitter code) {
    MethodVisitor mv = code.getMethodVisitor();
    Label isNull = new Label();
    TypeWidget mathType = getType().unboxed();

    if (!mathType.isPrimitive() || op == ArithmeticOperation.POW) {
        mv.visitFieldInsn(Opcodes.GETSTATIC, Type.getInternalName(Maths.class), "INSTANCE",
                Type.getDescriptor(Maths.class));
        mv.visitFieldInsn(Opcodes.GETSTATIC, Type.getInternalName(ArithmeticOperation.class), op.name(),
                Type.getDescriptor(ArithmeticOperation.class));
    }//from  w w w  .ja  v  a2 s. c  o m

    CodeEmitter.Unification out = code.unifyAs(mathType, leftExpr, rightExpr, isNull, isNull, isNull);
    // now we have both sides unified as (if possible) a primitive type

    // compute the result
    if (mathType.isPrimitive()) {
        switch (op) {
        case ADD:
            mv.visitInsn(mathType.getJVMType().getOpcode(Opcodes.IADD));
            break;
        case SUB:
            mv.visitInsn(mathType.getJVMType().getOpcode(Opcodes.ISUB));
            break;
        case MULT:
            mv.visitInsn(mathType.getJVMType().getOpcode(Opcodes.IMUL));
            break;
        case DIV:
            mv.visitInsn(mathType.getJVMType().getOpcode(Opcodes.IDIV));
            break;
        case MOD:
            mv.visitInsn(mathType.getJVMType().getOpcode(Opcodes.IREM));
            break;
        case POW:
            mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, Type.getInternalName(Maths.class), "binaryMath",
                    Type.getMethodDescriptor(mathType.getJVMType(), Type.getType(ArithmeticOperation.class),
                            mathType.getJVMType(), mathType.getJVMType()),
                    false);
            break;
        default:
            throw new ProgramCompileException(loc, "Unknown BinaryMath operation: " + op);

        }
    } else if (mathType.getValueCoreType() == YQLCoreType.ANY) {
        String desc = Type.getMethodDescriptor(getType().getJVMType(), Type.getType(Maths.class),
                Type.getType(ArithmeticOperation.class), leftExpr.getType().boxed().getJVMType(),
                rightExpr.getType().boxed().getJVMType());
        mv.visitInvokeDynamicInsn("dyn:callMethod:binaryMath", desc, Dynamic.H_DYNALIB_BOOTSTRAP);
    } else {
        throw new ProgramCompileException(loc, "Math operation %s is not defined for type %s", op,
                mathType.getJVMType());
    }

    if (!getType().isPrimitive() && mathType.isPrimitive()) {
        code.box(mathType);
    }

    if (out.nullPossible) {
        Label done = new Label();
        mv.visitJumpInsn(Opcodes.GOTO, done);
        mv.visitLabel(isNull);
        if (!mathType.isPrimitive() || op == ArithmeticOperation.POW) {
            mv.visitInsn(Opcodes.POP2);
        }
        mv.visitInsn(Opcodes.ACONST_NULL);
        mv.visitLabel(done);
    }
}

---

From source file:com.yahoo.yqlplus.engine.internal.compiler.BytecodeNegateExpression.java

@Override
public void generate(CodeEmitter code) {
    MethodVisitor mv = code.getMethodVisitor();
    Label isNull = new Label();
    TypeWidget mathType = getType().unboxed();

    if (!mathType.isPrimitive()) {
        mv.visitFieldInsn(Opcodes.GETSTATIC, Type.getInternalName(Maths.class), "INSTANCE",
                Type.getDescriptor(Maths.class));
    }//from w  ww.jav a 2  s  .c o  m

    boolean maybeNull = code.cast(mathType, leftExpr.getType(), isNull);
    // compute the result
    if (mathType.isPrimitive()) {
        mv.visitInsn(mathType.getJVMType().getOpcode(Opcodes.INEG));
    } else if (mathType.getValueCoreType() == YQLCoreType.ANY) {
        String desc = Type.getMethodDescriptor(getType().getJVMType(), Type.getType(Maths.class),
                leftExpr.getType().getJVMType());
        mv.visitInvokeDynamicInsn("dyn:callMethod:negate", desc, Dynamic.H_DYNALIB_BOOTSTRAP);
    } else {
        throw new ProgramCompileException(loc, "Math operation NEGATE is not defined for type %s",
                mathType.getJVMType());
    }

    if (!getType().isPrimitive() && mathType.isPrimitive()) {
        code.box(mathType);
    }

    if (maybeNull) {
        Label done = new Label();
        mv.visitJumpInsn(Opcodes.GOTO, done);
        mv.visitLabel(isNull);
        mv.visitInsn(Opcodes.ACONST_NULL);
        mv.visitLabel(done);
    }
}

---

From source file:com.yahoo.yqlplus.engine.internal.compiler.CodeEmitter.java

public void gotoExitScope() {
    methodVisitor.visitJumpInsn(Opcodes.GOTO, getEnd());
}

---

From source file:com.yahoo.yqlplus.engine.internal.compiler.CodeEmitter.java

public Unification unifyAs(TypeWidget typeWidget, BytecodeExpression left, BytecodeExpression right,
        Label leftNull, Label rightNull, Label bothNull) {
    left.generate(this);
    boolean distinct = (leftNull != bothNull) && right.getType().isNullable();
    Label leftIsNull = distinct ? new Label() : leftNull;
    boolean nullpossible = cast(typeWidget, left.getType(), leftIsNull);
    if (nullpossible && distinct) {
        Label skip = new Label();
        methodVisitor.visitJumpInsn(Opcodes.GOTO, skip);
        methodVisitor.visitLabel(leftIsNull);
        right.generate(this);
        methodVisitor.visitJumpInsn(Opcodes.IFNULL, bothNull);
        methodVisitor.visitJumpInsn(Opcodes.GOTO, leftNull);
        methodVisitor.visitLabel(skip);/*from  w  ww.  j ava2s .c  o m*/
    }
    Label pop = new Label();
    right.generate(this);
    if (cast(typeWidget, right.getType(), pop)) {
        Label done = new Label();
        nullpossible = true;
        methodVisitor.visitJumpInsn(Opcodes.GOTO, done);
        methodVisitor.visitLabel(pop);
        // pop the left-value
        pop(typeWidget);
        methodVisitor.visitJumpInsn(Opcodes.GOTO, rightNull);
        methodVisitor.visitLabel(done);
    }
    return new Unification(typeWidget, nullpossible);
}

---

From source file:com.yahoo.yqlplus.engine.internal.compiler.CodeEmitter.java

public BinaryCoercion binaryCoercion(BytecodeExpression left, Class<?> leftClazz, BytecodeExpression right,
        Class<?> rightClazz, Label leftNull, Label rightNull, Label bothNull) {
    TypeWidget leftTarget = adapt(leftClazz);
    TypeWidget rightTarget = adapt(rightClazz);
    left.generate(this);
    boolean distinct = (leftNull != bothNull) && right.getType().isNullable();
    Label leftIsNull = distinct ? new Label() : leftNull;
    boolean leftMaybeNull = cast(leftTarget, left.getType(), leftIsNull);
    if (leftMaybeNull && distinct) {
        Label skip = new Label();
        methodVisitor.visitJumpInsn(Opcodes.GOTO, skip);
        methodVisitor.visitLabel(leftIsNull);
        right.generate(this);
        methodVisitor.visitJumpInsn(Opcodes.IFNULL, bothNull);
        methodVisitor.visitJumpInsn(Opcodes.GOTO, leftNull);
        methodVisitor.visitLabel(skip);/*from  w w w. j av  a2  s  . co m*/
    }
    Label pop = new Label();
    right.generate(this);
    boolean rightMaybeNull = false;
    if (cast(rightTarget, right.getType(), pop)) {
        Label done = new Label();
        rightMaybeNull = true;
        methodVisitor.visitJumpInsn(Opcodes.GOTO, done);
        methodVisitor.visitLabel(pop);
        // pop the left-value
        pop(leftTarget);
        methodVisitor.visitJumpInsn(Opcodes.GOTO, rightNull);
        methodVisitor.visitLabel(done);
    }
    return new BinaryCoercion(leftMaybeNull, rightMaybeNull);
}

---

From source file:com.yahoo.yqlplus.engine.internal.compiler.CodeEmitter.java

public boolean nullTest(TypeWidget typeWidget, Label isNull) {
    if (typeWidget.isNullable()) {
        Label done = new Label();
        dup(typeWidget);//from ww w .  j  av a 2  s  . c om
        getMethodVisitor().visitJumpInsn(Opcodes.IFNONNULL, done);
        pop(typeWidget);
        getMethodVisitor().visitJumpInsn(Opcodes.GOTO, isNull);
        getMethodVisitor().visitLabel(done);
        return true;
    }
    return false;
}

---

From source file:com.yahoo.yqlplus.engine.internal.compiler.CodeEmitter.java

public boolean nullTestLeaveNull(TypeWidget typeWidget, Label isNull) {
    if (typeWidget.isNullable()) {
        Label done = new Label();
        dup(typeWidget);//w  ww. j a v  a  2 s .c o m
        getMethodVisitor().visitJumpInsn(Opcodes.IFNONNULL, done);
        getMethodVisitor().visitJumpInsn(Opcodes.GOTO, isNull);
        getMethodVisitor().visitLabel(done);
        return true;
    }
    return false;
}

---

From source file:com.yahoo.yqlplus.engine.internal.compiler.CodeEmitter.java

public void notNullTest(TypeWidget typeWidget, Label isNotNull) {
    if (typeWidget.isNullable()) {
        dup(typeWidget);//w  w  w.java  2  s .c  o  m
        getMethodVisitor().visitJumpInsn(Opcodes.IFNONNULL, isNotNull);
        pop(typeWidget);
    } else {
        getMethodVisitor().visitJumpInsn(Opcodes.GOTO, isNotNull);
    }

}

---

From source file:com.yahoo.yqlplus.engine.internal.compiler.CodeEmitter.java

public void emitInstanceCheck(TypeWidget targetType, Class<?> clazz, Label isNotInstance) {
    Label is = new Label();
    Label not = new Label();
    nullTest(targetType, isNotInstance);
    emitInstanceOf(targetType, clazz, not);
    getMethodVisitor().visitJumpInsn(Opcodes.GOTO, is);
    getMethodVisitor().visitLabel(not);/*from   w ww .  j  a va 2s . c  o m*/
    pop(targetType);
    getMethodVisitor().visitJumpInsn(Opcodes.GOTO, isNotInstance);
    getMethodVisitor().visitLabel(is);
}

---

From source file:com.yahoo.yqlplus.engine.internal.compiler.CompareExpression.java

@Override
public void generate(CodeEmitter code) {
    // a bit of a hack; should not need to go to dynamic invocation for this unless one arg is ANY
    Label done = new Label();
    MethodVisitor mv = code.getMethodVisitor();
    Label leftNull = new Label();
    Label rightNull = new Label();
    Label bothNull = new Label();
    CodeEmitter.Unification unified = code.unifiedEmit(leftExpr, rightExpr, leftNull, rightNull, bothNull);
    if (unified.type.isPrimitive()) {
        emitPrimitiveCompare(code, unified.type);
    } else {/*from ww  w . ja v a 2s.c  o m*/
        // TODO: statically determine if the unified type is Comparable -- for now treat them all like "any"
        CodeEmitter scope = code.createScope();
        MethodVisitor mv2 = scope.getMethodVisitor();
        AssignableValue right = scope.allocate(unified.type);
        AssignableValue left = scope.allocate(unified.type);
        scope.exec(right.write(unified.type));
        scope.exec(left.write(unified.type));
        scope.exec(left.read());
        Label leftIsNotComparable = new Label();
        scope.emitInstanceCheck(unified.type, Comparable.class, leftIsNotComparable);
        scope.exec(right.read());
        mv2.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getInternalName(Comparable.class), "compareTo",
                Type.getMethodDescriptor(Type.INT_TYPE, Type.getType(Object.class)), true);
        scope.gotoExitScope();
        mv2.visitLabel(leftIsNotComparable);
        scope.exec(scope.getLocal("$program").read());
        scope.exec(left.read());
        scope.emitIntConstant((loc != null) ? loc.getLineNumber() : -1);
        scope.emitIntConstant((loc != null) ? loc.getCharacterOffset() : 0);
        mv2.visitMethodInsn(Opcodes.INVOKEVIRTUAL, Type.getInternalName(ProgramInvocation.class),
                "notComparable", Type.getMethodDescriptor(Type.VOID_TYPE, Type.getType(Object.class),
                        Type.INT_TYPE, Type.INT_TYPE),
                false);
        // this bit is not reachable, notComparable throws
        mv2.visitInsn(Opcodes.ICONST_0);
        mv2.visitJumpInsn(Opcodes.GOTO, done);
        scope.endScope();
    }
    if (unified.nullPossible) {
        mv.visitJumpInsn(Opcodes.GOTO, done);
        mv.visitLabel(leftNull);
        mv.visitInsn(Opcodes.ICONST_M1);
        mv.visitJumpInsn(Opcodes.GOTO, done);
        mv.visitLabel(rightNull);
        mv.visitInsn(Opcodes.ICONST_1);
        mv.visitJumpInsn(Opcodes.GOTO, done);
        mv.visitLabel(bothNull);
        mv.visitInsn(Opcodes.ICONST_0);
    }
    mv.visitLabel(done);
}

---

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