Fastpath some spread-call desugaring.

src/code-stub-assembler.cc

Index: src/code-stub-assembler.cc
diff --git a/src/code-stub-assembler.cc b/src/code-stub-assembler.cc
index 77191e401fe21f9f731830015a940dfcb7bf7f93..a61919835ab3e8f1de03f39e6e14a5312281b3fa 100644
--- a/src/code-stub-assembler.cc
+++ b/src/code-stub-assembler.cc
@@ -5552,7 +5552,7 @@ void CodeStubAssembler::HandleLoadICHandlerCase(
         GotoUnless(
             WordEqual(
                 LoadObjectField(protector_cell, PropertyCell::kValueOffset),
-                SmiConstant(Smi::FromInt(Isolate::kArrayProtectorValid))),
+                SmiConstant(Smi::FromInt(Isolate::kProtectorValid))),
             miss);
         Return(UndefinedConstant());
       }
@@ -8597,7 +8597,7 @@ compiler::Node* CodeStubAssembler::InstanceOf(compiler::Node* object,
   GotoUnless(
       WordEqual(LoadObjectField(LoadRoot(Heap::kHasInstanceProtectorRootIndex),
                                 PropertyCell::kValueOffset),
-                SmiConstant(Smi::FromInt(Isolate::kArrayProtectorValid))),
+                SmiConstant(Smi::FromInt(Isolate::kProtectorValid))),
       &return_runtime);
 
   // Check if {callable} is a valid receiver.