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dawn / tint / 7addb10805f98200bcf83a68814b6b6b5ad10986
commit7addb10805f98200bcf83a68814b6b6b5ad10986[log] [tgz]
authorTint team <no-reply@google.com>Sun Jul 24 17:41:06 2022 +0000
committerTint LUCI CQ <tint-scoped@luci-project-accounts.iam.gserviceaccount.com>Sun Jul 24 17:41:06 2022 +0000
tree1bc3c5bd8caef32ff4463e43468e21a3595be3ff
parent1aff6895b690cc54e383d7f4295d44bbc39d5f86 [diff]
Import Tint changes from Dawn

Changes:
  - 7d34de88f1752c1119f33a444b5383c8510e78e5 tint/test-runner: Split expectations for FXC and DXC by Ben Clayton <bclayton@google.com>
  - a089376daf17ed16c2b527d26aa41338c1ad60f8 Context aware address space parsing. by dan sinclair <dsinclair@chromium.org>
  - 87254ff58e954cf6daa9f8f851d4fa5604cadf60 Update error messages to say initializer by dan sinclair <dsinclair@chromium.org>
  - 05288f6cff05391449877104b338a15ae0bbe81f Rename paren_rhs_stmt to paren_expression. by dan sinclair <dsinclair@chromium.org>
  - 256f1116b836aa88d8704e7f4ee2f6b32ed44dff Add transform to substitute overrides with const expressi... by dan sinclair <dsinclair@chromium.org>
GitOrigin-RevId: 7d34de88f1752c1119f33a444b5383c8510e78e5
Change-Id: I8b57174088889a4de2ceea5033b3b74e1a91fa1a
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/96984
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
26 files changed
tree: 1bc3c5bd8caef32ff4463e43468e21a3595be3ff
  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.