[RuntimeDyld] Fix a bug in RuntimeDyld::loadObjectImpl that was over-…

…allocating

space for common symbols.

Patch by Dmitry Sidorov. Thanks Dmitry!

Differential revision: https://reviews.llvm.org/D50240

llvm-svn: 340125

llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp

@@ -277,7 +277,7 @@ RuntimeDyldImpl::loadObjectImpl(const object::ObjectFile &Obj) {
           uint64_t Size = I->getCommonSize();
           if (!CommonAlign)
             CommonAlign = Align;
-          CommonSize += alignTo(CommonSize, Align) + Size;
+          CommonSize = alignTo(CommonSize, Align) + Size;
           CommonSymbolsToAllocate.push_back(*I);
         }
       } else