[llvm-dev] Passing llvm option -mem2reg to clang

[Syed Rafiul Hussain via llvm-dev]

I have used the following command for my pass (without -mem2reg):

clang -Xclang -load -Xclang MYPASS.so -c ../../tests/test1.c


For mem2reg, I tried the following:

clang -mllvm -mem2reg -Xclang -load -Xclang MYPASS.so -c ../../tests/test1.c




On Mon, Mar 21, 2016 at 9:26 PM, Mehdi Amini <mehdi.amini at apple.com> wrote:
>
>> On Mar 21, 2016, at 6:23 PM, Syed Rafiul Hussain <rafiul1906 at gmail.com> wrote:
>>
>> I have my own llvm pass which requires mem2reg.  It worked fine with
>> opt. However, I was trying to make it work with clang as I needed it
>> to run some spec cpu benchmarks.
>>
>> Is there any way that I can mention mem2reg (PromotePass) pass as a
>> pre-requisite in my own pass's implementation?
>
> How are you inserting your pass in the pipeline setup by clang?
> You should be able to insert mem2reg before the same way.
> Also mem2reg is ran by clang when optimizations are enabled, depending on what your pass is doing it may be a matter of inserting it at the right place.
>
> --
> Mehdi
>
>
>>
>>
>> On Mon, Mar 21, 2016 at 9:01 PM, Mehdi Amini <mehdi.amini at apple.com> wrote:
>>> Hi,
>>>
>>> You can't schedule passes from the command line using clang, only `opt` has this ability (AFAIK).
>>>
>>> If you tell us what is your use-case, we may be able to point you to an alternative solution.
>>>
>>> --
>>> Mehdi
>>>
>>>> On Mar 21, 2016, at 5:52 PM, Syed Rafiul Hussain via llvm-dev <llvm-dev at lists.llvm.org> wrote:
>>>>
>>>> Hi,
>>>>
>>>> I was trying to pass llvm option -mem2reg to clang using -mllvm and I
>>>> found the following error:
>>>>
>>>> clang (LLVM option parsing): Unknown command line argument '-mem2reg'.
>>>> Try: 'clang (LLVM option parsing) -help'
>>>> clang (LLVM option parsing): Did you mean '-debug'?
>>>>
>>>> I would appreciate if anyone could help me.
>>>>
>>>> --
>>>> Syed Rafiul Hussain
>>>> _______________________________________________
>>>> LLVM Developers mailing list
>>>> llvm-dev at lists.llvm.org
>>>> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>>>
>>
>>
>>
>> --
>> Rafi
>



-- 
Rafi