Just having a "error: blah" emitted without any additional context is not helpful without seeing the parsed SPIR-V as WGSL.
Change-Id: I6bf665f7fd3ce2637ec1ab020b2215f7fd5ee482
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/71603
Commit-Queue: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: James Price <jrprice@google.com>
This change implements the behavior analysis for expressions and
statements as described in:
https://www.w3.org/TR/WGSL/#behaviors
This CL makes no changes to the validation rules. This will be done as a
followup change.
Bug: tint:1302
Change-Id: If0a251a7982ea15ff5d93b54a5cc5ed03ba60608
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/68408
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: David Neto <dneto@google.com>
The SwitchCaseBlockStatement was bound to the BlockStatement of an ast::CaseStatement, but we had nothing that mapped to the actual ast::CaseStatement.
sem::CaseStatement replaces sem::SwitchCaseBlockStatement, and has a Block() accessor, providing a superset of the old behavior.
With this, we can now easily validate the `fallthrough` rules directly, instead of scanning the switch case. This keeps the validation more tigtly coupled to the ast / sem nodes.
Change-Id: I0f22eba37bb164b9e071a6166c7a41fc1a5ac532
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/71460
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Produces a direct SEM -> SEM pointer, reducing AST <-> SEM hopping.
Change-Id: I233b4c47d4e55b5f2c6e14ed08699a302b8fb64d
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/71321
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Ben Clayton <bclayton@chromium.org>
Reviewed-by: James Price <jrprice@google.com>
Adds functionality and tests for performing the multiplanar external
texture transform on texture_external parameters in user-defined
functions.
Bug: dawn:1082
Change-Id: I15f23e639a6cd24ed3428055420908f05b69c0c6
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/70840
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Some versions of clang warn as error without this:
error: definition of implicit copy constructor for 'EnumSet<tint::ast::PipelineStage>' is deprecated because it has a user-declared copy assignment operator [-Werror,-Wdeprecated-copy]
Change-Id: I02cee0b1f7b70d74f29da0067e888b50acf27ee1
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/71600
Commit-Queue: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Add assignment operators and methods for adding, removing and operators for performing set arithmatic.
Change-Id: I13d30734354f503180f75480866b54034f647c2a
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/71320
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Nothing currently does the analysis to calculate these.
Change-Id: Ia2103102fbf36109f357aebf32cdfda24d6d8155
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/68407
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: David Neto <dneto@google.com>
Commit-Queue: Ben Clayton <bclayton@chromium.org>
Changing Mac version from 10.15 to 10.15|11
Also removes realms experiment, since it is no longer active and
lucicfg was emitting a warning about it.
BUG=chromium:1273569
Change-Id: I97308249c8cc21e677cbac9b34cd09aa4b471660
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/71220
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Auto-Submit: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: James Price <jrprice@google.com>
Break up Resolver::Statement() into multiple resolver functions.
Move simple statement validation out to resolver_validation.cc
Change-Id: Ifa29433af0a9afa39a66ac3e4f7ca376351adfbf
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/71102
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
This new expectation file was added with a similar parent that changed the expected output.
Bug: tint:1112
Change-Id: Icb6175f68b6459385933d39e07460eb863ecb9ff
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/71101
Commit-Queue: Ben Clayton <bclayton@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
This reverts commit 401d694d03.
Reason for revert: No Mac-11 in luci.flex
Original change's description:
> Update Mac version and remove stale experiment
>
> Moving Mac version from 10.15->11
>
> Also removes realms experiment, since it is no longer active and
> lucicfg was emitting a warning about it.
>
> BUG=chromium:1273569
>
> Change-Id: Ib0962a1330985da82336ea93cc9014c2439b452b
> Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/71020
> Auto-Submit: Ryan Harrison <rharrison@chromium.org>
> Reviewed-by: Corentin Wallez <cwallez@chromium.org>
> Commit-Queue: Ryan Harrison <rharrison@chromium.org>
> Kokoro: Kokoro <noreply+kokoro@google.com>
TBR=cwallez@chromium.org,rharrison@chromium.org,bclayton@google.com,noreply+kokoro@google.com,tint-scoped@luci-project-accounts.iam.gserviceaccount.com
Change-Id: I66d3d1dbed04ecee2ebf8566e3eb126977728a1a
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:1273569
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/71100
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Ben Clayton <bclayton@google.com>
Kokoro: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Ben Clayton <bclayton@google.com>
Now that I've landed this change to Dawn to disable FXC optimizations:
https://dawn-review.googlesource.com/c/dawn/+/70700,, we can reland this
change. The Tint-into-Dawn roll was failing because FXC would miscompile
certain loops into infinite loops when not unrolled.
Also reland
test/bug/fxc/gradient_in_varying_loop/1112.wgsl.expected.hlsl
Bug: tint:1112
Bug: dawn:1203
Change-Id: I641d68864b833e0fbe3b117d397b89ae96482536
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/71000
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: Antonio Maiorano <amaiorano@google.com>
If we encounter a global twice, the stack vector was not popped, which could trigger false cyclic-dependency errors. Because the cyclic dependency did not actually exist, later logic could break, expecting to find a global->global edge which did not exist.
Fixed: chromium:1273451
Change-Id: I9d99f1aeeaea042d9ed847a878c4717803122240
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/70980
Reviewed-by: David Neto <dneto@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
It's surprising that the fuzzers didn't find this, but I've confirmed that at least one of the fuzzers will fail with this case.
By adding a e2e test case, this will be used as a seed for the fuzzer corpus.
Bug: tint:1321
Change-Id: Ibf4bfa50bf376ae4cba401dfc31a2498fa3b9eec
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/70982
Reviewed-by: James Price <jrprice@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Moving Mac version from 10.15->11
Also removes realms experiment, since it is no longer active and
lucicfg was emitting a warning about it.
BUG=chromium:1273569
Change-Id: Ib0962a1330985da82336ea93cc9014c2439b452b
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/71020
Auto-Submit: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
RemovePhonies was transforming:
_ = f32(1)
_ = vec2<f32>(1.0, 2.0)
into:
f32(1)
vec2<f32>(1.0, 2.0)
Which the resolver gets grumpy about, as these are expressions, not statements.
Fixed: chromium:1273230
Change-Id: Ie85d3cee705fa3f792db686c021d76331e241f17
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/70960
Auto-Submit: Ben Clayton <bclayton@google.com>
Commit-Queue: James Price <jrprice@google.com>
Kokoro: Ben Clayton <bclayton@chromium.org>
Reviewed-by: James Price <jrprice@google.com>
Accidental commit of my test file for checking tint behavior.
Add to the .gitignore file so I don't accidentally check this in again.
Change-Id: Ie67f04cc307fa180d3a65d867a1777d008be8e17
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/70981
Auto-Submit: Ben Clayton <bclayton@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Kokoro: Ben Clayton <bclayton@google.com>
The default implementation of this was generating random data for
the underlying pointers of std::unordered_map, leading to crashes
when the map was accessed. This CL populates the map in a
structured manner with pseudo-random data.
Bug: chromium:1273001
Change-Id: Ic20ecab85bedba2a59587ebe4a5016be6e53e6f8
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/70701
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Austin Eng <enga@chromium.org>
BUG=tint:1019
Change-Id: Ia462080877a97348c5589bfa71231a832a7ebfd3
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/70081
Auto-Submit: Ryan Harrison <rharrison@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
If the HLSL sanitizer errors, then there may be no ArrayLengthFromUniform::Result, so we check the pointer before attempting to dereference it.
Bug: chromium:1273230
Change-Id: I9575d20748720623a94ac86f45da14302b20440a
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/70740
Auto-Submit: Ben Clayton <bclayton@google.com>
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: James Price <jrprice@google.com>
Commit-Queue: James Price <jrprice@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Add transform::Unshadow to renamed shadowed symbols. Required by a
number of other transforms.
Replace Resolver symbol resolution with dep-graph.
The dependency graph now performs full symbol resolution before the
regular resolver pass.
Make use of this instead of duplicating the effort.
Simplfies code, and actually performs variable shadowing consistently.
Fixed: tint:819
Bug: tint:1266
Change-Id: I595d1812aebe1d79d2d32e724ff90de36e74cf4b
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/70523
Reviewed-by: David Neto <dneto@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
They are always used together, and can actually be simplified when
combined.
This transform cannot currently deal with shadowing, and will need
need to depend on a new 'unshadow' transform.
Fixes a long-standing bug where we'd get an ICE if we attempt to inline
a pointer let declaration with side-effects in a for-loop initializer.
Fixed: tint:1321
Bug: tint:819
Change-Id: I236fed688e33a4996e47310b5ece44c991b5249f
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/70661
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: James Price <jrprice@google.com>
The error message has recently changed, and is causing rolls to fail.
I don't see any reason why we're testing SPIR-V val here. Just remove the test.
Bug: tint:912
Change-Id: Ia24f81a8cc86edafe893493279f7aaa73f1d746a
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/70666
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: David Neto <dneto@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
These have all been removed from the spec as we cannot guarantee they will behave as expected on the various backends.
Bug: tint:1312
Change-Id: I9d7d81cfdc44489fffe08c5183ed8da84901a024
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/70665
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Looks like this should have been part of bc5d8f6b
Bug: tint:1112
Change-Id: I62e98bbb5f8ca29a171d5d5baa65af55b3a090d4
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/70664
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
These also need to depend on types / values.
Bug: tint:819
Bug: tint:1266
Change-Id: Ia044d7823aca845dc57a887a164e07137d913429
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/70522
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>
A find or return-default utility.
Rename `find_or_replace.h` to `map.h` which contains both these utilties that operate on maps.
Change-Id: Iaa76ea3f5c5a1210e413c131dd0556c126ee5d0a
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/70521
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Update the script to check coverage generation is enabled, and provide a sensible error message if it is not.
Change-Id: I42f2b97d18bb3be2d081200cb682ea310476943f
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/70520
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Ben Clayton <bclayton@chromium.org>
Reviewed-by: David Neto <dneto@google.com>
The storageBarrier() builtin causes flushes to be visible to
all invocations within a workgroup, not the whole device.
The limitation is inherited from Metal.
Fixes: tint:1310
Change-Id: I6f94faa88bd3c7b6cec0601312c6c65a907c5973
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/69800
Auto-Submit: David Neto <dneto@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
This reverts commit 11d09f2fe7.
Reason for revert: Failing roll of Tint to Dawn: https://dawn-review.googlesource.com/c/dawn/+/70100
Original change's description:
> HLSL: force FXC to never unroll loops
>
> Emit the "[loop]" attribute on "for" and "while" so that FXC does not
> attempt to unroll them. This is to work around an FXC bug where it fails
> to unroll loops with gradient operations.
>
> FXC ostensibly unrolls such loops because gradient operations require
> uniform control flow, and loops that have varying iterations may
> possibly not be uniform. Tint will eventually validate that control flow
> is indeed uniform, so forcing FXC to avoid unrolling in these cases
> should be fine.
>
> Bug: tint:1112
> Change-Id: I10077f8b62fbbb230a0003f3864c75a8fe0e1d18
> Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/69880
> Kokoro: Kokoro <noreply+kokoro@google.com>
> Reviewed-by: Ben Clayton <bclayton@google.com>
> Commit-Queue: Antonio Maiorano <amaiorano@google.com>
# Not skipping CQ checks because original CL landed > 1 day ago.
Bug: tint:1112
Change-Id: I8e8f3c0abfa6e6bc5d0e67af9428a46ef867d5c1
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/70540
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>
No need for the HLSL-style repeated swizzle; GLSL allows construction
of a vector from a scalar value of the component type.
Bug: tint:1317
Change-Id: Ia0afe3012cbb56716a2d1c5c3849dd662a5ff89c
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/70342
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: Stephen White <senorblanco@chromium.org>
'__' is reserved in C++, and the 'match__' and 'build__' functions are causing OSS-fuzz builds to fail.
Add the change in tint behavior to the OT notes.
Add end to end tests for underscores. While the GLSL and MSL compilers seem to accept leading and double underscores in identifiers, the tint build failure has highlighted we have more work to do here (crbug.com/tint/1319)
Fixed: oss-fuzz:41214
Bug: tint:1292
Bug: tint:1319
Change-Id: I32b7bf4e0cff26e678b788457f90452c2503da50
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/70480
Commit-Queue: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: David Neto <dneto@google.com>
Performs a module-scope (global) declaration dependency analysis, so
that out-of-order global declarations can be re-ordered into dependency
order for consumption by the resolver.
The WGSL working group are currently debating whether out-of-order
declarations should be included in WebGPU V1, so this implementation
currently errors if module-scope declarations are declared out-of-order,
and the resolver does not currently use this sorted global list.
The analysis does however provide significantly better error diagnostics
when cyclic dependencies are formed, and when globals are declared
out-of-order.
The DependencyGraph also correctly now detects symbol collisions between
functions and types (tint:1308).
With this change, validation is duplicated between the DependencyGraph
and the Resolver. The now-unreachable validation will be removed from
the Resolver with a followup change.
Fixed: tint:1308
Bug: tint:1266
Change-Id: I809c23a069a86cf429f5ec8ef3ad9a98246766ab
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/69381
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Ben Clayton <bclayton@chromium.org>
Reviewed-by: David Neto <dneto@google.com>
Vulkan requires round-to-nearest when converting from a float
coordinate to an integer array layer. It prefers round-to-nearest-even.
Use round-to-nearest-even, instad of relying on the rounding behaviour
of the i32(f32) overload.
Fixes: tint:1316
Change-Id: I43624e25e8ea27d3a6e04841a911bbb9418810d0
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/70343
Auto-Submit: David Neto <dneto@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Try to lex identifiers before punctuation, and backtrack if we only
see a single underscore or something that starts with two underscores.
Rename the modf and frexp return types to start with two underscores.
Spec PR:
https://github.com/gpuweb/gpuweb/pull/2326
Change-Id: Id283af100babfe84faa183345cb8a60848140caa
Fixed: tint:1292
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/70160
Reviewed-by: David Neto <dneto@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: James Price <jrprice@google.com>
Use imageSize() on images, not textureSize().
In GLSL, the LOD parameter to textureSize() is mandatory for
sampled textures, so emit a default 0 if not supplied. (Also, don't pack
the level into the coords argument; that's an HLSLism.)
GLSL returns the array size of array textures in the final component
of textureSize(); remove it for WGSL.
Write the subtype of storage images correctly (uimage*, iimage*, etc).
This required a bit of cleanup to move "writeonly" ahead of subtype
emission.
Bug: tint:1298
Change-Id: Ica1cec0f833a9b684143c8b0cf6d090fb511a7d2
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/70140
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Stephen White <senorblanco@chromium.org>
Reviewed-by: Ben Clayton <bclayton@google.com>
ArrayLengthFromUniform is needed for correct bounds checks on
dynamic storage buffers on D3D12. The intrinsic GetDimensions does
not return the actual size of the buffer binding.
ArrayLengthFromUniform is updated to output the indices of the
uniform buffer that are statically used. This allows Dawn to minimize
the amount of data needed to upload into the uniform buffer.
These output indices are returned on the HLSL/MSL generator result.
ArrayLengthFromUniform is also updated to allow only some of the
arrayLength calls to be replaced with uniform buffer loads. For HLSL
output, the remaining arrayLength computations will continue to use
GetDimensions(). For MSL, it is invalid to not specify an index into
the uniform buffer for all storage buffers.
After Dawn is updated to use the array_length_from_uniform option in the
Metal backend, the buffer_size_ubo_index member for MSL output may be
removed.
Bug: dawn:429
Change-Id: I9da4ec4a20882e9f1bfa5bb026725d72529eff26
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/69301
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: James Price <jrprice@google.com>
Commit-Queue: Austin Eng <enga@chromium.org>
resolver.cc has grown very large, and is difficult to navigate.
The logic is identical to before, but validation logic has been moved to its own .cc file.
Bug: tint:1313
Change-Id: I4b7f3208815efe8ff02f2ad006b7cd31b5e37006
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/69380
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Gerrit configuration changes now require a +2 code review from an OWNER before changes can land.
Add the all core team members to the OWNERS file.
Change-Id: I696ca1afeae1cae80c04b1644a60482f932586ab
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/70023
Auto-Submit: Ben Clayton <bclayton@google.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Ben Clayton <bclayton@google.com>
Kokoro: Ben Clayton <bclayton@google.com>
Emit the "[loop]" attribute on "for" and "while" so that FXC does not
attempt to unroll them. This is to work around an FXC bug where it fails
to unroll loops with gradient operations.
FXC ostensibly unrolls such loops because gradient operations require
uniform control flow, and loops that have varying iterations may
possibly not be uniform. Tint will eventually validate that control flow
is indeed uniform, so forcing FXC to avoid unrolling in these cases
should be fine.
Bug: tint:1112
Change-Id: I10077f8b62fbbb230a0003f3864c75a8fe0e1d18
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/69880
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: Antonio Maiorano <amaiorano@google.com>
Ben Clayton
Brandon Jones
Ryan Harrison
Corentin Wallez
Antonio Maiorano
Austin Eng
Shrek Shao
David Neto
Stephen White
James Price