llvm dev - Feb 2021 - How can I fix the error "Inline asm not supported [...] because we don't have an asm parser for this target"?

Hello.
     I am trying to build against the latest LLVM source from GitHub (from Jan
23 2021) my
research processor back end, which is mostly inspired from the BPF LLVM back
end. While
trying this, I got this error that I didn't encounter until now:
      <<LLVM ERROR: Inline asm not supported by this streamer because we
don't have an asm
parser for this target"
       ...
       llvm::AsmPrinter::emitInlineAsm(llvm::StringRef, llvm::MCSubtargetInfo
const&,
llvm::MCTargetOptions const&, llvm::MDNode const*,
llvm::InlineAsm::AsmDialect) const
llvm/lib/CodeGen/AsmPrinter/AsmPrinterInlineAsm.cpp:156:9>>

     Again, this is the first time I encounter this error. It is true I am using
quite a
bit inline assembly expressions to print some special strings which actually do
not
represent assembler instructions of the processor.

   My back end is inspired heavily from the BPF back end but in 2015, when I
started my
back end, BPF did not have an AsmParser folder. Do you recommend to get inspired
from the
the current AsmParser folder of the BPF back end?
   Any suggestion is warmly welcome.

   If ever, my LLVM back end can be found here: 
https://sites.google.com/site/alexsusu/myfilecabinet/Connex_be.zip .

   Just to mention, I found some documentation about AsmParser from around 2012:
https://www.embecosm.com/appnotes/ean10/ean10-howto-llvmas-1.0.html#idp86952 .

   Thank you very much,
     Alex

Hello.
     Can somebody please help me with the error reported in this thread?
     It seems that some changes were made from LLVM 8 (from 2019) to the current
LLVM,
such that there is no longer a default(?) MCTargetAsmParser and I need to
implement one in
my back end.

     There is one more issue that I wrote of in the previous message also: I
create inline
assembly expressions in the back end to print some special strings (like
"N/M", which is
an arithmetic expression), which actually do not represent assembler
instructions of the
processor. Therefore, I guess I should have an Asm Parser that should not bother
to parse
the arithmetic expression strings because they do not contains assembler
mnemonics.

   Thank you very much,
     Alex

On 2/21/2021 10:08 PM, Alex Susu wrote:
>    Hello.
>      I am trying to build against the latest LLVM source from GitHub (from
Jan 23 2021) my
> research processor back end, which is mostly inspired from the BPF LLVM
back end. While
> trying this, I got this error that I didn't encounter until now:
>       <<LLVM ERROR: Inline asm not supported by this streamer because
we don't have an asm
> parser for this target"
>        ...
>        llvm::AsmPrinter::emitInlineAsm(llvm::StringRef,
llvm::MCSubtargetInfo const&,
> llvm::MCTargetOptions const&, llvm::MDNode const*,
llvm::InlineAsm::AsmDialect) const
> llvm/lib/CodeGen/AsmPrinter/AsmPrinterInlineAsm.cpp:156:9>>
> 
>      Again, this is the first time I encounter this error. It is true I am
using quite a
> bit inline assembly expressions to print some special strings which
actually do not
> represent assembler instructions of the processor.
> 
>    My back end is inspired heavily from the BPF back end but in 2015, when
I started my
> back end, BPF did not have an AsmParser folder. Do you recommend to get
inspired from the
> the current AsmParser folder of the BPF back end?
>    Any suggestion is warmly welcome.
> 
>    If ever, my LLVM back end can be found here: 
> https://sites.google.com/site/alexsusu/myfilecabinet/Connex_be.zip .
> 
>    Just to mention, I found some documentation about AsmParser from around
2012:
>
https://www.embecosm.com/appnotes/ean10/ean10-howto-llvmas-1.0.html#idp86952 .
> 
>    Thank you very much,
>      Alex