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Re: [tree-ssa] Fix bootstrap failure caused by tree-ssa-loop.c
- From: law at redhat dot com
- To: Jan Hubicka <jh at suse dot cz>
- Cc: Andrew MacLeod <amacleod at redhat dot com>, Diego Novillo <dnovillo at redhat dot com>, Jan Hubicka <hubicka at ucw dot cz>, gcc-patches <gcc-patches at gcc dot gnu dot org>
- Date: Mon, 15 Dec 2003 15:42:28 -0700
- Subject: Re: [tree-ssa] Fix bootstrap failure caused by tree-ssa-loop.c
- Reply-to: law at redhat dot com
In message <20031211210135.GC27614@kam.mff.cuni.cz>, Jan Hubicka writes:
>That breaks not only by Zdenek's code. Any edge splitting or such would
>break it. How it is supposed to work?
Which is why PRE (for example) rebuilds the dominator tree.
I don't think it's particularly interesting to describe how it is supposed
to work since I don't think the current implementation is desirable long
term since it's intimately ties to block indices. That's a long term
recipe for disaster.
jeff