Subzero: Fix lit and cross tests broken in f8b4cc8.

src/IceGlobalInits.h

 //===- subzero/src/IceGlobalInits.h - Global declarations -------*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file declares the representation of function declarations,
@@ skipping 268 matching lines @@
 
   /// Prints out the definition of the global variable declaration
   /// (including initialization).
   void dump(GlobalContext *Ctx, Ostream &Stream) const final;
 
   static bool classof(const GlobalDeclaration *Addr) {
     return Addr->getKind() == VariableDeclarationKind;
   }
 
   bool getSuppressMangling() const final {
+    if (ForceSuppressMangling)
+      return true;
     return isExternal() && !hasInitializer();
   }
 
+  void setSuppressMangling() {
+    ForceSuppressMangling = true;
+  }
+
 private:
   // list of initializers for the declared variable.
   InitializerListType Initializers;
   // The alignment of the declared variable.
   uint32_t Alignment;
   // True if a declared (global) constant.
   bool IsConstant;
+  // If set to true, force getSuppressMangling() to return true.
+  bool ForceSuppressMangling;
 
   VariableDeclaration()
       : GlobalDeclaration(VariableDeclarationKind,
                           llvm::GlobalValue::InternalLinkage),
-        Alignment(0), IsConstant(false) {}
+        Alignment(0), IsConstant(false), ForceSuppressMangling(false) {}
 };
 
 template <class StreamType>
 inline StreamType &operator<<(StreamType &Stream,
                               const VariableDeclaration::Initializer &Init) {
   Init.dump(Stream);
   return Stream;
 }
 
 template <class StreamType>
 inline StreamType &operator<<(StreamType &Stream,
                               const GlobalDeclaration &Addr) {
   Addr.dump(Stream);
   return Stream;
 }
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICEGLOBALINITS_H