llvm dev - Nov 2002 - [LLVMdev] Fake Exit node

Is there a facility with which we may automagically create a "fake"
exit
node, one that is the target of all BasicBlocks ending in return.  This 
would be very helpful to IP dataflow analysis...

Dave

There is a pass "UnifyFunctionExitNodes()" (you can add it to
AnalysisUsage
of your pass) that does the trick.

-anand
----- Original Message -----
From: "David Crowe" <dcrowe at tremor.crhc.uiuc.edu>
To: <llvmdev at cs.uiuc.edu>
Sent: Friday, November 29, 2002 4:58 PM
Subject: [LLVMdev] Fake Exit node

> Is there a facility with which we may automagically create a
"fake" exit
> node, one that is the target of all BasicBlocks ending in return.  This
> would be very helpful to IP dataflow analysis...
>
> Dave
>
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://mail.cs.uiuc.edu/mailman/listinfo/llvmdev
>

On Fri, 29 Nov 2002, Anand Shukla wrote:
> There is a pass "UnifyFunctionExitNodes()" (you can add it to
AnalysisUsage
> of your pass) that does the trick.
Yup, just like Anand says, this pass will make it so that there is at most
one exit node from the function, which you can use for your analysis (it
will even tell you which BB that is too).  Note that a function may _not_
have an exit node (if it contains an infinite loop, for example), so be
aware of that, but otherwise it should work for you with no problem.

-Chris

> From: "David Crowe" <dcrowe at tremor.crhc.uiuc.edu>
> To: <llvmdev at cs.uiuc.edu>
> Sent: Friday, November 29, 2002 4:58 PM
> Subject: [LLVMdev] Fake Exit node
>
>
> > Is there a facility with which we may automagically create a
"fake" exit
> > node, one that is the target of all BasicBlocks ending in return. 
This
> > would be very helpful to IP dataflow analysis...
> >
> > Dave
> >
> > _______________________________________________
> > LLVM Developers mailing list
> > LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> > http://mail.cs.uiuc.edu/mailman/listinfo/llvmdev
> >
>
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://mail.cs.uiuc.edu/mailman/listinfo/llvmdev
>
-Chris

-- 
http://llvm.cs.uiuc.edu/
http://www.nondot.org/~sabre/Projects/