llvm-project/clang/test/CodeGenCXX/debug-info-static-fns.cpp

// RUN: %clang_cc1 -emit-llvm -g -triple x86_64-apple-darwin %s -o - | FileCheck %s

namespace A {
  static int a(int b) { return b + 4; }

  int b(int c) { return c + a(c); }
}

// Verify that a is present and mangled.
// CHECK: !DISubprogram(name: "a", linkageName: "_ZN1AL1aEi",
// CHECK-SAME:          line: 4
// CHECK-SAME:          isDefinition: true
// CHECK-SAME:          function: i32 (i32)* @_ZN1AL1aEi