diff --git a/experiments/placer/Makefile b/experiments/placer/Makefile
index ade84628fb3..6062e6c49b4 100644
--- a/experiments/placer/Makefile
+++ b/experiments/placer/Makefile
@@ -10,4 +10,7 @@ clean:
 
 placer: placer.o
 
+place.o: placer.cc layout.h
+	$(CXX) $(CXXFLAGS) -c placer.cc
+
 .PHONY: all run clean
diff --git a/experiments/placer/layout.h b/experiments/placer/layout.h
new file mode 100644
index 00000000000..336ffa8f419
--- /dev/null
+++ b/experiments/placer/layout.h
@@ -0,0 +1,407 @@
+#pragma once
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <cassert>
+#include <cstddef>
+#include <initializer_list>
+
+class Container;
+class TypeInfo;
+
+// Header of every object. Now contains direct references, will contain
+// offsets in real translated code.
+struct ObjHeader {
+  Container* container_;
+  const TypeInfo* type_info_;
+};
+
+// Header of value type array objects.
+struct ArrayHeader : public ObjHeader {
+  int count_;
+};
+
+
+// Class representing placement container. Container is used for reference counting,
+// and it is assumed that objects with related placement will share container. Only
+// whole container can be freed, individual objects are not taken into account.
+class Container {
+ private:
+  // Data where everything is being stored.
+  uint8_t* data_;
+  // Current allocation limit. As objects never freed, we can have rather simple
+  // allocation algorithm.
+  uint8_t* current_;
+  // Total size of the container.
+  int size_;
+  // Reference counter of container.
+  int ref_count_;
+
+ public:
+  Container(int size)
+    : size_(size), ref_count_(1) {
+    data_ = reinterpret_cast<uint8_t*>(calloc(size_, 1));
+    current_ = data_;
+  }
+
+  ~Container() {
+    assert(ref_count_ == 0);
+    free(data_);
+  }
+
+  // Allocation function.
+  void* Place(int size) {
+    if (current_ + size > data_ + size_) {
+      return nullptr;
+    }
+    void* result = current_;
+    current_ += size;
+    return result;
+  }
+
+  // Place individual object in this container.
+  ObjHeader* PlaceObject(const TypeInfo* type_info);
+
+  // Places an array of certain type in this container. Note that array_type_info
+  // is type infor for an array, not for an individual element.
+  ArrayHeader* PlaceArray(const TypeInfo* array_type_info, int count);
+
+  // Increment reference counter associated with container.
+  void AddRef() {
+    if (data_) {
+      // printf("addref %d\n", ref_count_);
+      ref_count_++;
+    }
+  }
+
+  // Decrement reference counter associated with container.
+  // For objects whith tricky lifetime (such as ones shared between threads objects)
+  // individual container per object shall be created. As an alternative, such objects
+  // could be evacuated from short-lived containers.
+  void Release() {
+    if (data_) {
+      // printf("release %d\n", ref_count_);
+      ref_count_--;
+    }
+  }
+
+  // Dispose whole container ignoring non-zero refcount. Use with care.
+  void Dispose() {
+    ref_count_ = 0;
+    free(data_);
+    data_ = nullptr;
+    current_ = nullptr;
+  }
+};
+
+// Raw reference to data, meaning T*, invented only for cleaness of intentions.
+template <class T>
+class RawRef {
+ private:
+  T* ptr_;
+ public:
+  RawRef(T* ptr) : ptr_(ptr) {}
+  const T& get() const { return *ptr_; }
+  void set(const T& value) { *ptr_ = value; }
+};
+
+// Object reference, adds reference counting in container and type information.
+class AnyObjRef {
+ protected:
+  ObjHeader* ptr_;
+
+  explicit AnyObjRef(ObjHeader* ptr) : ptr_(ptr) {
+    if (ptr_) {
+      container()->AddRef();
+    }
+  }
+
+ public:
+  ~AnyObjRef() {
+    if (ptr_) {
+      container()->Release();
+    }
+  }
+
+  Container* container() const {
+    return ptr_->container_;
+  }
+
+  const TypeInfo* type_info() const {
+    return ptr_->type_info_;
+  }
+
+  // Accesses raw data inside object specified by offset. Typing by M is optional and
+  // will be replaced by translator typing.
+  template<typename M, int offset>
+  RawRef<M> at() const {
+    return RawRef<M>(
+      reinterpret_cast<M*>(reinterpret_cast<uint8_t*>(any_ref()) + offset));
+  }
+
+  // Assign reference to certain object. Releases currently held object in its container and
+  // adds reference to container storing given object.
+  void Assign(const AnyObjRef& other) {
+    // TODO: optimize for an important case where containers match?
+    if (ptr_) {
+      container()->Release();
+    }
+    ptr_ = other.ptr_;
+    if (ptr_) {
+      container()->AddRef();
+    }
+  }
+
+  // Returns pointer to the raw data referred by this reference.
+  uint8_t* any_ref() const {
+    if (!ptr_) return nullptr;
+    return reinterpret_cast<uint8_t*>(ptr_) + sizeof(ObjHeader);
+  }
+
+  // Uses pointer stored in object's field to create a reference to that object.
+  AnyObjRef any_obj_at(int offset) const {
+    assert(ptr_);
+    return AnyObjRef(*reinterpret_cast<ObjHeader**>(any_ref() + offset));
+  }
+
+  // Checks if given reference has null value.
+  bool null() const { return ptr_ == nullptr; }
+};
+
+// Returns typeinfo for array of type T. Specialize for types which are allowed as array elements.
+template <typename T>
+const TypeInfo* GetArrayTypeInfo() {
+  return nullptr;
+}
+
+// Reference to an object with particular memory layout specified by T.
+// In real runtime will be compile time only type, on runtime all references are
+// AnyObjRef.
+template <class T>
+class ObjRef : public AnyObjRef {
+ private:
+  explicit ObjRef(ObjHeader* ptr) : AnyObjRef(ptr) {}
+
+  // Reference to raw data in owned class.
+  T* ref() const {
+    if (!ptr_) return nullptr;
+    return reinterpret_cast<T*>(any_ref());
+  }
+
+  template <typename T1> friend class ArrayRef;
+
+ public:
+  // Assigns reference, compile time type-safe.
+  ObjRef(const ObjRef& other) : AnyObjRef(nullptr) {
+    Assign(other);
+  }
+  ObjRef& operator=(const ObjRef& other) {
+    Assign(other);
+    return *this;
+  }
+  void Assign(const ObjRef<T>& other) {
+    AnyObjRef::Assign(other);
+  }
+
+  // Copies data bits to another place, reference counting is properly accounted for
+  // by consulting type information.
+  void CopyTo(ObjRef<T> other) const;
+
+  // Clones object to given container.
+  ObjRef<T> Clone(Container* container) {
+    ObjRef<T> result = Alloc(container);
+    CopyTo(result);
+    return result;
+  }
+
+  // Takes typed object reference at offset.
+  template<typename M, int offset>
+  ObjRef<M> obj_at() const {
+    return ObjRef<M>(reinterpret_cast<M*>(any_ref() + offset));
+  }
+
+  // Allocates properly typed object in container.
+  static ObjRef<T> Alloc(Container* container) {
+    return ObjRef<T>(container->PlaceObject(T::GetTypeInfo()));
+  }
+};
+
+// This is an array of value types only, no object references here.
+template <class T>
+class ArrayRef : public AnyObjRef {
+ protected:
+  explicit ArrayRef(ArrayHeader* ptr) : AnyObjRef(ptr) {}
+  ArrayHeader* header() { return reinterpret_cast<ArrayHeader*>(ptr_); }
+
+ public:
+   static ArrayRef<T> Alloc(Container* container, int count) {
+     auto result = ArrayRef<T>(container->PlaceArray(GetArrayTypeInfo<T>(), count));
+     result.header()->count_ = count;
+     return result;
+  }
+
+  RawRef<T> element_at(int index) const {
+    assert(header() && index >= 0 && index < header()->count_);
+    return reinterpret_cast<T*>(any_ref() + index * sizeof(T));
+  }
+};
+
+// All names in system are stored as hashes (or maybe, for debug builds,
+// as pointers to uniqued C strings containing names?).
+typedef uint64_t name_hash_t;
+
+// An element of sorted by hash in-place array representing methods.
+struct MethodTableRecord {
+  name_hash_t name_signature_;
+  void* method_entry_point_;
+};
+
+// An element of sorted by hash in-place array representing field offsets.
+struct FieldTableRecord {
+  name_hash_t name_signature_;
+  int field_offset_;
+};
+
+// This class represents runtime type information and by itself is compile time
+// constant.
+class TypeInfo {
+ private:
+  name_hash_t name_;
+  int size_;
+  const TypeInfo* super_type_;
+  const int* obj_offsets_;
+  int obj_offsets_count_;
+  TypeInfo* const* implemented_interfaces_;
+  int implemented_interfaces_count_;
+  const MethodTableRecord* methods_;
+  int methods_count_;
+  const FieldTableRecord* fields_;
+  int fields_count_;
+ public:
+  TypeInfo(name_hash_t name, int size, const TypeInfo* super_type,
+	   std::initializer_list<int> obj_offsets,
+	   std::initializer_list<TypeInfo*> implemented_interfaces,
+	   std::initializer_list<MethodTableRecord> methods,
+	   std::initializer_list<FieldTableRecord> fields)
+    : name_(name), size_(size), super_type_(super_type),
+      obj_offsets_(obj_offsets.begin()), obj_offsets_count_(obj_offsets.size()),
+    implemented_interfaces_(implemented_interfaces.begin()),
+    implemented_interfaces_count_(implemented_interfaces.size()),
+    methods_(methods.begin()), methods_count_(methods.size()),
+    fields_(fields.begin()), fields_count_(fields.size()) {}
+
+  name_hash_t name() const { return name_; }
+  int size() const { return size_; }
+  const TypeInfo* super_type() const { return super_type_; }
+  const int* obj_offsets(int* count) const {
+    *count = obj_offsets_count_;
+    return obj_offsets_;
+  }
+};
+
+inline ObjHeader* Container::PlaceObject(const TypeInfo* type_info) {
+  int size = type_info->size() + sizeof(ObjHeader);
+    ObjHeader* result = reinterpret_cast<ObjHeader*>(Place(size));
+    if (!result) {
+      return nullptr;
+    }
+    result->container_ = this;
+    result->type_info_ = type_info;
+    return result;
+  }
+
+inline ArrayHeader* Container::PlaceArray(const TypeInfo* type_info, int count) {
+  int size = sizeof(ArrayHeader) + type_info->size() * count;
+  ArrayHeader* result = reinterpret_cast<ArrayHeader*>(Place(size));
+  if (!result) {
+    return nullptr;
+  }
+  result->container_ = this;
+  result->type_info_ = type_info;
+  result->count_ = count;
+  return result;
+}
+
+template <typename T>
+inline void ObjRef<T>::CopyTo(ObjRef<T> other) const {
+  assert(!other.null());
+  assert(other.type_info()->size() == type_info()->size());
+  if (ref()) {
+    memcpy(other.ref(), ref(), sizeof(T));
+    int obj_offsets_count = 0;
+    const int* obj_offsets = ptr_->type_info_->obj_offsets(&obj_offsets_count);
+    for (int i = 0; i < obj_offsets_count; ++i) {
+      AnyObjRef any = other.any_obj_at(obj_offsets[i]);
+      if (!any.null()) {
+	any.container()->AddRef();
+      }
+    }
+  } else {
+    // TODO: shall we do anything if copy from/to null?
+  }
+}
+
+
+// This is magic for compile-time hash computation. Not needed in real translator.
+static constexpr uint32_t crc_table[256] = {
+	0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
+	0xe963a535, 0x9e6495a3,	0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
+	0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
+	0xf3b97148, 0x84be41de,	0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
+	0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec,	0x14015c4f, 0x63066cd9,
+	0xfa0f3d63, 0x8d080df5,	0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
+	0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,	0x35b5a8fa, 0x42b2986c,
+	0xdbbbc9d6, 0xacbcf940,	0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
+	0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
+	0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
+	0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,	0x76dc4190, 0x01db7106,
+	0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
+	0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
+	0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
+	0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
+	0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
+	0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
+	0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
+	0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
+	0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
+	0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
+	0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
+	0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
+	0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
+	0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
+	0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
+	0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
+	0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
+	0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
+	0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
+	0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
+	0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
+	0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
+	0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
+	0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
+	0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
+	0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
+	0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
+	0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
+	0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
+	0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
+	0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
+	0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
+};
+
+template<size_t idx>
+constexpr uint32_t crc32(const char * str) {
+    return (crc32<idx-1>(str) >> 8) ^ crc_table[(crc32<idx-1>(str) ^ str[idx]) & 0x000000FF];
+}
+
+// Stop-recursion function
+template<>
+constexpr uint32_t crc32<size_t(-1)>(const char * str) {
+    return 0xFFFFFFFF;
+}
+
+constexpr name_hash_t NameHash(const char* name) {
+  return crc32<sizeof(name) - 2>(name) ^ 0xFFFFFFFF;
+}
diff --git a/experiments/placer/placer.cc b/experiments/placer/placer.cc
index e0cbc264342..bc211f70d49 100644
--- a/experiments/placer/placer.cc
+++ b/experiments/placer/placer.cc
@@ -6,187 +6,24 @@
 #include <cassert>
 #include <cstddef>
 
-class Container {
- private:
-  uint8_t* data_;
-  uint8_t* current_;
-  int size_;
-  int ref_count_;
-
- public:
-  Container(int size)
-    : size_(size), ref_count_(1) {
-    data_ = reinterpret_cast<uint8_t*>(calloc(size_, 1));
-    current_ = data_;
-  }
-
-  ~Container() {
-    assert(ref_count_ == 0);
-    free(data_);
-  }
-
-  void* Place(int size) {
-    size += sizeof(Container*);
-    if (current_ + size > data_ + size_) {
-      return nullptr;
-    }
-    Container** result = reinterpret_cast<Container**>(current_);
-    *result = this;
-    current_ += size;
-    return result;
-  }
-
-  void AddRef() {
-    if (data_) {
-      //printf("addref %d\n", ref_count_);
-      ref_count_++;
-    }
-  }
-
-  void Release() {
-    if (data_) {
-      // printf("release %d\n", ref_count_);
-      ref_count_--;
-    }
-  }
-
-  void Dispose() {
-    // Destroy container ignoring non-zero refcount. Use with care.
-    ref_count_ = 0;
-    free(data_);
-    data_ = nullptr;
-    current_ = nullptr;
-  }
-};
-
-// Raw reference to data, meaning T*, invented only for cleaness of intentions.
-template <class T>
-class RawRef {
- private:
-  T* ptr_;
- public:
-  RawRef(T* ptr) : ptr_(ptr) {}
-  const T& get() const { return *ptr_; }
-  void set(const T& value) { *ptr_ = value; }
-};
-
-class AnyObjRef {
- protected:
-  void* ptr_;
-
-  explicit AnyObjRef(void* ptr) : ptr_(ptr) {
-    if (ptr_) {
-      container()->AddRef();
-    }
-  }
-
- public:
-  ~AnyObjRef() {
-    if (ptr_) {
-      container()->Release();
-    }
-  }
-
-  Container* container() {
-    return *reinterpret_cast<Container**>(ptr_);
-  }
-
-  template<typename M, int offset>
-  RawRef<M> at() const {
-    return RawRef<M>(
-      reinterpret_cast<M*>(reinterpret_cast<uint8_t*>(any_ref()) + offset));
-  }
-
-  void Assign(const AnyObjRef& other) {
-    // TODO: optimize for an important case where containers match?
-    if (ptr_) {
-      container()->Release();
-    }
-    ptr_ = other.ptr_;
-    if (ptr_) {
-      container()->AddRef();
-    }
-  }
-
-  uint8_t* any_ref() const {
-    if (!ptr_) return nullptr;
-    return reinterpret_cast<uint8_t*>(ptr_) + sizeof(Container*);
-  }
-
-  AnyObjRef any_obj_at(int offset) const {
-    assert(ptr_);
-    return AnyObjRef(*reinterpret_cast<void**>(any_ref() + offset));
-  }
-
-  bool null() const { return ptr_ == nullptr; }
-};
-
-// Object reference, adds reference counting in container.
-template <class T>
-class ObjRef : public AnyObjRef {
- private:
-  explicit ObjRef(void* ptr) : AnyObjRef(ptr) {}
-
-  T* ref() const {
-    if (!ptr_) return nullptr;
-    return reinterpret_cast<T*>(any_ref());
-  }
-
- public:
-  ObjRef(const ObjRef& other) : AnyObjRef(nullptr) {
-    Assign(other);
-  }
-  ObjRef& operator=(const ObjRef& other) {
-    Assign(other);
-    return *this;
-  }
-
-  void Assign(const ObjRef<T>& other) {
-    AnyObjRef::Assign(other);
-  }
-
-  void CopyTo(ObjRef<T> other) const {
-    assert(!other.null());
-    if (ref()) {
-      memcpy(other.ref(), ref(), sizeof(T));
-      for (int i = 0; i < sizeof(T::obj_offsets) / sizeof(T::obj_offsets[0]); ++i) {
-	AnyObjRef any = other.any_obj_at(T::obj_offsets[i]);
-	if (!any.null()) {
-	  any.container()->AddRef();
-	}
-      }
-    } else {
-      // TODO: shall we do anything if copy from/to null?
-    }
-  }
-
-  ObjRef<T> Clone(Container* container) {
-    ObjRef<T> result = Alloc(container);
-    CopyTo(result);
-    return result;
-  }
-
-  template<typename M, int offset>
-  ObjRef<M> obj_at() const {
-    return ObjRef<M>(
-      reinterpret_cast<M*>(any_ref() + offset));
-  }
-
-  static ObjRef<T> Alloc(Container* container) {
-    return ObjRef<T>(container->Place(sizeof(T)));
-  }
-};
+#include "layout.h"
 
 struct List {
+  static const TypeInfo* GetTypeInfo() {
+    const static TypeInfo result = {
+      NameHash("List"), sizeof(List), nullptr, {0, 8},
+      {}, // implemented interfaces
+      {}, // methods
+      {}  // fields
+    };
+    return &result;
+  }
+
   ObjRef<List> next_;
   ObjRef<List> prev_;
   int data_;
-  // Object offsets in the class, needed for CopyTo() operation to update refs and for GC.
-  static constexpr int obj_offsets[] = { 0 /* =offsetof(struct List, next_) */, 8 /* =offsetof(struct List, prev_) */ };
 };
 
-constexpr int List::obj_offsets[];
-
 void UpdateElement(ObjRef<List> element) {
   element.at<int, offsetof(struct List, data_)>().set
     (element.at<int, offsetof(struct List, data_)>().get() + 10);