llvm-project/clang/test/CodeGen/cfstring.c

// RUN: %clang_cc1 -emit-llvm %s -o %t
#define CFSTR __builtin___CFStringMakeConstantString

void f() {
  CFSTR("Hello, World!");
}

// rdar://6248329
void *G = CFSTR("yo joe");

void h() {
  static void* h = CFSTR("Goodbye, World!");
}