[interpreter]: Changes to interpreter builtins for accumulator and register file registers.

src/compiler/interpreter-assembler.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/interpreter-assembler.h"
 
 #include <ostream>
 
 #include "src/compiler/graph.h"
 #include "src/compiler/instruction-selector.h"
@@ skipping 13 matching lines @@
 
 
 InterpreterAssembler::InterpreterAssembler(Isolate* isolate, Zone* zone,
                                            interpreter::Bytecode bytecode)
     : bytecode_(bytecode),
       raw_assembler_(new RawMachineAssembler(
           isolate, new (zone) Graph(zone),
           Linkage::GetInterpreterDispatchDescriptor(zone), kMachPtr,
           InstructionSelector::SupportedMachineOperatorFlags())),
       end_node_(nullptr),
+      outgoing_accumulator_(nullptr),
       code_generated_(false) {}
 
 
 InterpreterAssembler::~InterpreterAssembler() {}
 
 
 Handle<Code> InterpreterAssembler::GenerateCode() {
   DCHECK(!code_generated_);
 
   End();
 
   Schedule* schedule = raw_assembler_->Export();
   // TODO(rmcilroy): use a non-testing code generator.
   Handle<Code> code = Pipeline::GenerateCodeForTesting(
       isolate(), raw_assembler_->call_descriptor(), graph(), schedule);
 
 #ifdef ENABLE_DISASSEMBLER
   if (FLAG_trace_ignition_codegen) {
     OFStream os(stdout);
     code->Disassemble(interpreter::Bytecodes::ToString(bytecode_), os);
     os << std::flush;
   }
 #endif
 
   code_generated_ = true;
   return code;
 }
 
 
+Node* InterpreterAssembler::IncomingAccumulator() {
+  return raw_assembler_->Parameter(Linkage::kInterpreterAccumulatorParameter);
+}
+
+
+void InterpreterAssembler::StoreAccumulator(Node* value) {
+  DCHECK(!outgoing_accumulator_);
+  outgoing_accumulator_ = value;
+}
+
+
+Node* InterpreterAssembler::OutgoingAccumulator() {
+  if (outgoing_accumulator_) {
+    return outgoing_accumulator_;
+  } else {
+    return IncomingAccumulator();
+  }
+}
+
+
+Node* InterpreterAssembler::RegisterFilePointer() {
+  return raw_assembler_->Parameter(Linkage::kInterpreterRegisterFileParameter);
+}
+
+
 Node* InterpreterAssembler::BytecodeArrayPointer() {
   return raw_assembler_->Parameter(Linkage::kInterpreterBytecodeArrayParameter);
 }
 
 
 Node* InterpreterAssembler::BytecodeOffset() {
   return raw_assembler_->Parameter(
       Linkage::kInterpreterBytecodeOffsetParameter);
 }
 
 
 Node* InterpreterAssembler::DispatchTablePointer() {
   return raw_assembler_->Parameter(Linkage::kInterpreterDispatchTableParameter);
 }
 
 
-Node* InterpreterAssembler::FramePointer() {
-  return raw_assembler_->LoadFramePointer();
-}
-
-
-Node* InterpreterAssembler::RegisterFrameOffset(int index) {
-  DCHECK_LE(index, kMaxRegisterIndex);
-  return Int32Constant(kFirstRegisterOffsetFromFp -
-                       (index << kPointerSizeLog2));
-}
-
-
 Node* InterpreterAssembler::RegisterFrameOffset(Node* index) {
-  return raw_assembler_->IntPtrSub(
-      Int32Constant(kFirstRegisterOffsetFromFp),
-      raw_assembler_->WordShl(index, Int32Constant(kPointerSizeLog2)));
+  return raw_assembler_->WordShl(index, Int32Constant(kPointerSizeLog2));
 }
 
 
+Node* InterpreterAssembler::LoadRegister(Node* reg_index) {
+  return raw_assembler_->Load(kMachPtr, RegisterFilePointer(),
+                              RegisterFrameOffset(reg_index));
+}
+
+
+Node* InterpreterAssembler::StoreRegister(Node* value, Node* reg_index) {
+  return raw_assembler_->Store(kMachPtr, RegisterFilePointer(),
+                               RegisterFrameOffset(reg_index), value);
+}
+
+
 Node* InterpreterAssembler::BytecodeOperand(int delta) {
   DCHECK_LT(delta, interpreter::Bytecodes::NumberOfOperands(bytecode_));
   return raw_assembler_->Load(
       kMachUint8, BytecodeArrayPointer(),
       raw_assembler_->IntPtrAdd(BytecodeOffset(), Int32Constant(1 + delta)));
 }
 
 
-Node* InterpreterAssembler::LoadRegister(int index) {
-  return raw_assembler_->Load(kMachPtr, FramePointer(),
-                              RegisterFrameOffset(index));
+Node* InterpreterAssembler::BytecodeOperandSignExtended(int delta) {
+  DCHECK_LT(delta, interpreter::Bytecodes::NumberOfOperands(bytecode_));
+  Node* load = raw_assembler_->Load(
+      kMachInt8, BytecodeArrayPointer(),
+      raw_assembler_->IntPtrAdd(BytecodeOffset(), Int32Constant(1 + delta)));
+  // Ensure that we sign extend to full pointer size
+  if (kPointerSize == 8) {
+    load = raw_assembler_->ChangeInt32ToInt64(load);
+  }
+  return load;
 }
 
 
-Node* InterpreterAssembler::LoadRegister(Node* index) {
-  return raw_assembler_->Load(kMachPtr, FramePointer(),
-                              RegisterFrameOffset(index));
-}
-
-
-Node* InterpreterAssembler::StoreRegister(Node* value, int index) {
-  return raw_assembler_->Store(kMachPtr, FramePointer(),
-                               RegisterFrameOffset(index), value);
-}
-
-
-Node* InterpreterAssembler::StoreRegister(Node* value, Node* index) {
-  return raw_assembler_->Store(kMachPtr, FramePointer(),
-                               RegisterFrameOffset(index), value);
-}
-
-
 void InterpreterAssembler::Return() {
   Node* exit_trampoline_code_object =
       HeapConstant(Unique<HeapObject>::CreateImmovable(
           isolate()->builtins()->InterpreterExitTrampoline()));
   // If the order of the parameters you need to change the call signature below.
-  STATIC_ASSERT(0 == Linkage::kInterpreterBytecodeOffsetParameter);
-  STATIC_ASSERT(1 == Linkage::kInterpreterBytecodeArrayParameter);
-  STATIC_ASSERT(2 == Linkage::kInterpreterDispatchTableParameter);
-  Node* tail_call = graph()->NewNode(
-      common()->TailCall(call_descriptor()), exit_trampoline_code_object,
-      BytecodeOffset(), BytecodeArrayPointer(), DispatchTablePointer(),
-      graph()->start(), graph()->start());
-  schedule()->AddTailCall(raw_assembler_->CurrentBlock(), tail_call);
+  STATIC_ASSERT(0 == Linkage::kInterpreterAccumulatorParameter);
+  STATIC_ASSERT(1 == Linkage::kInterpreterRegisterFileParameter);
+  STATIC_ASSERT(2 == Linkage::kInterpreterBytecodeOffsetParameter);
+  STATIC_ASSERT(3 == Linkage::kInterpreterBytecodeArrayParameter);
+  STATIC_ASSERT(4 == Linkage::kInterpreterDispatchTableParameter);
+  Node* tail_call = raw_assembler_->TailCallInterpreterDispatch(
+      call_descriptor(), exit_trampoline_code_object, OutgoingAccumulator(),
+      RegisterFilePointer(), BytecodeOffset(), BytecodeArrayPointer(),
+      DispatchTablePointer());
   // This should always be the end node.
   SetEndInput(tail_call);
 }
 
 
 Node* InterpreterAssembler::Advance(int delta) {
   return raw_assembler_->IntPtrAdd(BytecodeOffset(), Int32Constant(delta));
 }
 
 
 void InterpreterAssembler::Dispatch() {
   Node* new_bytecode_offset = Advance(interpreter::Bytecodes::Size(bytecode_));
   Node* target_bytecode = raw_assembler_->Load(
       kMachUint8, BytecodeArrayPointer(), new_bytecode_offset);
 
   // TODO(rmcilroy): Create a code target dispatch table to avoid conversion
   // from code object on every dispatch.
   Node* target_code_object = raw_assembler_->Load(
       kMachPtr, DispatchTablePointer(),
       raw_assembler_->Word32Shl(target_bytecode,
                                 Int32Constant(kPointerSizeLog2)));
 
   // If the order of the parameters you need to change the call signature below.
-  STATIC_ASSERT(0 == Linkage::kInterpreterBytecodeOffsetParameter);
-  STATIC_ASSERT(1 == Linkage::kInterpreterBytecodeArrayParameter);
-  STATIC_ASSERT(2 == Linkage::kInterpreterDispatchTableParameter);
-  Node* tail_call = graph()->NewNode(
-      common()->TailCall(call_descriptor()), target_code_object,
-      new_bytecode_offset, BytecodeArrayPointer(), DispatchTablePointer(),
-      graph()->start(), graph()->start());
-  schedule()->AddTailCall(raw_assembler_->CurrentBlock(), tail_call);
+  STATIC_ASSERT(0 == Linkage::kInterpreterAccumulatorParameter);
+  STATIC_ASSERT(1 == Linkage::kInterpreterRegisterFileParameter);
+  STATIC_ASSERT(2 == Linkage::kInterpreterBytecodeOffsetParameter);
+  STATIC_ASSERT(3 == Linkage::kInterpreterBytecodeArrayParameter);
+  STATIC_ASSERT(4 == Linkage::kInterpreterDispatchTableParameter);
+  Node* tail_call = raw_assembler_->TailCallInterpreterDispatch(
+      call_descriptor(), target_code_object, OutgoingAccumulator(),
+      RegisterFilePointer(), new_bytecode_offset, BytecodeArrayPointer(),
+      DispatchTablePointer());
   // This should always be the end node.
   SetEndInput(tail_call);
 }
 
 
 void InterpreterAssembler::SetEndInput(Node* input) {
   DCHECK(!end_node_);
   end_node_ = input;
 }
 
 
 void InterpreterAssembler::End() {
   DCHECK(end_node_);
   // TODO(rmcilroy): Support more than 1 end input.
-  Node* end = graph()->NewNode(common()->End(1), end_node_);
+  Node* end = graph()->NewNode(raw_assembler_->common()->End(1), end_node_);
   graph()->SetEnd(end);
 }
 
 
 // RawMachineAssembler delegate helpers:
 Isolate* InterpreterAssembler::isolate() { return raw_assembler_->isolate(); }
 
 
 Graph* InterpreterAssembler::graph() { return raw_assembler_->graph(); }
 
 
 CallDescriptor* InterpreterAssembler::call_descriptor() const {
   return raw_assembler_->call_descriptor();
 }
 
 
 Schedule* InterpreterAssembler::schedule() {
   return raw_assembler_->schedule();
 }
 
 
-MachineOperatorBuilder* InterpreterAssembler::machine() {
-  return raw_assembler_->machine();
-}
-
-
-CommonOperatorBuilder* InterpreterAssembler::common() {
-  return raw_assembler_->common();
-}
-
-
 Node* InterpreterAssembler::Int32Constant(int value) {
   return raw_assembler_->Int32Constant(value);
 }
 
 
 Node* InterpreterAssembler::NumberConstant(double value) {
   return raw_assembler_->NumberConstant(value);
 }
 
 
 Node* InterpreterAssembler::HeapConstant(Unique<HeapObject> object) {
   return raw_assembler_->HeapConstant(object);
 }
 
-
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8