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From: "amacleod at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/93917] VRP forgets range of value read from memory
Date: Tue, 19 Sep 2023 15:11:15 +0000 [thread overview]
Message-ID: <bug-93917-4-gQdsfiqof8@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-93917-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93917
--- Comment #4 from Andrew Macleod <amacleod at redhat dot com> ---
Note a slight change in expectation as a result of commit
r14-4141-gbf6b107e2a342319b3787ec960fc8014ef3aff91 for PR 110080
Due to a memory load in the second case, we do not remove the unreachable call
now as there may be a commoning opportunity later (via inlining in this case)
in which this unreachable call may provide new information.
The test case has been adjusted to current expectations where we leave this
unreachable call and then remove it and set the global range in VRP2 instead.
prev parent reply other threads:[~2023-09-19 15:11 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <bug-93917-4@http.gcc.gnu.org/bugzilla/>
2020-11-19 23:20 ` amacleod at redhat dot com
2022-11-03 19:30 ` amacleod at redhat dot com
2022-11-28 22:09 ` pinskia at gcc dot gnu.org
2023-09-19 15:11 ` amacleod at redhat dot com [this message]
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