[stubs]: Convert FastNewContext stub to turbofan

src/full-codegen/ppc/full-codegen-ppc.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_PPC
 
 #include "src/ast/scopes.h"
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
@@ skipping 172 matching lines @@
       __ Push(info->scope()->GetScopeInfo(info->isolate()));
       __ CallRuntime(Runtime::kNewScriptContext);
       PrepareForBailoutForId(BailoutId::ScriptContext(),
                              BailoutState::TOS_REGISTER);
       // The new target value is not used, clobbering is safe.
       DCHECK_NULL(info->scope()->new_target_var());
     } else {
       if (info->scope()->new_target_var() != nullptr) {
         __ push(r6);  // Preserve new target.
       }
-      if (slots <= FastNewContextStub::kMaximumSlots) {
-        FastNewContextStub stub(isolate(), slots);
+      if (slots <= FastNewFunctionContextStub::kMaximumSlots) {
+        FastNewFunctionContextStub stub(isolate(), slots);
         __ CallStub(&stub);
-        // Result of FastNewContextStub is always in new space.
+        // Result of FastNewFunctionContextStub is always in new space.
         need_write_barrier = false;
       } else {
         __ push(r4);
         __ CallRuntime(Runtime::kNewFunctionContext);
       }
       if (info->scope()->new_target_var() != nullptr) {
         __ pop(r6);  // Preserve new target.
       }
     }
     function_in_register_r4 = false;
@@ skipping 3553 matching lines @@
 
   DCHECK(Assembler::IsCrSet(Assembler::instr_at(cmp_address)));
 
   DCHECK(interrupt_address ==
          isolate->builtins()->OnStackReplacement()->entry());
   return ON_STACK_REPLACEMENT;
 }
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_TARGET_ARCH_PPC