[Bug ipa/106158] IPA SRA ssa_name_only_returned_p is quadratic

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106158

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
That is with -O2 -funswitch-loops -fno-thread-jumps -fno-tree-dominator-opts
-fno-tree-vrp plus some changes to make unswitching SSA update cheaper