[Bug middle-end/110228] [13/14 Regression] llvm-16 miscompiled due to an maybe uninitialized variable

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110228

--- Comment #25 from Sergei Trofimovich <slyfox at gcc dot gnu.org> ---
Specifically this bug.c.034t.ccp1's bit looks fishy:

...
Folding statement: LookupFlags_14 = 1;
Queued stmt for removal.  Folds to: 1
Folding statement: LookupFlags_15 = 0;
Queued stmt for removal.  Folds to: 0
Folding PHI node: LookupFlags_4 = PHI <0(4), LookupFlags_5(5), 1(6)>
No folding possible
Folding statement: *p_16(D) = LookupFlags_4;
Not folded
Folding statement: i_18 = i_6 + 1;
Not folded
Removing dead stmt:i_8 = 0;
Removing dead stmt:LookupFlags_14 = 1;
Removing dead stmt:LookupFlags_15 = 0;