Version 3.4.6

src/x64/full-codegen-x64.cc

Index: src/x64/full-codegen-x64.cc
diff --git a/src/x64/full-codegen-x64.cc b/src/x64/full-codegen-x64.cc
index fba6cc20434d30295c35c1e4675930248a152606..adfc72a26c868726de77286845a6fce1baae672d 100644
--- a/src/x64/full-codegen-x64.cc
+++ b/src/x64/full-codegen-x64.cc
@@ -564,10 +564,10 @@ void FullCodeGenerator::DoTest(Expression* condition,
                                Label* if_true,
                                Label* if_false,
                                Label* fall_through) {
-  ToBooleanStub stub;
+  ToBooleanStub stub(result_register());
   __ push(result_register());
   __ CallStub(&stub);
-  __ testq(rax, rax);
+  __ testq(result_register(), result_register());
   // The stub returns nonzero for true.
   Split(not_zero, if_true, if_false, fall_through);
 }