[turbofan] First step towards sanitizing for-in and making it optimizable.

src/arm64/full-codegen-arm64.cc

Index: src/arm64/full-codegen-arm64.cc
diff --git a/src/arm64/full-codegen-arm64.cc b/src/arm64/full-codegen-arm64.cc
index 9441cb7de8247e2eff8e1ff1a14ea43f513c2f64..0e6391f8eb3f53439915cd53a89fe6dd3ed2cd1c 100644
--- a/src/arm64/full-codegen-arm64.cc
+++ b/src/arm64/full-codegen-arm64.cc
@@ -1254,10 +1254,11 @@ void FullCodeGenerator::VisitForInStatement(ForInStatement* stmt) {
   // any more. If the property has been removed while iterating, we
   // just skip it.
   __ Push(x1, x3);
-  __ InvokeBuiltin(Builtins::FILTER_KEY, CALL_FUNCTION);
+  __ CallRuntime(Runtime::kForInFilter, 2);
   PrepareForBailoutForId(stmt->FilterId(), TOS_REG);
   __ Mov(x3, x0);
-  __ Cbz(x0, loop_statement.continue_label());
+  __ JumpIfRoot(x0, Heap::kUndefinedValueRootIndex,
+                loop_statement.continue_label());
 
   // Update the 'each' property or variable from the possibly filtered
   // entry in register x3.