Mercurial > hg > graal-compiler
view graal/com.oracle.graal.lir/src/com/oracle/graal/lir/ForwardingFrameMapBuilder.java @ 18426:b2b37b36a254
Move freeSpillSlot() from FrameMap to ForwardingFrameMapBuilder.
author | Josef Eisl <josef.eisl@jku.at> |
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date | Thu, 23 Oct 2014 17:48:46 +0200 |
parents | b856446ff7e0 |
children | 9bf59aa9d8c6 |
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/* * Copyright (c) 2014, 2014, 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; import java.util.*; import com.oracle.graal.api.code.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.asm.*; import com.oracle.graal.lir.gen.*; /** * A simple forwarder to {@link FrameMap}. */ public class ForwardingFrameMapBuilder implements FrameMapBuilder { @FunctionalInterface public interface FrameMapFactory { FrameMap newFrameMap(FrameMapBuilder frameMapBuilder); } private final FrameMap frameMap; private final RegisterConfig registerConfig; private final CodeCacheProvider codeCache; public ForwardingFrameMapBuilder(FrameMapFactory factory, CodeCacheProvider codeCache, RegisterConfig registerConfig) { this.registerConfig = registerConfig == null ? codeCache.getRegisterConfig() : registerConfig; this.codeCache = codeCache; // all members must be set up before calling FrameMapFactory#newFrameMap this.frameMap = factory.newFrameMap(this); } private Set<VirtualStackSlot> freedSlots; public VirtualStackSlot allocateSpillSlot(LIRKind kind) { if (freedSlots != null) { for (Iterator<VirtualStackSlot> iter = freedSlots.iterator(); iter.hasNext();) { VirtualStackSlot s = iter.next(); if (s.getLIRKind().equals(kind)) { iter.remove(); if (freedSlots.isEmpty()) { freedSlots = null; } return s; } } } int size = frameMap.spillSlotSize(kind); frameMap.spillSize = NumUtil.roundUp(frameMap.spillSize + size, size); return frameMap.allocateNewSpillSlot(kind, 0); } public StackSlot allocateStackSlots(int slots, BitSet objects, List<StackSlot> outObjectStackSlots) { return frameMap.allocateStackSlots(slots, objects, outObjectStackSlots); } public RegisterConfig getRegisterConfig() { return registerConfig; } public CodeCacheProvider getCodeCache() { return codeCache; } public void freeSpillSlot(VirtualStackSlot slot) { if (freedSlots == null) { freedSlots = new HashSet<>(); } freedSlots.add(slot); } public void callsMethod(CallingConvention cc) { frameMap.callsMethod(cc); } public FrameMap buildFrameMap(LIRGenerationResult res) { if (freedSlots != null) { // If the freed slots cover the complete spill area (except for the return // address slot), then the spill size is reset to its initial value. // Without this, frameNeedsAllocating() would never return true. int total = 0; for (VirtualStackSlot s : freedSlots) { total += frameMap.getTarget().getSizeInBytes(s.getKind()); } if (total == frameMap.spillSize - frameMap.initialSpillSize) { // reset spill area size frameMap.spillSize = frameMap.initialSpillSize; } freedSlots = null; } frameMap.finish(); return frameMap; } }