[a64] Implement LStringCompareAndBranch

src/a64/lithium-a64.h

 // Copyright 2013 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 155 matching lines @@
   V(StoreGlobalGeneric)                         \
   V(StoreKeyedExternal)                         \
   V(StoreKeyedFixed)                            \
   V(StoreKeyedFixedDouble)                      \
   V(StoreKeyedGeneric)                          \
   V(StoreNamedField)                            \
   V(StoreNamedGeneric)                          \
   V(StringAdd)                                  \
   V(StringCharCodeAt)                           \
   V(StringCharFromCode)                         \
+  V(StringCompareAndBranch)                     \
   V(StringLength)                               \
   V(SubI)                                       \
   V(TaggedToI)                                  \
   V(ThisFunction)                               \
   V(Throw)                                      \
   V(ToFastProperties)                           \
   V(TransitionElementsKind)                     \
   V(TrapAllocationMemento)                      \
   V(Typeof)                                     \
   V(TypeofIsAndBranch)                          \
@@ skipping 2085 matching lines @@
     inputs_[0] = char_code;
   }
 
   LOperand* char_code() { return inputs_[0]; }
 
   DECLARE_CONCRETE_INSTRUCTION(StringCharFromCode, "string-char-from-code")
   DECLARE_HYDROGEN_ACCESSOR(StringCharFromCode)
 };
 
 
+class LStringCompareAndBranch: public LControlInstruction<2, 0> {
+ public:
+  LStringCompareAndBranch(LOperand* left, LOperand* right) {
+    inputs_[0] = left;
+    inputs_[1] = right;
+  }
+
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(StringCompareAndBranch,
+                               "string-compare-and-branch")
+  DECLARE_HYDROGEN_ACCESSOR(StringCompareAndBranch)
+
+  Token::Value op() const { return hydrogen()->token(); }
+
+  virtual void PrintDataTo(StringStream* stream);
+};
+
+
 class LStringLength: public LTemplateInstruction<1, 1, 0> {
  public:
   explicit LStringLength(LOperand* string) {
     inputs_[0] = string;
   }
 
   LOperand* string() { return inputs_[0]; }
 
   DECLARE_CONCRETE_INSTRUCTION(StringLength, "string-length")
   DECLARE_HYDROGEN_ACCESSOR(StringLength)
@@ skipping 464 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(LChunkBuilder);
 };
 
 #undef DECLARE_HYDROGEN_ACCESSOR
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_A64_LITHIUM_A64_H_