[ThinLTO] Fix gcc warnings from commit

Remove an unnecessary const from an Optional return type introduced
in r364960 that gcc 7.4.0 warns about. It is unnecessary and possibly
incorrect.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@365047 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm/IR/ModuleSummaryIndex.h b/include/llvm/IR/ModuleSummaryIndex.h
index 23c991eb8fb469903647a293f39f32b6c4ba9e52..0470db738b042a8e525d801a463cceedaee739b8 100644 (file)
--- a/include/llvm/IR/ModuleSummaryIndex.h
+++ b/include/llvm/IR/ModuleSummaryIndex.h
@@ -1308,7 +1308,7 @@ public:
 
   /// For the given \p TypeId, this returns the TypeIdCompatibleVtableMap
   /// entry if present in the summary map. This may be used when importing.
-  Optional<const TypeIdCompatibleVtableInfo>
+  Optional<TypeIdCompatibleVtableInfo>
   getTypeIdCompatibleVtableSummary(StringRef TypeId) const {
     auto I = TypeIdCompatibleVtableMap.find(TypeId);
     if (I == TypeIdCompatibleVtableMap.end())