Class FixedParametersInvokeInstruction

Direct Known Subclasses:
AstJavaInvokeInstruction

public abstract class FixedParametersInvokeInstruction extends MultiReturnValueInvokeInstruction
This abstract instruction extends the abstract invoke with functionality to support invocations with a fixed number of arguments---the only case in some languages and a common case even in scripting languages.
Author:
Julian Dolby (dolby@us.ibm.com)
  • Constructor Details

    • FixedParametersInvokeInstruction

      public FixedParametersInvokeInstruction(int iindex, int[] results, int[] params, int exception, CallSiteReference site)
    • FixedParametersInvokeInstruction

      public FixedParametersInvokeInstruction(int iindex, int result, int[] params, int exception, CallSiteReference site)
    • FixedParametersInvokeInstruction

      public FixedParametersInvokeInstruction(int iindex, int[] params, int exception, CallSiteReference site)
      Constructor InvokeInstruction. This case for void return values
  • Method Details

    • copyInstruction

      protected abstract SSAInstruction copyInstruction(SSAInstructionFactory insts, int[] result, int[] params, int exception)
    • copyForSSA

      public SSAInstruction copyForSSA(SSAInstructionFactory insts, int[] defs, int[] uses)
      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
    • getNumberOfPositionalParameters

      public int getNumberOfPositionalParameters()
      Description copied from class: SSAAbstractInvokeInstruction
      How many parameters does this call specify?
      Specified by:
      getNumberOfPositionalParameters in class SSAAbstractInvokeInstruction
    • visit

      public void visit(SSAInstruction.IVisitor v)
      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
    • getNumberOfUses

      public int getNumberOfUses()
      Overrides:
      getNumberOfUses in class SSAInstruction
    • hashCode

      public int hashCode()
      Specified by:
      hashCode in class SSAInstruction
    • getUse

      public int getUse(int j)
      Overrides:
      getUse in class SSAInstruction
      Returns:
      value number representing the jth use in this instruction. -1 means TOP (i.e., the value doesn't matter)