--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.max.cri/src/com/sun/cri/ri/RiRuntime.java	Sat Dec 17 19:59:18 2011 +0100
@@ -0,0 +1,240 @@
+/*
+ * Copyright (c) 2009, 2011, 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.
+ *
+ * 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 com.sun.cri.ri;
+
+import java.lang.reflect.*;
+
+import com.sun.cri.ci.*;
+
+/**
+ * Encapsulates the main functionality of the runtime for the compiler, including access
+ * to constant pools, OSR frames, inlining requirements, and runtime calls such as checkcast.
+s */
+public interface RiRuntime {
+
+    /**
+     * Checks whether the specified method is required to be inlined (for semantic reasons).
+     * If this method returns true, then the null-check of the receiver emitted during
+     * inlining is omitted.
+     *
+     * @param method the method being called
+     * @return {@code true} if the method must be inlined; {@code false} to let the compiler
+     * use its own heuristics
+     */
+    boolean mustInline(RiResolvedMethod method);
+
+    /**
+     * Checks whether the specified method must not be inlined (for semantic reasons).
+     * @param method the method being called
+     * @return {@code true} if the method must not be inlined; {@code false} to let the compiler
+     * use its own heuristics
+     */
+    boolean mustNotInline(RiResolvedMethod method);
+
+    /**
+     * Checks whether the specified method cannot be compiled.
+     * @param method the method being called
+     * @return {@code true} if the method cannot be compiled
+     */
+    boolean mustNotCompile(RiResolvedMethod method);
+
+    /**
+     * Offset of the lock within the lock object on the stack.
+
+     * Note: superseded by sizeOfLockData() in Graal.
+     *
+     * @return the offset in bytes
+     */
+    int basicObjectLockOffsetInBytes();
+
+    /**
+     * Get the size in bytes of a lock object on the stack.
+     *
+     * Note: superseded by sizeOfLockData() in Graal.
+     */
+    int sizeOfBasicObjectLock();
+
+    /**
+     * Get the size in bytes for locking information on the stack.
+     */
+    int sizeOfLockData();
+
+    /**
+     * The offset of the normal entry to the code. The compiler inserts NOP instructions to satisfy this constraint.
+     *
+     * @return the code offset in bytes
+     */
+    int codeOffset();
+
+    /**
+     * Returns the disassembly of the given code bytes. Used for debugging purposes only.
+     *
+     * @param code the code bytes that should be disassembled
+     * @param address an address at which the bytes are located. This can be used for an address prefix per line of disassembly.
+     * @return the disassembly. This will be of length 0 if the runtime does not support disassembling.
+     */
+    String disassemble(byte[] code, long address);
+
+    /**
+     * Returns the disassembly of the given code bytes. Used for debugging purposes only.
+     *
+     * @param targetMethod the {@link CiTargetMethod} containing the code bytes that should be disassembled
+     * @return the disassembly. This will be of length 0 if the runtime does not support disassembling.
+     */
+    String disassemble(CiTargetMethod targetMethod);
+
+    /**
+     * Returns the disassembly of the given method in a {@code javap}-like format.
+     * Used for debugging purposes only.
+     *
+     * @param method the method that should be disassembled
+     * @return the disassembly. This will be of length 0 if the runtime does not support disassembling.
+     */
+    String disassemble(RiResolvedMethod method);
+
+    /**
+     * Registers the given compiler stub and returns an object that can be used to identify it in the relocation
+     * information.
+     *
+     * @param targetMethod the target method representing the code of the compiler stub
+     * @param name the name of the stub, used for debugging purposes only
+     * @return the identification object
+     */
+    Object registerCompilerStub(CiTargetMethod targetMethod, String name);
+
+    /**
+     * Returns the RiType object representing the base type for the given kind.
+     */
+    RiResolvedType asRiType(CiKind kind);
+
+    /**
+     * Returns the type of the given constant object.
+     *
+     * @return {@code null} if {@code constant.isNull() || !constant.kind.isObject()}
+     */
+    RiResolvedType getTypeOf(CiConstant constant);
+
+
+    RiResolvedType getType(Class<?> clazz);
+
+    /**
+     * Returns true if the given type is a subtype of java/lang/Throwable.
+     */
+    boolean isExceptionType(RiResolvedType type);
+
+    /**
+     * Checks whether this method is foldable (i.e. if it is a pure function without side effects).
+     * @param method the method that is checked
+     * @return whether the method is foldable
+     */
+    boolean isFoldable(RiResolvedMethod method);
+
+    /**
+     * Attempts to compile-time evaluate or "fold" a call to a given method. A foldable method is a pure function
+     * that has no side effects. Such methods can be executed via reflection when all their inputs are constants,
+     * and the resulting value is substituted for the method call. May only be called on methods for which
+     * isFoldable(method) returns {@code true}. The array of constant for arguments may contain {@code null} values, which
+     * means that this particular argument does not evaluate to a compile time constant.
+     *
+     * @param method the compiler interface method for which folding is being requested
+     * @param args the arguments to the call as an array of CiConstant objects
+     * @return the result of the folding or {@code null} if no folding occurred
+     */
+    CiConstant fold(RiResolvedMethod method, CiConstant[] args);
+
+    /**
+     * Used by the canonicalizer to compare objects, since a given runtime might not want to expose the real objects to the compiler.
+     *
+     * @return true if the two parameters represent the same runtime object, false otherwise
+     */
+    boolean areConstantObjectsEqual(CiConstant x, CiConstant y);
+
+    /**
+     * Gets the register configuration to use when compiling a given method.
+     *
+     * @param method the top level method of a compilation
+     */
+    RiRegisterConfig getRegisterConfig(RiMethod method);
+
+    /**
+     * Custom area on the stack of each compiled method that the VM can use for its own purposes.
+     * @return the size of the custom area in bytes
+     */
+    int getCustomStackAreaSize();
+
+    /**
+     * Gets the length of the array that is wrapped in a CiConstant object.
+     */
+    int getArrayLength(CiConstant array);
+
+    /**
+     * Converts the given CiConstant object to a object.
+     *
+     * @return {@code null} if the conversion is not possible <b>OR</b> {@code c.isNull() == true}
+     */
+    Object asJavaObject(CiConstant c);
+
+    /**
+     * Converts the given CiConstant object to a {@link Class} object.
+     *
+     * @return {@code null} if the conversion is not possible.
+     */
+    Class<?> asJavaClass(CiConstant c);
+
+    /**
+     * Performs any runtime-specific conversion on the object used to describe the target of a call.
+     */
+    Object asCallTarget(Object target);
+
+    /**
+     * Returns the maximum absolute offset of a runtime call target from any position in the code cache or -1
+     * when not known or not applicable. Intended for determining the required size of address/offset fields.
+     */
+    long getMaxCallTargetOffset(CiRuntimeCall rtcall);
+
+    /**
+     * Provides the {@link RiMethod} for a {@link Method} obtained via reflection.
+     */
+    RiResolvedMethod getRiMethod(Method reflectionMethod);
+
+    /**
+     * Installs some given machine code as the implementation of a given method.
+     *
+     * @param method a method whose executable code is being modified
+     * @param code the code to be executed when {@code method} is called
+     */
+    void installMethod(RiMethod method, CiTargetMethod code);
+
+    /**
+     * Adds the given machine code as an implementation of the given method without making it the default implementation.
+     * @param method a method to which the executable code is begin added
+     * @param code the code to be added
+     * @return a reference to the compiled and ready-to-run code
+     */
+    RiCompiledMethod addMethod(RiResolvedMethod method, CiTargetMethod code);
+
+    /**
+     * Executes the given runnable on a compiler thread, which means that it can access constant pools, etc.
+     */
+    void executeOnCompilerThread(Runnable r);
+}