# HG changeset patch
# User Doug Simon <doug.simon@oracle.com>
# Date 1355405257 -3600
# Node ID 7915888f5db578f0f275dc1dc2627fa5b89c5f2e
# Parent  38b6d0389a9058a8211bb7635212323229605108
replace manual intrinsification of Class.getModifiers() with a snippet

diff -r 38b6d0389a90 -r 7915888f5db5 graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/meta/HotSpotRuntime.java
--- a/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/meta/HotSpotRuntime.java	Thu Dec 13 14:26:55 2012 +0100
+++ b/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/meta/HotSpotRuntime.java	Thu Dec 13 14:27:37 2012 +0100
@@ -29,7 +29,6 @@
 import static com.oracle.graal.hotspot.HotSpotGraalRuntime.*;
 import static com.oracle.graal.hotspot.snippets.SystemSnippets.*;
 import static com.oracle.graal.java.GraphBuilderPhase.*;
-import static com.oracle.graal.nodes.StructuredGraph.*;
 import static com.oracle.graal.nodes.UnwindNode.*;
 import static com.oracle.graal.nodes.java.RegisterFinalizerNode.*;
 import static com.oracle.graal.snippets.Log.*;
@@ -293,6 +292,7 @@
     protected abstract RegisterConfig createRegisterConfig(boolean globalStubConfig);
 
     public void installSnippets(SnippetInstaller installer, Assumptions assumptions) {
+        installer.install(ClassSnippets.class);
         installer.install(SystemSnippets.class);
         installer.install(UnsafeSnippets.class);
         installer.install(ArrayCopySnippets.class);
@@ -726,21 +726,6 @@
                 hub.setNext(ret);
                 return graph;
             }
-        } else if (holder.equals(lookupJavaType(Class.class))) {
-            if (fullName.equals("getModifiers()I")) {
-                StructuredGraph graph = new StructuredGraph();
-                LocalNode receiver = graph.unique(new LocalNode(0, StampFactory.objectNonNull()));
-                SafeReadNode klass = safeRead(graph, wordKind, receiver, config.klassOffset, StampFactory.forKind(wordKind), INVALID_GRAPH_ID);
-                graph.start().setNext(klass);
-                LocationNode location = LocationNode.create(LocationNode.FINAL_LOCATION, Kind.Int, config.klassModifierFlagsOffset, graph);
-                FloatingReadNode readModifiers = graph.unique(new FloatingReadNode(klass, location, null, StampFactory.intValue()));
-                CompareNode isZero = CompareNode.createCompareNode(Condition.EQ, klass, ConstantNode.defaultForKind(wordKind, graph));
-                GuardNode guard = graph.unique(new GuardNode(isZero, graph.start(), NullCheckException, InvalidateReprofile, true, INVALID_GRAPH_ID));
-                readModifiers.dependencies().add(guard);
-                ReturnNode ret = graph.add(new ReturnNode(readModifiers));
-                klass.setNext(ret);
-                return graph;
-            }
         } else if (holder.equals(lookupJavaType(Thread.class))) {
             if (fullName.equals("currentThread()Ljava/lang/Thread;")) {
                 StructuredGraph graph = new StructuredGraph();
diff -r 38b6d0389a90 -r 7915888f5db5 graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/snippets/ClassSnippets.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/snippets/ClassSnippets.java	Thu Dec 13 14:27:37 2012 +0100
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 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.oracle.graal.hotspot.snippets;
+
+import static com.oracle.graal.hotspot.snippets.HotSpotSnippetUtils.*;
+
+import java.lang.reflect.*;
+
+import com.oracle.graal.snippets.*;
+
+/**
+ * Snippets for {@link java.lang.Class} methods.
+ */
+@ClassSubstitution(java.lang.Class.class)
+public class ClassSnippets implements SnippetsInterface {
+
+    public int getModifiers() {
+        Word klass = loadWordFromObject(this, klassOffset());
+        if (klass == Word.zero()) {
+            // Class for primitive type
+            return Modifier.ABSTRACT | Modifier.FINAL | Modifier.PUBLIC;
+        } else {
+            return loadIntFromWord(klass, klassModifierFlagsOffset());
+        }
+    }
+}
diff -r 38b6d0389a90 -r 7915888f5db5 graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/snippets/HotSpotSnippetUtils.java
--- a/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/snippets/HotSpotSnippetUtils.java	Thu Dec 13 14:26:55 2012 +0100
+++ b/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/snippets/HotSpotSnippetUtils.java	Thu Dec 13 14:27:37 2012 +0100
@@ -274,6 +274,18 @@
 
     @Fold
     public
+    static int klassModifierFlagsOffset() {
+        return config().klassModifierFlagsOffset;
+    }
+
+    @Fold
+    public
+    static int klassOffset() {
+        return config().klassOffset;
+    }
+
+    @Fold
+    public
     static int klassInstanceSizeOffset() {
         return config().klassInstanceSizeOffset;
     }