From: Jan Hubicka <hubicka@ucw.cz>
To: Richard Henderson <rth@redhat.com>,
law@redhat.com, Jan Hubicka <hubicka@ucw.cz>,
Jan Hubicka <jh@suse.cz>,
gcc@gcc.gnu.org
Subject: Re: Tree-SSA self checking infrastructure
Date: Wed, 19 Nov 2003 21:34:00 -0000 [thread overview]
Message-ID: <20031119212348.GU16923@atrey.karlin.mff.cuni.cz> (raw)
In-Reply-To: <20031119210127.GB31811@redhat.com>
> On Wed, Nov 19, 2003 at 12:13:06PM -0700, law@redhat.com wrote:
> > >This brings me into questions about my tail call updating code.
> > >Perhaps I need to re-do SSA form on call cobbered variables after
> > >removing the call?
> > Are you changing the CFG? Are you changing the dominator tree? Those
> > are the key questions.
>
> Yes, he is, but only by adding a new block on the ENTRY->BB0 edge,
> and then edges into that block from the tail recursion sites.
>
> I may be mistaken, but I thought the new phi nodes he was adding
> there would be correct. Perhaps this is a good test for a verify_ssa
> pass?
Actually good motivation to write it.
However I didn't find anythign wrong about it, just double checking
everything.
The problem appears to be must_alias related. If I do tailcall/tail
recursion before it, everything works, after it it breaks, but of course
disabling must_alias may alter decisions of later passes.
I've collected several fixes to must_alias/tree-dfa and I re-testing now
so perhaps the bug will just go away....
Honza
>
>
> r~
next prev parent reply other threads:[~2003-11-19 21:23 UTC|newest]
Thread overview: 80+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-11-19 18:38 Jan Hubicka
2003-11-19 18:43 ` law
2003-11-19 18:48 ` Andrew MacLeod
2003-11-19 18:56 ` Jan Hubicka
2003-11-19 19:04 ` Andrew MacLeod
2003-11-19 19:39 ` law
2003-11-19 19:01 ` law
2003-11-19 19:12 ` Andrew MacLeod
2003-11-19 20:16 ` law
2003-11-19 18:51 ` Jan Hubicka
2003-11-19 19:09 ` law
2003-11-19 19:14 ` Jan Hubicka
2003-11-19 19:47 ` law
2003-11-19 20:23 ` Andrew MacLeod
2003-11-19 20:29 ` Andrew MacLeod
2003-11-19 20:36 ` Andrew MacLeod
2003-11-19 20:40 ` Andrew MacLeod
2003-11-19 22:12 ` Andrew MacLeod
2003-11-19 22:46 ` law
2003-11-19 22:59 ` law
2003-11-19 20:47 ` Jan Hubicka
2003-11-19 21:13 ` law
2003-11-19 21:18 ` Jan Hubicka
2003-11-19 21:45 ` law
2003-11-19 21:49 ` Andrew MacLeod
2003-11-19 21:23 ` Richard Henderson
2003-11-19 21:34 ` Jan Hubicka [this message]
2003-11-19 21:44 ` law
2003-11-19 21:45 ` Jan Hubicka
2003-11-19 21:51 ` law
2003-11-19 22:13 ` Andrew MacLeod
2003-11-20 0:14 ` Diego Novillo
2003-11-19 22:15 ` Jan Hubicka
2003-11-19 22:56 ` law
2003-11-19 21:58 ` Richard Henderson
2003-11-19 19:34 ` Jan Hubicka
2003-11-19 20:02 ` law
2003-11-19 20:49 ` Jan Hubicka
2003-11-19 21:01 ` law
2003-11-19 21:22 ` Jan Hubicka
2003-11-19 21:28 ` Richard Henderson
2003-11-21 6:35 ` Jan Hubicka
2003-11-21 8:10 ` law
2003-11-21 12:31 ` Jan Hubicka
2003-11-19 19:06 ` Richard Henderson
2003-11-19 19:09 ` Jan Hubicka
2003-11-19 21:36 ` Richard Henderson
2003-11-19 21:45 ` Jan Hubicka
2003-11-19 21:47 ` Richard Henderson
2003-11-19 22:23 ` Tree sharing issues Jan Hubicka
2003-11-19 22:27 ` law
2003-11-19 22:31 ` Jan Hubicka
2003-11-19 22:50 ` law
2003-11-19 23:02 ` Jan Hubicka
2003-11-19 23:02 ` law
2003-11-19 23:08 ` Jan Hubicka
2003-11-19 23:12 ` law
2003-11-19 23:20 ` Jan Hubicka
2003-11-19 23:23 ` law
2003-11-19 23:27 ` Jan Hubicka
2003-11-19 23:30 ` Richard Henderson
2003-11-20 0:33 ` Diego Novillo
2003-11-20 0:34 ` Jan Hubicka
2003-11-20 0:46 ` Diego Novillo
2003-11-20 4:22 ` law
2003-11-20 6:17 ` Diego Novillo
2003-11-19 23:33 ` law
2003-11-19 23:34 ` Richard Henderson
2003-11-20 0:02 ` Jan Hubicka
2003-11-19 23:46 ` Jan Hubicka
2003-11-20 18:38 ` law
2003-11-20 0:37 ` Diego Novillo
2003-11-20 0:41 ` Jan Hubicka
2003-11-20 1:26 ` Jan Hubicka
2003-11-20 0:20 ` Diego Novillo
2003-11-20 0:29 ` Jan Hubicka
2003-11-20 0:55 ` Diego Novillo
2003-11-20 0:15 ` Tree-SSA self checking infrastructure Diego Novillo
2003-11-20 0:21 ` Jan Hubicka
2003-11-20 9:31 ` Jan Hubicka
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