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

[Tom Eccles via llvm-commits]

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@@ -2992,18 +2991,60 @@ 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 = builder.saveIP();
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tblah wrote:

Was keeping this unintentional?

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