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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/109845] Addition overflow/carry flag unnecessarily put in a temporary register Date: Sat, 13 May 2023 18:45:59 +0000 [thread overview] Message-ID: <bug-109845-4-h67h9ewSH6@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-109845-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109845 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Last reconfirmed| |2023-05-13 Status|UNCONFIRMED |NEW Severity|normal |enhancement Component|rtl-optimization |middle-end Keywords| |missed-optimization Ever confirmed|0 |1 --- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- So the difference between good1 and bad1 at the gimple level is the order of operands of the bit_ior: good1: ov_8 = _13 != 0; _9 = x_2(D) != 0; _10 = ov_8 | _9; if (_10 != 0) bad1: ov_7 = _13 != 0; _1 = x_8(D) != 0; _2 = _1 | ov_7; if (_2 != 0)
next prev parent reply other threads:[~2023-05-13 18:45 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-05-13 18:32 [Bug rtl-optimization/109845] New: " chfast at gmail dot com 2023-05-13 18:39 ` [Bug rtl-optimization/109845] " pinskia at gcc dot gnu.org 2023-05-13 18:45 ` pinskia at gcc dot gnu.org [this message] 2023-05-15 6:52 ` [Bug middle-end/109845] " rguenth at gcc dot gnu.org
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