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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/109008] [13 Regression] Wrong code in scipy
 package since r13-3926-gd4c2f1d376da6f
Date: Wed, 08 Mar 2023 11:29:34 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109008

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #54602|0                           |1
        is obsolete|                            |

--- Comment #30 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 54605
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D54605&action=3Dedit
gcc13-pr109008-wip.patch

Fixed iterative patch (just for archival purposes only).
Note, even this one isn't exact, because of the way the tests conservatively
try to round inexact operations (normally in a way to make the range slight=
ly
larger, in this case the tests for e.g. low bound the normal operation towa=
rds
+inf), for f1 above with this patch one gets
[frange] double
[-1.11022302462515641716411522730772571691741167456465161356e-16
(-0x0.fffffffffffff8p-53),
2.22044604925031283432823045461545143383482334912930322712e-16
(0x0.fffffffffffff8p-52)]
instead of [-0x0.8p-53, 0x0.8p-52] which is the minimal range.=