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

[pinskia at gcc dot gnu.org]

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

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #2)
> Working after PRE:
```
  <bb 7> [local count: 134164041]:
  i_18(ab) = i_3(ab) + 1;
  directory_exists ();

  <bb 8> [local count: 134110375]:
  _39 = i_18(ab) + 1;
```
> 
> failing case after PRE:
```
  <bb 7> [local count: 134164041]:
  i_18(ab) = i_3(ab) + 1;
  directory_exists ();

  <bb 8> [local count: 134110375]:
  _39 = i_3(ab) + 2;

```

Sorry I copied things incorrectly :)