SPIR-V Reader

This component translates SPIR-V written for Vulkan into the Tint AST.

The SPIR-V reader entry point is tint::spirv::reader::Parser, which implements the Reader interface in tint::reader::Reader.

It's usable from the Tint command line:

# Translate SPIR-V into WGSL.
tint --format wgsl a.spv

Supported dialects

The SPIR-V module must pass validation for the Vulkan 1.1 environment in SPIRV-Tools. In particular, SPIR-V 1.4 and later are not supported.

For example, the equivalent of the following must pass:

spirv-val --target-env vulkan1.1 a.spv

Additionally, the reader imposes additional constraints based on:

The features supported by WGSL. Some Vulkan features might not be supportable because WebGPU must be portable to other graphics APIs.
Limitations of the reader itself. These might be relaxed in the future with extra engineering work.

Please file issues at https://crbug.com/tint, and apply label SpirvReader.

Outstanding issues can be found by using the SpirvReader label in the Chromium project's bug tracker: https://bugs.chromium.org/p/tint/issues/list?q=label:SpirvReader