[LLVMdev] how to compile a large project to LLVM IR?

Eli Bendersky
2015-06-25T12:57:12Z

On Wed, Jun 24, 2015 at 6:30 PM, Q Z <zhaoqian301 at gmail.com> wrote:

> Thank you for you nice answer. But I'am sorry, I find the question I
was
> asked is not what I really want. my situation is that I want to write a
> LLVM pass to check a large progress. what is the simplest way for me to
> make the progress become checkable?
>

Sorry, I don't understand what you're asking. What do you mean by
"progress" here?

Eli




>
> 2015-06-25 1:54 GMT+08:00 Pete Cooper <peter_cooper at apple.com>:
>
>>
>> On Jun 24, 2015, at 10:19 AM, Eli Bendersky <eliben at
google.com> wrote:
>>
>>
>>
>> On Wed, Jun 24, 2015 at 7:05 AM, Q Z <zhaoqian301 at gmail.com>
wrote:
>>
>>> Hello，I want to compile a large project(for example,Apache httpd)
to one
>>> .bc file. How can I do this? Can you give me some examples?
>>>
>>>
>> In general, if the codebase of a certain project is compilable by
>> Clang/LLVM, this should be possible, but the devil is in the details
(for
>> example - how is the standard library going to get compiled into that
.bc
>> file?)
>>
>> If you only care about the project itself and not things like the
>> standard library, then LTO is possible too.  Depends on the linker you
are
>> using, but Apple’s ld and I believe the gold linker both have
-save-temps
>> options which save the bit codes before/after optimization but
certainly
>> after linking.
>>
>> Cheers,
>> Pete
>>
>>
>> I suggest you take a look at the "NaCl ports" project (
>> https://code.google.com/p/naclports/
>>
<https://urldefense.proofpoint.com/v2/url?u=https-3A__code.google.com_p_naclports_&d=AwMFaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=Mfk2qtn1LTDThVkh6-oGglNfMADXfJdty4_bhmuhMHA&m=RfjvEJWweAkWHLneLw1ksvf1RoobZbEIUUVtXtJgYv4&s=RvO9OeVGsfCkE0U5HJQV_pwo1s2U1qoZg2Wx-gK19cs&e=>).
>> It has ready-made makefiles to compile a bunch of well known open
source
>> projects using the PNaCl toolchain, which is based on LLVM. Each file
is
>> compiled to IR and the LLVM linker is used to link them all together.
This
>> is a full solution, handling the standard libraries, and so on.
>>
>>
>> Eli
>>
>> _______________________________________________
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>>
>>
>>
>
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