[Bug tree-optimization/86489] ICE in gimple_phi_arg starting with r261682 when building 531.deepsjeng_r with FDO + LTO

[kugan at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86489

--- Comment #1 from kugan at gcc dot gnu.org ---
Sorry about the breakage, I am trying to reproduce it on x86-64. Please let me
know if you have testcase.