ir.HIRInfo.indexPropagationSolution = null;
    final public void perform (OPT_IR ir) {      if (ir.desiredSSAOptions.getAbort()) return;      boolean didSomething = eliminateLoads(ir, ir.HIRInfo.indexPropagationSolution);      // Note that SSA is no longer valid!!!      // This will force construction of SSA next time we call EnterSSA      ir.actualSSAOptions.setScalarValid(false);      ir.actualSSAOptions.setHeapValid(false);      ir.HIRInfo.loadEliminationDidSomething = didSomething;    }