Add a helper getSymbol to AsmPrinter.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193627 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMMCInstLower.cpp b/lib/Target/ARM/ARMMCInstLower.cpp
index b641483..e12c9c6 100644
--- a/lib/Target/ARM/ARMMCInstLower.cpp
+++ b/lib/Target/ARM/ARMMCInstLower.cpp
@@ -82,7 +82,7 @@
         MO.getMBB()->getSymbol(), OutContext));
     break;
   case MachineOperand::MO_GlobalAddress:
-    MCOp = GetSymbolRef(MO, Mang->getSymbol(MO.getGlobal()));
+    MCOp = GetSymbolRef(MO, getSymbol(MO.getGlobal()));
     break;
   case MachineOperand::MO_ExternalSymbol:
    MCOp = GetSymbolRef(MO,