protected void addInEdge(PcodeBlock b, int lab) {
		int ourrev = b.outofthis.size();
		int brev = intothis.size();
		intothis.add(new BlockEdge(b, lab, ourrev));
		b.outofthis.add(new BlockEdge(this, lab, brev));
	}
@return the last Address covered by this block
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/pcode/PcodeBlock.java