[SPIR-V] Generated "OpConstantNull %type_2d_image" when using with RayQuery

[Evil-Ryu]

Hi, I'm compling HLSL to spirv using dxc, got this error:

fatal error: generated SPIR-V is invalid: OpConstantNull Result Type <id> '7[%type_2d_image]' cannot have a null value.
  %50 = OpConstantNull %type_2d_image

The command line to compile The Shader:
dxc.exe -Zpr -Od -T ps_6_5 -E main_00000000_00000000 -spirv -fvk-use-dx-position-w -fspv-reflect -fspv-target-env=vulkan1.2 test.hlsl

I used a struct which contains a texture, and declared the struct inside main function.
The error happens only when I also used RayQuery related stuff.

[ehsannas]

Thanks for reporting @Evil-Ryu.

[ehsannas]

For reference, this is the shader:

struct A
{
    Texture2D T;
};
 
RaytracingAccelerationStructure TLAS;
Texture2D g_texture;
SamplerState g_sampler;
 
void main_00000000_00000000(out float4 OutColor : SV_Target0) {
    const uint InstanceInclusionMask = 1;
    A a;   // this caused the invalid spirv, but if you delete all rayquery stuff, it's fine
    RayDesc Ray;
    Ray.Origin = float3(0.F, 0.F, -1.F);
    Ray.Direction = float3(0., 0., 1.);
    Ray.TMin = 0.F;
    Ray.TMax = 1.0E+6F;
    RayQuery<RAY_FLAG_FORCE_OPAQUE  | RAY_FLAG_ACCEPT_FIRST_HIT_AND_END_SEARCH> q;
    q.TraceRayInline(TLAS, RAY_FLAG_FORCE_OPAQUE  | RAY_FLAG_ACCEPT_FIRST_HIT_AND_END_SEARCH, InstanceInclusionMask, Ray);
    q.Proceed();
    if (q.CommittedStatus() == COMMITTED_TRIANGLE_HIT) {
        OutColor = g_texture.Sample(g_sampler, float2(0, 0));
        OutColor.r += q.CommittedRayT();
    }
    else {
        OutColor = float4(1.F, 0.F, 0.F, 1.F);
    }
}

[sudonatalie]

No longer able to repro, it looks like this issue has since been fixed (could be the related to the recent ray tracing capability fixes or the struct buffer fixes).