[LLVMdev] creating InvokeInst without branch locations

[John Criswell]

On 10/20/13 10:52 PM, edA-qa mort-ora-y wrote:
> Is it okay to pass null values to the destinations of
> InvokeInst::Create? I checked the code and it looks like it'd be okay,
> but the Create method doesn't make them optional, so I'm uncertain.
> Perhaps a specific Create function without destinations can be added to
> make it clear that it's okay (of course assuming you eventually call
> setNormal/UnwindDest).

I'm assuming that you want to create the invoke instruction and then 
fill in the destination basic blocks later.  Is that correct?

It should be okay to create an InvokeInst with "invalid" destinations so 
long as your pass fills them in with valid values before it finishes 
(otherwise, the LLVM verifier pass will complain).  I recommend using 
Undef values or a dummy basic block, though, instead of NULL values.  A 
dummy basic block would probably be best.

-- John T.
>
>
>
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20131021/7d8f36c2/attachment.html>