[LLVMdev] Regarding BasicBlock Cloning

[tarun agrawal]

The clone llvm:CloneBasicBlock copies the phi function in the replicated
basic block from the original basic block.
I don't want the copy of phi in relplicated block. For now I am creating .bc
file with -O0 option so that it doesn't generate phi function in first
place. Is this a good approach or there are some other function available
for it.

Tarun

On Sun, Apr 17, 2011 at 5:22 AM, Eli Friedman <eli.friedman at gmail.com>wrote:

> On Sat, Apr 16, 2011 at 4:32 PM, tarun agrawal <tarun at cse.iitb.ac.in>
> wrote:
> > Hi,
> >
> > I am writing a pass for constant propagation using graph restructuring (
> > code duplication). I am facing following difficulties..
> >
> > 1) I need to replicate the basic block but without phi function in the
> > replicated block. How can I do this.
> >
> > 2) I need to insert that basic block after and before some particular
> basic
> > block.
>
> You probably want to use llvm::CloneBasicBlock from
> Transforms/Utils/Cloning.h to get a cloned version of a block.
> BasicBlock::splitBasicBlock might be useful as well.
>
> -Eli
>
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