Added flag --inline_smi_string_hashcode and --inline_smi_string_hashcode_ratio to decide when/if sh…

runtime/vm/flow_graph_compiler_arm64.cc

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_ARM64.
 #if defined(TARGET_ARCH_ARM64)
 
 #include "vm/flow_graph_compiler.h"
 
 #include "vm/ast_printer.h"
@@ skipping 1285 matching lines @@
   const Array& arguments_descriptor =
       Array::ZoneHandle(zone(), ic_data.arguments_descriptor());
   ASSERT(!arguments_descriptor.IsNull() && (arguments_descriptor.Length() > 0));
   const MegamorphicCache& cache = MegamorphicCache::ZoneHandle(zone(),
       MegamorphicCacheTable::Lookup(isolate(), name, arguments_descriptor));
 
   __ Comment("MegamorphicCall");
   // Load receiver into R0.
   __ LoadFromOffset(R0, SP, (argument_count - 1) * kWordSize);
   Label done;
-  if (name.raw() == Symbols::hashCode().raw()) {
+  if (ShouldInlineSmiStringHashCode(ic_data)) {
     Label megamorphic_call;
     __ Comment("Inlined get:hashCode for Smi and OneByteString");
     __ tsti(R0, Immediate(kSmiTagMask));
     __ b(&done, EQ);  // Is Smi (result is receiver).
 
     __ CompareClassId(R0, kOneByteStringCid);
     __ b(&megamorphic_call, NE);
 
     // Use R5 (cache for megamorphic call) as scratch.
     __ mov(R5, R0);  // Preserve receiver in R5, result in R0.
@@ skipping 619 matching lines @@
 void ParallelMoveResolver::RestoreFpuScratch(FpuRegister reg) {
   __ PopDouble(reg);
 }
 
 
 #undef __
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM64