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| 1 // Copyright 2015 the V8 project authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "src/compiler/interpreter-assembler.h" |
| 6 |
| 7 #include <ostream> |
| 8 |
| 9 #include "src/compiler/graph.h" |
| 10 #include "src/compiler/instruction-selector.h" |
| 11 #include "src/compiler/linkage.h" |
| 12 #include "src/compiler/machine-type.h" |
| 13 #include "src/compiler/pipeline.h" |
| 14 #include "src/compiler/raw-machine-assembler.h" |
| 15 #include "src/compiler/schedule.h" |
| 16 #include "src/frames.h" |
| 17 #include "src/interpreter/bytecodes.h" |
| 18 #include "src/macro-assembler.h" |
| 19 #include "src/zone.h" |
| 20 |
| 21 namespace v8 { |
| 22 namespace internal { |
| 23 namespace compiler { |
| 24 |
| 25 |
| 26 InterpreterAssembler::InterpreterAssembler(Isolate* isolate, Zone* zone, |
| 27 interpreter::Bytecode bytecode) |
| 28 : bytecode_(bytecode), |
| 29 raw_assembler_(new RawMachineAssembler( |
| 30 isolate, new (zone) Graph(zone), |
| 31 Linkage::GetInterpreterDispatchDescriptor(zone), kMachPtr, |
| 32 InstructionSelector::SupportedMachineOperatorFlags())), |
| 33 end_node_(nullptr), |
| 34 code_generated_(false) {} |
| 35 |
| 36 |
| 37 InterpreterAssembler::~InterpreterAssembler() {} |
| 38 |
| 39 |
| 40 Handle<Code> InterpreterAssembler::GenerateCode() { |
| 41 DCHECK(!code_generated_); |
| 42 |
| 43 End(); |
| 44 |
| 45 Schedule* schedule = raw_assembler_->Export(); |
| 46 // TODO(rmcilroy): use a non-testing code generator. |
| 47 Handle<Code> code = Pipeline::GenerateCodeForTesting( |
| 48 isolate(), raw_assembler_->call_descriptor(), graph(), schedule); |
| 49 |
| 50 #ifdef ENABLE_DISASSEMBLER |
| 51 if (FLAG_trace_ignition_codegen) { |
| 52 OFStream os(stdout); |
| 53 code->Disassemble(interpreter::Bytecodes::ToString(bytecode_), os); |
| 54 os << std::flush; |
| 55 } |
| 56 #endif |
| 57 |
| 58 code_generated_ = true; |
| 59 return code; |
| 60 } |
| 61 |
| 62 |
| 63 Node* InterpreterAssembler::BytecodePointer() { |
| 64 return raw_assembler_->Parameter(Linkage::kInterpreterBytecodeParameter); |
| 65 } |
| 66 |
| 67 |
| 68 Node* InterpreterAssembler::DispatchTablePointer() { |
| 69 return raw_assembler_->Parameter(Linkage::kInterpreterDispatchTableParameter); |
| 70 } |
| 71 |
| 72 |
| 73 Node* InterpreterAssembler::FramePointer() { |
| 74 return raw_assembler_->LoadFramePointer(); |
| 75 } |
| 76 |
| 77 |
| 78 Node* InterpreterAssembler::RegisterFrameOffset(int index) { |
| 79 DCHECK_LE(index, kMaxRegisterIndex); |
| 80 return Int32Constant(kFirstRegsterOffsetFromFp - (index << kPointerSizeLog2)); |
| 81 } |
| 82 |
| 83 |
| 84 Node* InterpreterAssembler::RegisterFrameOffset(Node* index) { |
| 85 return raw_assembler_->Int32Sub( |
| 86 Int32Constant(kFirstRegsterOffsetFromFp), |
| 87 raw_assembler_->Word32Shl(index, Int32Constant(kPointerSizeLog2))); |
| 88 } |
| 89 |
| 90 |
| 91 Node* InterpreterAssembler::BytecodeArg(int delta) { |
| 92 DCHECK_LT(delta, interpreter::Bytecodes::NumberOfArguments(bytecode_)); |
| 93 return raw_assembler_->Load(kMachUint8, BytecodePointer(), |
| 94 Int32Constant(1 + delta)); |
| 95 } |
| 96 |
| 97 |
| 98 Node* InterpreterAssembler::LoadRegister(int index) { |
| 99 return raw_assembler_->Load(kMachPtr, FramePointer(), |
| 100 RegisterFrameOffset(index)); |
| 101 } |
| 102 |
| 103 |
| 104 Node* InterpreterAssembler::LoadRegister(Node* index) { |
| 105 return raw_assembler_->Load(kMachPtr, FramePointer(), |
| 106 RegisterFrameOffset(index)); |
| 107 } |
| 108 |
| 109 |
| 110 Node* InterpreterAssembler::StoreRegister(Node* value, int index) { |
| 111 return raw_assembler_->Store(kMachPtr, FramePointer(), |
| 112 RegisterFrameOffset(index), value); |
| 113 } |
| 114 |
| 115 |
| 116 Node* InterpreterAssembler::StoreRegister(Node* value, Node* index) { |
| 117 return raw_assembler_->Store(kMachPtr, FramePointer(), |
| 118 RegisterFrameOffset(index), value); |
| 119 } |
| 120 |
| 121 |
| 122 Node* InterpreterAssembler::Advance(int delta) { |
| 123 return raw_assembler_->IntPtrAdd(BytecodePointer(), Int32Constant(delta)); |
| 124 } |
| 125 |
| 126 |
| 127 void InterpreterAssembler::Dispatch() { |
| 128 Node* new_bytecode_pointer = Advance(interpreter::Bytecodes::Size(bytecode_)); |
| 129 Node* target_bytecode = |
| 130 raw_assembler_->Load(kMachUint8, new_bytecode_pointer); |
| 131 |
| 132 // TODO(rmcilroy): Create a code target dispatch table to avoid conversion |
| 133 // from code object on every dispatch. |
| 134 Node* target_code_object = raw_assembler_->Load( |
| 135 kMachPtr, DispatchTablePointer(), |
| 136 raw_assembler_->Word32Shl(target_bytecode, |
| 137 Int32Constant(kPointerSizeLog2))); |
| 138 |
| 139 // If the order of the parameters you need to change the call signature below. |
| 140 STATIC_ASSERT(0 == Linkage::kInterpreterBytecodeParameter); |
| 141 STATIC_ASSERT(1 == Linkage::kInterpreterDispatchTableParameter); |
| 142 Node* tail_call = graph()->NewNode(common()->TailCall(call_descriptor()), |
| 143 target_code_object, new_bytecode_pointer, |
| 144 DispatchTablePointer(), graph()->start(), |
| 145 graph()->start()); |
| 146 schedule()->AddTailCall(raw_assembler_->CurrentBlock(), tail_call); |
| 147 |
| 148 // This should always be the end node. |
| 149 SetEndInput(tail_call); |
| 150 } |
| 151 |
| 152 |
| 153 void InterpreterAssembler::SetEndInput(Node* input) { |
| 154 DCHECK(!end_node_); |
| 155 end_node_ = input; |
| 156 } |
| 157 |
| 158 |
| 159 void InterpreterAssembler::End() { |
| 160 DCHECK(end_node_); |
| 161 // TODO(rmcilroy): Support more than 1 end input. |
| 162 Node* end = graph()->NewNode(common()->End(1), end_node_); |
| 163 graph()->SetEnd(end); |
| 164 } |
| 165 |
| 166 |
| 167 // RawMachineAssembler delegate helpers: |
| 168 Isolate* InterpreterAssembler::isolate() { return raw_assembler_->isolate(); } |
| 169 |
| 170 |
| 171 Graph* InterpreterAssembler::graph() { return raw_assembler_->graph(); } |
| 172 |
| 173 |
| 174 CallDescriptor* InterpreterAssembler::call_descriptor() const { |
| 175 return raw_assembler_->call_descriptor(); |
| 176 } |
| 177 |
| 178 |
| 179 Schedule* InterpreterAssembler::schedule() { |
| 180 return raw_assembler_->schedule(); |
| 181 } |
| 182 |
| 183 |
| 184 MachineOperatorBuilder* InterpreterAssembler::machine() { |
| 185 return raw_assembler_->machine(); |
| 186 } |
| 187 |
| 188 |
| 189 CommonOperatorBuilder* InterpreterAssembler::common() { |
| 190 return raw_assembler_->common(); |
| 191 } |
| 192 |
| 193 |
| 194 Node* InterpreterAssembler::Int32Constant(int value) { |
| 195 return raw_assembler_->Int32Constant(value); |
| 196 } |
| 197 |
| 198 |
| 199 Node* InterpreterAssembler::NumberConstant(double value) { |
| 200 return raw_assembler_->NumberConstant(value); |
| 201 } |
| 202 |
| 203 |
| 204 } // namespace interpreter |
| 205 } // namespace internal |
| 206 } // namespace v8 |
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