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

[Krzysztof Parzyszek via llvm-commits]

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@@ -482,6 +484,28 @@ bool ConstructDecompositionT<C, H>::applyClause(
 
   return false;
 }
+// FIXME(JAN): Do the correct thing, but for now we'll do the same as collapse
+template <typename C, typename H>
+bool ConstructDecompositionT<C, H>::applyClause(
+    const tomp::clause::SizesT<TypeTy, IdTy, ExprTy> &clause,
+    const ClauseTy *node) {
+  // Apply "sizes" to the innermost directive. If it's not one that
+  // allows it flag an error.
+  if (!leafs.empty()) {
+    auto &last = leafs.back();
+
+    if (llvm::omp::isAllowedClauseForDirective(last.id, node->id, version)) {
+      last.clauses.push_back(node);
+      return true;
+    } else {
+      //      llvm::errs() << "** OVERRIDING isAllowedClauseForDirective **\n";
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kparzysz wrote:

An alternative would be to leave this unchanged and then modify the output of this.

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