1 /*
2 * Copyright (c) 2014, 2019, 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
24
25 package org.graalvm.compiler.lir.stackslotalloc;
26
27 import static org.graalvm.compiler.lir.LIRValueUtil.asVirtualStackSlot;
28 import static org.graalvm.compiler.lir.LIRValueUtil.isVirtualStackSlot;
29 import static org.graalvm.compiler.lir.stackslotalloc.StackSlotAllocatorUtil.allocatedFramesize;
30 import static org.graalvm.compiler.lir.stackslotalloc.StackSlotAllocatorUtil.allocatedSlots;
31 import static org.graalvm.compiler.lir.stackslotalloc.StackSlotAllocatorUtil.virtualFramesize;
32
33 import org.graalvm.compiler.core.common.cfg.AbstractBlockBase;
34 import org.graalvm.compiler.debug.DebugContext;
35 import org.graalvm.compiler.debug.GraalError;
36 import org.graalvm.compiler.debug.Indent;
37 import org.graalvm.compiler.lir.LIRInstruction;
38 import org.graalvm.compiler.lir.ValueProcedure;
39 import org.graalvm.compiler.lir.VirtualStackSlot;
40 import org.graalvm.compiler.lir.framemap.FrameMapBuilderTool;
41 import org.graalvm.compiler.lir.framemap.SimpleVirtualStackSlot;
42 import org.graalvm.compiler.lir.framemap.VirtualStackSlotRange;
43 import org.graalvm.compiler.lir.gen.LIRGenerationResult;
44 import org.graalvm.compiler.lir.phases.AllocationPhase;
45
46 import jdk.vm.ci.code.StackSlot;
47 import jdk.vm.ci.code.TargetDescription;
48
49 public class SimpleStackSlotAllocator extends AllocationPhase {
50
51 @Override
52 protected void run(TargetDescription target, LIRGenerationResult lirGenRes, AllocationContext context) {
53 allocateStackSlots((FrameMapBuilderTool) lirGenRes.getFrameMapBuilder(), lirGenRes);
54 lirGenRes.buildFrameMap();
55 }
56
57 public void allocateStackSlots(FrameMapBuilderTool builder, LIRGenerationResult res) {
58 DebugContext debug = res.getLIR().getDebug();
59 StackSlot[] mapping = new StackSlot[builder.getNumberOfStackSlots()];
60 boolean allocatedFramesizeEnabled = allocatedFramesize.isEnabled(debug);
61 long currentFrameSize = allocatedFramesizeEnabled ? builder.getFrameMap().currentFrameSize() : 0;
62 for (VirtualStackSlot virtualSlot : builder.getStackSlots()) {
63 final StackSlot slot;
64 if (virtualSlot instanceof SimpleVirtualStackSlot) {
65 slot = mapSimpleVirtualStackSlot(builder, (SimpleVirtualStackSlot) virtualSlot);
66 virtualFramesize.add(debug, builder.getFrameMap().spillSlotSize(virtualSlot.getValueKind()));
67 } else if (virtualSlot instanceof VirtualStackSlotRange) {
68 VirtualStackSlotRange slotRange = (VirtualStackSlotRange) virtualSlot;
69 slot = mapVirtualStackSlotRange(builder, slotRange);
70 virtualFramesize.add(debug, builder.getFrameMap().spillSlotRangeSize(slotRange.getSlots()));
71 } else {
72 throw GraalError.shouldNotReachHere("Unknown VirtualStackSlot: " + virtualSlot);
73 }
74 allocatedSlots.increment(debug);
75 mapping[virtualSlot.getId()] = slot;
76 }
77 updateLIR(res, mapping);
78 if (allocatedFramesizeEnabled) {
79 allocatedFramesize.add(debug, builder.getFrameMap().currentFrameSize() - currentFrameSize);
80 }
81 }
82
83 @SuppressWarnings("try")
84 protected void updateLIR(LIRGenerationResult res, StackSlot[] mapping) {
85 DebugContext debug = res.getLIR().getDebug();
86 try (DebugContext.Scope scope = debug.scope("StackSlotMappingLIR")) {
87 ValueProcedure updateProc = (value, mode, flags) -> {
88 if (isVirtualStackSlot(value)) {
89 StackSlot stackSlot = mapping[asVirtualStackSlot(value).getId()];
90 debug.log("map %s -> %s", value, stackSlot);
91 return stackSlot;
92 }
93 return value;
94 };
95 for (AbstractBlockBase<?> block : res.getLIR().getControlFlowGraph().getBlocks()) {
96 try (Indent indent0 = debug.logAndIndent("block: %s", block)) {
97 for (LIRInstruction inst : res.getLIR().getLIRforBlock(block)) {
98 try (Indent indent1 = debug.logAndIndent("Inst: %d: %s", inst.id(), inst)) {
99 inst.forEachAlive(updateProc);
100 inst.forEachInput(updateProc);
101 inst.forEachOutput(updateProc);
102 inst.forEachTemp(updateProc);
103 inst.forEachState(updateProc);
104 }
105 }
106 }
107 }
108 }
109 }
110
111 protected StackSlot mapSimpleVirtualStackSlot(FrameMapBuilderTool builder, SimpleVirtualStackSlot virtualStackSlot) {
112 return builder.getFrameMap().allocateSpillSlot(virtualStackSlot.getValueKind());
113 }
114
115 protected StackSlot mapVirtualStackSlotRange(FrameMapBuilderTool builder, VirtualStackSlotRange virtualStackSlot) {
116 return builder.getFrameMap().allocateStackSlots(virtualStackSlot.getSlots());
117 }
118 }