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From: "jens.seifert at de dot ibm.com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug target/95737] New: PPC: Unnecessary extsw after negative less than Date: Thu, 18 Jun 2020 08:10:57 +0000 [thread overview] Message-ID: <bug-95737-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95737 Bug ID: 95737 Summary: PPC: Unnecessary extsw after negative less than Product: gcc Version: 8.3.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: target Assignee: unassigned at gcc dot gnu.org Reporter: jens.seifert at de dot ibm.com Target Milestone: --- unsigned long long negativeLessThan(unsigned long long a, unsigned long long b) { return -(a < b); } gcc -m64 -O2 -save-temps negativeLessThan.C creates _Z16negativeLessThanyy: .LFB0: .cfi_startproc subfc 4,4,3 subfe 3,3,3 extsw 3,3 blr The extsw is not necessary.
next reply other threads:[~2020-06-18 8:10 UTC|newest] Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-06-18 8:10 jens.seifert at de dot ibm.com [this message] 2020-06-19 16:40 ` [Bug target/95737] " wschmidt at gcc dot gnu.org 2020-06-19 16:42 ` wschmidt at gcc dot gnu.org 2020-06-19 17:43 ` jens.seifert at de dot ibm.com 2020-06-21 15:35 ` wschmidt at linux dot ibm.com 2020-06-21 16:30 ` segher at gcc dot gnu.org 2022-01-06 5:39 ` guihaoc at gcc dot gnu.org 2022-01-13 12:19 ` segher at gcc dot gnu.org 2022-01-13 16:34 ` segher at gcc dot gnu.org 2022-01-14 9:16 ` guihaoc at gcc dot gnu.org 2022-05-18 5:24 ` cvs-commit at gcc dot gnu.org 2022-07-29 2:52 ` guihaoc at gcc dot gnu.org
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