Class AstGlobalRead


public class AstGlobalRead extends SSAGetInstruction
A read of a global variable denoted by a FieldReference
Author:
Julian Dolby (dolby@us.ibm.com)
  • Constructor Details

    • AstGlobalRead

      public AstGlobalRead(int iindex, int lhs, FieldReference global)
  • Method Details

    • 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

      Overrides:
      copyForSSA in class SSAGetInstruction
    • toString

      public String toString(SymbolTable symbolTable)
      Overrides:
      toString in class SSAGetInstruction
    • 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.
      Overrides:
      visit in class SSAGetInstruction
      See Also:
    • isFallThrough

      public boolean isFallThrough()
      Overrides:
      isFallThrough in class SSAGetInstruction
      Returns:
      true iff this instruction may fall through to the next
      See Also:
    • getExceptionTypes

      public Collection<TypeReference> getExceptionTypes()
      Description copied from class: SSAInstruction
      This method should never return null.
      Overrides:
      getExceptionTypes in class SSAInstruction
      Returns:
      the set of exception types that an instruction might throw ... disregarding athrows and invokes.
    • getGlobalName

      public String getGlobalName()