[llvm-dev] (no subject)

[Tobias Grosser via llvm-dev]

On Thu, Jul 6, 2017, at 12:11 PM, mats petersson via llvm-dev wrote:
> Would probably help a whole lot if you explained what error you are
> getting...

Also, this might be useful:

https://github.com/llvm-mirror/polly/blob/master/lib/CodeGen/PerfMonitor.cpp

Best,
Tobias

> 
> --
> Mats
> 
> On 6 July 2017 at 11:07, SHALINI JAIN via llvm-dev
> <llvm-dev at lists.llvm.org>
> wrote:
> 
> > Hi,
> >
> > I want to profile each loop in order to collect execution time. Currently
> > I inserted following timer instructions into LLVM IR Version3.4 and
> > successfully got the results.
> >
> > before loop:
> > In C:
> >          int t1=clock();
> >
> > Equilavent IR:
> >   %t1 = alloca i32, align 4
> >   %t2 = alloca i32, align 4
> >   %1 = call i64 @clock() #3
> >   %2 = trunc i64 %1 to i32
> >   store i32 %2, i32* %t1, align 4
> >
> > After loop:
> > In C:
> >          int t2=clock();
> >          printf("%f\n",((float)t2-t1)/CLOCKS_PER_SEC);
> >
> > Equivalent IR:
> > %3 = call i64 @clock() #3
> >   %4 = trunc i64 %3 to i32
> >   store i32 %4, i32* %t2, align 4
> >   %5 = load i32* %t2, align 4
> >   %6 = sitofp i32 %5 to float
> >   %7 = load i32* %t1, align 4
> >   %8 = sitofp i32 %7 to float
> >   %9 = fsub float %6, %8
> >   %10 = fdiv float %9, 1.000000e+06
> >   %11 = fpext float %10 to double
> >   %12 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([4 x i8]*
> > @.str, i32 0, i32 0), double %11)
> >
> >
> > I want to do the same in LLVM4.0. I tried inserted these got error.
> >
> > --
> > Regards
> > Shalini
> >
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> > llvm-dev at lists.llvm.org
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> >
> >
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