[LLVMdev] DominanceFrontier

[George Baah]

The issue is that when I call the PostDominatorTree pass and I try to get
the root of the tree, I get the seg fault. When I compile llvm in release
mode everything works fine and dandy.

I removed the inline attribute from the functions in PostDominators.h and
recompiled llvm in debug mode. Same problem!
The problems has to do with the PostDominators.h or PostDominatorTree. I am
not even sure any longer.

--George

On Tue, Aug 21, 2012 at 10:57 AM, Marco Minutoli <mminutoli at gmail.com>wrote:

> George Baah <georgebaah at gmail.com> writes:
>
> > Hi Guys,
> >
> > I saw in the API that DominanceFrontier has been deprecated. Is this
> > for real?
> > I have read the computational issues but shouldn't that be left to the
> > users of llvm?
> > My concern is I am writing a Control Dependence module that uses
> > Dominance-Frontier information.
> > Getting rid of Dominance Frontiers will put me in a tight spot.
> >
> > George
>
> Hi,
>
> I had the same issue implementing a pass that build PDGs for an exam two
> months ago.
>
> As an alternative to the (post)-dominance frontier method I used the
> algorithm described in [1], section 9.5 "Program Dependence Graph" where
> you can find a method to build the CDG using only the post-dominator
> tree.
>
> Happy hacking,
> Marco
>
> [1] Advanced Compiler Design & Implementation by Steven S. Muchnick
>
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