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List:       gcc-bugs
Subject:    [Bug tree-optimization/102631] -Wmaybe-uninitialized cannot see through a series of PHIs
From:       "rguenth at gcc dot gnu.org via Gcc-bugs" <gcc-bugs () gcc ! gnu ! org>
Date:       2022-08-31 14:17:45
Message-ID: bug-102631-4-ROavHE65EE () http ! gcc ! gnu ! org/bugzilla/
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102631

--- 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 :/=
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