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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_opphi_id_from_dead_predecessor.h"
#include "gtest/gtest.h"
#include "source/fuzz/fuzzer_util.h"
#include "test/fuzz/fuzz_test_util.h"
namespace spvtools {
namespace fuzz {
namespace {
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"
%3 = OpTypeVoid
%4 = OpTypeFunction %3
%5 = OpTypeBool
%6 = OpConstantTrue %5
%7 = OpConstantFalse %5
%8 = OpTypeInt 32 1
%9 = OpConstant %8 2
%10 = OpConstant %8 3
%11 = OpConstant %8 4
%12 = OpConstant %8 5
%13 = OpConstant %8 6
%2 = OpFunction %3 None %4
%14 = OpLabel
OpSelectionMerge %15 None
OpBranchConditional %6 %16 %17
%16 = OpLabel
%18 = OpCopyObject %8 %9
OpSelectionMerge %19 None
OpBranchConditional %7 %20 %21
%20 = OpLabel
%22 = OpCopyObject %8 %10
%23 = OpCopyObject %8 %12
OpBranch %19
%21 = OpLabel
%24 = OpCopyObject %8 %9
OpBranch %19
%19 = OpLabel
%25 = OpPhi %8 %22 %20 %24 %21
OpBranch %15
%17 = OpLabel
%26 = OpCopyObject %8 %12
%27 = OpCopyObject %8 %13
OpBranch %28
%28 = OpLabel
%29 = OpPhi %8 %27 %17
OpBranch %15
%15 = OpLabel
%30 = OpPhi %8 %25 %19 %26 %28
OpReturn
OpFunctionEnd
)";
TEST(TransformationReplaceOpPhiIdFromDeadPredecessorTest, 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;
TransformationContext transformation_context(
MakeUnique<FactManager>(context.get()), validator_options);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
// Record the fact that blocks 20, 17, 28 are dead.
transformation_context.GetFactManager()->AddFactBlockIsDead(20);
transformation_context.GetFactManager()->AddFactBlockIsDead(17);
transformation_context.GetFactManager()->AddFactBlockIsDead(28);
// %26 is not an OpPhi instruction.
ASSERT_FALSE(TransformationReplaceOpPhiIdFromDeadPredecessor(26, 14, 10)
.IsApplicable(context.get(), transformation_context));
// %25 is not a block label.
ASSERT_FALSE(TransformationReplaceOpPhiIdFromDeadPredecessor(30, 25, 10)
.IsApplicable(context.get(), transformation_context));
// %14 is not a predecessor of %28 (which contains %29).
ASSERT_FALSE(TransformationReplaceOpPhiIdFromDeadPredecessor(29, 14, 10)
.IsApplicable(context.get(), transformation_context));
// %19 is not a dead block.
ASSERT_FALSE(TransformationReplaceOpPhiIdFromDeadPredecessor(30, 19, 10)
.IsApplicable(context.get(), transformation_context));
// %7 does not have the same type id as %25.
ASSERT_FALSE(
TransformationReplaceOpPhiIdFromDeadPredecessor(25, 20, 7).IsApplicable(
context.get(), transformation_context));
// %29 is not available at the end of %20.
ASSERT_FALSE(TransformationReplaceOpPhiIdFromDeadPredecessor(25, 20, 29)
.IsApplicable(context.get(), transformation_context));
}
TEST(TransformationReplaceOpPhiIdFromDeadPredecessorTest, 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;
TransformationContext transformation_context(
MakeUnique<FactManager>(context.get()), validator_options);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
// Record the fact that blocks 20, 17, 28 are dead.
transformation_context.GetFactManager()->AddFactBlockIsDead(20);
transformation_context.GetFactManager()->AddFactBlockIsDead(17);
transformation_context.GetFactManager()->AddFactBlockIsDead(28);
auto transformation1 =
TransformationReplaceOpPhiIdFromDeadPredecessor(25, 20, 18);
ASSERT_TRUE(
transformation1.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation1, context.get(),
&transformation_context);
auto transformation2 =
TransformationReplaceOpPhiIdFromDeadPredecessor(30, 28, 29);
ASSERT_TRUE(
transformation2.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation2, context.get(),
&transformation_context);
auto transformation3 =
TransformationReplaceOpPhiIdFromDeadPredecessor(29, 17, 10);
ASSERT_TRUE(
transformation3.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation3, context.get(),
&transformation_context);
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
std::string after_transformations = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %2 "main"
OpExecutionMode %2 OriginUpperLeft
OpSource ESSL 310
OpName %2 "main"
%3 = OpTypeVoid
%4 = OpTypeFunction %3
%5 = OpTypeBool
%6 = OpConstantTrue %5
%7 = OpConstantFalse %5
%8 = OpTypeInt 32 1
%9 = OpConstant %8 2
%10 = OpConstant %8 3
%11 = OpConstant %8 4
%12 = OpConstant %8 5
%13 = OpConstant %8 6
%2 = OpFunction %3 None %4
%14 = OpLabel
OpSelectionMerge %15 None
OpBranchConditional %6 %16 %17
%16 = OpLabel
%18 = OpCopyObject %8 %9
OpSelectionMerge %19 None
OpBranchConditional %7 %20 %21
%20 = OpLabel
%22 = OpCopyObject %8 %10
%23 = OpCopyObject %8 %12
OpBranch %19
%21 = OpLabel
%24 = OpCopyObject %8 %9
OpBranch %19
%19 = OpLabel
%25 = OpPhi %8 %18 %20 %24 %21
OpBranch %15
%17 = OpLabel
%26 = OpCopyObject %8 %12
%27 = OpCopyObject %8 %13
OpBranch %28
%28 = OpLabel
%29 = OpPhi %8 %10 %17
OpBranch %15
%15 = OpLabel
%30 = OpPhi %8 %25 %19 %29 %28
OpReturn
OpFunctionEnd
)";
ASSERT_TRUE(IsEqual(env, after_transformations, context.get()));
}
} // namespace
} // namespace fuzz
} // namespace spvtools