Remove HCheckSmi, LCheckSmi and rename LCheckSmiAndReturn to LCheckSmi.

src/x64/lithium-x64.h

Index: src/x64/lithium-x64.h
diff --git a/src/x64/lithium-x64.h b/src/x64/lithium-x64.h
index 4fae8db55c869dfc3f18ec154e2e124635d4f441..c295e3478dccacc8a5f83d2cecd086a0a4e4c62a 100644
--- a/src/x64/lithium-x64.h
+++ b/src/x64/lithium-x64.h
@@ -76,7 +76,6 @@ class LCodeGen;
   V(CheckNonSmi)                                \
   V(CheckPrototypeMaps)                         \
   V(CheckSmi)                                   \
-  V(CheckSmiAndReturn)                          \
   V(ClampDToUint8)                              \
   V(ClampIToUint8)                              \
   V(ClampTToUint8)                              \
@@ -2291,7 +2290,7 @@ class LCheckPrototypeMaps: public LTemplateInstruction<0, 0, 1> {
 };
 
 
-class LCheckSmi: public LTemplateInstruction<0, 1, 0> {
+class LCheckSmi: public LTemplateInstruction<1, 1, 0> {
  public:
   explicit LCheckSmi(LOperand* value) {
     inputs_[0] = value;
@@ -2303,18 +2302,6 @@ class LCheckSmi: public LTemplateInstruction<0, 1, 0> {
 };
 
 
-class LCheckSmiAndReturn: public LTemplateInstruction<1, 1, 0> {
- public:
-  explicit LCheckSmiAndReturn(LOperand* value) {
-    inputs_[0] = value;
-  }
-
-  LOperand* value() { return inputs_[0]; }
-
-  DECLARE_CONCRETE_INSTRUCTION(CheckSmiAndReturn, "check-smi-and-return")
-};
-
-
 class LClampDToUint8: public LTemplateInstruction<1, 1, 0> {
  public:
   explicit LClampDToUint8(LOperand* unclamped) {