[Bug tree-optimization/122016] [15/16 Regression] ICE: SSA corruption (Unable to coalesce ssa_names 4 and 18 which are marked as MUST COALESCE)

[heiko at hexco dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122016

Heiko Eißfeldt <heiko at hexco dot de> changed:

           What    |Removed                     |Added
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                 CC|                            |heiko at hexco dot de

--- Comment #3 from Heiko Eißfeldt <heiko at hexco dot de> ---
(In reply to Andrew Pinski from comment #2)
> Working:
>   <bb 7> [local count: 134164041]:
>   i_18(ab) = i_2(ab) + 1;
>   directory_exists ();
> 
>   <bb 8> [local count: 134110376]:
>   _39 = i_18(ab) + 1;
>   help_found_7 = help_found_26(ab);
> 
> failing case:
>   <bb 7> [local count: 134164041]:
>   i_18(ab) = i_2(ab) + 1;
>   directory_exists ();
> 
>   <bb 8> [local count: 134110376]:
>   _39 = i_18(ab) + 1;
>   help_found_7 = help_found_26(ab);
> 
> Looks like PRE is doing it.

The two snippets are identical!