NativeAOT: Type is not pre-initialized

[EgorBo]

struct MyStruct
{
    public string Name;
}

class Program
{
    static readonly MyStruct MyStr = new() { Name = "Hey!" };

    [MethodImpl(MethodImplOptions.NoInlining)]
    static MyStruct Test() => MyStr;
}

Codegen for Test():

; Method Program:Test():Program+MyStruct
       4883EC28             sub      rsp, 40
       E800000000           call     CORINFO_HELP_READYTORUN_GCSTATIC_BASE
       488B4010             mov      rax, gword ptr [rax+10H]
       4883C428             add      rsp, 40
       C3                   ret      
; Total bytes of code: 18

It seems that _compilation.HasLazyStaticConstructor(field.OwningType) returns true for Program so MyStr field is not pre-computed despite being a simple struct + frozen string literal.

cc @MichalStrehovsky

[ghost]

Tagging subscribers to this area: @JulieLeeMSFT, @jakobbotsch, @kunalspathak
See info in area-owners.md if you want to be subscribed.

Issue Details

---

internal class Program
{
    struct MyStruct
    {
        public string Name;
    }

    static readonly MyStruct MyStr = new() { Name = "Hey!" };

    [MethodImpl(MethodImplOptions.NoInlining)]
    static MyStruct Test() => MyStr;
}

Codegen for Test():

; Method Program:Test():Program+MyStruct
G_M41189_IG01:              ;; offset=0000H
       4883EC28             sub      rsp, 40
G_M41189_IG02:              ;; offset=0004H
       E800000000           call     CORINFO_HELP_READYTORUN_GCSTATIC_BASE
       488B4010             mov      rax, gword ptr [rax+10H]
G_M41189_IG03:              ;; offset=000DH
       4883C428             add      rsp, 40
       C3                   ret      
; Total bytes of code: 18

It seems that _compilation.HasLazyStaticConstructor(field.OwningType) returns true for Program

cc @MichalStrehovsky

Author:	EgorBo
Assignees:	-
Labels:	area-CodeGen-coreclr
Milestone:	-

[ghost]

Tagging subscribers to this area: @agocke, @MichalStrehovsky, @jkotas
See info in area-owners.md if you want to be subscribed.

Issue Details

---

internal class Program
{
    struct MyStruct
    {
        public string Name;
    }

    static readonly MyStruct MyStr = new() { Name = "Hey!" };

    [MethodImpl(MethodImplOptions.NoInlining)]
    static MyStruct Test() => MyStr;
}

Codegen for Test():

; Method Program:Test():Program+MyStruct
G_M41189_IG01:              ;; offset=0000H
       4883EC28             sub      rsp, 40
G_M41189_IG02:              ;; offset=0004H
       E800000000           call     CORINFO_HELP_READYTORUN_GCSTATIC_BASE
       488B4010             mov      rax, gword ptr [rax+10H]
G_M41189_IG03:              ;; offset=000DH
       4883C428             add      rsp, 40
       C3                   ret      
; Total bytes of code: 18

It seems that _compilation.HasLazyStaticConstructor(field.OwningType) returns true for Program

cc @MichalStrehovsky

Author:	EgorBo
Assignees:	-
Labels:	untriaged, area-NativeAOT-coreclr
Milestone:	-

[MichalStrehovsky]

Value types are represented as byte arrays within the interpreter. It's hard to add object references to it.

The features the interpreter supports follow the pareto principle.

[jkotas]

Similar issue for initialization of reference types: #82993