[clang] [llvm] [OpenMP] Missing implicit otherwise clause in metadirective. (PR #127113)

[Alexey Bataev via cfe-commits]

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@@ -2882,6 +2882,12 @@ StmtResult Parser::ParseOpenMPDeclarativeOrExecutableDirective(
           /*ReadDirectiveWithinMetadirective=*/true);
       break;
     }
+    // If no match is found and no otherwise clause is present, skip
+    // OMP5.2 Chapter 7.4: If no otherwise clause is specified the effect is as
+    // if one was specified without an associated directive variant.
+    if (BestIdx == -1 && Idx == 1) {
+      SkipUntil(tok::annot_pragma_openmp_end);
+    }
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alexey-bataev wrote:

Not sure skipUntil is good here, since you may miss some junk at the end of the directive

https://github.com/llvm/llvm-project/pull/127113