[Isolates] Merge crankshaft (r5922 from bleeding_edge).

src/token.h

Index: src/token.h
diff --git a/src/token.h b/src/token.h
index 6387676a2b232f7d98b5165befcf65364137b0cb..035e7b3477d94b7eda936d54a2bc15a833e3edd6 100644
--- a/src/token.h
+++ b/src/token.h
@@ -238,6 +238,40 @@ class Token {
     return EQ <= op && op <= IN;
   }
 
+  static bool IsOrderedCompareOp(Value op) {
+    return op == LT || op == LTE || op == GT || op == GTE;
+  }
+
+  static Value NegateCompareOp(Value op) {
+    ASSERT(IsCompareOp(op));
+    switch (op) {
+      case EQ: return NE;
+      case NE: return EQ;
+      case EQ_STRICT: return NE_STRICT;
+      case LT: return GTE;
+      case GT: return LTE;
+      case LTE: return GT;
+      case GTE: return LT;
+      default:
+        return op;
+    }
+  }
+
+  static Value InvertCompareOp(Value op) {
+    ASSERT(IsCompareOp(op));
+    switch (op) {
+      case EQ: return NE;
+      case NE: return EQ;
+      case EQ_STRICT: return NE_STRICT;
+      case LT: return GT;
+      case GT: return LT;
+      case LTE: return GTE;
+      case GTE: return LTE;
+      default:
+        return op;
+    }
+  }
+
   static bool IsBitOp(Value op) {
     return (BIT_OR <= op && op <= SHR) || op == BIT_NOT;
   }