Go back to having a takeModule instead of a getModule.

Returning a std::unique_ptr is more constrained. Thanks to David Blaikie for the
suggestion.

llvm-svn: 215979

clang/examples/clang-interpreter/main.cpp

@@ -165,7 +165,7 @@ int main(int argc, const char **argv, char * const *envp) {
     return 1;
 
   int Res = 255;
-  if (std::unique_ptr<llvm::Module> &Module = Act->getModule())
+  if (std::unique_ptr<llvm::Module> Module = Act->takeModule())
     Res = Execute(std::move(Module), envp);
 
   // Shutdown.

clang/include/clang/CodeGen/CodeGenAction.h

@@ -54,7 +54,7 @@ public:
 
   /// Take the generated LLVM module, for use after the action has been run.
   /// The result may be null on failure.
-  std::unique_ptr<llvm::Module> &getModule() { return TheModule; }
+  std::unique_ptr<llvm::Module> takeModule() { return std::move(TheModule); }
 
   /// Take the LLVM context used by this action.
   llvm::LLVMContext *takeLLVMContext();