llvm dev - Jul 2013 - [LLVMdev] Require Grammar for converting C to IR

Seems that Vijay is asking about converting C program to LLVM IR


On Mon, Jul 29, 2013 at 9:26 PM, Eli Bendersky <eliben at google.com>
wrote:
>
>
>
> On Sat, Jul 27, 2013 at 9:02 AM, Vijay Daultani <vijay.daultani at
gmail.com>wrote:
>
>> Respected Sir/Madam,
>>
>> As I was developing some part of compiler for a project. I require
grammar
>> (BNF or EBNF) for converting the C code in the IR as it is not been
>> mentioned any where over your official website.
>>
>> Awaiting for your help.
>>
>>
> Hi Vijay,
>
> If you are asking about compiling C into LLVM IR - take a look at Clang:
> http://clang.llvm.org/. Clang is a C, C++ and ObjC front-end for LLVM.
>
> Eli
>
>
>
>
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>

-- 
Warm Regards
--Dev
OpenPegasus Developer/Committer

(\__/)
(='.'=) This is Bunny. Copy and paste bunny
(")_(") to help him gain world domination.
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> From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at
cs.uiuc.edu]
> On Behalf Of Devchandra L Meetei
> Subject: Re: [LLVMdev] Require Grammar for converting C to IR
> > If you are asking about compiling C into LLVM IR - take a look at
Clang:
> > http://clang.llvm.org/. Clang is a C, C++ and ObjC front-end for LLVM.
> Seems that Vijay is asking about converting C program to LLVM IR
Which is exactly what clang does, hence the previous answer from Eli.

 - Chuck

On 29 July 2013 20:41, Caldarale, Charles R <Chuck.Caldarale at
unisys.com>wrote:
> > Seems that Vijay is asking about converting C program to LLVM IR
>
> Which is exactly what clang does, hence the previous answer from Eli.
>
We seem to have a communication breakdown. My quick answer was also "look
at Clang", though it seems they're asking for something different...

As far as I know, there isn't any C/C++ EBNF -> LLVM IR parsers
available,
as there aren't crazy enough folks out there... ;)

A few hints:
 * If you're looking for the EBNF description of C/C++, google for "C++
ebnf" and you'll find plenty.
 * If you need a compiler for C/C++, look at Clang, and you'll find a great
implementation.
 * If you're looking for a tool that gets a C/C++ grammar and transforms
into a parser (like bison), you may find examples at the Gnu Bison docs.
You can than use that to convert your AST to LLVM IR, but you'll have to
hand-code the bridge yourself.

cheers,
--renato
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