llvm dev - Sep 2013 - [LLVMdev] (no subject)

Hi all,
I was interested in knowing which of the passes spends the most of the time
compiling the dns server BIND.With the -CC option I selected clang as my
compiler and, as I was expecting, the compilation gave me no problems.Now I have
a question, is there any way to set an option similiar to
"-time-passes" to clang in order to get those information I was
interested in?Or do you think there is another equivalent way to do that?
Thank you in advance,
Niko 		 	   		  
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To use options like "-time-passes" and "-stats" you need to
prefix
them with "-mllvm":

clang -mllvm -time-passes -O3 test.c -o /dev/null

Note that I believe you need asserts enabled or some other build
configuration for this to work,
the timing code is disabled in fully release builds IIRC.

Hope this helps!

~Will

On Thu, Sep 12, 2013 at 11:50 AM, Niko Zarzani <koni10 at hotmail.it>
wrote:
> Hi all,
>
> I was interested in knowing which of the passes spends the most of the time
> compiling the dns server BIND.
> With the -CC option I selected clang as my compiler and, as I was
expecting,
> the compilation gave me no problems.
> Now I have a question, is there any way to set an option similiar to
> "-time-passes" to clang in order to get those information I was
interested
> in?
> Or do you think there is another equivalent way to do that?
>
> Thank you in advance,
>
> Niko
>
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>

I tried it on a simple file test.c (as you did) but actually clang does not show
me any output.
In addition I tried to set the CFLAGS specifying the -mllvm -time-passes
options. However I still have anything about the time passes informations in the
output and I also get this warning during the build with make:clang: warning:
argument unused during compilation: '-mllvm -time-passes'Maybe the
warning is due to the fact that the timing code is disabled, but I am not sure
since it doesn't seem to work on a simple file.
Have I done something wrong or am I missing something? Do you have any other
suggestion?
I really appreciated your help!Thank you in advance,
Niko
> Date: Thu, 12 Sep 2013 12:35:44 -0500
> Subject: Re: [LLVMdev] (no subject)
> From: willdtz at gmail.com
> To: koni10 at hotmail.it
> CC: llvmdev at cs.uiuc.edu
> 
> To use options like "-time-passes" and "-stats" you
need to prefix
> them with "-mllvm":
> 
> clang -mllvm -time-passes -O3 test.c -o /dev/null
> 
> Note that I believe you need asserts enabled or some other build
> configuration for this to work,
> the timing code is disabled in fully release builds IIRC.
> 
> Hope this helps!
> > ~Will> 
> On Thu, Sep 12, 2013 at 11:50 AM, Niko Zarzani <koni10 at hotmail.it>
wrote:
> > Hi all,
> >
> > I was interested in knowing which of the passes spends the most of the
time
> > compiling the dns server BIND.
> > With the -CC option I selected clang as my compiler and, as I was
expecting,
> > the compilation gave me no problems.
> > Now I have a question, is there any way to set an option similiar to
> > "-time-passes" to clang in order to get those information I
was interested
> > in?
> > Or do you think there is another equivalent way to do that?
> >
> > Thank you in advance,
> >
> > Niko
> >
> > _______________________________________________
> > LLVM Developers mailing list
> > LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> > http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
> >
 		 	   		  
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