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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/94734] [10 Regression] Program crashes when
 compiled with -O2 since r10-1892-gb9ef6a2e04bfd013
Date: Fri, 24 Apr 2020 07:55:20 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D94734

--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #8)
> In particular tree_could_trap_p woudl consider the load possibly trapping
> due to the variable indexing but the patch seems to override that which
> I agree is bogus.  I think we need to revert it and re-implement for GCC =
11.
> All testcases contain a dominating load in the condition and what we _can_
> do is treat loads of stack variables the same as stores as far as
> non-trappingness is concerned.

Actually the non-trapping machinery only considers plain SSA name
dereferences so there's much more to extend.  Definitely nothing
for GCC 10.=