Import Tint changes from Dawn

  - d060f36a1cb56df491820b10bdeb6a3258e7a73c tint: refactor Number<T> constants for highest, lowest, e... by Antonio Maiorano <>
  - 00cc485addeabbda12ff2bcc0d3fd52c08177fad Regex fuzzer: add swizzles by Alastair F. Donaldson <>
  - 3ca6880cafc49060b65c8768712e41c200102045 tint/sem: Add conversion handling of array types by Ben Clayton <>
  - 6fb5d379c2fd5f7415e793056b22d09a9626870a tint/sem: Add const to StructMember 'type'. by Ben Clayton <>
  - 8e0368e554917c4ee6913dc3d86e05aefa092716 tint: Use utils::Vector for sem::Type::Common() by Ben Clayton <>
  - 05a76183e0c071827a14301108c885752f451a04 tint: Split Resolver::Materialize() by Ben Clayton <>
  - ea84b9b07252c5e65abb459403bae123e477c594 tint/sem: Treat abstract-numerics as scalars. by Ben Clayton <>
  - 6fe1f515d4b4411fb44bb656ab804b833d16526a tint: Add f16 support for parts of float built-in, part 1 by Zhaoming Jiang <>
  - 65dcdcbad08f7cd32ae0925cec42be269ada4a81 tint/resolver: Clean up the SPIRV builder built-in unitte... by Zhaoming Jiang <>
GitOrigin-RevId: d060f36a1cb56df491820b10bdeb6a3258e7a73c
Change-Id: I1b4c7cee3fe182eda2b358b88cd46dcee64eb519
Commit-Queue: Ben Clayton <>
Kokoro: Kokoro <>
Reviewed-by: Ben Clayton <>
29 files changed
tree: c7f59378118d002b548fa69db3d4f752ee4e586b
  1. .vscode/
  2. build_overrides/
  3. docs/
  4. include/
  5. infra/
  6. kokoro/
  7. src/
  8. third_party/
  9. tools/
  10. .clang-format
  11. .gitignore
  12. .gn
  15. CMakeLists.txt
  16. CMakeSettings.json
  18. CPPLINT.cfg
  19. DEPS
  20. Doxyfile
  22. OWNERS
  25. standalone.gclient
  26. tint_overrides_with_defaults.gni


Note: This repo is read-only, minimized mirror of the Dawn repo.

Tint changes should be made in the Dawn repo.

Tint is a compiler for the WebGPU Shader Language (WGSL).

This is not an officially supported Google product.


  • Git
  • CMake (3.10.2 or later)
  • Ninja (or other build tool)
  • Python, for fetching dependencies
  • depot_tools in your path

Build options

  • TINT_BUILD_SPV_READER : enable the SPIR-V input reader (off by default)
  • TINT_BUILD_WGSL_READER : enable the WGSL input reader (on by default)
  • TINT_BUILD_SPV_WRITER : enable the SPIR-V output writer (on by default)
  • TINT_BUILD_WGSL_WRITER : enable the WGSL output writer (on by default)
  • TINT_BUILD_FUZZERS : enable building fuzzzers (off by default)


Tint uses Chromium dependency management so you need to install depot_tools and add it to your PATH.

Getting source & dependencies

# Clone the repo as "tint"
git clone tint
cd tint

# Bootstrap the gclient configuration
cp standalone.gclient .gclient

# Fetch external dependencies and toolchains with gclient
gclient sync

Compiling using CMake + Ninja

mkdir -p out/Debug
cd out/Debug
cmake -GNinja ../..
ninja # or autoninja

Compiling using CMake + make

mkdir -p out/Debug
cd out/Debug
cmake ../..
make # -j N for N-way parallel build

Compiling using gn + ninja

mkdir -p out/Debug
gn gen out/Debug
autoninja -C out/Debug

Fuzzers on MacOS

If you are attempting fuzz, using TINT_BUILD_FUZZERS=ON, the version of llvm in the XCode SDK does not have the needed libfuzzer functionality included.

The build error that you will see from using the XCode SDK will look something like this:

ld: file not found:/Applications/

The solution to this problem is to use a full version llvm, like what you would get via homebrew, brew install llvm, and use something like CC=<path to full clang> cmake .. to setup a build using that toolchain.

Checking [chromium-style] issues in CMake builds

The gn based work flow uses the Chromium toolchain for building in anticipation of integration of Tint into Chromium based projects. This toolchain has additional plugins for checking for style issues, which are marked with [chromium-style] in log messages. This means that this toolchain is more strict then the default clang toolchain.

In the future we will have a CQ that will build this work flow and flag issues automatically. Until that is in place, to avoid causing breakages you can run the [chromium-style] checks using the CMake based work flows. This requires setting CC to the version of clang checked out by gclient sync and setting the TINT_CHECK_CHROMIUM_STYLE to ON.

mkdir -p out/style
cd out/style
cmake ../..
CC=../../third_party/llvm-build/Release+Asserts/bin/clang cmake -DTINT_CHECK_CHROMIUM_STYLE=ON ../../ # add -GNinja for ninja builds


Please file any issues or feature requests at


Please see the contributing guide in the Dawn repo.