Move ReturnInstr to new scheme (x64 and ia32) and implement more code in new ia32 compiler.

runtime/vm/intermediate_language.h

Index: runtime/vm/intermediate_language.h
===================================================================
--- runtime/vm/intermediate_language.h	(revision 8165)
+++ runtime/vm/intermediate_language.h	(working copy)
@@ -1734,10 +1734,10 @@
 };
 
 
-class ReturnInstr : public Instruction {
+class ReturnInstr : public InstructionWithInputs {
  public:
   ReturnInstr(intptr_t token_index, Value* value)
-      : token_index_(token_index), value_(value) {
+      : InstructionWithInputs(), token_index_(token_index), value_(value) {
     ASSERT(value_ != NULL);
   }
 
@@ -1749,6 +1749,10 @@
   virtual Instruction* StraightLineSuccessor() const { return NULL; }
   virtual void SetSuccessor(Instruction* instr) { UNREACHABLE(); }
 
+  virtual LocationSummary* MakeLocationSummary() const;
+
+  virtual void EmitNativeCode(FlowGraphCompiler* compiler);
+
  private:
   const intptr_t token_index_;
   Value* value_;
@@ -1762,7 +1766,8 @@
   ThrowInstr(intptr_t token_index,
              intptr_t try_index,
              Value* exception)
-      : token_index_(token_index),
+      : InstructionWithInputs(),
+        token_index_(token_index),
         try_index_(try_index),
         exception_(exception),
         successor_(NULL) {
@@ -1802,7 +1807,8 @@
                intptr_t try_index,
                Value* exception,
                Value* stack_trace)
-      : token_index_(token_index),
+      : InstructionWithInputs(),
+        token_index_(token_index),
         try_index_(try_index),
         exception_(exception),
         stack_trace_(stack_trace),
@@ -1845,7 +1851,8 @@
 class BranchInstr : public InstructionWithInputs {
  public:
   explicit BranchInstr(Value* value)
-      : value_(value),
+      : InstructionWithInputs(),
+        value_(value),
         true_successor_(NULL),
         false_successor_(NULL) { }