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// Copyright (c) 2019 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_add_dead_block.h"
#include "gtest/gtest.h"
#include "source/fuzz/fuzzer_util.h"
#include "test/fuzz/fuzz_test_util.h"
namespace spvtools {
namespace fuzz {
namespace {
TEST(TransformationAddDeadBlockTest, BasicTest) {
std::string reference_shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %6 "main"
OpExecutionMode %6 OriginUpperLeft
; Types
%2 = OpTypeBool
%3 = OpTypeVoid
%4 = OpTypeFunction %3
; Constants
%5 = OpConstantTrue %2
; main function
%6 = OpFunction %3 None %4
%7 = OpLabel
OpSelectionMerge %11 None
OpBranchConditional %5 %8 %9
%8 = OpLabel
OpBranch %10
%9 = OpLabel
OpBranch %10
%10 = OpLabel
OpBranch %11
%11 = OpLabel
OpBranch %13
%12 = OpLabel
OpBranch %13
%13 = OpLabel
OpReturn
OpFunctionEnd
)";
const auto env = SPV_ENV_UNIVERSAL_1_4;
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);
// Id 4 is already in use
auto transformation = TransformationAddDeadBlock(4, 11, true);
ASSERT_FALSE(
transformation.IsApplicable(context.get(), transformation_context));
// Id 5 is not a block
transformation = TransformationAddDeadBlock(14, 5, true);
ASSERT_FALSE(
transformation.IsApplicable(context.get(), transformation_context));
// Tests existing block not dominating its successor block.
transformation = TransformationAddDeadBlock(14, 8, true);
ASSERT_FALSE(
transformation.IsApplicable(context.get(), transformation_context));
transformation = TransformationAddDeadBlock(14, 9, true);
ASSERT_FALSE(
transformation.IsApplicable(context.get(), transformation_context));
// Tests existing block being an unreachable block.
transformation = TransformationAddDeadBlock(14, 12, true);
ASSERT_FALSE(
transformation.IsApplicable(context.get(), transformation_context));
// Tests applicable case.
transformation = TransformationAddDeadBlock(14, 11, true);
ASSERT_TRUE(
transformation.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation, context.get(), &transformation_context);
ASSERT_TRUE(transformation_context.GetFactManager()->BlockIsDead(14));
std::string variant_shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %6 "main"
OpExecutionMode %6 OriginUpperLeft
; Types
%2 = OpTypeBool
%3 = OpTypeVoid
%4 = OpTypeFunction %3
; Constants
%5 = OpConstantTrue %2
; main function
%6 = OpFunction %3 None %4
%7 = OpLabel
OpSelectionMerge %11 None
OpBranchConditional %5 %8 %9
%8 = OpLabel
OpBranch %10
%9 = OpLabel
OpBranch %10
%10 = OpLabel
OpBranch %11
%11 = OpLabel
OpSelectionMerge %13 None
OpBranchConditional %5 %13 %14
%14 = OpLabel
OpBranch %13
%12 = OpLabel
OpBranch %13
%13 = OpLabel
OpReturn
OpFunctionEnd
)";
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(IsEqual(env, variant_shader, context.get()));
}
TEST(TransformationAddDeadBlockTest, ApplicableWithFalseCondition) {
std::string reference_shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %6 "main"
OpExecutionMode %6 OriginUpperLeft
; Types
%2 = OpTypeBool
%3 = OpTypeVoid
%4 = OpTypeFunction %3
; Constants
%5 = OpConstantFalse %2
; main function
%6 = OpFunction %3 None %4
%7 = OpLabel
OpSelectionMerge %11 None
OpBranchConditional %5 %8 %9
%8 = OpLabel
OpBranch %10
%9 = OpLabel
OpBranch %10
%10 = OpLabel
OpBranch %11
%11 = OpLabel
OpBranch %13
%12 = OpLabel
OpBranch %13
%13 = OpLabel
OpReturn
OpFunctionEnd
)";
const auto env = SPV_ENV_UNIVERSAL_1_4;
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);
auto transformation = TransformationAddDeadBlock(14, 11, false);
ASSERT_TRUE(
transformation.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation, context.get(), &transformation_context);
std::string variant_shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %6 "main"
OpExecutionMode %6 OriginUpperLeft
; Types
%2 = OpTypeBool
%3 = OpTypeVoid
%4 = OpTypeFunction %3
; Constants
%5 = OpConstantFalse %2
; main function
%6 = OpFunction %3 None %4
%7 = OpLabel
OpSelectionMerge %11 None
OpBranchConditional %5 %8 %9
%8 = OpLabel
OpBranch %10
%9 = OpLabel
OpBranch %10
%10 = OpLabel
OpBranch %11
%11 = OpLabel
OpSelectionMerge %13 None
OpBranchConditional %5 %14 %13
%14 = OpLabel
OpBranch %13
%12 = OpLabel
OpBranch %13
%13 = OpLabel
OpReturn
OpFunctionEnd
)";
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(IsEqual(env, variant_shader, context.get()));
}
TEST(TransformationAddDeadBlockTest, TargetBlockMustNotBeSelectionMerge) {
std::string shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 310
OpName %4 "main"
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeBool
%7 = OpConstantTrue %6
%4 = OpFunction %2 None %3
%5 = OpLabel
OpSelectionMerge %10 None
OpBranchConditional %7 %8 %9
%8 = OpLabel
OpBranch %10
%9 = OpLabel
OpBranch %10
%10 = OpLabel
OpReturn
OpFunctionEnd
)";
const auto env = SPV_ENV_UNIVERSAL_1_4;
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);
ASSERT_FALSE(TransformationAddDeadBlock(100, 9, true)
.IsApplicable(context.get(), transformation_context));
}
TEST(TransformationAddDeadBlockTest, TargetBlockMustNotBeLoopMergeOrContinue) {
std::string shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %6 "main"
OpExecutionMode %6 OriginUpperLeft
; Types
%2 = OpTypeBool
%3 = OpTypeVoid
%4 = OpTypeFunction %3
; Constants
%5 = OpConstantTrue %2
; main function
%6 = OpFunction %3 None %4
%7 = OpLabel
OpBranch %8
%8 = OpLabel
OpLoopMerge %12 %11 None
OpBranch %13
%13 = OpLabel
OpSelectionMerge %14 None
OpBranchConditional %5 %9 %10
%9 = OpLabel
OpBranch %11
%10 = OpLabel
OpBranch %12
%14 = OpLabel
OpUnreachable
%11 = OpLabel
OpBranch %8
%12 = OpLabel
OpReturn
OpFunctionEnd
)";
const auto env = SPV_ENV_UNIVERSAL_1_4;
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);
// Bad because 9's successor is the loop continue target.
ASSERT_FALSE(TransformationAddDeadBlock(100, 9, true)
.IsApplicable(context.get(), transformation_context));
// Bad because 10's successor is the loop merge.
ASSERT_FALSE(TransformationAddDeadBlock(100, 10, true)
.IsApplicable(context.get(), transformation_context));
}
TEST(TransformationAddDeadBlockTest, SourceBlockMustNotBeLoopHead) {
std::string shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 310
OpName %4 "main"
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeBool
%7 = OpConstantTrue %6
%4 = OpFunction %2 None %3
%5 = OpLabel
OpBranch %8
%8 = OpLabel
OpLoopMerge %11 %12 None
OpBranch %9
%9 = OpLabel
OpBranchConditional %7 %11 %12
%12 = OpLabel
OpBranch %8
%11 = OpLabel
OpReturn
OpFunctionEnd
)";
const auto env = SPV_ENV_UNIVERSAL_1_4;
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);
// Bad because 8 is a loop head.
ASSERT_FALSE(TransformationAddDeadBlock(100, 8, true)
.IsApplicable(context.get(), transformation_context));
}
TEST(TransformationAddDeadBlockTest, OpPhiInTarget) {
std::string shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 310
OpName %4 "main"
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeBool
%7 = OpConstantTrue %6
%9 = OpTypeInt 32 0
%10 = OpConstant %9 1
%4 = OpFunction %2 None %3
%5 = OpLabel
OpBranch %8
%8 = OpLabel
%12 = OpPhi %6 %7 %5
%13 = OpPhi %9 %10 %5
OpReturn
OpFunctionEnd
)";
const auto env = SPV_ENV_UNIVERSAL_1_4;
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);
TransformationAddDeadBlock transformation(100, 5, true);
ASSERT_TRUE(
transformation.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation, context.get(), &transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
ASSERT_TRUE(transformation_context.GetFactManager()->BlockIsDead(100));
std::string after_transformation = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 310
OpName %4 "main"
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeBool
%7 = OpConstantTrue %6
%9 = OpTypeInt 32 0
%10 = OpConstant %9 1
%4 = OpFunction %2 None %3
%5 = OpLabel
OpSelectionMerge %8 None
OpBranchConditional %7 %8 %100
%100 = OpLabel
OpBranch %8
%8 = OpLabel
%12 = OpPhi %6 %7 %5 %7 %100
%13 = OpPhi %9 %10 %5 %10 %100
OpReturn
OpFunctionEnd
)";
ASSERT_TRUE(IsEqual(env, after_transformation, context.get()));
}
TEST(TransformationAddDeadBlockTest, BackEdge) {
std::string shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 310
OpName %4 "main"
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeBool
%7 = OpConstantTrue %6
%4 = OpFunction %2 None %3
%5 = OpLabel
OpBranch %8
%8 = OpLabel
OpLoopMerge %10 %9 None
OpBranchConditional %7 %9 %10
%9 = OpLabel
OpBranch %8
%10 = OpLabel
OpReturn
OpFunctionEnd
)";
const auto env = SPV_ENV_UNIVERSAL_1_4;
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);
// 9 is a back edge block, so it would not be OK to add a dead block here,
// as then both 9 and the dead block would branch to the loop header, 8.
ASSERT_FALSE(TransformationAddDeadBlock(100, 9, true)
.IsApplicable(context.get(), transformation_context));
}
} // namespace
} // namespace fuzz
} // namespace spvtools