[flang] [llvm] [Flang][OpenMP] WIP: Add frontend support for declare variant (PR #130578)

[Mats Petersson via llvm-commits]

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@@ -1494,6 +1494,25 @@ class OmpVisitor : public virtual DeclarationVisitor {
     return true;
   }
 
+  bool Pre(const parser::OmpDeclareVariantDirective &x) {
+    AddOmpSourceRange(x.source);
+    auto FindSymbolOrError = [&](const parser::Name &procName) {
+      auto *symbol{FindSymbol(NonDerivedTypeScope(), procName)};
+      if (!symbol) {
+        context().Say(procName.source,
+            "Implicit subroutine declaration '%s' in !$OMP DECLARE VARIANT"_err_en_US,
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Leporacanthicus wrote:

Is there a test for this?

https://github.com/llvm/llvm-project/pull/130578