prevToken = null;
        while (true) {
            if (ch != -1) {
                ch = readCharFromBuffer();
            }
            if (ch == -1) {
                break;
            } else if (!isDelimiter(ch)) {
                block.append((char) ch);
            } else if (block.length() > 0) {
                break;
            } else {
                blkStart++;
            }
        }

		return funcInlHeur, callsites, err
	}
	funcInlHeur.props = fp

	// Consume callsites.
	callsites = make(encodedCallSiteTab)
	for dr.scan() {
		line := dr.curLine()
		if line == csDelimiter {
			break
		}
		// expected format: "// callsite: <expanded pos> flagstr <desc> flagval <flags> score <score> mask <scoremask> maskstr <scoremaskstring>"
		fields := strings.Fields(line)
		if len(fields) != 12 {