| /* |
| * Copyright (C) 2012 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 "local_value_numbering.h" |
| |
| #include "mir_field_info.h" |
| #include "mir_graph.h" |
| |
| namespace art { |
| |
| uint16_t LocalValueNumbering::GetFieldId(const DexFile* dex_file, uint16_t field_idx) { |
| FieldReference key = { dex_file, field_idx }; |
| auto it = field_index_map_.find(key); |
| if (it != field_index_map_.end()) { |
| return it->second; |
| } |
| uint16_t id = field_index_map_.size(); |
| field_index_map_.Put(key, id); |
| return id; |
| } |
| |
| void LocalValueNumbering::AdvanceGlobalMemory() { |
| // See AdvanceMemoryVersion() for explanation. |
| global_memory_version_ = next_memory_version_; |
| ++next_memory_version_; |
| } |
| |
| uint16_t LocalValueNumbering::GetMemoryVersion(uint16_t base, uint16_t field, uint16_t type) { |
| // See AdvanceMemoryVersion() for explanation. |
| MemoryVersionKey key = { base, field, type }; |
| MemoryVersionMap::iterator it = memory_version_map_.find(key); |
| uint16_t memory_version = (it != memory_version_map_.end()) ? it->second : 0u; |
| if (base != NO_VALUE && non_aliasing_refs_.find(base) == non_aliasing_refs_.end()) { |
| // Check modifications by potentially aliased access. |
| MemoryVersionKey aliased_access_key = { NO_VALUE, field, type }; |
| auto aa_it = memory_version_map_.find(aliased_access_key); |
| if (aa_it != memory_version_map_.end() && aa_it->second > memory_version) { |
| memory_version = aa_it->second; |
| } |
| memory_version = std::max(memory_version, global_memory_version_); |
| } else if (base != NO_VALUE) { |
| // Ignore global_memory_version_ for access via unique references. |
| } else { |
| memory_version = std::max(memory_version, global_memory_version_); |
| } |
| return memory_version; |
| }; |
| |
| uint16_t LocalValueNumbering::AdvanceMemoryVersion(uint16_t base, uint16_t field, uint16_t type) { |
| // When we read the same value from memory, we want to assign the same value name to it. |
| // However, we need to be careful not to assign the same value name if the memory location |
| // may have been written to between the reads. To avoid that we do "memory versioning". |
| // |
| // For each write to a memory location (instance field, static field, array element) we assign |
| // a new memory version number to the location identified by the value name of the base register, |
| // the field id and type, or "{ base, field, type }". For static fields the "base" is NO_VALUE |
| // since they are not accessed via a reference. For arrays the "field" is NO_VALUE since they |
| // don't have a field id. |
| // |
| // To account for the possibility of aliased access to the same memory location via different |
| // "base", we also store the memory version number with the key "{ NO_VALUE, field, type }" |
| // if "base" is an aliasing reference and check it in GetMemoryVersion() on reads via |
| // aliasing references. A global memory version is set for method calls as a method can |
| // potentially write to any memory location accessed via an aliasing reference. |
| |
| uint16_t result = next_memory_version_; |
| ++next_memory_version_; |
| MemoryVersionKey key = { base, field, type }; |
| memory_version_map_.Overwrite(key, result); |
| if (base != NO_VALUE && non_aliasing_refs_.find(base) == non_aliasing_refs_.end()) { |
| // Advance memory version for aliased access. |
| MemoryVersionKey aliased_access_key = { NO_VALUE, field, type }; |
| memory_version_map_.Overwrite(aliased_access_key, result); |
| } |
| return result; |
| }; |
| |
| uint16_t LocalValueNumbering::MarkNonAliasingNonNull(MIR* mir) { |
| uint16_t res = GetOperandValue(mir->ssa_rep->defs[0]); |
| SetOperandValue(mir->ssa_rep->defs[0], res); |
| DCHECK(null_checked_.find(res) == null_checked_.end()); |
| null_checked_.insert(res); |
| non_aliasing_refs_.insert(res); |
| return res; |
| } |
| |
| void LocalValueNumbering::MakeArgsAliasing(MIR* mir) { |
| for (size_t i = 0u, count = mir->ssa_rep->num_uses; i != count; ++i) { |
| uint16_t reg = GetOperandValue(mir->ssa_rep->uses[i]); |
| non_aliasing_refs_.erase(reg); |
| } |
| } |
| |
| void LocalValueNumbering::HandleNullCheck(MIR* mir, uint16_t reg) { |
| if (null_checked_.find(reg) != null_checked_.end()) { |
| if (cu_->verbose) { |
| LOG(INFO) << "Removing null check for 0x" << std::hex << mir->offset; |
| } |
| mir->optimization_flags |= MIR_IGNORE_NULL_CHECK; |
| } else { |
| null_checked_.insert(reg); |
| } |
| } |
| |
| void LocalValueNumbering::HandleRangeCheck(MIR* mir, uint16_t array, uint16_t index) { |
| if (ValueExists(ARRAY_REF, array, index, NO_VALUE)) { |
| if (cu_->verbose) { |
| LOG(INFO) << "Removing range check for 0x" << std::hex << mir->offset; |
| } |
| mir->optimization_flags |= MIR_IGNORE_RANGE_CHECK; |
| } |
| // Use side effect to note range check completed. |
| (void)LookupValue(ARRAY_REF, array, index, NO_VALUE); |
| } |
| |
| void LocalValueNumbering::HandlePutObject(MIR* mir) { |
| // If we're storing a non-aliasing reference, stop tracking it as non-aliasing now. |
| uint16_t base = GetOperandValue(mir->ssa_rep->uses[0]); |
| non_aliasing_refs_.erase(base); |
| } |
| |
| uint16_t LocalValueNumbering::GetValueNumber(MIR* mir) { |
| uint16_t res = NO_VALUE; |
| uint16_t opcode = mir->dalvikInsn.opcode; |
| switch (opcode) { |
| case Instruction::NOP: |
| case Instruction::RETURN_VOID: |
| case Instruction::RETURN: |
| case Instruction::RETURN_OBJECT: |
| case Instruction::RETURN_WIDE: |
| case Instruction::MONITOR_ENTER: |
| case Instruction::MONITOR_EXIT: |
| case Instruction::GOTO: |
| case Instruction::GOTO_16: |
| case Instruction::GOTO_32: |
| case Instruction::CHECK_CAST: |
| case Instruction::THROW: |
| case Instruction::FILL_ARRAY_DATA: |
| case Instruction::PACKED_SWITCH: |
| case Instruction::SPARSE_SWITCH: |
| case Instruction::IF_EQ: |
| case Instruction::IF_NE: |
| case Instruction::IF_LT: |
| case Instruction::IF_GE: |
| case Instruction::IF_GT: |
| case Instruction::IF_LE: |
| case Instruction::IF_EQZ: |
| case Instruction::IF_NEZ: |
| case Instruction::IF_LTZ: |
| case Instruction::IF_GEZ: |
| case Instruction::IF_GTZ: |
| case Instruction::IF_LEZ: |
| case kMirOpFusedCmplFloat: |
| case kMirOpFusedCmpgFloat: |
| case kMirOpFusedCmplDouble: |
| case kMirOpFusedCmpgDouble: |
| case kMirOpFusedCmpLong: |
| // Nothing defined - take no action. |
| break; |
| |
| case Instruction::FILLED_NEW_ARRAY: |
| case Instruction::FILLED_NEW_ARRAY_RANGE: |
| // Nothing defined but the result will be unique and non-null. |
| if (mir->next != nullptr && mir->next->dalvikInsn.opcode == Instruction::MOVE_RESULT_OBJECT) { |
| MarkNonAliasingNonNull(mir->next); |
| // The MOVE_RESULT_OBJECT will be processed next and we'll return the value name then. |
| } |
| MakeArgsAliasing(mir); |
| break; |
| |
| case Instruction::INVOKE_DIRECT: |
| case Instruction::INVOKE_DIRECT_RANGE: |
| case Instruction::INVOKE_VIRTUAL: |
| case Instruction::INVOKE_VIRTUAL_RANGE: |
| case Instruction::INVOKE_SUPER: |
| case Instruction::INVOKE_SUPER_RANGE: |
| case Instruction::INVOKE_INTERFACE: |
| case Instruction::INVOKE_INTERFACE_RANGE: { |
| // Nothing defined but handle the null check. |
| uint16_t reg = GetOperandValue(mir->ssa_rep->uses[0]); |
| HandleNullCheck(mir, reg); |
| } |
| // Intentional fall-through. |
| case Instruction::INVOKE_STATIC: |
| case Instruction::INVOKE_STATIC_RANGE: |
| if ((mir->optimization_flags & MIR_INLINED) == 0) { |
| AdvanceGlobalMemory(); |
| MakeArgsAliasing(mir); |
| } |
| break; |
| |
| case Instruction::MOVE_RESULT: |
| case Instruction::MOVE_RESULT_OBJECT: |
| case Instruction::INSTANCE_OF: |
| // 1 result, treat as unique each time, use result s_reg - will be unique. |
| res = GetOperandValue(mir->ssa_rep->defs[0]); |
| SetOperandValue(mir->ssa_rep->defs[0], res); |
| break; |
| case Instruction::MOVE_EXCEPTION: |
| case Instruction::NEW_INSTANCE: |
| case Instruction::CONST_STRING: |
| case Instruction::CONST_STRING_JUMBO: |
| case Instruction::CONST_CLASS: |
| case Instruction::NEW_ARRAY: |
| // 1 result, treat as unique each time, use result s_reg - will be unique. |
| res = MarkNonAliasingNonNull(mir); |
| break; |
| case Instruction::MOVE_RESULT_WIDE: |
| // 1 wide result, treat as unique each time, use result s_reg - will be unique. |
| res = GetOperandValueWide(mir->ssa_rep->defs[0]); |
| SetOperandValueWide(mir->ssa_rep->defs[0], res); |
| break; |
| |
| case kMirOpPhi: |
| /* |
| * Because we'll only see phi nodes at the beginning of an extended basic block, |
| * we can ignore them. Revisit if we shift to global value numbering. |
| */ |
| break; |
| |
| case Instruction::MOVE: |
| case Instruction::MOVE_OBJECT: |
| case Instruction::MOVE_16: |
| case Instruction::MOVE_OBJECT_16: |
| case Instruction::MOVE_FROM16: |
| case Instruction::MOVE_OBJECT_FROM16: |
| case kMirOpCopy: |
| // Just copy value number of source to value number of result. |
| res = GetOperandValue(mir->ssa_rep->uses[0]); |
| SetOperandValue(mir->ssa_rep->defs[0], res); |
| break; |
| |
| case Instruction::MOVE_WIDE: |
| case Instruction::MOVE_WIDE_16: |
| case Instruction::MOVE_WIDE_FROM16: |
| // Just copy value number of source to value number of result. |
| res = GetOperandValueWide(mir->ssa_rep->uses[0]); |
| SetOperandValueWide(mir->ssa_rep->defs[0], res); |
| break; |
| |
| case Instruction::CONST: |
| case Instruction::CONST_4: |
| case Instruction::CONST_16: |
| res = LookupValue(Instruction::CONST, Low16Bits(mir->dalvikInsn.vB), |
| High16Bits(mir->dalvikInsn.vB >> 16), 0); |
| SetOperandValue(mir->ssa_rep->defs[0], res); |
| break; |
| |
| case Instruction::CONST_HIGH16: |
| res = LookupValue(Instruction::CONST, 0, mir->dalvikInsn.vB, 0); |
| SetOperandValue(mir->ssa_rep->defs[0], res); |
| break; |
| |
| case Instruction::CONST_WIDE_16: |
| case Instruction::CONST_WIDE_32: { |
| uint16_t low_res = LookupValue(Instruction::CONST, Low16Bits(mir->dalvikInsn.vB), |
| High16Bits(mir->dalvikInsn.vB >> 16), 1); |
| uint16_t high_res; |
| if (mir->dalvikInsn.vB & 0x80000000) { |
| high_res = LookupValue(Instruction::CONST, 0xffff, 0xffff, 2); |
| } else { |
| high_res = LookupValue(Instruction::CONST, 0, 0, 2); |
| } |
| res = LookupValue(Instruction::CONST, low_res, high_res, 3); |
| SetOperandValueWide(mir->ssa_rep->defs[0], res); |
| } |
| break; |
| |
| case Instruction::CONST_WIDE: { |
| uint32_t low_word = Low32Bits(mir->dalvikInsn.vB_wide); |
| uint32_t high_word = High32Bits(mir->dalvikInsn.vB_wide); |
| uint16_t low_res = LookupValue(Instruction::CONST, Low16Bits(low_word), |
| High16Bits(low_word), 1); |
| uint16_t high_res = LookupValue(Instruction::CONST, Low16Bits(high_word), |
| High16Bits(high_word), 2); |
| res = LookupValue(Instruction::CONST, low_res, high_res, 3); |
| SetOperandValueWide(mir->ssa_rep->defs[0], res); |
| } |
| break; |
| |
| case Instruction::CONST_WIDE_HIGH16: { |
| uint16_t low_res = LookupValue(Instruction::CONST, 0, 0, 1); |
| uint16_t high_res = LookupValue(Instruction::CONST, 0, Low16Bits(mir->dalvikInsn.vB), 2); |
| res = LookupValue(Instruction::CONST, low_res, high_res, 3); |
| SetOperandValueWide(mir->ssa_rep->defs[0], res); |
| } |
| break; |
| |
| case Instruction::ARRAY_LENGTH: |
| case Instruction::NEG_INT: |
| case Instruction::NOT_INT: |
| case Instruction::NEG_FLOAT: |
| case Instruction::INT_TO_BYTE: |
| case Instruction::INT_TO_SHORT: |
| case Instruction::INT_TO_CHAR: |
| case Instruction::INT_TO_FLOAT: |
| case Instruction::FLOAT_TO_INT: { |
| // res = op + 1 operand |
| uint16_t operand1 = GetOperandValue(mir->ssa_rep->uses[0]); |
| res = LookupValue(opcode, operand1, NO_VALUE, NO_VALUE); |
| SetOperandValue(mir->ssa_rep->defs[0], res); |
| } |
| break; |
| |
| case Instruction::LONG_TO_FLOAT: |
| case Instruction::LONG_TO_INT: |
| case Instruction::DOUBLE_TO_FLOAT: |
| case Instruction::DOUBLE_TO_INT: { |
| // res = op + 1 wide operand |
| uint16_t operand1 = GetOperandValue(mir->ssa_rep->uses[0]); |
| res = LookupValue(opcode, operand1, NO_VALUE, NO_VALUE); |
| SetOperandValue(mir->ssa_rep->defs[0], res); |
| } |
| break; |
| |
| |
| case Instruction::DOUBLE_TO_LONG: |
| case Instruction::LONG_TO_DOUBLE: |
| case Instruction::NEG_LONG: |
| case Instruction::NOT_LONG: |
| case Instruction::NEG_DOUBLE: { |
| // wide res = op + 1 wide operand |
| uint16_t operand1 = GetOperandValueWide(mir->ssa_rep->uses[0]); |
| res = LookupValue(opcode, operand1, NO_VALUE, NO_VALUE); |
| SetOperandValueWide(mir->ssa_rep->defs[0], res); |
| } |
| break; |
| |
| case Instruction::FLOAT_TO_DOUBLE: |
| case Instruction::FLOAT_TO_LONG: |
| case Instruction::INT_TO_DOUBLE: |
| case Instruction::INT_TO_LONG: { |
| // wide res = op + 1 operand |
| uint16_t operand1 = GetOperandValueWide(mir->ssa_rep->uses[0]); |
| res = LookupValue(opcode, operand1, NO_VALUE, NO_VALUE); |
| SetOperandValueWide(mir->ssa_rep->defs[0], res); |
| } |
| break; |
| |
| case Instruction::CMPL_DOUBLE: |
| case Instruction::CMPG_DOUBLE: |
| case Instruction::CMP_LONG: { |
| // res = op + 2 wide operands |
| uint16_t operand1 = GetOperandValueWide(mir->ssa_rep->uses[0]); |
| uint16_t operand2 = GetOperandValueWide(mir->ssa_rep->uses[2]); |
| res = LookupValue(opcode, operand1, operand2, NO_VALUE); |
| SetOperandValue(mir->ssa_rep->defs[0], res); |
| } |
| break; |
| |
| case Instruction::CMPG_FLOAT: |
| case Instruction::CMPL_FLOAT: |
| case Instruction::ADD_INT: |
| case Instruction::ADD_INT_2ADDR: |
| case Instruction::MUL_INT: |
| case Instruction::MUL_INT_2ADDR: |
| case Instruction::AND_INT: |
| case Instruction::AND_INT_2ADDR: |
| case Instruction::OR_INT: |
| case Instruction::OR_INT_2ADDR: |
| case Instruction::XOR_INT: |
| case Instruction::XOR_INT_2ADDR: |
| case Instruction::SUB_INT: |
| case Instruction::SUB_INT_2ADDR: |
| case Instruction::DIV_INT: |
| case Instruction::DIV_INT_2ADDR: |
| case Instruction::REM_INT: |
| case Instruction::REM_INT_2ADDR: |
| case Instruction::SHL_INT: |
| case Instruction::SHL_INT_2ADDR: |
| case Instruction::SHR_INT: |
| case Instruction::SHR_INT_2ADDR: |
| case Instruction::USHR_INT: |
| case Instruction::USHR_INT_2ADDR: { |
| // res = op + 2 operands |
| uint16_t operand1 = GetOperandValue(mir->ssa_rep->uses[0]); |
| uint16_t operand2 = GetOperandValue(mir->ssa_rep->uses[1]); |
| res = LookupValue(opcode, operand1, operand2, NO_VALUE); |
| SetOperandValue(mir->ssa_rep->defs[0], res); |
| } |
| break; |
| |
| case Instruction::ADD_LONG: |
| case Instruction::SUB_LONG: |
| case Instruction::MUL_LONG: |
| case Instruction::DIV_LONG: |
| case Instruction::REM_LONG: |
| case Instruction::AND_LONG: |
| case Instruction::OR_LONG: |
| case Instruction::XOR_LONG: |
| case Instruction::ADD_LONG_2ADDR: |
| case Instruction::SUB_LONG_2ADDR: |
| case Instruction::MUL_LONG_2ADDR: |
| case Instruction::DIV_LONG_2ADDR: |
| case Instruction::REM_LONG_2ADDR: |
| case Instruction::AND_LONG_2ADDR: |
| case Instruction::OR_LONG_2ADDR: |
| case Instruction::XOR_LONG_2ADDR: |
| case Instruction::ADD_DOUBLE: |
| case Instruction::SUB_DOUBLE: |
| case Instruction::MUL_DOUBLE: |
| case Instruction::DIV_DOUBLE: |
| case Instruction::REM_DOUBLE: |
| case Instruction::ADD_DOUBLE_2ADDR: |
| case Instruction::SUB_DOUBLE_2ADDR: |
| case Instruction::MUL_DOUBLE_2ADDR: |
| case Instruction::DIV_DOUBLE_2ADDR: |
| case Instruction::REM_DOUBLE_2ADDR: { |
| // wide res = op + 2 wide operands |
| uint16_t operand1 = GetOperandValueWide(mir->ssa_rep->uses[0]); |
| uint16_t operand2 = GetOperandValueWide(mir->ssa_rep->uses[2]); |
| res = LookupValue(opcode, operand1, operand2, NO_VALUE); |
| SetOperandValueWide(mir->ssa_rep->defs[0], res); |
| } |
| break; |
| |
| case Instruction::SHL_LONG: |
| case Instruction::SHR_LONG: |
| case Instruction::USHR_LONG: |
| case Instruction::SHL_LONG_2ADDR: |
| case Instruction::SHR_LONG_2ADDR: |
| case Instruction::USHR_LONG_2ADDR: { |
| // wide res = op + 1 wide operand + 1 operand |
| uint16_t operand1 = GetOperandValueWide(mir->ssa_rep->uses[0]); |
| uint16_t operand2 = GetOperandValueWide(mir->ssa_rep->uses[2]); |
| res = LookupValue(opcode, operand1, operand2, NO_VALUE); |
| SetOperandValueWide(mir->ssa_rep->defs[0], res); |
| } |
| break; |
| |
| case Instruction::ADD_FLOAT: |
| case Instruction::SUB_FLOAT: |
| case Instruction::MUL_FLOAT: |
| case Instruction::DIV_FLOAT: |
| case Instruction::REM_FLOAT: |
| case Instruction::ADD_FLOAT_2ADDR: |
| case Instruction::SUB_FLOAT_2ADDR: |
| case Instruction::MUL_FLOAT_2ADDR: |
| case Instruction::DIV_FLOAT_2ADDR: |
| case Instruction::REM_FLOAT_2ADDR: { |
| // res = op + 2 operands |
| uint16_t operand1 = GetOperandValue(mir->ssa_rep->uses[0]); |
| uint16_t operand2 = GetOperandValue(mir->ssa_rep->uses[1]); |
| res = LookupValue(opcode, operand1, operand2, NO_VALUE); |
| SetOperandValue(mir->ssa_rep->defs[0], res); |
| } |
| break; |
| |
| case Instruction::RSUB_INT: |
| case Instruction::ADD_INT_LIT16: |
| case Instruction::MUL_INT_LIT16: |
| case Instruction::DIV_INT_LIT16: |
| case Instruction::REM_INT_LIT16: |
| case Instruction::AND_INT_LIT16: |
| case Instruction::OR_INT_LIT16: |
| case Instruction::XOR_INT_LIT16: |
| case Instruction::ADD_INT_LIT8: |
| case Instruction::RSUB_INT_LIT8: |
| case Instruction::MUL_INT_LIT8: |
| case Instruction::DIV_INT_LIT8: |
| case Instruction::REM_INT_LIT8: |
| case Instruction::AND_INT_LIT8: |
| case Instruction::OR_INT_LIT8: |
| case Instruction::XOR_INT_LIT8: |
| case Instruction::SHL_INT_LIT8: |
| case Instruction::SHR_INT_LIT8: |
| case Instruction::USHR_INT_LIT8: { |
| // Same as res = op + 2 operands, except use vC as operand 2 |
| uint16_t operand1 = GetOperandValue(mir->ssa_rep->uses[0]); |
| uint16_t operand2 = LookupValue(Instruction::CONST, mir->dalvikInsn.vC, 0, 0); |
| res = LookupValue(opcode, operand1, operand2, NO_VALUE); |
| SetOperandValue(mir->ssa_rep->defs[0], res); |
| } |
| break; |
| |
| case Instruction::AGET_OBJECT: |
| case Instruction::AGET: |
| case Instruction::AGET_WIDE: |
| case Instruction::AGET_BOOLEAN: |
| case Instruction::AGET_BYTE: |
| case Instruction::AGET_CHAR: |
| case Instruction::AGET_SHORT: { |
| uint16_t type = opcode - Instruction::AGET; |
| uint16_t array = GetOperandValue(mir->ssa_rep->uses[0]); |
| HandleNullCheck(mir, array); |
| uint16_t index = GetOperandValue(mir->ssa_rep->uses[1]); |
| HandleRangeCheck(mir, array, index); |
| // Establish value number for loaded register. Note use of memory version. |
| uint16_t memory_version = GetMemoryVersion(array, NO_VALUE, type); |
| uint16_t res = LookupValue(ARRAY_REF, array, index, memory_version); |
| if (opcode == Instruction::AGET_WIDE) { |
| SetOperandValueWide(mir->ssa_rep->defs[0], res); |
| } else { |
| SetOperandValue(mir->ssa_rep->defs[0], res); |
| } |
| } |
| break; |
| |
| case Instruction::APUT_OBJECT: |
| HandlePutObject(mir); |
| // Intentional fall-through. |
| case Instruction::APUT: |
| case Instruction::APUT_WIDE: |
| case Instruction::APUT_BYTE: |
| case Instruction::APUT_BOOLEAN: |
| case Instruction::APUT_SHORT: |
| case Instruction::APUT_CHAR: { |
| uint16_t type = opcode - Instruction::APUT; |
| int array_idx = (opcode == Instruction::APUT_WIDE) ? 2 : 1; |
| int index_idx = array_idx + 1; |
| uint16_t array = GetOperandValue(mir->ssa_rep->uses[array_idx]); |
| HandleNullCheck(mir, array); |
| uint16_t index = GetOperandValue(mir->ssa_rep->uses[index_idx]); |
| HandleRangeCheck(mir, array, index); |
| // Rev the memory version |
| AdvanceMemoryVersion(array, NO_VALUE, type); |
| } |
| break; |
| |
| case Instruction::IGET_OBJECT: |
| case Instruction::IGET: |
| case Instruction::IGET_WIDE: |
| case Instruction::IGET_BOOLEAN: |
| case Instruction::IGET_BYTE: |
| case Instruction::IGET_CHAR: |
| case Instruction::IGET_SHORT: { |
| uint16_t type = opcode - Instruction::IGET; |
| uint16_t base = GetOperandValue(mir->ssa_rep->uses[0]); |
| HandleNullCheck(mir, base); |
| const MirFieldInfo& field_info = cu_->mir_graph->GetIFieldLoweringInfo(mir); |
| uint16_t memory_version; |
| uint16_t field_id; |
| if (!field_info.IsResolved() || field_info.IsVolatile()) { |
| // Volatile fields always get a new memory version; field id is irrelevant. |
| // Unresolved fields may be volatile, so handle them as such to be safe. |
| field_id = 0u; |
| memory_version = next_memory_version_; |
| ++next_memory_version_; |
| } else { |
| DCHECK(field_info.IsResolved()); |
| field_id = GetFieldId(field_info.DeclaringDexFile(), field_info.DeclaringFieldIndex()); |
| memory_version = std::max(unresolved_ifield_version_[type], |
| GetMemoryVersion(base, field_id, type)); |
| } |
| if (opcode == Instruction::IGET_WIDE) { |
| res = LookupValue(Instruction::IGET_WIDE, base, field_id, memory_version); |
| SetOperandValueWide(mir->ssa_rep->defs[0], res); |
| } else { |
| res = LookupValue(Instruction::IGET, base, field_id, memory_version); |
| SetOperandValue(mir->ssa_rep->defs[0], res); |
| } |
| } |
| break; |
| |
| case Instruction::IPUT_OBJECT: |
| HandlePutObject(mir); |
| // Intentional fall-through. |
| case Instruction::IPUT: |
| case Instruction::IPUT_WIDE: |
| case Instruction::IPUT_BOOLEAN: |
| case Instruction::IPUT_BYTE: |
| case Instruction::IPUT_CHAR: |
| case Instruction::IPUT_SHORT: { |
| uint16_t type = opcode - Instruction::IPUT; |
| int base_reg = (opcode == Instruction::IPUT_WIDE) ? 2 : 1; |
| uint16_t base = GetOperandValue(mir->ssa_rep->uses[base_reg]); |
| HandleNullCheck(mir, base); |
| const MirFieldInfo& field_info = cu_->mir_graph->GetIFieldLoweringInfo(mir); |
| if (!field_info.IsResolved()) { |
| // Unresolved fields always alias with everything of the same type. |
| unresolved_ifield_version_[type] = next_memory_version_; |
| ++next_memory_version_; |
| } else if (field_info.IsVolatile()) { |
| // Nothing to do, resolved volatile fields always get a new memory version anyway and |
| // can't alias with resolved non-volatile fields. |
| } else { |
| AdvanceMemoryVersion(base, GetFieldId(field_info.DeclaringDexFile(), |
| field_info.DeclaringFieldIndex()), type); |
| } |
| } |
| break; |
| |
| case Instruction::SGET_OBJECT: |
| case Instruction::SGET: |
| case Instruction::SGET_WIDE: |
| case Instruction::SGET_BOOLEAN: |
| case Instruction::SGET_BYTE: |
| case Instruction::SGET_CHAR: |
| case Instruction::SGET_SHORT: { |
| uint16_t type = opcode - Instruction::SGET; |
| const MirFieldInfo& field_info = cu_->mir_graph->GetSFieldLoweringInfo(mir); |
| uint16_t memory_version; |
| uint16_t field_id; |
| if (!field_info.IsResolved() || field_info.IsVolatile()) { |
| // Volatile fields always get a new memory version; field id is irrelevant. |
| // Unresolved fields may be volatile, so handle them as such to be safe. |
| field_id = 0u; |
| memory_version = next_memory_version_; |
| ++next_memory_version_; |
| } else { |
| DCHECK(field_info.IsResolved()); |
| field_id = GetFieldId(field_info.DeclaringDexFile(), field_info.DeclaringFieldIndex()); |
| memory_version = std::max(unresolved_sfield_version_[type], |
| GetMemoryVersion(NO_VALUE, field_id, type)); |
| } |
| if (opcode == Instruction::SGET_WIDE) { |
| res = LookupValue(Instruction::SGET_WIDE, NO_VALUE, field_id, memory_version); |
| SetOperandValueWide(mir->ssa_rep->defs[0], res); |
| } else { |
| res = LookupValue(Instruction::SGET, NO_VALUE, field_id, memory_version); |
| SetOperandValue(mir->ssa_rep->defs[0], res); |
| } |
| } |
| break; |
| |
| case Instruction::SPUT_OBJECT: |
| HandlePutObject(mir); |
| // Intentional fall-through. |
| case Instruction::SPUT: |
| case Instruction::SPUT_WIDE: |
| case Instruction::SPUT_BOOLEAN: |
| case Instruction::SPUT_BYTE: |
| case Instruction::SPUT_CHAR: |
| case Instruction::SPUT_SHORT: { |
| uint16_t type = opcode - Instruction::SPUT; |
| const MirFieldInfo& field_info = cu_->mir_graph->GetSFieldLoweringInfo(mir); |
| if (!field_info.IsResolved()) { |
| // Unresolved fields always alias with everything of the same type. |
| unresolved_sfield_version_[type] = next_memory_version_; |
| ++next_memory_version_; |
| } else if (field_info.IsVolatile()) { |
| // Nothing to do, resolved volatile fields always get a new memory version anyway and |
| // can't alias with resolved non-volatile fields. |
| } else { |
| AdvanceMemoryVersion(NO_VALUE, GetFieldId(field_info.DeclaringDexFile(), |
| field_info.DeclaringFieldIndex()), type); |
| } |
| } |
| break; |
| } |
| return res; |
| } |
| |
| } // namespace art |
