[LLVMdev] Why some registered passes are not available through opt?

[Dmitry N. Mikushin]

Hi Duncan,

Is it correct that opt does not understand codegen passes, but llc
understands both analysis/transformation and codegen passes? I would
like to modify bugpoint to work on this end.

Thanks,
- D.

2012/6/29 Duncan Sands <baldrick at free.fr>:
> Hi Dima,
>
>> I'm trying to understand why opt tool does not know some of the
>> registered passes, for example, -targetpassconfig, -gc-lowering,
>> -unreachableblockelim, -unreachableblockelim, -stack-protector,
>> -machinemoduleinfo. This prevents me from using bugpoint to reduce the
>> crash in backend. As I understand, they should be registered and
>> available through the command line in the same way as all other
>> passes, shouldn't they?
>
> these are codegen passes not IR passes, and thus are available from llc
> not opt.
>
> Ciao, Duncan.
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