1 /*
2 * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23 package org.graalvm.compiler.lir.stackslotalloc;
24
25 import static org.graalvm.compiler.lir.LIRValueUtil.asVirtualStackSlot;
26 import static org.graalvm.compiler.lir.LIRValueUtil.isVirtualStackSlot;
27 import static org.graalvm.compiler.lir.stackslotalloc.StackSlotAllocatorUtil.allocatedFramesize;
28 import static org.graalvm.compiler.lir.stackslotalloc.StackSlotAllocatorUtil.allocatedSlots;
29 import static org.graalvm.compiler.lir.stackslotalloc.StackSlotAllocatorUtil.virtualFramesize;
30
31 import org.graalvm.compiler.core.common.cfg.AbstractBlockBase;
32 import org.graalvm.compiler.debug.DebugContext;
33 import org.graalvm.compiler.debug.GraalError;
34 import org.graalvm.compiler.debug.Indent;
35 import org.graalvm.compiler.lir.LIRInstruction;
36 import org.graalvm.compiler.lir.ValueProcedure;
37 import org.graalvm.compiler.lir.VirtualStackSlot;
38 import org.graalvm.compiler.lir.framemap.FrameMapBuilderTool;
39 import org.graalvm.compiler.lir.framemap.SimpleVirtualStackSlot;
40 import org.graalvm.compiler.lir.framemap.VirtualStackSlotRange;
41 import org.graalvm.compiler.lir.gen.LIRGenerationResult;
42 import org.graalvm.compiler.lir.phases.AllocationPhase;
43
44 import jdk.vm.ci.code.StackSlot;
45 import jdk.vm.ci.code.TargetDescription;
46
47 public class SimpleStackSlotAllocator extends AllocationPhase {
48
49 @Override
50 protected void run(TargetDescription target, LIRGenerationResult lirGenRes, AllocationContext context) {
51 allocateStackSlots((FrameMapBuilderTool) lirGenRes.getFrameMapBuilder(), lirGenRes);
52 lirGenRes.buildFrameMap();
53 }
54
55 public void allocateStackSlots(FrameMapBuilderTool builder, LIRGenerationResult res) {
56 DebugContext debug = res.getLIR().getDebug();
57 StackSlot[] mapping = new StackSlot[builder.getNumberOfStackSlots()];
58 boolean allocatedFramesizeEnabled = allocatedFramesize.isEnabled(debug);
59 long currentFrameSize = allocatedFramesizeEnabled ? builder.getFrameMap().currentFrameSize() : 0;
60 for (VirtualStackSlot virtualSlot : builder.getStackSlots()) {
61 final StackSlot slot;
62 if (virtualSlot instanceof SimpleVirtualStackSlot) {
63 slot = mapSimpleVirtualStackSlot(builder, (SimpleVirtualStackSlot) virtualSlot);
64 virtualFramesize.add(debug, builder.getFrameMap().spillSlotSize(virtualSlot.getValueKind()));
65 } else if (virtualSlot instanceof VirtualStackSlotRange) {
66 VirtualStackSlotRange slotRange = (VirtualStackSlotRange) virtualSlot;
67 slot = mapVirtualStackSlotRange(builder, slotRange);
68 virtualFramesize.add(debug, builder.getFrameMap().spillSlotRangeSize(slotRange.getSlots()));
69 } else {
70 throw GraalError.shouldNotReachHere("Unknown VirtualStackSlot: " + virtualSlot);
71 }
72 allocatedSlots.increment(debug);
73 mapping[virtualSlot.getId()] = slot;
74 }
75 updateLIR(res, mapping);
76 if (allocatedFramesizeEnabled) {
77 allocatedFramesize.add(debug, builder.getFrameMap().currentFrameSize() - currentFrameSize);
78 }
79 }
80
81 @SuppressWarnings("try")
82 protected void updateLIR(LIRGenerationResult res, StackSlot[] mapping) {
83 DebugContext debug = res.getLIR().getDebug();
84 try (DebugContext.Scope scope = debug.scope("StackSlotMappingLIR")) {
85 ValueProcedure updateProc = (value, mode, flags) -> {
86 if (isVirtualStackSlot(value)) {
87 StackSlot stackSlot = mapping[asVirtualStackSlot(value).getId()];
88 debug.log("map %s -> %s", value, stackSlot);
89 return stackSlot;
90 }
91 return value;
92 };
93 for (AbstractBlockBase<?> block : res.getLIR().getControlFlowGraph().getBlocks()) {
94 try (Indent indent0 = debug.logAndIndent("block: %s", block)) {
95 for (LIRInstruction inst : res.getLIR().getLIRforBlock(block)) {
96 try (Indent indent1 = debug.logAndIndent("Inst: %d: %s", inst.id(), inst)) {
97 inst.forEachAlive(updateProc);
98 inst.forEachInput(updateProc);
99 inst.forEachOutput(updateProc);
100 inst.forEachTemp(updateProc);
101 inst.forEachState(updateProc);
102 }
103 }
104 }
105 }
106 }
107 }
108
109 protected StackSlot mapSimpleVirtualStackSlot(FrameMapBuilderTool builder, SimpleVirtualStackSlot virtualStackSlot) {
110 return builder.getFrameMap().allocateSpillSlot(virtualStackSlot.getValueKind());
111 }
112
113 protected StackSlot mapVirtualStackSlotRange(FrameMapBuilderTool builder, VirtualStackSlotRange virtualStackSlot) {
114 return builder.getFrameMap().allocateStackSlots(virtualStackSlot.getSlots(), virtualStackSlot.getObjects());
115 }
116 }