Avoid flushing the icache unnecessarily when updating target addresses in code.

src/ic-inl.h

 // 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.
 
 #ifndef V8_IC_INL_H_
 #define V8_IC_INL_H_
 
 #include "ic.h"
 
 #include "compiler.h"
@@ skipping 76 matching lines @@
   // Convert target address to the code object. Code::GetCodeFromTargetAddress
   // is safe for use during GC where the map might be marked.
   Code* result = Code::GetCodeFromTargetAddress(target);
   ASSERT(result->is_inline_cache_stub());
   return result;
 }
 
 
 void IC::SetTargetAtAddress(Address address,
                             Code* target,
-                            ConstantPoolArray* constant_pool) {
+                            ConstantPoolArray* constant_pool,
+                            ICacheFlushMode icache_flush_mode) {
   ASSERT(target->is_inline_cache_stub() || target->is_compare_ic_stub());
   Heap* heap = target->GetHeap();
   Code* old_target = GetTargetAtAddress(address, constant_pool);
 #ifdef DEBUG
   // STORE_IC and KEYED_STORE_IC use Code::extra_ic_state() to mark
   // ICs as strict mode. The strict-ness of the IC must be preserved.
   if (old_target->kind() == Code::STORE_IC ||
       old_target->kind() == Code::KEYED_STORE_IC) {
     ASSERT(StoreIC::GetStrictMode(old_target->extra_ic_state()) ==
            StoreIC::GetStrictMode(target->extra_ic_state()));
   }
 #endif
   Assembler::set_target_address_at(
-      address, constant_pool, target->instruction_start());
+      address, constant_pool, target->instruction_start(), icache_flush_mode);
   if (heap->gc_state() == Heap::MARK_COMPACT) {
     heap->mark_compact_collector()->RecordCodeTargetPatch(address, target);
   } else {
     heap->incremental_marking()->RecordCodeTargetPatch(address, target);
   }
   PostPatching(address, target, old_target);
 }
 
 
 InlineCacheHolderFlag IC::GetCodeCacheForObject(Object* object) {
@@ skipping 45 matching lines @@
     }
     return handle(JSObject::cast(constructor->instance_prototype())->map());
   }
   return TypeToMap(type, isolate);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_IC_INL_H_