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CMake-only fork of https://dawn.googlesource.com/dawn with cleaned, vendored dependencies
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Antonio Maiorano 05743afb56 Revert "Add DuplicateStorageStruct transform" 
This reverts commit 594075a2f0.

Reason for revert: This is not a complete solution. It does not cover assignment of variables of the same struct type, but of different access types. For example:

```
[[block]] struct S{ i : 32; };
var<storage> gr : [[access(read)]] S;
var<storage> gw : [[access(write)]] S;
fn f() {
  var a : S;
  a = gr;
  gw = a;
}
```

With my CL, we currently generate invalid assignments because the new types of 'S' for 'gr' and 'gw' are now all different types. We would need to generate functions to assign between them.

In the end, we will drop this strategy, and instead, Dawn will be modified to not rely on names.

Original change's description:
> Add DuplicateStorageStruct transform
>
> This transform is currently required by Dawn for it's GLSL backend so
> that SPIRV-Cross does not end up renaming the structures internally,
> which it does to fix aliasing problems. We can remove this transform
> if/once Dawn using binding numbers rather than names for uniform/storage
> buffer data.
>
> Bug: tint:386
> Bug: tint:808
>
> CloneContext: allow insert before/after of a node marked for removal
> Change-Id: I3ff3b37bca62db07d5c759250dd4777e279b7a4f
> Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/51403
> Commit-Queue: Ben Clayton <bclayton@google.com>
> Kokoro: Kokoro <noreply+kokoro@google.com>
> Reviewed-by: Ben Clayton <bclayton@google.com>

TBR=bclayton@google.com,amaiorano@google.com,noreply+kokoro@google.com

Change-Id: I695347b0ffe8be23b9dc44885af378be56512406
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: tint:386
Bug: tint:808
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/51500
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Commit-Queue: Antonio Maiorano <amaiorano@google.com>
 		2021-05-19 12:22:59 +00:00
.vscode .vscode/tasks.json: Make build & configure work for windows. 2021-03-30 20:10:08 +00:00
build_overrides Remove obsolete GN config 2021-01-18 15:25:23 +00:00
docs Add translation scheme for HLSL-style input/outputs 2021-05-14 04:26:23 +00:00
fuzzers Remove fuzzing for transform::EmitVertPointSize 2021-05-07 15:48:04 +00:00
include/tint Remove legacy EmitVertexPointSize transform 2021-05-11 13:16:10 +00:00
infra/config remove tricium config 2021-04-19 14:59:09 +00:00
kokoro Kokoro: Check lint and doxygen 2021-05-12 08:15:41 +00:00
samples Add texture_external to inspector 2021-05-17 17:40:17 +00:00
src Revert "Add DuplicateStorageStruct transform" 2021-05-19 12:22:59 +00:00
test Revert "Add DuplicateStorageStruct transform" 2021-05-19 12:22:59 +00:00
third_party Fix VS clang-cl build 2021-03-09 21:51:50 +00:00
tools tools/test-all.sh: Reimplement in golang 2021-05-14 19:48:43 +00:00
.clang-format Initial commit 2020-03-02 15:47:43 -05:00
.gitignore gitignore /build*/ folders 2021-05-18 14:42:47 +00:00
.gn Get `gn gen --check` actually working in repo 2021-04-21 19:05:14 +00:00
AUTHORS Add AUTHORS file 2021-03-17 17:54:33 +00:00
BUILD.gn BUILD.gn: Remove the temporary group with Dawn migrated. 2021-03-17 07:41:03 +00:00
CMakeLists.txt Kokoro: Check lint and doxygen 2021-05-12 08:15:41 +00:00
CMakeSettings.json Add CMakeSettings.json with convenient defaults 2021-03-16 18:52:53 +00:00
CODE_OF_CONDUCT.md Initial commit 2020-03-02 15:47:43 -05:00
CONTRIBUTING.md Add a style guide 2021-04-08 15:10:47 +00:00
CPPLINT.cfg Adding PRESUBMIT.py with a bunch of checks turned on 2020-06-03 13:41:41 +00:00
DEPS Update SPIRV-Tools, SPIRV-Headers 2021-05-13 14:03:12 +00:00
Doxyfile Kokoro: Check lint and doxygen 2021-05-12 08:15:41 +00:00
LICENSE Initial commit 2020-03-02 15:47:43 -05:00
OWNERS Add an OWNERS file 2021-03-08 16:07:55 +00:00
PRESUBMIT.py Add language check 2020-11-16 15:01:27 +00:00
README.md Proposed process for experimental extensions 2021-04-27 17:55:07 +00:00
standalone.gclient Convert dependency management to using gclient 2020-03-05 15:58:27 +00:00
tint_overrides_with_defaults.gni Change the default for BUILD.gn to build all the modules 2020-07-30 18:44:04 +00:00

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.

Tint has a process for supporting experimental extensions.