/*
* This file is part of the Jikes RVM project (http://jikesrvm.org).
*
* This file is licensed to You under the Eclipse Public License (EPL);
* You may not use this file except in compliance with the License. You
* may obtain a copy of the License at
*
* http://www.opensource.org/licenses/eclipse-1.0.php
*
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership.
*/
package org.jikesrvm.compilers.opt.driver.ppc;
import java.util.ArrayList;
import org.jikesrvm.compilers.opt.MutateSplits;
import org.jikesrvm.compilers.opt.OptOptions;
import org.jikesrvm.compilers.opt.controlflow.MIRBranchOptimizations;
import org.jikesrvm.compilers.opt.driver.IRPrinter;
import org.jikesrvm.compilers.opt.driver.OptimizationPlanElement;
import org.jikesrvm.compilers.opt.driver.OptimizationPlanner;
import org.jikesrvm.compilers.opt.lir2mir.ConvertLIRtoMIR;
import org.jikesrvm.compilers.opt.lir2mir.SplitBasicBlock;
import org.jikesrvm.compilers.opt.liveness.LiveAnalysis;
import org.jikesrvm.compilers.opt.mir2mc.ConvertMIRtoMC;
import org.jikesrvm.compilers.opt.regalloc.ExpandCallingConvention;
import org.jikesrvm.compilers.opt.regalloc.PrologueEpilogueCreator;
import org.jikesrvm.compilers.opt.regalloc.RegisterAllocator;
/**
* This class specifies the order in which CompilerPhases are
* executed in the target-specific backend of the optimizing compiler.
* The methods LIR2MIR, MIROptimizations, and MIR2MC each specify the
* elements that make up the main compilation stages.
*/
public abstract class MIROptimizationPlanner extends OptimizationPlanner {
/**
* Initialize the "master plan" for the PowerPC backend of the opt compiler.
*/
public static void intializeMasterPlan(ArrayList<OptimizationPlanElement> temp) {
LIR2MIR(temp);
MIROptimizations(temp);
MIR2MC(temp);
}
/**
* This method defines the optimization plan elements that
* are to be performed to convert LIR to PowerPC MIR.
*
* @param p the plan under construction
*/
private static void LIR2MIR(ArrayList<OptimizationPlanElement> p) {
composeComponents(p, "Convert LIR to MIR", new Object[]{
// Optional printing of final LIR
new IRPrinter("Final LIR") {
@Override
public boolean shouldPerform(OptOptions options) {
return options.PRINT_FINAL_LIR;
}
},
// Split very large basic blocks into smaller ones.
new SplitBasicBlock(),
// Change operations that split live ranges to moves
new MutateSplits(),
// Instruction selection
new ConvertLIRtoMIR(),
// Optional printing of initial MIR
new IRPrinter("Initial MIR") {
@Override
public boolean shouldPerform(OptOptions options) {
return options.PRINT_MIR;
}
}});
}
/**
* This method defines the optimization plan elements that
* are to be performed on PowerPC MIR.
*
* @param p the plan under construction
*/
private static void MIROptimizations(ArrayList<OptimizationPlanElement> p) {
////////////////////
// MIR OPTS(1) (before register allocation)
////////////////////
// currently nothing to do
////////////////////
// GCMapping part1 and RegisterAllocation
////////////////////
composeComponents(p, "Register Mapping", new Object[]{
// MANDATORY: Expand calling convention
new ExpandCallingConvention(),
// MANDATORY: Perform Live analysis and create GC maps
new LiveAnalysis(true, false),
// MANDATORY: Perform register allocation
new RegisterAllocator(),
// MANDATORY: Add prologue and epilogue
new PrologueEpilogueCreator(),});
////////////////////
// MIR OPTS(2) (after register allocation)
// NOTE: GCMapping part 1 has created the GC maps already.
// From now until the end of compilation, we cannot change
// the set of live references at a GC point
// without updating the GCMaps.
// Effectively this means that we can only do the
// most trivial optimizations from
// here on out without having to some potentially complex bookkeeping.
////////////////////
// Peephole branch optimizations
addComponent(p, new MIRBranchOptimizations(1));
}
/**
* This method defines the optimization plan elements that
* are to be performed to convert PowerPC MIR into
* ready-to-execute machinecode (and associated mapping tables).
*
* @param p the plan under construction
*/
private static void MIR2MC(ArrayList<OptimizationPlanElement> p) {
// MANDATORY: Final assembly
addComponent(p, new IRPrinter("Final MIR") {
@Override
public boolean shouldPerform(OptOptions options) {
return options.PRINT_FINAL_MIR;
}
});
addComponent(p, new ConvertMIRtoMC());
}
}