| commit | 70f80bb13d80344974898646c8c1ae04a834aee5 | [log] [tgz] |
|---|---|---|
| author | James Price <jrprice@google.com> | Wed May 19 13:40:08 2021 +0000 |
| committer | Commit Bot service account <commit-bot@chromium.org> | Wed May 19 13:40:08 2021 +0000 |
| tree | f556f077554899ed36b9b51b7d40358195f19005 | |
| parent | 40ac15f157b707ff4b942f90324724275ac983c4 [diff] |
ast: Support non-literal workgroup_size parameters Change the type of the values in an ast::WorkgroupDecoration to be ast::Expression nodes, so that they can represent both ast::ScalarExpression (literal) and ast::IdentifierExpression (module-scope constant). The Resolver processes these nodes to produce a uint32_t for the default value on each dimension, and captures a reference to the module-scope constant if it is overridable (which will soon be used by the inspector and backends). The WGSL parser now uses `primary_expression` to parse arguments to workgroup_size. Also added some WorkgroupSize() helpers to ProgramBuilder. Bug: tint:713 Change-Id: I44b7b0021b925c84f25f65e26dc7da6b19ede508 Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/51262 Commit-Queue: James Price <jrprice@google.com> Auto-Submit: James Price <jrprice@google.com> Reviewed-by: Ben Clayton <bclayton@google.com>
Tint is a compiler for the WebGPU Shader Language (WGSL).
This is not an officially supported Google product.
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)Tint uses Chromium dependency management so you need to install depot_tools and add it to your PATH.
# 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
mkdir -p out/Debug cd out/Debug cmake -GNinja ../.. ninja # or autoninja
mkdir -p out/Debug cd out/Debug cmake ../.. make # -j N for N-way parallel build
mkdir -p out/Debug gn gen out/Debug autoninja -C out/Debug
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.
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
Please file any issues or feature requests at https://bugs.chromium.org/p/tint/issues/entry
Please see the CONTRIBUTING and CODE_OF_CONDUCT files on how to contribute to Tint.
Tint has a process for supporting experimental extensions.