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skia2/tests/SkSLTest.cpp
John Stiles f89a8122a4 Fix flaws in minus-prefix optimization. 
We had a logic bug when attempting to optimize the following code:
    const vecN x = vecN(a, b, c);
    -x;

The goal was to replace `-x` with `vecN(-a, -b, -c)` but we accidentally
tried to cast the `x` VariableReference to a Constructor. We
unfortunately didn't cover this in any of our test cases, but the fuzzer
managed to synthesize it by mixing and matching elements from its new
corpus.

This affected several different constructor types: splat, diagonal-
matrix, compound and array.

Change-Id: I10dd2460ab26ba3e820b0cff5db091368fb7e648
Bug: oss-fuzz:37764, oss-fuzz:37861
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/443407
Commit-Queue: John Stiles <johnstiles@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
2021-08-30 20:40:17 +00:00

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/*
* Copyright 2021 Google LLC
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm/gm.h"
#include "include/core/SkBitmap.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkData.h"
#include "include/core/SkFont.h"
#include "include/core/SkPaint.h"
#include "include/core/SkSize.h"
#include "include/core/SkString.h"
#include "include/core/SkSurface.h"
#include "include/effects/SkGradientShader.h"
#include "include/effects/SkImageFilters.h"
#include "include/effects/SkRuntimeEffect.h"
#include "include/private/SkSLDefines.h" // for kDefaultInlineThreshold
#include "include/utils/SkRandom.h"
#include "src/core/SkRuntimeEffectPriv.h"
#include "src/gpu/GrCaps.h"
#include "src/gpu/GrDirectContextPriv.h"
#include "tests/Test.h"
#include "tools/Resources.h"
#include "tools/ToolUtils.h"
static const SkRect kRect = SkRect::MakeWH(1, 1);
template <typename T>
static void set_uniform(SkRuntimeShaderBuilder* builder, const char* name, const T& value) {
SkRuntimeShaderBuilder::BuilderUniform uniform = builder->uniform(name);
if (uniform.fVar) {
uniform = value;
}
}
static void test_one_permutation(skiatest::Reporter* r,
SkSurface* surface,
const char* testFile,
const char* permutationSuffix,
const SkRuntimeEffect::Options& options) {
SkString resourcePath = SkStringPrintf("sksl/%s", testFile);
sk_sp<SkData> shaderData = GetResourceAsData(resourcePath.c_str());
if (!shaderData) {
ERRORF(r, "%s%s: Unable to load file", testFile, permutationSuffix);
return;
}
SkString shaderString{reinterpret_cast<const char*>(shaderData->bytes()), shaderData->size()};
SkRuntimeEffect::Result result = SkRuntimeEffect::MakeForShader(shaderString, options);
if (!result.effect) {
ERRORF(r, "%s%s: %s", testFile, permutationSuffix, result.errorText.c_str());
return;
}
SkRuntimeShaderBuilder builder(result.effect);
set_uniform(&builder, "colorBlack", SkV4{0, 0, 0, 1});
set_uniform(&builder, "colorRed", SkV4{1, 0, 0, 1});
set_uniform(&builder, "colorGreen", SkV4{0, 1, 0, 1});
set_uniform(&builder, "colorBlue", SkV4{0, 0, 1, 1});
set_uniform(&builder, "colorWhite", SkV4{1, 1, 1, 1});
set_uniform(&builder, "testInputs", SkV4{-1.25, 0, 0.75, 2.25});
set_uniform(&builder, "testMatrix2x2", std::array<float,4>{1, 2,
3, 4});
set_uniform(&builder, "testMatrix3x3", std::array<float,9>{1, 2, 3,
4, 5, 6,
7, 8, 9});
set_uniform(&builder, "unknownInput", 1.0f);
set_uniform(&builder, "testMatrix2x2", std::array<float,4>{1, 2,
3, 4});
set_uniform(&builder, "testMatrix3x3", std::array<float,9>{1, 2, 3,
4, 5, 6,
7, 8, 9});
sk_sp<SkShader> shader = builder.makeShader(/*localMatrix=*/nullptr, /*isOpaque=*/true);
if (!shader) {
ERRORF(r, "%s%s: Unable to build shader", testFile, permutationSuffix);
return;
}
SkPaint paintShader;
paintShader.setShader(shader);
surface->getCanvas()->drawRect(kRect, paintShader);
SkBitmap bitmap;
REPORTER_ASSERT(r, bitmap.tryAllocPixels(surface->imageInfo()));
REPORTER_ASSERT(r, surface->readPixels(bitmap.info(), bitmap.getPixels(), bitmap.rowBytes(),
/*srcX=*/0, /*srcY=*/0));
SkColor color = bitmap.getColor(0, 0);
REPORTER_ASSERT(r, color == SkColorSetARGB(0xFF, 0x00, 0xFF, 0x00),
"Expected: solid green. Actual: A=%02X R=%02X G=%02X B=%02X.",
SkColorGetA(color), SkColorGetR(color), SkColorGetG(color), SkColorGetB(color));
}
static void test_permutations(skiatest::Reporter* r,
SkSurface* surface,
const char* testFile,
bool worksInES2) {
SkRuntimeEffect::Options options =
worksInES2 ? SkRuntimeEffect::Options{} : SkRuntimeEffectPriv::ES3Options();
options.forceNoInline = false;
test_one_permutation(r, surface, testFile, "", options);
options.forceNoInline = true;
test_one_permutation(r, surface, testFile, " (NoInline)", options);
}
static void test_cpu(skiatest::Reporter* r, const char* testFile) {
const SkImageInfo info = SkImageInfo::MakeN32Premul(kRect.width(), kRect.height());
sk_sp<SkSurface> surface(SkSurface::MakeRaster(info));
test_permutations(r, surface.get(), testFile, /*worksInES2=*/true);
}
static void test_gpu(skiatest::Reporter* r, GrDirectContext* ctx, const char* testFile) {
const SkImageInfo info = SkImageInfo::MakeN32Premul(kRect.width(), kRect.height());
sk_sp<SkSurface> surface(SkSurface::MakeRenderTarget(ctx, SkBudgeted::kNo, info));
test_permutations(r, surface.get(), testFile, /*worksInES2=*/true);
}
static void test_es3(skiatest::Reporter* r, GrDirectContext* ctx, const char* testFile) {
if (!ctx->priv().caps()->shaderCaps()->supportsSkSLES3()) {
return;
}
// ES3-only tests never run on the CPU, because SkVM lacks support for many non-ES2 features.
const SkImageInfo info = SkImageInfo::MakeN32Premul(kRect.width(), kRect.height());
sk_sp<SkSurface> surface(SkSurface::MakeRenderTarget(ctx, SkBudgeted::kNo, info));
test_permutations(r, surface.get(), testFile, /*worksInES2=*/false);
}
#define SKSL_TEST_CPU(name, path) \
DEF_TEST(name ## _CPU, r) { \
test_cpu(r, path); \
}
#define SKSL_TEST_GPU(name, path) \
DEF_GPUTEST_FOR_RENDERING_CONTEXTS(name ## _GPU, r, ctxInfo) { \
test_gpu(r, ctxInfo.directContext(), path); \
}
#define SKSL_TEST_ES3(name, path) \
DEF_GPUTEST_FOR_RENDERING_CONTEXTS(name ## _GPU, r, ctxInfo) { \
test_es3(r, ctxInfo.directContext(), path); \
}
#define SKSL_TEST(name, path) SKSL_TEST_CPU(name, path) SKSL_TEST_GPU(name, path)
SKSL_TEST(SkSLAssignmentOps, "folding/AssignmentOps.sksl")
SKSL_TEST(SkSLBoolFolding, "folding/BoolFolding.sksl")
SKSL_TEST(SkSLCastFolding, "folding/CastFolding.sksl")
SKSL_TEST(SkSLIntFoldingES2, "folding/IntFoldingES2.sksl")
SKSL_TEST_ES3(SkSLIntFoldingES3, "folding/IntFoldingES3.sksl")
SKSL_TEST(SkSLFloatFolding, "folding/FloatFolding.sksl")
// skbug.com/11919: Fails on Nexus5/7, and Intel GPUs
SKSL_TEST_CPU(SkSLMatrixFoldingES2, "folding/MatrixFoldingES2.sksl")
SKSL_TEST(SkSLSelfAssignment, "folding/SelfAssignment.sksl")
SKSL_TEST(SkSLShortCircuitBoolFolding, "folding/ShortCircuitBoolFolding.sksl")
SKSL_TEST(SkSLSwizzleFolding, "folding/SwizzleFolding.sksl")
SKSL_TEST(SkSLVectorScalarFolding, "folding/VectorScalarFolding.sksl")
SKSL_TEST(SkSLVectorVectorFolding, "folding/VectorVectorFolding.sksl")
SKSL_TEST_ES3(SkSLDoWhileBodyMustBeInlinedIntoAScope,
"inliner/DoWhileBodyMustBeInlinedIntoAScope.sksl")
SKSL_TEST_ES3(SkSLDoWhileTestCannotBeInlined, "inliner/DoWhileTestCannotBeInlined.sksl")
SKSL_TEST(SkSLForBodyMustBeInlinedIntoAScope, "inliner/ForBodyMustBeInlinedIntoAScope.sksl")
SKSL_TEST_ES3(SkSLForInitializerExpressionsCanBeInlined,
"inliner/ForInitializerExpressionsCanBeInlined.sksl")
SKSL_TEST(SkSLForWithoutReturnInsideCanBeInlined, "inliner/ForWithoutReturnInsideCanBeInlined.sksl")
SKSL_TEST(SkSLForWithReturnInsideCannotBeInlined, "inliner/ForWithReturnInsideCannotBeInlined.sksl")
SKSL_TEST(SkSLIfBodyMustBeInlinedIntoAScope, "inliner/IfBodyMustBeInlinedIntoAScope.sksl")
SKSL_TEST(SkSLIfElseBodyMustBeInlinedIntoAScope, "inliner/IfElseBodyMustBeInlinedIntoAScope.sksl")
SKSL_TEST(SkSLIfElseChainWithReturnsCanBeInlined, "inliner/IfElseChainWithReturnsCanBeInlined.sksl")
SKSL_TEST(SkSLIfTestCanBeInlined, "inliner/IfTestCanBeInlined.sksl")
SKSL_TEST(SkSLIfWithReturnsCanBeInlined, "inliner/IfWithReturnsCanBeInlined.sksl")
SKSL_TEST(SkSLInlineKeywordOverridesThreshold, "inliner/InlineKeywordOverridesThreshold.sksl")
SKSL_TEST(SkSLInlinerAvoidsVariableNameOverlap, "inliner/InlinerAvoidsVariableNameOverlap.sksl")
SKSL_TEST(SkSLInlinerElidesTempVarForReturnsInsideBlock,
"inliner/InlinerElidesTempVarForReturnsInsideBlock.sksl")
SKSL_TEST(SkSLInlinerUsesTempVarForMultipleReturns,
"inliner/InlinerUsesTempVarForMultipleReturns.sksl")
SKSL_TEST(SkSLInlinerUsesTempVarForReturnsInsideBlockWithVar,
"inliner/InlinerUsesTempVarForReturnsInsideBlockWithVar.sksl")
SKSL_TEST(SkSLInlineThreshold, "inliner/InlineThreshold.sksl")
// skbug.com/11919: Fails on Adreno + Vulkan
SKSL_TEST_CPU(SkSLInlineWithInoutArgument, "inliner/InlineWithInoutArgument.sksl")
SKSL_TEST(SkSLInlineWithModifiedArgument, "inliner/InlineWithModifiedArgument.sksl")
SKSL_TEST(SkSLInlineWithNestedBigCalls, "inliner/InlineWithNestedBigCalls.sksl")
SKSL_TEST(SkSLInlineWithUnmodifiedArgument, "inliner/InlineWithUnmodifiedArgument.sksl")
SKSL_TEST(SkSLInlineWithUnnecessaryBlocks, "inliner/InlineWithUnnecessaryBlocks.sksl")
SKSL_TEST(SkSLNoInline, "inliner/NoInline.sksl")
SKSL_TEST(SkSLShortCircuitEvaluationsCannotInlineRightHandSide,
"inliner/ShortCircuitEvaluationsCannotInlineRightHandSide.sksl")
SKSL_TEST_ES3(SkSLStaticSwitchInline, "inliner/StaticSwitch.sksl")
SKSL_TEST(SkSLStructsCanBeInlinedSafely, "inliner/StructsCanBeInlinedSafely.sksl")
SKSL_TEST(SkSLSwizzleCanBeInlinedDirectly, "inliner/SwizzleCanBeInlinedDirectly.sksl")
SKSL_TEST(SkSLTernaryResultsCannotBeInlined, "inliner/TernaryResultsCannotBeInlined.sksl")
SKSL_TEST(SkSLTernaryTestCanBeInlined, "inliner/TernaryTestCanBeInlined.sksl")
SKSL_TEST(SkSLTrivialArgumentsInlineDirectly, "inliner/TrivialArgumentsInlineDirectly.sksl")
SKSL_TEST_ES3(SkSLWhileBodyMustBeInlinedIntoAScope,
"inliner/WhileBodyMustBeInlinedIntoAScope.sksl")
SKSL_TEST_ES3(SkSLWhileTestCannotBeInlined, "inliner/WhileTestCannotBeInlined.sksl")
// TODO(skia:11052): SPIR-V does not yet honor `out` param semantics correctly
SKSL_TEST_CPU(SkSLInlinerHonorsGLSLOutParamSemantics,
"inliner/InlinerHonorsGLSLOutParamSemantics.sksl")
SKSL_TEST(SkSLIntrinsicAbsFloat, "intrinsics/AbsFloat.sksl")
SKSL_TEST(SkSLIntrinsicCeil, "intrinsics/Ceil.sksl")
SKSL_TEST_ES3(SkSLIntrinsicDeterminant, "intrinsics/Determinant.sksl")
SKSL_TEST_ES3(SkSLIntrinsicDFdx, "intrinsics/DFdx.sksl")
SKSL_TEST_ES3(SkSLIntrinsicDFdy, "intrinsics/DFdy.sksl")
SKSL_TEST_ES3(SkSLIntrinsicFloatBitsToInt, "intrinsics/FloatBitsToInt.sksl")
SKSL_TEST_ES3(SkSLIntrinsicFloatBitsToUint, "intrinsics/FloatBitsToUint.sksl")
SKSL_TEST_ES3(SkSLIntrinsicIntBitsToFloat, "intrinsics/IntBitsToFloat.sksl")
SKSL_TEST_ES3(SkSLIntrinsicIsInf, "intrinsics/IsInf.sksl")
// TODO(johnstiles): test broken on Adreno 6xx + Vulkan
//SKSL_TEST(SkSLIntrinsicClampFloat, "intrinsics/ClampFloat.sksl")
SKSL_TEST(SkSLIntrinsicMaxFloat, "intrinsics/MaxFloat.sksl")
SKSL_TEST(SkSLIntrinsicMinFloat, "intrinsics/MinFloat.sksl")
// skbug.com/11919: Fails on Adreno + Vulkan
SKSL_TEST_CPU(SkSLIntrinsicMixFloat, "intrinsics/MixFloat.sksl")
SKSL_TEST_ES3(SkSLIntrinsicRound, "intrinsics/Round.sksl")
SKSL_TEST_ES3(SkSLIntrinsicRoundEven, "intrinsics/RoundEven.sksl")
SKSL_TEST(SkSLIntrinsicSignFloat, "intrinsics/SignFloat.sksl")
SKSL_TEST(SkSLIntrinsicStep, "intrinsics/Step.sksl")
SKSL_TEST_ES3(SkSLIntrinsicTrunc, "intrinsics/Trunc.sksl")
SKSL_TEST_ES3(SkSLIntrinsicTranspose, "intrinsics/Transpose.sksl")
SKSL_TEST_ES3(SkSLIntrinsicUintBitsToFloat, "intrinsics/UintBitsToFloat.sksl")
SKSL_TEST_ES3(SkSLArrayNarrowingConversions, "runtime/ArrayNarrowingConversions.rts")
SKSL_TEST_ES3(SkSLArrayComparison, "shared/ArrayComparison.sksl")
SKSL_TEST_ES3(SkSLArrayConstructors, "shared/ArrayConstructors.sksl")
SKSL_TEST_ES3(SkSLArrayCast, "shared/ArrayCast.sksl")
SKSL_TEST_ES3(SkSLArrayFollowedByScalar, "shared/ArrayFollowedByScalar.sksl")
SKSL_TEST(SkSLArrayTypes, "shared/ArrayTypes.sksl")
SKSL_TEST(SkSLAssignment, "shared/Assignment.sksl")
SKSL_TEST(SkSLCastsRoundTowardZero, "shared/CastsRoundTowardZero.sksl")
SKSL_TEST(SkSLCommaMixedTypes, "shared/CommaMixedTypes.sksl")
// This test causes the Adreno 330 driver to crash, and does not pass on Quadro P400 in wasm.
// The CPU test confirms that we can get it right, even if not all drivers do.
SKSL_TEST_CPU(SkSLCommaSideEffects, "shared/CommaSideEffects.sksl")
SKSL_TEST(SkSLConstantIf, "shared/ConstantIf.sksl")
SKSL_TEST_ES3(SkSLConstArray, "shared/ConstArray.sksl")
SKSL_TEST(SkSLConstVariableComparison, "shared/ConstVariableComparison.sksl")
SKSL_TEST(SkSLDeadIfStatement, "shared/DeadIfStatement.sksl")
SKSL_TEST(SkSLDeadReturn, "shared/DeadReturn.sksl")
// TODO(skia:12012): some Radeons crash when compiling this code; disable them
//SKSL_TEST_ES3(SkSLDeadReturnES3, "shared/DeadReturnES3.sksl")
SKSL_TEST(SkSLDeadStripFunctions, "shared/DeadStripFunctions.sksl")
SKSL_TEST(SkSLDependentInitializers, "shared/DependentInitializers.sksl")
SKSL_TEST_ES3(SkSLDoWhileControlFlow, "shared/DoWhileControlFlow.sksl")
SKSL_TEST(SkSLEmptyBlocksES2, "shared/EmptyBlocksES2.sksl")
SKSL_TEST(SkSLForLoopControlFlow, "shared/ForLoopControlFlow.sksl")
SKSL_TEST(SkSLFunctionArgTypeMatch, "shared/FunctionArgTypeMatch.sksl")
SKSL_TEST(SkSLFunctionReturnTypeMatch, "shared/FunctionReturnTypeMatch.sksl")
SKSL_TEST(SkSLFunctions, "shared/Functions.sksl")
SKSL_TEST(SkSLFunctionPrototype, "shared/FunctionPrototype.sksl")
SKSL_TEST(SkSLGeometricIntrinsics, "shared/GeometricIntrinsics.sksl")
SKSL_TEST(SkSLHelloWorld, "shared/HelloWorld.sksl")
SKSL_TEST(SkSLHex, "shared/Hex.sksl")
SKSL_TEST(SkSLMatrices, "shared/Matrices.sksl")
SKSL_TEST_ES3(SkSLMatricesNonsquare, "shared/MatricesNonsquare.sksl")
SKSL_TEST(SkSLMatrixEquality, "shared/MatrixEquality.sksl")
SKSL_TEST(SkSLMatrixScalarSplat, "shared/MatrixScalarSplat.sksl")
SKSL_TEST(SkSLMatrixToVectorCast, "shared/MatrixToVectorCast.sksl")
SKSL_TEST(SkSLMultipleAssignments, "shared/MultipleAssignments.sksl")
SKSL_TEST(SkSLNegation, "shared/Negation.sksl")
SKSL_TEST(SkSLNumberCasts, "shared/NumberCasts.sksl")
SKSL_TEST(SkSLOperatorsES2, "shared/OperatorsES2.sksl")
SKSL_TEST_ES3(SkSLOperatorsES3, "shared/OperatorsES3.sksl")
SKSL_TEST(SkSLOssfuzz36852, "shared/Ossfuzz36852.sksl")
// skbug.com/11919: Fails on Adreno + Vulkan
SKSL_TEST_CPU(SkSLOutParams, "shared/OutParams.sksl")
SKSL_TEST_CPU(SkSLOutParamsNoInline, "shared/OutParamsNoInline.sksl")
SKSL_TEST_CPU(SkSLOutParamsTricky, "shared/OutParamsTricky.sksl")
SKSL_TEST(SkSLResizeMatrix, "shared/ResizeMatrix.sksl")
SKSL_TEST(SkSLReturnsValueOnEveryPathES2, "shared/ReturnsValueOnEveryPathES2.sksl")
SKSL_TEST(SkSLScalarConversionConstructorsES2, "shared/ScalarConversionConstructorsES2.sksl")
SKSL_TEST_ES3(SkSLScalarConversionConstructorsES3, "shared/ScalarConversionConstructorsES3.sksl")
SKSL_TEST(SkSLStackingVectorCasts, "shared/StackingVectorCasts.sksl")
SKSL_TEST(SkSLStaticIf, "shared/StaticIf.sksl")
SKSL_TEST_ES3(SkSLStaticSwitch, "shared/StaticSwitch.sksl")
SKSL_TEST(SkSLStructArrayFollowedByScalar, "shared/StructArrayFollowedByScalar.sksl")
SKSL_TEST(SkSLStructsInFunctions, "shared/StructsInFunctions.sksl")
SKSL_TEST(SkSLSwizzleBoolConstants, "shared/SwizzleBoolConstants.sksl")
SKSL_TEST(SkSLSwizzleByConstantIndex, "shared/SwizzleByConstantIndex.sksl")
SKSL_TEST(SkSLSwizzleConstants, "shared/SwizzleConstants.sksl")
SKSL_TEST(SkSLSwizzleLTRB, "shared/SwizzleLTRB.sksl")
SKSL_TEST(SkSLSwizzleOpt, "shared/SwizzleOpt.sksl")
SKSL_TEST(SkSLSwizzleScalar, "shared/SwizzleScalar.sksl")
SKSL_TEST(SkSLSwizzleScalarBool, "shared/SwizzleScalarBool.sksl")
SKSL_TEST(SkSLSwizzleScalarInt, "shared/SwizzleScalarInt.sksl")
SKSL_TEST(SkSLTernaryAsLValueEntirelyFoldable, "shared/TernaryAsLValueEntirelyFoldable.sksl")
SKSL_TEST(SkSLTernaryAsLValueFoldableTest, "shared/TernaryAsLValueFoldableTest.sksl")
SKSL_TEST(SkSLTernaryExpression, "shared/TernaryExpression.sksl")
SKSL_TEST(SkSLUnaryPositiveNegative, "shared/UnaryPositiveNegative.sksl")
SKSL_TEST(SkSLUnusedVariables, "shared/UnusedVariables.sksl")
SKSL_TEST(SkSLVectorConstructors, "shared/VectorConstructors.sksl")
SKSL_TEST(SkSLVectorToMatrixCast, "shared/VectorToMatrixCast.sksl")
// skbug.com/11919: Fails on Nexus5/7, and Intel GPUs
SKSL_TEST_CPU(SkSLVectorScalarMath, "shared/VectorScalarMath.sksl")
SKSL_TEST_ES3(SkSLWhileLoopControlFlow, "shared/WhileLoopControlFlow.sksl")
/*
TODO(skia:11209): enable these tests when Runtime Effects have support for ES3
SKSL_TEST(SkSLMatrixFoldingES3, "folding/MatrixFoldingES3.sksl")
SKSL_TEST(SkSLIntrinsicAbsInt, "intrinsics/AbsInt.sksl")
SKSL_TEST(SkSLIntrinsicClampInt, "intrinsics/ClampInt.sksl")
SKSL_TEST(SkSLIntrinsicMaxInt, "intrinsics/MaxInt.sksl")
SKSL_TEST(SkSLIntrinsicMinInt, "intrinsics/MinInt.sksl")
SKSL_TEST(SkSLIntrinsicMixBool, "intrinsics/MixBool.sksl")
SKSL_TEST(SkSLIntrinsicSignInt, "intrinsics/SignInt.sksl")
SKSL_TEST(SkSLDeadLoopVariable, "shared/DeadLoopVariable.sksl")
SKSL_TEST(SkSLEmptyBlocksES3, "shared/EmptyBlocksES3.sksl")
SKSL_TEST(SkSLHexUnsigned, "shared/HexUnsigned.sksl")
SKSL_TEST(SkSLResizeMatrixNonsquare, "shared/ResizeMatrixNonsquare.sksl")
SKSL_TEST(SkSLReturnsValueOnEveryPathES3, "shared/ReturnsValueOnEveryPathES3.sksl")
SKSL_TEST(SkSLSwizzleByIndex, "shared/SwizzleByIndex.sksl")
*/
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