[flang] [llvm] [Flang][OpenMP] Initial defaultmap implementation (PR #135226)

[Krzysztof Parzyszek via llvm-commits]

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@@ -2231,6 +2232,146 @@ genSingleOp(lower::AbstractConverter &converter, lower::SymMap &symTable,
       queue, item, clauseOps);
 }
 
+static clause::Defaultmap::ImplicitBehavior
+getDefaultmapIfPresent(DefaultMapsTy &defaultMaps, mlir::Type varType) {
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kparzysz wrote:

std::map has "at" that works for "const this".  If the given key is not present in the map, it will abort.  The operator [] will insert the key with a default-initialized value, so the map cannot be const for it to work.

https://github.com/llvm/llvm-project/pull/135226