Multiple GDV: ignore non-inlineable candidates

[EgorBo]

Contributes to #86769

The current logic used to give up on all of them if at least one of the candidates was non-inlineable (for any reason)
E.g.:

public interface IValue
{
    int GetValue();
}

public class MyClass1 : IValue
{
    public int GetValue() => 10;
}

public class MyClass2 : IValue
{
    [MethodImpl(MethodImplOptions.NoInlining)]
    public int GetValue() => 50;
}

public class MyClass3 : IValue
{
    public int GetValue() => 100;
}

Was:

; Assembly listing for method Program:Test(IValue):int
       sub      rsp, 40
       mov      r11, 0x7FFBC9420318
       call     [r11]IValue:GetValue():int:this
       nop      
       add      rsp, 40
       ret      
; Total bytes of code 23

Now:

; Assembly listing for method Program:Test(IValue):int
       sub      rsp, 40
       mov      r11, 0x7FFBC9FE8B40
       cmp      qword ptr [rcx], r11       ;; is it MyClass1 ?
       jne      SHORT G_M7592_IG04
       mov      eax, 10
       jmp      SHORT G_M7592_IG07
G_M7592_IG04:
       mov      rax, 0x7FFBC9FE8ED0
       cmp      qword ptr [rcx], rax       ;; is it MyClass3 ?
       jne      SHORT G_M7592_IG06
       mov      eax, 100
       jmp      SHORT G_M7592_IG07
G_M7592_IG06:
       mov      r11, 0x7FFBC9400318
       call     [r11]IValue:GetValue():int:this  ;; no longer cold, we have MyClass2
G_M7592_IG07:
       nop      
       add      rsp, 40
       ret      
; Total bytes of code 67

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Issue Details

---

Contributes to #86769

The current logic used to give on all of them if at least one of the candidates were non inlineable (for any reason)
E.g.:

public interface IValue
{
    int GetValue();
}

public class MyClass1 : IValue
{
    public int GetValue() => 10;
}

public class MyClass2 : IValue
{
    [MethodImpl(MethodImplOptions.NoInlining)]
    public int GetValue() => 50;
}

public class MyClass3 : IValue
{
    public int GetValue() => 100;
}

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

[EgorBo]

@AndyAyersMS PTAL

[EgorBo]

@AndyAyersMS Thanks! Good idea, not sure why I decided to introduce those struct copies. Addressed via 2d3395e - it also simplified the code.

[AndyAyersMS]

Looks good