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From: "christophe.leroy at csgroup dot eu" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug target/94395] Powerpc suboptimal 64-bit constant generation near large values with few bits set Date: Fri, 11 Feb 2022 13:50:31 +0000 [thread overview] Message-ID: <bug-94395-4-XXgHjISGn9@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-94395-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94395 Christophe Leroy <christophe.leroy at csgroup dot eu> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |christophe.leroy at csgroup dot eu --- Comment #2 from Christophe Leroy <christophe.leroy at csgroup dot eu> --- Problem still present with GCC 11.2 Linux kernel has a huge amount of sequences like: b4: 3d 20 fc ff lis r9,-769 b8: 61 29 ff ff ori r9,r9,65535 bc: 79 29 07 c6 rldicr r9,r9,32,31 c0: 65 29 ff ff oris r9,r9,65535 c4: 61 29 ff ff ori r9,r9,65535 c8: 7d 3d 03 a6 mtamr r9 Could instead be: li r9, -769 rotldi r9, r9, 48
next prev parent reply other threads:[~2022-02-11 13:50 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-03-30 5:34 [Bug target/94395] New: " npiggin at gmail dot com 2020-04-30 17:23 ` [Bug target/94395] " segher at gcc dot gnu.org 2022-02-11 13:50 ` christophe.leroy at csgroup dot eu [this message] 2023-10-08 3:12 ` guojiufu at gcc dot gnu.org
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