[RuntimeDyld] Skip undefined symbols when building the symbol table.

Storing these in the symbol table (with zero values) is just wasted space.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@288225 91177308-0d34-0410-b5e6-96231b3b80d8

lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp

@@ -205,6 +205,10 @@ RuntimeDyldImpl::loadObjectImpl(const object::ObjectFile &Obj) {
        ++I) {
     uint32_t Flags = I->getFlags();
 
+    // Skip undefined symbols.
+    if (Flags & SymbolRef::SF_Undefined)
+      continue;
+
     if (Flags & SymbolRef::SF_Common)
       CommonSymbols.push_back(*I);
     else {