# HG changeset patch
# User Josef Eisl <josef.eisl@jku.at>
# Date 1438105105 -7200
# Node ID 310bde1d68f4f97c22e9c6367e71ab5fdf2b5524
# Parent  05af7a8385f22ec2a23b223ccd0a69d0cb9c6066
Add TraceUtil.

diff -r 05af7a8385f2 -r 310bde1d68f4 graal/com.oracle.graal.lir/src/com/oracle/graal/lir/alloc/trace/TraceUtil.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.graal.lir/src/com/oracle/graal/lir/alloc/trace/TraceUtil.java	Tue Jul 28 19:38:25 2015 +0200
@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2015, 2015, 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.lir.alloc.trace;
+
+import com.oracle.graal.compiler.common.alloc.TraceBuilder.TraceBuilderResult;
+import com.oracle.graal.compiler.common.cfg.*;
+
+class TraceUtil {
+
+    static AbstractBlockBase<?> getBestTraceInterPredecessor(TraceBuilderResult<?> traceResult, AbstractBlockBase<?> block) {
+        AbstractBlockBase<?> bestPred = null;
+        int bestTraceId = traceResult.getTraceForBlock(block);
+        for (AbstractBlockBase<?> pred : block.getPredecessors()) {
+            int predTraceId = traceResult.getTraceForBlock(pred);
+            if (predTraceId < bestTraceId) {
+                bestPred = pred;
+                bestTraceId = predTraceId;
+            }
+        }
+        return bestPred;
+    }
+}