| /* |
| * Copyright (c) 2016, 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 org.graalvm.compiler.hotspot.lir; |
| |
| import static jdk.vm.ci.code.ValueUtil.isStackSlot; |
| |
| import java.util.ArrayList; |
| |
| import org.graalvm.compiler.core.common.cfg.AbstractBlockBase; |
| import org.graalvm.compiler.debug.Debug; |
| import org.graalvm.compiler.debug.Indent; |
| import org.graalvm.compiler.hotspot.HotSpotLIRGenerationResult; |
| import org.graalvm.compiler.hotspot.stubs.Stub; |
| import org.graalvm.compiler.lir.LIR; |
| import org.graalvm.compiler.lir.LIRFrameState; |
| import org.graalvm.compiler.lir.LIRInsertionBuffer; |
| import org.graalvm.compiler.lir.LIRInstruction; |
| import org.graalvm.compiler.lir.StandardOp.SaveRegistersOp; |
| import org.graalvm.compiler.lir.gen.DiagnosticLIRGeneratorTool; |
| import org.graalvm.compiler.lir.gen.DiagnosticLIRGeneratorTool.ZapRegistersAfterInstruction; |
| import org.graalvm.compiler.lir.gen.DiagnosticLIRGeneratorTool.ZapStackArgumentSpaceBeforeInstruction; |
| import org.graalvm.compiler.lir.gen.LIRGenerationResult; |
| import org.graalvm.compiler.lir.phases.PostAllocationOptimizationPhase; |
| |
| import jdk.vm.ci.code.TargetDescription; |
| import jdk.vm.ci.meta.AllocatableValue; |
| |
| /** |
| * Inserts a {@link DiagnosticLIRGeneratorTool#createZapRegisters ZapRegistersOp} after |
| * {@link ZapRegistersAfterInstruction} for stubs and |
| * {@link DiagnosticLIRGeneratorTool#zapArgumentSpace ZapArgumentSpaceOp} after |
| * {@link ZapStackArgumentSpaceBeforeInstruction} for all compiles. |
| */ |
| public final class HotSpotZapRegistersPhase extends PostAllocationOptimizationPhase { |
| |
| @Override |
| protected void run(TargetDescription target, LIRGenerationResult lirGenRes, PostAllocationOptimizationContext context) { |
| Stub stub = ((HotSpotLIRGenerationResult) lirGenRes).getStub(); |
| boolean zapRegisters = stub != null && !stub.preservesRegisters(); |
| boolean zapStack = false; |
| for (AllocatableValue arg : lirGenRes.getCallingConvention().getArguments()) { |
| if (isStackSlot(arg)) { |
| zapStack = true; |
| break; |
| } |
| } |
| if (zapRegisters || zapStack) { |
| LIR lir = lirGenRes.getLIR(); |
| processLIR(context.diagnosticLirGenTool, (HotSpotLIRGenerationResult) lirGenRes, lir, zapRegisters, zapStack); |
| } |
| } |
| |
| private static void processLIR(DiagnosticLIRGeneratorTool diagnosticLirGenTool, HotSpotLIRGenerationResult res, LIR lir, boolean zapRegisters, boolean zapStack) { |
| LIRInsertionBuffer buffer = new LIRInsertionBuffer(); |
| for (AbstractBlockBase<?> block : lir.codeEmittingOrder()) { |
| if (block != null) { |
| processBlock(diagnosticLirGenTool, res, lir, buffer, block, zapRegisters, zapStack); |
| } |
| } |
| } |
| |
| @SuppressWarnings("try") |
| private static void processBlock(DiagnosticLIRGeneratorTool diagnosticLirGenTool, HotSpotLIRGenerationResult res, LIR lir, LIRInsertionBuffer buffer, AbstractBlockBase<?> block, |
| boolean zapRegisters, boolean zapStack) { |
| try (Indent indent = Debug.logAndIndent("Process block %s", block)) { |
| ArrayList<LIRInstruction> instructions = lir.getLIRforBlock(block); |
| buffer.init(instructions); |
| for (int index = 0; index < instructions.size(); index++) { |
| LIRInstruction inst = instructions.get(index); |
| if (zapStack && inst instanceof ZapStackArgumentSpaceBeforeInstruction) { |
| LIRInstruction zap = diagnosticLirGenTool.zapArgumentSpace(); |
| if (zap != null) { |
| buffer.append(index, zap); |
| } |
| } |
| if (zapRegisters && inst instanceof ZapRegistersAfterInstruction) { |
| LIRFrameState state = getLIRState(inst); |
| if (state != null) { |
| SaveRegistersOp zap = diagnosticLirGenTool.createZapRegisters(); |
| SaveRegistersOp old = res.getCalleeSaveInfo().put(state, zap); |
| assert old == null : "Already another SaveRegisterOp registered! " + old; |
| buffer.append(index + 1, (LIRInstruction) zap); |
| Debug.log("Insert ZapRegister after %s", inst); |
| } |
| } |
| } |
| buffer.finish(); |
| } |
| } |
| |
| /** |
| * Returns the {@link LIRFrameState} of an instruction. |
| */ |
| private static LIRFrameState getLIRState(LIRInstruction inst) { |
| final LIRFrameState[] lirState = {null}; |
| inst.forEachState(state -> { |
| assert lirState[0] == null : "Multiple states: " + inst; |
| lirState[0] = state; |
| }); |
| assert lirState[0] != null : "No state: " + inst; |
| return lirState[0]; |
| } |
| |
| } |