Fastpath some spread-call desugaring.

src/crankshaft/s390/lithium-codegen-s390.cc

Index: src/crankshaft/s390/lithium-codegen-s390.cc
diff --git a/src/crankshaft/s390/lithium-codegen-s390.cc b/src/crankshaft/s390/lithium-codegen-s390.cc
index 3421623eec82e3e7a593c8ba53a0e858ccca3e44..0a74bcb49e6f9391495b28b141b713c167874487 100644
--- a/src/crankshaft/s390/lithium-codegen-s390.cc
+++ b/src/crankshaft/s390/lithium-codegen-s390.cc
@@ -3009,11 +3009,11 @@ void LCodeGen::DoLoadKeyedFixedArray(LLoadKeyed* instr) {
     __ bne(&done);
     if (info()->IsStub()) {
       // A stub can safely convert the hole to undefined only if the array
-      // protector cell contains (Smi) Isolate::kArrayProtectorValid. Otherwise
+      // protector cell contains (Smi) Isolate::kProtectorValid. Otherwise
       // it needs to bail out.
       __ LoadRoot(result, Heap::kArrayProtectorRootIndex);
       __ LoadP(result, FieldMemOperand(result, Cell::kValueOffset));
-      __ CmpSmiLiteral(result, Smi::FromInt(Isolate::kArrayProtectorValid), r0);
+      __ CmpSmiLiteral(result, Smi::FromInt(Isolate::kProtectorValid), r0);
       DeoptimizeIf(ne, instr, DeoptimizeReason::kHole);
     }
     __ LoadRoot(result, Heap::kUndefinedValueRootIndex);