commit	b332733360245e2f931c633c8b0f378985deae40	[log] [tgz]
author	Tint team <no-reply@google.com>	Mon Apr 29 13:51:35 2024 +0000
committer	Tint LUCI CQ <tint-scoped@luci-project-accounts.iam.gserviceaccount.com>	Mon Apr 29 13:51:35 2024 +0000
tree	c994494b6bf30824b0a11120eb18873b0ed653f0
parent	3a2d563c6829dd51cd09fae5e40050bb016a1e5a [diff]

Import Tint changes from Dawn

Changes:
  - 9f8fc29c18dc783f5652f51abbd84e032d26c184 [tint][fuzz][ast] Add Renamer fuzzer by Ben Clayton <bclayton@google.com>
  - 27182a6a388998ee89780d47aeba752c06a3e964 [tint][fuzz][ast] Add VertexPulling fuzzer by Ben Clayton <bclayton@google.com>
  - 63433b96c2cfb869dffa499526e6334f3c66b3ab [tint][fuzz][ast] Add SingleEntryPoint fuzzer by Ben Clayton <bclayton@google.com>
  - f413875fd1a6f998a26b78ac20089c0ee3ee542b [tint][fuzz][ast] Add VectorizeScalarMatrixInitializers f... by Ben Clayton <bclayton@google.com>
  - d484de5f2b9ad370252fe961caa005f2d551128b [tint][fuzz][ast] Add Unshadow fuzzer by Ben Clayton <bclayton@google.com>
  - 863163d7c083bdb2b6005b99328da543fb6d98c2 [tint][fuzz][ast] Add Std140 fuzzer by Ben Clayton <bclayton@google.com>
  - 04d18e8749e2822e6886ff7c5057a45523d39183 [tint][fuzz][ast] Add RemoveUnreachableStatements fuzzer by Ben Clayton <bclayton@google.com>
  - 91bcb31e731e4c4fc6cf6fd23a5f120c688cc643 [tint][fuzz][ast] Add RemovePhonies fuzzer by Ben Clayton <bclayton@google.com>
  - f9712da0c62a8e8dfa824ecca20215b0316b57fa [tint][fuzz][ast] Add RemoveContinueInSwitch fuzzer by Ben Clayton <bclayton@google.com>
  - 3ede0c5bbce449eac3facc375e4e12b5246b68e4 [tint][fuzz][ast] Add PromoteSideEffectsToDecl fuzzer by Ben Clayton <bclayton@google.com>
  - 4cd472b4926ffab21197032c5eaca0f196d4b574 [tint][ast] Fix PromoteInitializersToLet for short-circui... by Ben Clayton <bclayton@google.com>
  - 08b3dd96132c74161448cb82b7d59e254c4c4f07 [tint][fuzz][ast] Add (disabled) PromoteInitializersToLet... by Ben Clayton <bclayton@google.com>
  - 73244e2d11ccd8be4cb9bd5e16e2b40ea5344353 [tint][fuzz][ast] Add PreservePadding fuzzer by Ben Clayton <bclayton@google.com>
  - 5ed1dccb79adac8db9440ea8bc802c0fd26e0c0f [tint][fuzz][ast] Add OffsetFirstIndex fuzzer by Ben Clayton <bclayton@google.com>
GitOrigin-RevId: 9f8fc29c18dc783f5652f51abbd84e032d26c184
Change-Id: Ia3241a06c926c298671828ff0a8f90586c10eb31
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/186101
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: dan sinclair <dsinclair@google.com>
Commit-Queue: dan sinclair <dsinclair@google.com>

26 files changed

tree: c994494b6bf30824b0a11120eb18873b0ed653f0

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.