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This is defensive. Without variable pointers capabilities, this is definitely invalid, but not yet checked by the SPIRV-Tools validator. Bug: tint:807 Change-Id: If9b0b19573b1ca14a1c55aa20c9d42784ec12568 Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/56700 Auto-Submit: David Neto <dneto@google.com> Kokoro: Kokoro <noreply+kokoro@google.com> Commit-Queue: David Neto <dneto@google.com> Reviewed-by: Ben Clayton <bclayton@google.com>
SPIR-V Reader
This component translates SPIR-V written for Vulkan into the Tint AST.
The SPIR-V reader entry point is tint::reader::spirv::Parser, which
implements the Reader interface in tint::reader::Reader.
It's usable from the Tint command line:
# Dump the Tint AST after reading SPIR-V.
tint --dump-ast --parse-only a.spv
# 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.
Feedback
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