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From: "xxs_chy at outlook dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/114712] New: Missed optimization: simplify if-else basic blocks that share common destinations Date: Sat, 13 Apr 2024 18:19:24 +0000 [thread overview] Message-ID: <bug-114712-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114712 Bug ID: 114712 Summary: Missed optimization: simplify if-else basic blocks that share common destinations Product: gcc Version: 14.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: xxs_chy at outlook dot com Target Milestone: --- Godbolt link: https://godbolt.org/z/hY6Eaj8fj ``` void dummy(); void dummy1(); void src(bool c1, bool c2){ if(c1) { if(c2) goto bb1; else goto bb2; } else { if(c2) goto bb2; else goto bb1; } bb1: dummy(); return; bb2: dummy1(); return; } ``` can be folded to: ``` void tgt(bool c1, bool c2){ if (c1 ^ c2) { dummy1(); } else { dummy(); } } ``` It saves unnecessary branches.
next reply other threads:[~2024-04-13 18:19 UTC|newest] Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-04-13 18:19 xxs_chy at outlook dot com [this message] 2024-04-13 18:25 ` [Bug tree-optimization/114712] " pinskia at gcc dot gnu.org
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