[Bug tree-optimization/102631] -Wmaybe-uninitialized cannot see through a series of PHIs

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102631

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
We run into

MAX_CHAIN_LEN exceeded: 6

and when I up that also into

cycle detected

and then

param_uninit_control_dep_attempts exceeded: 1001

so we get a pruned predicate for the DEF.

The testcase is too unwieldly to more thoroughly analyze :/