[Bug tree-optimization/90316] [8/9 Regression] large compile time increase in opt / alias stmt walking for Go example

[thanm at google dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90316

--- Comment #32 from Than McIntosh <thanm at google dot com> ---
Compile time for the larger example looks good for the most recent commit on
trunk (271124), ~130 seconds. Thanks for all your help on this.