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Re: [tree-ssa] Removal of gotos from cfg based ir
- From: Chris Lattner <sabre at nondot dot org>
- To: Zdenek Dvorak <rakdver at atrey dot karlin dot mff dot cuni dot cz>
- Cc: Diego Novillo <dnovillo at redhat dot com>, Jeff Law <law at redhat dot com>,Andrew Macleod <amacleod at redhat dot com>,gcc-patches <gcc-patches at gcc dot gnu dot org>, Jan Hubicka <jh at suse dot cz>
- Date: Fri, 14 Nov 2003 01:05:35 -0600 (CST)
- Subject: Re: [tree-ssa] Removal of gotos from cfg based ir
On Fri, 14 Nov 2003, Chris Lattner wrote:
> On Fri, 14 Nov 2003, Zdenek Dvorak wrote:
> > > FWIW, LLVM does the exact opposite of this: the CFG is implicitly defined
> > > by the goto's in the program (as opposed to Zdenek's design, where the
> > > gotos are implicitly defined by the CFG).
> >
> > how do you get the edges in the cfg then?
>
> Def-use edges, which are tracked for all SSA values.
Sorry for the terseness. Def-use edges are used to get predecessors,
use-def edges are used to get successors.
-Chris
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