[Bug middle-end/26241] [8/9 Regression] None of the IPA passes are documented in passes.texi

[luoxhu at cn dot ibm.com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=26241

--- Comment #24 from Xiong Hu XS Luo <luoxhu at cn dot ibm.com> ---
closing this since no need backport?