[llvm-dev] [cfe-dev] lli: LLVM ERROR: Cannot select: X86ISD::WrapperRIP TargetGlobalTLSAddress:i64

[Alex Denisov via llvm-dev]

I should have mentioned that I run it on OS X and i doesn’t work =\
IR also attached.

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> On 7 Feb 2017, at 17:19, Gaetano Checinski <gaetano.checinski at gmail.com> wrote:
> 
> > I’ve seen the same problem, but didn’t find solution back then.
> > I can give a hint that it is related to a thread local storage (notice TLS in the name).
> >
> > The same result can be reproduced by this simple program:
> >
> >    thread_local int x = 0;
> >    int main() {
> >      return 0;
> >    }
> >
> >When compiled into IR it produces similar error:
> >
> >LLVM ERROR: Cannot select: t19: i64 = X86ISD::WrapperRIP TargetGlobalTLSAddress:i64<i32* @x> 0 [TF=19]
> >  t18: i64 = TargetGlobalTLSAddress<i32* @x> 0 [TF=19]
> >In function: _ZTW1x
> 
> interestingly this works on my machine.
> 
> llvm-ir attached
> 
> 
> 
> 
> 2017-02-07 15:31 GMT+00:00 Alex Denisov <1101.debian at gmail.com>:
> I’ve seen the same problem, but didn’t find solution back then.
> I can give a hint that it is related to a thread local storage (notice TLS in the name).
> 
> The same result can be reproduced by this simple program:
> 
>     thread_local int x = 0;
>     int main() {
>       return 0;
>     }
> 
> When compiled into IR it produces similar error:
> 
> LLVM ERROR: Cannot select: t19: i64 = X86ISD::WrapperRIP TargetGlobalTLSAddress:i64<i32* @x> 0 [TF=19]
>   t18: i64 = TargetGlobalTLSAddress<i32* @x> 0 [TF=19]
> In function: _ZTW1x
> 
> > On 7 Feb 2017, at 16:13, Mehdi Amini via cfe-dev <cfe-dev at lists.llvm.org> wrote:
> >
> > + LLVM-dev (clang is mostly about the frontend and this is a backend failure), you may have more change to get an answer.
> >
> >> On Feb 6, 2017, at 5:49 AM, Gaetano Checinski via cfe-dev <cfe-dev at lists.llvm.org> wrote:
> >>
> >> Running the following code with clang++ -S -emit-llvm main.cpp && lli main.ll on Linux(Debian)
> >>
> >> #include <future>
> >>
> >>
> >>
> >> int main () {
> >>
> >>
> >> return std::async([]{return 1;}).get();
> >> }
> >> fails to run on lli due to the following error:
> >>
> >> LLVM ERROR: Cannot select: 0xd012e0:
> >>
> >>      i64
> >> = X86ISD::WrapperRIP TargetGlobalTLSAddress:i64<i8** @_ZSt15__once_callable> 0 [TF=10]
> >>
> >>
> >>
> >> 0xd020c0: i64 = TargetGlobalTLSAddress<i8** @_ZSt15__once_callable> 0 [TF=10]
> >> In function: _ZSt9call_onceIMNSt13__future_base13_State_baseV2EFvPSt8functionIFSt10unique_ptrINS0_12_Result_baseENS4_8_DeleterEEvEEPbEJPS1_S9_SA_EEvRSt9once_flagOT_DpOT0_
> >> Questions:
> >>
> >> What does it mean?
> >>
> >> Are there any compiler-flags that fix this problem?
> >>
> >> what specific features is libstdc++ using that cause this issue ?
> >>
> >> How does my problem relate to Bug 21431 ?
> >>
> >> The motivation behind this questions is to understand the differences between libc++ and libstdc++ that leads to this specific error message (on Linux) in llvm's orcjit.
> >>
> >>
> >>
> >> ps.: i've also asked this question in stackoverflow
> >>
> >>
> >>
> >>
> >>  Sent with Mailtrack
> >>
> >> _______________________________________________
> >> cfe-dev mailing list
> >> cfe-dev at lists.llvm.org
> >> http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-dev
> >
> > _______________________________________________
> > cfe-dev mailing list
> > cfe-dev at lists.llvm.org
> > http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-dev
> 
> 
> <main.ll>