| /* |
| * Copyright (C) 2017 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 "load_store_analysis.h" |
| #include "nodes.h" |
| #include "optimizing_unit_test.h" |
| |
| #include "gtest/gtest.h" |
| |
| namespace art { |
| |
| class LoadStoreAnalysisTest : public OptimizingUnitTest { |
| public: |
| LoadStoreAnalysisTest() : graph_(CreateGraph()) { } |
| |
| HGraph* graph_; |
| }; |
| |
| TEST_F(LoadStoreAnalysisTest, ArrayHeapLocations) { |
| HBasicBlock* entry = new (GetAllocator()) HBasicBlock(graph_); |
| graph_->AddBlock(entry); |
| graph_->SetEntryBlock(entry); |
| |
| // entry: |
| // array ParameterValue |
| // index ParameterValue |
| // c1 IntConstant |
| // c2 IntConstant |
| // c3 IntConstant |
| // array_get1 ArrayGet [array, c1] |
| // array_get2 ArrayGet [array, c2] |
| // array_set1 ArraySet [array, c1, c3] |
| // array_set2 ArraySet [array, index, c3] |
| HInstruction* array = new (GetAllocator()) HParameterValue( |
| graph_->GetDexFile(), dex::TypeIndex(0), 0, DataType::Type::kReference); |
| HInstruction* index = new (GetAllocator()) HParameterValue( |
| graph_->GetDexFile(), dex::TypeIndex(1), 1, DataType::Type::kInt32); |
| HInstruction* c1 = graph_->GetIntConstant(1); |
| HInstruction* c2 = graph_->GetIntConstant(2); |
| HInstruction* c3 = graph_->GetIntConstant(3); |
| HInstruction* array_get1 = new (GetAllocator()) HArrayGet(array, c1, DataType::Type::kInt32, 0); |
| HInstruction* array_get2 = new (GetAllocator()) HArrayGet(array, c2, DataType::Type::kInt32, 0); |
| HInstruction* array_set1 = |
| new (GetAllocator()) HArraySet(array, c1, c3, DataType::Type::kInt32, 0); |
| HInstruction* array_set2 = |
| new (GetAllocator()) HArraySet(array, index, c3, DataType::Type::kInt32, 0); |
| entry->AddInstruction(array); |
| entry->AddInstruction(index); |
| entry->AddInstruction(array_get1); |
| entry->AddInstruction(array_get2); |
| entry->AddInstruction(array_set1); |
| entry->AddInstruction(array_set2); |
| |
| // Test HeapLocationCollector initialization. |
| // Should be no heap locations, no operations on the heap. |
| HeapLocationCollector heap_location_collector(graph_); |
| ASSERT_EQ(heap_location_collector.GetNumberOfHeapLocations(), 0U); |
| ASSERT_FALSE(heap_location_collector.HasHeapStores()); |
| |
| // Test that after visiting the graph_, it must see following heap locations |
| // array[c1], array[c2], array[index]; and it should see heap stores. |
| heap_location_collector.VisitBasicBlock(entry); |
| ASSERT_EQ(heap_location_collector.GetNumberOfHeapLocations(), 3U); |
| ASSERT_TRUE(heap_location_collector.HasHeapStores()); |
| |
| // Test queries on HeapLocationCollector's ref info and index records. |
| ReferenceInfo* ref = heap_location_collector.FindReferenceInfoOf(array); |
| DataType::Type type = DataType::Type::kInt32; |
| size_t field = HeapLocation::kInvalidFieldOffset; |
| size_t vec = HeapLocation::kScalar; |
| size_t class_def = HeapLocation::kDeclaringClassDefIndexForArrays; |
| size_t loc1 = heap_location_collector.FindHeapLocationIndex( |
| ref, type, field, c1, vec, class_def); |
| size_t loc2 = heap_location_collector.FindHeapLocationIndex( |
| ref, type, field, c2, vec, class_def); |
| size_t loc3 = heap_location_collector.FindHeapLocationIndex( |
| ref, type, field, index, vec, class_def); |
| // must find this reference info for array in HeapLocationCollector. |
| ASSERT_TRUE(ref != nullptr); |
| // must find these heap locations; |
| // and array[1], array[2], array[3] should be different heap locations. |
| ASSERT_TRUE(loc1 != HeapLocationCollector::kHeapLocationNotFound); |
| ASSERT_TRUE(loc2 != HeapLocationCollector::kHeapLocationNotFound); |
| ASSERT_TRUE(loc3 != HeapLocationCollector::kHeapLocationNotFound); |
| ASSERT_TRUE(loc1 != loc2); |
| ASSERT_TRUE(loc2 != loc3); |
| ASSERT_TRUE(loc1 != loc3); |
| |
| // Test alias relationships after building aliasing matrix. |
| // array[1] and array[2] clearly should not alias; |
| // array[index] should alias with the others, because index is an unknow value. |
| heap_location_collector.BuildAliasingMatrix(); |
| ASSERT_FALSE(heap_location_collector.MayAlias(loc1, loc2)); |
| ASSERT_TRUE(heap_location_collector.MayAlias(loc1, loc3)); |
| ASSERT_TRUE(heap_location_collector.MayAlias(loc1, loc3)); |
| } |
| |
| TEST_F(LoadStoreAnalysisTest, FieldHeapLocations) { |
| HBasicBlock* entry = new (GetAllocator()) HBasicBlock(graph_); |
| graph_->AddBlock(entry); |
| graph_->SetEntryBlock(entry); |
| |
| // entry: |
| // object ParameterValue |
| // c1 IntConstant |
| // set_field10 InstanceFieldSet [object, c1, 10] |
| // get_field10 InstanceFieldGet [object, 10] |
| // get_field20 InstanceFieldGet [object, 20] |
| |
| HInstruction* c1 = graph_->GetIntConstant(1); |
| HInstruction* object = new (GetAllocator()) HParameterValue(graph_->GetDexFile(), |
| dex::TypeIndex(0), |
| 0, |
| DataType::Type::kReference); |
| HInstanceFieldSet* set_field10 = new (GetAllocator()) HInstanceFieldSet(object, |
| c1, |
| nullptr, |
| DataType::Type::kInt32, |
| MemberOffset(10), |
| false, |
| kUnknownFieldIndex, |
| kUnknownClassDefIndex, |
| graph_->GetDexFile(), |
| 0); |
| HInstanceFieldGet* get_field10 = new (GetAllocator()) HInstanceFieldGet(object, |
| nullptr, |
| DataType::Type::kInt32, |
| MemberOffset(10), |
| false, |
| kUnknownFieldIndex, |
| kUnknownClassDefIndex, |
| graph_->GetDexFile(), |
| 0); |
| HInstanceFieldGet* get_field20 = new (GetAllocator()) HInstanceFieldGet(object, |
| nullptr, |
| DataType::Type::kInt32, |
| MemberOffset(20), |
| false, |
| kUnknownFieldIndex, |
| kUnknownClassDefIndex, |
| graph_->GetDexFile(), |
| 0); |
| entry->AddInstruction(object); |
| entry->AddInstruction(set_field10); |
| entry->AddInstruction(get_field10); |
| entry->AddInstruction(get_field20); |
| |
| // Test HeapLocationCollector initialization. |
| // Should be no heap locations, no operations on the heap. |
| HeapLocationCollector heap_location_collector(graph_); |
| ASSERT_EQ(heap_location_collector.GetNumberOfHeapLocations(), 0U); |
| ASSERT_FALSE(heap_location_collector.HasHeapStores()); |
| |
| // Test that after visiting the graph, it must see following heap locations |
| // object.field10, object.field20 and it should see heap stores. |
| heap_location_collector.VisitBasicBlock(entry); |
| ASSERT_EQ(heap_location_collector.GetNumberOfHeapLocations(), 2U); |
| ASSERT_TRUE(heap_location_collector.HasHeapStores()); |
| |
| // Test queries on HeapLocationCollector's ref info and index records. |
| ReferenceInfo* ref = heap_location_collector.FindReferenceInfoOf(object); |
| size_t loc1 = heap_location_collector.GetFieldHeapLocation(object, &get_field10->GetFieldInfo()); |
| size_t loc2 = heap_location_collector.GetFieldHeapLocation(object, &get_field20->GetFieldInfo()); |
| // must find references info for object and in HeapLocationCollector. |
| ASSERT_TRUE(ref != nullptr); |
| // must find these heap locations. |
| ASSERT_TRUE(loc1 != HeapLocationCollector::kHeapLocationNotFound); |
| ASSERT_TRUE(loc2 != HeapLocationCollector::kHeapLocationNotFound); |
| // different fields of same object. |
| ASSERT_TRUE(loc1 != loc2); |
| // accesses to different fields of the same object should not alias. |
| ASSERT_FALSE(heap_location_collector.MayAlias(loc1, loc2)); |
| } |
| |
| TEST_F(LoadStoreAnalysisTest, ArrayIndexAliasingTest) { |
| HBasicBlock* entry = new (GetAllocator()) HBasicBlock(graph_); |
| graph_->AddBlock(entry); |
| graph_->SetEntryBlock(entry); |
| graph_->BuildDominatorTree(); |
| |
| HInstruction* array = new (GetAllocator()) HParameterValue( |
| graph_->GetDexFile(), dex::TypeIndex(0), 0, DataType::Type::kReference); |
| HInstruction* index = new (GetAllocator()) HParameterValue( |
| graph_->GetDexFile(), dex::TypeIndex(1), 1, DataType::Type::kInt32); |
| HInstruction* c0 = graph_->GetIntConstant(0); |
| HInstruction* c1 = graph_->GetIntConstant(1); |
| HInstruction* c_neg1 = graph_->GetIntConstant(-1); |
| HInstruction* add0 = new (GetAllocator()) HAdd(DataType::Type::kInt32, index, c0); |
| HInstruction* add1 = new (GetAllocator()) HAdd(DataType::Type::kInt32, index, c1); |
| HInstruction* sub0 = new (GetAllocator()) HSub(DataType::Type::kInt32, index, c0); |
| HInstruction* sub1 = new (GetAllocator()) HSub(DataType::Type::kInt32, index, c1); |
| HInstruction* sub_neg1 = new (GetAllocator()) HSub(DataType::Type::kInt32, index, c_neg1); |
| HInstruction* rev_sub1 = new (GetAllocator()) HSub(DataType::Type::kInt32, c1, index); |
| HInstruction* arr_set1 = new (GetAllocator()) HArraySet(array, c0, c0, DataType::Type::kInt32, 0); |
| HInstruction* arr_set2 = new (GetAllocator()) HArraySet(array, c1, c0, DataType::Type::kInt32, 0); |
| HInstruction* arr_set3 = |
| new (GetAllocator()) HArraySet(array, add0, c0, DataType::Type::kInt32, 0); |
| HInstruction* arr_set4 = |
| new (GetAllocator()) HArraySet(array, add1, c0, DataType::Type::kInt32, 0); |
| HInstruction* arr_set5 = |
| new (GetAllocator()) HArraySet(array, sub0, c0, DataType::Type::kInt32, 0); |
| HInstruction* arr_set6 = |
| new (GetAllocator()) HArraySet(array, sub1, c0, DataType::Type::kInt32, 0); |
| HInstruction* arr_set7 = |
| new (GetAllocator()) HArraySet(array, rev_sub1, c0, DataType::Type::kInt32, 0); |
| HInstruction* arr_set8 = |
| new (GetAllocator()) HArraySet(array, sub_neg1, c0, DataType::Type::kInt32, 0); |
| |
| entry->AddInstruction(array); |
| entry->AddInstruction(index); |
| entry->AddInstruction(add0); |
| entry->AddInstruction(add1); |
| entry->AddInstruction(sub0); |
| entry->AddInstruction(sub1); |
| entry->AddInstruction(sub_neg1); |
| entry->AddInstruction(rev_sub1); |
| |
| entry->AddInstruction(arr_set1); // array[0] = c0 |
| entry->AddInstruction(arr_set2); // array[1] = c0 |
| entry->AddInstruction(arr_set3); // array[i+0] = c0 |
| entry->AddInstruction(arr_set4); // array[i+1] = c0 |
| entry->AddInstruction(arr_set5); // array[i-0] = c0 |
| entry->AddInstruction(arr_set6); // array[i-1] = c0 |
| entry->AddInstruction(arr_set7); // array[1-i] = c0 |
| entry->AddInstruction(arr_set8); // array[i-(-1)] = c0 |
| |
| LoadStoreAnalysis lsa(graph_); |
| lsa.Run(); |
| const HeapLocationCollector& heap_location_collector = lsa.GetHeapLocationCollector(); |
| |
| // LSA/HeapLocationCollector should see those ArrayGet instructions. |
| ASSERT_EQ(heap_location_collector.GetNumberOfHeapLocations(), 8U); |
| ASSERT_TRUE(heap_location_collector.HasHeapStores()); |
| |
| // Test queries on HeapLocationCollector's aliasing matrix after load store analysis. |
| size_t loc1 = HeapLocationCollector::kHeapLocationNotFound; |
| size_t loc2 = HeapLocationCollector::kHeapLocationNotFound; |
| |
| // Test alias: array[0] and array[1] |
| loc1 = heap_location_collector.GetArrayHeapLocation(arr_set1); |
| loc2 = heap_location_collector.GetArrayHeapLocation(arr_set2); |
| ASSERT_FALSE(heap_location_collector.MayAlias(loc1, loc2)); |
| |
| // Test alias: array[i+0] and array[i-0] |
| loc1 = heap_location_collector.GetArrayHeapLocation(arr_set3); |
| loc2 = heap_location_collector.GetArrayHeapLocation(arr_set5); |
| ASSERT_TRUE(heap_location_collector.MayAlias(loc1, loc2)); |
| |
| // Test alias: array[i+1] and array[i-1] |
| loc1 = heap_location_collector.GetArrayHeapLocation(arr_set4); |
| loc2 = heap_location_collector.GetArrayHeapLocation(arr_set6); |
| ASSERT_FALSE(heap_location_collector.MayAlias(loc1, loc2)); |
| |
| // Test alias: array[i+1] and array[1-i] |
| loc1 = heap_location_collector.GetArrayHeapLocation(arr_set4); |
| loc2 = heap_location_collector.GetArrayHeapLocation(arr_set7); |
| ASSERT_TRUE(heap_location_collector.MayAlias(loc1, loc2)); |
| |
| // Test alias: array[i+1] and array[i-(-1)] |
| loc1 = heap_location_collector.GetArrayHeapLocation(arr_set4); |
| loc2 = heap_location_collector.GetArrayHeapLocation(arr_set8); |
| ASSERT_TRUE(heap_location_collector.MayAlias(loc1, loc2)); |
| } |
| |
| TEST_F(LoadStoreAnalysisTest, ArrayAliasingTest) { |
| HBasicBlock* entry = new (GetAllocator()) HBasicBlock(graph_); |
| graph_->AddBlock(entry); |
| graph_->SetEntryBlock(entry); |
| graph_->BuildDominatorTree(); |
| |
| HInstruction* array = new (GetAllocator()) HParameterValue( |
| graph_->GetDexFile(), dex::TypeIndex(0), 0, DataType::Type::kReference); |
| HInstruction* index = new (GetAllocator()) HParameterValue( |
| graph_->GetDexFile(), dex::TypeIndex(1), 1, DataType::Type::kInt32); |
| HInstruction* c0 = graph_->GetIntConstant(0); |
| HInstruction* c1 = graph_->GetIntConstant(1); |
| HInstruction* c6 = graph_->GetIntConstant(6); |
| HInstruction* c8 = graph_->GetIntConstant(8); |
| |
| HInstruction* arr_set_0 = new (GetAllocator()) HArraySet(array, |
| c0, |
| c0, |
| DataType::Type::kInt32, |
| 0); |
| HInstruction* arr_set_1 = new (GetAllocator()) HArraySet(array, |
| c1, |
| c0, |
| DataType::Type::kInt32, |
| 0); |
| HInstruction* arr_set_i = new (GetAllocator()) HArraySet(array, |
| index, |
| c0, |
| DataType::Type::kInt32, |
| 0); |
| |
| HVecOperation* v1 = new (GetAllocator()) HVecReplicateScalar(GetAllocator(), |
| c1, |
| DataType::Type::kInt32, |
| 4, |
| kNoDexPc); |
| HVecOperation* v2 = new (GetAllocator()) HVecReplicateScalar(GetAllocator(), |
| c1, |
| DataType::Type::kInt32, |
| 2, |
| kNoDexPc); |
| HInstruction* i_add6 = new (GetAllocator()) HAdd(DataType::Type::kInt32, index, c6); |
| HInstruction* i_add8 = new (GetAllocator()) HAdd(DataType::Type::kInt32, index, c8); |
| |
| HInstruction* vstore_0 = new (GetAllocator()) HVecStore( |
| GetAllocator(), |
| array, |
| c0, |
| v1, |
| DataType::Type::kInt32, |
| SideEffects::ArrayWriteOfType(DataType::Type::kInt32), |
| 4, |
| kNoDexPc); |
| HInstruction* vstore_1 = new (GetAllocator()) HVecStore( |
| GetAllocator(), |
| array, |
| c1, |
| v1, |
| DataType::Type::kInt32, |
| SideEffects::ArrayWriteOfType(DataType::Type::kInt32), |
| 4, |
| kNoDexPc); |
| HInstruction* vstore_8 = new (GetAllocator()) HVecStore( |
| GetAllocator(), |
| array, |
| c8, |
| v1, |
| DataType::Type::kInt32, |
| SideEffects::ArrayWriteOfType(DataType::Type::kInt32), |
| 4, |
| kNoDexPc); |
| HInstruction* vstore_i = new (GetAllocator()) HVecStore( |
| GetAllocator(), |
| array, |
| index, |
| v1, |
| DataType::Type::kInt32, |
| SideEffects::ArrayWriteOfType(DataType::Type::kInt32), |
| 4, |
| kNoDexPc); |
| HInstruction* vstore_i_add6 = new (GetAllocator()) HVecStore( |
| GetAllocator(), |
| array, |
| i_add6, |
| v1, |
| DataType::Type::kInt32, |
| SideEffects::ArrayWriteOfType(DataType::Type::kInt32), |
| 4, |
| kNoDexPc); |
| HInstruction* vstore_i_add8 = new (GetAllocator()) HVecStore( |
| GetAllocator(), |
| array, |
| i_add8, |
| v1, |
| DataType::Type::kInt32, |
| SideEffects::ArrayWriteOfType(DataType::Type::kInt32), |
| 4, |
| kNoDexPc); |
| HInstruction* vstore_i_add6_vlen2 = new (GetAllocator()) HVecStore( |
| GetAllocator(), |
| array, |
| i_add6, |
| v2, |
| DataType::Type::kInt32, |
| SideEffects::ArrayWriteOfType(DataType::Type::kInt32), |
| 2, |
| kNoDexPc); |
| |
| entry->AddInstruction(array); |
| entry->AddInstruction(index); |
| |
| entry->AddInstruction(arr_set_0); |
| entry->AddInstruction(arr_set_1); |
| entry->AddInstruction(arr_set_i); |
| entry->AddInstruction(v1); |
| entry->AddInstruction(v2); |
| entry->AddInstruction(i_add6); |
| entry->AddInstruction(i_add8); |
| entry->AddInstruction(vstore_0); |
| entry->AddInstruction(vstore_1); |
| entry->AddInstruction(vstore_8); |
| entry->AddInstruction(vstore_i); |
| entry->AddInstruction(vstore_i_add6); |
| entry->AddInstruction(vstore_i_add8); |
| entry->AddInstruction(vstore_i_add6_vlen2); |
| |
| LoadStoreAnalysis lsa(graph_); |
| lsa.Run(); |
| const HeapLocationCollector& heap_location_collector = lsa.GetHeapLocationCollector(); |
| |
| // LSA/HeapLocationCollector should see those instructions. |
| ASSERT_EQ(heap_location_collector.GetNumberOfHeapLocations(), 10U); |
| ASSERT_TRUE(heap_location_collector.HasHeapStores()); |
| |
| // Test queries on HeapLocationCollector's aliasing matrix after load store analysis. |
| size_t loc1, loc2; |
| |
| // Test alias: array[0] and array[0,1,2,3] |
| loc1 = heap_location_collector.GetArrayHeapLocation(arr_set_0); |
| loc2 = heap_location_collector.GetArrayHeapLocation(vstore_0); |
| ASSERT_TRUE(heap_location_collector.MayAlias(loc1, loc2)); |
| |
| // Test alias: array[0] and array[1,2,3,4] |
| loc1 = heap_location_collector.GetArrayHeapLocation(arr_set_0); |
| loc2 = heap_location_collector.GetArrayHeapLocation(vstore_1); |
| ASSERT_FALSE(heap_location_collector.MayAlias(loc1, loc2)); |
| |
| // Test alias: array[0] and array[8,9,10,11] |
| loc1 = heap_location_collector.GetArrayHeapLocation(arr_set_0); |
| loc2 = heap_location_collector.GetArrayHeapLocation(vstore_8); |
| ASSERT_FALSE(heap_location_collector.MayAlias(loc1, loc2)); |
| |
| // Test alias: array[1] and array[8,9,10,11] |
| loc1 = heap_location_collector.GetArrayHeapLocation(arr_set_1); |
| loc2 = heap_location_collector.GetArrayHeapLocation(vstore_8); |
| ASSERT_FALSE(heap_location_collector.MayAlias(loc1, loc2)); |
| |
| // Test alias: array[1] and array[0,1,2,3] |
| loc1 = heap_location_collector.GetArrayHeapLocation(arr_set_1); |
| loc2 = heap_location_collector.GetArrayHeapLocation(vstore_0); |
| ASSERT_TRUE(heap_location_collector.MayAlias(loc1, loc2)); |
| |
| // Test alias: array[0,1,2,3] and array[8,9,10,11] |
| loc1 = heap_location_collector.GetArrayHeapLocation(vstore_0); |
| loc2 = heap_location_collector.GetArrayHeapLocation(vstore_8); |
| ASSERT_FALSE(heap_location_collector.MayAlias(loc1, loc2)); |
| |
| // Test alias: array[0,1,2,3] and array[1,2,3,4] |
| loc1 = heap_location_collector.GetArrayHeapLocation(vstore_0); |
| loc2 = heap_location_collector.GetArrayHeapLocation(vstore_1); |
| ASSERT_TRUE(heap_location_collector.MayAlias(loc1, loc2)); |
| |
| // Test alias: array[0] and array[i,i+1,i+2,i+3] |
| loc1 = heap_location_collector.GetArrayHeapLocation(arr_set_0); |
| loc2 = heap_location_collector.GetArrayHeapLocation(vstore_i); |
| ASSERT_TRUE(heap_location_collector.MayAlias(loc1, loc2)); |
| |
| // Test alias: array[i] and array[0,1,2,3] |
| loc1 = heap_location_collector.GetArrayHeapLocation(arr_set_i); |
| loc2 = heap_location_collector.GetArrayHeapLocation(vstore_0); |
| ASSERT_TRUE(heap_location_collector.MayAlias(loc1, loc2)); |
| |
| // Test alias: array[i] and array[i,i+1,i+2,i+3] |
| loc1 = heap_location_collector.GetArrayHeapLocation(arr_set_i); |
| loc2 = heap_location_collector.GetArrayHeapLocation(vstore_i); |
| ASSERT_TRUE(heap_location_collector.MayAlias(loc1, loc2)); |
| |
| // Test alias: array[i] and array[i+8,i+9,i+10,i+11] |
| loc1 = heap_location_collector.GetArrayHeapLocation(arr_set_i); |
| loc2 = heap_location_collector.GetArrayHeapLocation(vstore_i_add8); |
| ASSERT_FALSE(heap_location_collector.MayAlias(loc1, loc2)); |
| |
| // Test alias: array[i+6,i+7,i+8,i+9] and array[i+8,i+9,i+10,i+11] |
| // Test partial overlap. |
| loc1 = heap_location_collector.GetArrayHeapLocation(vstore_i_add6); |
| loc2 = heap_location_collector.GetArrayHeapLocation(vstore_i_add8); |
| ASSERT_TRUE(heap_location_collector.MayAlias(loc1, loc2)); |
| |
| // Test alias: array[i+6,i+7] and array[i,i+1,i+2,i+3] |
| // Test different vector lengths. |
| loc1 = heap_location_collector.GetArrayHeapLocation(vstore_i_add6_vlen2); |
| loc2 = heap_location_collector.GetArrayHeapLocation(vstore_i); |
| ASSERT_FALSE(heap_location_collector.MayAlias(loc1, loc2)); |
| |
| // Test alias: array[i+6,i+7] and array[i+8,i+9,i+10,i+11] |
| loc1 = heap_location_collector.GetArrayHeapLocation(vstore_i_add6_vlen2); |
| loc2 = heap_location_collector.GetArrayHeapLocation(vstore_i_add8); |
| ASSERT_FALSE(heap_location_collector.MayAlias(loc1, loc2)); |
| } |
| |
| TEST_F(LoadStoreAnalysisTest, ArrayIndexCalculationOverflowTest) { |
| HBasicBlock* entry = new (GetAllocator()) HBasicBlock(graph_); |
| graph_->AddBlock(entry); |
| graph_->SetEntryBlock(entry); |
| graph_->BuildDominatorTree(); |
| |
| HInstruction* array = new (GetAllocator()) HParameterValue( |
| graph_->GetDexFile(), dex::TypeIndex(0), 0, DataType::Type::kReference); |
| HInstruction* index = new (GetAllocator()) HParameterValue( |
| graph_->GetDexFile(), dex::TypeIndex(1), 1, DataType::Type::kInt32); |
| |
| HInstruction* c0 = graph_->GetIntConstant(0); |
| HInstruction* c_0x80000000 = graph_->GetIntConstant(0x80000000); |
| HInstruction* c_0x10 = graph_->GetIntConstant(0x10); |
| HInstruction* c_0xFFFFFFF0 = graph_->GetIntConstant(0xFFFFFFF0); |
| HInstruction* c_0x7FFFFFFF = graph_->GetIntConstant(0x7FFFFFFF); |
| HInstruction* c_0x80000001 = graph_->GetIntConstant(0x80000001); |
| |
| // `index+0x80000000` and `index-0x80000000` array indices MAY alias. |
| HInstruction* add_0x80000000 = new (GetAllocator()) HAdd( |
| DataType::Type::kInt32, index, c_0x80000000); |
| HInstruction* sub_0x80000000 = new (GetAllocator()) HSub( |
| DataType::Type::kInt32, index, c_0x80000000); |
| HInstruction* arr_set_1 = new (GetAllocator()) HArraySet( |
| array, add_0x80000000, c0, DataType::Type::kInt32, 0); |
| HInstruction* arr_set_2 = new (GetAllocator()) HArraySet( |
| array, sub_0x80000000, c0, DataType::Type::kInt32, 0); |
| |
| // `index+0x10` and `index-0xFFFFFFF0` array indices MAY alias. |
| HInstruction* add_0x10 = new (GetAllocator()) HAdd(DataType::Type::kInt32, index, c_0x10); |
| HInstruction* sub_0xFFFFFFF0 = new (GetAllocator()) HSub( |
| DataType::Type::kInt32, index, c_0xFFFFFFF0); |
| HInstruction* arr_set_3 = new (GetAllocator()) HArraySet( |
| array, add_0x10, c0, DataType::Type::kInt32, 0); |
| HInstruction* arr_set_4 = new (GetAllocator()) HArraySet( |
| array, sub_0xFFFFFFF0, c0, DataType::Type::kInt32, 0); |
| |
| // `index+0x7FFFFFFF` and `index-0x80000001` array indices MAY alias. |
| HInstruction* add_0x7FFFFFFF = new (GetAllocator()) HAdd( |
| DataType::Type::kInt32, index, c_0x7FFFFFFF); |
| HInstruction* sub_0x80000001 = new (GetAllocator()) HSub( |
| DataType::Type::kInt32, index, c_0x80000001); |
| HInstruction* arr_set_5 = new (GetAllocator()) HArraySet( |
| array, add_0x7FFFFFFF, c0, DataType::Type::kInt32, 0); |
| HInstruction* arr_set_6 = new (GetAllocator()) HArraySet( |
| array, sub_0x80000001, c0, DataType::Type::kInt32, 0); |
| |
| // `index+0` and `index-0` array indices MAY alias. |
| HInstruction* add_0 = new (GetAllocator()) HAdd(DataType::Type::kInt32, index, c0); |
| HInstruction* sub_0 = new (GetAllocator()) HSub(DataType::Type::kInt32, index, c0); |
| HInstruction* arr_set_7 = new (GetAllocator()) HArraySet( |
| array, add_0, c0, DataType::Type::kInt32, 0); |
| HInstruction* arr_set_8 = new (GetAllocator()) HArraySet( |
| array, sub_0, c0, DataType::Type::kInt32, 0); |
| |
| entry->AddInstruction(array); |
| entry->AddInstruction(index); |
| entry->AddInstruction(add_0x80000000); |
| entry->AddInstruction(sub_0x80000000); |
| entry->AddInstruction(add_0x10); |
| entry->AddInstruction(sub_0xFFFFFFF0); |
| entry->AddInstruction(add_0x7FFFFFFF); |
| entry->AddInstruction(sub_0x80000001); |
| entry->AddInstruction(add_0); |
| entry->AddInstruction(sub_0); |
| entry->AddInstruction(arr_set_1); |
| entry->AddInstruction(arr_set_2); |
| entry->AddInstruction(arr_set_3); |
| entry->AddInstruction(arr_set_4); |
| entry->AddInstruction(arr_set_5); |
| entry->AddInstruction(arr_set_6); |
| entry->AddInstruction(arr_set_7); |
| entry->AddInstruction(arr_set_8); |
| |
| LoadStoreAnalysis lsa(graph_); |
| lsa.Run(); |
| const HeapLocationCollector& heap_location_collector = lsa.GetHeapLocationCollector(); |
| |
| // LSA/HeapLocationCollector should see those ArrayGet instructions. |
| ASSERT_EQ(heap_location_collector.GetNumberOfHeapLocations(), 8U); |
| ASSERT_TRUE(heap_location_collector.HasHeapStores()); |
| |
| // Test queries on HeapLocationCollector's aliasing matrix after load store analysis. |
| size_t loc1 = HeapLocationCollector::kHeapLocationNotFound; |
| size_t loc2 = HeapLocationCollector::kHeapLocationNotFound; |
| |
| // Test alias: array[i+0x80000000] and array[i-0x80000000] |
| loc1 = heap_location_collector.GetArrayHeapLocation(arr_set_1); |
| loc2 = heap_location_collector.GetArrayHeapLocation(arr_set_2); |
| ASSERT_TRUE(heap_location_collector.MayAlias(loc1, loc2)); |
| |
| // Test alias: array[i+0x10] and array[i-0xFFFFFFF0] |
| loc1 = heap_location_collector.GetArrayHeapLocation(arr_set_3); |
| loc2 = heap_location_collector.GetArrayHeapLocation(arr_set_4); |
| ASSERT_TRUE(heap_location_collector.MayAlias(loc1, loc2)); |
| |
| // Test alias: array[i+0x7FFFFFFF] and array[i-0x80000001] |
| loc1 = heap_location_collector.GetArrayHeapLocation(arr_set_5); |
| loc2 = heap_location_collector.GetArrayHeapLocation(arr_set_6); |
| ASSERT_TRUE(heap_location_collector.MayAlias(loc1, loc2)); |
| |
| // Test alias: array[i+0] and array[i-0] |
| loc1 = heap_location_collector.GetArrayHeapLocation(arr_set_7); |
| loc2 = heap_location_collector.GetArrayHeapLocation(arr_set_8); |
| ASSERT_TRUE(heap_location_collector.MayAlias(loc1, loc2)); |
| |
| // Should not alias: |
| loc1 = heap_location_collector.GetArrayHeapLocation(arr_set_2); |
| loc2 = heap_location_collector.GetArrayHeapLocation(arr_set_6); |
| ASSERT_FALSE(heap_location_collector.MayAlias(loc1, loc2)); |
| |
| // Should not alias: |
| loc1 = heap_location_collector.GetArrayHeapLocation(arr_set_7); |
| loc2 = heap_location_collector.GetArrayHeapLocation(arr_set_2); |
| ASSERT_FALSE(heap_location_collector.MayAlias(loc1, loc2)); |
| } |
| |
| TEST_F(LoadStoreAnalysisTest, TestHuntOriginalRef) { |
| HBasicBlock* entry = new (GetAllocator()) HBasicBlock(graph_); |
| graph_->AddBlock(entry); |
| graph_->SetEntryBlock(entry); |
| |
| // Different ways where orignal array reference are transformed & passed to ArrayGet. |
| // ParameterValue --> ArrayGet |
| // ParameterValue --> BoundType --> ArrayGet |
| // ParameterValue --> BoundType --> NullCheck --> ArrayGet |
| // ParameterValue --> BoundType --> NullCheck --> IntermediateAddress --> ArrayGet |
| HInstruction* c1 = graph_->GetIntConstant(1); |
| HInstruction* array = new (GetAllocator()) HParameterValue(graph_->GetDexFile(), |
| dex::TypeIndex(0), |
| 0, |
| DataType::Type::kReference); |
| HInstruction* array_get1 = new (GetAllocator()) HArrayGet(array, |
| c1, |
| DataType::Type::kInt32, |
| 0); |
| |
| HInstruction* bound_type = new (GetAllocator()) HBoundType(array); |
| HInstruction* array_get2 = new (GetAllocator()) HArrayGet(bound_type, |
| c1, |
| DataType::Type::kInt32, |
| 0); |
| |
| HInstruction* null_check = new (GetAllocator()) HNullCheck(bound_type, 0); |
| HInstruction* array_get3 = new (GetAllocator()) HArrayGet(null_check, |
| c1, |
| DataType::Type::kInt32, |
| 0); |
| |
| HInstruction* inter_addr = new (GetAllocator()) HIntermediateAddress(null_check, c1, 0); |
| HInstruction* array_get4 = new (GetAllocator()) HArrayGet(inter_addr, |
| c1, |
| DataType::Type::kInt32, |
| 0); |
| entry->AddInstruction(array); |
| entry->AddInstruction(array_get1); |
| entry->AddInstruction(bound_type); |
| entry->AddInstruction(array_get2); |
| entry->AddInstruction(null_check); |
| entry->AddInstruction(array_get3); |
| entry->AddInstruction(inter_addr); |
| entry->AddInstruction(array_get4); |
| |
| HeapLocationCollector heap_location_collector(graph_); |
| heap_location_collector.VisitBasicBlock(entry); |
| |
| // Test that the HeapLocationCollector should be able to tell |
| // that there is only ONE array location, no matter how many |
| // times the original reference has been transformed by BoundType, |
| // NullCheck, IntermediateAddress, etc. |
| ASSERT_EQ(heap_location_collector.GetNumberOfHeapLocations(), 1U); |
| size_t loc1 = heap_location_collector.GetArrayHeapLocation(array_get1); |
| size_t loc2 = heap_location_collector.GetArrayHeapLocation(array_get2); |
| size_t loc3 = heap_location_collector.GetArrayHeapLocation(array_get3); |
| size_t loc4 = heap_location_collector.GetArrayHeapLocation(array_get4); |
| ASSERT_TRUE(loc1 != HeapLocationCollector::kHeapLocationNotFound); |
| ASSERT_EQ(loc1, loc2); |
| ASSERT_EQ(loc1, loc3); |
| ASSERT_EQ(loc1, loc4); |
| } |
| |
| } // namespace art |