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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/115143] [11/12/13/14/15 Regression] tree
 check: expected class 'type', have 'exceptional' (error_mark) in
 useless_type_conversion_p, at gimple-expr.cc:85
Date: Sat, 18 May 2024 13:27:09 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D115143

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note this is a latent bug that dates back to r0-66475-g8eaa0f34a3387d (GCC
4.1.0)

Note also r13-1950-g9bb19e143cfe88 introduced the similar bug too.

Basically there needs a check for no phi nodes in the middle bb's.=