Import Tint changes from Dawn

Changes:
  - aecf1a2ab5106c4a08f8e2ae79717483f3abf8ee tint/inspector: Fix GetOverrideDefaultValues() by Ben Clayton <bclayton@google.com>
  - 723da2aac5934a47fb85b3bae607eb52af9cee58 tint: split up const eval unit tests into multiple files by Antonio Maiorano <amaiorano@google.com>
  - c84d06e8603ce9c4b5c8d86e42e9ec0acf3bd689 tint/resolver: Improve errors for expr eval-stages by Ben Clayton <bclayton@google.com>
  - 559a2482339c2034ee85c6ba06bbd7ff70466c8c tint/resolver: Allow texture 'offset' to be const-expr by Ben Clayton <bclayton@google.com>
  - d5139b44631f52bbae71790fb237cd35bf1db83b [msl] Handle packed conversions in shift expressions. by dan sinclair <dsinclair@chromium.org>
  - 840e42477d9d8683ef1130dd51e0b71e23816f83 tint: update natvis by Antonio Maiorano <amaiorano@google.com>
  - f10a57908aeaccbe5f3348183752dc2519e40b39 tint: Use `const-expression` and `override-expression` te... by Ben Clayton <bclayton@google.com>
  - 92264f8bb26250ea201e454898ba4761e51fc410 tint/resolver: Fix NPE in CollectTextureSamplerPairs() by Ben Clayton <bclayton@google.com>
  - 4fe330fff4481164f4733a2d4431c890dbd6d5e9 tint: s/analysing/analyzing by Ben Clayton <bclayton@google.com>
  - 6988e894d2c033d1c0eaa9ddb78cb1746ccbb7ae spirv-reader: track access mode for ptr/ref by David Neto <dneto@google.com>
  - cc0c67bce8d8b782d3a83940a1e86d40a94d0d10 spirv-reader: Support GLSL.std.450 FindSMsb by David Neto <dneto@google.com>
  - 042711b2b1db99c9944199ba8f894fdc1ba344c2 Remove redundant file in tint/BUILD.gn by Corentin Wallez <cwallez@chromium.org>
  - ba384f0383502bb182f810c3007235a6d0aadc3f tint/transform: Fix array materialization when indexing w... by Ben Clayton <bclayton@google.com>
  - d6daefc3798532cdd31cbcc9d006e41dc0ca43ce wgsl: Print abstract-floats with full precision. by Ben Clayton <bclayton@google.com>
  - 2b8c9d7c2a1ce0463db6feef8fc57c3c866336cb spirv-reader: Support GLSL.std.450 FindUMsb by David Neto <dneto@google.com>
  - d2e0db3af2c61efa01254d895d4f335b50d80e6e tint: Rename kInvalid to kUndefined for enums by Ben Clayton <bclayton@google.com>
  - 78c839be976a332cd651bbfc651768d426ecfea0 tint/resolver: Ensure that total workgroup size fits in u32 by Ben Clayton <bclayton@google.com>
GitOrigin-RevId: aecf1a2ab5106c4a08f8e2ae79717483f3abf8ee
Change-Id: I6865b5a6e90a527fe223fa4623a897f2cc2a3c90
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/105700
Reviewed-by: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Commit-Queue: Copybara Prod <copybara-worker-blackhole@google.com>
94 files changed
tree: 90212e71a89c19d73a913d3ae4409c914bda7313
  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
  13. AUTHORS
  14. BUILD.gn
  15. CMakeLists.txt
  16. CMakeSettings.json
  17. CODE_OF_CONDUCT.md
  18. CPPLINT.cfg
  19. DEPS
  20. Doxyfile
  21. LICENSE
  22. OWNERS
  23. PRESUBMIT.py
  24. README.md
  25. standalone.gclient
  26. tint_overrides_with_defaults.gni
README.md

Tint


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.

Requirements

  • 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)

Building

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 https://dawn.googlesource.com/tint 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/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/11.0.0/lib/darwin/libclang_rt.fuzzer_osx.a

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

Issues

Please file any issues or feature requests at https://bugs.chromium.org/p/tint/issues/entry

Contributing

Please see the contributing guide in the Dawn repo.