Add fast path smi comparison operators.

runtime/vm/intermediate_language_arm64.cc

Index: runtime/vm/intermediate_language_arm64.cc
diff --git a/runtime/vm/intermediate_language_arm64.cc b/runtime/vm/intermediate_language_arm64.cc
index d427823800cd181f1519c8af081168052cca7786..f43e2bb3448d499ed62f35760c8aa2794e5a5a1d 100644
--- a/runtime/vm/intermediate_language_arm64.cc
+++ b/runtime/vm/intermediate_language_arm64.cc
@@ -2844,6 +2844,24 @@ void CheckedSmiOpInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
     case Token::kBIT_XOR:
       __ eor(result, left, Operand(right));
       break;
+    case Token::kEQ:
+    case Token::kLT:
+    case Token::kLTE:
+    case Token::kGT:
+    case Token::kGTE: {
+      Label true_label, false_label, done;
+      BranchLabels labels = { &true_label, &false_label, &false_label };
+      Condition true_condition =
+          EmitSmiComparisonOp(compiler, locs(), op_kind());
+      EmitBranchOnCondition(compiler, true_condition, labels);
+      __ Bind(&false_label);
+      __ LoadObject(result, Bool::False());
+      __ b(&done);
+      __ Bind(&true_label);
+      __ LoadObject(result, Bool::True());
+      __ Bind(&done);
+      break;
+    }
     default:
       UNIMPLEMENTED();
   }