diff graal/Compiler/src/com/sun/c1x/ir/Infopoint.java @ 2507:9ec15d6914ca

Pull over of compiler from maxine repository.
author Thomas Wuerthinger <thomas@wuerthinger.net>
date Wed, 27 Apr 2011 11:43:22 +0200
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/Compiler/src/com/sun/c1x/ir/Infopoint.java	Wed Apr 27 11:43:22 2011 +0200
@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2010, 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.ir;
+
+import static com.sun.cri.bytecode.Bytecodes.*;
+
+import com.sun.c1x.debug.*;
+import com.sun.c1x.value.*;
+import com.sun.cri.bytecode.*;
+import com.sun.cri.ci.*;
+
+/**
+ * Records debug info at the current code location.
+ *
+ * @author Doug Simon
+ */
+public final class Infopoint extends Instruction {
+
+    public final FrameState state;
+
+    /**
+     * {@link Bytecodes#HERE}, {@link Bytecodes#INFO} or {@link Bytecodes#SAFEPOINT}.
+     */
+    public final int opcode;
+
+    /**
+     * Creates a new Infopoint instance.
+     * @param state the debug info at this instruction
+     */
+    public Infopoint(int opcode, FrameState state) {
+        super(opcode == HERE ? CiKind.Long : CiKind.Void);
+        assert opcode == HERE || opcode == INFO || opcode == SAFEPOINT : Bytecodes.nameOf(opcode);
+        this.opcode = opcode;
+        this.state = state;
+        setFlag(Flag.LiveSideEffect); // ensure this instruction is not eliminated
+        if (opcode == SAFEPOINT) {
+            setFlag(Value.Flag.IsSafepoint);
+        }
+    }
+
+    @Override
+    public void accept(ValueVisitor v) {
+        v.visitInfopoint(this);
+    }
+
+    @Override
+    public FrameState stateBefore() {
+        return state;
+    }
+
+    @Override
+    public void print(LogStream out) {
+        out.print(Bytecodes.nameOf(opcode));
+    }
+}