Currently, LLVM releases are distributed under the University of Illinois Open Source License, an OSI-approved license.
However, LLVM version 8 will be the last release under that license as LLVM is moving to a new license structure. You can find more details about this in the developer's policy.
LLVM provides extensive documentation in HTML form, which is available in the source download and online.
Date | Version | Download | Release Notes | Documentation |
Current | Git | via Git | release notes | docs |