Merge pull request #37211 from compnerd/windows-static-linking

IRGen: support static linking on Windows

lib/Serialization/ModuleFile.h

@@ -461,6 +461,11 @@ public:
     return Core->Bits.IsTestable;
   }
 
+  /// Whether this module is compiled as static library.
+  bool isStaticLibrary() const {
+    return Core->Bits.IsStaticLibrary;
+  }
+
   /// Whether the module is resilient. ('-enable-library-evolution')
   ResilienceStrategy getResilienceStrategy() const {
     return ResilienceStrategy(Core->Bits.ResilienceStrategy);