[spirv] [tracking] SPIR-V dialect

[antiagainst]

(NOTE: This is not updated anymore. Please see https://mlir.llvm.org/docs/Dialects/SPIR-V/ for supported features.)

This is a tracking bug for completing the SPIR-V dialect. It will be periodically updated to provide the current status. Anybody interested in helping is very welcome to pick up tasks here! :)

Core infrastructure

• [x] Dialect skeleton (scaffolding, registration, etc.)
• [x] Serialization & deserialization skeleton
• [x] Script to query SPIR-V HLSL and JSON spec to auto-generate SPIR-V dialect op definitions
• [x] TableGen backend to auto-generate SPIR-V (de)serialization logic
• [ ] Version/extension/capability support
• [ ] Extension library organization

For Vulkan compute

• [x] Module structure
• Types
  • [ ] Scalar types
    • [x] void, bool, Int, float
    • [ ] Integer signedness
  • [x] Vector
  • [x] (Runtime) Array
  • [x] Struct
• Operations
  • [x] Constants
  • [ ] Spec constants
    • [x] Scalar spec constants
    • [ ] Composite spec constants
  • [x] Variables
  • [x] Arithmetic ops
  • [x] Bit ops (#173)
  • [x] Logical ops
  • [x] Barrier ops
  • [x] Conversion ops (#174)
  • [ ] Composite ops
  • [ ] Atomic ops
  • [x] GLSL ops
• Control flow
  • [x] Structured selection
  • [x] Structured loop
  • [x] Phi
  • [ ] Switch

For Vulkan graphics

[TODO]

For OpenCL

[TODO]