private int fitPlanForRange(int ropReg, NormalSsaInsn insn,
int[] categoriesForIndex, BitSet outMovesRequired) {
RegisterSpecList sources = insn.getSources();
int szSources = sources.size();
int fitWidth = 0;
IntSet liveOut = insn.getBlock().getLiveOutRegs();
RegisterSpecList liveOutSpecs = ssaSetToSpecs(liveOut);
// An SSA reg may only be mapped into a range once.
BitSet seen = new BitSet(ssaMeth.getRegCount());