llvm dev - Jul 2010 - [LLVMdev] Preserve debug information using 'llc -march=c'

Hi!

Since version 1.4 of LLVM it is possible to emit source line number
information to the LLVM-bytecode using llvm-gcc or llvm-g++ with the
'-g'-option. But if I use 'llc -march=c' to transform this
bytecode back to
sourcecode this information gets lost.

Is there a command line option for 'llc' which allows to keep
source-line-number information
or is there another easy way how I can do that ?

Thanks in advance
Martin
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On Wed, Jul 14, 2010 at 4:39 AM, Martin Rathgeber
<rathgeber.martin at googlemail.com> wrote:
> Hi!
>
> Since version 1.4 of LLVM it is possible to emit source line number
> information to the LLVM-bytecode using llvm-gcc or llvm-g++ with the
> '-g'-option. But if I use 'llc -march=c' to transform this
bytecode back to
> sourcecode this information gets lost.
>
> Is there a command line option for 'llc' which allows to keep
> source-line-number information
> or is there another easy way how I can do that ?
The CBackend (-march=c) does not emit debug info into regenerated C code.
Other backends (e.g. x86) does not loose debug info at -O0.
-
Devang