Drop IsPregenerated() and allow_stub_calls flag.

src/code-stubs.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 92 matching lines @@
 Handle<Code> PlatformCodeStub::GenerateCode(Isolate* isolate) {
   Factory* factory = isolate->factory();
 
   // Generate the new code.
   MacroAssembler masm(isolate, NULL, 256);
 
   {
     // Update the static counter each time a new code stub is generated.
     isolate->counters()->code_stubs()->Increment();
 
-    // Nested stubs are not allowed for leaves.
-    AllowStubCallsScope allow_scope(&masm, false);
-
     // Generate the code for the stub.
     masm.set_generating_stub(true);
     NoCurrentFrameScope scope(&masm);
     Generate(&masm);
   }
 
   // Create the code object.
   CodeDesc desc;
   masm.GetCode(&desc);
 
@@ skipping 15 matching lines @@
 }
 
 
 Handle<Code> CodeStub::GetCode(Isolate* isolate) {
   Factory* factory = isolate->factory();
   Heap* heap = isolate->heap();
   Code* code;
   if (UseSpecialCache()
       ? FindCodeInSpecialCache(&code, isolate)
       : FindCodeInCache(&code, isolate)) {
-    ASSERT(IsPregenerated(isolate) == code->is_pregenerated());
     ASSERT(GetCodeKind() == code->kind());
     return Handle<Code>(code);
   }
 
 #ifdef DEBUG
   VerifyPlatformFeatures(isolate);
 #endif
 
   {
     HandleScope scope(isolate);
@@ skipping 1044 matching lines @@
   InstallDescriptor(isolate, &stub3);
 }
 
 InternalArrayConstructorStub::InternalArrayConstructorStub(
     Isolate* isolate) {
   InternalArrayConstructorStubBase::GenerateStubsAheadOfTime(isolate);
 }
 
 
 } }  // namespace v8::internal