Mercurial > hg > graal-compiler
changeset 22383:310bde1d68f4
Add TraceUtil.
author | Josef Eisl <josef.eisl@jku.at> |
---|---|
date | Tue, 28 Jul 2015 19:38:25 +0200 |
parents | 05af7a8385f2 |
children | 8a8725deea6c |
files | graal/com.oracle.graal.lir/src/com/oracle/graal/lir/alloc/trace/TraceUtil.java |
diffstat | 1 files changed, 42 insertions(+), 0 deletions(-) [+] |
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--- /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; + } +}