[clang] [flang] [llvm] [openmp] [Clang][OpenMP][LoopTransformations] Add support for "#pragma omp fuse" loop transformation directive and "looprange" clause (PR #139293)

[Michael Kruse via llvm-commits]

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@@ -11612,6 +11612,18 @@ def note_omp_implicit_dsa : Note<
   "implicitly determined as %0">;
 def err_omp_loop_var_dsa : Error<
   "loop iteration variable in the associated loop of 'omp %1' directive may not be %0, predetermined as %2">;
+def err_omp_not_canonical_loop : Error <
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Meinersbur wrote:

```suggestion
def err_omp_not_canonical_loop : Error<
```
[nit] consistent use of whitespace in this file

https://github.com/llvm/llvm-project/pull/139293