[LLVMdev] Compilation without optimization

[Tanu Sharma]

Thanks !!
 
But if i generate a .bc file like this and then run my pass over it like this :

opt -load /home/llvm-cvs/llvm/Debug/lib/LLVMHello.so -hello <helloprog.bc> class_prog.bc
 
Will the new .bc file (class_prog.bc) be also without optimizations ?opt also does some optimizations.Can I control them ?
 
Thanks
Tanu

Chris Lattner <sabre at nondot.org> wrote:
On Mon, 25 Apr 2005, Tanu Sharma wrote:

> Thanks for the reply.
>
> I wish to compile without optimizations ( the option being turned off ) 
> but still generate bytecode file.
>
> Options -S , -c removes optimizations but I also need .bc file to 
> experiment and use further.

Passing "-Wa,-disable-opt -Wl,-disable-opt" will disable *all* cleanup and 
optimizations done at the llvm level, leaving you with the truly horrible 
code that you desire :).

-Chris

> Chris Lattner wrote:
> On Sat, 23 Apr 2005, Tanu Sharma wrote:
>
>> I got very useful replies from dev list regarding my earlier question
>> but yet not able to determine block size. That I want in total size of a
>> block in a function in bytes and not just the number of
>> instructions.LLVM Tool gives most of the information e.g function bytes
>> etc....but not individual block.
>
> If you want the size in machine code bytes, you are going to have to
> generate an .s file and count the instructions.
>
> -chris
>
>> Chris Lattner wrote:
>> On Fri, 22 Apr 2005, Tanu Sharma wrote:
>>
>>> Actually I started with hello.cpp povided as an example pass and
>>> modified and made my pass which does randomization. I have been working
>>> on it and running over programs and it always worked fine but now lately
>>> i had checked out a newer version (llvm)which i believed was working
>>> fine too but now as i did some modifications and tried to compile my
>>> pass i got these errors.
>>
>> So you get the errors while compiling the pass? Did you recently upgrade
>> your system GCC? It looks like it is configured wrong or is somehow
>> broken.
>>
>>> Also I have yet not found a simple way to calculate basic block size in
>>> a function.There are tools that give me function size in bytes etc etc
>>> ....but not of basic block.I got reply that I have to see what my block
>>> does and then calculate size...what does that mean ? iterating over
>>> instructions and add the size of the instructions ?how do i determine
>>> that ?
>>
>> Again, what "size" are you looking for? If you just want to figure out
>> how many llvm instructions are in it, BB->size() should do the trick.
>>
>> -Chris
>>
>>> Chris Lattner wrote:
>>> On Thu, 21 Apr 2005, Tanu Sharma wrote:
>>>> I am trying to rum my pass (.cpp file) and I am getting the following error.
>>>
>>> Can you give a little more context about what you're doing?
>>>
>>> -Chris
>>>
>>>
>>>> ----------------------------------------------------------------------------------------------------------------
>>>>
>>>> g++: /usr/lib/gcc/i386-redhat-linux/3.4.2/../../../crti.o: No such file or directory
>>>> g++: /usr/lib/gcc/i386-redhat-linux/3.4.2/crtbeginS.o: No such file or directory
>>>> g++: /usr/lib/gcc/i386-redhat-linux/3.4.2/crtendS.o: No such file or directory
>>>> g++: /usr/lib/gcc/i386-redhat-linux/3.4.2/../../../crtn.o: No such file or directory
>>>> ---------------------------------------------------------------------------------------------------------------
>>>>
>>>> It seems the error just appreared from nowhere.Earlier it was working fine.I had also checked out the latest version from cvs sometime back but feel I worked on that for sometime before this appeared.
>>>>
>>>> How can I fix it?Is it changing llvm parameters for c++ or requires patch or something fom linux?
>>>>
>>>> Thanks
>>>>
>>>> - T
>>>>
>>>> __________________________________________________
>>>> Do You Yahoo!?
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>>>
>>> -Chris
>>>
>>>
>>
>> -Chris
>>
>>
>
> -Chris
>
>

-Chris

-- 
http://nondot.org/sabre/
http://llvm.cs.uiuc.edu/

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