microsoft/spirv_to_dxil: Lower loads/stores to DXIL

This adjusts UBO loads to be float4 loads, and handles SSBO accesses
that are larger/smaller than 32bit.

Reviewed-by: Enrico Galli <enrico.galli@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10149>

src/microsoft/spirv_to_dxil/spirv_to_dxil.c

@@ -110,6 +110,7 @@ spirv_to_dxil(const uint32_t *words, size_t word_count,
 
    NIR_PASS_V(nir, dxil_nir_split_clip_cull_distance);
    NIR_PASS_V(nir, nir_lower_samplers);
+   NIR_PASS_V(nir, dxil_nir_lower_loads_stores_to_dxil);
 
    struct nir_to_dxil_options opts = {.vulkan_environment = true};