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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/67955] tree-dse does not use pointer info
Date: Tue, 13 Oct 2015 14:25:00 -0000	[thread overview]
Message-ID: <bug-67955-4-MaAoL6Vonv@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-67955-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67955

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
We use "must point to" nowhere because we don't compute it ;)

The same points-to set results from

int *p = (int *)((char *)&a + 2);

or even

int *p = &a + 1;

so you can't use points-to info that way (to derive a must-alias).


  reply	other threads:[~2015-10-13 14:25 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-10-13 13:57 [Bug tree-optimization/67955] New: " vries at gcc dot gnu.org
2015-10-13 14:25 ` rguenth at gcc dot gnu.org [this message]
2015-10-13 15:34 ` [Bug tree-optimization/67955] " vries at gcc dot gnu.org
2015-10-14  7:28 ` rguenth at gcc dot gnu.org
2015-10-14 11:06 ` vries at gcc dot gnu.org
2015-10-14 12:18 ` vries at gcc dot gnu.org
2015-10-14 14:56 ` vries at gcc dot gnu.org
2015-10-15  6:32 ` vries at gcc dot gnu.org
2015-10-15  6:32 ` vries at gcc dot gnu.org

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