While using VSCode to develop LLVM, does using the generated compile_commands.json file to configure Intellisense give better results?
I've not tested it, but compile_commands is documented as being
supported in vscode using intellisense -
C/C++ extension FAQ.
However, personally I'd recommend you give clangd a try -
clangd - Visual Studio Marketplace
, It too requires the compile_commands.json file.