[flang] [llvm] [mlir] [flang][OpenMP] Enable tiling (PR #143715)

[Sergio Afonso via llvm-commits]

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@@ -3035,18 +3035,56 @@ convertOmpLoopNest(Operation &opInst, llvm::IRBuilderBase &builder,
     loopInfos.push_back(*loopResult);
   }
 
-  // Collapse loops. Store the insertion point because LoopInfos may get
-  // invalidated.
   llvm::OpenMPIRBuilder::InsertPointTy afterIP =
       loopInfos.front()->getAfterIP();
 
-  // Update the stack frame created for this loop to point to the resulting loop
-  // after applying transformations.
-  moduleTranslation.stackWalk<OpenMPLoopInfoStackFrame>(
-      [&](OpenMPLoopInfoStackFrame &frame) {
-        frame.loopInfo = ompBuilder->collapseLoops(ompLoc.DL, loopInfos, {});
-        return WalkResult::interrupt();
-      });
+  llvm::CanonicalLoopInfo *NewTopLoopInfo = nullptr;
+
+  // Do tiling
----------------
skatrak wrote:

Nit: Add punctuation to these comments.

https://github.com/llvm/llvm-project/pull/143715