[Bug fortran/69815] Don't always use BLOCKS for front-end optimization variables

[tkoenig at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69815
Bug 69815 depends on bug 82568, which changed state.

Bug 82568 Summary: [6/7/8] ICE with do-loop inside BLOCK inside omp
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82568

           What    |Removed                     |Added
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             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED