org.jikesrvm.compilers.opt.ir
Class WeightedBranchTargets

java.lang.Object
  org.jikesrvm.compilers.opt.ir.WeightedBranchTargets

public final class WeightedBranchTargets
extends Object

Used to iterate over the branch targets (including the fall through edge) and associated probabilites of a basic block. Takes into account the ordering of branch instructions when computing the edge weights such that the total target weight will always be equal to 1.0 (flow in == flow out).

targets

private BasicBlock[] targets

weights

private float[] weights

cur

private int cur

max

private int max

WeightedBranchTargets

public WeightedBranchTargets(BasicBlock bb)

reset

public void reset()

hasMoreElements

public boolean hasMoreElements()

advance

public void advance()

curBlock

public BasicBlock curBlock()

curWeight

public float curWeight()

addEdge

private void addEdge(BasicBlock target,
                     float weight)

epsilon

private boolean epsilon(float a,
                        float b)