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

runtime/vm/intermediate_language_x64.cc

Index: runtime/vm/intermediate_language_x64.cc
===================================================================
--- runtime/vm/intermediate_language_x64.cc	(revision 8206)
+++ runtime/vm/intermediate_language_x64.cc	(working copy)
@@ -57,6 +57,25 @@
 }
 
 
+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;