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?

On Wednesday, 16 December 2015 at 09:27:54 UTC, Jakob Jenkov wrote:
> 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?

Yes llvm is wirtten in c++. And yes you can compile any programming language to llvm ir.

On Wednesday, 16 December 2015 at 09:27:54 UTC, Jakob Jenkov wrote:
> 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++ ?

You might want to take a look at:

https://github.com/SDC-Developers/SDC

> 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?

LLVM is geared towards C-like languages. It has added some adjustments to enable compilation for specific non-C languages, like special calling conventions. But it isn't suitable for all kinds of language semantics, no.

On Wednesday, 16 December 2015 at 12:22:30 UTC, Ola Fosheim Grøstad wrote:
>
> LLVM is geared towards C-like languages. It has added some adjustments to enable compilation for specific non-C languages, like special calling conventions. But it isn't suitable for all kinds of language semantics, no.

LLVM IR is just like assembly ... If your language compiles to machine code as it must one way or the other you can compile it to llvm-ir

On Wednesday, 16 December 2015 at 12:31:01 UTC, Stefan Koch wrote:
> LLVM IR is just like assembly ... If your language compiles to machine code as it must one way or the other you can compile it to llvm-ir

LLVM IR is not just like assembly. It has builtin semantics geared towards specific languages.

On Wednesday, 16 December 2015 at 09:27:54 UTC, Jakob Jenkov wrote:
> 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?

Hi!

If you are using Java you may have a look at this article: https://theantlrguy.atlassian.net/wiki/display/ANTLR3/LLVM

A possibility not yet mentioned is that LLVM also has a C interface. You can create JNI bindings for it. Not sure if somebody has already done it.

Regards,
Kai