llvm dev - Apr 2011 - [LLVMdev] help

Hi,

We are trying to do build a pass with constant propagation and graph
restructuring.

We are not able to find a suitable function for basic block cloning. We have
found CloneBasicBlock function but it includes the phi of the original block
in the replicated block. We don't want phi of original block in the
replicated basic block.

Also we need to change the successor and predecessor of the replicated basic
block. We are also not able to do that.


Regards
Vikash Kumar.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.llvm.org/pipermail/llvm-dev/attachments/20110416/cc8e0a7d/attachment.html>

On Apr 15, 2011, at 11:44 AM, vikash kumar wrote:
> Hi,
> 
> We are trying to do build a pass with constant propagation and graph
restructuring.
> 
> We are not able to find a suitable function for basic block cloning. We
have found CloneBasicBlock function but it includes the phi of the original
block in the replicated block. We don't want phi of original block in the
replicated basic block.
> 
> Also we need to change the successor and predecessor of the replicated
basic block. We are also not able to do that.
> 
Hi Vikash,

It might be better for you to simply create a new BasicBlock and loop through
the old BB and copy over the instructions from there that you want. It allows
you the ultimate in flexibility. :-)

-bw