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transformation_add_loop_preheader_test.cpp
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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_add_loop_preheader.h"
#include "gtest/gtest.h"
#include "source/fuzz/fuzzer_util.h"
#include "test/fuzz/fuzz_test_util.h"
namespace spvtools {
namespace fuzz {
namespace {
TEST(TransformationAddLoopPreheaderTest, SimpleTest) {
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 = OpConstantFalse %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
OpLoopMerge %12 %11 None
OpBranch %11
%11 = OpLabel
OpBranchConditional %7 %10 %12
%12 = OpLabel
OpLoopMerge %14 %13 None
OpBranch %13
%13 = OpLabel
OpBranchConditional %7 %14 %12
%15 = OpLabel
OpLoopMerge %17 %16 None
OpBranch %16
%16 = OpLabel
OpBranchConditional %7 %15 %17
%17 = OpLabel
OpBranch %14
%14 = OpLabel
OpReturn
OpFunctionEnd
)";
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));
// %9 is not a loop header
ASSERT_FALSE(TransformationAddLoopPreheader(9, 15, {}).IsApplicable(
context.get(), transformation_context));
// The id %12 is not fresh
ASSERT_FALSE(TransformationAddLoopPreheader(10, 12, {})
.IsApplicable(context.get(), transformation_context));
// Loop header %15 is not reachable (the only predecessor is the back-edge
// block)
ASSERT_FALSE(TransformationAddLoopPreheader(15, 100, {})
.IsApplicable(context.get(), transformation_context));
auto transformation1 = TransformationAddLoopPreheader(10, 20, {});
ASSERT_TRUE(
transformation1.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation1, context.get(),
&transformation_context);
auto transformation2 = TransformationAddLoopPreheader(12, 21, {});
ASSERT_TRUE(
transformation2.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation2, 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 %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 310
OpName %4 "main"
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeBool
%7 = OpConstantFalse %6
%4 = OpFunction %2 None %3
%5 = OpLabel
OpSelectionMerge %20 None
OpBranchConditional %7 %8 %9
%8 = OpLabel
OpBranch %20
%9 = OpLabel
OpBranch %20
%20 = OpLabel
OpBranch %10
%10 = OpLabel
OpLoopMerge %21 %11 None
OpBranch %11
%11 = OpLabel
OpBranchConditional %7 %10 %21
%21 = OpLabel
OpBranch %12
%12 = OpLabel
OpLoopMerge %14 %13 None
OpBranch %13
%13 = OpLabel
OpBranchConditional %7 %14 %12
%15 = OpLabel
OpLoopMerge %17 %16 None
OpBranch %16
%16 = OpLabel
OpBranchConditional %7 %15 %17
%17 = OpLabel
OpBranch %14
%14 = OpLabel
OpReturn
OpFunctionEnd
)";
ASSERT_TRUE(IsEqual(env, after_transformations, context.get()));
}
TEST(TransformationAddLoopPreheaderTest, OpPhi) {
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 = OpConstantFalse %6
%4 = OpFunction %2 None %3
%5 = OpLabel
%20 = OpCopyObject %6 %7
OpBranch %8
%8 = OpLabel
%31 = OpPhi %6 %20 %5 %21 %9
OpLoopMerge %10 %9 None
OpBranch %9
%9 = OpLabel
%21 = OpCopyObject %6 %7
OpBranchConditional %7 %8 %10
%10 = OpLabel
OpSelectionMerge %13 None
OpBranchConditional %7 %11 %12
%11 = OpLabel
%22 = OpCopyObject %6 %7
OpBranch %13
%12 = OpLabel
%23 = OpCopyObject %6 %7
OpBranch %13
%13 = OpLabel
%32 = OpPhi %6 %22 %11 %23 %12 %24 %14
%33 = OpPhi %6 %7 %11 %7 %12 %24 %14
OpLoopMerge %15 %14 None
OpBranch %14
%14 = OpLabel
%24 = OpCopyObject %6 %7
OpBranchConditional %7 %13 %15
%15 = OpLabel
OpReturn
OpFunctionEnd
)";
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));
auto transformation1 = TransformationAddLoopPreheader(8, 40, {});
ASSERT_TRUE(
transformation1.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation1, context.get(),
&transformation_context);
// Not enough ids for the OpPhi instructions are given
ASSERT_FALSE(TransformationAddLoopPreheader(13, 41, {})
.IsApplicable(context.get(), transformation_context));
// Not enough ids for the OpPhi instructions are given
ASSERT_FALSE(TransformationAddLoopPreheader(13, 41, {42})
.IsApplicable(context.get(), transformation_context));
// One of the ids is not fresh
ASSERT_FALSE(TransformationAddLoopPreheader(13, 41, {31, 42})
.IsApplicable(context.get(), transformation_context));
// One of the ids is repeated
ASSERT_FALSE(TransformationAddLoopPreheader(13, 41, {41, 42})
.IsApplicable(context.get(), transformation_context));
auto transformation2 = TransformationAddLoopPreheader(13, 41, {42, 43});
ASSERT_TRUE(
transformation2.IsApplicable(context.get(), transformation_context));
ApplyAndCheckFreshIds(transformation2, 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 %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 310
OpName %4 "main"
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeBool
%7 = OpConstantFalse %6
%4 = OpFunction %2 None %3
%5 = OpLabel
%20 = OpCopyObject %6 %7
OpBranch %40
%40 = OpLabel
OpBranch %8
%8 = OpLabel
%31 = OpPhi %6 %20 %40 %21 %9
OpLoopMerge %10 %9 None
OpBranch %9
%9 = OpLabel
%21 = OpCopyObject %6 %7
OpBranchConditional %7 %8 %10
%10 = OpLabel
OpSelectionMerge %41 None
OpBranchConditional %7 %11 %12
%11 = OpLabel
%22 = OpCopyObject %6 %7
OpBranch %41
%12 = OpLabel
%23 = OpCopyObject %6 %7
OpBranch %41
%41 = OpLabel
%42 = OpPhi %6 %22 %11 %23 %12
%43 = OpPhi %6 %7 %11 %7 %12
OpBranch %13
%13 = OpLabel
%32 = OpPhi %6 %42 %41 %24 %14
%33 = OpPhi %6 %43 %41 %24 %14
OpLoopMerge %15 %14 None
OpBranch %14
%14 = OpLabel
%24 = OpCopyObject %6 %7
OpBranchConditional %7 %13 %15
%15 = OpLabel
OpReturn
OpFunctionEnd
)";
ASSERT_TRUE(IsEqual(env, after_transformations, context.get()));
}
} // namespace
} // namespace fuzz
} // namespace spvtools