Avoid symbol name clash when filling TOC.

Patch by Adhemerval Zanella.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164141 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/MCContext.cpp b/lib/MC/MCContext.cpp
index b5b14b9..477bd17 100644
--- a/lib/MC/MCContext.cpp
+++ b/lib/MC/MCContext.cpp
@@ -153,6 +153,12 @@
   return Symbols.lookup(Name);
 }
 
+MCSymbol *MCContext::LookupSymbol(const Twine &Name) const {
+  SmallString<128> NameSV;
+  Name.toVector(NameSV);
+  return LookupSymbol(NameSV.str());
+}
+
 //===----------------------------------------------------------------------===//
 // Section Management
 //===----------------------------------------------------------------------===//