[modules] Remove redundant information written into DeclContext name lookup tables. We don't need to store the data length twice.

llvm-svn: 243612

2 files changed, 6 insertions, 7 deletions

diff --git a/clang/lib/Serialization/ASTReader.cpp b/clang/lib/Serialization/ASTReader.cpp
index 0c4dab4065b..e5548fd7197 100644
--- a/clang/lib/Serialization/ASTReader.cpp
+++ b/clang/lib/Serialization/ASTReader.cpp
@@ -944,12 +944,12 @@ ASTDeclContextNameLookupTrait::ReadKey(const unsigned char* d, unsigned) {
   return Key;
 }
 
-ASTDeclContextNameLookupTrait::data_type 
-ASTDeclContextNameLookupTrait::ReadData(internal_key_type, 
-                                        const unsigned char* d,
+ASTDeclContextNameLookupTrait::data_type
+ASTDeclContextNameLookupTrait::ReadData(internal_key_type,
+                                        const unsigned char *d,
                                         unsigned DataLen) {
   using namespace llvm::support;
-  unsigned NumDecls = endian::readNext<uint16_t, little, unaligned>(d);
+  unsigned NumDecls = DataLen / 4;
   LE32DeclID *Start = reinterpret_cast<LE32DeclID *>(
                         const_cast<unsigned char *>(d));
   return std::make_pair(Start, Start + NumDecls);
diff --git a/clang/lib/Serialization/ASTWriter.cpp b/clang/lib/Serialization/ASTWriter.cpp
index ba8e1a85107..f1c907394bf 100644
--- a/clang/lib/Serialization/ASTWriter.cpp
+++ b/clang/lib/Serialization/ASTWriter.cpp
@@ -3415,8 +3415,8 @@ public:
     }
     LE.write<uint16_t>(KeyLen);
 
-    // 2 bytes for num of decls and 4 for each DeclID.
-    unsigned DataLen = 2 + 4 * Lookup.size();
+    // 4 bytes for each DeclID.
+    unsigned DataLen = 4 * Lookup.size();
     LE.write<uint16_t>(DataLen);
 
     return std::make_pair(KeyLen, DataLen);
@@ -3458,7 +3458,6 @@ public:
     using namespace llvm::support;
     endian::Writer<little> LE(Out);
     uint64_t Start = Out.tell(); (void)Start;
-    LE.write<uint16_t>(Lookup.size());
     for (DeclContext::lookup_iterator I = Lookup.begin(), E = Lookup.end();
          I != E; ++I)
       LE.write<uint32_t>(