Generate some intrinsics using our IR.

runtime/vm/intermediate_language.h

Index: runtime/vm/intermediate_language.h
===================================================================
--- runtime/vm/intermediate_language.h	(revision 39651)
+++ runtime/vm/intermediate_language.h	(working copy)
@@ -1909,12 +1909,15 @@
 
 class ParameterInstr : public Definition {
  public:
-  ParameterInstr(intptr_t index, BlockEntryInstr* block)
-      : index_(index), block_(block) { }
+  ParameterInstr(intptr_t index,
+                 BlockEntryInstr* block,
+                 Register base_reg = FPREG)
+      : index_(index), base_reg_(base_reg), block_(block) { }
 
   DECLARE_INSTRUCTION(Parameter)
 
   intptr_t index() const { return index_; }
+  Register base_reg() const { return base_reg_; }
 
   // Get the block entry for that instruction.
   virtual BlockEntryInstr* GetBlock() const { return block_; }
@@ -1947,6 +1950,7 @@
   virtual void RawSetInputAt(intptr_t i, Value* value) { UNREACHABLE(); }
 
   const intptr_t index_;
+  const Register base_reg_;
   BlockEntryInstr* block_;
 
   DISALLOW_COPY_AND_ASSIGN(ParameterInstr);
@@ -1987,8 +1991,8 @@
 
 class ReturnInstr : public TemplateInstruction<1> {
  public:
-  ReturnInstr(intptr_t token_pos, Value* value)
-      : token_pos_(token_pos) {
+  ReturnInstr(intptr_t token_pos, Value* value, bool is_intrinsic = false)
+      : token_pos_(token_pos), is_intrinsic_(is_intrinsic) {
     SetInputAt(0, value);
   }
 
@@ -2013,6 +2017,7 @@
 
  private:
   const intptr_t token_pos_;
+  bool is_intrinsic_;
 
   DISALLOW_COPY_AND_ASSIGN(ReturnInstr);
 };
@@ -7675,7 +7680,6 @@
  public:
   CheckSmiInstr(Value* value, intptr_t original_deopt_id, intptr_t token_pos)
       : token_pos_(token_pos) {
-    ASSERT(original_deopt_id != Isolate::kNoDeoptId);
     SetInputAt(0, value);
     deopt_id_ = original_deopt_id;
   }