Revert r11772: Add check for non-smi to the IL and use it for class checks.

runtime/vm/intermediate_language.h

Index: runtime/vm/intermediate_language.h
===================================================================
--- runtime/vm/intermediate_language.h	(revision 11773)
+++ runtime/vm/intermediate_language.h	(working copy)
@@ -1294,7 +1294,6 @@
   M(SmiToDouble, SmiToDoubleComp)                                              \
   M(CheckClass, CheckClassComp)                                                \
   M(CheckSmi, CheckSmiComp)                                                    \
-  M(CheckNonSmi, CheckNonSmiComp)                                              \
   M(Constant, ConstantComp)                                                    \
   M(CheckEitherNonSmi, CheckEitherNonSmiComp)                                  \
   M(UnboxedDoubleBinaryOp, UnboxedDoubleBinaryOpComp)                          \
@@ -3249,35 +3248,6 @@
 };
 
 
-class CheckNonSmiComp : public TemplateComputation<1> {
- public:
-  CheckNonSmiComp(Value* value, intptr_t original_deopt_id)
-      : original_deopt_id_(original_deopt_id) {
-    ASSERT(value != NULL);
-    ASSERT(original_deopt_id != Isolate::kNoDeoptId);
-    inputs_[0] = value;
-  }
-
-  DECLARE_COMPUTATION(CheckNonSmi)
-
-  virtual bool CanDeoptimize() const { return true; }
-  virtual intptr_t ResultCid() const { return kIllegalCid; }
-
-  virtual bool AttributesEqual(Computation* other) const { return true; }
-
-  virtual bool HasSideEffect() const { return false; }
-
-  Value* value() const { return inputs_[0]; }
-
-  virtual intptr_t deopt_id() const { return original_deopt_id_; }
-
- private:
-  const intptr_t original_deopt_id_;
-
-  DISALLOW_COPY_AND_ASSIGN(CheckNonSmiComp);
-};
-
-
 class CheckArrayBoundComp : public TemplateComputation<2> {
  public:
   CheckArrayBoundComp(Value* array,