This is a major reworking of this transform. The old transform code
was getting unwieldy, with part of the complication coming from the
handling of multiple return statements. By generating a wrapper
function instead, we can avoid a lot of this complexity.
The original entry point function is stripped of all shader IO
attributes (as well as `stage` and `workgroup_size`), but the body is
left unmodified. A new entry point wrapper function is introduced
which calls the original function, packing/unpacking the shader inputs
as necessary, and propagates the result to the corresponding shader
outputs.
The new code has been refactored to use a state object with the
different parts of the transform split into separate functions, which
makes it much more manageable.
Fixed: tint:1076
Bug: tint:920
Change-Id: I3490a0ea7a3509a4e198ce730e476516649d8d96
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/60521
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@google.com>
Add `out` parameters to expression and type generators.
Use the new helper classes in TextGenerator.
Cleans up bad formatting.
Prepares the writer generating 'pre' statements, required for atomics.
If-else statements are generated slightly differently. This is done so that 'pre' statements for the else conditions are scoped correctly. This is identical to the HLSL writer.
Bug tint:892
Change-Id: I4c6e96c90673ba30898b3682bf3198497d63a2d4
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/56067
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: James Price <jrprice@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Mostly just deleting unneeded code, and a few additional cleanups as a
result.
Bug: tint:697
Change-Id: I31ceea93feb34994f51a1b6d294a35cf0c127447
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/55282
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: James Price <jrprice@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
And replace the MSL writer's logic to do this with the transform.
We need to do the same thing in HLSL, and in the future GLSL too.
Partially reverts fbfde720
Change-Id: Ie280e011bc3ded8e15ccacc0aeb12da3c2407389
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/54242
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: James Price <jrprice@google.com>
We have the end-to-end test-runner which validates all this stuff.
There's no need to also Validate in the unit tests.
Change-Id: I8fbc1ecd395efcedec4aa41085e691c88f3b66a5
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/54160
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Reviewed-by: James Price <jrprice@google.com>
TypeDecls (alias, structure) are not a types - they declare types.
ast::TypeName is what's used for a ast::Type.
Previously we were trying to automatically convert these to TypeNames in the builder, but having these inherit from ast::Type was extremely error prone.
reader/spirv was actually constructing ast::Structs and using them as types, which is invalid.
Change-Id: I05773ad6d488626606019015b84217a5a55a8e8a
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/53802
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Handle access control on var declarations instead of via [[access]]
decorations. This change does the minimal work to migrate the WGSL
parser over to the new syntax. Additional changes will be needed
to correctly generate defaulted access qualifiers, as well as
validating access usage.
The [[access]] decorations are still supported by the WGSL parser,
with new deprecated warnings, but not for aliases. Example:
var x : [[access(x)]] alias_to_struct;
Making this work is far more effort than I want to dedicate to backwards
compatibility, and I do not beleive any real-world usage will be doing
this.
Still TODO:
* Adding access control as the optional, third parameter to ptr<>.
* Calculating default accesses for the various storage types.
* Validating usage of variables against the different accesses.
Bug: tint:846
Change-Id: If8ca82e5d16ec319ecd01f9a2cafffd930963bde
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/53088
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: James Price <jrprice@google.com>
Reviewed-by: David Neto <dneto@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
and allow them in any order.
We're about to add Yet Another optional parameter - access control.
For style, we probably want this field before the decorations, however
that means adding more default values for all the cases where we don't
need to specify the access control.
Instead use some template magic to allow extra parameters to be
specified in any order, and entirely optional, with sensible defaults.
This keeps things readable and without huge code refactorings.
Bug: tint:846
Change-Id: I4f61eb765de63ad98ae786d187d2bd1b42942756
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/53087
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Add a config parameter for the CanonicalizeEntryPoint transform that
selects between emitting builtins as parameters (for MSL) or struct
members (for HLSL).
This fixes all of the shader IO issues in Tint's E2E tests for MSL.
Fixed: tint:817
Change-Id: Ieb31cdbd2e4d96ac41f8d8515fd07ead8241d770
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/53282
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: James Price <jrprice@google.com>
This fixes constructors for structures that contain padding members
due to explicit layout attributes.
Also fix one test that was wrongly using an identity type constructor
for a structure.
Fixed: tint:853
Change-Id: I0a3e84fcd7c6a7f2ad92a4970ed11378e6ce2465
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/53240
Auto-Submit: James Price <jrprice@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: James Price <jrprice@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
This allows them to be used in various places that WGSL allows, such
as function return types and parameters, and as the type of the RHS of
an assignment.
Fixed: tint:814
Fixed: tint:820
Change-Id: Idb6a901b9a34e96bb9733cc158191e7b3bafaa0e
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/52844
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@google.com>
Pull the HLSL transformation out to a standalone transform that can be
used by both HLSL and MSL.
The new E2E tests do not yet pass for MSL because they produce array
assignments, which will be addressed in the next patch.
Fixed: tint:826
Change-Id: Idc27c81ad45e3d4ab96d82663927d2fc1384618e
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/52842
Auto-Submit: James Price <jrprice@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
This fixes issues with passing constant arrays to functions.
Change-Id: I6e2f1c3f64df836c0b6a55ab925cf3c2bc317733
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/51861
Auto-Submit: James Price <jrprice@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
The special-case for zero-valued constructors is unnecessary, as an
empty initializer list already correctly zero-initializes for all
types. This was causing an additional {} to be emitted for empty
structures, which the MSL compiler rejects.
Fixed: tint:821
Change-Id: Ib48c73eadef15b517e14b248229ecfbbfeb13f81
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/51822
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>
Kokoro: Kokoro <noreply+kokoro@google.com>
This change implements pointers and references as described by the WGSL
specification change in https://github.com/gpuweb/gpuweb/pull/1569.
reader/spirv:
* Now emits address-of `&expr` and indirection `*expr` operators as
needed.
* As an identifier may now resolve to a pointer or reference type
depending on whether the declaration is a `var`, `let` or
parameter, `Function::identifier_values_` has been changed from
an ID set to an ID -> Type* map.
resolver:
* Now correctly resolves all expressions to either a value type,
reference type or pointer type.
* Validates pointer / reference rules on assignment, `var` and `let`
construction, and usage.
* Handles the address-of and indirection operators.
* No longer does any implicit loads of pointer types.
* Storage class validation is still TODO (crbug.com/tint/809)
writer/spirv:
* Correctly handles variables and expressions of pointer and
reference types, emitting OpLoads where necessary.
test:
* Lots of new test cases
Fixed: tint:727
Change-Id: I77d3281590e35e5a3122f5b74cdeb71a6fe51f74
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/50740
Commit-Queue: Ben Clayton <bclayton@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: David Neto <dneto@google.com>
In preparation for implementing
https://github.com/gpuweb/gpuweb/issues/1604, this change removes the
sem::AccessControl node. Instead, the ast::AccessControl::Access enum is
now on the sem::StorageTexture class, as well as on sem::Variable. For
sem::Variable, the field is set when the variable's type is either a
storage buffer or a storage texture.
Bug: tint:802
Change-Id: Id479af36b401d067b015027923f4e715f5f69f25
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/51020
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: Antonio Maiorano <amaiorano@google.com>
To declare a local variable, we write `var name : type`, not `var<function> name : type`.
This change fixes all the places where we were feeding StorageClass::kFunction into variable declarations.
Note that the resolved, semantic variable correctly infers the `kFunction` StorageClass.
Change-Id: I6221fabae1de0435044f29b9a91808421d5cace6
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/50821
Commit-Queue: Ben Clayton <bclayton@chromium.org>
Commit-Queue: David Neto <dneto@google.com>
Auto-Submit: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: David Neto <dneto@google.com>
There's now no need to have both.
Removes a whole bunch of Sem().Get() smell, and simplifies the resolver.
Bug: tint:724
Fixed: tint:761
Change-Id: I756a32680ac52441fd6eebf6fc53dd507ef5e538
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/49961
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Register all aliases, and don't share type nodes
Bug: tint:724
Change-Id: I7ac20c8a75f232fa7fe1e8c1a5690f411888f6e4
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/49750
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Used as a stepping stone to emitting the ast::Types instead.
Bug: tint:724
Change-Id: Ib2d6c150fe8aa7c1e2c502676922b14b1518a4be
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/48686
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
A general code cleanup
Change-Id: Ib251ca2d4b71f75736bdba8b4255965593a76c31
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/48680
Auto-Submit: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Reviewed-by: James Price <jrprice@google.com>
Commit-Queue: Antonio Maiorano <amaiorano@google.com>
Fixed: tint:94
Change-Id: I1d3e512c030ec16031b8c8fcfbde0cd1db5d1ea4
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/48380
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: James Price <jrprice@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
By making nodes reachable, the resolver has now caught a whole lot of additional problems, which have been fixed in this CL.
Some of these broken tests were attempting to use private and workgroup variables as function-scope declarations.
This is not legal, and these have been moved to module-scope variables.
Bug: tint:469
Change-Id: I1fc3a10fa0e39e1c290a13323277d6e9257778c4
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/48048
Commit-Queue: Ben Clayton <bclayton@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: James Price <jrprice@google.com>
Fix a test that did not have the position builtin as a vertex shader
output.
Change-Id: I8dceba59d8327938e725e7d5e62b4b9c43695710
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/47820
Reviewed-by: Ben Clayton <bclayton@chromium.org>
Commit-Queue: James Price <jrprice@google.com>
Auto-Submit: James Price <jrprice@google.com>
Use the variable storage class to determine the correct builtin to use
in the SPIR-V generator.
Added a deprecation warning for frag_coord.
Bug: tint:714
Change-Id: I5ad4956f9345e2f39f4af16e84668dec345ac82e
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/47742
Auto-Submit: James Price <jrprice@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
SymbolTable::New() used to build and return a symbol without a registered name. When you asked for the name of the symbol it would return tint_symbol_N, where N is the numerical identifier for the symbol.
This approach was a major tripping hazzard for transforms that liked to fetch the source program name, and register it in the new program (in this situation, you should always use `CloneContext::Clone(Symbol)`).
Without special casing for unnamed symbols, you could end up promoting the unnamed symbol to a named symbol, and then colliding against a new unnamed symbol.
This is exactly what happened in tint:711.
Instead, with this change:
* The concept of unnamed symbols has been removed. All symbols now have a name.
* The signature of `SymbolTable::New()` has been changed to take a name parameter (which defaults to 'tint_symbol'). This can be used to create a new, unique named symbol (possibly with a suffix), which will not collide with any existing symbols. Note these symbols may still collide if `SymbolTable::Register()` is called with the same name. All Transforms that currently use `SymbolTable::Register()` will be fixed in another change.
* The CloneContext has been updated to use `SymbolTable::New()` instead of `Register()`. This means that any symbols defined before a clone will not collide.
* `CloneContext::CloneSymbols()` has been added which allows a transform to pre-clone all the symbols from the source program. This can be used to avoid the authored identifiers being suffixed with a number, in the case a transform calls New() before the symbol is cloned.
* `Symbol::to_str()` has been changed to return `$<id>` instead of `tint_symbol_N`. This is to avoid any confusion between the actual name and the symbol ID.
Bug: tint:711
Bug: tint:712
Change-Id: I526e4b49b7027545613859de487e6a275686107a
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/47631
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Fix some SPIR-V tests that were wrongly expecting parameters to be
loaded from memory as a result of them not being const.
Change-Id: Ieab6f1edd4a4ba6efd226fe190e7a49b309048c5
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/47281
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: James Price <jrprice@google.com>
Auto-Submit: James Price <jrprice@google.com>
Reviewed-by: Ben Clayton <bclayton@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>
Fix msl tests that were impacted by this
Change-Id: I00f4280c2f059358d9187babda9e44f2d16b096e
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/45244
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: David Neto <dneto@google.com>
Avoid cloning parameters until we know we are going to rewrite the
function.
Change-Id: I0b0e2513d8652a0f2e561419848f77875d67591b
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/44600
Commit-Queue: James Price <jrprice@google.com>
Reviewed-by: Ben Clayton <bclayton@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>
Add a sanitizing transform to collect location-decorated parameters
into a struct.
Bug: tint:510
Change-Id: I1e9bf829dac946e5fec0ecfe6da7e1ef9cebff8e
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/44322
Commit-Queue: James Price <jrprice@google.com>
Auto-Submit: James Price <jrprice@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Remove the decoration groupings (Array, Function, Struct,
StructMember, Type, Variable), such that all *Decoration classes now
subclass ast::Decoration directly. This allows for decorations to be
used in multiple places; for example, builtin decorations are now
valid for both variables and struct members.
Checking that decoration lists only contain decorations that are valid
for the node that they are attached to is now done inside the
validator.
Change-Id: Ie8c0e53e5730a7dedea50a1dec8f26f9e7b00e8d
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/44320
Commit-Queue: James Price <jrprice@google.com>
Reviewed-by: Ben Clayton <bclayton@chromium.org>
All includes from .cc to .h are preserved, even when transitively included.
It's clear that there are far too many includes in header files, and we should be more aggressive with forward declarations. tint:532 will continue to track this work.
There are, however, plenty of includes that have accumulated over time which are no longer required directly or transitively, so this change starts with a clean slate of *required* includes.
Bug: tint:532
Change-Id: Ie1718dad565f8309fa180ef91bcf3920e76dba18
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/44042
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Move out of the src root and into its own subdirectory
Rename methods to remove the 'Determine' prefix.
Fixed: tint:529
Change-Id: Idf89d647780f8a2e7495c1c9e6c402e00ad45b7c
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/44041
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: David Neto <dneto@google.com>
This is now entirely handled as transforms.
Bug: tint:273
Change-Id: Ib3c0db7b5ecf024b6ae2aed7788e4b582d07c4ce
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/43983
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: James Price <jrprice@google.com>
This CL updates the MSL backend to emit a using namespace for metal
instead of using the `metal::` prefix.
Bug: tint:463
Change-Id: I63d3ea5b5a56e61d71cd6d17a51a5120363ea007
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/42741
Auto-Submit: dan sinclair <dsinclair@chromium.org>
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: dan sinclair <dsinclair@chromium.org>
Storage classes are unused for constants.
Also trim extra arguments to these variable constructor functions that are already defaulted to the same value.
Change-Id: Ia0b44364de000bfb8799de15827ce08fcce5f5be
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/41541
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: dan sinclair <dsinclair@chromium.org>
Reviewed-by: David Neto <dneto@google.com>
Move the storage parameter after type.
Const() has no use for storage classes, so this parameter will be removed in the next change.
This reordering keeps Var() and Const() parameter types identical for the first two non-optional fields
Change-Id: I66669d19fa2175c4f10f615941e69efcab4c23e1
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/41540
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: dan sinclair <dsinclair@chromium.org>
Make private all TypeDeterminer::DetermineXXX() methods, forcing all tests to use the root-level TypeDeterminer::Determine() method.
Remove TypeDeterminer::RegisterVariableForTesting().
The main use for calling the TypeDeterminer::DetermineXXX() methods was to perform type determination on a partial AST.
This was messy and often resulting in multiple calls into TypeDeterminer. Most tests already perform a full TypeDeterminer::Determine() call when the program is built, so many of these were redundant.
The exposure of these internal methods for testing also makes refactoring the TypeDeterminer extremely difficult.
Add a number of ProgramBuilder helper methods for attaching the partial AST in these tests to the root of the AST, greatly simplifying the use of the TypeDeterminer:
* ProgramBuilder::Global() and ProgramBuilder::GlobalConst() are helpers that register the variable returned by ProgramBuilder::Var() and ProgramBuilder::Const(), respectively.
* ProgramBuilder::WrapInFunction() is a variadic function that accepts variables, expressions and statements, attaching these to the root of the AST via a dummy function.
Most test classes now no longer use their own TypeDeterminer, and instead properly depend on the automatic type determination performed at Program build time.
Bug: tint:390
Change-Id: Ie901890420c5de170cdf2a7aaef9b96fc3bebd60
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/40062
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: David Neto <dneto@google.com>
With the ast::Module::Functions().
Also remove pointless calls to td.Determine() that will automatically be
done when the program is built.
Change-Id: Ia7506e430b04d91d4f6b02fb6b678d0ea9912bcd
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/39900
Commit-Queue: dan sinclair <dsinclair@chromium.org>
Reviewed-by: dan sinclair <dsinclair@chromium.org>
This builder will be merged into ProgramBuilder, where these will become methods.
To breakup this change, perform the refactoring as a separate change.
Bug: tint:390
Change-Id: I2c9151cd9f198e99d88eaf296dd994293df6c425
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/38720
Reviewed-by: dan sinclair <dsinclair@chromium.org>
This is required in order to support move operators for TypesBuilder.
Bug: tint:390
Change-Id: I9667bda5f5be267df092f5cd94dc40db053ae6e2
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/38555
Reviewed-by: dan sinclair <dsinclair@chromium.org>
