Import Tint changes from Dawn

  - 060137a712fccb7871a9a2662b05bd3dc7d314c4 Replace NULL with nullptr by Jiawei Shao <>
  - 751e6686aa7c4deed479bea84f4a8edf3a2bb8c8 tint/intrinsics.def: Implement saturate() by Ben Clayton <>
  - f3d9ea4beaf1f2746c5ede59c747829a9d38eb94 tint: Error if statically indexing out of bounds. by Ben Clayton <>
  - 05d8b02b0f49d46054105f21e388633562c201f7 GLSL: implement host-visible memory padding. by Stephen White <>
  - e667d777ac7576f073238c48553186b9b4c19132 tint/fuzzers/tint_concurrency_fuzzer: Reduce number of th... by Ben Clayton <>
  - 0dfbaa9ef98dbc221e2abcf27cde2b5644031b25 tint: Make ForEachElemPair return value an enum instead o... by Antonio Maiorano <>
  - e53b6f95025c28af68e7f970dd9b6a28b32532a8 tint: const eval of binary bitwise AND and OR by Antonio Maiorano <>
  - 5b3707a2d7419ed12459847c6a683f3a8c811102 tint: Implement const eval of unary not by Antonio Maiorano <>
  - 8175cff07b785c206766c7f0499c617b515e93a9 tint/const_eval_test: factor out testing framework from b... by Antonio Maiorano <>
GitOrigin-RevId: 060137a712fccb7871a9a2662b05bd3dc7d314c4
Change-Id: Ic888c9b652ad39484191e0d3d8d07876b4a7f0e1
Kokoro: Kokoro <>
Commit-Queue: Ben Clayton <>
Reviewed-by: Ben Clayton <>
30 files changed
tree: 27d88b57e6415afd347460d6cee07d2926d35246
  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.