rename APInt::toString -> toStringUnsigned for symmetry with toStringSigned()

Add an APSInt::toString() method.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41309 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/ExecutionEngine/Interpreter/Execution.cpp b/lib/ExecutionEngine/Interpreter/Execution.cpp
index 281f774..53df544 100644
--- a/lib/ExecutionEngine/Interpreter/Execution.cpp
+++ b/lib/ExecutionEngine/Interpreter/Execution.cpp
@@ -1346,8 +1346,9 @@
     case Type::DoubleTyID:  DOUT << "double " << Val.DoubleVal; break;
     case Type::PointerTyID: DOUT << "void* " << intptr_t(Val.PointerVal); break;
     case Type::IntegerTyID: 
-      DOUT << "i" << Val.IntVal.getBitWidth() << " " << Val.IntVal.toString(10)
-           << " (0x" << Val.IntVal.toString(16) << ")\n";
+      DOUT << "i" << Val.IntVal.getBitWidth() << " "
+           << Val.IntVal.toStringUnsigned(10)
+           << " (0x" << Val.IntVal.toStringUnsigned(16) << ")\n";
       break;
   }
 }