text: // Copyright 2014 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 "test/unittests/compiler/instruction-selector-unittest.h"
  
  #include "src/code-factory.h"
  #include "src/compiler/graph.h"
  #include "src/compiler/schedule.h"
  #include "src/flags.h"
  #include "test/unittests/compiler/compiler-test-utils.h"
  
  namespace v8 {
  namespace internal {
  namespace compiler {
  
  
  InstructionSelectorTest::InstructionSelectorTest() : rng_(FLAG_random_seed) {}
  
  
  InstructionSelectorTest::~InstructionSelectorTest() {}
  
  
  InstructionSelectorTest::Stream InstructionSelectorTest::StreamBuilder::Build(
      InstructionSelector::Features features,
      InstructionSelectorTest::StreamBuilderMode mode,
      InstructionSelector::SourcePositionMode source_position_mode) {
    Schedule* schedule = Export();
    if (FLAG_trace_turbo) {
      OFStream out(stdout);
      out << "=== Schedule before instruction selection ===" << std::endl
          << *schedule;
    }
    size_t const node_count = graph()->NodeCount();
    EXPECT_NE(0u, node_count);
    Linkage linkage(call_descriptor());
    InstructionBlocks* instruction_blocks =
        InstructionSequence::InstructionBlocksFor(test_->zone(), schedule);
    InstructionSequence sequence(test_->isolate(), test_->zone(),
                                 instruction_blocks);
    SourcePositionTable source_position_table(graph());
    InstructionSelector selector(test_->zone(), node_count, &linkage, &sequence,
                                 schedule, &source_position_table, nullptr,
                                 source_position_mode, features);
    selector.SelectInstructions();
    if (FLAG_trace_turbo) {
      OFStream out(stdout);
      PrintableInstructionSequence printable = {RegisterConfiguration::Turbofan(),
                                                &sequence};
      out << "=== Code sequence after instruction selection ===" << std::endl
          << printable;
    }
    Stream s;
    s.virtual_registers_ = selector.GetVirtualRegistersForTesting();
    // Map virtual registers.
    for (Instruction* const instr : sequence) {
      if (instr->opcode() < 0) continue;
      if (mode == kTargetInstructions) {
        switch (instr->arch_opcode()) {
  #define CASE(Name) \
    case k##Name:    \
      break;
          TARGET_ARCH_OPCODE_LIST(CASE)
  #undef CASE
          default:
            continue;
        }
      }
      if (mode == kAllExceptNopInstructions && instr->arch_opcode() == kArchNop) {
        continue;
      }
      for (size_t i = 0; i < instr->OutputCount(); ++i) {
        InstructionOperand* output = instr->OutputAt(i);
        EXPECT_NE(InstructionOperand::IMMEDIATE, output->kind());
        if (output->IsConstant()) {
          int vreg = ConstantOperand::cast(output)->virtual_register();
          s.constants_.insert(std::make_pair(vreg, sequence.GetConstant(vreg)));
        }
      }
      for (size_t i = 0; i < instr->InputCount(); ++i) {
        InstructionOperand* input = instr->InputAt(i);
        EXPECT_NE(InstructionOperand::CONSTANT, input->kind());
        if (input->IsImmediate()) {
          auto imm = ImmediateOperand::cast(input);
          if (imm->type() == ImmediateOperand::INDEXED) {
            int index = imm->indexed_value();
            s.immediates_.insert(
                std::make_pair(index, sequence.GetImmediate(imm)));
          }
        }
      }
      s.instructions_.push_back(instr);
    }
    for (auto i : s.virtual_registers_) {
      int const virtual_register = i.second;
      if (sequence.IsFP(virtual_register)) {
        EXPECT_FALSE(sequence.IsReference(virtual_register));
        s.doubles_.insert(virtual_register);
      }
      if (sequence.IsReference(virtual_register)) {
        EXPECT_FALSE(sequence.IsFP(virtual_register));
        s.references_.insert(virtual_register);
      }
    }
    for (int i = 0; i < sequence.GetDeoptimizationEntryCount(); i++) {
      s.deoptimization_entries_.push_back(
          sequence.GetDeoptimizationEntry(i).descriptor());
    }
    return s;
  }
  
  
  int InstructionSelectorTest::Stream::ToVreg(const Node* node) const {
    VirtualRegisters::const_iterator i = virtual_registers_.find(node->id());
    CHECK(i != virtual_registers_.end());
    return i->second;
  }
  
  
  bool InstructionSelectorTest::Stream::IsFixed(const InstructionOperand* operand,
                                                Register reg) const {
    if (!operand->IsUnallocated()) return false;
    const UnallocatedOperand* unallocated = UnallocatedOperand::cast(operand);
    if (!unallocated->HasFixedRegisterPolicy()) return false;
    return unallocated->fixed_register_index() == reg.code();
  }
  
  
  bool InstructionSelectorTest::Stream::IsSameAsFirst(
      const InstructionOperand* operand) const {
    if (!operand->IsUnallocated()) return false;
    const UnallocatedOperand* unallocated = UnallocatedOperand::cast(operand);
    return unallocated->HasSameAsInputPolicy();
  }
  
  
  bool InstructionSelectorTest::Stream::IsUsedAtStart(
      const InstructionOperand* operand) const {
    if (!operand->IsUnallocated()) return false;
    const UnallocatedOperand* unallocated = UnallocatedOperand::cast(operand);
    return unallocated->IsUsedAtStart();
  }
  
  
  const FrameStateFunctionInfo*
  InstructionSelectorTest::StreamBuilder::GetFrameStateFunctionInfo(
      int parameter_count, int local_count) {
    return common()->CreateFrameStateFunctionInfo(
        FrameStateType::kJavaScriptFunction, parameter_count, local_count,
        Handle<SharedFunctionInfo>());
  }
  
  
  // -----------------------------------------------------------------------------
  // Return.
  
  
  TARGET_TEST_F(InstructionSelectorTest, ReturnFloat32Constant) {
    const float kValue = 4.2f;
    StreamBuilder m(this, MachineType::Float32());
    m.Return(m.Float32Constant(kValue));
    Stream s = m.Build(kAllInstructions);
    ASSERT_EQ(3U, s.size());
    EXPECT_EQ(kArchNop, s[0]->arch_opcode());
    ASSERT_EQ(InstructionOperand::CONSTANT, s[0]->OutputAt(0)->kind());
    EXPECT_FLOAT_EQ(kValue, s.ToFloat32(s[0]->OutputAt(0)));
    EXPECT_EQ(kArchRet, s[1]->arch_opcode());
    EXPECT_EQ(1U, s[1]->InputCount());
  }
  
  
  TARGET_TEST_F(InstructionSelectorTest, ReturnParameter) {
    StreamBuilder m(this, MachineType::Int32(), MachineType::Int32());
    m.Return(m.Parameter(0));
    Stream s = m.Build(kAllInstructions);
    ASSERT_EQ(3U, s.size());
    EXPECT_EQ(kArchNop, s[0]->arch_opcode());
    ASSERT_EQ(1U, s[0]->OutputCount());
    EXPECT_EQ(kArchRet, s[1]->arch_opcode());
    EXPECT_EQ(1U, s[1]->InputCount());
  }
  
  
  TARGET_TEST_F(InstructionSelectorTest, ReturnZero) {
    StreamBuilder m(this, MachineType::Int32());
    m.Return(m.Int32Constant(0));
    Stream s = m.Build(kAllInstructions);
    ASSERT_EQ(3U, s.size());
    EXPECT_EQ(kArchNop, s[0]->arch_opcode());
    ASSERT_EQ(1U, s[0]->OutputCount());
    EXPECT_EQ(InstructionOperand::CONSTANT, s[0]->OutputAt(0)->kind());
    EXPECT_EQ(0, s.ToInt32(s[0]->OutputAt(0)));
    EXPECT_EQ(kArchRet, s[1]->arch_opcode());
    EXPECT_EQ(1U, s[1]->InputCount());
  }
  
  
  // -----------------------------------------------------------------------------
  // Conversions.
  
  TARGET_TEST_F(InstructionSelectorTest, TruncateFloat64ToWord32WithParameter) {
    StreamBuilder m(this, MachineType::Int32(), MachineType::Float64());
    m.Return(m.TruncateFloat64ToWord32(m.Parameter(0)));
    Stream s = m.Build(kAllInstructions);
    ASSERT_EQ(4U, s.size());
    EXPECT_EQ(kArchNop, s[0]->arch_opcode());
    EXPECT_EQ(kArchTruncateDoubleToI, s[1]->arch_opcode());
    EXPECT_EQ(1U, s[1]->InputCount());
    EXPECT_EQ(1U, s[1]->OutputCount());
    EXPECT_EQ(kArchRet, s[2]->arch_opcode());
  }
  
  
  // -----------------------------------------------------------------------------
  // Parameters.
  
  
  TARGET_TEST_F(InstructionSelectorTest, DoubleParameter) {
    StreamBuilder m(this, MachineType::Float64(), MachineType::Float64());
    Node* param = m.Parameter(0);
    m.Return(param);
    Stream s = m.Build(kAllInstructions);
    EXPECT_TRUE(s.IsDouble(param));
  }
  
  
  TARGET_TEST_F(InstructionSelectorTest, ReferenceParameter) {
    StreamBuilder m(this, MachineType::AnyTagged(), MachineType::AnyTagged());
    Node* param = m.Parameter(0);
    m.Return(param);
    Stream s = m.Build(kAllInstructions);
    EXPECT_TRUE(s.IsReference(param));
  }
  
  
  // -----------------------------------------------------------------------------
  // FinishRegion.
  
  
  TARGET_TEST_F(InstructionSelectorTest, FinishRegion) {
    StreamBuilder m(this, MachineType::AnyTagged(), MachineType::AnyTagged());
    Node* param = m.Parameter(0);
    Node* finish =
        m.AddNode(m.common()->FinishRegion(), param, m.graph()->start());
    m.Return(finish);
    Stream s = m.Build(kAllInstructions);
    ASSERT_EQ(4U, s.size());
    EXPECT_EQ(kArchNop, s[0]->arch_opcode());
    ASSERT_EQ(1U, s[0]->OutputCount());
    ASSERT_TRUE(s[0]->Output()->IsUnallocated());
    EXPECT_EQ(s.ToVreg(param), s.ToVreg(s[0]->Output()));
    EXPECT_EQ(kArchNop, s[1]->arch_opcode());
    ASSERT_EQ(1U, s[1]->InputCount());
    ASSERT_TRUE(s[1]->InputAt(0)->IsUnallocated());
    EXPECT_EQ(s.ToVreg(param), s.ToVreg(s[1]->InputAt(0)));
    ASSERT_EQ(1U, s[1]->OutputCount());
    ASSERT_TRUE(s[1]->Output()->IsUnallocated());
    EXPECT_TRUE(UnallocatedOperand::cast(s[1]->Output())->HasSameAsInputPolicy());
    EXPECT_EQ(s.ToVreg(finish), s.ToVreg(s[1]->Output()));
    EXPECT_TRUE(s.IsReference(finish));
  }
  
  
  // -----------------------------------------------------------------------------
  // Phi.
  
  
  typedef InstructionSelectorTestWithParam<MachineType>
      InstructionSelectorPhiTest;
  
  
  TARGET_TEST_P(InstructionSelectorPhiTest, Doubleness) {
    const MachineType type = GetParam();
    StreamBuilder m(this, type, type, type);
    Node* param0 = m.Parameter(0);
    Node* param1 = m.Parameter(1);
    RawMachineLabel a, b, c;
    m.Branch(m.Int32Constant(0), &a, &b);
    m.Bind(&a);
    m.Goto(&c);
    m.Bind(&b);
    m.Goto(&c);
    m.Bind(&c);
    Node* phi = m.Phi(type.representation(), param0, param1);
    m.Return(phi);
    Stream s = m.Build(kAllInstructions);
    EXPECT_EQ(s.IsDouble(phi), s.IsDouble(param0));
    EXPECT_EQ(s.IsDouble(phi), s.IsDouble(param1));
  }
  
  
  TARGET_TEST_P(InstructionSelectorPhiTest, Referenceness) {
    const MachineType type = GetParam();
    StreamBuilder m(this, type, type, type);
    Node* param0 = m.Parameter(0);
    Node* param1 = m.Parameter(1);
    RawMachineLabel a, b, c;
    m.Branch(m.Int32Constant(1), &a, &b);
    m.Bind(&a);
    m.Goto(&c);
    m.Bind(&b);
    m.Goto(&c);
    m.Bind(&c);
    Node* phi = m.Phi(type.representation(), param0, param1);
    m.Return(phi);
    Stream s = m.Build(kAllInstructions);
    EXPECT_EQ(s.IsReference(phi), s.IsReference(param0));
    EXPECT_EQ(s.IsReference(phi), s.IsReference(param1));
  }
  
  
  INSTANTIATE_TEST_CASE_P(
      InstructionSelectorTest, InstructionSelectorPhiTest,
      ::testing::Values(MachineType::Float64(), MachineType::Int8(),
                        MachineType::Uint8(), MachineType::Int16(),
                        MachineType::Uint16(), MachineType::Int32(),
                        MachineType::Uint32(), MachineType::Int64(),
                        MachineType::Uint64(), MachineType::Pointer(),
                        MachineType::AnyTagged()));
  
  
  // -----------------------------------------------------------------------------
  // ValueEffect.
  
  
  TARGET_TEST_F(InstructionSelectorTest, ValueEffect) {
    StreamBuilder m1(this, MachineType::Int32(), MachineType::Pointer());
    Node* p1 = m1.Parameter(0);
    m1.Return(m1.Load(MachineType::Int32(), p1, m1.Int32Constant(0)));
    Stream s1 = m1.Build(kAllInstructions);
    StreamBuilder m2(this, MachineType::Int32(), MachineType::Pointer());
    Node* p2 = m2.Parameter(0);
    m2.Return(m2.AddNode(
        m2.machine()->Load(MachineType::Int32()), p2, m2.Int32Constant(0),
        m2.AddNode(m2.common()->BeginRegion(RegionObservability::kObservable),
                   m2.graph()->start())));
    Stream s2 = m2.Build(kAllInstructions);
    EXPECT_LE(3U, s1.size());
    ASSERT_EQ(s1.size(), s2.size());
    TRACED_FORRANGE(size_t, i, 0, s1.size() - 1) {
      const Instruction* i1 = s1[i];
      const Instruction* i2 = s2[i];
      EXPECT_EQ(i1->arch_opcode(), i2->arch_opcode());
      EXPECT_EQ(i1->InputCount(), i2->InputCount());
      EXPECT_EQ(i1->OutputCount(), i2->OutputCount());
    }
  }
  
  
  // -----------------------------------------------------------------------------
  // Calls with deoptimization.
  
  
  TARGET_TEST_F(InstructionSelectorTest, CallJSFunctionWithDeopt) {
    StreamBuilder m(this, MachineType::AnyTagged(), MachineType::AnyTagged(),
                    MachineType::AnyTagged(), MachineType::AnyTagged());
  
    BailoutId bailout_id(42);
  
    Node* function_node = m.Parameter(0);
    Node* receiver = m.Parameter(1);
    Node* context = m.Parameter(2);
  
    ZoneVector<MachineType> int32_type(1, MachineType::Int32(), zone());
    ZoneVector<MachineType> empty_types(zone());
  
    CallDescriptor* descriptor = Linkage::GetJSCallDescriptor(
        zone(), false, 1, CallDescriptor::kNeedsFrameState);
  
    // Build frame state for the state before the call.
    Node* parameters =
        m.AddNode(m.common()->TypedStateValues(&int32_type), m.Int32Constant(1));
    Node* locals = m.AddNode(m.common()->TypedStateValues(&empty_types));
    Node* stack = m.AddNode(m.common()->TypedStateValues(&empty_types));
    Node* context_sentinel = m.Int32Constant(0);
    Node* state_node = m.AddNode(
        m.common()->FrameState(bailout_id, OutputFrameStateCombine::Push(),
                               m.GetFrameStateFunctionInfo(1, 0)),
        parameters, locals, stack, context_sentinel, function_node,
        m.UndefinedConstant());
  
    // Build the call.
    Node* args[] = {receiver, m.UndefinedConstant(), m.Int32Constant(1), context};
    Node* call =
        m.CallNWithFrameState(descriptor, function_node, args, state_node);
    m.Return(call);
  
    Stream s = m.Build(kAllExceptNopInstructions);
  
    // Skip until kArchCallJSFunction.
    size_t index = 0;
    for (; index < s.size() && s[index]->arch_opcode() != kArchCallJSFunction;
         index++) {
    }
    // Now we should have two instructions: call and return.
    ASSERT_EQ(index + 2, s.size());
  
    EXPECT_EQ(kArchCallJSFunction, s[index++]->arch_opcode());
    EXPECT_EQ(kArchRet, s[index++]->arch_opcode());
  
    // TODO(jarin) Check deoptimization table.
  }
  
  
  TARGET_TEST_F(InstructionSelectorTest, CallStubWithDeopt) {
    StreamBuilder m(this, MachineType::AnyTagged(), MachineType::AnyTagged(),
                    MachineType::AnyTagged(), MachineType::AnyTagged());
  
    BailoutId bailout_id_before(42);
  
    // Some arguments for the call node.
    Node* function_node = m.Parameter(0);
    Node* receiver = m.Parameter(1);
    Node* context = m.Int32Constant(1);  // Context is ignored.
  
    ZoneVector<MachineType> int32_type(1, MachineType::Int32(), zone());
    ZoneVector<MachineType> float64_type(1, MachineType::Float64(), zone());
    ZoneVector<MachineType> tagged_type(1, MachineType::AnyTagged(), zone());
  
    Callable callable = CodeFactory::ToObject(isolate());
    CallDescriptor* descriptor = Linkage::GetStubCallDescriptor(
        isolate(), zone(), callable.descriptor(), 1,
        CallDescriptor::kNeedsFrameState, Operator::kNoProperties);
  
    // Build frame state for the state before the call.
    Node* parameters =
        m.AddNode(m.common()->TypedStateValues(&int32_type), m.Int32Constant(43));
    Node* locals = m.AddNode(m.common()->TypedStateValues(&float64_type),
                             m.Float64Constant(0.5));
    Node* stack = m.AddNode(m.common()->TypedStateValues(&tagged_type),
                            m.UndefinedConstant());
    Node* context_sentinel = m.Int32Constant(0);
    Node* state_node = m.AddNode(
        m.common()->FrameState(bailout_id_before, OutputFrameStateCombine::Push(),
                               m.GetFrameStateFunctionInfo(1, 1)),
        parameters, locals, stack, context_sentinel, function_node,
        m.UndefinedConstant());
  
    // Build the call.
    Node* args[] = {function_node, receiver, context};
    Node* stub_code = m.HeapConstant(callable.code());
    Node* call = m.CallNWithFrameState(descriptor, stub_code, args, state_node);
    m.Return(call);
  
    Stream s = m.Build(kAllExceptNopInstructions);
  
    // Skip until kArchCallJSFunction.
    size_t index = 0;
    for (; index < s.size() && s[index]->arch_opcode() != kArchCallCodeObject;
         index++) {
    }
    // Now we should have two instructions: call, return.
    ASSERT_EQ(index + 2, s.size());
  
    // Check the call instruction
    const Instruction* call_instr = s[index++];
    EXPECT_EQ(kArchCallCodeObject, call_instr->arch_opcode());
    size_t num_operands =
        1 +  // Code object.
        1 +
        5 +  // Frame state deopt id + one input for each value in frame state.
        1 +  // Function.
        1;   // Context.
    ASSERT_EQ(num_operands, call_instr->InputCount());
  
    // Code object.
    EXPECT_TRUE(call_instr->InputAt(0)->IsImmediate());
  
    // Deoptimization id.
    int32_t deopt_id_before = s.ToInt32(call_instr->InputAt(1));
    FrameStateDescriptor* desc_before =
        s.GetFrameStateDescriptor(deopt_id_before);
    EXPECT_EQ(bailout_id_before, desc_before->bailout_id());
    EXPECT_EQ(OutputFrameStateCombine::kPushOutput,
              desc_before->state_combine().kind());
    EXPECT_EQ(1u, desc_before->parameters_count());
    EXPECT_EQ(1u, desc_before->locals_count());
    EXPECT_EQ(1u, desc_before->stack_count());
    EXPECT_EQ(43, s.ToInt32(call_instr->InputAt(3)));
    EXPECT_EQ(0, s.ToInt32(call_instr->InputAt(4)));  // This should be a context.
                                                      // We inserted 0 here.
    EXPECT_EQ(0.5, s.ToFloat64(call_instr->InputAt(5)));
    EXPECT_TRUE(s.ToHeapObject(call_instr->InputAt(6))->IsUndefined(isolate()));
    EXPECT_EQ(MachineType::AnyTagged(),
              desc_before->GetType(0));  // function is always
                                         // tagged/any.
    EXPECT_EQ(MachineType::Int32(), desc_before->GetType(1));
    EXPECT_EQ(MachineType::AnyTagged(),
              desc_before->GetType(2));  // context is always
                                         // tagged/any.
    EXPECT_EQ(MachineType::Float64(), desc_before->GetType(3));
    EXPECT_EQ(MachineType::AnyTagged(), desc_before->GetType(4));
  
    // Function.
    EXPECT_EQ(s.ToVreg(function_node), s.ToVreg(call_instr->InputAt(7)));
    // Context.
    EXPECT_EQ(s.ToVreg(context), s.ToVreg(call_instr->InputAt(8)));
  
    EXPECT_EQ(kArchRet, s[index++]->arch_opcode());
  
    EXPECT_EQ(index, s.size());
  }
  
  
  TARGET_TEST_F(InstructionSelectorTest, CallStubWithDeoptRecursiveFrameState) {
    StreamBuilder m(this, MachineType::AnyTagged(), MachineType::AnyTagged(),
                    MachineType::AnyTagged(), MachineType::AnyTagged());
  
    BailoutId bailout_id_before(42);
    BailoutId bailout_id_parent(62);
  
    // Some arguments for the call node.
    Node* function_node = m.Parameter(0);
    Node* receiver = m.Parameter(1);
    Node* context = m.Int32Constant(66);
    Node* context2 = m.Int32Constant(46);
  
    ZoneVector<MachineType> int32_type(1, MachineType::Int32(), zone());
    ZoneVector<MachineType> int32x2_type(2, MachineType::Int32(), zone());
    ZoneVector<MachineType> float64_type(1, MachineType::Float64(), zone());
  
    Callable callable = CodeFactory::ToObject(isolate());
    CallDescriptor* descriptor = Linkage::GetStubCallDescriptor(
        isolate(), zone(), callable.descriptor(), 1,
        CallDescriptor::kNeedsFrameState, Operator::kNoProperties);
  
    // Build frame state for the state before the call.
    Node* parameters =
        m.AddNode(m.common()->TypedStateValues(&int32_type), m.Int32Constant(63));
    Node* locals =
        m.AddNode(m.common()->TypedStateValues(&int32_type), m.Int32Constant(64));
    Node* stack =
        m.AddNode(m.common()->TypedStateValues(&int32_type), m.Int32Constant(65));
    Node* frame_state_parent = m.AddNode(
        m.common()->FrameState(bailout_id_parent,
                               OutputFrameStateCombine::Ignore(),
                               m.GetFrameStateFunctionInfo(1, 1)),
        parameters, locals, stack, context, function_node, m.UndefinedConstant());
  
    Node* parameters2 =
        m.AddNode(m.common()->TypedStateValues(&int32_type), m.Int32Constant(43));
    Node* locals2 = m.AddNode(m.common()->TypedStateValues(&float64_type),
                              m.Float64Constant(0.25));
    Node* stack2 = m.AddNode(m.common()->TypedStateValues(&int32x2_type),
                             m.Int32Constant(44), m.Int32Constant(45));
    Node* state_node = m.AddNode(
        m.common()->FrameState(bailout_id_before, OutputFrameStateCombine::Push(),
                               m.GetFrameStateFunctionInfo(1, 1)),
        parameters2, locals2, stack2, context2, function_node,
        frame_state_parent);
  
    // Build the call.
    Node* args[] = {function_node, receiver, context2};
    Node* stub_code = m.HeapConstant(callable.code());
    Node* call = m.CallNWithFrameState(descriptor, stub_code, args, state_node);
    m.Return(call);
  
    Stream s = m.Build(kAllExceptNopInstructions);
  
    // Skip until kArchCallJSFunction.
    size_t index = 0;
    for (; index < s.size() && s[index]->arch_opcode() != kArchCallCodeObject;
         index++) {
    }
    // Now we should have three instructions: call, return.
    EXPECT_EQ(index + 2, s.size());
  
    // Check the call instruction
    const Instruction* call_instr = s[index++];
    EXPECT_EQ(kArchCallCodeObject, call_instr->arch_opcode());
    size_t num_operands =
        1 +  // Code object.
        1 +  // Frame state deopt id
        6 +  // One input for each value in frame state + context.
        5 +  // One input for each value in the parent frame state + context.
        1 +  // Function.
        1;   // Context.
    EXPECT_EQ(num_operands, call_instr->InputCount());
    // Code object.
    EXPECT_TRUE(call_instr->InputAt(0)->IsImmediate());
  
    // Deoptimization id.
    int32_t deopt_id_before = s.ToInt32(call_instr->InputAt(1));
    FrameStateDescriptor* desc_before =
        s.GetFrameStateDescriptor(deopt_id_before);
    FrameStateDescriptor* desc_before_outer = desc_before->outer_state();
    EXPECT_EQ(bailout_id_before, desc_before->bailout_id());
    EXPECT_EQ(1u, desc_before_outer->parameters_count());
    EXPECT_EQ(1u, desc_before_outer->locals_count());
    EXPECT_EQ(1u, desc_before_outer->stack_count());
    // Values from parent environment.
    EXPECT_EQ(MachineType::AnyTagged(), desc_before->GetType(0));
    EXPECT_EQ(63, s.ToInt32(call_instr->InputAt(3)));
    EXPECT_EQ(MachineType::Int32(), desc_before_outer->GetType(1));
    // Context:
    EXPECT_EQ(66, s.ToInt32(call_instr->InputAt(4)));
    EXPECT_EQ(MachineType::AnyTagged(), desc_before_outer->GetType(2));
    EXPECT_EQ(64, s.ToInt32(call_instr->InputAt(5)));
    EXPECT_EQ(MachineType::Int32(), desc_before_outer->GetType(3));
    EXPECT_EQ(65, s.ToInt32(call_instr->InputAt(6)));
    EXPECT_EQ(MachineType::Int32(), desc_before_outer->GetType(4));
    // Values from the nested frame.
    EXPECT_EQ(1u, desc_before->parameters_count());
    EXPECT_EQ(1u, desc_before->locals_count());
    EXPECT_EQ(2u, desc_before->stack_count());
    EXPECT_EQ(MachineType::AnyTagged(), desc_before->GetType(0));
    EXPECT_EQ(43, s.ToInt32(call_instr->InputAt(8)));
    EXPECT_EQ(MachineType::Int32(), desc_before->GetType(1));
    EXPECT_EQ(46, s.ToInt32(call_instr->InputAt(9)));
    EXPECT_EQ(MachineType::AnyTagged(), desc_before->GetType(2));
    EXPECT_EQ(0.25, s.ToFloat64(call_instr->InputAt(10)));
    EXPECT_EQ(MachineType::Float64(), desc_before->GetType(3));
    EXPECT_EQ(44, s.ToInt32(call_instr->InputAt(11)));
    EXPECT_EQ(MachineType::Int32(), desc_before->GetType(4));
    EXPECT_EQ(45, s.ToInt32(call_instr->InputAt(12)));
    EXPECT_EQ(MachineType::Int32(), desc_before->GetType(5));
  
    // Function.
    EXPECT_EQ(s.ToVreg(function_node), s.ToVreg(call_instr->InputAt(13)));
    // Context.
    EXPECT_EQ(s.ToVreg(context2), s.ToVreg(call_instr->InputAt(14)));
    // Continuation.
  
    EXPECT_EQ(kArchRet, s[index++]->arch_opcode());
    EXPECT_EQ(index, s.size());
  }
  
  }  // namespace compiler
  }  // namespace internal
  }  // namespace v8
  