There are at least two (very) outdated doxygen API docs available on llvm.org: http://llvm.org/test-doxygen http://llvm.org/docs/doxygen/html/ Especially the second one I find problematic, because searching API things on Google will end up on that page. The correct Doxygen deployment is at http://llvm.org/doxygen/, which is a path that's Disallowed through robots.txt. I think the outdated instances should be deleted (unless there is a reason to keep them around). And is there a reason to hide the real API Documentation from Google?
It appears that there are additional stray files to be found in the "real" documentation location, such as http://llvm.org/doxygen/Statistic_8h-source.html
With the move of llvm.org, it appears the outdated doxygens have vanished. I guess by the letter of the word this bug could be closed. There is however still the issue with googling for LLVM API. The new doxygen is hidden from the robots, and the old doxygens will fade from the index soon. I anticipate a wave of complaints :) Is there still a reason to keep the new doxygen hidden?
A redirect should also be setup from the old URLs to the new URL.
Redirect added
Removed doxygen from disallow in robots.txt in r306949