llvm dev - Apr 2011 - [LLVMdev] opt -dot-cfg

I use "opt -dot-cfg sample.bc" command to view cfg, but I encountered
the
following warning.

WARNING: You're attempting to print out a bitcode file.
This is inadvisable as it may cause display problems. If
you REALLY want to taste LLVM bitcode first-hand, you
can force output with the `-f' option.

I see unmeaning thing when use -f , in additinal I've installed graphvis
software,
can anyone help me?
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You need to tell opt where to put the resultant output file. It's still
going to do that even with the graphvis display stuff. "opt -dot-cfg
sample.bc -o sample.out.bc" or something like that.

-Jim

On Apr 4, 2011, at 12:57 PM, neda 8664 wrote:
>   I use "opt -dot-cfg sample.bc" command to view cfg, but I
encountered the following warning.
> 
> WARNING: You're attempting to print out a bitcode file.
> This is inadvisable as it may cause display problems. If
> you REALLY want to taste LLVM bitcode first-hand, you
> can force output with the `-f' option.
> 
> I see unmeaning thing when use -f , in additinal I've installed
graphvis software,
> can anyone help me? _______________________________________________
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