LLVM is written in C++ ?

[Jakob Jenkov via digitalmars-d-ldc]

Hi,

I have a background in Java, so please forgive me for not knowing 
this:

Is LLVM written in C++ ? If I was to use LLVM e.g. for an LLVM 
based D compiler (you already made one, I know), would my code 
have to be C++ ?

I looked at the LLVM project shortly, and it looks really 
interesting, even though I don't understand it all at this point.

 From what I gather, you can compile any language to the LLVM 
assembly language, and then compile the LLVM assembly language to 
any platform after that (using standard compilers). Is that 
correct?