Simplifies emission of the blocks themselves (including inserting blocks
into the function's block list in the correct order), as well as phi after
the branching.
Also fixes 64bpp storing with blending in the fragment shader interlock
render backend implementation (had a typo that caused the high 32 bits to
overwrite the low ones).
Functional changes:
- Enable only actually used features, as drivers may take more optimal
paths when certain features are disabled.
- Support VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE.
- Fix the separateStencilMaskRef check doing the opposite.
- Support shaderRoundingModeRTEFloat32.
- Fix vkGetDeviceBufferMemoryRequirements pointer not passed to the Vulkan
Memory Allocator.
Stylistic changes:
- Move all device extensions, properties and features to one structure,
especially simplifying portability subset feature checks, and also making
it easier to request new extension functionality in the future.
- Remove extension suffixes from usage of promoted extensions.
Block members can be decorated with Invariant only since SPIR-V 1.5 Revision 2. In earlier versions, Invariant can be used only for variables. Mesa warns about this.
Also fixes addressing of MSAA samples 2 and 3 for 64bpp color render targets in the ROV RB implementation on Direct3D 12.
Additionally, with FSI/ROV, alpha test and alpha to coverage are done only if the render target 0 was dynamically written to (according to the Direct3D 9 rules for writing to color render targets, though not sure if they actually apply to the alpha tests on Direct3D 9, but for safety).
There is also some code cleanup for things spotted during the development of the feature.
For more optimal usage of exports and the parameter cache on the host regardless of how effective the optimizations in the host GPU driver are. Also reserve space for Vulkan/Metal/D3D11-specific HostVertexShaderTypes to use one more bit for the host vertex shader type in the shader modification bits, so that won't have to be done in the future as that would require invalidating shader storages (which are invalidated by this commit) again.
Put all descriptors used by translated shaders in up to 4 descriptor sets, which is the minimum required, and the most common on Android, `maxBoundDescriptorSets` device limit value
Transfers are functional on a D3D12-like level, but need additional work so fallbacks are used when multisampled integer sampled images are not supported, and to eliminate transfers between render targets within Vulkan format compatibility classes by using different views directly.
