Manual LLVM Installation
Note
The LLVM installer does not support installing different versions of
LLVM.
If there is already some LLVM version installed into
C:\Program Files\LLVM\* this installation must be copied to some
temporary folder, and then can be copied back into
C:\Program Files\LLVM\other-LLVM-version after the installation
has finished.
- Download LLVM (version - 13.0.0) from github.com/LLVM version 13.0.0 <https://github.com/llvm/llvm-project/releases/tag/llvmorg-13.0.0>`_ from the project’s GitHub release page.
- Copy the existing LLVM installation to some temporary directory. 
- Remove the LLVM installation directory. 
- Run the installer. Choose - C:\Program Files\LLVM\13.0.0as installation directory Do not add LLVM to- PATH.
- Copy the previous LLVM installations back to the original place. 
