llvm dev - Jun 2020 - Function name demangling in llvm ir

(though, usual caveat: you /usually/ shouldn't be doing that - instead
relying only on whatever semantics the IR actually carries, rather
than implying extra semantics based on the demangled name)

On Wed, Jun 24, 2020 at 12:48 PM Johannes Doerfert via llvm-dev
<llvm-dev at lists.llvm.org> wrote:
>
> I have not tried it but maybe
>
> `std::string llvm::demangle(const std::string &MangledName)`
>
> in `llvm/Demangle/Demangle.h`
>
> is already what you want.
>
>
>
> On 6/24/20 2:10 PM, sangeeta chowdhary via llvm-dev wrote:
>
> Hello,
>
> I am doing some program analysis with C++ programs. I need to check if some
> particular function is called in the program, for that I need the name of
> the function being called in the call instruction. Since C++ mangles the
> name of the function, I need a way to demangle the function name in llvm
> IR. Is there any way to achieve that in llvm pass?
>
> Regards,
> Sangeeta
>
>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev

Any particular reason to avoid demangling?

On Wed, Jun 24, 2020 at 4:20 PM David Blaikie <dblaikie at gmail.com>
wrote:
> (though, usual caveat: you /usually/ shouldn't be doing that - instead
> relying only on whatever semantics the IR actually carries, rather
> than implying extra semantics based on the demangled name)
>
> On Wed, Jun 24, 2020 at 12:48 PM Johannes Doerfert via llvm-dev
> <llvm-dev at lists.llvm.org> wrote:
> >
> > I have not tried it but maybe
> >
> > `std::string llvm::demangle(const std::string &MangledName)`
> >
> > in `llvm/Demangle/Demangle.h`
> >
> > is already what you want.
> >
> >
> >
> > On 6/24/20 2:10 PM, sangeeta chowdhary via llvm-dev wrote:
> >
> > Hello,
> >
> > I am doing some program analysis with C++ programs. I need to check if
> some
> > particular function is called in the program, for that I need the name
of
> > the function being called in the call instruction. Since C++ mangles
the
> > name of the function, I need a way to demangle the function name in
llvm
> > IR. Is there any way to achieve that in llvm pass?
> >
> > Regards,
> > Sangeeta
> >
> >
> > _______________________________________________
> > LLVM Developers mailing list
> > llvm-dev at lists.llvm.org
> > https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
> >
> > _______________________________________________
> > LLVM Developers mailing list
> > llvm-dev at lists.llvm.org
> > https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
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On Wed, Jun 24, 2020 at 1:26 PM sangeeta chowdhary
<sangitachowdhary at gmail.com> wrote:
>
> Any particular reason to avoid demangling?
It's not part of the semantics of LLVM IR - so optimization should not
rely on it (different mangling schemes might be used on different
platforms - breaking the analysis/optimizations based on them - other
optimizations might not preserve the properties you're looking
for/assuming exist because of the mangled name, etc)
>
> On Wed, Jun 24, 2020 at 4:20 PM David Blaikie <dblaikie at gmail.com>
wrote:
>>
>> (though, usual caveat: you /usually/ shouldn't be doing that -
instead
>> relying only on whatever semantics the IR actually carries, rather
>> than implying extra semantics based on the demangled name)
>>
>> On Wed, Jun 24, 2020 at 12:48 PM Johannes Doerfert via llvm-dev
>> <llvm-dev at lists.llvm.org> wrote:
>> >
>> > I have not tried it but maybe
>> >
>> > `std::string llvm::demangle(const std::string &MangledName)`
>> >
>> > in `llvm/Demangle/Demangle.h`
>> >
>> > is already what you want.
>> >
>> >
>> >
>> > On 6/24/20 2:10 PM, sangeeta chowdhary via llvm-dev wrote:
>> >
>> > Hello,
>> >
>> > I am doing some program analysis with C++ programs. I need to
check if some
>> > particular function is called in the program, for that I need the
name of
>> > the function being called in the call instruction. Since C++
mangles the
>> > name of the function, I need a way to demangle the function name
in llvm
>> > IR. Is there any way to achieve that in llvm pass?
>> >
>> > Regards,
>> > Sangeeta
>> >
>> >
>> > _______________________________________________
>> > LLVM Developers mailing list
>> > llvm-dev at lists.llvm.org
>> > https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>> >
>> > _______________________________________________
>> > LLVM Developers mailing list
>> > llvm-dev at lists.llvm.org
>> > https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev