commit	c1bf5bc554bc09421041d5a6873589ad178dffe0	[log] [tgz]
author	Tint team <no-reply@google.com>	Mon Jun 05 09:42:32 2023 +0000
committer	Tint LUCI CQ <tint-scoped@luci-project-accounts.iam.gserviceaccount.com>	Mon Jun 05 09:42:32 2023 +0000
tree	fd2778b3cb60cf39ba039a5b5130f94f79fe8a25
parent	2644b3dbda9043a38a8a568f929eac9324a349d4 [diff]

Import Tint changes from Dawn

Changes:
  - 5ccafa4dece04658608a39c5eaeddd83d00fc75d [ir] Add a validator by dan sinclair <dsinclair@chromium.org>
  - 68bfd6db9d27dd28104026c4130d6e7ab832bd4c [tint] Add assertions for iterator invalidation by James Price <jrprice@google.com>
  - 5682a629756e1efe36a1179505cc9877e6abcc6a [ir][spirv-writer] Implement constant arrays by James Price <jrprice@google.com>
  - 41d7513507a99e17ff82acdb11ab85014eea96d9 [ir][spirv-writer] Add type manager alias in tests by James Price <jrprice@google.com>
  - 319dd5c4a66b93af0845eed119a8437778b79b98 [ir] Rename Instruction::Replace to ReplaceWith by James Price <jrprice@google.com>
  - 0b454a372c9acc37c36414fea2b21577a4ec78c1 [ir] Fix type for accessor on LHS of assignment by James Price <jrprice@google.com>
  - ef390b9d12369093d0b8cf8d75d381b824804dbc [ir] Cleanup ir test helper. by dan sinclair <dsinclair@chromium.org>
  - f4a3d2220d9422c8cb6bfbd1e1edc8021de6f4d5 [ir] Fix access disassembly. by dan sinclair <dsinclair@chromium.org>
  - 9c2369afe0b478746070fb835cc7bd50467257e0 [ir] Add multi-element swizzle. by dan sinclair <dsinclair@chromium.org>
  - b8f7ad179867715d25421f6629a4a435552af141 [tint][reader][wgsl]: Improve diagnostics for template er... by Ben Clayton <bclayton@google.com>
  - 8037f42c0756cf137702a90a31d685de0a522716 [ir] Fix let accessor tests by dan sinclair <dsinclair@chromium.org>
  - d39a400f98d782c176381d1bdf505092ddd4fc16 [tint][reader][wgsl]: Remove source from Expect by Ben Clayton <bclayton@google.com>
  - fb4d0ae372378bdde98288be43edd450a9fcdd8c [ir] Add accessors by dan sinclair <dsinclair@chromium.org>
  - 0f8b7043dda6d7b3d7258c39e0de1a8114155355 [tint][reader][wgsl]: Unify expression list parsing. by Ben Clayton <bclayton@google.com>
GitOrigin-RevId: 5ccafa4dece04658608a39c5eaeddd83d00fc75d
Change-Id: Id20cebb88c89d159f09bca11255937f9ee4ff59a
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/135860
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>

62 files changed

tree: fd2778b3cb60cf39ba039a5b5130f94f79fe8a25

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.