PCH support for labels and goto.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@69364 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 24 insertions, 0 deletions

diff --git a/include/clang/Frontend/PCHReader.h b/include/clang/Frontend/PCHReader.h
index 07531df1f3..c573797693 100644
--- a/include/clang/Frontend/PCHReader.h
+++ b/include/clang/Frontend/PCHReader.h
@@ -41,6 +41,8 @@ class ASTContext;
 class Attr;
 class Decl;
 class DeclContext;
+class GotoStmt;
+class LabelStmt;
 class Preprocessor;
 class SwitchCase;
 
@@ -132,6 +134,15 @@ private:
   /// switch-case statements.
   std::map<unsigned, SwitchCase *> SwitchCaseStmts;
 
+  /// \brief Mapping from label statement IDs in the PCH file to label
+  /// statements.
+  std::map<unsigned, LabelStmt *> LabelStmts;
+
+  /// \brief Mapping from label IDs to the set of "goto" statements
+  /// that point to that label before the label itself has been
+  /// de-serialized.
+  std::multimap<unsigned, GotoStmt *> UnresolvedGotoStmts;
+
   PCHReadResult ReadPCHBlock();
   bool CheckPredefinesBuffer(const char *PCHPredef, 
                              unsigned PCHPredefLen,
@@ -254,6 +265,19 @@ public:
 
   /// \brief Retrieve the switch-case statement with the given ID.
   SwitchCase *getSwitchCaseWithID(unsigned ID);
+
+  /// \brief Record that the given label statement has been
+  /// deserialized and has the given ID.
+  void RecordLabelStmt(LabelStmt *S, unsigned ID);
+
+  /// \brief Set the label of the given statement to the label
+  /// identified by ID.
+  ///
+  /// Depending on the order in which the label and other statements
+  /// referencing that label occur, this operation may complete
+  /// immediately (updating the statement) or it may queue the
+  /// statement to be back-patched later.
+  void SetLabelOf(GotoStmt *S, unsigned ID);
 };
 
 } // end namespace clang