This is a modified version of the HLSL writer.
Basic types, arrays, entry points, reserved keywords, uniforms,
builtin uniforms, structs, some builtin functions, zero initialization
are implemented. Textures, SSBOs and storage textures in particular are
unimplemented. All the unit tests "pass", but the output is not correct
in many cases.
triangle.wgsl outputs correct vertex and fragment shaders that pass
GLSL validation via glslang. compute_boids.wgsl outputs a valid but not
correct compute shader.
Change-Id: I96c7aaf60cf2d4237e45d732e5f51b345aea0552
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/57780
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Stephen White <senorblanco@chromium.org>
Reviewed-by: Ben Clayton <bclayton@google.com>
- Locally tested with each of the 6 options turned off alone, and fixed
the build.
- Added an incremental build to the Linux Kokoro build with all these
flags disabled, which will help catch a subset of build issues related
to these flags.
Bug: tint:1139
Change-Id: I40eaaea31d88879aa19eac3f17c47b7e7d7a477f
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/63241
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: Antonio Maiorano <amaiorano@google.com>
Change-Id: Ib084dd47a7ad37a64d8abe9cc577f6b05b91a913
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/63340
Auto-Submit: Alastair Donaldson <afdx@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Remap all resources into a flat namespace, to allow tests to pass when
multiple resources use the same binding number.
Fixed: tint:959
Change-Id: I58ed07c789e1ea90fc370ceba73b9d8292902549
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/61261
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: James Price <jrprice@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
We're about to go into a Chrome Origin Trial, and crbug.com/tint is not the correct place to file Chrome related bugs.
Move this message to the tint executable, which is code not used by chrome.
Change-Id: Ib33630164fa5d7bec3c581e5eca6ff188921eef8
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/60562
Auto-Submit: Ben Clayton <bclayton@google.com>
Reviewed-by: James Price <jrprice@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Kokoro: Ben Clayton <bclayton@google.com>
Implemented for all readers and writers.
Cleaned up some verbose code in sem::Function and the Inspector in the
process.
Fixed: tint:1032
Change-Id: Ia6f2f59e6d2e511c89160b97be990e8b7c9828d9
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/59664
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: David Neto <dneto@google.com>
Reviewed-by: James Price <jrprice@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Auto-Submit: Ben Clayton <bclayton@google.com>
Before and after each transform of a transform::Manager.
This change makes the transforms use the Castable system so we can get the transform name.
Change-Id: I2cf9335960f1aca56f1d32c5ba0d104db4cc46c1
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/54581
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: James Price <jrprice@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Adds a new single-function API for the generators, which applies the
sanitizing transform and performs the generation in one step, and
returns a result object which contains the generated code and success
status/diagnostics.
The new APIs take an `Option` structure to control backend-specific
generation details (e.g. MSL fixed sample mask). The result objects
also provide backend-specific feedback (e.g. whether a UBO of buffer
lengths was generated).
HLSL needs a list of entry points to validate, and it's the HLSL
sanitizer that generates an entry point for programs that do not have
one. This change makes the HLSL generator return the list of
post-sanitize entry points so that the Tint executable can forward
them to the validation code.
Change-Id: I2d5aa27fda95d7c50c5bef41e206aee38f2fd2eb
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/57101
Auto-Submit: James Price <jrprice@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: James Price <jrprice@google.com>
Reviewed-by: Ben Clayton <bclayton@chromium.org>
WGSL:
* Remove vertex_idx and instance_idx.
These are now vertex_index and instance_index.
It seems this was removed once before, then reverted due to CTS
failures, but the original change never landed again.
* Remove the [[set(n)]] decoration. This has been [[group(n)]] for
months now.
API:
* Remove deprecated enums from transform::VertexFormat.
* Remove transform::Renamer constructor that takes a Config. This should
be passed by DataMap.
* Remove ast::AccessControl alias to ast::Access.
Change-Id: I988c96c4269b02a5d77163409f261fd5923188e0
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/56541
Commit-Queue: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: James Price <jrprice@google.com>
This transform is intended to clean up the output of the SPIR-V reader, so that we can pattern match loops that can be transformed into a for-loop.
Bug: tint:952
Change-Id: Iba58e4e1f6e20daaf7715e493df53346cdb7c89f
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/56766
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: David Neto <dneto@google.com>
Commit-Queue: David Neto <dneto@google.com>
Auto-Submit: Ben Clayton <bclayton@google.com>
We will want this transform to do more bounds and argument sanitization.
Bug: tint:748
Change-Id: I38cb9623622e9f5ab85d8cd420d669ca6be77099
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/56543
Auto-Submit: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Antonio Maiorano <amaiorano@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Roughly 4x faster than validating with the MSL executable.
Change-Id: I6566fa29622475c459eb3a988a842a9e19d4be6f
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/53680
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Performs output validation with spirv-val for SPIR-V (as before), HLSL
validation with DXC, and MSL validation with the Metal Shader Compiler.
Disable HLSL tests that fail to validate
Bug: tint:812
Change-Id: If78c351b4e23c7fb50d333eacf9ee7cc81d18564
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/51280
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Antonio Maiorano <amaiorano@google.com>
PrintWGSL() was using the moved program, triggering an ICE
Change-Id: I8976feac8712cc883d1b1b4bdca35a929bcb846a
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/53040
Reviewed-by: James Price <jrprice@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
A diagnostic is not very helpful without the surrounding code.
This is especially useful when debugging issues with the SPIR-V reader and post-transform.
Change-Id: Idfeeaebf0cf0be98093838f8c8ad8bca4866b5b0
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/51922
Commit-Queue: Ben Clayton <bclayton@chromium.org>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Adds texture_external to the inspector, allowing us to recognize the
type and return provide binding information. Includes a basic test.
Bug: Dawn:728
Change-Id: Ib0f39998359dc22a530ad222141229f9ba30552f
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/51161
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
Commit-Queue: Brandon Jones <brandon1.jones@intel.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
This has been moved into the Spirv sanitizer, and Dawn is now using
this path.
Change-Id: Iffcbbc1c84e6bad0ebc51ded82d998bb307e2d6d
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/50564
Auto-Submit: James Price <jrprice@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Remove the Generator::GenerateEntryPoint() APIs as they were mostly
unimplemented and not used by anything except the Tint sample app,
which now uses the new transform.
Change-Id: I1ccb303d6c3aa15e622c193d33b753e22bf39a95
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/49160
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: James Price <jrprice@google.com>
These have now been removed from Dawn.
Change-Id: I50e784141e6eb07f4f0d3f508bb8c6199429dd63
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/48044
Auto-Submit: Ben Clayton <bclayton@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
Adds additional modes to the Renamer for renaming just HLSL or MSL
keywords. The sanitizers no longer rename reserved keywords
automatically, which isn't usually necessary anyway since Dawn renames
all symbols.
The tint executable automatically renames reserved keywords when
targeting HLSL and MSL. It now also has an option to rename
everything, which is useful for testing the renamer.
Change-Id: Idbfd53226805e851050024402be8d8f251b88707
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/47960
Commit-Queue: Ben Clayton <bclayton@chromium.org>
Auto-Submit: James Price <jrprice@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@chromium.org>
Otherwise warnings are not emitted unless there is also an error.
Change-Id: If417f75fbdd246b1f792a0f63b83274c8f2272e3
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/47481
Auto-Submit: James Price <jrprice@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: James Price <jrprice@google.com>
Avoids the need for downstream users to manually run this transform.
Change-Id: I0c63e2fd8b6ad49b752ed1757370e386171481cb
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/47440
Commit-Queue: James Price <jrprice@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Auto-Submit: James Price <jrprice@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Also update comments and arch design to remove references to the
Validator.
Bug: tint:642
Change-Id: Ic0b4779ae4712a393ff209014daf25e23f32be6d
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/47061
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Reviewed-by: James Price <jrprice@google.com>
Commit-Queue: Antonio Maiorano <amaiorano@google.com>
This replaces the entry point IO component of the HLSL sanitizing
transform, and completes support for the new entry point IO syntax.
Struct emission in the HLSL writer is updated to use the correct
attributes depending on the pipeline stage usage.
Fixed: tint:511
Change-Id: I6a30ed2182ee19b2f25262a30a83685ffcb5ef25
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/46521
Auto-Submit: James Price <jrprice@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: James Price <jrprice@google.com>
This replaces the entry point IO component of the MSL sanitizing
transform, and completes support for the new entry point IO syntax.
Struct emission in the MSL writer is updated to use the correct
attributes depending on the pipeline stage usage.
Fixed: tint:510
Change-Id: I7ace33568c5a6e1bbf5c90f67b920579ba14be78
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/46520
Auto-Submit: James Price <jrprice@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: James Price <jrprice@google.com>
This enum isn't being used in Dawn yet, so it is safe to change without
deprecating it first.
BUG=dawn:700
Change-Id: I0f3cc788f26a8001f82aba4f9b3920e84204e4e4
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/45620
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Auto-Submit: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Ben Clayton <bclayton@google.com>
Reviewed-by: David Neto <dneto@google.com>
Implements https://github.com/gpuweb/gpuweb/pull/1447
SPIR-V Reader is still TODO, but continues to function as the offset
decoration is still supported.
Bug: tint:626
Bug: tint:629
Change-Id: Id574eb3a5c6729559382812de37b23f0c68fd406
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/43640
Commit-Queue: Ben Clayton <bclayton@chromium.org>
Reviewed-by: David Neto <dneto@google.com>
Adding a flag to the tint sample binary that allows you to dump what
the inspector is reflecting about the bindings in a shader.
This has already helped me identify one blindspot in the validator.
BUG=tint:530
Change-Id: I6709f1d8f8391a1419d07abebf210e9e358e0861
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/43820
Reviewed-by: Ben Clayton <bclayton@google.com>
Auto-Submit: Ryan Harrison <rharrison@chromium.org>
Commit-Queue: Ben Clayton <bclayton@google.com>
Transforms are meant to be reusable. Those that hold state cannot be used concurrently.
State leakage between runs is dangerous.
To fix this:
* Add transform::Data - A new base class for extra information emitted by transforms.
* Add transform::DataMap - A container of Data, keyed by type.
* Add a transform::DataMap field to Transform::Output.
* Have FirstIndexOffset emit a FirstIndexOffset::Data.
* Deprecate the getters on the transform.
Mutability of the transform config is also dangerous as setters can be called while a transform is actively running on another thread.
To fix:
* Expose a VertexPulling::Config structure and add a constructor that accepts this.
* Deprecate the setters on VertexPulling.
Also deprecate Transform::Output::diagnostics.
Put all the transform diagnostics into the returned Program. Reduces error handling of the client.
Change-Id: Ibd228dc2fbf004ede4720e2d6019c024bc5934d1
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/42264
Reviewed-by: dan sinclair <dsinclair@chromium.org>
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
Commit-Queue: Ben Clayton <bclayton@google.com>
Appends an error message with the tint compiler source location to the
provided diagnositic list, and then calls the global error handler if
one is set.
Tests and the sample app now register an error handler to print the
diagnostic list to stderr and abort when NDEBUG is not defined.
All uses of assert(false) have been fixed up to use these macros.
Change-Id: I2f63e51ed86ac23883301d280070bd1a357c6cb2
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/41620
Commit-Queue: dan sinclair <dsinclair@chromium.org>
Reviewed-by: dan sinclair <dsinclair@chromium.org>
These transforms will perform work to massage the Program into something consumable by the given writer.
Change-Id: I8989e8d4bc1a9cae7ce1f8764c8f3811db3bd04d
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/41483
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: dan sinclair <dsinclair@chromium.org>
Otherwise the sample app crashes when using --dawn-validation with a
non-SPIR-V output format.
Change-Id: Ic6e03e758747602d15f3a1d5b9d9cefee1aad527
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/41120
Commit-Queue: dan sinclair <dsinclair@chromium.org>
Auto-Submit: James Price <jrprice@google.com>
Reviewed-by: dan sinclair <dsinclair@chromium.org>
* Fix how the HLSL writer determines how to use a RWByteAddressBuffer
* Fix how the HLSL writer decides the register space for a storage
variable
* Fix inference of hlsl format in the tint executable
* Add support for data packing intrinsics
* type determination
* validation
* writers
* spirv reader
Bug: tint:340, tint:473, tint:474
Change-Id: I45dc8fd7c6f9abc7d30f617c7e3d713d7965b76e
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/40342
Commit-Queue: Alan Baker <alanbaker@google.com>
Reviewed-by: dan sinclair <dsinclair@chromium.org>
Add helpers on Program and ProgramBuilder that significantly simplify
usage.
Also demangle - this also reduces a bunch of copy-pasta code.
Change-Id: I6215c346e7f6e49c20aced058a6150603253ed93
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/39342
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: dan sinclair <dsinclair@chromium.org>
Removes the need for Dawn to use the TypeDeterminer directly.
TypeDeterminer errors will be added to the Program diagnostics list.
Change-Id: I4cfb405e7e6b0e94727296eea872a3ddc4412b66
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/38921
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: dan sinclair <dsinclair@chromium.org>
By putting diagnostics into the program, we can hold all the diagnostic messages for parsing and type determination in one place.
This also means that we can simplify the public WGSL and SPIR-V Parser interfaces to a single function.
Change-Id: Ib6ab5fa180addd45c4aaf0c6b192d47182ffb50a
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/38920
Reviewed-by: dan sinclair <dsinclair@chromium.org>
Commit-Queue: Ben Clayton <bclayton@google.com>
Program is now immutable*, and remains part of the public Tint
interface.
ProgramBuilder is the mutable builder for Programs, and is not part of
the public Tint interface. ast::Builder has been folded into
ProgramBuilder.
Immutable Programs can be cloned into a mutable ProgramBuilder with
Program::CloneAsBuilder().
Mutable ProgramBuilders can be moved into immutable Programs.
* - mostly immutable. It still has a move constructor and move
assignment operator - required for practical usage - and the
semantic information on AST nodes is still mutable.
Bug: tint:390
Change-Id: Ia856c50b1880c2f95c91467a9eef5024cbc380c6
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/38240
Reviewed-by: dan sinclair <dsinclair@chromium.org>
Have this take a SymbolTable instead of a Program.
Program will be split into Program (immutable) and ProgramBuilder (mutable). We'll need Demangler to support both.
Bug: tint:390
Change-Id: I6447dd9674919d4867ed8ba126880cdfd9bf7128
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/38550
Reviewed-by: dan sinclair <dsinclair@chromium.org>
Enforce all places where Dawn passes in or returns a ast::Module, now takes a `const Program* ` or returns a `Program`.
As the end goal of all this is to have immutable Programs, all Program inputs take a pointer instead of moving the actual object.
As consumers of a Program are now all const, we have to const_cast to work around all the places we've been incorrectly mutating a ast::Module.
These const_casts are temporary, and will be fixed in the next set of changes.
Depends on https://dawn-review.googlesource.com/c/dawn/+/38522
Bug: tint:390
Change-Id: Ie05b112b16134937d1b601e9b713ea4ec4e1c677
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/38541
Reviewed-by: dan sinclair <dsinclair@chromium.org>
Clang will warn if using #if on an undefined macro
Change-Id: I2db83ccd0304c39dd7328607f4bce6d6f80ee0d6
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/37841
Auto-Submit: Ben Clayton <bclayton@google.com>
Reviewed-by: dan sinclair <dsinclair@chromium.org>
Commit-Queue: Ben Clayton <bclayton@google.com>
When building for Windows with VS2019 (using 'is_clang=false') with the
default "warnings as errors" this occurs multiple times, halting the
build:
../../third_party/tint/samples/main.cc(88): error C2220:
the following warning is treated as an error
../../third_party/tint/samples/main.cc(88): warning C4068:
unknown pragma 'clang'
Since there's no shared macro for marking potential unused params the
simplest route of a (void) cast is chosen.
Bug: dawn:602
Change-Id: I4e6316df97dc3cd7e45260e2f7471cdd5a9b4b94
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/37700
Commit-Queue: dan sinclair <dsinclair@chromium.org>
Reviewed-by: dan sinclair <dsinclair@chromium.org>
This CL reverts the changes to use the top level namer in the various
backends. This is causing issues when rolling into Dawn in the case
where the tint generator is used to create SPIR-V which is sent to
SPIRV-Cross but then generator and inspector aren't used. The entry
points end up being incorrect as SPIRV-Cross gets the renamed entry
points.
Change-Id: I4749e1d773f2bd9edcce83e63555f07a443d5ca5
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/37342
Reviewed-by: dan sinclair <dsinclair@chromium.org>
Commit-Queue: dan sinclair <dsinclair@chromium.org>
This CL changes the generators so we don't have to move the module into
the generator. This will then allow calling the demangler at a later
point and still having access to the module.
Change-Id: Icad16ddb2b89921cbb174cf7fec520c410139285
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/36942
Reviewed-by: Ben Clayton <bclayton@google.com>
The --demangle option preserves original source names
when dumping the AST or emitting text-based shader languages.
Change-Id: Iac450158c6b9f0ac780b7e5580cb02c41dd5df17
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/36480
Commit-Queue: David Neto <dneto@google.com>
Commit-Queue: dan sinclair <dsinclair@chromium.org>
Auto-Submit: David Neto <dneto@google.com>
Reviewed-by: dan sinclair <dsinclair@chromium.org>
instead of transform-in-place.
This is a public API breaking change, so I've added the `DAWN_USE_NEW_TINT_TRANSFORM_API` define which is used by Dawn to know which API to use.
As we're going to have to go through the effort of an API breaking change, use this as an opportunity to rename Transformer to Transform, and remove 'Transform' from each of the transforms themselves (they're already in the transform namespace).
Bug: tint:390
Bug: tint:389
Change-Id: I1017507524b76bb4ffd26b95e550ef53ddc891c9
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/34800
Reviewed-by: dan sinclair <dsinclair@chromium.org>
Commit-Queue: Ben Clayton <bclayton@google.com>
EmitVertexPointSizeTransform is a Transformer that adds a PointSize builtin global output variable to the module which is assigned 1.0 as the new first statement for all vertex stage entry points.
If the module does not contain a vertex pipeline stage entry point then then this transformer is a no-op.
Bug: tint:321
Change-Id: I0e01236339d9fa1ceab3622af0931a1199c33b99
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/34561
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: dan sinclair <dsinclair@chromium.org>
Stephen White
Antonio Maiorano
Alastair Donaldson
James Price
Ben Clayton
Corentin Wallez
Brandon Jones
David Neto
Ryan Harrison
Alan Baker
Carl Woffenden
dan sinclair
dan sinclair
Enrico Galli