compiler/optimizing/scheduler_test.cc - LeafOS-Project/android_art - Gitiles

 /*
  * Copyright (C) 2016 The Android Open Source Project
  *
  * 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 "scheduler.h"

 #include "base/arena_allocator.h"
 #include "base/macros.h"
 #include "builder.h"
 #include "codegen_test_utils.h"
 #include "common_compiler_test.h"
 #include "load_store_analysis.h"
 #include "nodes.h"
 #include "optimizing_unit_test.h"
 #include "pc_relative_fixups_x86.h"
 #include "register_allocator.h"

 #ifdef ART_ENABLE_CODEGEN_arm64
 #include "scheduler_arm64.h"
 #endif

 #ifdef ART_ENABLE_CODEGEN_arm
 #include "scheduler_arm.h"
 #endif

 namespace art HIDDEN {

 // Return all combinations of ISA and code generator that are executable on
 // hardware, or on simulator, and that we'd like to test.
 static ::std::vector<CodegenTargetConfig> GetTargetConfigs() {
   ::std::vector<CodegenTargetConfig> v;
   ::std::vector<CodegenTargetConfig> test_config_candidates = {
 #ifdef ART_ENABLE_CODEGEN_arm
     // TODO: Should't this be `kThumb2` instead of `kArm` here?
     CodegenTargetConfig(InstructionSet::kArm, create_codegen_arm_vixl32),
 #endif
 #ifdef ART_ENABLE_CODEGEN_arm64
     CodegenTargetConfig(InstructionSet::kArm64, create_codegen_arm64),
 #endif
 #ifdef ART_ENABLE_CODEGEN_x86
     CodegenTargetConfig(InstructionSet::kX86, create_codegen_x86),
 #endif
 #ifdef ART_ENABLE_CODEGEN_x86_64
     CodegenTargetConfig(InstructionSet::kX86_64, create_codegen_x86_64),
 #endif
   };

   for (const CodegenTargetConfig& test_config : test_config_candidates) {
     if (CanExecute(test_config.GetInstructionSet())) {
       v.push_back(test_config);
     }
   }

   return v;
 }

 class SchedulerTest : public CommonCompilerTest, public OptimizingUnitTestHelper {
  public:
   SchedulerTest() : graph_(CreateGraph()) { }

   // Build scheduling graph, and run target specific scheduling on it.
   void TestBuildDependencyGraphAndSchedule(HScheduler* scheduler) {
     HBasicBlock* entry = new (GetAllocator()) HBasicBlock(graph_);
     HBasicBlock* block1 = new (GetAllocator()) HBasicBlock(graph_);
     graph_->AddBlock(entry);
     graph_->AddBlock(block1);
     graph_->SetEntryBlock(entry);

     // entry:
     // array         ParameterValue
     // c1            IntConstant
     // c2            IntConstant
     // block1:
     // add1          Add [c1, c2]
     // add2          Add [add1, c2]
     // mul           Mul [add1, add2]
     // div_check     DivZeroCheck [add2] (env: add2, mul)
     // div           Div [add1, div_check]
     // array_get1    ArrayGet [array, add1]
     // array_set1    ArraySet [array, add1, add2]
     // array_get2    ArrayGet [array, add1]
     // array_set2    ArraySet [array, add1, add2]

     HInstruction* array = new (GetAllocator()) HParameterValue(graph_->GetDexFile(),
                                                            dex::TypeIndex(0),
                                                            0,
                                                            DataType::Type::kReference);
     HInstruction* c1 = graph_->GetIntConstant(1);
     HInstruction* c2 = graph_->GetIntConstant(10);
     HInstruction* add1 = new (GetAllocator()) HAdd(DataType::Type::kInt32, c1, c2);
     HInstruction* add2 = new (GetAllocator()) HAdd(DataType::Type::kInt32, add1, c2);
     HInstruction* mul = new (GetAllocator()) HMul(DataType::Type::kInt32, add1, add2);
     HInstruction* div_check = new (GetAllocator()) HDivZeroCheck(add2, 0);
     HInstruction* div = new (GetAllocator()) HDiv(DataType::Type::kInt32, add1, div_check, 0);
     HInstruction* array_get1 =
         new (GetAllocator()) HArrayGet(array, add1, DataType::Type::kInt32, 0);
     HInstruction* array_set1 =
         new (GetAllocator()) HArraySet(array, add1, add2, DataType::Type::kInt32, 0);
     HInstruction* array_get2 =
         new (GetAllocator()) HArrayGet(array, add1, DataType::Type::kInt32, 0);
     HInstruction* array_set2 =
         new (GetAllocator()) HArraySet(array, add1, add2, DataType::Type::kInt32, 0);

     DCHECK(div_check->CanThrow());

     entry->AddInstruction(array);

     HInstruction* block_instructions[] = {add1,
                                           add2,
                                           mul,
                                           div_check,
                                           div,
                                           array_get1,
                                           array_set1,
                                           array_get2,
                                           array_set2};
     for (HInstruction* instr : block_instructions) {
       block1->AddInstruction(instr);
     }

     HEnvironment* environment = new (GetAllocator()) HEnvironment(GetAllocator(),
                                                                   2,
                                                                   graph_->GetArtMethod(),
                                                                   0,
                                                                   div_check);
     div_check->SetRawEnvironment(environment);
     environment->SetRawEnvAt(0, add2);
     add2->AddEnvUseAt(div_check->GetEnvironment(), 0);
     environment->SetRawEnvAt(1, mul);
     mul->AddEnvUseAt(div_check->GetEnvironment(), 1);

     TestSchedulingGraph scheduling_graph(GetScopedAllocator());
     // Instructions must be inserted in reverse order into the scheduling graph.
     for (HInstruction* instr : ReverseRange(block_instructions)) {
       scheduling_graph.AddNode(instr);
     }

     // Should not have dependencies cross basic blocks.
     ASSERT_FALSE(scheduling_graph.HasImmediateDataDependency(add1, c1));
     ASSERT_FALSE(scheduling_graph.HasImmediateDataDependency(add2, c2));

     // Define-use dependency.
     ASSERT_TRUE(scheduling_graph.HasImmediateDataDependency(add2, add1));
     ASSERT_FALSE(scheduling_graph.HasImmediateDataDependency(add1, add2));
     ASSERT_TRUE(scheduling_graph.HasImmediateDataDependency(div_check, add2));
     ASSERT_FALSE(scheduling_graph.HasImmediateDataDependency(div_check, add1));
     ASSERT_TRUE(scheduling_graph.HasImmediateDataDependency(div, div_check));
     ASSERT_TRUE(scheduling_graph.HasImmediateDataDependency(array_set1, add1));
     ASSERT_TRUE(scheduling_graph.HasImmediateDataDependency(array_set1, add2));

     // Read and write dependencies
     ASSERT_TRUE(scheduling_graph.HasImmediateOtherDependency(array_set1, array_get1));
     ASSERT_TRUE(scheduling_graph.HasImmediateOtherDependency(array_set2, array_get2));
     ASSERT_TRUE(scheduling_graph.HasImmediateOtherDependency(array_get2, array_set1));
     // Unnecessary dependency is not stored, we rely on transitive dependencies.
     // The array_set2 -> array_get2 -> array_set1 dependencies are tested above.
     ASSERT_FALSE(scheduling_graph.HasImmediateOtherDependency(array_set2, array_set1));

     // Env dependency.
     ASSERT_TRUE(scheduling_graph.HasImmediateOtherDependency(div_check, mul));
     ASSERT_FALSE(scheduling_graph.HasImmediateOtherDependency(mul, div_check));

     // CanThrow.
     ASSERT_TRUE(scheduling_graph.HasImmediateOtherDependency(array_set1, div_check));

     // Exercise the code path of target specific scheduler and SchedulingLatencyVisitor.
     scheduler->Schedule(graph_);
   }

   void CompileWithRandomSchedulerAndRun(const std::vector<uint16_t>& data,
                                         bool has_result,
                                         int expected) {
     for (CodegenTargetConfig target_config : GetTargetConfigs()) {
       HGraph* graph = CreateCFG(data);

       // Schedule the graph randomly.
       HInstructionScheduling scheduling(graph, target_config.GetInstructionSet());
       scheduling.Run(/*only_optimize_loop_blocks*/ false, /*schedule_randomly*/ true);

       std::unique_ptr<CompilerOptions> compiler_options =
           CommonCompilerTest::CreateCompilerOptions(target_config.GetInstructionSet(), "default");
       RunCode(target_config,
               *compiler_options,
               graph,
               [](HGraph* graph_arg) { RemoveSuspendChecks(graph_arg); },
               has_result, expected);
     }
   }

   void TestDependencyGraphOnAliasingArrayAccesses(HScheduler* scheduler) {
     HBasicBlock* entry = new (GetAllocator()) HBasicBlock(graph_);
     graph_->AddBlock(entry);
     graph_->SetEntryBlock(entry);
     graph_->BuildDominatorTree();

     HInstruction* arr = new (GetAllocator()) HParameterValue(graph_->GetDexFile(),
                                                              dex::TypeIndex(0),
                                                              0,
                                                              DataType::Type::kReference);
     HInstruction* i = new (GetAllocator()) HParameterValue(graph_->GetDexFile(),
                                                            dex::TypeIndex(1),
                                                            1,
                                                            DataType::Type::kInt32);
     HInstruction* j = new (GetAllocator()) HParameterValue(graph_->GetDexFile(),
                                                            dex::TypeIndex(1),
                                                            1,
                                                            DataType::Type::kInt32);
     HInstruction* object = new (GetAllocator()) HParameterValue(graph_->GetDexFile(),
                                                                 dex::TypeIndex(0),
                                                                 0,
                                                                 DataType::Type::kReference);
     HInstruction* c0 = graph_->GetIntConstant(0);
     HInstruction* c1 = graph_->GetIntConstant(1);
     HInstruction* add0 = new (GetAllocator()) HAdd(DataType::Type::kInt32, i, c0);
     HInstruction* add1 = new (GetAllocator()) HAdd(DataType::Type::kInt32, i, c1);
     HInstruction* sub0 = new (GetAllocator()) HSub(DataType::Type::kInt32, i, c0);
     HInstruction* sub1 = new (GetAllocator()) HSub(DataType::Type::kInt32, i, c1);
     HInstruction* arr_set_0 =
         new (GetAllocator()) HArraySet(arr, c0, c0, DataType::Type::kInt32, 0);
     HInstruction* arr_set_1 =
         new (GetAllocator()) HArraySet(arr, c1, c0, DataType::Type::kInt32, 0);
     HInstruction* arr_set_i = new (GetAllocator()) HArraySet(arr, i, c0, DataType::Type::kInt32, 0);
     HInstruction* arr_set_add0 =
         new (GetAllocator()) HArraySet(arr, add0, c0, DataType::Type::kInt32, 0);
     HInstruction* arr_set_add1 =
         new (GetAllocator()) HArraySet(arr, add1, c0, DataType::Type::kInt32, 0);
     HInstruction* arr_set_sub0 =
         new (GetAllocator()) HArraySet(arr, sub0, c0, DataType::Type::kInt32, 0);
     HInstruction* arr_set_sub1 =
         new (GetAllocator()) HArraySet(arr, sub1, c0, DataType::Type::kInt32, 0);
     HInstruction* arr_set_j = new (GetAllocator()) HArraySet(arr, j, c0, DataType::Type::kInt32, 0);
     HInstanceFieldSet* set_field10 = new (GetAllocator()) HInstanceFieldSet(object,
                                                                             c1,
                                                                             nullptr,
                                                                             DataType::Type::kInt32,
                                                                             MemberOffset(10),
                                                                             false,
                                                                             kUnknownFieldIndex,
                                                                             kUnknownClassDefIndex,
                                                                             graph_->GetDexFile(),
                                                                             0);

     HInstruction* block_instructions[] = {arr,
                                           i,
                                           j,
                                           object,
                                           add0,
                                           add1,
                                           sub0,
                                           sub1,
                                           arr_set_0,
                                           arr_set_1,
                                           arr_set_i,
                                           arr_set_add0,
                                           arr_set_add1,
                                           arr_set_sub0,
                                           arr_set_sub1,
                                           arr_set_j,
                                           set_field10};

     for (HInstruction* instr : block_instructions) {
       entry->AddInstruction(instr);
     }

     HeapLocationCollector heap_location_collector(
         graph_, GetScopedAllocator(), LoadStoreAnalysisType::kBasic);
     heap_location_collector.VisitBasicBlock(entry);
     heap_location_collector.BuildAliasingMatrix();
     TestSchedulingGraph scheduling_graph(GetScopedAllocator(), &heap_location_collector);

     for (HInstruction* instr : ReverseRange(block_instructions)) {
       // Build scheduling graph with memory access aliasing information
       // from LSA/heap_location_collector.
       scheduling_graph.AddNode(instr);
     }

     // LSA/HeapLocationCollector should see those ArraySet instructions.
     ASSERT_EQ(heap_location_collector.GetNumberOfHeapLocations(), 9U);
     ASSERT_TRUE(heap_location_collector.HasHeapStores());

     // Test queries on HeapLocationCollector's aliasing matrix after load store analysis.
     // HeapLocationCollector and SchedulingGraph should report consistent relationships.
     size_t loc1 = HeapLocationCollector::kHeapLocationNotFound;
     size_t loc2 = HeapLocationCollector::kHeapLocationNotFound;

     // Test side effect dependency: array[0] and array[1]
     loc1 = heap_location_collector.GetArrayHeapLocation(arr_set_0);
     loc2 = heap_location_collector.GetArrayHeapLocation(arr_set_1);
     ASSERT_FALSE(heap_location_collector.MayAlias(loc1, loc2));
     ASSERT_FALSE(scheduling_graph.HasImmediateOtherDependency(arr_set_1, arr_set_0));

     // Test side effect dependency based on LSA analysis: array[i] and array[j]
     loc1 = heap_location_collector.GetArrayHeapLocation(arr_set_i);
     loc2 = heap_location_collector.GetArrayHeapLocation(arr_set_j);
     ASSERT_TRUE(heap_location_collector.MayAlias(loc1, loc2));
     // Unnecessary dependency is not stored, we rely on transitive dependencies.
     // The arr_set_j -> arr_set_sub0 -> arr_set_add0 -> arr_set_i dependencies are tested below.
     ASSERT_FALSE(scheduling_graph.HasImmediateOtherDependency(arr_set_j, arr_set_i));

     // Test side effect dependency based on LSA analysis: array[i] and array[i+0]
     loc1 = heap_location_collector.GetArrayHeapLocation(arr_set_i);
     loc2 = heap_location_collector.GetArrayHeapLocation(arr_set_add0);
     ASSERT_TRUE(heap_location_collector.MayAlias(loc1, loc2));
     ASSERT_TRUE(scheduling_graph.HasImmediateOtherDependency(arr_set_add0, arr_set_i));

     // Test side effect dependency based on LSA analysis: array[i] and array[i-0]
     loc1 = heap_location_collector.GetArrayHeapLocation(arr_set_i);
     loc2 = heap_location_collector.GetArrayHeapLocation(arr_set_sub0);
     ASSERT_TRUE(heap_location_collector.MayAlias(loc1, loc2));
     // Unnecessary dependency is not stored, we rely on transitive dependencies.
     ASSERT_FALSE(scheduling_graph.HasImmediateOtherDependency(arr_set_sub0, arr_set_i));
     // Instead, we rely on arr_set_sub0 -> arr_set_add0 -> arr_set_i, the latter is tested above.
     ASSERT_TRUE(scheduling_graph.HasImmediateOtherDependency(arr_set_sub0, arr_set_add0));

     // Test side effect dependency based on LSA analysis: array[i] and array[i+1]
     loc1 = heap_location_collector.GetArrayHeapLocation(arr_set_i);
     loc2 = heap_location_collector.GetArrayHeapLocation(arr_set_add1);
     ASSERT_FALSE(heap_location_collector.MayAlias(loc1, loc2));
     ASSERT_FALSE(scheduling_graph.HasImmediateOtherDependency(arr_set_add1, arr_set_i));

     // Test side effect dependency based on LSA analysis: array[i+1] and array[i-1]
     loc1 = heap_location_collector.GetArrayHeapLocation(arr_set_add1);
     loc2 = heap_location_collector.GetArrayHeapLocation(arr_set_sub1);
     ASSERT_FALSE(heap_location_collector.MayAlias(loc1, loc2));
     ASSERT_FALSE(scheduling_graph.HasImmediateOtherDependency(arr_set_sub1, arr_set_add1));

     // Test side effect dependency based on LSA analysis: array[j] and all others array accesses
     ASSERT_TRUE(scheduling_graph.HasImmediateOtherDependency(arr_set_j, arr_set_sub0));
     ASSERT_TRUE(scheduling_graph.HasImmediateOtherDependency(arr_set_j, arr_set_add1));
     ASSERT_TRUE(scheduling_graph.HasImmediateOtherDependency(arr_set_j, arr_set_sub1));
     // Unnecessary dependencies are not stored, we rely on transitive dependencies.
     ASSERT_FALSE(scheduling_graph.HasImmediateOtherDependency(arr_set_j, arr_set_i));
     ASSERT_FALSE(scheduling_graph.HasImmediateOtherDependency(arr_set_j, arr_set_add0));

     // Test that ArraySet and FieldSet should not have side effect dependency
     ASSERT_FALSE(scheduling_graph.HasImmediateOtherDependency(arr_set_i, set_field10));
     ASSERT_FALSE(scheduling_graph.HasImmediateOtherDependency(arr_set_j, set_field10));

     // Exercise target specific scheduler and SchedulingLatencyVisitor.
     scheduler->Schedule(graph_);
   }

   class TestSchedulingGraph : public SchedulingGraph {
    public:
     explicit TestSchedulingGraph(ScopedArenaAllocator* allocator,
                                  const HeapLocationCollector *heap_location_collector = nullptr)
         : SchedulingGraph(allocator, heap_location_collector) {}

     bool HasImmediateDataDependency(const HInstruction* instruction,
                                     const HInstruction* other_instruction) const {
       const SchedulingNode* node = GetNode(instruction);
       const SchedulingNode* other = GetNode(other_instruction);
       if (node == nullptr || other == nullptr) {
         // Both instructions must be in current basic block, i.e. the SchedulingGraph can see their
         // corresponding SchedulingNode in the graph, and tell whether there is a dependency.
         // Otherwise there is no dependency from SchedulingGraph's perspective, for example,
         // instruction and other_instruction are in different basic blocks.
         return false;
       }
       return node->HasDataDependency(other);
     }

     bool HasImmediateOtherDependency(const HInstruction* instruction,
                                      const HInstruction* other_instruction) const {
       const SchedulingNode* node = GetNode(instruction);
       const SchedulingNode* other = GetNode(other_instruction);
       if (node == nullptr || other == nullptr) {
         // Both instructions must be in current basic block, i.e. the SchedulingGraph can see their
         // corresponding SchedulingNode in the graph, and tell whether there is a dependency.
         // Otherwise there is no dependency from SchedulingGraph's perspective, for example,
         // instruction and other_instruction are in different basic blocks.
         return false;
       }
       return node->HasOtherDependency(other);
     }
   };

   HGraph* graph_;
 };

 #if defined(ART_ENABLE_CODEGEN_arm64)
 TEST_F(SchedulerTest, DependencyGraphAndSchedulerARM64) {
   CriticalPathSchedulingNodeSelector critical_path_selector;
   arm64::HSchedulerARM64 scheduler(&critical_path_selector);
   TestBuildDependencyGraphAndSchedule(&scheduler);
 }

 TEST_F(SchedulerTest, ArrayAccessAliasingARM64) {
   CriticalPathSchedulingNodeSelector critical_path_selector;
   arm64::HSchedulerARM64 scheduler(&critical_path_selector);
   TestDependencyGraphOnAliasingArrayAccesses(&scheduler);
 }
 #endif

 #if defined(ART_ENABLE_CODEGEN_arm)
 TEST_F(SchedulerTest, DependencyGraphAndSchedulerARM) {
   CriticalPathSchedulingNodeSelector critical_path_selector;
   arm::SchedulingLatencyVisitorARM arm_latency_visitor(/*CodeGenerator*/ nullptr);
   arm::HSchedulerARM scheduler(&critical_path_selector, &arm_latency_visitor);
   TestBuildDependencyGraphAndSchedule(&scheduler);
 }

 TEST_F(SchedulerTest, ArrayAccessAliasingARM) {
   CriticalPathSchedulingNodeSelector critical_path_selector;
   arm::SchedulingLatencyVisitorARM arm_latency_visitor(/*CodeGenerator*/ nullptr);
   arm::HSchedulerARM scheduler(&critical_path_selector, &arm_latency_visitor);
   TestDependencyGraphOnAliasingArrayAccesses(&scheduler);
 }
 #endif

 TEST_F(SchedulerTest, RandomScheduling) {
   //
   // Java source: crafted code to make sure (random) scheduling should get correct result.
   //
   //  int result = 0;
   //  float fr = 10.0f;
   //  for (int i = 1; i < 10; i++) {
   //    fr ++;
   //    int t1 = result >> i;
   //    int t2 = result * i;
   //    result = result + t1 - t2;
   //    fr = fr / i;
   //    result += (int)fr;
   //  }
   //  return result;
   //
   const std::vector<uint16_t> data = SIX_REGISTERS_CODE_ITEM(
     Instruction::CONST_4 | 0 << 12 | 2 << 8,          // const/4 v2, #int 0
     Instruction::CONST_HIGH16 | 0 << 8, 0x4120,       // const/high16 v0, #float 10.0 // #41200000
     Instruction::CONST_4 | 1 << 12 | 1 << 8,          // const/4 v1, #int 1
     Instruction::CONST_16 | 5 << 8, 0x000a,           // const/16 v5, #int 10
     Instruction::IF_GE | 5 << 12 | 1 << 8, 0x0014,    // if-ge v1, v5, 001a // +0014
     Instruction::CONST_HIGH16 | 5 << 8, 0x3f80,       // const/high16 v5, #float 1.0 // #3f800000
     Instruction::ADD_FLOAT_2ADDR | 5 << 12 | 0 << 8,  // add-float/2addr v0, v5
     Instruction::SHR_INT | 3 << 8, 1 << 8 | 2 ,       // shr-int v3, v2, v1
     Instruction::MUL_INT | 4 << 8, 1 << 8 | 2,        // mul-int v4, v2, v1
     Instruction::ADD_INT | 5 << 8, 3 << 8 | 2,        // add-int v5, v2, v3
     Instruction::SUB_INT | 2 << 8, 4 << 8 | 5,        // sub-int v2, v5, v4
     Instruction::INT_TO_FLOAT | 1 << 12 | 5 << 8,     // int-to-float v5, v1
     Instruction::DIV_FLOAT_2ADDR | 5 << 12 | 0 << 8,  // div-float/2addr v0, v5
     Instruction::FLOAT_TO_INT | 0 << 12 | 5 << 8,     // float-to-int v5, v0
     Instruction::ADD_INT_2ADDR | 5 << 12 | 2 << 8,    // add-int/2addr v2, v5
     Instruction::ADD_INT_LIT8 | 1 << 8, 1 << 8 | 1,   // add-int/lit8 v1, v1, #int 1 // #01
     Instruction::GOTO | 0xeb << 8,                    // goto 0004 // -0015
     Instruction::RETURN | 2 << 8);                    // return v2

   constexpr int kNumberOfRuns = 10;
   for (int i = 0; i < kNumberOfRuns; ++i) {
     CompileWithRandomSchedulerAndRun(data, true, 138774);
   }
 }

 }  // namespace art
	/*
	* Copyright (C) 2016 The Android Open Source Project
	*
	* 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 "scheduler.h"

	#include "base/arena_allocator.h"
	#include "base/macros.h"
	#include "builder.h"
	#include "codegen_test_utils.h"
	#include "common_compiler_test.h"
	#include "load_store_analysis.h"
	#include "nodes.h"
	#include "optimizing_unit_test.h"
	#include "pc_relative_fixups_x86.h"
	#include "register_allocator.h"

	#ifdef ART_ENABLE_CODEGEN_arm64
	#include "scheduler_arm64.h"
	#endif

	#ifdef ART_ENABLE_CODEGEN_arm
	#include "scheduler_arm.h"
	#endif

	namespace art HIDDEN {

	// Return all combinations of ISA and code generator that are executable on
	// hardware, or on simulator, and that we'd like to test.
	static ::std::vector<CodegenTargetConfig> GetTargetConfigs() {
	::std::vector<CodegenTargetConfig> v;
	::std::vector<CodegenTargetConfig> test_config_candidates = {
	#ifdef ART_ENABLE_CODEGEN_arm
	// TODO: Should't this be `kThumb2` instead of `kArm` here?
	CodegenTargetConfig(InstructionSet::kArm, create_codegen_arm_vixl32),
	#endif
	#ifdef ART_ENABLE_CODEGEN_arm64
	CodegenTargetConfig(InstructionSet::kArm64, create_codegen_arm64),
	#endif
	#ifdef ART_ENABLE_CODEGEN_x86
	CodegenTargetConfig(InstructionSet::kX86, create_codegen_x86),
	#endif
	#ifdef ART_ENABLE_CODEGEN_x86_64
	CodegenTargetConfig(InstructionSet::kX86_64, create_codegen_x86_64),
	#endif
	};

	for (const CodegenTargetConfig& test_config : test_config_candidates) {
	if (CanExecute(test_config.GetInstructionSet())) {
	v.push_back(test_config);
	}
	}

	return v;
	}

	class SchedulerTest : public CommonCompilerTest, public OptimizingUnitTestHelper {
	public:
	SchedulerTest() : graph_(CreateGraph()) { }

	// Build scheduling graph, and run target specific scheduling on it.
	void TestBuildDependencyGraphAndSchedule(HScheduler* scheduler) {
	HBasicBlock* entry = new (GetAllocator()) HBasicBlock(graph_);
	HBasicBlock* block1 = new (GetAllocator()) HBasicBlock(graph_);
	graph_->AddBlock(entry);
	graph_->AddBlock(block1);
	graph_->SetEntryBlock(entry);

	// entry:
	// array ParameterValue
	// c1 IntConstant
	// c2 IntConstant
	// block1:
	// add1 Add [c1, c2]
	// add2 Add [add1, c2]
	// mul Mul [add1, add2]
	// div_check DivZeroCheck [add2] (env: add2, mul)
	// div Div [add1, div_check]
	// array_get1 ArrayGet [array, add1]
	// array_set1 ArraySet [array, add1, add2]
	// array_get2 ArrayGet [array, add1]
	// array_set2 ArraySet [array, add1, add2]

	HInstruction* array = new (GetAllocator()) HParameterValue(graph_->GetDexFile(),
	dex::TypeIndex(0),
	0,
	DataType::Type::kReference);
	HInstruction* c1 = graph_->GetIntConstant(1);
	HInstruction* c2 = graph_->GetIntConstant(10);
	HInstruction* add1 = new (GetAllocator()) HAdd(DataType::Type::kInt32, c1, c2);
	HInstruction* add2 = new (GetAllocator()) HAdd(DataType::Type::kInt32, add1, c2);
	HInstruction* mul = new (GetAllocator()) HMul(DataType::Type::kInt32, add1, add2);
	HInstruction* div_check = new (GetAllocator()) HDivZeroCheck(add2, 0);
	HInstruction* div = new (GetAllocator()) HDiv(DataType::Type::kInt32, add1, div_check, 0);
	HInstruction* array_get1 =
	new (GetAllocator()) HArrayGet(array, add1, DataType::Type::kInt32, 0);
	HInstruction* array_set1 =
	new (GetAllocator()) HArraySet(array, add1, add2, DataType::Type::kInt32, 0);
	HInstruction* array_get2 =
	new (GetAllocator()) HArrayGet(array, add1, DataType::Type::kInt32, 0);
	HInstruction* array_set2 =
	new (GetAllocator()) HArraySet(array, add1, add2, DataType::Type::kInt32, 0);

	DCHECK(div_check->CanThrow());

	entry->AddInstruction(array);

	HInstruction* block_instructions[] = {add1,
	add2,
	mul,
	div_check,
	div,
	array_get1,
	array_set1,
	array_get2,
	array_set2};
	for (HInstruction* instr : block_instructions) {
	block1->AddInstruction(instr);
	}

	HEnvironment* environment = new (GetAllocator()) HEnvironment(GetAllocator(),
	2,
	graph_->GetArtMethod(),
	0,
	div_check);
	div_check->SetRawEnvironment(environment);
	environment->SetRawEnvAt(0, add2);
	add2->AddEnvUseAt(div_check->GetEnvironment(), 0);
	environment->SetRawEnvAt(1, mul);
	mul->AddEnvUseAt(div_check->GetEnvironment(), 1);

	TestSchedulingGraph scheduling_graph(GetScopedAllocator());
	// Instructions must be inserted in reverse order into the scheduling graph.
	for (HInstruction* instr : ReverseRange(block_instructions)) {
	scheduling_graph.AddNode(instr);
	}

	// Should not have dependencies cross basic blocks.
	ASSERT_FALSE(scheduling_graph.HasImmediateDataDependency(add1, c1));
	ASSERT_FALSE(scheduling_graph.HasImmediateDataDependency(add2, c2));

	// Define-use dependency.
	ASSERT_TRUE(scheduling_graph.HasImmediateDataDependency(add2, add1));
	ASSERT_FALSE(scheduling_graph.HasImmediateDataDependency(add1, add2));
	ASSERT_TRUE(scheduling_graph.HasImmediateDataDependency(div_check, add2));
	ASSERT_FALSE(scheduling_graph.HasImmediateDataDependency(div_check, add1));
	ASSERT_TRUE(scheduling_graph.HasImmediateDataDependency(div, div_check));
	ASSERT_TRUE(scheduling_graph.HasImmediateDataDependency(array_set1, add1));
	ASSERT_TRUE(scheduling_graph.HasImmediateDataDependency(array_set1, add2));

	// Read and write dependencies
	ASSERT_TRUE(scheduling_graph.HasImmediateOtherDependency(array_set1, array_get1));
	ASSERT_TRUE(scheduling_graph.HasImmediateOtherDependency(array_set2, array_get2));
	ASSERT_TRUE(scheduling_graph.HasImmediateOtherDependency(array_get2, array_set1));
	// Unnecessary dependency is not stored, we rely on transitive dependencies.
	// The array_set2 -> array_get2 -> array_set1 dependencies are tested above.
	ASSERT_FALSE(scheduling_graph.HasImmediateOtherDependency(array_set2, array_set1));

	// Env dependency.
	ASSERT_TRUE(scheduling_graph.HasImmediateOtherDependency(div_check, mul));
	ASSERT_FALSE(scheduling_graph.HasImmediateOtherDependency(mul, div_check));

	// CanThrow.
	ASSERT_TRUE(scheduling_graph.HasImmediateOtherDependency(array_set1, div_check));

	// Exercise the code path of target specific scheduler and SchedulingLatencyVisitor.
	scheduler->Schedule(graph_);
	}

	void CompileWithRandomSchedulerAndRun(const std::vector<uint16_t>& data,
	bool has_result,
	int expected) {
	for (CodegenTargetConfig target_config : GetTargetConfigs()) {
	HGraph* graph = CreateCFG(data);

	// Schedule the graph randomly.
	HInstructionScheduling scheduling(graph, target_config.GetInstructionSet());
	scheduling.Run(/only_optimize_loop_blocks/ false, /schedule_randomly/ true);

	std::unique_ptr<CompilerOptions> compiler_options =
	CommonCompilerTest::CreateCompilerOptions(target_config.GetInstructionSet(), "default");
	RunCode(target_config,
	*compiler_options,
	graph,
	[](HGraph* graph_arg) { RemoveSuspendChecks(graph_arg); },
	has_result, expected);
	}
	}

	void TestDependencyGraphOnAliasingArrayAccesses(HScheduler* scheduler) {
	HBasicBlock* entry = new (GetAllocator()) HBasicBlock(graph_);
	graph_->AddBlock(entry);
	graph_->SetEntryBlock(entry);
	graph_->BuildDominatorTree();

	HInstruction* arr = new (GetAllocator()) HParameterValue(graph_->GetDexFile(),
	dex::TypeIndex(0),
	0,
	DataType::Type::kReference);
	HInstruction* i = new (GetAllocator()) HParameterValue(graph_->GetDexFile(),
	dex::TypeIndex(1),
	1,
	DataType::Type::kInt32);
	HInstruction* j = new (GetAllocator()) HParameterValue(graph_->GetDexFile(),
	dex::TypeIndex(1),
	1,
	DataType::Type::kInt32);
	HInstruction* object = new (GetAllocator()) HParameterValue(graph_->GetDexFile(),
	dex::TypeIndex(0),
	0,
	DataType::Type::kReference);
	HInstruction* c0 = graph_->GetIntConstant(0);
	HInstruction* c1 = graph_->GetIntConstant(1);
	HInstruction* add0 = new (GetAllocator()) HAdd(DataType::Type::kInt32, i, c0);
	HInstruction* add1 = new (GetAllocator()) HAdd(DataType::Type::kInt32, i, c1);
	HInstruction* sub0 = new (GetAllocator()) HSub(DataType::Type::kInt32, i, c0);
	HInstruction* sub1 = new (GetAllocator()) HSub(DataType::Type::kInt32, i, c1);
	HInstruction* arr_set_0 =
	new (GetAllocator()) HArraySet(arr, c0, c0, DataType::Type::kInt32, 0);
	HInstruction* arr_set_1 =
	new (GetAllocator()) HArraySet(arr, c1, c0, DataType::Type::kInt32, 0);
	HInstruction* arr_set_i = new (GetAllocator()) HArraySet(arr, i, c0, DataType::Type::kInt32, 0);
	HInstruction* arr_set_add0 =
	new (GetAllocator()) HArraySet(arr, add0, c0, DataType::Type::kInt32, 0);
	HInstruction* arr_set_add1 =
	new (GetAllocator()) HArraySet(arr, add1, c0, DataType::Type::kInt32, 0);
	HInstruction* arr_set_sub0 =
	new (GetAllocator()) HArraySet(arr, sub0, c0, DataType::Type::kInt32, 0);
	HInstruction* arr_set_sub1 =
	new (GetAllocator()) HArraySet(arr, sub1, c0, DataType::Type::kInt32, 0);
	HInstruction* arr_set_j = new (GetAllocator()) HArraySet(arr, j, c0, DataType::Type::kInt32, 0);
	HInstanceFieldSet* set_field10 = new (GetAllocator()) HInstanceFieldSet(object,
	c1,
	nullptr,
	DataType::Type::kInt32,
	MemberOffset(10),
	false,
	kUnknownFieldIndex,
	kUnknownClassDefIndex,
	graph_->GetDexFile(),
	0);

	HInstruction* block_instructions[] = {arr,
	i,
	j,
	object,
	add0,
	add1,
	sub0,
	sub1,
	arr_set_0,
	arr_set_1,
	arr_set_i,
	arr_set_add0,
	arr_set_add1,
	arr_set_sub0,
	arr_set_sub1,
	arr_set_j,
	set_field10};

	for (HInstruction* instr : block_instructions) {
	entry->AddInstruction(instr);
	}

	HeapLocationCollector heap_location_collector(
	graph_, GetScopedAllocator(), LoadStoreAnalysisType::kBasic);
	heap_location_collector.VisitBasicBlock(entry);
	heap_location_collector.BuildAliasingMatrix();
	TestSchedulingGraph scheduling_graph(GetScopedAllocator(), &heap_location_collector);

	for (HInstruction* instr : ReverseRange(block_instructions)) {
	// Build scheduling graph with memory access aliasing information
	// from LSA/heap_location_collector.
	scheduling_graph.AddNode(instr);
	}

	// LSA/HeapLocationCollector should see those ArraySet instructions.
	ASSERT_EQ(heap_location_collector.GetNumberOfHeapLocations(), 9U);
	ASSERT_TRUE(heap_location_collector.HasHeapStores());

	// Test queries on HeapLocationCollector's aliasing matrix after load store analysis.
	// HeapLocationCollector and SchedulingGraph should report consistent relationships.
	size_t loc1 = HeapLocationCollector::kHeapLocationNotFound;
	size_t loc2 = HeapLocationCollector::kHeapLocationNotFound;

	// Test side effect dependency: array[0] and array[1]
	loc1 = heap_location_collector.GetArrayHeapLocation(arr_set_0);
	loc2 = heap_location_collector.GetArrayHeapLocation(arr_set_1);
	ASSERT_FALSE(heap_location_collector.MayAlias(loc1, loc2));
	ASSERT_FALSE(scheduling_graph.HasImmediateOtherDependency(arr_set_1, arr_set_0));

	// Test side effect dependency based on LSA analysis: array[i] and array[j]
	loc1 = heap_location_collector.GetArrayHeapLocation(arr_set_i);
	loc2 = heap_location_collector.GetArrayHeapLocation(arr_set_j);
	ASSERT_TRUE(heap_location_collector.MayAlias(loc1, loc2));
	// Unnecessary dependency is not stored, we rely on transitive dependencies.
	// The arr_set_j -> arr_set_sub0 -> arr_set_add0 -> arr_set_i dependencies are tested below.
	ASSERT_FALSE(scheduling_graph.HasImmediateOtherDependency(arr_set_j, arr_set_i));

	// Test side effect dependency based on LSA analysis: array[i] and array[i+0]
	loc1 = heap_location_collector.GetArrayHeapLocation(arr_set_i);
	loc2 = heap_location_collector.GetArrayHeapLocation(arr_set_add0);
	ASSERT_TRUE(heap_location_collector.MayAlias(loc1, loc2));
	ASSERT_TRUE(scheduling_graph.HasImmediateOtherDependency(arr_set_add0, arr_set_i));

	// Test side effect dependency based on LSA analysis: array[i] and array[i-0]
	loc1 = heap_location_collector.GetArrayHeapLocation(arr_set_i);
	loc2 = heap_location_collector.GetArrayHeapLocation(arr_set_sub0);
	ASSERT_TRUE(heap_location_collector.MayAlias(loc1, loc2));
	// Unnecessary dependency is not stored, we rely on transitive dependencies.
	ASSERT_FALSE(scheduling_graph.HasImmediateOtherDependency(arr_set_sub0, arr_set_i));
	// Instead, we rely on arr_set_sub0 -> arr_set_add0 -> arr_set_i, the latter is tested above.
	ASSERT_TRUE(scheduling_graph.HasImmediateOtherDependency(arr_set_sub0, arr_set_add0));

	// Test side effect dependency based on LSA analysis: array[i] and array[i+1]
	loc1 = heap_location_collector.GetArrayHeapLocation(arr_set_i);
	loc2 = heap_location_collector.GetArrayHeapLocation(arr_set_add1);
	ASSERT_FALSE(heap_location_collector.MayAlias(loc1, loc2));
	ASSERT_FALSE(scheduling_graph.HasImmediateOtherDependency(arr_set_add1, arr_set_i));

	// Test side effect dependency based on LSA analysis: array[i+1] and array[i-1]
	loc1 = heap_location_collector.GetArrayHeapLocation(arr_set_add1);
	loc2 = heap_location_collector.GetArrayHeapLocation(arr_set_sub1);
	ASSERT_FALSE(heap_location_collector.MayAlias(loc1, loc2));
	ASSERT_FALSE(scheduling_graph.HasImmediateOtherDependency(arr_set_sub1, arr_set_add1));

	// Test side effect dependency based on LSA analysis: array[j] and all others array accesses
	ASSERT_TRUE(scheduling_graph.HasImmediateOtherDependency(arr_set_j, arr_set_sub0));
	ASSERT_TRUE(scheduling_graph.HasImmediateOtherDependency(arr_set_j, arr_set_add1));
	ASSERT_TRUE(scheduling_graph.HasImmediateOtherDependency(arr_set_j, arr_set_sub1));
	// Unnecessary dependencies are not stored, we rely on transitive dependencies.
	ASSERT_FALSE(scheduling_graph.HasImmediateOtherDependency(arr_set_j, arr_set_i));
	ASSERT_FALSE(scheduling_graph.HasImmediateOtherDependency(arr_set_j, arr_set_add0));

	// Test that ArraySet and FieldSet should not have side effect dependency
	ASSERT_FALSE(scheduling_graph.HasImmediateOtherDependency(arr_set_i, set_field10));
	ASSERT_FALSE(scheduling_graph.HasImmediateOtherDependency(arr_set_j, set_field10));

	// Exercise target specific scheduler and SchedulingLatencyVisitor.
	scheduler->Schedule(graph_);
	}

	class TestSchedulingGraph : public SchedulingGraph {
	public:
	explicit TestSchedulingGraph(ScopedArenaAllocator* allocator,
	const HeapLocationCollector *heap_location_collector = nullptr)
	: SchedulingGraph(allocator, heap_location_collector) {}

	bool HasImmediateDataDependency(const HInstruction* instruction,
	const HInstruction* other_instruction) const {
	const SchedulingNode* node = GetNode(instruction);
	const SchedulingNode* other = GetNode(other_instruction);
	if (node == nullptr \|\| other == nullptr) {
	// Both instructions must be in current basic block, i.e. the SchedulingGraph can see their
	// corresponding SchedulingNode in the graph, and tell whether there is a dependency.
	// Otherwise there is no dependency from SchedulingGraph's perspective, for example,
	// instruction and other_instruction are in different basic blocks.
	return false;
	}
	return node->HasDataDependency(other);
	}

	bool HasImmediateOtherDependency(const HInstruction* instruction,
	const HInstruction* other_instruction) const {
	const SchedulingNode* node = GetNode(instruction);
	const SchedulingNode* other = GetNode(other_instruction);
	if (node == nullptr \|\| other == nullptr) {
	// Both instructions must be in current basic block, i.e. the SchedulingGraph can see their
	// corresponding SchedulingNode in the graph, and tell whether there is a dependency.
	// Otherwise there is no dependency from SchedulingGraph's perspective, for example,
	// instruction and other_instruction are in different basic blocks.
	return false;
	}
	return node->HasOtherDependency(other);
	}
	};

	HGraph* graph_;
	};

	#if defined(ART_ENABLE_CODEGEN_arm64)
	TEST_F(SchedulerTest, DependencyGraphAndSchedulerARM64) {
	CriticalPathSchedulingNodeSelector critical_path_selector;
	arm64::HSchedulerARM64 scheduler(&critical_path_selector);
	TestBuildDependencyGraphAndSchedule(&scheduler);
	}

	TEST_F(SchedulerTest, ArrayAccessAliasingARM64) {
	CriticalPathSchedulingNodeSelector critical_path_selector;
	arm64::HSchedulerARM64 scheduler(&critical_path_selector);
	TestDependencyGraphOnAliasingArrayAccesses(&scheduler);
	}
	#endif

	#if defined(ART_ENABLE_CODEGEN_arm)
	TEST_F(SchedulerTest, DependencyGraphAndSchedulerARM) {
	CriticalPathSchedulingNodeSelector critical_path_selector;
	arm::SchedulingLatencyVisitorARM arm_latency_visitor(/CodeGenerator/ nullptr);
	arm::HSchedulerARM scheduler(&critical_path_selector, &arm_latency_visitor);
	TestBuildDependencyGraphAndSchedule(&scheduler);
	}

	TEST_F(SchedulerTest, ArrayAccessAliasingARM) {
	CriticalPathSchedulingNodeSelector critical_path_selector;
	arm::SchedulingLatencyVisitorARM arm_latency_visitor(/CodeGenerator/ nullptr);
	arm::HSchedulerARM scheduler(&critical_path_selector, &arm_latency_visitor);
	TestDependencyGraphOnAliasingArrayAccesses(&scheduler);
	}
	#endif

	TEST_F(SchedulerTest, RandomScheduling) {
	//
	// Java source: crafted code to make sure (random) scheduling should get correct result.
	//
	// int result = 0;
	// float fr = 10.0f;
	// for (int i = 1; i < 10; i++) {
	// fr ++;
	// int t1 = result >> i;
	// int t2 = result * i;
	// result = result + t1 - t2;
	// fr = fr / i;
	// result += (int)fr;
	// }
	// return result;
	//
	const std::vector<uint16_t> data = SIX_REGISTERS_CODE_ITEM(
	Instruction::CONST_4 \| 0 << 12 \| 2 << 8, // const/4 v2, #int 0
	Instruction::CONST_HIGH16 \| 0 << 8, 0x4120, // const/high16 v0, #float 10.0 // #41200000
	Instruction::CONST_4 \| 1 << 12 \| 1 << 8, // const/4 v1, #int 1
	Instruction::CONST_16 \| 5 << 8, 0x000a, // const/16 v5, #int 10
	Instruction::IF_GE \| 5 << 12 \| 1 << 8, 0x0014, // if-ge v1, v5, 001a // +0014
	Instruction::CONST_HIGH16 \| 5 << 8, 0x3f80, // const/high16 v5, #float 1.0 // #3f800000
	Instruction::ADD_FLOAT_2ADDR \| 5 << 12 \| 0 << 8, // add-float/2addr v0, v5
	Instruction::SHR_INT \| 3 << 8, 1 << 8 \| 2 , // shr-int v3, v2, v1
	Instruction::MUL_INT \| 4 << 8, 1 << 8 \| 2, // mul-int v4, v2, v1
	Instruction::ADD_INT \| 5 << 8, 3 << 8 \| 2, // add-int v5, v2, v3
	Instruction::SUB_INT \| 2 << 8, 4 << 8 \| 5, // sub-int v2, v5, v4
	Instruction::INT_TO_FLOAT \| 1 << 12 \| 5 << 8, // int-to-float v5, v1
	Instruction::DIV_FLOAT_2ADDR \| 5 << 12 \| 0 << 8, // div-float/2addr v0, v5
	Instruction::FLOAT_TO_INT \| 0 << 12 \| 5 << 8, // float-to-int v5, v0
	Instruction::ADD_INT_2ADDR \| 5 << 12 \| 2 << 8, // add-int/2addr v2, v5
	Instruction::ADD_INT_LIT8 \| 1 << 8, 1 << 8 \| 1, // add-int/lit8 v1, v1, #int 1 // #01
	Instruction::GOTO \| 0xeb << 8, // goto 0004 // -0015
	Instruction::RETURN \| 2 << 8); // return v2

	constexpr int kNumberOfRuns = 10;
	for (int i = 0; i < kNumberOfRuns; ++i) {
	CompileWithRandomSchedulerAndRun(data, true, 138774);
	}
	}

	} // namespace art