Class SSAUnaryOpInstruction

Direct Known Subclasses:
AssignInstruction, SSAPiInstruction

public class SSAUnaryOpInstruction extends SSAAbstractUnaryInstruction
An SSA instruction for some unary operator.
See Also:
  • Constructor Details

  • Method Details

    • copyForSSA

      public SSAInstruction copyForSSA(SSAInstructionFactory insts, int[] defs, int[] uses) throws IllegalArgumentException
      Description copied from class: SSAInstruction
      This method is meant to be used during SSA conversion for an IR that is not in SSA form. It creates a new SSAInstruction of the same type as the receiver, with a combination of the receiver's uses and defs and those from the method parameters.

      In particular, if the 'defs' parameter is null, then the new instruction has the same defs as the receiver. If 'defs' is not null, it must be an array with a size equal to the number of defs that the receiver instruction has. In this case, the new instruction has defs taken from the array. The uses of the new instruction work in the same way with the 'uses' parameter.

      Note that this only applies to CAst-based IR translation, since Java bytecode-based IR generation uses a different SSA construction mechanism.

      TODO: move this into the SSAInstructionFactory

      Specified by:
      copyForSSA in class SSAInstruction
      Throws:
      IllegalArgumentException
    • toString

      public String toString(SymbolTable symbolTable)
      Specified by:
      toString in class SSAInstruction
    • visit

      public void visit(SSAInstruction.IVisitor v) throws NullPointerException
      Description copied from class: SSAInstruction
      Apply an IVisitor to this instruction. We invoke the appropriate IVisitor method according to the type of this instruction.
      Specified by:
      visit in class SSAInstruction
      Throws:
      NullPointerException
      See Also:
    • getOpcode

      public IUnaryOpInstruction.IOperator getOpcode()