Split HCompareGeneric in a test and a branch part.

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 0ccbeb8fc80889f0394ff5e69a472507b475d151..4e1e8bdd02e60024e3b435d4abe090b600bf14ef 100644
--- a/src/x64/lithium-x64.h
+++ b/src/x64/lithium-x64.h
@@ -44,6 +44,7 @@ class LCodeGen;
   V(AccessArgumentsAt)                          \
   V(AddI)                                       \
   V(Allocate)                                   \
+  V(AndBranch)                                  \
   V(ApplyArguments)                             \
   V(ArgumentsElements)                          \
   V(ArgumentsLength)                            \
@@ -1229,6 +1230,23 @@ class LBranch V8_FINAL : public LControlInstruction<1, 0> {
 };
 
 
+class LAndBranch V8_FINAL : public LControlInstruction<1, 0> {
+ public:
+  LAndBranch(LOperand* value, Token::Value op) : op_(op) {
+    inputs_[0] = value;
+  }
+
+  LOperand* value() { return inputs_[0]; }
+  Token::Value op() { return op_; }
+
+  DECLARE_CONCRETE_INSTRUCTION(AndBranch, "and-branch")
+  DECLARE_HYDROGEN_ACCESSOR(AndBranch)
+
+ private:
+  Token::Value op_;
+};
+
+
 class LDebugBreak V8_FINAL : public LTemplateInstruction<0, 0, 0> {
  public:
   DECLARE_CONCRETE_INSTRUCTION(DebugBreak, "break")