PCH serialization/deserialization of the source manager. With this

improvement, source locations read from the PCH file will properly
resolve to the source files that were used to build the PCH file
itself.

Once we have the preprocessor state stored in the PCH file, source
locations that refer to macro instantiations that occur in the PCH
file should have the appropriate instantiation information.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68758 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 39 insertions, 1 deletions

diff --git a/include/clang/Frontend/PCHBitCodes.h b/include/clang/Frontend/PCHBitCodes.h
index 8835098361..00bd1cfac2 100644
--- a/include/clang/Frontend/PCHBitCodes.h
+++ b/include/clang/Frontend/PCHBitCodes.h
@@ -31,7 +31,19 @@ namespace clang {
       /// \brief The PCH block, which acts as a container around the
       /// full PCH block.
       PCH_BLOCK_ID = llvm::bitc::FIRST_APPLICATION_BLOCKID,
-      
+
+      /// \brief The block containing information about the language
+      /// options used to build this precompiled header.
+      LANGUAGE_OPTIONS_BLOCK_ID,
+
+      /// \brief The block containing information about the source
+      /// manager.
+      SOURCE_MANAGER_BLOCK_ID,
+
+      /// \brief The block containing information about the
+      /// preprocessor.
+      PREPROCESSOR_BLOCK_ID,
+
       /// \brief The block containing the definitions of all of the
       /// types used within the PCH file.
       TYPES_BLOCK_ID,
@@ -55,6 +67,30 @@ namespace clang {
       DECL_OFFSETS_BLOCK_ID
     };
 
+    /// \brief Record types used within a source manager block.
+    enum SourceManagerRecordTypes {
+      /// \brief Describes a source location entry (SLocEntry) for a
+      /// file.
+      SM_SLOC_FILE_ENTRY = 1,
+      /// \brief Describes a source location entry (SLocEntry) for a
+      /// buffer.
+      SM_SLOC_BUFFER_ENTRY = 2,
+      /// \brief Describes a blob that contains the data for a buffer
+      /// entry. This kind of record always directly follows a
+      /// SM_SLOC_BUFFER_ENTRY record.
+      SM_SLOC_BUFFER_BLOB = 3,
+      /// \brief Describes a source location entry (SLocEntry) for a
+      /// macro instantiation.
+      SM_SLOC_INSTANTIATION_ENTRY = 4
+    };
+
+    /// \defgroup PCHAST Precompiled header AST constants
+    ///
+    /// The constants in this group describe various components of the
+    /// abstract syntax tree within a precompiled header.
+    ///
+    /// @{
+
     /// \brief Predefined type IDs.
     ///
     /// These type IDs correspond to predefined types in the AST
@@ -233,6 +269,8 @@ namespace clang {
     enum DeclOffsetCode {
       DECL_OFFSET = 1
     };
+
+    /// @}
   }
 } // end namespace clang