Shrink AOT snapshot size and memory usage.

runtime/vm/object.h

Index: runtime/vm/object.h
diff --git a/runtime/vm/object.h b/runtime/vm/object.h
index b502dfcd3558f8c4d33e5a19a39bdbc8c12f8267..38d9d9174ae77a6def7b2fc008684d4dbb376ac1 100644
--- a/runtime/vm/object.h
+++ b/runtime/vm/object.h
@@ -1886,7 +1886,12 @@ class ICData : public Object {
   intptr_t NumArgsTested() const;
 
   intptr_t deopt_id() const {
+#if defined(DART_PRECOMPILED_RUNTIME)
+    UNREACHABLE();
+    return -1;
+#else
     return raw_ptr()->deopt_id_;
+#endif
   }
 
   bool IsImmutable() const;
@@ -2307,7 +2312,13 @@ class Function : public Object {
     return raw_ptr()->code_;
   }
 
-  RawCode* unoptimized_code() const { return raw_ptr()->unoptimized_code_; }
+  RawCode* unoptimized_code() const {
+#if defined(DART_PRECOMPILED_RUNTIME)
+    return static_cast<RawCode*>(Object::null());
+#else
+    return raw_ptr()->unoptimized_code_;
+#endif
+  }
   void set_unoptimized_code(const Code& value) const;
   bool HasCode() const;
 
@@ -2441,12 +2452,28 @@ class Function : public Object {
   }
   bool IsInFactoryScope() const;
 
-  TokenPosition token_pos() const { return raw_ptr()->token_pos_; }
+  TokenPosition token_pos() const {
+#if defined(DART_PRECOMPILED_RUNTIME)
+    return TokenPosition();
+#else
+    return raw_ptr()->token_pos_;
+#endif
+  }
   void set_token_pos(TokenPosition value) const;
 
-  TokenPosition end_token_pos() const { return raw_ptr()->end_token_pos_; }
+  TokenPosition end_token_pos() const {
+#if defined(DART_PRECOMPILED_RUNTIME)
+    return TokenPosition();
+#else
+    return raw_ptr()->end_token_pos_;
+#endif
+}
   void set_end_token_pos(TokenPosition value) const {
+#if defined(DART_PRECOMPILED_RUNTIME)
+    UNREACHABLE();
+#else
     StoreNonPointer(&raw_ptr()->end_token_pos_, value);
+#endif
   }
 
   intptr_t num_fixed_parameters() const {
@@ -2484,48 +2511,86 @@ class Function : public Object {
   intptr_t NumImplicitParameters() const;
 
   static intptr_t usage_counter_offset() {
+#if defined(DART_PRECOMPILED_RUNTIME)
+    UNREACHABLE();
+    return 0;
+#else
     return OFFSET_OF(RawFunction, usage_counter_);
+#endif
   }
   intptr_t usage_counter() const {
+#if defined(DART_PRECOMPILED_RUNTIME)
+    return 0;
+#else
     return raw_ptr()->usage_counter_;
+#endif
   }
   void set_usage_counter(intptr_t value) const {
+#if defined(DART_PRECOMPILED_RUNTIME)
+    UNREACHABLE();
+#else
     // TODO(Srdjan): Assert that this is thread-safe, i.e., only
     // set from mutator-thread or while at a safepoint (e.g., during marking).
     StoreNonPointer(&raw_ptr()->usage_counter_, value);
+#endif
   }
 
   int8_t deoptimization_counter() const {
+#if defined(DART_PRECOMPILED_RUNTIME)
+    return 0;
+#else
     return raw_ptr()->deoptimization_counter_;
+#endif
   }
   void set_deoptimization_counter(int8_t value) const {
+#if defined(DART_PRECOMPILED_RUNTIME)
+    UNREACHABLE();
+#else
     ASSERT(value >= 0);
     StoreNonPointer(&raw_ptr()->deoptimization_counter_, value);
+#endif
   }
 
   static const intptr_t kMaxInstructionCount = (1 << 16) - 1;
   intptr_t optimized_instruction_count() const {
+#if defined(DART_PRECOMPILED_RUNTIME)
+    UNREACHABLE();
+    return 0;
+#else
     return raw_ptr()->optimized_instruction_count_;
+#endif
   }
   void set_optimized_instruction_count(intptr_t value) const {
+#if defined(DART_PRECOMPILED_RUNTIME)
+    UNREACHABLE();
+#else
     ASSERT(value >= 0);
     if (value > kMaxInstructionCount) {
       value = kMaxInstructionCount;
     }
     StoreNonPointer(&raw_ptr()->optimized_instruction_count_,
                     static_cast<uint16_t>(value));
+#endif
   }
 
   intptr_t optimized_call_site_count() const {
+#if defined(DART_PRECOMPILED_RUNTIME)
+    return 0;
+#else
     return raw_ptr()->optimized_call_site_count_;
+#endif
   }
   void set_optimized_call_site_count(intptr_t value) const {
+#if defined(DART_PRECOMPILED_RUNTIME)
+    UNREACHABLE();
+#else
     ASSERT(value >= 0);
     if (value > kMaxInstructionCount) {
       value = kMaxInstructionCount;
     }
     StoreNonPointer(&raw_ptr()->optimized_call_site_count_,
                     static_cast<uint16_t>(value));
+#endif
   }
 
   bool IsOptimizable() const;
@@ -2785,9 +2850,20 @@ class Function : public Object {
   // VM instantiation. It is independent from presence of type feedback
   // (ic_data_array) and code, which may be loaded from a snapshot.
   void set_was_compiled(bool value) const {
+#if defined(DART_PRECOMPILED_RUNTIME)
+    UNREACHABLE();
+#else
     StoreNonPointer(&raw_ptr()->was_compiled_, value ? 1 : 0);
+#endif
+  }
+  bool was_compiled() const {
+#if defined(DART_PRECOMPILED_RUNTIME)
+    UNREACHABLE();
+    return true;
+#else
+    return raw_ptr()->was_compiled_ == 1;
+#endif
   }
-  bool was_compiled() const { return raw_ptr()->was_compiled_ == 1; }
 
   // static: Considered during class-side or top-level resolution rather than
   //         instance-side resolution.
@@ -4504,7 +4580,12 @@ class DeoptInfo : public AllStatic {
 class Code : public Object {
  public:
   RawInstructions* active_instructions() const {
+#if defined(DART_PRECOMPILED_RUNTIME)
+    UNREACHABLE();
+    return NULL;
+#else
     return raw_ptr()->active_instructions_;
+#endif
   }
 
   RawInstructions* instructions() const { return raw_ptr()->instructions_; }
@@ -4572,12 +4653,20 @@ class Code : public Object {
   }
 
   RawCodeSourceMap* code_source_map() const {
+#if defined(DART_PRECOMPILED_RUNTIME)
+    return CodeSourceMap::null();
+#else
     return raw_ptr()->code_source_map_;
+#endif
   }
 
   void set_code_source_map(const CodeSourceMap& code_source_map) const {
+#if defined(DART_PRECOMPILED_RUNTIME)
+    UNREACHABLE();
+#else
     ASSERT(code_source_map.IsOld());
     StorePointer(&raw_ptr()->code_source_map_, code_source_map.raw());
+#endif
   }
 
   // Used during reloading (see object_reload.cc). Calls Reset on all ICDatas
@@ -4588,7 +4677,12 @@ class Code : public Object {
 
   // Array of DeoptInfo objects.
   RawArray* deopt_info_array() const {
+#if defined(DART_PRECOMPILED_RUNTIME)
+    UNREACHABLE();
+    return NULL;
+#else
     return raw_ptr()->deopt_info_array_;
+#endif
   }
   void set_deopt_info_array(const Array& array) const;
 
@@ -4608,7 +4702,12 @@ class Code : public Object {
 
   void set_static_calls_target_table(const Array& value) const;
   RawArray* static_calls_target_table() const {
+#if defined(DART_PRECOMPILED_RUNTIME)
+    UNREACHABLE();
+    return NULL;
+#else
     return raw_ptr()->static_calls_target_table_;
+#endif
   }
 
   RawTypedData* GetDeoptInfoAtPc(uword pc,
@@ -4659,7 +4758,12 @@ class Code : public Object {
   void set_comments(const Comments& comments) const;
 
   RawObject* return_address_metadata() const {
+#if defined(DART_PRECOMPILED_RUNTIME)
+    UNREACHABLE();
+    return NULL;
+#else
     return raw_ptr()->return_address_metadata_;
+#endif
   }
   // Sets |return_address_metadata|.
   void SetPrologueOffset(intptr_t offset) const;
@@ -4694,11 +4798,20 @@ class Code : public Object {
   void DumpInlinedIntervals() const;
 
   RawLocalVarDescriptors* var_descriptors() const {
+#if defined(DART_PRECOMPILED_RUNTIME)
+    UNREACHABLE();
+    return NULL;
+#else
     return raw_ptr()->var_descriptors_;
+#endif
   }
   void set_var_descriptors(const LocalVarDescriptors& value) const {
+#if defined(DART_PRECOMPILED_RUNTIME)
+    UNREACHABLE();
+#else
     ASSERT(value.IsOld());
     StorePointer(&raw_ptr()->var_descriptors_, value.raw());
+#endif
   }
 
   // Will compute local var descriptors is necessary.
@@ -4779,14 +4892,26 @@ class Code : public Object {
   RawString* QualifiedName() const;
 
   int64_t compile_timestamp() const {
+#if defined(DART_PRECOMPILED_RUNTIME)
+    return 0;
+#else
     return raw_ptr()->compile_timestamp_;
+#endif
   }
 
   intptr_t lazy_deopt_pc_offset() const {
+#if defined(DART_PRECOMPILED_RUNTIME)
+    return 0;
+#else
     return raw_ptr()->lazy_deopt_pc_offset_;
+#endif
   }
   void set_lazy_deopt_pc_offset(intptr_t pc) const {
+#if defined(DART_PRECOMPILED_RUNTIME)
+    UNREACHABLE();
+#else
     StoreNonPointer(&raw_ptr()->lazy_deopt_pc_offset_, pc);
+#endif
   }
 
   bool IsAllocationStubCode() const;
@@ -4850,7 +4975,11 @@ class Code : public Object {
   static const intptr_t kEntrySize = sizeof(int32_t);  // NOLINT
 
   void set_compile_timestamp(int64_t timestamp) const {
+#if defined(DART_PRECOMPILED_RUNTIME)
+    UNREACHABLE();
+#else
     StoreNonPointer(&raw_ptr()->compile_timestamp_, timestamp);
+#endif
   }
 
   void SetActiveInstructions(RawInstructions* instructions) const;
@@ -5069,6 +5198,10 @@ class MegamorphicCache : public Object {
   static RawMegamorphicCache* New(const String& target_name,
                                   const Array& arguments_descriptor);
 
+#if defined(DART_PRECOMPILER)
+  static void ShareEmptyBuckets();
+#endif
+
   void EnsureCapacity() const;
 
   void Insert(const Smi& class_id, const Function& target) const;