Remove StringRef->std::string->StringRef conversions.

As StringInit::get() accepts StringRef there is no need 
to construct a std::string out of the StringRef input and
then construct a new StringRef from the std::string.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@232551 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed