[NFC] Add Incremental Info Bits to ModuleFileSharedCore

Author: CodaFi

lib/Serialization/ModuleFile.h

@@ -465,6 +465,9 @@ class ModuleFile
     return Core->Bits.IsImplicitDynamicEnabled;
   }
 
+  /// \c true if this module has incremental dependency information.
+  bool hasIncrementalInfo() const { return Core->hasIncrementalInfo(); }
+
   /// Associates this module file with the AST node representing it.
   ///
   /// Checks that the file is compatible with the AST module it's being loaded

lib/Serialization/ModuleFileSharedCore.h

@@ -69,10 +69,13 @@ class ModuleFileSharedCore {
   /// The data blob containing all of the module's identifiers.
   StringRef IdentifierData;
 
-  // Full blob from the misc. version field of the metadata block. This should
-  // include the version string of the compiler that built the module.
+  /// Full blob from the misc. version field of the metadata block. This should
+  /// include the version string of the compiler that built the module.
   StringRef MiscVersion;
 
+  /// \c true if this module has incremental dependency information.
+  bool HasIncrementalInfo = false;
+
 public:
   /// Represents another module that has been imported as a dependency.
   class Dependency {
@@ -490,6 +493,10 @@ class ModuleFileSharedCore {
   ArrayRef<Dependency> getDependencies() const {
     return Dependencies;
   }
+
+  /// Returns \c true if this module file contains a section with incremental
+  /// information.
+  bool hasIncrementalInfo() const { return HasIncrementalInfo; }
 };
 
 template <typename T, typename RawData>

lib/Serialization/SerializedModuleLoader.cpp

@@ -714,6 +714,8 @@ LoadedFile *SerializedModuleLoaderBase::loadAST(
       M.setPrivateImportsEnabled();
     if (loadedModuleFile->isImplicitDynamicEnabled())
       M.setImplicitDynamicEnabled();
+    if (loadedModuleFile->hasIncrementalInfo())
+      M.setHasIncrementalInfo();
 
     auto diagLocOrInvalid = diagLoc.getValueOr(SourceLoc());
     loadInfo.status =