llvm dev - Mar 2010 - [LLVMdev] Aborting a pass

Hi,

What's the proper way to abort a pass if something goes wrong (e.g.,  
in the pass's constructor)? Do I simply call abort()? I looked through  
the existing passes but didn't see an example of this. Thanks,

Trevor

On Mar 1, 2010, at 11:04 AM, Trevor Harmon wrote:
> What's the proper way to abort a pass if something goes wrong (e.g.,
> in the pass's constructor)? Do I simply call abort()?
Calling abort() causes a stack dump to the console, which is good for  
serious errors, but overkill for most other types of error situations,  
such as a command-line parameter that the user forgot to add. For  
these situations, I'm printing an informative error message to errs()  
and then calling exit(-1). I'm not sure if that's the best approach,  
but it seems to coax the expected behavior out of LLVM.

Trevor

On Mar 11, 2010, at 12:49 PM, Trevor Harmon wrote:
> On Mar 1, 2010, at 11:04 AM, Trevor Harmon wrote:
> 
>> What's the proper way to abort a pass if something goes wrong
(e.g.,
>> in the pass's constructor)? Do I simply call abort()?
> 
> Calling abort() causes a stack dump to the console, which is good for  
> serious errors, but overkill for most other types of error situations,  
> such as a command-line parameter that the user forgot to add. For  
> these situations, I'm printing an informative error message to errs()  
> and then calling exit(-1). I'm not sure if that's the best
approach,
> but it seems to coax the expected behavior out of LLVM.
> 
You can also use the "llvm_report_error" (et al) commands in
llvm/Support/ErrorHandling.h. They will act like exit(), but print error
messages.

-bw