001    /*
002     *  This file is part of the Jikes RVM project (http://jikesrvm.org).
003     *
004     *  This file is licensed to You under the Eclipse Public License (EPL);
005     *  You may not use this file except in compliance with the License. You
006     *  may obtain a copy of the License at
007     *
008     *      http://www.opensource.org/licenses/eclipse-1.0.php
009     *
010     *  See the COPYRIGHT.txt file distributed with this work for information
011     *  regarding copyright ownership.
012     */
013    package org.jikesrvm.compilers.opt.bc2ir;
014    
015    import org.jikesrvm.compilers.opt.driver.CompilerPhase;
016    import org.jikesrvm.compilers.opt.ir.HIRInfo;
017    import org.jikesrvm.compilers.opt.ir.IR;
018    
019    /**
020     * Translate from bytecodes to HIR
021     */
022    public final class ConvertBCtoHIR extends CompilerPhase {
023    
024      @Override
025      public String getName() {
026        return "Generate HIR";
027      }
028    
029      /**
030       * Generate HIR for ir.method into IR
031       *
032       * @param ir The IR to generate HIR into
033       */
034      @Override
035      public void perform(IR ir) {
036        // Generate the cfg into gc
037        GenerationContext gc = new GenerationContext(ir.method, ir.params, ir.compiledMethod, ir.options, ir.inlinePlan);
038        BC2IR.generateHIR(gc);
039        // Transfer HIR and misc state from gc to the ir object
040        ir.gc = gc;
041        ir.cfg = gc.cfg;
042        ir.regpool = gc.temps;
043        if (gc.allocFrame) {
044          ir.stackManager.forceFrameAllocation();
045        }
046    
047        ir.IRStage = IR.HIR;
048        ir.HIRInfo = new HIRInfo(ir);
049      }
050    
051      // This phase contains no instance fields.
052      @Override
053      public CompilerPhase newExecution(IR ir) {
054        return this;
055      }
056    }