cuda/codegen.cc: split emitAccess into two functions

This will make it easier to perform some checks on the intermediate
results in the next commit.

Author: Sven Verdoolaege

tc/core/polyhedral/cuda/codegen.cc

@@ -396,9 +396,18 @@ struct LdgWrapper {
   std::ostream& out_;
 };
 
+template <typename AFF>
+isl::ast_expr buildAccess(AFF access, const CodegenStatementContext& context) {
+  return context.build().access_from(access);
+}
+
+void emitAccess(isl::ast_expr access, const CodegenStatementContext& context) {
+  context.ss << access.to_C_str();
+}
+
 template <typename AFF>
 void emitAccess(AFF access, const CodegenStatementContext& context) {
-  context.ss << context.build().access_from(access).to_C_str();
+  emitAccess(buildAccess(access, context), context);
 }
 
 // Print an access to global memory, wrapping the access in an "__ldg()"