[LLVMdev] get basic blocks inside a loop

Naznin Fauzia laboni14 at gmail.com
Mon May 9 15:37:16 PDT 2011


Thanks Michael. Can you please explain you way a bit more? Did you run a
function pass then a loop pass?


On Mon, May 9, 2011 at 12:56 PM, Michael Ilseman <michael at lunarg.com> wrote:

> Whenever I was tying to do that (in version 2.8), it didn't give them
> to me in a topological order. What I did, as a hack-ish temporary
> measure, was rely on Function's ordering, and just iterated over all
> the blocks in the function, checking to see if the loop contains that
> block. Not at all ideal, and what I was writing later evolved to not
> need the topological ordering constraint, so I never revisited the
> problem. In hindsight, I don't even know if Function guarantees that
> they are presented in a topological order, but it always happened to
> be the case for me.
>
>
> On Mon, May 9, 2011 at 10:45 AM, Naznin Fauzia <laboni14 at gmail.com> wrote:
> > Hi all,
> >
> > I have a question about llvm::LoopBase  getBlocks() method. Does it
> return
> > the basic blocks inside the loop in random order? I need to order the
> blocks
> > in some valid topological ordering of the AST. If getBlocks() does not do
> > that,  what can I do to find the ordering?
> >
> > Thanks,
> > Naznin
> >
> > _______________________________________________
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> > LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
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> >
> >
>
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