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

src/arm64/assembler-arm64.h

 // Copyright 2013 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_ARM64_ASSEMBLER_ARM64_H_
 #define V8_ARM64_ASSEMBLER_ARM64_H_
 
 #include <list>
 #include <map>
 
@@ skipping 770 matching lines @@
 
   // Return the address in the constant pool of the code target address used by
   // the branch/call instruction at pc.
   inline static Address target_pointer_address_at(Address pc);
 
   // Read/Modify the code target address in the branch/call instruction at pc.
   inline static Address target_address_at(Address pc,
                                           ConstantPoolArray* constant_pool);
   inline static void set_target_address_at(Address pc,
                                            ConstantPoolArray* constant_pool,
-                                           Address target);
+                                           Address target,
+                                           ICacheFlushMode icache_flush_mode =
+                                               FLUSH_ICACHE_IF_NEEDED);
   static inline Address target_address_at(Address pc, Code* code);
   static inline void set_target_address_at(Address pc,
                                            Code* code,
-                                           Address target);
+                                           Address target,
+                                           ICacheFlushMode icache_flush_mode =
+                                               FLUSH_ICACHE_IF_NEEDED);
 
   // Return the code target address at a call site from the return address of
   // that call in the instruction stream.
   inline static Address target_address_from_return_address(Address pc);
 
   // Given the address of the beginning of a call, return the address in the
   // instruction stream that call will return from.
   inline static Address return_address_from_call_start(Address pc);
 
   // This sets the branch destination (which is in the constant pool on ARM).
@@ skipping 1427 matching lines @@
 class EnsureSpace BASE_EMBEDDED {
  public:
   explicit EnsureSpace(Assembler* assembler) {
     assembler->CheckBufferSpace();
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM64_ASSEMBLER_ARM64_H_