llvm dev - Sep 2016 - LLVM-CBE C Backend conversions

Hello,

I have a quick question about the LLVM-CBE ( C Backend ).  I know it's been
deprecated and removed from the LLVM package for quite some time now but I am
hoping that someone on this mailer still knows something about it or can point
me to the right place.

I am trying to convert a C++ file/application to IR and back to C ( or C++ if
possible ).  I am forced to take this approach due to the restrictions placed on
me by some 3rd party tools that are also involved.  I've been playing around
with LLVM 3.7 & the CBE because there is some community support for this
version and I have successfully managed to convert a C file/program to IR and
back again.  However the C backend fails to generate proper/compile-able code
when trying to convert a C++ file to IR and then back to C; I get a number of
undeclared variables at compile time (not link time).  Judging by the generated
C output and the error produced it 'looks' like the CBE is at fault.

So my question is, Can the LLVM-CBE tool support the conversion back to C code
when you feed it IR generated from a C++ file/code ?  Has anyone had any success
with this?  What are some of the common problems?  Any other advice or guidance
on how to achieve this would be greatly appreciated.

Thanks in advance for the help!
Adam Parsons
Cisco Systems, Inc.





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