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

[Rafael Espíndola]

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.
>> >
>> >
>> >
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>> >
>
>