[LLVMdev] LLVM fails for inline asm with Link Time Optimization

[Ashish Saxena]

It is failing at link time . Examples are what I have given above. There is
an compiler option -mllvm --x86-asm-syntax=intel. Is there something
similar for linker which I can provide via -plugin-opt ?

On Fri, Mar 27, 2015 at 9:31 PM, Rafael Espíndola <
rafael.espindola at gmail.com> wrote:

> At which stage is this failing? Can you provide an example and commands?
>
> Looks like the information about the use of intel syntax is being
> dropped along the way.
>
> On 27 March 2015 at 11:40, Ashish Saxena <ashishcseitbhu at gmail.com> wrote:
> > Ah , I thought that there is issue while parsing inline asm in function
> > bodies , here are some of instruction where it cribs . Can you make out
> > something of it ?
> >
> > I am going to try out -no-integrated-as option . Not sure if it will
> help ?
> >
> > LLVM ERROR: Error parsing inline asm
> >
> > 1><inline asm>:1:17 : error 0: unexpected token in argument list
> >
> > 1>        mov ebx, dword ptr 16(%esp)
> >
> > 1>                       ^
> >
> > 1><inline asm>:2:17 : error 0: unexpected token in argument list
> >
> > 1>        mov edi, dword ptr 24(%esp)
> >
> > 1>                       ^
> >
> > 1><inline asm>:3:17 : error 0: unexpected token in argument list
> >
> > 1>        mov esi, dword ptr 28(%esp)
> >
> > 1>                       ^
> >
> > 1><inline asm>:4:21 : error 0: invalid token in expression
> >
> > 1>        movq mm1, [edi+ebx-$8]
> >
> > 1>                           ^
> >
> > 1><inline asm>:5:12 : error 0: invalid operand for instruction
> >
> > 1>        pxor mm0, mm0
> >
> >
> > Thanks
> >
> > Ashish
> >
> >
> > On Fri, Mar 27, 2015 at 8:21 PM, Rafael Espíndola
> > <rafael.espindola at gmail.com> wrote:
> >>
> >> If you are getting a parse error it is very likely a different bug. In
> >> that bug the issue is that we don't parse the function bodies to find
> >> if some inline in them defines (or uses) a given symbol.
> >>
> >> On 26 March 2015 at 13:30, Ashish Saxena <ashishcseitbhu at gmail.com>
> wrote:
> >> > Thanks for response Francois . Do you have any pointers on what can be
> >> > the
> >> > issue here or something I can try out. I saw similar active bug in
> llvm
> >> > database
> >> >
> >> > https://llvm.org/bugs/show_bug.cgi?id=5623
> >> >
> >> > Thanks
> >> > Ashish
> >> >
> >> > On Thu, Mar 26, 2015 at 10:52 PM, Francois Pichet <
> pichet2000 at gmail.com>
> >> > wrote:
> >> >>
> >> >>
> >> >>
> >> >> On Wed, Mar 25, 2015 at 4:47 PM, Ashish Saxena
> >> >> <ashishcseitbhu at gmail.com>
> >> >> wrote:
> >> >>>
> >> >>> Hi ,
> >> >>>     I am trying to enable link time optimization for my projects.
> Few
> >> >>> of
> >> >>> them has inline assembly which works perfectly with clang/llvm but
> on
> >> >>> enabling LTO I get following error
> >> >>>
> >> >>> LLVM ERROR: Error parsing inline asm
> >> >>>
> >> >>> <inline asm>:103:2 : error 0: unknown use of instruction mnemonic
> >> >>> without
> >> >>> a size suffix
> >> >>> <inline asm>:104:16 : error 0: invalid operand for instruction
> >> >>> <inline asm>:106:17 : error 0: unexpected token in argument list
> >> >>>
> >> >>> & so on
> >> >>>
> >> >>> Is this a known issue ? Any workaround for this ?
> >> >>
> >> >>
> >> >>
> >> >> My experience is that LTO doesn't break inline assembly.
> >> >
> >> >
> >> >
> >> > _______________________________________________
> >> > 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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