1 cananian 1.1.2.1 // PFOFFSET.java, created Wed Jan 20 21:47:52 1999 by cananian 2 cananian 1.1.2.1 // Copyright (C) 1999 C. Scott Ananian <cananian@alumni.princeton.edu> 3 cananian 1.1.2.1 // Licensed under the terms of the GNU GPL; see COPYING for details. 4 cananian 1.1.2.1 package harpoon.IR.LowQuad; 5 cananian 1.1.2.1 6 cananian 1.1.2.1 import harpoon.ClassFile.HCodeElement; 7 cananian 1.1.2.1 import harpoon.ClassFile.HField; 8 cananian 1.1.2.1 import harpoon.Temp.Temp; 9 cananian 1.1.2.1 import harpoon.Temp.TempMap; 10 cananian 1.1.2.1 import harpoon.Util.Util; 11 cananian 1.1.2.1 12 cananian 1.1.2.1 /** 13 cananian 1.1.2.1 * <code>PFOFFSET</code> computes the <code>POINTER</code> offset 14 cananian 1.1.2.1 * needed to access a given <b>non-static</b> field. <code>PFCONST</code> 15 cananian 1.1.2.1 * is used to access a static field. 16 cananian 1.1.2.1 * 17 cananian 1.1.2.1 * @author C. Scott Ananian <cananian@alumni.princeton.edu> 18 cananian 1.5 * @version $Id: PFOFFSET.java,v 1.5 2002/04/11 04:00:21 cananian Exp $ 19 cananian 1.1.2.1 */ 20 cananian 1.1.2.1 public class PFOFFSET extends PCONST { 21 cananian 1.1.2.1 /** The <code>HField</code> to address. */ 22 cananian 1.1.2.1 protected final HField field; 23 cananian 1.1.2.1 24 cananian 1.1.2.1 /** Creates a <code>PFOFFSET</code> representing the <code>POINTER</code> 25 cananian 1.1.2.1 * offset needed to access a given <b>non-static</b> field. 26 cananian 1.1.2.1 * @param dst 27 cananian 1.1.2.1 * the <code>Temp</code> in which to store the computed offset. 28 cananian 1.1.2.1 * @param field 29 cananian 1.1.2.1 * the <code>HField</code> whose offset to compute. 30 cananian 1.1.2.1 */ 31 cananian 1.1.2.1 public PFOFFSET(LowQuadFactory qf, HCodeElement source, 32 cananian 1.1.2.1 final Temp dst, final HField field) { 33 cananian 1.1.2.1 super(qf, source, dst); 34 cananian 1.1.2.1 this.field = field; 35 cananian 1.3.2.1 assert field!=null && !field.isStatic(); 36 cananian 1.1.2.1 } 37 cananian 1.1.2.1 // ACCESSOR METHODS: 38 cananian 1.1.2.1 /** Returns the field whose offset is computed. */ 39 cananian 1.1.2.1 public HField field() { return field; } 40 cananian 1.1.2.1 41 cananian 1.1.2.1 public int kind() { return LowQuadKind.PFOFFSET; } 42 cananian 1.1.2.1 43 cananian 1.1.2.1 public harpoon.IR.Quads.Quad rename(harpoon.IR.Quads.QuadFactory qf, 44 cananian 1.1.2.1 TempMap defMap, TempMap useMap) { 45 cananian 1.1.2.1 return new PFOFFSET((LowQuadFactory)qf, this, 46 cananian 1.1.2.1 map(defMap, dst), field); 47 cananian 1.1.2.1 } 48 cananian 1.1.2.1 49 cananian 1.1.2.2 void accept(LowQuadVisitor v) { v.visit(this); } 50 cananian 1.5 <T> T accept(LowQuadValueVisitor<T> v) { return v.visit(this); } 51 cananian 1.1.2.1 52 cananian 1.1.2.1 public String toString() { 53 cananian 1.1.2.1 return dst.toString() + " = PFOFFSET " + 54 cananian 1.1.2.1 field.getDeclaringClass().getName() + "." + field.getName(); 55 cananian 1.1.2.1 } 56 cananian 1.2 }