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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/comparator_deep_blocks_first.h"
#include "gtest/gtest.h"
#include "source/fuzz/fact_manager/fact_manager.h"
#include "source/fuzz/fuzzer_util.h"
#include "source/fuzz/pseudo_random_generator.h"
#include "source/fuzz/transformation_context.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
%3 = OpTypeVoid
%4 = OpTypeFunction %3
%5 = OpTypeBool
%6 = OpConstantTrue %5
%7 = OpTypeInt 32 1
%8 = OpTypePointer Function %7
%9 = OpConstant %7 1
%10 = OpConstant %7 10
%11 = OpConstant %7 2
%2 = OpFunction %3 None %4
%12 = OpLabel
OpSelectionMerge %13 None
OpBranchConditional %6 %14 %15
%14 = OpLabel
OpBranch %13
%15 = OpLabel
OpBranch %16
%16 = OpLabel
OpLoopMerge %17 %18 None
OpBranch %19
%19 = OpLabel
OpBranchConditional %6 %20 %17
%20 = OpLabel
OpSelectionMerge %21 None
OpBranchConditional %6 %22 %23
%22 = OpLabel
OpBranch %21
%23 = OpLabel
OpBranch %21
%21 = OpLabel
OpBranch %18
%18 = OpLabel
OpBranch %16
%17 = OpLabel
OpBranch %13
%13 = OpLabel
OpReturn
OpFunctionEnd
)";
TEST(ComparatorDeepBlocksFirstTest, Compare) {
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);
auto is_deeper = ComparatorDeepBlocksFirst(context.get());
// The block ids and the corresponding depths are:
// 12, 13 -> depth 0
// 14, 15, 16, 17 -> depth 1
// 18, 19, 20, 21 -> depth 2
// 22, 23 -> depth 3
// Perform some comparisons and check that they return true iff the first
// block is deeper than the second.
ASSERT_FALSE(is_deeper(12, 12));
ASSERT_FALSE(is_deeper(12, 13));
ASSERT_FALSE(is_deeper(12, 14));
ASSERT_FALSE(is_deeper(12, 18));
ASSERT_FALSE(is_deeper(12, 22));
ASSERT_TRUE(is_deeper(14, 12));
ASSERT_FALSE(is_deeper(14, 15));
ASSERT_FALSE(is_deeper(15, 14));
ASSERT_FALSE(is_deeper(14, 18));
ASSERT_TRUE(is_deeper(18, 12));
ASSERT_TRUE(is_deeper(18, 16));
}
TEST(ComparatorDeepBlocksFirstTest, Sort) {
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);
// Check that, sorting using the comparator, the blocks are ordered from more
// deeply nested to less deeply nested.
// 17 has depth 1, 20 has depth 2, 13 has depth 0.
std::vector<opt::BasicBlock*> blocks = {context->get_instr_block(17),
context->get_instr_block(20),
context->get_instr_block(13)};
std::sort(blocks.begin(), blocks.end(),
ComparatorDeepBlocksFirst(context.get()));
// Check that the blocks are in the correct order.
ASSERT_EQ(blocks[0]->id(), 20);
ASSERT_EQ(blocks[1]->id(), 17);
ASSERT_EQ(blocks[2]->id(), 13);
}
} // namespace
} // namespace fuzz
} // namespace spvtools
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