Mercurial > hg > truffle
view graal/com.oracle.graal.compiler/src/com/oracle/graal/compiler/target/Backend.java @ 5711:4d7175cf3526
enabled Eclipse/JDT javadoc checking and fixed resulting warnings
author | Doug Simon <doug.simon@oracle.com> |
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date | Thu, 28 Jun 2012 11:11:12 +0200 |
parents | b6617d13ea44 |
children | a1db0ea58b53 |
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/* * Copyright (c) 2009, 2012, 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.compiler.target; import java.lang.reflect.*; import com.oracle.graal.api.code.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.compiler.*; import com.oracle.graal.compiler.gen.*; import com.oracle.graal.graph.*; import com.oracle.graal.lir.*; import com.oracle.graal.lir.asm.*; import com.oracle.max.cri.xir.*; /** * The {@code Backend} class represents a compiler backend for Graal. */ public abstract class Backend { /** * The name of the system property whose value (if non-null) specifies the fully qualified * name of the class to be instantiated by {@link #create(CodeCacheProvider, TargetDescription)}. */ public static final String BACKEND_CLASS_PROPERTY = "graal.compiler.backend.class"; public final CodeCacheProvider runtime; public final TargetDescription target; protected Backend(CodeCacheProvider runtime, TargetDescription target) { this.runtime = runtime; this.target = target; } /** * Creates the architecture and runtime specific back-end object. * The class of the object instantiated must be in the {@link #BACKEND_CLASS_PROPERTY} system property. */ public static Backend create(CodeCacheProvider runtime, TargetDescription target) { String className = System.getProperty(BACKEND_CLASS_PROPERTY); assert className != null : "System property must be defined: " + BACKEND_CLASS_PROPERTY; try { Class<?> c = Class.forName(className); Constructor<?> cons = c.getDeclaredConstructor(CodeCacheProvider.class, TargetDescription.class); return (Backend) cons.newInstance(runtime, target); } catch (Exception e) { throw new Error("Could not instantiate " + className, e); } } public FrameMap newFrameMap(RegisterConfig registerConfig) { return new FrameMap(runtime, target, registerConfig); } public abstract LIRGenerator newLIRGenerator(Graph graph, FrameMap frameMap, ResolvedJavaMethod method, LIR lir, RiXirGenerator xir, Assumptions assumptions); public abstract TargetMethodAssembler newAssembler(FrameMap frameMap, LIR lir); public abstract CiXirAssembler newXirAssembler(); /** * Emits code to do stack overflow checking. * * @param afterFrameInit specifies if the stack pointer has already been adjusted to allocate the current frame */ protected static void emitStackOverflowCheck(TargetMethodAssembler tasm, boolean afterFrameInit) { if (GraalOptions.StackShadowPages > 0) { int frameSize = tasm.frameMap.frameSize(); if (frameSize > 0) { int lastFramePage = frameSize / tasm.target.pageSize; // emit multiple stack bangs for methods with frames larger than a page for (int i = 0; i <= lastFramePage; i++) { int disp = (i + GraalOptions.StackShadowPages) * tasm.target.pageSize; if (afterFrameInit) { disp -= frameSize; } tasm.blockComment("[stack overflow check]"); tasm.asm.bangStack(disp); } } } } /** * Emits the code for a given method. This includes any architecture/runtime specific * prefix/suffix. A prefix typically contains the code for setting up the frame, * spilling callee-save registers, stack overflow checking, handling multiple entry * points etc. A suffix may contain out-of-line stubs and method end guard instructions. * * @param method the method associated with {@code lir} * @param lir the LIR of {@code method} */ public abstract void emitCode(TargetMethodAssembler tasm, ResolvedJavaMethod method, LIR lir); }