--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/Compiler/src/com/sun/c1x/C1XCompilation.java	Wed Apr 27 11:43:22 2011 +0200
@@ -0,0 +1,354 @@
+/*
+ * 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.c1x;
+
+import java.util.*;
+
+import com.sun.c1x.alloc.*;
+import com.sun.c1x.asm.*;
+import com.sun.c1x.gen.*;
+import com.sun.c1x.gen.LIRGenerator.DeoptimizationStub;
+import com.sun.c1x.graph.*;
+import com.sun.c1x.ir.*;
+import com.sun.c1x.lir.*;
+import com.sun.c1x.observer.*;
+import com.sun.c1x.value.*;
+import com.sun.cri.bytecode.*;
+import com.sun.cri.ci.*;
+import com.sun.cri.ri.*;
+
+/**
+ * This class encapsulates global information about the compilation of a particular method,
+ * including a reference to the runtime, statistics about the compiled code, etc.
+ *
+ * @author Ben L. Titzer
+ */
+public final class C1XCompilation {
+
+    private static ThreadLocal<C1XCompilation> currentCompilation = new ThreadLocal<C1XCompilation>();
+
+    public final C1XCompiler compiler;
+    public final CiTarget target;
+    public final RiRuntime runtime;
+    public final RiMethod method;
+    public final RiRegisterConfig registerConfig;
+    public final CiStatistics stats;
+    public final int osrBCI;
+    public final CiAssumptions assumptions = new CiAssumptions();
+    public final FrameState placeholderState;
+
+    private boolean hasExceptionHandlers;
+    private final C1XCompilation parent;
+
+    /**
+     * @see #setNotTypesafe()
+     * @see #isTypesafe()
+     */
+    private boolean typesafe = true;
+
+    private int nextID = 1;
+
+    private FrameMap frameMap;
+    private AbstractAssembler assembler;
+
+    private IR hir;
+
+    private LIRGenerator lirGenerator;
+
+    /**
+     * Creates a new compilation for the specified method and runtime.
+     *
+     * @param compiler the compiler
+     * @param method the method to be compiled or {@code null} if generating code for a stub
+     * @param osrBCI the bytecode index for on-stack replacement, if requested
+     * @param stats externally supplied statistics object to be used if not {@code null}
+     */
+    public C1XCompilation(C1XCompiler compiler, RiMethod method, int osrBCI, CiStatistics stats) {
+        this.parent = currentCompilation.get();
+        currentCompilation.set(this);
+        this.compiler = compiler;
+        this.target = compiler.target;
+        this.runtime = compiler.runtime;
+        this.method = method;
+        this.osrBCI = osrBCI;
+        this.stats = stats == null ? new CiStatistics() : stats;
+        this.registerConfig = method == null ? compiler.globalStubRegisterConfig : runtime.getRegisterConfig(method);
+        this.placeholderState = method != null && method.minimalDebugInfo() ? new MutableFrameState(new IRScope(null, null, method, -1), 0, 0, 0) : null;
+
+        if (compiler.isObserved()) {
+            compiler.fireCompilationStarted(new CompilationEvent(this));
+        }
+    }
+
+    public void close() {
+        currentCompilation.set(parent);
+    }
+
+    public IR hir() {
+        return hir;
+    }
+
+    /**
+     * Records that this compilation has exception handlers.
+     */
+    public void setHasExceptionHandlers() {
+        hasExceptionHandlers = true;
+    }
+
+    /**
+     * Records that this compilation encountered an instruction (e.g. {@link Bytecodes#UNSAFE_CAST})
+     * that breaks the type safety invariant of the input bytecode.
+     */
+    public void setNotTypesafe() {
+        typesafe = false;
+    }
+
+    /**
+     * Checks whether this compilation is for an on-stack replacement.
+     *
+     * @return {@code true} if this compilation is for an on-stack replacement
+     */
+    public boolean isOsrCompilation() {
+        return osrBCI >= 0;
+    }
+
+    /**
+     * Translates a given kind to a canonical architecture kind.
+     * This is an identity function for all but {@link CiKind#Word}
+     * which is translated to {@link CiKind#Int} or {@link CiKind#Long}
+     * depending on whether or not this is a {@linkplain #is64Bit() 64-bit}
+     * compilation.
+     */
+    public CiKind archKind(CiKind kind) {
+        if (kind.isWord()) {
+            return target.arch.is64bit() ? CiKind.Long : CiKind.Int;
+        }
+        return kind;
+    }
+
+    /**
+     * Determines if two given kinds are equal at the {@linkplain #archKind(CiKind) architecture} level.
+     */
+    public boolean archKindsEqual(CiKind kind1, CiKind kind2) {
+        return archKind(kind1) == archKind(kind2);
+    }
+
+    /**
+     * Gets the frame which describes the layout of the OSR interpreter frame for this method.
+     *
+     * @return the OSR frame
+     */
+    public RiOsrFrame getOsrFrame() {
+        return runtime.getOsrFrame(method, osrBCI);
+    }
+
+    /**
+     * Records an assumption that the specified type has no finalizable subclasses.
+     *
+     * @param receiverType the type that is assumed to have no finalizable subclasses
+     * @return {@code true} if the assumption was recorded and can be assumed; {@code false} otherwise
+     */
+    public boolean recordNoFinalizableSubclassAssumption(RiType receiverType) {
+        return false;
+    }
+
+    /**
+     * Converts this compilation to a string.
+     *
+     * @return a string representation of this compilation
+     */
+    @Override
+    public String toString() {
+        if (isOsrCompilation()) {
+            return "osr-compile @ " + osrBCI + ": " + method;
+        }
+        return "compile: " + method;
+    }
+
+    /**
+     * Builds the block map for the specified method.
+     *
+     * @param method the method for which to build the block map
+     * @param osrBCI the OSR bytecode index; {@code -1} if this is not an OSR
+     * @return the block map for the specified method
+     */
+    public BlockMap getBlockMap(RiMethod method, int osrBCI) {
+        // PERF: cache the block map for methods that are compiled or inlined often
+        BlockMap map = new BlockMap(method, hir.numberOfBlocks());
+        boolean isOsrCompilation = false;
+        if (osrBCI >= 0) {
+            map.addEntrypoint(osrBCI, BlockBegin.BlockFlag.OsrEntry);
+            isOsrCompilation = true;
+        }
+        if (!map.build(!isOsrCompilation && C1XOptions.PhiLoopStores)) {
+            throw new CiBailout("build of BlockMap failed for " + method);
+        } else {
+            if (compiler.isObserved()) {
+                String label = CiUtil.format("BlockListBuilder %f %r %H.%n(%p)", method, true);
+                compiler.fireCompilationEvent(new CompilationEvent(this, label, map, method.code().length));
+            }
+        }
+        map.cleanup();
+        stats.bytecodeCount += map.numberOfBytes();
+        stats.blockCount += map.numberOfBlocks();
+        return map;
+    }
+
+    /**
+     * Returns the frame map of this compilation.
+     * @return the frame map
+     */
+    public FrameMap frameMap() {
+        return frameMap;
+    }
+
+    public AbstractAssembler masm() {
+        if (assembler == null) {
+            assembler = compiler.backend.newAssembler(registerConfig);
+            assembler.setFrameSize(frameMap.frameSize());
+            assembler.targetMethod.setCustomStackAreaOffset(frameMap.offsetToCustomArea());
+        }
+        return assembler;
+    }
+
+    public boolean hasExceptionHandlers() {
+        return hasExceptionHandlers;
+    }
+
+    /**
+     * Determines if this compilation has encountered any instructions (e.g. {@link Bytecodes#UNSAFE_CAST})
+     * that break the type safety invariant of the input bytecode.
+     */
+    public boolean isTypesafe() {
+        return typesafe;
+    }
+
+    public CiResult compile() {
+        CiTargetMethod targetMethod;
+        try {
+            emitHIR();
+            emitLIR();
+            targetMethod = emitCode();
+
+            if (C1XOptions.PrintMetrics) {
+                C1XMetrics.BytecodesCompiled += method.code().length;
+            }
+        } catch (CiBailout b) {
+            return new CiResult(null, b, stats);
+        } catch (Throwable t) {
+            return new CiResult(null, new CiBailout("Exception while compiling: " + method, t), stats);
+        } finally {
+            if (compiler.isObserved()) {
+                compiler.fireCompilationFinished(new CompilationEvent(this));
+            }
+        }
+
+        return new CiResult(targetMethod, null, stats);
+    }
+
+    public IR emitHIR() {
+        hir = new IR(this);
+        hir.build();
+        return hir;
+    }
+
+    public void initFrameMap(int numberOfLocks) {
+        frameMap = this.compiler.backend.newFrameMap(method, numberOfLocks);
+    }
+
+    private void emitLIR() {
+        if (C1XOptions.GenLIR) {
+            if (C1XOptions.PrintTimers) {
+                C1XTimers.LIR_CREATE.start();
+            }
+
+            initFrameMap(hir.topScope.maxLocks());
+
+            lirGenerator = compiler.backend.newLIRGenerator(this);
+            for (BlockBegin begin : hir.linearScanOrder()) {
+                lirGenerator.doBlock(begin);
+            }
+
+            if (C1XOptions.PrintTimers) {
+                C1XTimers.LIR_CREATE.stop();
+            }
+
+            new LinearScan(this, hir, lirGenerator, frameMap()).allocate();
+        }
+    }
+
+    private CiTargetMethod emitCode() {
+        if (C1XOptions.GenLIR && C1XOptions.GenCode) {
+            final LIRAssembler lirAssembler = compiler.backend.newLIRAssembler(this);
+            lirAssembler.emitCode(hir.linearScanOrder());
+
+            // generate code for slow cases
+            lirAssembler.emitLocalStubs();
+
+            // generate exception adapters
+            lirAssembler.emitExceptionEntries();
+
+            // generate deoptimization stubs
+            ArrayList<DeoptimizationStub> deoptimizationStubs = lirGenerator.deoptimizationStubs();
+            if (deoptimizationStubs != null) {
+                for (DeoptimizationStub stub : deoptimizationStubs) {
+                    lirAssembler.emitDeoptizationStub(stub);
+                }
+            }
+
+            // generate traps at the end of the method
+            lirAssembler.emitTraps();
+
+            CiTargetMethod targetMethod = masm().finishTargetMethod(method, runtime, lirAssembler.registerRestoreEpilogueOffset, false);
+            if (assumptions.count() > 0) {
+                targetMethod.setAssumptions(assumptions);
+            }
+
+            if (compiler.isObserved()) {
+                compiler.fireCompilationEvent(new CompilationEvent(this, "After code generation", hir.startBlock, false, true, targetMethod));
+            }
+
+            if (C1XOptions.PrintTimers) {
+                C1XTimers.CODE_CREATE.stop();
+            }
+            return targetMethod;
+        }
+
+        return null;
+    }
+
+    public int nextID() {
+        return nextID++;
+    }
+
+    public static C1XCompilation compilation() {
+        C1XCompilation compilation = currentCompilation.get();
+        assert compilation != null;
+        return compilation;
+    }
+
+    public static C1XCompilation compilationOrNull() {
+        return currentCompilation.get();
+    }
+}