[rvm-commits] SF.net SVN: jikesrvm:[15886] rvmroot/branches/RVM-RegAlloc-ELS/trunk/rvm/ src/org/jikesrvm/compilers/opt/regalloc/LiveIntervalElement.java

[<eri...@us...>]

Revision: 15886
          http://jikesrvm.svn.sourceforge.net/jikesrvm/?rev=15886&view=rev
Author:   eris2006
Date:     2010-07-08 15:24:39 +0000 (Thu, 08 Jul 2010)

Log Message:
-----------
First Commit

Modified Paths:
--------------
    rvmroot/branches/RVM-RegAlloc-ELS/trunk/rvm/src/org/jikesrvm/compilers/opt/regalloc/LiveIntervalElement.java

Modified: rvmroot/branches/RVM-RegAlloc-ELS/trunk/rvm/src/org/jikesrvm/compilers/opt/regalloc/LiveIntervalElement.java
===================================================================
--- rvmroot/branches/RVM-RegAlloc-ELS/trunk/rvm/src/org/jikesrvm/compilers/opt/regalloc/LiveIntervalElement.java	2010-07-08 15:24:22 UTC (rev 15885)
+++ rvmroot/branches/RVM-RegAlloc-ELS/trunk/rvm/src/org/jikesrvm/compilers/opt/regalloc/LiveIntervalElement.java	2010-07-08 15:24:39 UTC (rev 15886)
@@ -12,10 +12,15 @@
  */
 package org.jikesrvm.compilers.opt.regalloc;
 
+import java.util.Iterator;
+
 import org.jikesrvm.compilers.opt.ir.BasicBlock;
 import org.jikesrvm.compilers.opt.ir.Instruction;
 import org.jikesrvm.compilers.opt.ir.Register;
+import org.jikesrvm.compilers.opt.regalloc.LinearScan.CompoundInterval;
+import org.jikesrvm.compilers.opt.regalloc.LinearScan.Interval;
 
+
 /**
  * This class defines a LiveInterval node created by Live Variable analysis
  * and used in Linear Scan.
@@ -75,6 +80,8 @@
     register = reg;
     this.begin = begin;
     this.end = end;
+  
+
   }
 
   public String toString() {
@@ -105,4 +112,26 @@
   public BasicBlock getBasicBlock() { return bb; }
 
   public void setBasicBlock(BasicBlock bb) { this.bb = bb; }
+  /*
+   * Returns the BasicInterval represented by the LiveIntervalElement if and only if we are doing the register
+   * allocation at BasicInterval level else return the compound interval it belongs to.
+   * This may return null, so do a assertion after the call.
+   */
+  public Interval getInterval(){
+	  Interval result=null;
+	  Instruction begin = this.getBegin();
+	  Instruction end = this.getEnd();
+	  int start,finish;
+	  if(begin != null)
+	   start = this.getBegin().scratch;
+	  else
+		  start = this.getBasicBlock().firstInstruction().scratch;
+	  if(end != null)
+	     finish = this.getEnd().scratch;
+	  else
+		  finish = this.getBasicBlock().lastInstruction().scratch;
+	  CompoundInterval ci = (CompoundInterval)this.getRegister().scratchObject;
+	  result=ci.getInterval(start,finish);
+	  return result;
+  }
 }


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