Class SSAGetCaughtExceptionInstruction


  • public class SSAGetCaughtExceptionInstruction
    extends SSAInstruction
    A "catch" instruction, inserted at the head of a catch block, which assigns a pending exception object to a local variable. In SSA IRs, these instructions do not appear in the normal instruction array returned by IR.getInstructions(); instead these instructions live in ISSABasicBlock.
    • Constructor Detail

      • SSAGetCaughtExceptionInstruction

        public SSAGetCaughtExceptionInstruction​(int iindex,
                                                int bbNumber,
                                                int exceptionValueNumber)
    • Method Detail

      • 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
      • getException

        public int getException()
        Returns the result.
        Returns:
        int
      • hasDef

        public boolean hasDef()
        Description copied from class: SSAInstruction
        Does this instruction define a normal value, as distinct from a set of exceptions possibly thrown by it (e.g. for invoke instructions).
        Overrides:
        hasDef in class SSAInstruction
        Returns:
        true if the instruction does define a proper value.
        See Also:
        SSAInstruction.getDef()
      • getDef

        public int getDef​(int i)
        Description copied from class: SSAInstruction
        Return the ith def
        Overrides:
        getDef in class SSAInstruction
        Parameters:
        i - number of the def, starting at 0.
      • getBasicBlockNumber

        public int getBasicBlockNumber()
      • isFallThrough

        public boolean isFallThrough()
        Specified by:
        isFallThrough in class SSAInstruction
        Returns:
        true iff this instruction may fall through to the next