[Bug tree-optimization/123292] Doesn't recognise open-coded memchr() (like in std::count(char , char , char)), so produces code 47% slower than if it used memchr()

pinskia at gcc dot gnu.org via Gcc-bugs Wed, 24 Dec 2025 16:05:47 -0800

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123292


--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Created attachment 63152
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=63152&action=edit
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[Bug tree-optimization/123292] Doesn't recognise open-coded memchr() (like in std::count(char *, char *, char)), so produces code 47% slower than if it used memchr()

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[Bug tree-optimization/123292] Doesn't recognise open-coded memchr() (like in std::count(char , char , char)), so produces code 47% slower than if it used memchr()