public void addLocalVar(final LocalExpr var) {
			final int blockIndex = cfg.preOrderIndex(var.block());

			if (StackPRE.DEBUG) {
				System.out.println("add var " + var);
			}

			ExprInfo exprInfo = (ExprInfo) exprInfos.get(var.def());

			if (exprInfo == null) {
				exprInfo = new ExprInfo((LocalExpr) var.def());
				exprs.add(exprInfo);
				exprInfos.put(var.def(), exprInfo);

				if (StackPRE.DEBUG) {
					System.out.println("    add info for " + var);
				}
			}

			exprInfo.vars[blockIndex].add(var);
		}