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