Refactoring and cleanup of control instructions

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 5397c5224d176d283a90cabc76794bd1def81293..6efa9d3255279e58e0408d89451eeb1796823029 100644
--- a/src/x64/lithium-x64.h
+++ b/src/x64/lithium-x64.h
@@ -81,7 +81,7 @@ class LCodeGen;
   V(ClampTToUint8)                              \
   V(ClassOfTestAndBranch)                       \
   V(CmpConstantEqAndBranch)                     \
-  V(CmpIDAndBranch)                             \
+  V(CompareNumericAndBranch)                    \
   V(CmpObjectEqAndBranch)                       \
   V(CmpMapAndBranch)                            \
   V(CmpT)                                       \
@@ -673,9 +673,9 @@ class LMulI: public LTemplateInstruction<1, 2, 0> {
 };
 
 
-class LCmpIDAndBranch: public LControlInstruction<2, 0> {
+class LCompareNumericAndBranch: public LControlInstruction<2, 0> {
  public:
-  LCmpIDAndBranch(LOperand* left, LOperand* right) {
+  LCompareNumericAndBranch(LOperand* left, LOperand* right) {
     inputs_[0] = left;
     inputs_[1] = right;
   }
@@ -683,8 +683,9 @@ class LCmpIDAndBranch: public LControlInstruction<2, 0> {
   LOperand* left() { return inputs_[0]; }
   LOperand* right() { return inputs_[1]; }
 
-  DECLARE_CONCRETE_INSTRUCTION(CmpIDAndBranch, "cmp-id-and-branch")
-  DECLARE_HYDROGEN_ACCESSOR(CompareIDAndBranch)
+  DECLARE_CONCRETE_INSTRUCTION(CompareNumericAndBranch,
+                               "compare-numeric-and-branch")
+  DECLARE_HYDROGEN_ACCESSOR(CompareNumericAndBranch)
 
   Token::Value op() const { return hydrogen()->token(); }
   bool is_double() const {