LTO: Introduce LTOModule::getSymbolGV().

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@239993 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/LTO/LTOModule.h

@@ -143,6 +143,12 @@ public:
     return nullptr;
   }
 
+  const GlobalValue *getSymbolGV(uint32_t index) {
+    if (index < _symbols.size())
+      return _symbols[index].symbol;
+    return nullptr;
+  }
+
   /// Get the number of dependent libraries
   uint32_t getDependentLibraryCount() {
     return _deplibs.size();