[clang] [Clang][OpenMP] Add an additional class to hold data that will be shared between all loop transformations (PR #155849)

[Roger Ferrer Ibáñez via cfe-commits]

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@@ -956,30 +956,42 @@ class OMPLoopBasedDirective : public OMPExecutableDirective {
   }
 };
 
+/// Common class of data shared between
+/// OMPCanonicalLoopNestTransformationDirective and transformations over
+/// canonical loop sequences.
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rofirrim wrote:

I'm afraid I'll have to back up on this as a number of things don't really work unless they have a subclass (e.g., tablegen and the `classof` support) which in this case it'll be the `OMPFuseDirective` introduced in https://github.com/llvm/llvm-project/pull/139293

https://github.com/llvm/llvm-project/pull/155849