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From: "aldyh at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/102844] [9/10/11/12 Regression] vrp inserting assert causes miscompiling when doing update_ssa Date: Wed, 20 Oct 2021 09:47:40 +0000 [thread overview] Message-ID: <bug-102844-4-jZyB05EPgg@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-102844-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102844 Aldy Hernandez <aldyh at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |amacleod at redhat dot com --- Comment #18 from Aldy Hernandez <aldyh at gcc dot gnu.org> --- (In reply to rguenther@suse.de from comment #17) > On Wed, 20 Oct 2021, aldyh at gcc dot gnu.org wrote: > > Silly question, why is the SSA form invalid on entry to VRP2? That's just > > asking for trouble. Is this related to how asserts work? > > Well, DOM threading creates invalid SSA (definition not dominating use). > Doesn't have to do anything with VRP or asserts. Ah, I see. BTW, if this is still the case in mainline, this is bound to be a problem for the ranger. Andrew, won't we get an UNDEFINED / unreachable if we query the non dominating use at this point?
next prev parent reply other threads:[~2021-10-20 9:47 UTC|newest] Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-10-19 17:45 [Bug c/102844] New: gcc-9.x miscompiles unsigned char expression in switch breiten at lexmark dot com 2021-10-19 17:58 ` [Bug tree-optimization/102844] [9/10/11/12 Regression] " pinskia at gcc dot gnu.org 2021-10-19 18:11 ` pinskia at gcc dot gnu.org 2021-10-19 18:13 ` pinskia at gcc dot gnu.org 2021-10-19 18:23 ` [Bug tree-optimization/102844] [9/10/11/12 Regression] vrp inserting assert causes miscompiling when doing update_ssa pinskia at gcc dot gnu.org 2021-10-20 7:10 ` rguenth at gcc dot gnu.org 2021-10-20 7:44 ` rguenth at gcc dot gnu.org 2021-10-20 7:49 ` rguenth at gcc dot gnu.org 2021-10-20 8:08 ` marxin at gcc dot gnu.org 2021-10-20 8:28 ` rguenth at gcc dot gnu.org 2021-10-20 8:33 ` marxin at gcc dot gnu.org 2021-10-20 8:59 ` rguenth at gcc dot gnu.org 2021-10-20 9:00 ` rguenth at gcc dot gnu.org 2021-10-20 9:03 ` rguenth at gcc dot gnu.org 2021-10-20 9:08 ` rguenth at gcc dot gnu.org 2021-10-20 9:19 ` rguenth at gcc dot gnu.org 2021-10-20 9:21 ` aldyh at gcc dot gnu.org 2021-10-20 9:30 ` rguenther at suse dot de 2021-10-20 9:47 ` aldyh at gcc dot gnu.org [this message] 2021-10-20 9:50 ` rguenth at gcc dot gnu.org 2021-10-20 9:50 ` rguenth at gcc dot gnu.org 2021-10-20 10:56 ` marxin at gcc dot gnu.org 2021-10-20 12:49 ` [Bug tree-optimization/102844] [9/10/11/12 Regression] DOM jump threading not copying block that became non-empty amacleod at redhat dot com 2021-10-20 16:13 ` law at gcc dot gnu.org 2021-10-21 6:02 ` rguenth at gcc dot gnu.org 2022-05-20 8:24 ` [Bug tree-optimization/102844] [9/10/11/12/13 " rguenth at gcc dot gnu.org 2022-05-20 12:01 ` aldyh at gcc dot gnu.org 2022-05-20 15:11 ` law at gcc dot gnu.org 2022-05-20 15:33 ` aldyh at gcc dot gnu.org 2022-05-27 9:46 ` [Bug tree-optimization/102844] [10/11/12/13 " rguenth at gcc dot gnu.org 2022-06-28 10:46 ` jakub at gcc dot gnu.org 2023-01-19 13:26 ` rguenth at gcc dot gnu.org 2023-07-07 10:41 ` [Bug tree-optimization/102844] [11/12/13/14 " rguenth at gcc dot gnu.org 2023-09-19 11:24 ` rguenth at gcc dot gnu.org 2023-09-19 11:25 ` [Bug tree-optimization/102844] [11/12/13 " rguenth at gcc dot gnu.org
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