Self-hosting D compiler -- Coming Real Soon Now(tm)

[Sergey Korshunoff via Digitalmars-d]

But we want to get a C source from a D source. It is unpossible now to
build a current LDC using LLVM 3.0? Anyway, there is some attemps to
ressurect this backend
http://lists.cs.uiuc.edu/pipermail/llvmdev/2014-April/071968.html
http://lists.cs.uiuc.edu/pipermail/llvmdev/2014-April/071928.html



2014-09-14 3:29 GMT+04:00, Dan Olson via Digitalmars-d
<digitalmars-d at puremagic.com>:
> "Kai Nacke" <kai at redstar.de> writes:
>
>> On Friday, 12 September 2014 at 10:06:10 UTC, Sergey Korshunoff via
>> Digitalmars-d wrote:
>>>
>>> LDC and LLVM allow to comvert a D source code to C source (and may
>>> be
>>> to C++). What wrong with this solution?
>>
>> There's nothing wrong with this solution. I think about this as a way
>> to bootstrap LDC without requiring another D compiler.
>>
>> Regards,
>> Kai
>
> This seemed like a fun solution but I found out the LLVM C backend was
> removed with LLVM 3.1.  There is also a cpp backend, but is different.
> Cpp target generates C++ code using LLVM API that will rebuild LLVM IR.
> I tried it on a simple D program to be sure and result is just IR.
>
> $ ldc2 -output-ll hello.d
> $ llc -march=cpp hello.ll -o output.cpp
>
> and output.cpp has to be linked with some llvm libraries.  Also,
> output.cpp needed some hand edits to get it to work despite the
> "// Generated by llvm2cpp - DO NOT MODIFY!"  warning at the top.
>
> when run output.cpp just prints IR (essentially same as hello.ll).
>
> http://stackoverflow.com/questions/11597664/llvm-cpp-backend-does-it-replace-c-backend
>