Remove redundant hydrogen- and lithium instruction for symbol comparison.

src/x64/lithium-x64.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 65 matching lines @@
   V(CheckSmi)                                   \
   V(ClampDToUint8)                              \
   V(ClampIToUint8)                              \
   V(ClampTToUint8)                              \
   V(ClassOfTest)                                \
   V(ClassOfTestAndBranch)                       \
   V(CmpConstantEq)                              \
   V(CmpConstantEqAndBranch)                     \
   V(CmpID)                                      \
   V(CmpIDAndBranch)                             \
-  V(CmpJSObjectEq)                              \
-  V(CmpJSObjectEqAndBranch)                     \
+  V(CmpObjectEq)                                \
+  V(CmpObjectEqAndBranch)                       \
   V(CmpMapAndBranch)                            \
-  V(CmpSymbolEq)                                \
-  V(CmpSymbolEqAndBranch)                       \
   V(CmpT)                                       \
   V(ConstantD)                                  \
   V(ConstantI)                                  \
   V(ConstantT)                                  \
   V(Context)                                    \
   V(DeleteProperty)                             \
   V(Deoptimize)                                 \
   V(DivI)                                       \
   V(DoubleToI)                                  \
   V(ElementsKind)                               \
@@ skipping 512 matching lines @@
   }
 
   DECLARE_CONCRETE_INSTRUCTION(UnaryMathOperation, "unary-math-operation")
   DECLARE_HYDROGEN_ACCESSOR(UnaryMathOperation)
 
   virtual void PrintDataTo(StringStream* stream);
   BuiltinFunctionId op() const { return hydrogen()->op(); }
 };
 
 
-class LCmpJSObjectEq: public LTemplateInstruction<1, 2, 0> {
+class LCmpObjectEq: public LTemplateInstruction<1, 2, 0> {
  public:
-  LCmpJSObjectEq(LOperand* left, LOperand* right) {
+  LCmpObjectEq(LOperand* left, LOperand* right) {
     inputs_[0] = left;
     inputs_[1] = right;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(CmpJSObjectEq, "cmp-jsobject-eq")
+  DECLARE_CONCRETE_INSTRUCTION(CmpObjectEq, "cmp-object-eq")
 };
 
 
-class LCmpJSObjectEqAndBranch: public LControlInstruction<2, 0> {
+class LCmpObjectEqAndBranch: public LControlInstruction<2, 0> {
  public:
-  LCmpJSObjectEqAndBranch(LOperand* left, LOperand* right) {
+  LCmpObjectEqAndBranch(LOperand* left, LOperand* right) {
     inputs_[0] = left;
     inputs_[1] = right;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(CmpJSObjectEqAndBranch,
-                               "cmp-jsobject-eq-and-branch")
-};
-
-
-class LCmpSymbolEq: public LTemplateInstruction<1, 2, 0> {
- public:
-  LCmpSymbolEq(LOperand* left, LOperand* right) {
-    inputs_[0] = left;
-    inputs_[1] = right;
-  }
-
-  DECLARE_CONCRETE_INSTRUCTION(CmpSymbolEq, "cmp-symbol-eq")
-};
-
-
-class LCmpSymbolEqAndBranch: public LControlInstruction<2, 0> {
- public:
-  LCmpSymbolEqAndBranch(LOperand* left, LOperand* right) {
-    inputs_[0] = left;
-    inputs_[1] = right;
-  }
-
-  DECLARE_CONCRETE_INSTRUCTION(CmpSymbolEqAndBranch, "cmp-symbol-eq-and-branch")
+  DECLARE_CONCRETE_INSTRUCTION(CmpObjectEqAndBranch,
+                               "cmp-object-eq-and-branch")
 };
 
 
 class LCmpConstantEq: public LTemplateInstruction<1, 1, 0> {
  public:
   explicit LCmpConstantEq(LOperand* left) {
     inputs_[0] = left;
   }
 
   DECLARE_CONCRETE_INSTRUCTION(CmpConstantEq, "cmp-constant-eq")
@@ skipping 1636 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(LChunkBuilder);
 };
 
 #undef DECLARE_HYDROGEN_ACCESSOR
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::int
 
 #endif  // V8_X64_LITHIUM_X64_H_