updating Vulkan SDK from 1.4.304 to 1.4.309 and all my shaders fail vkCreateShadersEXT with VK_ERROR_UNKNOWN

[btipling]

Reverting to 1.4.304 resulted in my shaders working again. I am using the slangc.exe that ships with the Vulkan SDK. Are there any release notes for how to update to 1.4.309? I don't get any vulkan validation layer messages. I have no idea what is breaking. I have very basic slang shaders. https://github.com/btipling/Rosy/tree/master/src/shaders

I use shader objects like this: https://github.com/btipling/Rosy/blob/master/src/Engine/Graphics.cpp#L2964-L2983

Here's how I compile them, they compile fine https://github.com/btipling/Rosy/blob/master/src/shaders/script_compile.ps1#L19-L23

I am still using the Vulkan 1.3 API

Thanks

[btipling]

I'm going to spend some more time to try and figure this out today.

[btipling]

ok this one works

C:\VulkanSDK\1.4.304.0\Bin\slangc.exe basic.slang `
        -matrix-layout-column-major `
        -profile sm_6_6 `
        -target spirv `
        -o out/basic.spv

produces this (created via https://www.khronos.org/spirv/visualizer/)
https://gist.github.com/btipling/b442c584b571951d7858170c3bc17b41

this does not work

C:\VulkanSDK\1.4.309.0\Bin\slangc.exe basic.slang `
        -matrix-layout-column-major `
        -profile sm_6_6 `
        -target spirv `
        -o out/basic.spv

produces
https://gist.github.com/btipling/a60ae50ca572dc669013748cc9fa434c

Here's the copy pasted renderdoc shader object create info for my vertex and fragment shader:

https://gist.github.com/btipling/4d0377e69190d1f873375845f25e1f8d

[btipling]

So this is different:

OpEntryPoint Vertex %2 "main" %70 %472 %475 %478 %481 %484 %487 %490 %494 %498 %502 %506 %509 %57
OpEntryPoint Fragment %512 "main" %70 %604 %611 %762 %833 %584 %716 %656 %587 %629 %680 %841 %618 %641 %768

OpEntryPoint Vertex %2 "vertexMain" %70 %472 %475 %478 %481 %484 %487 %490 %494 %498 %502 %506 %509 %57
OpEntryPoint Fragment %512 "fragmentMain" %70 %625 %632 %764 %830 %557 %559 %561 %563 %565 %567 %570 %573 %576 %578

I remember previously being surprised to have to type the hard coded string "main" into my shader object create info. So I guess this bug was fixed and my work around is the issue.

Ok that fixed two of my shaders, but my shadow shader which doesn't have a fragment shader is still exiting an unknown error hrmm

[btipling]

Alright so that one still has the spirv with the "'main" where it ignores my slang function name:

  OpEntryPoint Vertex %2 "main" %24 %181 %13

even though:

OpName %2 "shadowVertexMain"

https://gist.github.com/btipling/65c9f20400ef664224377022557307d6

so I will continue to hard code "main" for the shader object create info even though my slang is:

[shader("vertex")]
DebugVertexStageOutput debugVertMain(uint uiVertexId: SV_VertexID)
{
....
}

ok well problem solved and I can build again with the updated slang compiler

[btipling]

This is my diff that fixed my issues https://github.com/btipling/Rosy/commit/87e8e58587dc3cc07994fa0e18b0434326570ca9