add an x86 implementation of MCTargetExpr for
representing @GOT and friends.  Use it for
personality references as a first use.

llvm-svn: 95588
diff --git a/llvm/lib/Target/X86/X86TargetObjectFile.cpp b/llvm/lib/Target/X86/X86TargetObjectFile.cpp
index a8faafd..9b7d5d2 100644
--- a/llvm/lib/Target/X86/X86TargetObjectFile.cpp
+++ b/llvm/lib/Target/X86/X86TargetObjectFile.cpp
@@ -8,9 +8,9 @@
 //===----------------------------------------------------------------------===//
 
 #include "X86TargetObjectFile.h"
+#include "X86MCTargetExpr.h"
 #include "llvm/CodeGen/MachineModuleInfoImpls.h"
 #include "llvm/MC/MCContext.h"
-#include "llvm/MC/MCExpr.h"
 #include "llvm/Target/Mangler.h"
 #include "llvm/ADT/SmallString.h"
 using namespace llvm;
@@ -57,9 +57,9 @@
   
   SmallString<128> Name;
   Mang->getNameWithPrefix(Name, GV, false);
-  Name += "@GOTPCREL";
+  const MCSymbol *Sym = getContext().CreateSymbol(Name);
   const MCExpr *Res =
-    MCSymbolRefExpr::Create(Name.str(), getContext());
+    X86MCTargetExpr::Create(Sym, X86MCTargetExpr::GOTPCREL, getContext());
   const MCExpr *Four = MCConstantExpr::Create(4, getContext());
   return MCBinaryExpr::CreateAdd(Res, Four, getContext());
 }