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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/62079] [4.9/5 Regression] ICE: in calc_dfs_tree, at dominance.c:401 with -fnon-call-exceptions
Date: Wed, 13 Aug 2014 13:17:00 -0000	[thread overview]
Message-ID: <bug-62079-4-lq89E3XQ3b@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-62079-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62079

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Ok, so this is if-after-reload which calls loop_optimizer_init on a CFG
with an unreachable block.  Thus we miss a cfg-cleanup somewhere.

Note that regular ifcvt runs a cleanup_cfg (CLEANUP_EXPENSIVE), but
not if-after-combine or if-after-reload.

It's peephole2 that ends up with this bogus CFG.

Passes leaving dangling unreachable blocks should fix that up.


  parent reply	other threads:[~2014-08-13 13:17 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-08-10 10:13 [Bug tree-optimization/62079] New: [4.9/4.10 " zsojka at seznam dot cz
2014-08-11  8:49 ` [Bug tree-optimization/62079] " rguenth at gcc dot gnu.org
2014-08-13 13:17 ` rguenth at gcc dot gnu.org [this message]
2014-08-13 14:04 ` [Bug tree-optimization/62079] [4.9/5 " rguenth at gcc dot gnu.org
2014-08-14  8:57 ` [Bug tree-optimization/62079] [4.9 " rguenth at gcc dot gnu.org
2014-08-14  8:57 ` rguenth at gcc dot gnu.org
2014-09-09 11:43 ` rguenth at gcc dot gnu.org
2014-09-09 11:43 ` rguenth at gcc dot gnu.org

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