Import Tint changes from Dawn

  - c11e2ed2572c4ea87355112d48a990c10951df07 Make OFI transform push_constant-friendly. by Stephen White <>
  - 522d475b6e03e22bb68e2eeb472292aeffa53293 Update message when indexing a scalar. by dan sinclair <>
  - b1a05445b2382b94484fc47b36610077cf1e3306 [tint] Add vector overloads of subgroupBroadcast by James Price <>
  - bdc7e32ee461c1636cad7c01eae60690cbe6b6f9 Add deprecated proxy methods. by dan sinclair <>
  - 12e659c1781fc666e92b09acc52e36f92ab61f8a [tint] Fix build by Ben Clayton <>
  - 26a41b967eb39c6ad9c8685e12941c910d5fc62c dawn: use binding information for HLSL interface by Antonio Maiorano <>
  - 76aec2564a48cf67f669164e57d8def61c1b608c [tint] Reduce all hash codes to 32 bits by Ben Clayton <>
  - 4effffbfb5b41283b03dc3121521fbf272448898 [tint] Replace HashCode with TypeCode and TypeCodeSet by Ben Clayton <>
  - 9dc42add8fdeb00c36aaaa3ed2d19d4bdfbc6ab6 [tint][ast] Fix type <-> parameter shadowing issues. by Ben Clayton <>
  - ec817fd5805b7a4d8c2f529119b74355838e4e00 [tint] Move 'pointer_composite_access' to kShippedWithKil... by Ben Clayton <>
  - 1e1f488f3ea12a8be5795ba9cad2bacb275accb6 [tint][utils] PascalCase tint::diag functions by Ben Clayton <>
  - 1c5c26632a3aa4496fc14d2c4000789cf0974cb5 GLSL: move the AddBlockAttribute transform before OffsetF... by Stephen White <>
  - 2817c2b745ffb971bee36bc006a37dfce07c64b1 [tint][fuzz] Fix signature of LLVMFuzzerInitialize() by Ben Clayton <>
  - 2555f180bf0d7180fe8767782b5e0f6ba3204fc9 [tint] Add TINT_ASSERT_ALL_FIELDS_REFLECTED() macro by Ben Clayton <>
GitOrigin-RevId: c11e2ed2572c4ea87355112d48a990c10951df07
Change-Id: Id1073dceaa6de6d536014c50cae3af0e1d205089
Kokoro: Kokoro <>
Reviewed-by: Ben Clayton <>
Commit-Queue: Ben Clayton <>
228 files changed
tree: 607397baadd6007e55a2d25065ad166bab4e8be7
  1. .vscode/
  2. build_overrides/
  3. docs/
  4. include/
  5. infra/
  6. kokoro/
  7. scripts/
  8. src/
  9. third_party/
  10. tools/
  11. .clang-format
  12. .gitignore
  13. .gn
  16. CMakeLists.txt
  17. CMakeSettings.json
  19. CPPLINT.cfg
  20. DEPS
  22. OWNERS
  25. standalone.gclient


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.