Behave a bit more like gnu as and use the symbol (instead of the section)
for any relocation to a symbol defined in a tls section.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120121 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/ELFObjectWriter.cpp b/lib/MC/ELFObjectWriter.cpp
index 7c322f3..3b649db 100644
--- a/lib/MC/ELFObjectWriter.cpp
+++ b/lib/MC/ELFObjectWriter.cpp
@@ -718,10 +718,17 @@
 
   const MCSectionELF &Section =
     static_cast<const MCSectionELF&>(ASymbol.getSection());
+  const SectionKind secKind = Section.getKind();
 
-  if (Section.getKind().isBSS())
+  if (secKind.isBSS())
     return NULL;
 
+  if (secKind.isThreadLocal()) {
+    if (Renamed)
+      return Renamed;
+    return &Symbol;
+  }
+
   MCSymbolRefExpr::VariantKind Kind = Target.getSymA()->getKind();
   const MCSectionELF &Sec2 =
     static_cast<const MCSectionELF&>(F.getParent()->getSection());
@@ -729,8 +736,7 @@
   if (&Sec2 != &Section &&
       (Kind == MCSymbolRefExpr::VK_PLT ||
        Kind == MCSymbolRefExpr::VK_GOTPCREL ||
-       Kind == MCSymbolRefExpr::VK_GOTOFF ||
-       Kind == MCSymbolRefExpr::VK_NTPOFF)) {
+       Kind == MCSymbolRefExpr::VK_GOTOFF)) {
     if (Renamed)
       return Renamed;
     return &Symbol;