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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug rtl-optimization/101995] [9/10/11/12 Regression] regression built-in memset missed-optimization arm -Os Date: Sat, 21 Aug 2021 03:17:26 +0000 [thread overview] Message-ID: <bug-101995-4-51Swdit8hw@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-101995-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101995 --- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- REG_RETURNED is no longer there. Looks like there is an extra move which caused the code to be different. For aarch64 we have: (insn 18 4 2 2 (set (reg:DI 94) (reg:DI 0 x0 [ foo ])) "/app/example.cpp":17:42 47 {*movdi_aarch64} (nil)) (insn 2 18 3 2 (set (reg/v/f:DI 90 [ foo ]) (reg:DI 94)) "/app/example.cpp":17:42 47 {*movdi_aarch64} (expr_list:REG_DEAD (reg:DI 94) (nil))) Before the call to memset.
next prev parent reply other threads:[~2021-08-21 3:17 UTC|newest] Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-08-20 9:35 [Bug c/101995] New: " dumoulin.thibaut at gmail dot com 2021-08-20 12:21 ` [Bug middle-end/101995] " rguenth at gcc dot gnu.org 2021-08-20 21:45 ` [Bug rtl-optimization/101995] [9/10/11/12 Regression] " pinskia at gcc dot gnu.org 2021-08-21 2:53 ` pinskia at gcc dot gnu.org 2021-08-21 3:17 ` pinskia at gcc dot gnu.org [this message] 2021-08-21 3:26 ` pinskia at gcc dot gnu.org 2021-08-23 9:10 ` rguenth at gcc dot gnu.org 2021-12-08 14:10 ` [Bug rtl-optimization/101995] [9/10/11/12 Regression] regression built-in memset missed-optimization arm -Os since r9-3594 marxin at gcc dot gnu.org 2021-12-08 20:42 ` segher at gcc dot gnu.org 2021-12-08 20:44 ` segher at gcc dot gnu.org 2021-12-08 20:50 ` segher at gcc dot gnu.org 2021-12-09 8:18 ` pinskia at gcc dot gnu.org 2021-12-09 21:08 ` segher at gcc dot gnu.org 2022-01-20 10:46 ` rguenth at gcc dot gnu.org 2022-05-27 9:46 ` [Bug rtl-optimization/101995] [10/11/12/13 " rguenth at gcc dot gnu.org 2022-06-28 10:46 ` jakub at gcc dot gnu.org 2023-07-07 10:40 ` [Bug rtl-optimization/101995] [11/12/13/14 " rguenth at gcc dot gnu.org
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