This removes the assert from the SPIR-V generator so the
tests compile. The generated SPIR-V is incorrect. The next
CL fixes the generator, and restores the assert.
Change-Id: I77b507cf7fb5eac481322887000bd1c73cd5c899
Bug: skia:13219
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/530336
Reviewed-by: John Stiles <johnstiles@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
This is a reland of commit 60ff0facbf
Structs are now deduplicated using a [Type*, SpvId] map.
Original change's description:
> Use op cache when emitting types.
>
> We no longer need to maintain a separate `fTypeMap` for mapping types
> to SpvIds, since the op cache handles this automatically.
>
> We also now support deduplicating instructions that don't have a result,
> such as decorations. (In particular, we needed to avoid emitting the
> SpvDecorationArrayStride op every time the array type was accessed, but
> this op doesn't have a result ID.)
>
> Change-Id: I779b8c8e3de5973b8f487b28c0a8ece9a1041845
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/529732
> Reviewed-by: Brian Osman <brianosman@google.com>
> Commit-Queue: John Stiles <johnstiles@google.com>
> Auto-Submit: John Stiles <johnstiles@google.com>
Change-Id: I9f6a78d58e8af38a1fd690a8860d8b5aa3193be6
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/529748
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Change-Id: I800fa2a1fb0e64ad478c76ea2d5cda176ea8f48b
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/529746
Auto-Submit: Brian Osman <brianosman@google.com>
Reviewed-by: John Stiles <johnstiles@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
This reverts commit 60ff0facbf.
Reason for revert: Broke D3D bots
Original change's description:
> Use op cache when emitting types.
>
> We no longer need to maintain a separate `fTypeMap` for mapping types
> to SpvIds, since the op cache handles this automatically.
>
> We also now support deduplicating instructions that don't have a result,
> such as decorations. (In particular, we needed to avoid emitting the
> SpvDecorationArrayStride op every time the array type was accessed, but
> this op doesn't have a result ID.)
>
> Change-Id: I779b8c8e3de5973b8f487b28c0a8ece9a1041845
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/529732
> Reviewed-by: Brian Osman <brianosman@google.com>
> Commit-Queue: John Stiles <johnstiles@google.com>
> Auto-Submit: John Stiles <johnstiles@google.com>
Change-Id: I0e2187f88f2a945fd6f88ce75ff815e03d2f7df5
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/529747
Auto-Submit: Brian Osman <brianosman@google.com>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
We no longer need to maintain a separate `fTypeMap` for mapping types
to SpvIds, since the op cache handles this automatically.
We also now support deduplicating instructions that don't have a result,
such as decorations. (In particular, we needed to avoid emitting the
SpvDecorationArrayStride op every time the array type was accessed, but
this op doesn't have a result ID.)
Change-Id: I779b8c8e3de5973b8f487b28c0a8ece9a1041845
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/529732
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Previously, we stringized the types and put them into fTypeMap. Using
the op cache is a simpler mechanism that should work equally well.
Output diffs are almost all ID reorderings. In a few cases we
managed to deduplicate function types that stringize differently but
come out the same in SPIR-V (e.g. no float/half distinction).
Change-Id: If7de5b2dafa12d05c3c2c497a243e9e3908dfee7
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/529805
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Change-Id: I3f6e25ec7b31339bfc9bd2435bc9226e6d9be06b
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/529498
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Change-Id: Ic19d7591c90f75f04dd1c58b406f2b770f9780c7
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/529351
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
If we start with an OpConstantComposite, then we do an
OpCompositeExtract from it, we can look up the result directly from op
cache and avoid doing any work. This helps our matrix code a lot.
Change-Id: Idfbdc0c69676b9c1e91cdc57bf0d6382b9b5d8d4
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/529339
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
https://en.cppreference.com/w/cpp/container/span/subspan
The real std::span::subspan in C++20 allows the "count" argument to
default to `std::dynamic_extent` (a fancy way of spelling ~0U). I didn't
think it would be worth adding `skstd::dynamic_extent`, but I did have
a use for an unbounded subspan, so I added a single-argument version to
SkSpan.
Change-Id: I297cc452cf2db727a3f9869ff8f46f3527e19370
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/529603
Reviewed-by: Arman Uguray <armansito@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Previously, we didn't usually generate OpConstantComposite ops for
matrices. Now, a matrix assembled from constants should come out as a
constant.
Change-Id: I458718901686dffb84e4079a81017d61195420d3
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/529338
Reviewed-by: Arman Uguray <armansito@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
The output changes here are almost entirely a wash, because we already
had support for caching scalars and vectors. Almost all changes are just
inconsequential reorderings of IDs, and the removal of RelaxedPrecision
decorators on constants (which were not meaningful).
Change-Id: I45340c4a240cb504b7c4a934b3db178d2f39ec99
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/528709
Reviewed-by: Arman Uguray <armansito@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Change-Id: Ia799cdff5288efe5d5d53e8d8f77cf32f3343371
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/529131
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
Rearrange SkGlyphRect so that leftTop is negative. This makes
calculating width and height = rightBottom + leftTop. Then we
can use this as the dimensions of the glyph in the digest.
Rename: topLeft to leftTop.
Bug: skia:13192
Change-Id: If06ebf6e595f380f8fbb9a3381e87945e312eceb
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/529336
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Herb Derby <herb@google.com>
Make the glyph buffers use the same Direct position calculations
for Bitmap and GPU processing. This will create fewer changes when
switching to SkGlyphDigest based API.
Bug: skia:13192
Change-Id: I7e3e44dcfc1a4bad014d0ebe2bef3c1b28c712f4
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/529277
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Herb Derby <herb@google.com>
Bug: skia:12701
Change-Id: Ib02db7160599d3c15a01597c746ce5131f2998e0
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/526298
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
This is a reland of commit ae5e846047
Original change's description:
> [graphite] Move Graphite into Skia base directories.
>
> Change-Id: Ie0fb74f3766a8b33387c145bd1151344c25808cb
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/528708
> Reviewed-by: Kevin Lubick <kjlubick@google.com>
> Reviewed-by: Greg Daniel <egdaniel@google.com>
> Commit-Queue: Jim Van Verth <jvanverth@google.com>
Change-Id: Ia575fd49206ad0b665a6a9153317e738bb321446
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/529059
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
* Wire up the WGSLCodeGenerator to SkSLCompiler.
* Wire up build rules to generate WGSL from unit tests.
* Include HelloWorld.sksl as the first complete program.
Bug: skia:13092
Change-Id: I283cf5971b6856126b9fc23340afacff5cc54697
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/526760
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Reviewed-by: John Stiles <johnstiles@google.com>
Commit-Queue: Arman Uguray <armansito@google.com>
Bug: skia:12701
Change-Id: Iaac8b6fd0f2d9d1f8d5771f8204047a9127184c1
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/528041
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
Previously, we used unscoped blocks for two similar functions:
- Rewrite one statement as two simpler statements:
`int a, b;` -> `int a; int b;`
- Group together multiple statements without braces. e.g. the inliner
uses unscoped Blocks to rearrange statements.
Conceptually, these are different from the debugger's perspective. The
compound statements should be treated as one unit; the grouped
statements should be treated individually (and the enclosing Block
should be ignored). A Block now contains a BlockKind enum to
distinguish between these cases.
Change-Id: Ie14a570bb46992689fb96b8fd3b67f2ca6e5239f
Bug: skia:13189
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/528655
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Change-Id: If3d7e222023efb957eba66adc1f9ca601c2ffd67
Bug: skia:13189
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/528916
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
This CL defines a const label string in GrSurfaceProxy and have the
constructors accept it. The label string is then plumbed through the
system for other components to accept it.
Bug: chromium:1164111
Change-Id: I5a7f7708707e3d486eb1f8931db4c49afba5a33b
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/525236
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
Change-Id: Ie0fb74f3766a8b33387c145bd1151344c25808cb
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/528708
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
It was decided that being able to report positions from C++ code is not
worth the cost of having all of these captures everywhere.
Change-Id: I94981d9f780bd95df8b56198210c9cdd5f16239c
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/528366
Reviewed-by: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
`writeComposite` can write and deduplicate constants, so it's preferable
to manually emitting an OpCompositeConstruct opcode.
Change-Id: I0c4ac8f8a456c8561c0b6a90cd316934f20895e8
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/528638
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
`writeComposite` can write and deduplicate constants, so it's preferable
to manually emitting an OpCompositeConstruct opcode.
Change-Id: Ie5c23af76822da762eadac8ff0ab0c6cc0febd31
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/528637
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Some GPUs (Adrenos in particular) perform noticeably better when we
use OpConstantComposite instead of OpCompositeConstruct. This also gives
us some deduplication of redundant ops.
Change-Id: I53b7a3e1cf61e51647a661a08ff4c7b53ee60f10
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/528636
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Change-Id: I484067cb1f6025dc9e6770c51c99bfc2c5925652
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/528365
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
This adopts a trick from SkVM to avoid sorting entirely.
Change-Id: I586c8a3613b48241842a7d8eba1c9d68a4717f83
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/528368
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Change-Id: I238d29ba0250224fa593845ae65192653f58faff
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/528156
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
Blocks did not previously track their position, creating problems
reporting some errors (which will be improved in followup CLs). Fixing
block positions changed the reporting of do loop errors, requiring do
loop position tracking to be updated as part of this change.
Change-Id: I3bd048a62d912914edf679f42607de1b5eafc2b9
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/528045
Reviewed-by: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
Caveat: on my machine, Nanobench doesn't detect any change (pro or con)
on this CL.
I'm working under the assumption that function calls have a non-zero
cost--they may be inlined (bloating code size), or not (incurring the
costs of a function call, register push/popping, etc). This CL avoids
making six calls to $blend_set_color_saturation by using two half3
variables. These half3s are used to swizzle the result--they contain two
zeros and a one, so multiplying them by a scalar will put the result in
the desired component. I've also made some very minor simplifications to
the math that were made possible by reordering.
Change-Id: I0c1ef88d165365376078846324be8bb723548512
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/528043
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
A ternary of the form `anything ? value : value` can be reduced to a
comma-expression of the form `anything, value`. This seems like a rare
case in real code, but it's easy enough to detect with our existing
toolbox.
The `anything` test-expression will be eliminated from the expression
if it has no side effects, using our existing constant-folding rules
for the comma expression.
Change-Id: I1285b04cd6a08f1bed614aa1aa6f37ea2447de91
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/528439
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Previously, when we vectorized scalars, we would not place them in the
constant buffer, so we could emit simple vectors like (0,0,0) or (1,1,1)
more than once. Now, we use `writeConstructorSplat` to vectorize, which
knows how to write constants.
Change-Id: Ic97c0ce5415fd46ff8c7fb7dac9205844633ef3a
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/527921
Reviewed-by: Arman Uguray <armansito@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Change-Id: I76a01cf18583fab619459f258119b780ff978be5
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/527840
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
Today I learned that `mix(a, b, 1)` can reduce precision. Ternaries do
not suffer from this problem.
Change-Id: I58814d00193ccbff53960030d163d31c49234f6c
Bug: skia:9320
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/528161
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
The inliner can do a better job with functions that only have a single
return by eliding a temp variable. In this case, it was simple to adapt.
Change-Id: I9a5ee26cf546db1b2647cdf95d4cdba6649ea19b
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/528160
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
SkSL errors now identify the specific range of code they are describing,
rather than just the line number.
Change-Id: Ifabb3148476f9b4cd8e532f23e5b38e1cf33a87e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/528039
Reviewed-by: John Stiles <johnstiles@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
While I was fixing up Chrome's uses, I found some failures
there that I did not see in Skia, and tracked them down
to a few other places where we include SkColorSpace
and it is not strictly necessary
- SkCustomMesh.h
- GrColorInfo.h
- GrColorSpaceXform.h
- SkColorSpaceXformSteps.h
For these files (and their .cpp files), I added enforcement
of include-what-you-use, and then fixed the myriad of places
which were depending on these transitive includes.
One change to help Chrome is the manual overloads of
SkImage::MakeFromAdoptedTexture instead of using default
parameters. This makes it so callers of that function
do not need to include SkColorSpace if they were going
to pass nullptr for it anyway.
Bug: skia:13052
Change-Id: I16bf8ed5e258225d887f562f2c189623b1ca9c23
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/527056
Reviewed-by: Robert Phillips <robertphillips@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Kevin Lubick <kjlubick@google.com>
This means that the UniformManager w/in the SkPipelineDataGatherer will
now collect all the uniforms into a single block of memory.
Bug: skia:12701
Change-Id: I504a014d37662619191d9b519b4e1add69eac8bb
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/527837
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
This removes the use of the dubious void* 'srcs' array.
Bug: skia:12701
Change-Id: I5078d48c119d4e84e83a78b10d0bd4a9a1d8cd8c
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/527777
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
This reverts commit 2e6f60f423.
Reason for revert: draws black incorrectly in various iPhone 8 tests
Original change's description:
> Fix color fringes on blend_hue and blend_saturation.
>
> Previously, we checked for division against zero, but didn't do anything
> to prevent division against extraordinarily small values. Now, we only
> saturate if the delta between max and min is greater than 0.00001.
>
> Change-Id: I7d1df3430941c7e1a7f94e597d5449f9259612d6
> Bug: skia:9320
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/527498
> Auto-Submit: John Stiles <johnstiles@google.com>
> Reviewed-by: Greg Daniel <egdaniel@google.com>
> Commit-Queue: Greg Daniel <egdaniel@google.com>
Bug: skia:9320
Change-Id: Id83376080eed684577b3592c5e1bee3c80fc3fc9
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/528038
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Derek Sollenberger <djsollen@google.com>
Commit-Queue: Derek Sollenberger <djsollen@google.com>
This addresses (hopefully) all of the remaining suboptimal positions in
SkSL error reporting.
Change-Id: I5bc977b03d51153b841a89fa687e54e3e9cb6ec3
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/527976
Reviewed-by: Brian Osman <brianosman@google.com>
Reviewed-by: John Stiles <johnstiles@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
This cleans up a lot of positions produced by DSLParser to make them
actually match the ranges of the elements being parsed.
Change-Id: Ic3a9d62c99c4b5f92b84a597a2ceba386bbcc334
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/527501
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
This is moving to the world where the SkPipelineDataGatherer holds
a UniformManager. In that world the UniformManager will need to
incrementally allocate the uniforms it is collecting.
Bug: skia:12701
Change-Id: I6ed26948d7d0f2979130c4908d0c34c32604cd75
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/527736
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
With UniformData being stored in a arena and TextureData still being
held by unique pointer, the PipelineDataCache needs to be able to handle
both.
Longer term, TextureData will also be held in an arena and this
split will go away.
Bug: skia:12701
Change-Id: Iab6c6542fbce4f886410f985e6c93ddaa125152e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/527504
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
We already performed a matching simplification for `0 - x`, so this
seemed like a straightforward improvement.
Performing this simplification causes the expressions in the test code
to match on both sides (e.g. `-one == -one`) which allows them to fold
away.
Change-Id: Idf87a98024dd6831b45d0384285ead2e2e039493
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/527656
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
