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dawn / tint / 5c0457c78570fe914c02b8940d43a230572bc5ac
commit5c0457c78570fe914c02b8940d43a230572bc5ac[log] [tgz]
authorTint team <no-reply@google.com>Mon Aug 22 14:19:49 2022 +0000
committerTint LUCI CQ <tint-scoped@luci-project-accounts.iam.gserviceaccount.com>Mon Aug 22 14:19:49 2022 +0000
tree75df9241ef0bb0895f7c5141ed9aea1843e522f1
parent984c6cae83b40aee2f3a8ccc49a7f204499ef832 [diff]
Import Tint changes from Dawn

Changes:
  - 158c85dab456c06b5d99d4c509841ad697b399fd Add new relational rules to WGSL grammar. by dan sinclair <dsinclair@chromium.org>
  - 97e0c71eb6a3804e94936835faa5cf5ae91706dc Add new shift expression grammar rule. by dan sinclair <dsinclair@chromium.org>
  - 9d27ab70439e3c0fb971fc89865e984a2369a28c Update parser comments. by dan sinclair <dsinclair@chromium.org>
  - d0ccb1aae63ae89338a94e317436863c825cd130 tint/fuzzers: Add a fuzzer that tests concurrency by Ben Clayton <bclayton@google.com>
  - 2788becd0995b6a2cdea9c81f5f8e7192d40b4b7 Add `element_count_expression` to WGSL parser by dan sinclair <dsinclair@chromium.org>
  - 5d7de871b40058018df33b8d5513f66ea4cd7c2d tint/writer/msl: Remove TODO and old logic by Ben Clayton <bclayton@google.com>
  - 58794ae1189c675f4c7eb5d2021edb583c3f4f53 tint::ProgramBuilder: Simplify variable constructors by Ben Clayton <bclayton@google.com>
GitOrigin-RevId: 158c85dab456c06b5d99d4c509841ad697b399fd
Change-Id: I569ff387e005229c7ed542787f89753c93418abc
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/99860
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
131 files changed
tree: 75df9241ef0bb0895f7c5141ed9aea1843e522f1
  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.