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CMake-only fork of https://dawn.googlesource.com/dawn with cleaned, vendored dependencies
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Ben Clayton 2abecbba16 Always emit coverage, even if the exe returns non-zero 
Coverage can be useful for debugging unfamiliar code. If the bug causes a non-zero exit, then we still want the coverage to be generated.

Change-Id: I2d218cd4bb1395c71553e1baab78fb6ca9d41cca
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/35422
Auto-Submit: Ben Clayton <bclayton@google.com>
Commit-Queue: dan sinclair <dsinclair@chromium.org>
Reviewed-by: dan sinclair <dsinclair@chromium.org>
 		2020-12-12 16:19:54 +00:00
build_overrides Remove binutils from DEPS and pull in changes to build.gni from Dawn 2020-07-28 17:57:53 +00:00
docs [docs] Expand OpImageType documentation 2020-11-11 01:49:28 +00:00
fuzzers Remove internal usage of Context. 2020-12-02 21:17:58 +00:00
include/tint [transform] Add first index offset transform 2020-12-08 21:07:24 +00:00
infra/config Add tricium config. 2020-11-30 20:28:50 +00:00
samples [transform] Add first index offset transform 2020-12-08 21:07:24 +00:00
src ast: Remove no-arg constructor from Node 2020-12-12 13:00:34 +00:00
test [wgsl-reader] Add support for read only storage buffers. 2020-11-19 18:55:01 +00:00
third_party CMake: Add a flag to control whether to built tint_unittests 2020-12-09 14:47:30 +00:00
tools Always emit coverage, even if the exe returns non-zero 2020-12-12 16:19:54 +00:00
.clang-format Initial commit 2020-03-02 15:47:43 -05:00
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BUILD.gn Add a demangler 2020-12-11 18:29:03 +00:00
CMakeLists.txt CMake: Add a flag to control whether to built tint_unittests 2020-12-09 14:47:30 +00:00
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README.md

Tint

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 and CODE_OF_CONDUCT files on how to contribute to Tint.