FlowGraphCompiler is not a visitor any longer. Start consolidating shared code between the x64 and …

runtime/vm/intermediate_language_x64.cc

 // Copyright (c) 2012, 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_X64.
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/intermediate_language.h"
 
 #include "lib/error.h"
@@ skipping 39 matching lines @@
      v2->AsUse()->definition()->temp_index();
 }
 
 
 void BindInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   computation()->EmitNativeCode(compiler);
   __ pushq(locs()->out().reg());
 }
 
 
+void GraphEntryInstr::PrepareEntry(FlowGraphCompiler* compiler) {
+  // Nothing to do.
+}
+
+
+void JoinEntryInstr::PrepareEntry(FlowGraphCompiler* compiler) {
+  __ Bind(compiler->GetBlockLabel(this));
+}
+
+
+void TargetEntryInstr::PrepareEntry(FlowGraphCompiler* compiler) {
+  __ Bind(compiler->GetBlockLabel(this));
+  if (HasTryIndex()) {
+    compiler->AddExceptionHandler(try_index(),
+                                  compiler->assembler()->CodeSize());
+  }
+}
+
+
 LocationSummary* ThrowInstr::MakeLocationSummary() const {
   const int kNumInputs = 0;
   const int kNumTemps = 0;
   return new LocationSummary(kNumInputs, kNumTemps);
 }
 
 
 void ThrowInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   ASSERT(exception()->IsUse());
   compiler->GenerateCallRuntime(cid(),
@@ skipping 1338 matching lines @@
   } else {
     UNREACHABLE();
   }
 }
 
 }  // namespace dart
 
 #undef __
 
 #endif  // defined TARGET_ARCH_X64