1 files changed, 33 insertions, 3 deletions
diff --git a/llvm/lib/CodeGen/AsmPrinter/DIEHash.h b/llvm/lib/CodeGen/AsmPrinter/DIEHash.h
index 27e3c576318..3c025bb58ee 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DIEHash.h
+++ b/llvm/lib/CodeGen/AsmPrinter/DIEHash.h
@@ -20,15 +20,35 @@ class CompileUnit;
 /// \brief An object containing the capability of hashing and adding hash
 /// attributes onto a DIE.
 class DIEHash {
+  // The entry for a particular attribute.
+  struct AttrEntry {
+    const DIEValue *Val;
+    const DIEAbbrevData *Desc;
+  };
+
+  // Collection of all attributes used in hashing a particular DIE.
+  struct DIEAttrs {
+    AttrEntry DW_AT_name;
+  };
+
 public:
   /// \brief Computes the ODR signature
   uint64_t computeDIEODRSignature(DIE *Die);
 
+  /// \brief Computes the CU signature
+  uint64_t computeCUSignature(DIE *Die);
+
   // Helper routines to process parts of a DIE.
- private:
+private:
   /// \brief Adds the parent context of \param Die to the hash.
   void addParentContext(DIE *Die);
-  
+
+  /// \brief Adds the attributes of \param Die to the hash.
+  void addAttributes(DIE *Die);
+
+  /// \brief Computes the full DWARF4 7.27 hash of the DIE.
+  void computeHash(DIE *Die);
+
   // Routines that add DIEValues to the hash.
 private:
   /// \brief Encodes and adds \param Value to the hash as a ULEB128.
@@ -36,7 +56,17 @@ private:
 
   /// \brief Adds \param Str to the hash and includes a NULL byte.
   void addString(StringRef Str);
-  
+
+  /// \brief Collects the attributes of DIE \param Die into the \param Attrs
+  /// structure.
+  void collectAttributes(DIE *Die, DIEAttrs Attrs);
+
+  /// \brief Hashes the attributes in \param Attrs in order.
+  void hashAttributes(DIEAttrs Attrs);
+
+  /// \brief Hashes an individual attribute.
+  void hashAttribute(AttrEntry Attr);
+
 private:
   MD5 Hash;
 };