Field Detail

• allInstructions

  protected final ArrayList<SSAInstruction> allInstructions

  A Mapping from integer -> Instruction

Constructor Detail

• DefUse

  public DefUse​(IR ir)

  Parameters:

  ir - an IR in SSA form.

  Throws:

  IllegalArgumentException - if ir is null

Method Detail

• getMaxValueNumber

  protected int getMaxValueNumber()

  Returns:

  the maximum value number in a particular IR

• initAllInstructions

  protected void initAllInstructions()

  Initialize the allInstructions field with every SSAInstruction in the ir.

• getDef

  protected int getDef​(SSAInstruction s,
                       int i)

  What is the ith value number defined by instruction s?

• getUse

  protected int getUse​(SSAInstruction s,
                       int i)

  What is the ith value number used by instruction s?

• getNumberOfDefs

  protected int getNumberOfDefs​(SSAInstruction s)

  How many value numbers does instruction s def?

• getNumberOfUses

  protected int getNumberOfUses​(SSAInstruction s)

  How many value numbers does instruction s use?

• getDef

  public SSAInstruction getDef​(int v)

  Returns:

  the SSAInstruction that defines the variable with value number v.

• getUses

  public Iterator<SSAInstruction> getUses​(int v)

  Return all uses of the variable with the given value number

• getNumberOfUses

  public int getNumberOfUses​(int v)

  Parameters:

  v - a value number

  Returns:

  the number of uses of the variable with the given value number