How can I disable that behaviour?
I'm porting v8 to new architecture and I don't want to implement 
Hydrogen/Lithium before full-codegen.

On Tuesday, May 24, 2016 at 2:16:25 PM UTC+6, Ben Noordhuis wrote:
>
> On Tue, May 24, 2016 at 9:59 AM,  <[email protected] <javascript:>> 
> wrote: 
> > Hi all. 
> > 
> > My full-codegen.cc: 
> > 
> > bool FullCodeGenerator::MakeCode(CompilationInfo* info) { 
> >   UNREACHABLE(); 
> >   Isolate* isolate = info->isolate(); 
> >   ... 
> > 
> > I run d8 and I see in call stack 
> > 
> > #5  0x000000000258c1f0 in 
> > v8::internal::LChunkBuilder::DoAllocate(v8::internal::HAllocate*) () 
> > #6  0x00000000012b74e8 in 
> > v8::internal::HAllocate::CompileToLithium(v8::internal::LChunkBuilder*) 
> () 
> > #7  0x00000000025951f8 in 
> > 
> v8::internal::LChunkBuilder::VisitInstruction(v8::internal::HInstruction*) 
> > () 
> > #8  0x0000000002597b68 in 
> > v8::internal::LChunkBuilder::DoBasicBlock(v8::internal::HBasicBlock*, 
> > v8::internal::HBasicBlock*) () 
> > #9  0x000000000258bb28 in v8::internal::LChunkBuilder::Build() () 
> > #10 0x000000000147dd10 in 
> > v8::internal::LChunk::NewChunk(v8::internal::HGraph*) () 
> > #11 0x0000000000d843e8 in 
> > 
> _INTERNAL_22_code_stubs_hydrogen_cc_b1190256::v8::internal::OptimizeGraph(_INTERNAL_22_code_stubs_hydrogen_cc_b1190256::v8::internal::HGraph*)
>  
>
> > () 
> > #12 0x0000000000d56e78 in 
> > v8::internal::ArrayNoArgumentConstructorStub::GenerateCode() () 
> > #13 0x0000000000d0e5c8 in v8::internal::CodeStub::GetCode() () 
> > #14 0x00000000026012a0 in void 
> > 
> _INTERNAL_17_code_stubs_e2k_cc_8d6fa455::v8::internal::ArrayConstructorStubAheadOfTimeHelper<_INTERNAL_17_code_stubs_e2k_cc_8d6fa455::v8::internal::ArrayNoArgumentConstructorStub>(_INTERNAL_17_code_stubs_e2k_cc_8d6fa455::v8::internal::Isolate*)
>  
>
> > () 
> > #15 0x00000000025fe9f8 in 
> > v8::internal::CodeStub::GenerateStubsAheadOfTime(v8::internal::Isolate*) 
> () 
> > #16 0x0000000001814db8 in v8::internal::Heap::CreateFixedStubs() () 
> > #17 0x0000000001811e28 in v8::internal::Heap::CreateInitialObjects() () 
> > #18 0x00000000017e5ef8 in v8::internal::Heap::CreateHeapObjects() () 
> > #19 0x0000000001b67b50 in 
> > v8::internal::Isolate::Init(v8::internal::Deserializer*) () 
> > #20 0x0000000000aacba0 in v8::Isolate::New(v8::Isolate::CreateParams 
> const&) 
> > () 
> > #21 0x0000000000913ed8 in v8::Shell::Main(int, char**) () 
> > #22 0x0000000000908fc8 in main () 
> > 
> > Why Lithium code's is called? Is Lithium a part of crankshaft compiler, 
> > right? 
> > What is code compiled before full-codegen? 
>
> Those are the stubs for `new Array()`, `new Array(42)`, etc.  Yes, 
> they are generated by Hydrogen/Lithium. 
>

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