Example usage for org.objectweb.asm MethodVisitor visitInsn

Introduction

In this page you can find the example usage for org.objectweb.asm MethodVisitor visitInsn.

Prototype

public void visitInsn(final int opcode) 

Source Link

Document

Visits a zero operand instruction.

Usage

From source file:com.yahoo.yqlplus.engine.internal.bytecode.types.gambit.ConstructInvocation.java

@Override
protected void generate(Location loc, CodeEmitter code, List<BytecodeExpression> args) {
    Preconditions.checkArgument(args.size() == getArgumentTypes().size(),
            "exactInvoker argument length mismatch: %s != expected %s", args.size(), getArgumentTypes().size());
    MethodVisitor mv = code.getMethodVisitor();
    List<BytecodeExpression> pre = Lists.newArrayListWithCapacity(args.size());
    CodeEmitter scope = code.createScope();
    for (BytecodeExpression arg : args) {
        pre.add(scope.evaluateOnce(arg));
    }/* www .j  a  v a 2  s.  c  o  m*/
    mv.visitTypeInsn(Opcodes.NEW, ownerInternalName);
    mv.visitInsn(Opcodes.DUP);
    for (BytecodeExpression arg : pre) {
        arg.generate(scope);
    }
    mv.visitMethodInsn(Opcodes.INVOKESPECIAL, ownerInternalName, "<init>", desc, false);
    scope.endScope();
}

---

From source file:com.yahoo.yqlplus.engine.internal.bytecode.types.gambit.ExpressionHandler.java

@Override
public BytecodeExpression coalesce(Location loc, final List<BytecodeExpression> inputs) {
    List<TypeWidget> widgets = Lists.newArrayList();
    for (BytecodeExpression expr : inputs) {
        widgets.add(expr.getType());/*from   w w w  .  j  ava2s. c  om*/
    }
    TypeWidget output = unify(widgets);
    return new BaseTypeExpression(output) {
        @Override
        public void generate(CodeEmitter code) {
            Label done = new Label();
            MethodVisitor mv = code.getMethodVisitor();
            boolean lastNullable = true;
            for (BytecodeExpression expr : inputs) {
                Label isNull = new Label();
                code.exec(expr);
                if (code.cast(getType(), expr.getType(), isNull)) {
                    mv.visitJumpInsn(Opcodes.GOTO, done);
                    mv.visitLabel(isNull);
                } else {
                    lastNullable = false;
                    break;
                }
            }
            if (lastNullable) {
                mv.visitInsn(Opcodes.ACONST_NULL);
            }
            mv.visitLabel(done);
        }
    };
}

---

From source file:com.yahoo.yqlplus.engine.internal.bytecode.types.gambit.ExpressionHandler.java

@Override
public BytecodeExpression list(Location loc, final List<BytecodeExpression> args) {
    List<TypeWidget> types = Lists.newArrayList();
    for (BytecodeExpression e : args) {
        types.add(e.getType());//from www.ja  v a2  s  .  c o  m
    }
    final TypeWidget unified = unify(types).boxed();
    final ListTypeWidget out = new ListTypeWidget(NotNullableTypeWidget.create(unified));
    return new BaseTypeExpression(out) {
        @Override
        public void generate(CodeEmitter code) {
            MethodVisitor mv = code.getMethodVisitor();
            code.exec(out.construct(constant(args.size())));
            for (BytecodeExpression expr : args) {
                Label skip = new Label();
                mv.visitInsn(Opcodes.DUP);
                code.exec(expr);
                final TypeWidget type = expr.getType();
                boolean nullable = code.cast(unified, type, skip);
                mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getInternalName(Collection.class), "add",
                        Type.getMethodDescriptor(Type.BOOLEAN_TYPE, Type.getType(Object.class)), true);
                if (nullable) {
                    // we're either going to POP the DUPed List OR the result of add
                    mv.visitLabel(skip);
                }
                mv.visitInsn(Opcodes.POP);
            }
        }
    };
}

---

From source file:com.yahoo.yqlplus.engine.internal.bytecode.types.gambit.ExpressionHandler.java

@Override
public BytecodeExpression matches(Location loc, final BytecodeExpression left, final BytecodeExpression right) {
    return new BaseTypeExpression(BaseTypeAdapter.BOOLEAN) {
        @Override/*from   w w w . jav a2  s .  c o m*/
        public void generate(CodeEmitter code) {
            Label done = new Label();
            Label anyIsNull = new Label();
            CodeEmitter.BinaryCoercion coerce = code.binaryCoercion(right, Pattern.class, left,
                    CharSequence.class, anyIsNull, anyIsNull, anyIsNull);
            MethodVisitor mv = code.getMethodVisitor();
            mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, Type.getInternalName(Pattern.class), "matcher",
                    Type.getMethodDescriptor(Type.getType(Matcher.class), Type.getType(CharSequence.class)),
                    false);
            mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, Type.getInternalName(Matcher.class), "matches",
                    Type.getMethodDescriptor(Type.BOOLEAN_TYPE), false);
            if (coerce.leftNullable || coerce.rightNullable) {
                mv.visitJumpInsn(Opcodes.GOTO, done);
                mv.visitLabel(anyIsNull);
                mv.visitInsn(Opcodes.ICONST_0);
                mv.visitLabel(done);
            }
        }
    };
}

---

From source file:com.yahoo.yqlplus.engine.internal.bytecode.types.gambit.ExpressionHandler.java

@Override
public BytecodeExpression in(Location loc, final BytecodeExpression left, final BytecodeExpression right) {
    return new BaseTypeExpression(BaseTypeAdapter.BOOLEAN) {
        @Override//from   www . jav a  2  s . c  o m
        public void generate(CodeEmitter code) {
            Label done = new Label();
            Label anyIsNull = new Label();
            CodeEmitter.BinaryCoercion coerce = code.binaryCoercion(right, Collection.class, left, Object.class,
                    anyIsNull, anyIsNull, anyIsNull);
            MethodVisitor mv = code.getMethodVisitor();
            mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getInternalName(Collection.class), "contains",
                    Type.getMethodDescriptor(Type.BOOLEAN_TYPE, Type.getType(Object.class)), true);
            if (coerce.leftNullable || coerce.rightNullable) {
                mv.visitJumpInsn(Opcodes.GOTO, done);
                mv.visitLabel(anyIsNull);
                mv.visitInsn(Opcodes.ICONST_0);
                mv.visitLabel(done);
            }
        }
    };
}

---

From source file:com.yahoo.yqlplus.engine.internal.bytecode.types.gambit.ExpressionHandler.java

@Override
public BytecodeExpression fallback(Location loc, final BytecodeExpression primary,
        final BytecodeExpression caught) {
    TypeWidget unified = unify(primary.getType(), caught.getType());
    return new BaseTypeExpression(unified) {
        @Override/*w ww  .  j a  va2s . co  m*/
        public void generate(CodeEmitter code) {
            MethodVisitor mv = code.getMethodVisitor();
            final Label start = new Label();
            final Label endCatch = new Label();
            final Label handler = new Label();
            Label done = new Label();
            // this probably should not be catching throwable and instead should be catching Exception
            // or permit certain Errors through only
            mv.visitTryCatchBlock(start, endCatch, handler, "java/lang/Throwable");
            mv.visitLabel(start);
            code.exec(primary);
            Label isNull = new Label();
            boolean maybeNull = code.cast(getType(), primary.getType(), isNull);
            mv.visitJumpInsn(Opcodes.GOTO, done);
            mv.visitLabel(endCatch);
            mv.visitLabel(handler);
            mv.visitInsn(Opcodes.POP);
            if (maybeNull) {
                mv.visitLabel(isNull);
            }
            code.exec(caught);
            code.cast(getType(), caught.getType());
            mv.visitLabel(done);
        }
    };
}

---

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));
    }/* w w  w.  j ava 2 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  .  j  a  va 2 s. c om

    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 emitStringSwitch(Map<String, Label> labels, Label defaultCase, boolean caseInsensitive) {
    MethodVisitor mv = getMethodVisitor();
    if (caseInsensitive) {
        mv.visitFieldInsn(GETSTATIC, "java/util/Locale", "ENGLISH", "Ljava/util/Locale;");
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/String", "toUpperCase",
                "(Ljava/util/Locale;)Ljava/lang/String;", false);
    }// www .j a  v  a 2  s  . c  o  m
    mv.visitInsn(DUP);
    AssignableValue tmp = allocate(String.class);
    tmp.write(BaseTypeAdapter.STRING).generate(this);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/String", "hashCode", "()I", false);
    Multimap<Integer, SwitchLabel> keys = ArrayListMultimap.create();
    for (Map.Entry<String, Label> e : labels.entrySet()) {
        String name = e.getKey();
        if (caseInsensitive) {
            name = name.toUpperCase(Locale.ENGLISH);
        }
        keys.put(name.hashCode(), new SwitchLabel(name, e.getValue()));
    }
    List<Integer> codes = Lists.newArrayList(keys.keySet());
    Collections.sort(codes);
    int[] k = new int[codes.size()];
    Label[] kl = new Label[codes.size()];
    for (int i = 0; i < k.length; ++i) {
        k[i] = codes.get(i);
        kl[i] = new Label();
    }
    mv.visitLookupSwitchInsn(defaultCase, k, kl);
    for (int i = 0; i < k.length; ++i) {
        mv.visitLabel(kl[i]);
        for (SwitchLabel switchLabel : keys.get(k[i])) {
            mv.visitLdcInsn(switchLabel.name);
            tmp.read().generate(this);
            mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/String", "equals", "(Ljava/lang/Object;)Z", false);
            mv.visitJumpInsn(IFNE, switchLabel.label);
        }
        mv.visitJumpInsn(GOTO, defaultCase);
    }
}

---

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

public void swap(TypeWidget top, TypeWidget previous) {
    MethodVisitor mv = getMethodVisitor();
    switch (top.getJVMType().getSize()) {
    case 1:/*from   ww  w.  java  2  s. co  m*/
        switch (previous.getJVMType().getSize()) {
        case 1:
            // 1, 1
            mv.visitInsn(Opcodes.SWAP);
            return;
        case 2:
            // 2, 1
            // {value3, value2}, value1  value1, {value3, value2}, value1
            mv.visitInsn(Opcodes.DUP_X2);
            // value1, {value3, value2}
            mv.visitInsn(Opcodes.POP);
            return;
        }
        break;
    case 2:
        switch (previous.getJVMType().getSize()) {
        case 1:
            // 1, 2
            // value3, {value2, value1}  {value2, value1}, value3, {value2, value1}
            mv.visitInsn(Opcodes.DUP2_X1);
            // {value2, value1}, value3
            mv.visitInsn(Opcodes.POP2);
            return;
        case 2:
            // {value4, value3}, {value2, value1}  {value2, value1}, {value4, value3}, {value2, value1}
            mv.visitInsn(Opcodes.DUP2_X2);
            // {value2, value1}, {value4, value3}
            mv.visitInsn(Opcodes.POP2);
            return;
        }
        break;
    }
    throw new UnsupportedOperationException();
}

---

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