$ cat main.cpp
#include <stdio.h>

static void Foo(void)
{
  typedef struct {
    int x1;
    int x2;
  } FOO_VAR_TYPE;
  static FOO_VAR_TYPE MyDummyVar __attribute__((aligned(4), used, section("TAD_VIRTUAL, TAD_DUMMY_DATA"), nocommon));
  printf("Foo called");
}

int main()
{
  Foo();
  return 1;
}

$ clang++ -O2 -g main.cpp -c -o main.o
$ clang++ main.o -o main.out

RUN: dsymutil -oso-prepend-path %p/../Inputs %p/../Inputs/private/tmp/keep_func/main.out -o %t.omit.dSYM
RUN: dsymutil -oso-prepend-path %p/../Inputs %p/../Inputs/private/tmp/keep_func/main.out -o %t.keep.dSYM -keep-function-for-static
RUN: llvm-dwarfdump %t.omit.dSYM | FileCheck %s --check-prefix OMIT
RUN: llvm-dwarfdump %t.keep.dSYM | FileCheck %s --check-prefix KEEP

KEEP:     DW_AT_name	("MyDummyVar")
KEEP:     DW_AT_name	("FOO_VAR_TYPE")
KEEP:     DW_AT_name	("x1")
KEEP:     DW_AT_name	("x2")

OMIT-NOT: DW_AT_name	("MyDummyVar")
OMIT-NOT: DW_AT_name	("FOO_VAR_TYPE")
OMIT-NOT: DW_AT_name	("x1")
OMIT-NOT: DW_AT_name	("x2")