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

src/ia32/assembler-ia32.h

Index: src/ia32/assembler-ia32.h
diff --git a/src/ia32/assembler-ia32.h b/src/ia32/assembler-ia32.h
index 2ce41e0a5f7ef7909ed1f57221be1a28cf75e52f..55ab81452a602414a942b18ceef6ff05bf1747e9 100644
--- a/src/ia32/assembler-ia32.h
+++ b/src/ia32/assembler-ia32.h
@@ -493,14 +493,18 @@ class Assembler : public AssemblerBase {
                                           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) {
     ConstantPoolArray* constant_pool = code ? code->constant_pool() : NULL;
     return target_address_at(pc, constant_pool);
   }
   static inline void set_target_address_at(Address pc,
                                            Code* code,
-                                           Address target) {
+                                           Address target,
+                                           ICacheFlushMode icache_flush_mode =
+                                               FLUSH_ICACHE_IF_NEEDED) {
     ConstantPoolArray* constant_pool = code ? code->constant_pool() : NULL;
     set_target_address_at(pc, constant_pool, target);
   }