RUN: llvm-cxxfilt -_ __ZN2ns1fE _ZSt1f _f | FileCheck %s -check-prefix CHECK-STRIPPED
RUN: llvm-cxxfilt __ZN2ns1fE _ZSt1f _f | FileCheck %s -check-prefix CHECK-UNSTRIPPED

CHECK-STRIPPED: ns::f
CHECK-STRIPPED: _ZSt1f
CHECK-STRIPPED: _f

CHECK-UNSTRIPPED: __ZN2ns1fE
CHECK-UNSTRIPPED: std::f
CHECK-UNSTRIPPED: _f