Remove Offset from Common.

It is not needed since it is always 0.

llvm-svn: 313076
diff --git a/lld/ELF/LinkerScript.cpp b/lld/ELF/LinkerScript.cpp
index 3ccc2c9..ebbb8ef 100644
--- a/lld/ELF/LinkerScript.cpp
+++ b/lld/ELF/LinkerScript.cpp
@@ -872,7 +872,7 @@
     if (auto *D = dyn_cast<DefinedRegular>(B))
       return {D->Section, D->Value, Loc};
     if (auto *C = dyn_cast<DefinedCommon>(B))
-      return {C->Section, C->Offset, Loc};
+      return {C->Section, 0, Loc};
   }
   error(Loc + ": symbol not found: " + S);
   return 0;
diff --git a/lld/ELF/Symbols.cpp b/lld/ELF/Symbols.cpp
index 6fabb80..08d9eb6 100644
--- a/lld/ELF/Symbols.cpp
+++ b/lld/ELF/Symbols.cpp
@@ -103,8 +103,7 @@
     if (!Config->DefineCommon)
       return 0;
     auto DC = cast<DefinedCommon>(Body);
-    return DC.Section->getParent()->Addr + DC.Section->OutSecOff +
-           DC.Offset;
+    return DC.Section->getParent()->Addr + DC.Section->OutSecOff;
   }
   case SymbolBody::SharedKind: {
     auto &SS = cast<SharedSymbol>(Body);
diff --git a/lld/ELF/Symbols.h b/lld/ELF/Symbols.h
index b55e5eb..8cea404 100644
--- a/lld/ELF/Symbols.h
+++ b/lld/ELF/Symbols.h
@@ -172,7 +172,6 @@
 
   // The output offset of this common symbol in the output bss.
   // Computed by the writer.
-  uint64_t Offset;
   uint64_t Size;
   BssSection *Section = nullptr;
 };
diff --git a/lld/ELF/SyntheticSections.cpp b/lld/ELF/SyntheticSections.cpp
index 922ad69..ad1ec14 100644
--- a/lld/ELF/SyntheticSections.cpp
+++ b/lld/ELF/SyntheticSections.cpp
@@ -65,7 +65,9 @@
       continue;
 
     Sym->Section = make<BssSection>("COMMON");
-    Sym->Offset = Sym->Section->reserveSpace(Sym->Size, Sym->Alignment);
+    size_t Pos = Sym->Section->reserveSpace(Sym->Size, Sym->Alignment);
+    assert(Pos == 0);
+    (void)Pos;
     Sym->Section->File = Sym->getFile();
     Ret.push_back(Sym->Section);
   }