diff -r 000000000000 -r c880a8a8803b rt/emul/compact/src/main/java/java/lang/invoke/InvokerBytecodeGenerator.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rt/emul/compact/src/main/java/java/lang/invoke/InvokerBytecodeGenerator.java	Sat Aug 09 11:11:13 2014 +0200
@@ -0,0 +1,1052 @@
+/*
+ * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package java.lang.invoke;
+
+import sun.invoke.util.VerifyAccess;
+import java.lang.invoke.LambdaForm.Name;
+import java.lang.invoke.MethodHandles.Lookup;
+
+import sun.invoke.util.Wrapper;
+
+import java.io.*;
+import java.util.*;
+
+import jdk.internal.org.objectweb.asm.*;
+
+import java.lang.reflect.*;
+import static java.lang.invoke.MethodHandleStatics.*;
+import static java.lang.invoke.MethodHandleNatives.Constants.*;
+import static java.lang.invoke.MethodHandles.Lookup.IMPL_LOOKUP;
+import sun.invoke.util.ValueConversions;
+import sun.invoke.util.VerifyType;
+
+/**
+ * Code generation backend for LambdaForm.
+ * <p>
+ * @author John Rose, JSR 292 EG
+ */
+class InvokerBytecodeGenerator {
+    /** Define class names for convenience. */
+    private static final String MH      = "java/lang/invoke/MethodHandle";
+    private static final String BMH     = "java/lang/invoke/BoundMethodHandle";
+    private static final String LF      = "java/lang/invoke/LambdaForm";
+    private static final String LFN     = "java/lang/invoke/LambdaForm$Name";
+    private static final String CLS     = "java/lang/Class";
+    private static final String OBJ     = "java/lang/Object";
+    private static final String OBJARY  = "[Ljava/lang/Object;";
+
+    private static final String LF_SIG  = "L" + LF + ";";
+    private static final String LFN_SIG = "L" + LFN + ";";
+    private static final String LL_SIG  = "(L" + OBJ + ";)L" + OBJ + ";";
+
+    /** Name of its super class*/
+    private static final String superName = LF;
+
+    /** Name of new class */
+    private final String className;
+
+    /** Name of the source file (for stack trace printing). */
+    private final String sourceFile;
+
+    private final LambdaForm lambdaForm;
+    private final String     invokerName;
+    private final MethodType invokerType;
+    private final int[] localsMap;
+
+    /** ASM bytecode generation. */
+    private ClassWriter cw;
+    private MethodVisitor mv;
+
+    private static final MemberName.Factory MEMBERNAME_FACTORY = MemberName.getFactory();
+    private static final Class<?> HOST_CLASS = LambdaForm.class;
+
+    private InvokerBytecodeGenerator(LambdaForm lambdaForm, int localsMapSize,
+                                     String className, String invokerName, MethodType invokerType) {
+        if (invokerName.contains(".")) {
+            int p = invokerName.indexOf(".");
+            className = invokerName.substring(0, p);
+            invokerName = invokerName.substring(p+1);
+        }
+        if (DUMP_CLASS_FILES) {
+            className = makeDumpableClassName(className);
+        }
+        this.className  = superName + "$" + className;
+        this.sourceFile = "LambdaForm$" + className;
+        this.lambdaForm = lambdaForm;
+        this.invokerName = invokerName;
+        this.invokerType = invokerType;
+        this.localsMap = new int[localsMapSize];
+    }
+
+    private InvokerBytecodeGenerator(String className, String invokerName, MethodType invokerType) {
+        this(null, invokerType.parameterCount(),
+             className, invokerName, invokerType);
+        // Create an array to map name indexes to locals indexes.
+        for (int i = 0; i < localsMap.length; i++) {
+            localsMap[i] = invokerType.parameterSlotCount() - invokerType.parameterSlotDepth(i);
+        }
+    }
+
+    private InvokerBytecodeGenerator(String className, LambdaForm form, MethodType invokerType) {
+        this(form, form.names.length,
+             className, form.debugName, invokerType);
+        // Create an array to map name indexes to locals indexes.
+        Name[] names = form.names;
+        for (int i = 0, index = 0; i < localsMap.length; i++) {
+            localsMap[i] = index;
+            index += Wrapper.forBasicType(names[i].type).stackSlots();
+        }
+    }
+
+
+    /** instance counters for dumped classes */
+    private final static HashMap<String,Integer> DUMP_CLASS_FILES_COUNTERS;
+    /** debugging flag for saving generated class files */
+    private final static File DUMP_CLASS_FILES_DIR;
+
+    static {
+        if (DUMP_CLASS_FILES) {
+            DUMP_CLASS_FILES_COUNTERS = new HashMap<>();
+            try {
+                File dumpDir = new File("DUMP_CLASS_FILES");
+                if (!dumpDir.exists()) {
+                    dumpDir.mkdirs();
+                }
+                DUMP_CLASS_FILES_DIR = dumpDir;
+                System.out.println("Dumping class files to "+DUMP_CLASS_FILES_DIR+"/...");
+            } catch (Exception e) {
+                throw newInternalError(e);
+            }
+        } else {
+            DUMP_CLASS_FILES_COUNTERS = null;
+            DUMP_CLASS_FILES_DIR = null;
+        }
+    }
+
+    static void maybeDump(final String className, final byte[] classFile) {
+        if (DUMP_CLASS_FILES) {
+            System.out.println("dump: " + className);
+            java.security.AccessController.doPrivileged(
+            new java.security.PrivilegedAction<Void>() {
+                public Void run() {
+                    try {
+                        String dumpName = className;
+                        //dumpName = dumpName.replace('/', '-');
+                        File dumpFile = new File(DUMP_CLASS_FILES_DIR, dumpName+".class");
+                        dumpFile.getParentFile().mkdirs();
+                        FileOutputStream file = new FileOutputStream(dumpFile);
+                        file.write(classFile);
+                        file.close();
+                        return null;
+                    } catch (IOException ex) {
+                        throw newInternalError(ex);
+                    }
+                }
+            });
+        }
+
+    }
+
+    private static String makeDumpableClassName(String className) {
+        Integer ctr;
+        synchronized (DUMP_CLASS_FILES_COUNTERS) {
+            ctr = DUMP_CLASS_FILES_COUNTERS.get(className);
+            if (ctr == null)  ctr = 0;
+            DUMP_CLASS_FILES_COUNTERS.put(className, ctr+1);
+        }
+        String sfx = ctr.toString();
+        while (sfx.length() < 3)
+            sfx = "0"+sfx;
+        className += sfx;
+        return className;
+    }
+
+    class CpPatch {
+        final int index;
+        final String placeholder;
+        final Object value;
+        CpPatch(int index, String placeholder, Object value) {
+            this.index = index;
+            this.placeholder = placeholder;
+            this.value = value;
+        }
+        public String toString() {
+            return "CpPatch/index="+index+",placeholder="+placeholder+",value="+value;
+        }
+    }
+
+    Map<Object, CpPatch> cpPatches = new HashMap<>();
+
+    int cph = 0;  // for counting constant placeholders
+
+    String constantPlaceholder(Object arg) {
+        String cpPlaceholder = "CONSTANT_PLACEHOLDER_" + cph++;
+        if (DUMP_CLASS_FILES) cpPlaceholder += " <<" + arg.toString() + ">>";  // debugging aid
+        if (cpPatches.containsKey(cpPlaceholder)) {
+            throw new InternalError("observed CP placeholder twice: " + cpPlaceholder);
+        }
+        // insert placeholder in CP and remember the patch
+        int index = cw.newConst((Object) cpPlaceholder);  // TODO check if aready in the constant pool
+        cpPatches.put(cpPlaceholder, new CpPatch(index, cpPlaceholder, arg));
+        return cpPlaceholder;
+    }
+
+    Object[] cpPatches(byte[] classFile) {
+        int size = getConstantPoolSize(classFile);
+        Object[] res = new Object[size];
+        for (CpPatch p : cpPatches.values()) {
+            if (p.index >= size)
+                throw new InternalError("in cpool["+size+"]: "+p+"\n"+Arrays.toString(Arrays.copyOf(classFile, 20)));
+            res[p.index] = p.value;
+        }
+        return res;
+    }
+
+    /**
+     * Extract the number of constant pool entries from a given class file.
+     *
+     * @param classFile the bytes of the class file in question.
+     * @return the number of entries in the constant pool.
+     */
+    private static int getConstantPoolSize(byte[] classFile) {
+        // The first few bytes:
+        // u4 magic;
+        // u2 minor_version;
+        // u2 major_version;
+        // u2 constant_pool_count;
+        return ((classFile[8] & 0xFF) << 8) | (classFile[9] & 0xFF);
+    }
+
+    /**
+     * Extract the MemberName of a newly-defined method.
+     */
+    private MemberName loadMethod(byte[] classFile) {
+        Class<?> invokerClass = loadAndInitializeInvokerClass(classFile, cpPatches(classFile));
+        return resolveInvokerMember(invokerClass, invokerName, invokerType);
+    }
+
+    /**
+     * Define a given class as anonymous class in the runtime system.
+     */
+    private static Class<?> loadAndInitializeInvokerClass(byte[] classBytes, Object[] patches) {
+        Class<?> invokerClass = UNSAFE.defineAnonymousClass(HOST_CLASS, classBytes, patches);
+        UNSAFE.ensureClassInitialized(invokerClass);  // Make sure the class is initialized; VM might complain.
+        return invokerClass;
+    }
+
+    private static MemberName resolveInvokerMember(Class<?> invokerClass, String name, MethodType type) {
+        MemberName member = new MemberName(invokerClass, name, type, REF_invokeStatic);
+        //System.out.println("resolveInvokerMember => "+member);
+        //for (Method m : invokerClass.getDeclaredMethods())  System.out.println("  "+m);
+        try {
+            member = MEMBERNAME_FACTORY.resolveOrFail(REF_invokeStatic, member, HOST_CLASS, ReflectiveOperationException.class);
+        } catch (ReflectiveOperationException e) {
+            throw newInternalError(e);
+        }
+        //System.out.println("resolveInvokerMember => "+member);
+        return member;
+    }
+
+    /**
+     * Set up class file generation.
+     */
+    private void classFilePrologue() {
+        cw = new ClassWriter(ClassWriter.COMPUTE_MAXS + ClassWriter.COMPUTE_FRAMES);
+        cw.visit(Opcodes.V1_8, Opcodes.ACC_PUBLIC + Opcodes.ACC_FINAL + Opcodes.ACC_SUPER, className, null, superName, null);
+        cw.visitSource(sourceFile, null);
+
+        String invokerDesc = invokerType.toMethodDescriptorString();
+        mv = cw.visitMethod(Opcodes.ACC_STATIC, invokerName, invokerDesc, null, null);
+    }
+
+    /**
+     * Tear down class file generation.
+     */
+    private void classFileEpilogue() {
+        mv.visitMaxs(0, 0);
+        mv.visitEnd();
+    }
+
+    /*
+     * Low-level emit helpers.
+     */
+    private void emitConst(Object con) {
+        if (con == null) {
+            mv.visitInsn(Opcodes.ACONST_NULL);
+            return;
+        }
+        if (con instanceof Integer) {
+            emitIconstInsn((int) con);
+            return;
+        }
+        if (con instanceof Long) {
+            long x = (long) con;
+            if (x == (short) x) {
+                emitIconstInsn((int) x);
+                mv.visitInsn(Opcodes.I2L);
+                return;
+            }
+        }
+        if (con instanceof Float) {
+            float x = (float) con;
+            if (x == (short) x) {
+                emitIconstInsn((int) x);
+                mv.visitInsn(Opcodes.I2F);
+                return;
+            }
+        }
+        if (con instanceof Double) {
+            double x = (double) con;
+            if (x == (short) x) {
+                emitIconstInsn((int) x);
+                mv.visitInsn(Opcodes.I2D);
+                return;
+            }
+        }
+        if (con instanceof Boolean) {
+            emitIconstInsn((boolean) con ? 1 : 0);
+            return;
+        }
+        // fall through:
+        mv.visitLdcInsn(con);
+    }
+
+    private void emitIconstInsn(int i) {
+        int opcode;
+        switch (i) {
+        case 0:  opcode = Opcodes.ICONST_0;  break;
+        case 1:  opcode = Opcodes.ICONST_1;  break;
+        case 2:  opcode = Opcodes.ICONST_2;  break;
+        case 3:  opcode = Opcodes.ICONST_3;  break;
+        case 4:  opcode = Opcodes.ICONST_4;  break;
+        case 5:  opcode = Opcodes.ICONST_5;  break;
+        default:
+            if (i == (byte) i) {
+                mv.visitIntInsn(Opcodes.BIPUSH, i & 0xFF);
+            } else if (i == (short) i) {
+                mv.visitIntInsn(Opcodes.SIPUSH, (char) i);
+            } else {
+                mv.visitLdcInsn(i);
+            }
+            return;
+        }
+        mv.visitInsn(opcode);
+    }
+
+    /*
+     * NOTE: These load/store methods use the localsMap to find the correct index!
+     */
+    private void emitLoadInsn(char type, int index) {
+        int opcode;
+        switch (type) {
+        case 'I':  opcode = Opcodes.ILOAD;  break;
+        case 'J':  opcode = Opcodes.LLOAD;  break;
+        case 'F':  opcode = Opcodes.FLOAD;  break;
+        case 'D':  opcode = Opcodes.DLOAD;  break;
+        case 'L':  opcode = Opcodes.ALOAD;  break;
+        default:
+            throw new InternalError("unknown type: " + type);
+        }
+        mv.visitVarInsn(opcode, localsMap[index]);
+    }
+    private void emitAloadInsn(int index) {
+        emitLoadInsn('L', index);
+    }
+
+    private void emitStoreInsn(char type, int index) {
+        int opcode;
+        switch (type) {
+        case 'I':  opcode = Opcodes.ISTORE;  break;
+        case 'J':  opcode = Opcodes.LSTORE;  break;
+        case 'F':  opcode = Opcodes.FSTORE;  break;
+        case 'D':  opcode = Opcodes.DSTORE;  break;
+        case 'L':  opcode = Opcodes.ASTORE;  break;
+        default:
+            throw new InternalError("unknown type: " + type);
+        }
+        mv.visitVarInsn(opcode, localsMap[index]);
+    }
+    private void emitAstoreInsn(int index) {
+        emitStoreInsn('L', index);
+    }
+
+    /**
+     * Emit a boxing call.
+     *
+     * @param type primitive type class to box.
+     */
+    private void emitBoxing(Class<?> type) {
+        Wrapper wrapper = Wrapper.forPrimitiveType(type);
+        String owner = "java/lang/" + wrapper.wrapperType().getSimpleName();
+        String name  = "valueOf";
+        String desc  = "(" + wrapper.basicTypeChar() + ")L" + owner + ";";
+        mv.visitMethodInsn(Opcodes.INVOKESTATIC, owner, name, desc);
+    }
+
+    /**
+     * Emit an unboxing call (plus preceding checkcast).
+     *
+     * @param type wrapper type class to unbox.
+     */
+    private void emitUnboxing(Class<?> type) {
+        Wrapper wrapper = Wrapper.forWrapperType(type);
+        String owner = "java/lang/" + wrapper.wrapperType().getSimpleName();
+        String name  = wrapper.primitiveSimpleName() + "Value";
+        String desc  = "()" + wrapper.basicTypeChar();
+        mv.visitTypeInsn(Opcodes.CHECKCAST, owner);
+        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, owner, name, desc);
+    }
+
+    /**
+     * Emit an implicit conversion.
+     *
+     * @param ptype type of value present on stack
+     * @param pclass type of value required on stack
+     */
+    private void emitImplicitConversion(char ptype, Class<?> pclass) {
+        switch (ptype) {
+        case 'L':
+            if (VerifyType.isNullConversion(Object.class, pclass))
+                return;
+            if (isStaticallyNameable(pclass)) {
+                mv.visitTypeInsn(Opcodes.CHECKCAST, getInternalName(pclass));
+            } else {
+                mv.visitLdcInsn(constantPlaceholder(pclass));
+                mv.visitTypeInsn(Opcodes.CHECKCAST, CLS);
+                mv.visitInsn(Opcodes.SWAP);
+                mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, CLS, "cast", LL_SIG);
+                if (pclass.isArray())
+                    mv.visitTypeInsn(Opcodes.CHECKCAST, OBJARY);
+            }
+            return;
+        case 'I':
+            if (!VerifyType.isNullConversion(int.class, pclass))
+                emitPrimCast(ptype, Wrapper.basicTypeChar(pclass));
+            return;
+        case 'J':
+            assert(pclass == long.class);
+            return;
+        case 'F':
+            assert(pclass == float.class);
+            return;
+        case 'D':
+            assert(pclass == double.class);
+            return;
+        }
+        throw new InternalError("bad implicit conversion: tc="+ptype+": "+pclass);
+    }
+
+    /**
+     * Emits an actual return instruction conforming to the given return type.
+     */
+    private void emitReturnInsn(Class<?> type) {
+        int opcode;
+        switch (Wrapper.basicTypeChar(type)) {
+        case 'I':  opcode = Opcodes.IRETURN;  break;
+        case 'J':  opcode = Opcodes.LRETURN;  break;
+        case 'F':  opcode = Opcodes.FRETURN;  break;
+        case 'D':  opcode = Opcodes.DRETURN;  break;
+        case 'L':  opcode = Opcodes.ARETURN;  break;
+        case 'V':  opcode = Opcodes.RETURN;   break;
+        default:
+            throw new InternalError("unknown return type: " + type);
+        }
+        mv.visitInsn(opcode);
+    }
+
+    private static String getInternalName(Class<?> c) {
+        assert(VerifyAccess.isTypeVisible(c, Object.class));
+        return c.getName().replace('.', '/');
+    }
+
+    /**
+     * Generate customized bytecode for a given LambdaForm.
+     */
+    static MemberName generateCustomizedCode(LambdaForm form, MethodType invokerType) {
+        InvokerBytecodeGenerator g = new InvokerBytecodeGenerator("MH", form, invokerType);
+        return g.loadMethod(g.generateCustomizedCodeBytes());
+    }
+
+    /**
+     * Generate an invoker method for the passed {@link LambdaForm}.
+     */
+    private byte[] generateCustomizedCodeBytes() {
+        classFilePrologue();
+
+        // Suppress this method in backtraces displayed to the user.
+        mv.visitAnnotation("Ljava/lang/invoke/LambdaForm$Hidden;", true);
+
+        // Mark this method as a compiled LambdaForm
+        mv.visitAnnotation("Ljava/lang/invoke/LambdaForm$Compiled;", true);
+
+        // Force inlining of this invoker method.
+        mv.visitAnnotation("Ljava/lang/invoke/ForceInline;", true);
+
+        // iterate over the form's names, generating bytecode instructions for each
+        // start iterating at the first name following the arguments
+        for (int i = lambdaForm.arity; i < lambdaForm.names.length; i++) {
+            Name name = lambdaForm.names[i];
+            MemberName member = name.function.member();
+
+            if (isSelectAlternative(member)) {
+                // selectAlternative idiom
+                // FIXME: make sure this idiom is really present!
+                emitSelectAlternative(name, lambdaForm.names[i + 1]);
+                i++;  // skip MH.invokeBasic of the selectAlternative result
+            } else if (isStaticallyInvocable(member)) {
+                emitStaticInvoke(member, name);
+            } else {
+                emitInvoke(name);
+            }
+
+            // store the result from evaluating to the target name in a local if required
+            // (if this is the last value, i.e., the one that is going to be returned,
+            // avoid store/load/return and just return)
+            if (i == lambdaForm.names.length - 1 && i == lambdaForm.result) {
+                // return value - do nothing
+            } else if (name.type != 'V') {
+                // non-void: actually assign
+                emitStoreInsn(name.type, name.index());
+            }
+        }
+
+        // return statement
+        emitReturn();
+
+        classFileEpilogue();
+        bogusMethod(lambdaForm);
+
+        final byte[] classFile = cw.toByteArray();
+        maybeDump(className, classFile);
+        return classFile;
+    }
+
+    /**
+     * Emit an invoke for the given name.
+     */
+    void emitInvoke(Name name) {
+        if (true) {
+            // push receiver
+            MethodHandle target = name.function.resolvedHandle;
+            assert(target != null) : name.exprString();
+            mv.visitLdcInsn(constantPlaceholder(target));
+            mv.visitTypeInsn(Opcodes.CHECKCAST, MH);
+        } else {
+            // load receiver
+            emitAloadInsn(0);
+            mv.visitTypeInsn(Opcodes.CHECKCAST, MH);
+            mv.visitFieldInsn(Opcodes.GETFIELD, MH, "form", LF_SIG);
+            mv.visitFieldInsn(Opcodes.GETFIELD, LF, "names", LFN_SIG);
+            // TODO more to come
+        }
+
+        // push arguments
+        for (int i = 0; i < name.arguments.length; i++) {
+            emitPushArgument(name, i);
+        }
+
+        // invocation
+        MethodType type = name.function.methodType();
+        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, MH, "invokeBasic", type.basicType().toMethodDescriptorString());
+    }
+
+    static private Class<?>[] STATICALLY_INVOCABLE_PACKAGES = {
+        // Sample classes from each package we are willing to bind to statically:
+        java.lang.Object.class,
+        java.util.Arrays.class,
+        sun.misc.Unsafe.class
+        //MethodHandle.class already covered
+    };
+
+    static boolean isStaticallyInvocable(MemberName member) {
+        if (member == null)  return false;
+        if (member.isConstructor())  return false;
+        Class<?> cls = member.getDeclaringClass();
+        if (cls.isArray() || cls.isPrimitive())
+            return false;  // FIXME
+        if (cls.isAnonymousClass() || cls.isLocalClass())
+            return false;  // inner class of some sort
+        if (cls.getClassLoader() != MethodHandle.class.getClassLoader())
+            return false;  // not on BCP
+        MethodType mtype = member.getMethodOrFieldType();
+        if (!isStaticallyNameable(mtype.returnType()))
+            return false;
+        for (Class<?> ptype : mtype.parameterArray())
+            if (!isStaticallyNameable(ptype))
+                return false;
+        if (!member.isPrivate() && VerifyAccess.isSamePackage(MethodHandle.class, cls))
+            return true;   // in java.lang.invoke package
+        if (member.isPublic() && isStaticallyNameable(cls))
+            return true;
+        return false;
+    }
+
+    static boolean isStaticallyNameable(Class<?> cls) {
+        while (cls.isArray())
+            cls = cls.getComponentType();
+        if (cls.isPrimitive())
+            return true;  // int[].class, for example
+        // could use VerifyAccess.isClassAccessible but the following is a safe approximation
+        if (cls.getClassLoader() != Object.class.getClassLoader())
+            return false;
+        if (VerifyAccess.isSamePackage(MethodHandle.class, cls))
+            return true;
+        if (!Modifier.isPublic(cls.getModifiers()))
+            return false;
+        for (Class<?> pkgcls : STATICALLY_INVOCABLE_PACKAGES) {
+            if (VerifyAccess.isSamePackage(pkgcls, cls))
+                return true;
+        }
+        return false;
+    }
+
+    /**
+     * Emit an invoke for the given name, using the MemberName directly.
+     */
+    void emitStaticInvoke(MemberName member, Name name) {
+        assert(member.equals(name.function.member()));
+        String cname = getInternalName(member.getDeclaringClass());
+        String mname = member.getName();
+        String mtype;
+        byte refKind = member.getReferenceKind();
+        if (refKind == REF_invokeSpecial) {
+            // in order to pass the verifier, we need to convert this to invokevirtual in all cases
+            assert(member.canBeStaticallyBound()) : member;
+            refKind = REF_invokeVirtual;
+        }
+
+        if (member.getDeclaringClass().isInterface() && refKind == REF_invokeVirtual) {
+            // Methods from Object declared in an interface can be resolved by JVM to invokevirtual kind.
+            // Need to convert it back to invokeinterface to pass verification and make the invocation works as expected.
+            refKind = REF_invokeInterface;
+        }
+
+        // push arguments
+        for (int i = 0; i < name.arguments.length; i++) {
+            emitPushArgument(name, i);
+        }
+
+        // invocation
+        if (member.isMethod()) {
+            mtype = member.getMethodType().toMethodDescriptorString();
+            mv.visitMethodInsn(refKindOpcode(refKind), cname, mname, mtype,
+                               member.getDeclaringClass().isInterface());
+        } else {
+            mtype = MethodType.toFieldDescriptorString(member.getFieldType());
+            mv.visitFieldInsn(refKindOpcode(refKind), cname, mname, mtype);
+        }
+    }
+    int refKindOpcode(byte refKind) {
+        switch (refKind) {
+        case REF_invokeVirtual:      return Opcodes.INVOKEVIRTUAL;
+        case REF_invokeStatic:       return Opcodes.INVOKESTATIC;
+        case REF_invokeSpecial:      return Opcodes.INVOKESPECIAL;
+        case REF_invokeInterface:    return Opcodes.INVOKEINTERFACE;
+        case REF_getField:           return Opcodes.GETFIELD;
+        case REF_putField:           return Opcodes.PUTFIELD;
+        case REF_getStatic:          return Opcodes.GETSTATIC;
+        case REF_putStatic:          return Opcodes.PUTSTATIC;
+        }
+        throw new InternalError("refKind="+refKind);
+    }
+
+    /**
+     * Check if MemberName is a call to MethodHandleImpl.selectAlternative.
+     */
+    private boolean isSelectAlternative(MemberName member) {
+        return member != null &&
+               member.getDeclaringClass() == MethodHandleImpl.class &&
+               member.getName().equals("selectAlternative");
+    }
+
+    /**
+     * Emit bytecode for the selectAlternative idiom.
+     *
+     * The pattern looks like (Cf. MethodHandleImpl.makeGuardWithTest):
+     * <blockquote><pre>{@code
+     *   Lambda(a0:L,a1:I)=>{
+     *     t2:I=foo.test(a1:I);
+     *     t3:L=MethodHandleImpl.selectAlternative(t2:I,(MethodHandle(int)int),(MethodHandle(int)int));
+     *     t4:I=MethodHandle.invokeBasic(t3:L,a1:I);t4:I}
+     * }</pre></blockquote>
+     */
+    private void emitSelectAlternative(Name selectAlternativeName, Name invokeBasicName) {
+        MethodType type = selectAlternativeName.function.methodType();
+
+        Name receiver = (Name) invokeBasicName.arguments[0];
+
+        Label L_fallback = new Label();
+        Label L_done     = new Label();
+
+        // load test result
+        emitPushArgument(selectAlternativeName, 0);
+        mv.visitInsn(Opcodes.ICONST_1);
+
+        // if_icmpne L_fallback
+        mv.visitJumpInsn(Opcodes.IF_ICMPNE, L_fallback);
+
+        // invoke selectAlternativeName.arguments[1]
+        MethodHandle target = (MethodHandle) selectAlternativeName.arguments[1];
+        emitPushArgument(selectAlternativeName, 1);  // get 2nd argument of selectAlternative
+        emitAstoreInsn(receiver.index());  // store the MH in the receiver slot
+        emitInvoke(invokeBasicName);
+
+        // goto L_done
+        mv.visitJumpInsn(Opcodes.GOTO, L_done);
+
+        // L_fallback:
+        mv.visitLabel(L_fallback);
+
+        // invoke selectAlternativeName.arguments[2]
+        MethodHandle fallback = (MethodHandle) selectAlternativeName.arguments[2];
+        emitPushArgument(selectAlternativeName, 2);  // get 3rd argument of selectAlternative
+        emitAstoreInsn(receiver.index());  // store the MH in the receiver slot
+        emitInvoke(invokeBasicName);
+
+        // L_done:
+        mv.visitLabel(L_done);
+    }
+
+    private void emitPushArgument(Name name, int paramIndex) {
+        Object arg = name.arguments[paramIndex];
+        char ptype = name.function.parameterType(paramIndex);
+        MethodType mtype = name.function.methodType();
+        if (arg instanceof Name) {
+            Name n = (Name) arg;
+            emitLoadInsn(n.type, n.index());
+            emitImplicitConversion(n.type, mtype.parameterType(paramIndex));
+        } else if ((arg == null || arg instanceof String) && ptype == 'L') {
+            emitConst(arg);
+        } else {
+            if (Wrapper.isWrapperType(arg.getClass()) && ptype != 'L') {
+                emitConst(arg);
+            } else {
+                mv.visitLdcInsn(constantPlaceholder(arg));
+                emitImplicitConversion('L', mtype.parameterType(paramIndex));
+            }
+        }
+    }
+
+    /**
+     * Emits a return statement from a LF invoker. If required, the result type is cast to the correct return type.
+     */
+    private void emitReturn() {
+        // return statement
+        if (lambdaForm.result == -1) {
+            // void
+            mv.visitInsn(Opcodes.RETURN);
+        } else {
+            LambdaForm.Name rn = lambdaForm.names[lambdaForm.result];
+            char rtype = Wrapper.basicTypeChar(invokerType.returnType());
+
+            // put return value on the stack if it is not already there
+            if (lambdaForm.result != lambdaForm.names.length - 1) {
+                emitLoadInsn(rn.type, lambdaForm.result);
+            }
+
+            // potentially generate cast
+            // rtype is the return type of the invoker - generated code must conform to this
+            // rn.type is the type of the result Name in the LF
+            if (rtype != rn.type) {
+                // need cast
+                if (rtype == 'L') {
+                    // possibly cast the primitive to the correct type for boxing
+                    char boxedType = Wrapper.forWrapperType(invokerType.returnType()).basicTypeChar();
+                    if (boxedType != rn.type) {
+                        emitPrimCast(rn.type, boxedType);
+                    }
+                    // cast primitive to reference ("boxing")
+                    emitBoxing(invokerType.returnType());
+                } else {
+                    // to-primitive cast
+                    if (rn.type != 'L') {
+                        // prim-to-prim cast
+                        emitPrimCast(rn.type, rtype);
+                    } else {
+                        // ref-to-prim cast ("unboxing")
+                        throw new InternalError("no ref-to-prim (unboxing) casts supported right now");
+                    }
+                }
+            }
+
+            // generate actual return statement
+            emitReturnInsn(invokerType.returnType());
+        }
+    }
+
+    /**
+     * Emit a type conversion bytecode casting from "from" to "to".
+     */
+    private void emitPrimCast(char from, char to) {
+        // Here's how.
+        // -   indicates forbidden
+        // <-> indicates implicit
+        //      to ----> boolean  byte     short    char     int      long     float    double
+        // from boolean    <->        -        -        -        -        -        -        -
+        //      byte        -       <->       i2s      i2c      <->      i2l      i2f      i2d
+        //      short       -       i2b       <->      i2c      <->      i2l      i2f      i2d
+        //      char        -       i2b       i2s      <->      <->      i2l      i2f      i2d
+        //      int         -       i2b       i2s      i2c      <->      i2l      i2f      i2d
+        //      long        -     l2i,i2b   l2i,i2s  l2i,i2c    l2i      <->      l2f      l2d
+        //      float       -     f2i,i2b   f2i,i2s  f2i,i2c    f2i      f2l      <->      f2d
+        //      double      -     d2i,i2b   d2i,i2s  d2i,i2c    d2i      d2l      d2f      <->
+        if (from == to) {
+            // no cast required, should be dead code anyway
+            return;
+        }
+        Wrapper wfrom = Wrapper.forBasicType(from);
+        Wrapper wto   = Wrapper.forBasicType(to);
+        if (wfrom.isSubwordOrInt()) {
+            // cast from {byte,short,char,int} to anything
+            emitI2X(to);
+        } else {
+            // cast from {long,float,double} to anything
+            if (wto.isSubwordOrInt()) {
+                // cast to {byte,short,char,int}
+                emitX2I(from);
+                if (wto.bitWidth() < 32) {
+                    // targets other than int require another conversion
+                    emitI2X(to);
+                }
+            } else {
+                // cast to {long,float,double} - this is verbose
+                boolean error = false;
+                switch (from) {
+                case 'J':
+                         if (to == 'F') { mv.visitInsn(Opcodes.L2F); }
+                    else if (to == 'D') { mv.visitInsn(Opcodes.L2D); }
+                    else error = true;
+                    break;
+                case 'F':
+                         if (to == 'J') { mv.visitInsn(Opcodes.F2L); }
+                    else if (to == 'D') { mv.visitInsn(Opcodes.F2D); }
+                    else error = true;
+                    break;
+                case 'D':
+                         if (to == 'J') { mv.visitInsn(Opcodes.D2L); }
+                    else if (to == 'F') { mv.visitInsn(Opcodes.D2F); }
+                    else error = true;
+                    break;
+                default:
+                    error = true;
+                    break;
+                }
+                if (error) {
+                    throw new IllegalStateException("unhandled prim cast: " + from + "2" + to);
+                }
+            }
+        }
+    }
+
+    private void emitI2X(char type) {
+        switch (type) {
+        case 'B':  mv.visitInsn(Opcodes.I2B);  break;
+        case 'S':  mv.visitInsn(Opcodes.I2S);  break;
+        case 'C':  mv.visitInsn(Opcodes.I2C);  break;
+        case 'I':  /* naught */                break;
+        case 'J':  mv.visitInsn(Opcodes.I2L);  break;
+        case 'F':  mv.visitInsn(Opcodes.I2F);  break;
+        case 'D':  mv.visitInsn(Opcodes.I2D);  break;
+        case 'Z':
+            // For compatibility with ValueConversions and explicitCastArguments:
+            mv.visitInsn(Opcodes.ICONST_1);
+            mv.visitInsn(Opcodes.IAND);
+            break;
+        default:   throw new InternalError("unknown type: " + type);
+        }
+    }
+
+    private void emitX2I(char type) {
+        switch (type) {
+        case 'J':  mv.visitInsn(Opcodes.L2I);  break;
+        case 'F':  mv.visitInsn(Opcodes.F2I);  break;
+        case 'D':  mv.visitInsn(Opcodes.D2I);  break;
+        default:   throw new InternalError("unknown type: " + type);
+        }
+    }
+
+    private static String basicTypeCharSignature(String prefix, MethodType type) {
+        StringBuilder buf = new StringBuilder(prefix);
+        for (Class<?> ptype : type.parameterList())
+            buf.append(Wrapper.forBasicType(ptype).basicTypeChar());
+        buf.append('_').append(Wrapper.forBasicType(type.returnType()).basicTypeChar());
+        return buf.toString();
+    }
+
+    /**
+     * Generate bytecode for a LambdaForm.vmentry which calls interpretWithArguments.
+     */
+    static MemberName generateLambdaFormInterpreterEntryPoint(String sig) {
+        assert(LambdaForm.isValidSignature(sig));
+        //System.out.println("generateExactInvoker "+sig);
+        // compute method type
+        // first parameter and return type
+        char tret = LambdaForm.signatureReturn(sig);
+        MethodType type = MethodType.methodType(LambdaForm.typeClass(tret), MethodHandle.class);
+        // other parameter types
+        int arity = LambdaForm.signatureArity(sig);
+        for (int i = 1; i < arity; i++) {
+            type = type.appendParameterTypes(LambdaForm.typeClass(sig.charAt(i)));
+        }
+        InvokerBytecodeGenerator g = new InvokerBytecodeGenerator("LFI", "interpret_"+tret, type);
+        return g.loadMethod(g.generateLambdaFormInterpreterEntryPointBytes());
+    }
+
+    private byte[] generateLambdaFormInterpreterEntryPointBytes() {
+        classFilePrologue();
+
+        // Suppress this method in backtraces displayed to the user.
+        mv.visitAnnotation("Ljava/lang/invoke/LambdaForm$Hidden;", true);
+
+        // Don't inline the interpreter entry.
+        mv.visitAnnotation("Ljava/lang/invoke/DontInline;", true);
+
+        // create parameter array
+        emitIconstInsn(invokerType.parameterCount());
+        mv.visitTypeInsn(Opcodes.ANEWARRAY, "java/lang/Object");
+
+        // fill parameter array
+        for (int i = 0; i < invokerType.parameterCount(); i++) {
+            Class<?> ptype = invokerType.parameterType(i);
+            mv.visitInsn(Opcodes.DUP);
+            emitIconstInsn(i);
+            emitLoadInsn(Wrapper.basicTypeChar(ptype), i);
+            // box if primitive type
+            if (ptype.isPrimitive()) {
+                emitBoxing(ptype);
+            }
+            mv.visitInsn(Opcodes.AASTORE);
+        }
+        // invoke
+        emitAloadInsn(0);
+        mv.visitFieldInsn(Opcodes.GETFIELD, MH, "form", "Ljava/lang/invoke/LambdaForm;");
+        mv.visitInsn(Opcodes.SWAP);  // swap form and array; avoid local variable
+        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, LF, "interpretWithArguments", "([Ljava/lang/Object;)Ljava/lang/Object;");
+
+        // maybe unbox
+        Class<?> rtype = invokerType.returnType();
+        if (rtype.isPrimitive() && rtype != void.class) {
+            emitUnboxing(Wrapper.asWrapperType(rtype));
+        }
+
+        // return statement
+        emitReturnInsn(rtype);
+
+        classFileEpilogue();
+        bogusMethod(invokerType);
+
+        final byte[] classFile = cw.toByteArray();
+        maybeDump(className, classFile);
+        return classFile;
+    }
+
+    /**
+     * Generate bytecode for a NamedFunction invoker.
+     */
+    static MemberName generateNamedFunctionInvoker(MethodTypeForm typeForm) {
+        MethodType invokerType = LambdaForm.NamedFunction.INVOKER_METHOD_TYPE;
+        String invokerName = basicTypeCharSignature("invoke_", typeForm.erasedType());
+        InvokerBytecodeGenerator g = new InvokerBytecodeGenerator("NFI", invokerName, invokerType);
+        return g.loadMethod(g.generateNamedFunctionInvokerImpl(typeForm));
+    }
+
+    static int nfi = 0;
+
+    private byte[] generateNamedFunctionInvokerImpl(MethodTypeForm typeForm) {
+        MethodType dstType = typeForm.erasedType();
+        classFilePrologue();
+
+        // Suppress this method in backtraces displayed to the user.
+        mv.visitAnnotation("Ljava/lang/invoke/LambdaForm$Hidden;", true);
+
+        // Force inlining of this invoker method.
+        mv.visitAnnotation("Ljava/lang/invoke/ForceInline;", true);
+
+        // Load receiver
+        emitAloadInsn(0);
+
+        // Load arguments from array
+        for (int i = 0; i < dstType.parameterCount(); i++) {
+            emitAloadInsn(1);
+            emitIconstInsn(i);
+            mv.visitInsn(Opcodes.AALOAD);
+
+            // Maybe unbox
+            Class<?> dptype = dstType.parameterType(i);
+            if (dptype.isPrimitive()) {
+                Class<?> sptype = dstType.basicType().wrap().parameterType(i);
+                Wrapper dstWrapper = Wrapper.forBasicType(dptype);
+                Wrapper srcWrapper = dstWrapper.isSubwordOrInt() ? Wrapper.INT : dstWrapper;  // narrow subword from int
+                emitUnboxing(srcWrapper.wrapperType());
+                emitPrimCast(srcWrapper.basicTypeChar(), dstWrapper.basicTypeChar());
+            }
+        }
+
+        // Invoke
+        String targetDesc = dstType.basicType().toMethodDescriptorString();
+        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, MH, "invokeBasic", targetDesc);
+
+        // Box primitive types
+        Class<?> rtype = dstType.returnType();
+        if (rtype != void.class && rtype.isPrimitive()) {
+            Wrapper srcWrapper = Wrapper.forBasicType(rtype);
+            Wrapper dstWrapper = srcWrapper.isSubwordOrInt() ? Wrapper.INT : srcWrapper;  // widen subword to int
+            // boolean casts not allowed
+            emitPrimCast(srcWrapper.basicTypeChar(), dstWrapper.basicTypeChar());
+            emitBoxing(dstWrapper.primitiveType());
+        }
+
+        // If the return type is void we return a null reference.
+        if (rtype == void.class) {
+            mv.visitInsn(Opcodes.ACONST_NULL);
+        }
+        emitReturnInsn(Object.class);  // NOTE: NamedFunction invokers always return a reference value.
+
+        classFileEpilogue();
+        bogusMethod(dstType);
+
+        final byte[] classFile = cw.toByteArray();
+        maybeDump(className, classFile);
+        return classFile;
+    }
+
+    /**
+     * Emit a bogus method that just loads some string constants. This is to get the constants into the constant pool
+     * for debugging purposes.
+     */
+    private void bogusMethod(Object... os) {
+        if (DUMP_CLASS_FILES) {
+            mv = cw.visitMethod(Opcodes.ACC_STATIC, "dummy", "()V", null, null);
+            for (Object o : os) {
+                mv.visitLdcInsn(o.toString());
+                mv.visitInsn(Opcodes.POP);
+            }
+            mv.visitInsn(Opcodes.RETURN);
+            mv.visitMaxs(0, 0);
+            mv.visitEnd();
+        }
+    }
+}