[arm64] Optimize fcmp when lhs operand is #0.0

src/compiler/arm/code-generator-arm.cc

Index: src/compiler/arm/code-generator-arm.cc
diff --git a/src/compiler/arm/code-generator-arm.cc b/src/compiler/arm/code-generator-arm.cc
index ead028c39792fff8ae268a5203d48503387cf5f1..6cb32f421ba020ff9bebdd6b3b59788482fc7514 100644
--- a/src/compiler/arm/code-generator-arm.cc
+++ b/src/compiler/arm/code-generator-arm.cc
@@ -224,8 +224,7 @@ Condition FlagsConditionToCondition(FlagsCondition condition) {
       return vs;
     case kNotOverflow:
       return vc;
-    case kUnorderedEqual:
-    case kUnorderedNotEqual:
+    default:
       break;
   }
   UNREACHABLE();