Jason Ekstrand
eb4b1477dc
This adds a second level of caching for the pre-lowered NIR that's only based off of the shader module, entrypoint and specialization constants. This is enough for spirv_to_nir as well as our first round of lowering and optimization. Caching at this level should allow for faster shader recompiles due to state changes. The NIR caching does not get serialized to disk via either the VkPipelineCache serialization mechanism or the transparent on-disk cache. We could but it's usually not that expensive to fall back to SPIR-V for the odd cache miss especially if it only happens once for several misses and it simplifies the cache. Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
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