Delete UnknownAddress. It is a perfectly valid symbol value.

getSymbolValue now returns a value that in convenient for most callers:
* 0 for undefined
* symbol size for common symbols
* offset/address for symbols the rest

Code that needs something more specific can check getSymbolFlags.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241605 91177308-0d34-0410-b5e6-96231b3b80d8

tools/llvm-objdump/llvm-objdump.cpp

@@ -825,8 +825,6 @@ static void DisassembleObject(const ObjectFile *Obj, bool InlineRelocs) {
         if (error(AddressOrErr.getError()))
           break;
         uint64_t Address = *AddressOrErr;
-        if (Address == UnknownAddress)
-          continue;
         Address -= SectionAddr;
         if (Address >= SectSize)
           continue;
@@ -1136,11 +1134,6 @@ void llvm::PrintSymbolTable(const ObjectFile *o) {
     bool Common = Flags & SymbolRef::SF_Common;
     bool Hidden = Flags & SymbolRef::SF_Hidden;
 
-    if (Common)
-      Address = Symbol.getCommonSize();
-
-    if (Address == UnknownAddress)
-      Address = 0;
     char GlobLoc = ' ';
     if (Type != SymbolRef::ST_Unknown)
       GlobLoc = Global ? 'g' : 'l';