[builtins] FastNewFunctionContextStub becomes a builtin

src/full-codegen/arm64/full-codegen-arm64.cc

Index: src/full-codegen/arm64/full-codegen-arm64.cc
diff --git a/src/full-codegen/arm64/full-codegen-arm64.cc b/src/full-codegen/arm64/full-codegen-arm64.cc
index c4ecd9c9619fc877996921070767dd61650888ce..9296cc6364652808bf3bd1b288a73d5a2ee48a57 100644
--- a/src/full-codegen/arm64/full-codegen-arm64.cc
+++ b/src/full-codegen/arm64/full-codegen-arm64.cc
@@ -4,15 +4,16 @@
 
 #if V8_TARGET_ARCH_ARM64
 
-#include "src/full-codegen/full-codegen.h"
 #include "src/ast/compile-time-value.h"
 #include "src/ast/scopes.h"
+#include "src/builtins/builtins-constructor.h"
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
 #include "src/compilation-info.h"
 #include "src/compiler.h"
 #include "src/debug/debug.h"
+#include "src/full-codegen/full-codegen.h"
 #include "src/ic/ic.h"
 
 #include "src/arm64/code-stubs-arm64.h"
@@ -201,11 +202,13 @@ void FullCodeGenerator::Generate() {
       if (info->scope()->new_target_var() != nullptr) {
         __ Push(x3);  // Preserve new target.
       }
-      if (slots <= FastNewFunctionContextStub::MaximumSlots()) {
-        FastNewFunctionContextStub stub(isolate(), info->scope()->scope_type());
+      if (slots <=
+          ConstructorBuiltinsAssembler::MaximumFunctionContextSlots()) {
+        Callable callable = CodeFactory::FastNewFunctionContext(
+            isolate(), info->scope()->scope_type());
         __ Mov(FastNewFunctionContextDescriptor::SlotsRegister(), slots);
-        __ CallStub(&stub);
-        // Result of FastNewFunctionContextStub is always in new space.
+        __ Call(callable.code(), RelocInfo::CODE_TARGET);
+        // Result of the FastNewFunctionContext builtin is always in new space.
         need_write_barrier = false;
       } else {
         __ Push(x1);