[ic] Split megamorphic stub cache in two caches (for loads and for stores).

src/isolate.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/isolate.h"
 
 #include <stdlib.h>
 
 #include <fstream>  // NOLINT(readability/streams)
 #include <sstream>
@@ skipping 1840 matching lines @@
     : embedder_data_(),
       entry_stack_(NULL),
       stack_trace_nesting_level_(0),
       incomplete_message_(NULL),
       bootstrapper_(NULL),
       runtime_profiler_(NULL),
       compilation_cache_(NULL),
       counters_(NULL),
       logger_(NULL),
       stats_table_(NULL),
-      stub_cache_(NULL),
+      load_stub_cache_(NULL),
+      store_stub_cache_(NULL),
       code_aging_helper_(NULL),
       deoptimizer_data_(NULL),
       deoptimizer_lazy_throw_(false),
       materialized_object_store_(NULL),
       capture_stack_trace_for_uncaught_exceptions_(false),
       stack_trace_for_uncaught_exceptions_frame_limit_(0),
       stack_trace_for_uncaught_exceptions_options_(StackTrace::kOverview),
       keyed_lookup_cache_(NULL),
       context_slot_cache_(NULL),
       descriptor_lookup_cache_(NULL),
@@ skipping 217 matching lines @@
   delete regexp_stack_;
   regexp_stack_ = NULL;
 
   delete descriptor_lookup_cache_;
   descriptor_lookup_cache_ = NULL;
   delete context_slot_cache_;
   context_slot_cache_ = NULL;
   delete keyed_lookup_cache_;
   keyed_lookup_cache_ = NULL;
 
-  delete stub_cache_;
-  stub_cache_ = NULL;
+  delete load_stub_cache_;
+  load_stub_cache_ = NULL;
+  delete store_stub_cache_;
+  store_stub_cache_ = NULL;
   delete code_aging_helper_;
   code_aging_helper_ = NULL;
   delete stats_table_;
   stats_table_ = NULL;
 
   delete materialized_object_store_;
   materialized_object_store_ = NULL;
 
   delete logger_;
   logger_ = NULL;
@@ skipping 122 matching lines @@
   compilation_cache_ = new CompilationCache(this);
   keyed_lookup_cache_ = new KeyedLookupCache();
   context_slot_cache_ = new ContextSlotCache();
   descriptor_lookup_cache_ = new DescriptorLookupCache();
   unicode_cache_ = new UnicodeCache();
   inner_pointer_to_code_cache_ = new InnerPointerToCodeCache(this);
   global_handles_ = new GlobalHandles(this);
   eternal_handles_ = new EternalHandles();
   bootstrapper_ = new Bootstrapper(this);
   handle_scope_implementer_ = new HandleScopeImplementer(this);
-  stub_cache_ = new StubCache(this);
+  load_stub_cache_ = new StubCache(this, Code::LOAD_IC);
+  store_stub_cache_ = new StubCache(this, Code::STORE_IC);
   materialized_object_store_ = new MaterializedObjectStore(this);
   regexp_stack_ = new RegExpStack();
   regexp_stack_->isolate_ = this;
   date_cache_ = new DateCache();
   call_descriptor_data_ =
       new CallInterfaceDescriptorData[CallDescriptors::NUMBER_OF_DESCRIPTORS];
   cpu_profiler_ = new CpuProfiler(this);
   heap_profiler_ = new HeapProfiler(heap());
   interpreter_ = new interpreter::Interpreter(this);
 
@@ skipping 55 matching lines @@
   }
 
   // Initialize runtime profiler before deserialization, because collections may
   // occur, clearing/updating ICs.
   runtime_profiler_ = new RuntimeProfiler(this);
 
   // If we are deserializing, read the state into the now-empty heap.
   if (!create_heap_objects) {
     des->Deserialize(this);
   }
-  stub_cache_->Initialize();
+  load_stub_cache_->Initialize();
+  store_stub_cache_->Initialize();
   if (FLAG_ignition || serializer_enabled()) {
     interpreter_->Initialize();
   }
 
   // Finish initialization of ThreadLocal after deserialization is done.
   clear_pending_exception();
   clear_pending_message();
   clear_scheduled_exception();
 
   // Deserializing may put strange things in the root array's copy of the
@@ skipping 757 matching lines @@
   // Then check whether this scope intercepts.
   if ((flag & intercept_mask_)) {
     intercepted_flags_ |= flag;
     return true;
   }
   return false;
 }
 
 }  // namespace internal
 }  // namespace v8