fossilize-synth - Can't create shader with

[spencer-lunarg]

I hit this as trying to instrument this pipeline (from a a vkd3d title using Descriptor Buffers on Intel Mesa) with GPU-AV running on caused the driver to crash and wanted to create a repro, but hitting

$ fossilize-synth --frag dump_frag.spv --output repro.foz

Fossilize ERROR: Overlap in descriptor type for binding (2, 0) (was 6, now 7).

I pulled out the shader and seems valid https://godbolt.org/z/cadKMvben

I see this is around the whole HLSL having CBV vs SSBO stuff

layout(set = 2, binding = 0, std430) restrict readonly buffer SSBO {
    uint _m0[];
} _23[];

layout(set = 2, binding = 0, std430) restrict readonly buffer _26_29 {
    uvec4 _m0[];
} _29[];

layout(set = 2, binding = 0, std140) uniform BindlessCBV {
    vec4 _m0[4096];
} _36[];

not sure who is at fault here, but if this is valid SPIR-V, I guess not sure if this is a limitation of fossilize-synth... but at the same time, not sure what the VK_EXT_descriptor_buffer API side looks like

[HansKristian-Work]

fossilize-synth does not know how to use mutable descriptor type. It'd be kinda awkward to support.

It'd be easier to support if synth emits descriptor heap PSOs instead of legacy model, something to consider I guess ...