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// Copyright (c) 2020 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "source/fuzz/transformation_replace_irrelevant_id.h"
#include "gtest/gtest.h"
#include "source/fuzz/fuzzer_util.h"
#include "source/fuzz/id_use_descriptor.h"
#include "source/fuzz/instruction_descriptor.h"
#include "test/fuzz/fuzz_test_util.h"
namespace spvtools {
namespace fuzz {
namespace {
const std::string shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %2 "main"
OpExecutionMode %2 OriginUpperLeft
OpSource ESSL 310
OpName %2 "main"
OpName %3 "a"
OpName %4 "b"
%5 = OpTypeVoid
%6 = OpTypeFunction %5
%7 = OpTypeBool
%8 = OpConstantTrue %7
%9 = OpTypeInt 32 1
%10 = OpTypePointer Function %9
%11 = OpConstant %9 2
%12 = OpTypeStruct %9
%13 = OpTypeInt 32 0
%14 = OpConstant %13 3
%15 = OpTypeArray %12 %14
%16 = OpTypePointer Function %15
%17 = OpConstant %9 0
%2 = OpFunction %5 None %6
%18 = OpLabel
%3 = OpVariable %10 Function
%4 = OpVariable %10 Function
%19 = OpVariable %16 Function
OpStore %3 %11
%20 = OpLoad %9 %3
%21 = OpAccessChain %10 %19 %20 %17
%22 = OpLoad %9 %21
OpStore %4 %22
%23 = OpLoad %9 %4
%24 = OpIAdd %9 %20 %23
%25 = OpISub %9 %23 %20
OpReturn
OpFunctionEnd
)";
void SetUpIrrelevantIdFacts(FactManager* fact_manager) {
fact_manager->AddFactIdIsIrrelevant(17);
fact_manager->AddFactIdIsIrrelevant(23);
fact_manager->AddFactIdIsIrrelevant(24);
fact_manager->AddFactIdIsIrrelevant(25);
}
TEST(TransformationReplaceIrrelevantIdTest, Inapplicable) {
const auto env = SPV_ENV_UNIVERSAL_1_5;
const auto consumer = nullptr;
const auto context = BuildModule(env, consumer, shader, kFuzzAssembleOption);
spvtools::ValidatorOptions validator_options;
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
TransformationContext transformation_context(
MakeUnique<FactManager>(context.get()), validator_options);
SetUpIrrelevantIdFacts(transformation_context.GetFactManager());
auto instruction_21_descriptor =
MakeInstructionDescriptor(21, spv::Op::OpAccessChain, 0);
auto instruction_24_descriptor =
MakeInstructionDescriptor(24, spv::Op::OpIAdd, 0);
// %20 has not been declared as irrelevant.
ASSERT_FALSE(TransformationReplaceIrrelevantId(
MakeIdUseDescriptor(20, instruction_24_descriptor, 0), 23)
.IsApplicable(context.get(), transformation_context));
// %22 is not used in %24.
ASSERT_FALSE(TransformationReplaceIrrelevantId(
MakeIdUseDescriptor(22, instruction_24_descriptor, 1), 20)
.IsApplicable(context.get(), transformation_context));
// Replacement id %50 does not exist.
ASSERT_FALSE(TransformationReplaceIrrelevantId(
MakeIdUseDescriptor(23, instruction_24_descriptor, 1), 50)
.IsApplicable(context.get(), transformation_context));
// %25 is not available to use at %24.
ASSERT_FALSE(TransformationReplaceIrrelevantId(
MakeIdUseDescriptor(23, instruction_24_descriptor, 1), 25)
.IsApplicable(context.get(), transformation_context));
// %24 is not available to use at %24.
ASSERT_FALSE(TransformationReplaceIrrelevantId(
MakeIdUseDescriptor(23, instruction_24_descriptor, 1), 24)
.IsApplicable(context.get(), transformation_context));
// %8 has not the same type as %23.
ASSERT_FALSE(TransformationReplaceIrrelevantId(
MakeIdUseDescriptor(23, instruction_24_descriptor, 1), 8)
.IsApplicable(context.get(), transformation_context));
// %17 is an index to a struct in an access chain, so it can't be replaced.
ASSERT_FALSE(TransformationReplaceIrrelevantId(
MakeIdUseDescriptor(17, instruction_21_descriptor, 2), 20)
.IsApplicable(context.get(), transformation_context));
}
TEST(TransformationReplaceIrrelevantIdTest, Apply) {
const auto env = SPV_ENV_UNIVERSAL_1_5;
const auto consumer = nullptr;
const auto context = BuildModule(env, consumer, shader, kFuzzAssembleOption);
spvtools::ValidatorOptions validator_options;
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
TransformationContext transformation_context(
MakeUnique<FactManager>(context.get()), validator_options);
SetUpIrrelevantIdFacts(transformation_context.GetFactManager());
auto instruction_24_descriptor =
MakeInstructionDescriptor(24, spv::Op::OpIAdd, 0);
// Replace the use of %23 in %24 with %22.
auto transformation = TransformationReplaceIrrelevantId(
MakeIdUseDescriptor(23, instruction_24_descriptor, 1), 22);
ASSERT_TRUE(
transformation.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation, context.get(), &transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
std::string after_transformation = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %2 "main"
OpExecutionMode %2 OriginUpperLeft
OpSource ESSL 310
OpName %2 "main"
OpName %3 "a"
OpName %4 "b"
%5 = OpTypeVoid
%6 = OpTypeFunction %5
%7 = OpTypeBool
%8 = OpConstantTrue %7
%9 = OpTypeInt 32 1
%10 = OpTypePointer Function %9
%11 = OpConstant %9 2
%12 = OpTypeStruct %9
%13 = OpTypeInt 32 0
%14 = OpConstant %13 3
%15 = OpTypeArray %12 %14
%16 = OpTypePointer Function %15
%17 = OpConstant %9 0
%2 = OpFunction %5 None %6
%18 = OpLabel
%3 = OpVariable %10 Function
%4 = OpVariable %10 Function
%19 = OpVariable %16 Function
OpStore %3 %11
%20 = OpLoad %9 %3
%21 = OpAccessChain %10 %19 %20 %17
%22 = OpLoad %9 %21
OpStore %4 %22
%23 = OpLoad %9 %4
%24 = OpIAdd %9 %20 %22
%25 = OpISub %9 %23 %20
OpReturn
OpFunctionEnd
)";
ASSERT_TRUE(IsEqual(env, after_transformation, context.get()));
}
TEST(TransformationReplaceIrrelevantIdTest,
DoNotReplaceVariableInitializerWithNonConstant) {
// Checks that it is not possible to replace the initializer of a variable
// with a non-constant id (such as a function parameter).
const std::string reference_shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 320
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeInt 32 1
%7 = OpTypePointer Function %6
%8 = OpTypeFunction %2 %6
%13 = OpConstant %6 2
%4 = OpFunction %2 None %3
%5 = OpLabel
OpReturn
OpFunctionEnd
%10 = OpFunction %2 None %8
%9 = OpFunctionParameter %6
%11 = OpLabel
%12 = OpVariable %7 Function %13
OpReturn
OpFunctionEnd
)";
const auto env = SPV_ENV_UNIVERSAL_1_5;
const auto consumer = nullptr;
const auto context =
BuildModule(env, consumer, reference_shader, kFuzzAssembleOption);
spvtools::ValidatorOptions validator_options;
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
TransformationContext transformation_context(
MakeUnique<FactManager>(context.get()), validator_options);
transformation_context.GetFactManager()->AddFactIdIsIrrelevant(13);
// We cannot replace the use of %13 in the initializer of %12 with %9 because
// %9 is not a constant.
ASSERT_FALSE(
TransformationReplaceIrrelevantId(
MakeIdUseDescriptor(
13, MakeInstructionDescriptor(12, spv::Op::OpVariable, 0), 1),
9)
.IsApplicable(context.get(), transformation_context));
}
TEST(TransformationReplaceIrrelevantIdTest,
DoNotReplaceIrrelevantIdWithOpFunction) {
// Checks that an OpFunction result id is not allowed to be used to replace an
// irrelevant id.
const std::string reference_shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 320
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeInt 32 1
%7 = OpTypeFunction %6
%13 = OpConstant %6 2
%4 = OpFunction %2 None %3
%5 = OpLabel
%20 = OpCopyObject %6 %13
%21 = OpCopyObject %6 %20
OpReturn
OpFunctionEnd
%10 = OpFunction %6 None %7
%11 = OpLabel
OpReturnValue %13
OpFunctionEnd
)";
const auto env = SPV_ENV_UNIVERSAL_1_5;
const auto consumer = nullptr;
const auto context =
BuildModule(env, consumer, reference_shader, kFuzzAssembleOption);
spvtools::ValidatorOptions validator_options;
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
TransformationContext transformation_context(
MakeUnique<FactManager>(context.get()), validator_options);
transformation_context.GetFactManager()->AddFactIdIsIrrelevant(20);
// We cannot replace the use of %20 in by %21 with %10 because %10 is an
// OpFunction instruction.
ASSERT_FALSE(
TransformationReplaceIrrelevantId(
MakeIdUseDescriptor(
20, MakeInstructionDescriptor(21, spv::Op::OpCopyObject, 0), 0),
10)
.IsApplicable(context.get(), transformation_context));
}
TEST(TransformationReplaceIrrelevantIdTest, OpAccessChainIrrelevantIndex) {
// Checks that we can't replace irrelevant index operands in OpAccessChain.
const std::string reference_shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 320
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeInt 32 1
%7 = OpTypeVector %6 2
%8 = OpTypePointer Function %7
%10 = OpConstant %6 0
%11 = OpConstant %6 2
%13 = OpTypePointer Function %6
%4 = OpFunction %2 None %3
%5 = OpLabel
%9 = OpVariable %8 Function
%12 = OpAccessChain %13 %9 %10
OpReturn
OpFunctionEnd
)";
const auto env = SPV_ENV_UNIVERSAL_1_5;
const auto consumer = nullptr;
const auto context =
BuildModule(env, consumer, reference_shader, kFuzzAssembleOption);
spvtools::ValidatorOptions validator_options;
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
TransformationContext transformation_context(
MakeUnique<FactManager>(context.get()), validator_options);
transformation_context.GetFactManager()->AddFactIdIsIrrelevant(10);
// We cannot replace the use of %10 in %12 with %11 because %10 is an
// irrelevant id.
ASSERT_FALSE(
TransformationReplaceIrrelevantId(
MakeIdUseDescriptor(
10, MakeInstructionDescriptor(12, spv::Op::OpAccessChain, 0), 1),
11)
.IsApplicable(context.get(), transformation_context));
}
} // namespace
} // namespace fuzz
} // namespace spvtools