llvm-project/clang/test/CodeGen/2002-12-15-StructParameters.c

// RUN: %clang_cc1 -emit-llvm %s  -o /dev/null

typedef struct
{
  void *stack;
  unsigned size;
  unsigned avail;
} compile_stack_type;

void foo(void*);
void bar(compile_stack_type T, unsigned);

void test() {
  compile_stack_type CST;
  foo(&CST);

  bar(CST, 12);
}