[PATCH] D72760: [mlir][spirv] Add implied capabilities and availability for capabilities

[Lei Zhang via Phabricator via llvm-commits]

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Certain SPIR-V capabilities are only available in certain SPIR-V versions
or extensions. Also a SPIR-V capability may implicitly declares other
capabilities.

This commit updates gen_spirv_dialect.py to support generating such
information into SPIRVBase.td. It requires us to topologically sort
all capabilities because now a capability can refer to another one.

This commits also registers a few extensions because their symbols are
used by capability availability.

Note that this commit hasn't updated SPIRVConversionTarget to take
into consideration such relationship yet. That will be done in a
following-up commit.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D72760

Files:
  mlir/include/mlir/Dialect/SPIRV/SPIRVBase.td
  mlir/utils/spirv/gen_spirv_dialect.py

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