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dawn / tint / 50904d5e2a5e288f99482717d21717daebae1fda
commit50904d5e2a5e288f99482717d21717daebae1fda[log] [tgz]
authorTint team <no-reply@google.com>Wed Dec 14 10:21:54 2022 +0000
committerTint LUCI CQ <tint-scoped@luci-project-accounts.iam.gserviceaccount.com>Wed Dec 14 10:21:54 2022 +0000
treea73fed66016a154036def340136be87caed3d9b1
parentb5f70004da9e539d2b637fb7f3ca064ff64bb328 [diff]
Import Tint changes from Dawn

Changes:
  - fbb339ff97405b49762883d5e3155f83527ef417 tint: Add sem::Load node by Ben Clayton <bclayton@google.com>
  - bed9c98a07fd83802d04cff5bdb11b66835401a6 tint: const eval of fract by Antonio Maiorano <amaiorano@google.com>
  - 60eac7250428232c5020001b6f578370b58826be Move constants into a Castable hierarchy. by dan sinclair <dsinclair@chromium.org>
  - 1c953fa86362195082fd96341037666ea2cb0905 tint: fix build by Antonio Maiorano <amaiorano@google.com>
  - 51d88ebf30dd8b40010c3553c79cfb7c270a9ec5 tint/utils: Reduce cost of HashCombine by Ben Clayton <bclayton@google.com>
  - be9696777842d0de4d6639a9214774331b17c287 tint: const eval of pow builtin by Antonio Maiorano <amaiorano@google.com>
  - 7f5b9d0b6f0d5f43fa89b961ebfa9c379bdd4e8e tint: add CheckedPow by Antonio Maiorano <amaiorano@google.com>
  - e3f3de773a19824f381c0c462f0de7864f76a704 tint/resolver: Fix const-eval Equal() by Ben Clayton <bclayton@google.com>
  - f2b86aaffbaef0563a89e1f187e3e5bbef4c2d25 tint: Add hash randomization by Ben Clayton <bclayton@google.com>
  - 10182c46d95ea0ba2de20e39e3f1ee177da2f185 Move sem::Constant to constant::Constant by dan sinclair <dsinclair@chromium.org>
GitOrigin-RevId: fbb339ff97405b49762883d5e3155f83527ef417
Change-Id: I992b659ca76dee32ef4c2b68fa0ab599b81d88e5
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/114281
Commit-Queue: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
63 files changed
tree: a73fed66016a154036def340136be87caed3d9b1
  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.