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

[Krzysztof Parzyszek via llvm-commits]

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@@ -131,20 +133,48 @@ class CanonicalizationOfOmp {
       // Ignore compiler directives.
       if (GetConstructIf<parser::CompilerDirective>(*nextIt))
         continue;
+      // Keep track of the loops to handle the end loop directives
+      std::stack<parser::OpenMPLoopConstruct *> loops;
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kparzysz wrote:

Please use `std::vector` instead of stack unless you need to add/remove elements from both ends.

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