v8/test/unittests/compiler/x64/instruction-selector-x64-unittest.cc

// 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 <limits>

#include "src/common/globals.h"
#include "src/compiler/node-matchers.h"
#include "src/objects/objects-inl.h"
#include "test/unittests/compiler/backend/instruction-selector-unittest.h"

#if V8_ENABLE_WEBASSEMBLY
#include "src/wasm/simd-shuffle.h"
#endif  // V8_ENABLE_WEBASSEMBLY

namespace v8 {
namespace internal {
namespace compiler {

// -----------------------------------------------------------------------------
// Conversions.


TEST_F(InstructionSelectorTest, ChangeFloat32ToFloat64WithParameter) {
  StreamBuilder m(this, MachineType::Float32(), MachineType::Float64());
  m.Return(m.ChangeFloat32ToFloat64(m.Parameter(0)));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kSSEFloat32ToFloat64, s[0]->arch_opcode());
  EXPECT_EQ(1U, s[0]->InputCount());
  EXPECT_EQ(1U, s[0]->OutputCount());
}


TEST_F(InstructionSelectorTest, ChangeInt32ToInt64WithParameter) {
  StreamBuilder m(this, MachineType::Int64(), MachineType::Int32());
  m.Return(m.ChangeInt32ToInt64(m.Parameter(0)));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Movsxlq, s[0]->arch_opcode());
}

TEST_F(InstructionSelectorTest, ChangeUint32ToFloat64WithParameter) {
  StreamBuilder m(this, MachineType::Float64(), MachineType::Uint32());
  m.Return(m.ChangeUint32ToFloat64(m.Parameter(0)));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kSSEUint32ToFloat64, s[0]->arch_opcode());
}


TEST_F(InstructionSelectorTest, ChangeUint32ToUint64WithParameter) {
  StreamBuilder m(this, MachineType::Uint64(), MachineType::Uint32());
  m.Return(m.ChangeUint32ToUint64(m.Parameter(0)));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Movl, s[0]->arch_opcode());
}


TEST_F(InstructionSelectorTest, TruncateFloat64ToFloat32WithParameter) {
  StreamBuilder m(this, MachineType::Float64(), MachineType::Float32());
  m.Return(m.TruncateFloat64ToFloat32(m.Parameter(0)));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kSSEFloat64ToFloat32, s[0]->arch_opcode());
  EXPECT_EQ(1U, s[0]->InputCount());
  EXPECT_EQ(1U, s[0]->OutputCount());
}


TEST_F(InstructionSelectorTest, TruncateInt64ToInt32WithParameter) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int64());
  m.Return(m.TruncateInt64ToInt32(m.Parameter(0)));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Movl, s[0]->arch_opcode());
}

namespace {
struct LoadWithToInt64Extension {
  MachineType type;
  ArchOpcode expected_opcode;
};

std::ostream& operator<<(std::ostream& os,
                         const LoadWithToInt64Extension& i32toi64) {
  return os << i32toi64.type;
}

static const LoadWithToInt64Extension kLoadWithToInt64Extensions[] = {
    {MachineType::Int8(), kX64Movsxbq},
    {MachineType::Uint8(), kX64Movzxbq},
    {MachineType::Int16(), kX64Movsxwq},
    {MachineType::Uint16(), kX64Movzxwq},
    {MachineType::Int32(), kX64Movsxlq}};

// The parameterized test that use the following type are intentionally part
// of the anonymous namespace. The issue here is that the type parameter is
// using a type that is in the anonymous namespace, but the class generated by
// TEST_P is not. This will cause GCC to generate a -Wsubobject-linkage warning.
//
// In this case there will only be single translation unit and the warning
// about subobject-linkage can be avoided by placing the class generated
// by TEST_P in the anoynmous namespace as well.
using InstructionSelectorChangeInt32ToInt64Test =
    InstructionSelectorTestWithParam<LoadWithToInt64Extension>;

TEST_P(InstructionSelectorChangeInt32ToInt64Test, ChangeInt32ToInt64WithLoad) {
  const LoadWithToInt64Extension extension = GetParam();
  StreamBuilder m(this, MachineType::Int64(), MachineType::Pointer());
  m.Return(m.ChangeInt32ToInt64(m.Load(extension.type, m.Parameter(0))));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(extension.expected_opcode, s[0]->arch_opcode());
}

}  // namespace

INSTANTIATE_TEST_SUITE_P(InstructionSelectorTest,
                         InstructionSelectorChangeInt32ToInt64Test,
                         ::testing::ValuesIn(kLoadWithToInt64Extensions));

// -----------------------------------------------------------------------------
// Loads and stores


namespace {

struct MemoryAccess {
  MachineType type;
  ArchOpcode load_opcode;
  ArchOpcode store_opcode;
};


std::ostream& operator<<(std::ostream& os, const MemoryAccess& memacc) {
  return os << memacc.type;
}


static const MemoryAccess kMemoryAccesses[] = {
    {MachineType::Int8(), kX64Movsxbl, kX64Movb},
    {MachineType::Uint8(), kX64Movzxbl, kX64Movb},
    {MachineType::Int16(), kX64Movsxwl, kX64Movw},
    {MachineType::Uint16(), kX64Movzxwl, kX64Movw},
    {MachineType::Int32(), kX64Movl, kX64Movl},
    {MachineType::Uint32(), kX64Movl, kX64Movl},
    {MachineType::Int64(), kX64Movq, kX64Movq},
    {MachineType::Uint64(), kX64Movq, kX64Movq},
    {MachineType::Float32(), kX64Movss, kX64Movss},
    {MachineType::Float64(), kX64Movsd, kX64Movsd}};

// The parameterized test that use the following type are intentionally part
// of the anonymous namespace. The issue here is that the type parameter is
// using a type that is in the anonymous namespace, but the class generated by
// TEST_P is not. This will cause GCC to generate a -Wsubobject-linkage warning.
//
// In this case there will only be single translation unit and the warning
// about subobject-linkage can be avoided by placing the class generated
// by TEST_P in the anoynmous namespace as well.
using InstructionSelectorMemoryAccessTest =
    InstructionSelectorTestWithParam<MemoryAccess>;

TEST_P(InstructionSelectorMemoryAccessTest, LoadWithParameters) {
  const MemoryAccess memacc = GetParam();
  StreamBuilder m(this, memacc.type, MachineType::Pointer(),
                  MachineType::Int32());
  m.Return(m.Load(memacc.type, m.Parameter(0), m.Parameter(1)));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(memacc.load_opcode, s[0]->arch_opcode());
  EXPECT_EQ(2U, s[0]->InputCount());
  EXPECT_EQ(1U, s[0]->OutputCount());
}


TEST_P(InstructionSelectorMemoryAccessTest, StoreWithParameters) {
  const MemoryAccess memacc = GetParam();
  StreamBuilder m(this, MachineType::Int32(), MachineType::Pointer(),
                  MachineType::Int32(), memacc.type);
  m.Store(memacc.type.representation(), m.Parameter(0), m.Parameter(1),
          m.Parameter(2), kNoWriteBarrier);
  m.Return(m.Int32Constant(0));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(memacc.store_opcode, s[0]->arch_opcode());
  EXPECT_EQ(3U, s[0]->InputCount());
  EXPECT_EQ(0U, s[0]->OutputCount());
}

}  // namespace

INSTANTIATE_TEST_SUITE_P(InstructionSelectorTest,
                         InstructionSelectorMemoryAccessTest,
                         ::testing::ValuesIn(kMemoryAccesses));

// -----------------------------------------------------------------------------
// ChangeUint32ToUint64.


namespace {

using Constructor = Node* (RawMachineAssembler::*)(Node*, Node*);

struct BinaryOperation {
  Constructor constructor;
  const char* constructor_name;
};


std::ostream& operator<<(std::ostream& os, const BinaryOperation& bop) {
  return os << bop.constructor_name;
}


const BinaryOperation kWord32BinaryOperations[] = {
    {&RawMachineAssembler::Word32And, "Word32And"},
    {&RawMachineAssembler::Word32Or, "Word32Or"},
    {&RawMachineAssembler::Word32Xor, "Word32Xor"},
    {&RawMachineAssembler::Word32Shl, "Word32Shl"},
    {&RawMachineAssembler::Word32Shr, "Word32Shr"},
    {&RawMachineAssembler::Word32Sar, "Word32Sar"},
    {&RawMachineAssembler::Word32Ror, "Word32Ror"},
    {&RawMachineAssembler::Word32Equal, "Word32Equal"},
    {&RawMachineAssembler::Int32Add, "Int32Add"},
    {&RawMachineAssembler::Int32Sub, "Int32Sub"},
    {&RawMachineAssembler::Int32Mul, "Int32Mul"},
    {&RawMachineAssembler::Int32MulHigh, "Int32MulHigh"},
    {&RawMachineAssembler::Int32Div, "Int32Div"},
    {&RawMachineAssembler::Int32LessThan, "Int32LessThan"},
    {&RawMachineAssembler::Int32LessThanOrEqual, "Int32LessThanOrEqual"},
    {&RawMachineAssembler::Int32Mod, "Int32Mod"},
    {&RawMachineAssembler::Uint32Div, "Uint32Div"},
    {&RawMachineAssembler::Uint32LessThan, "Uint32LessThan"},
    {&RawMachineAssembler::Uint32LessThanOrEqual, "Uint32LessThanOrEqual"},
    {&RawMachineAssembler::Uint32Mod, "Uint32Mod"}};

// The parameterized test that use the following type are intentionally part
// of the anonymous namespace. The issue here is that the type parameter is
// using a type that is in the anonymous namespace, but the class generated by
// TEST_P is not. This will cause GCC to generate a -Wsubobject-linkage warning.
//
// In this case there will only be single translation unit and the warning
// about subobject-linkage can be avoided by placing the class generated
// by TEST_P in the anoynmous namespace as well.
using InstructionSelectorChangeUint32ToUint64Test =
    InstructionSelectorTestWithParam<BinaryOperation>;

TEST_P(InstructionSelectorChangeUint32ToUint64Test, ChangeUint32ToUint64) {
  const BinaryOperation& bop = GetParam();
  StreamBuilder m(this, MachineType::Uint64(), MachineType::Int32(),
                  MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  m.Return(m.ChangeUint32ToUint64((m.*bop.constructor)(p0, p1)));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
}

}  // namespace

INSTANTIATE_TEST_SUITE_P(InstructionSelectorTest,
                         InstructionSelectorChangeUint32ToUint64Test,
                         ::testing::ValuesIn(kWord32BinaryOperations));

// -----------------------------------------------------------------------------
// CanElideChangeUint32ToUint64

namespace {

template <typename T>
struct MachInst {
  T constructor;
  const char* constructor_name;
  ArchOpcode arch_opcode;
  MachineType machine_type;
};

using MachInst2 = MachInst<Node* (RawMachineAssembler::*)(Node*, Node*)>;

// X64 instructions that clear the top 32 bits of the destination.
const MachInst2 kCanElideChangeUint32ToUint64[] = {
    {&RawMachineAssembler::Word32And, "Word32And", kX64And32,
     MachineType::Uint32()},
    {&RawMachineAssembler::Word32Or, "Word32Or", kX64Or32,
     MachineType::Uint32()},
    {&RawMachineAssembler::Word32Xor, "Word32Xor", kX64Xor32,
     MachineType::Uint32()},
    {&RawMachineAssembler::Word32Shl, "Word32Shl", kX64Shl32,
     MachineType::Uint32()},
    {&RawMachineAssembler::Word32Shr, "Word32Shr", kX64Shr32,
     MachineType::Uint32()},
    {&RawMachineAssembler::Word32Sar, "Word32Sar", kX64Sar32,
     MachineType::Uint32()},
    {&RawMachineAssembler::Word32Ror, "Word32Ror", kX64Ror32,
     MachineType::Uint32()},
    {&RawMachineAssembler::Word32Equal, "Word32Equal", kX64Cmp32,
     MachineType::Uint32()},
    {&RawMachineAssembler::Int32Add, "Int32Add", kX64Lea32,
     MachineType::Int32()},
    {&RawMachineAssembler::Int32Sub, "Int32Sub", kX64Sub32,
     MachineType::Int32()},
    {&RawMachineAssembler::Int32Mul, "Int32Mul", kX64Imul32,
     MachineType::Int32()},
    {&RawMachineAssembler::Int32MulHigh, "Int32MulHigh", kX64ImulHigh32,
     MachineType::Int32()},
    {&RawMachineAssembler::Int32Div, "Int32Div", kX64Idiv32,
     MachineType::Int32()},
    {&RawMachineAssembler::Int32LessThan, "Int32LessThan", kX64Cmp32,
     MachineType::Int32()},
    {&RawMachineAssembler::Int32LessThanOrEqual, "Int32LessThanOrEqual",
     kX64Cmp32, MachineType::Int32()},
    {&RawMachineAssembler::Int32Mod, "Int32Mod", kX64Idiv32,
     MachineType::Int32()},
    {&RawMachineAssembler::Uint32Div, "Uint32Div", kX64Udiv32,
     MachineType::Uint32()},
    {&RawMachineAssembler::Uint32LessThan, "Uint32LessThan", kX64Cmp32,
     MachineType::Uint32()},
    {&RawMachineAssembler::Uint32LessThanOrEqual, "Uint32LessThanOrEqual",
     kX64Cmp32, MachineType::Uint32()},
    {&RawMachineAssembler::Uint32Mod, "Uint32Mod", kX64Udiv32,
     MachineType::Uint32()},
};

// The parameterized test that use the following type are intentionally part
// of the anonymous namespace. The issue here is that the type parameter is
// using a type that is in the anonymous namespace, but the class generated by
// TEST_P is not. This will cause GCC to generate a -Wsubobject-linkage warning.
//
// In this case there will only be single translation unit and the warning
// about subobject-linkage can be avoided by placing the class generated
// by TEST_P in the anoynmous namespace as well.
using InstructionSelectorElidedChangeUint32ToUint64Test =
    InstructionSelectorTestWithParam<MachInst2>;

TEST_P(InstructionSelectorElidedChangeUint32ToUint64Test, Parameter) {
  const MachInst2 binop = GetParam();
  StreamBuilder m(this, MachineType::Uint64(), binop.machine_type,
                  binop.machine_type);
  m.Return(m.ChangeUint32ToUint64(
      (m.*binop.constructor)(m.Parameter(0), m.Parameter(1))));
  Stream s = m.Build();
  // Make sure the `ChangeUint32ToUint64` node turned into a no-op.
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(binop.arch_opcode, s[0]->arch_opcode());
  EXPECT_EQ(2U, s[0]->InputCount());
  EXPECT_EQ(1U, s[0]->OutputCount());
}

}  // namespace

INSTANTIATE_TEST_SUITE_P(InstructionSelectorTest,
                         InstructionSelectorElidedChangeUint32ToUint64Test,
                         ::testing::ValuesIn(kCanElideChangeUint32ToUint64));

// ChangeUint32ToUint64AfterLoad
TEST_F(InstructionSelectorTest, ChangeUint32ToUint64AfterLoad) {
  // For each case, make sure the `ChangeUint32ToUint64` node turned into a
  // no-op.

  // movzxbl
  {
    StreamBuilder m(this, MachineType::Uint64(), MachineType::Pointer(),
                    MachineType::Int32());
    m.Return(m.ChangeUint32ToUint64(
        m.Load(MachineType::Uint8(), m.Parameter(0), m.Parameter(1))));
    Stream s = m.Build();
    ASSERT_EQ(1U, s.size());
    EXPECT_EQ(kX64Movzxbl, s[0]->arch_opcode());
    EXPECT_EQ(kMode_MR1, s[0]->addressing_mode());
    EXPECT_EQ(2U, s[0]->InputCount());
    EXPECT_EQ(1U, s[0]->OutputCount());
  }
  // movsxbl
  {
    StreamBuilder m(this, MachineType::Uint64(), MachineType::Pointer(),
                    MachineType::Int32());
    m.Return(m.ChangeUint32ToUint64(
        m.Load(MachineType::Int8(), m.Parameter(0), m.Parameter(1))));
    Stream s = m.Build();
    ASSERT_EQ(1U, s.size());
    EXPECT_EQ(kX64Movsxbl, s[0]->arch_opcode());
    EXPECT_EQ(kMode_MR1, s[0]->addressing_mode());
    EXPECT_EQ(2U, s[0]->InputCount());
    EXPECT_EQ(1U, s[0]->OutputCount());
  }
  // movzxwl
  {
    StreamBuilder m(this, MachineType::Uint64(), MachineType::Pointer(),
                    MachineType::Int32());
    m.Return(m.ChangeUint32ToUint64(
        m.Load(MachineType::Uint16(), m.Parameter(0), m.Parameter(1))));
    Stream s = m.Build();
    ASSERT_EQ(1U, s.size());
    EXPECT_EQ(kX64Movzxwl, s[0]->arch_opcode());
    EXPECT_EQ(kMode_MR1, s[0]->addressing_mode());
    EXPECT_EQ(2U, s[0]->InputCount());
    EXPECT_EQ(1U, s[0]->OutputCount());
  }
  // movsxwl
  {
    StreamBuilder m(this, MachineType::Uint64(), MachineType::Pointer(),
                    MachineType::Int32());
    m.Return(m.ChangeUint32ToUint64(
        m.Load(MachineType::Int16(), m.Parameter(0), m.Parameter(1))));
    Stream s = m.Build();
    ASSERT_EQ(1U, s.size());
    EXPECT_EQ(kX64Movsxwl, s[0]->arch_opcode());
    EXPECT_EQ(kMode_MR1, s[0]->addressing_mode());
    EXPECT_EQ(2U, s[0]->InputCount());
    EXPECT_EQ(1U, s[0]->OutputCount());
  }
}

// -----------------------------------------------------------------------------
// TruncateInt64ToInt32.


TEST_F(InstructionSelectorTest, TruncateInt64ToInt32WithWord64Sar) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int64());
  Node* const p = m.Parameter(0);
  Node* const t = m.TruncateInt64ToInt32(m.Word64Sar(p, m.Int64Constant(32)));
  m.Return(t);
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Shr, s[0]->arch_opcode());
  ASSERT_EQ(2U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(32, s.ToInt32(s[0]->InputAt(1)));
  ASSERT_EQ(1U, s[0]->OutputCount());
  EXPECT_TRUE(s.IsSameAsFirst(s[0]->OutputAt(0)));
  EXPECT_EQ(s.ToVreg(t), s.ToVreg(s[0]->OutputAt(0)));
}


TEST_F(InstructionSelectorTest, TruncateInt64ToInt32WithWord64Shr) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int64());
  Node* const p = m.Parameter(0);
  Node* const t = m.TruncateInt64ToInt32(m.Word64Shr(p, m.Int64Constant(32)));
  m.Return(t);
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Shr, s[0]->arch_opcode());
  ASSERT_EQ(2U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(32, s.ToInt32(s[0]->InputAt(1)));
  ASSERT_EQ(1U, s[0]->OutputCount());
  EXPECT_TRUE(s.IsSameAsFirst(s[0]->OutputAt(0)));
  EXPECT_EQ(s.ToVreg(t), s.ToVreg(s[0]->OutputAt(0)));
}


// -----------------------------------------------------------------------------
// Addition.


TEST_F(InstructionSelectorTest, Int32AddWithInt32ParametersLea) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32(),
                  MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  Node* const a0 = m.Int32Add(p0, p1);
  // Additional uses of input to add chooses lea
  Node* const a1 = m.Int32Div(p0, p1);
  m.Return(m.Int32Div(a0, a1));
  Stream s = m.Build();
  ASSERT_EQ(3U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  ASSERT_EQ(2U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
}


TEST_F(InstructionSelectorTest, Int32AddConstantAsLeaSingle) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const c0 = m.Int32Constant(15);
  // If one of the add's operands is only used once, use an "leal", even though
  // an "addl" could be used. The "leal" has proven faster--out best guess is
  // that it gives the register allocation more freedom and it doesn't set
  // flags, reducing pressure in the CPU's pipeline. If we're lucky with
  // register allocation, then code generation will select an "addl" later for
  // the cases that have been measured to be faster.
  Node* const v0 = m.Int32Add(p0, c0);
  m.Return(v0);
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_MRI, s[0]->addressing_mode());
  ASSERT_EQ(2U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_TRUE(s[0]->InputAt(1)->IsImmediate());
}


TEST_F(InstructionSelectorTest, Int32AddConstantAsAdd) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const c0 = m.Int32Constant(1);
  // If there is only a single use of an add's input and the immediate constant
  // for the add is 1, don't use an inc. It is much slower on modern Intel
  // architectures.
  m.Return(m.Int32Add(p0, c0));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_MRI, s[0]->addressing_mode());
  ASSERT_EQ(2U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_TRUE(s[0]->InputAt(1)->IsImmediate());
}


TEST_F(InstructionSelectorTest, Int32AddConstantAsLeaDouble) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const c0 = m.Int32Constant(15);
  // A second use of an add's input uses lea
  Node* const a0 = m.Int32Add(p0, c0);
  m.Return(m.Int32Div(a0, p0));
  Stream s = m.Build();
  ASSERT_EQ(2U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_MRI, s[0]->addressing_mode());
  ASSERT_EQ(2U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_TRUE(s[0]->InputAt(1)->IsImmediate());
}


TEST_F(InstructionSelectorTest, Int32AddCommutedConstantAsLeaSingle) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const c0 = m.Int32Constant(15);
  // If one of the add's operands is only used once, use an "leal", even though
  // an "addl" could be used. The "leal" has proven faster--out best guess is
  // that it gives the register allocation more freedom and it doesn't set
  // flags, reducing pressure in the CPU's pipeline. If we're lucky with
  // register allocation, then code generation will select an "addl" later for
  // the cases that have been measured to be faster.
  m.Return(m.Int32Add(c0, p0));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_MRI, s[0]->addressing_mode());
  ASSERT_EQ(2U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_TRUE(s[0]->InputAt(1)->IsImmediate());
}


TEST_F(InstructionSelectorTest, Int32AddCommutedConstantAsLeaDouble) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const c0 = m.Int32Constant(15);
  // A second use of an add's input uses lea
  Node* const a0 = m.Int32Add(c0, p0);
  USE(a0);
  m.Return(m.Int32Div(a0, p0));
  Stream s = m.Build();
  ASSERT_EQ(2U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_MRI, s[0]->addressing_mode());
  ASSERT_EQ(2U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_TRUE(s[0]->InputAt(1)->IsImmediate());
}


TEST_F(InstructionSelectorTest, Int32AddSimpleAsAdd) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32(),
                  MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  // If one of the add's operands is only used once, use an "leal", even though
  // an "addl" could be used. The "leal" has proven faster--out best guess is
  // that it gives the register allocation more freedom and it doesn't set
  // flags, reducing pressure in the CPU's pipeline. If we're lucky with
  // register allocation, then code generation will select an "addl" later for
  // the cases that have been measured to be faster.
  m.Return(m.Int32Add(p0, p1));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_MR1, s[0]->addressing_mode());
  ASSERT_EQ(2U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
}


TEST_F(InstructionSelectorTest, Int32AddSimpleAsLea) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32(),
                  MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  // If all of of the add's operands are used multiple times, use an "leal".
  Node* const v1 = m.Int32Add(p0, p1);
  m.Return(m.Int32Add(m.Int32Add(v1, p1), p0));
  Stream s = m.Build();
  ASSERT_EQ(3U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_MR1, s[0]->addressing_mode());
  ASSERT_EQ(2U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
}


TEST_F(InstructionSelectorTest, Int32AddScaled2Mul) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32(),
                  MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  Node* const s0 = m.Int32Mul(p1, m.Int32Constant(2));
  m.Return(m.Int32Add(p0, s0));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_MR2, s[0]->addressing_mode());
  ASSERT_EQ(2U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
}


TEST_F(InstructionSelectorTest, Int32AddCommutedScaled2Mul) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32(),
                  MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  Node* const s0 = m.Int32Mul(p1, m.Int32Constant(2));
  m.Return(m.Int32Add(s0, p0));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_MR2, s[0]->addressing_mode());
  ASSERT_EQ(2U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
}


TEST_F(InstructionSelectorTest, Int32AddScaled2Shl) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32(),
                  MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  Node* const s0 = m.Word32Shl(p1, m.Int32Constant(1));
  m.Return(m.Int32Add(p0, s0));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_MR2, s[0]->addressing_mode());
  ASSERT_EQ(2U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
}


TEST_F(InstructionSelectorTest, Int32AddCommutedScaled2Shl) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32(),
                  MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  Node* const s0 = m.Word32Shl(p1, m.Int32Constant(1));
  m.Return(m.Int32Add(s0, p0));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_MR2, s[0]->addressing_mode());
  ASSERT_EQ(2U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
}


TEST_F(InstructionSelectorTest, Int32AddScaled4Mul) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32(),
                  MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  Node* const s0 = m.Int32Mul(p1, m.Int32Constant(4));
  m.Return(m.Int32Add(p0, s0));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_MR4, s[0]->addressing_mode());
  ASSERT_EQ(2U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
}


TEST_F(InstructionSelectorTest, Int32AddScaled4Shl) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32(),
                  MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  Node* const s0 = m.Word32Shl(p1, m.Int32Constant(2));
  m.Return(m.Int32Add(p0, s0));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_MR4, s[0]->addressing_mode());
  ASSERT_EQ(2U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
}


TEST_F(InstructionSelectorTest, Int32AddScaled8Mul) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32(),
                  MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  Node* const s0 = m.Int32Mul(p1, m.Int32Constant(8));
  m.Return(m.Int32Add(p0, s0));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_MR8, s[0]->addressing_mode());
  ASSERT_EQ(2U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
}


TEST_F(InstructionSelectorTest, Int32AddScaled8Shl) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32(),
                  MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  Node* const s0 = m.Word32Shl(p1, m.Int32Constant(3));
  m.Return(m.Int32Add(p0, s0));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_MR8, s[0]->addressing_mode());
  ASSERT_EQ(2U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
}


TEST_F(InstructionSelectorTest, Int32AddScaled2MulWithConstant) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32(),
                  MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  Node* const s0 = m.Int32Mul(p1, m.Int32Constant(2));
  Node* const c0 = m.Int32Constant(15);
  m.Return(m.Int32Add(c0, m.Int32Add(p0, s0)));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_MR2I, s[0]->addressing_mode());
  ASSERT_EQ(3U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
  EXPECT_TRUE(s[0]->InputAt(2)->IsImmediate());
}


TEST_F(InstructionSelectorTest, Int32AddScaled2MulWithConstantShuffle1) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32(),
                  MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  Node* const s0 = m.Int32Mul(p1, m.Int32Constant(2));
  Node* const c0 = m.Int32Constant(15);
  m.Return(m.Int32Add(p0, m.Int32Add(s0, c0)));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_MR2I, s[0]->addressing_mode());
  ASSERT_EQ(3U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
  EXPECT_TRUE(s[0]->InputAt(2)->IsImmediate());
}


TEST_F(InstructionSelectorTest, Int32AddScaled2MulWithConstantShuffle2) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32(),
                  MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  Node* const s0 = m.Int32Mul(p1, m.Int32Constant(2));
  Node* const c0 = m.Int32Constant(15);
  m.Return(m.Int32Add(s0, m.Int32Add(c0, p0)));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_MR2I, s[0]->addressing_mode());
  ASSERT_EQ(3U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
  EXPECT_TRUE(s[0]->InputAt(2)->IsImmediate());
}


TEST_F(InstructionSelectorTest, Int32AddScaled2MulWithConstantShuffle3) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32(),
                  MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  Node* const s0 = m.Int32Mul(p1, m.Int32Constant(2));
  Node* const c0 = m.Int32Constant(15);
  m.Return(m.Int32Add(m.Int32Add(s0, c0), p0));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_MR2I, s[0]->addressing_mode());
  ASSERT_EQ(3U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
  EXPECT_TRUE(s[0]->InputAt(2)->IsImmediate());
}


TEST_F(InstructionSelectorTest, Int32AddScaled2MulWithConstantShuffle4) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32(),
                  MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  Node* const s0 = m.Int32Mul(p1, m.Int32Constant(2));
  Node* const c0 = m.Int32Constant(15);
  m.Return(m.Int32Add(m.Int32Add(c0, p0), s0));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_MR2I, s[0]->addressing_mode());
  ASSERT_EQ(3U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
  EXPECT_TRUE(s[0]->InputAt(2)->IsImmediate());
}


TEST_F(InstructionSelectorTest, Int32AddScaled2MulWithConstantShuffle5) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32(),
                  MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  Node* const s0 = m.Int32Mul(p1, m.Int32Constant(2));
  Node* const c0 = m.Int32Constant(15);
  m.Return(m.Int32Add(m.Int32Add(p0, s0), c0));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_MR2I, s[0]->addressing_mode());
  ASSERT_EQ(3U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
  EXPECT_TRUE(s[0]->InputAt(2)->IsImmediate());
}


TEST_F(InstructionSelectorTest, Int32AddScaled2ShlWithConstant) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32(),
                  MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  Node* const s0 = m.Word32Shl(p1, m.Int32Constant(1));
  Node* const c0 = m.Int32Constant(15);
  m.Return(m.Int32Add(c0, m.Int32Add(p0, s0)));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_MR2I, s[0]->addressing_mode());
  ASSERT_EQ(3U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
  EXPECT_TRUE(s[0]->InputAt(2)->IsImmediate());
}


TEST_F(InstructionSelectorTest, Int32AddScaled4MulWithConstant) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32(),
                  MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  Node* const s0 = m.Int32Mul(p1, m.Int32Constant(4));
  Node* const c0 = m.Int32Constant(15);
  m.Return(m.Int32Add(c0, m.Int32Add(p0, s0)));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_MR4I, s[0]->addressing_mode());
  ASSERT_EQ(3U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
  EXPECT_TRUE(s[0]->InputAt(2)->IsImmediate());
}


TEST_F(InstructionSelectorTest, Int32AddScaled4ShlWithConstant) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32(),
                  MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  Node* const s0 = m.Word32Shl(p1, m.Int32Constant(2));
  Node* const c0 = m.Int32Constant(15);
  m.Return(m.Int32Add(c0, m.Int32Add(p0, s0)));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_MR4I, s[0]->addressing_mode());
  ASSERT_EQ(3U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
  EXPECT_TRUE(s[0]->InputAt(2)->IsImmediate());
}


TEST_F(InstructionSelectorTest, Int32AddScaled8MulWithConstant) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32(),
                  MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  Node* const s0 = m.Int32Mul(p1, m.Int32Constant(8));
  Node* const c0 = m.Int32Constant(15);
  m.Return(m.Int32Add(c0, m.Int32Add(p0, s0)));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_MR8I, s[0]->addressing_mode());
  ASSERT_EQ(3U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
  EXPECT_TRUE(s[0]->InputAt(2)->IsImmediate());
}


TEST_F(InstructionSelectorTest, Int32AddScaled8ShlWithConstant) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32(),
                  MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  Node* const s0 = m.Word32Shl(p1, m.Int32Constant(3));
  Node* const c0 = m.Int32Constant(15);
  m.Return(m.Int32Add(c0, m.Int32Add(p0, s0)));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_MR8I, s[0]->addressing_mode());
  ASSERT_EQ(3U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
  EXPECT_TRUE(s[0]->InputAt(2)->IsImmediate());
}


TEST_F(InstructionSelectorTest, Int32SubConstantAsSub) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const c0 = m.Int32Constant(-1);
  // If there is only a single use of on of the sub's non-constant input, use a
  // "subl" instruction.
  m.Return(m.Int32Sub(p0, c0));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_MRI, s[0]->addressing_mode());
  ASSERT_EQ(2U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_TRUE(s[0]->InputAt(1)->IsImmediate());
}


TEST_F(InstructionSelectorTest, Int32SubConstantAsLea) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const c0 = m.Int32Constant(-1);
  // If there are multiple uses of on of the sub's non-constant input, use a
  // "leal" instruction.
  Node* const v0 = m.Int32Sub(p0, c0);
  m.Return(m.Int32Div(p0, v0));
  Stream s = m.Build();
  ASSERT_EQ(2U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_MRI, s[0]->addressing_mode());
  ASSERT_EQ(2U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_TRUE(s[0]->InputAt(1)->IsImmediate());
}


TEST_F(InstructionSelectorTest, Int32AddScaled2Other) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32(),
                  MachineType::Int32(), MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  Node* const p2 = m.Parameter(2);
  Node* const s0 = m.Int32Mul(p1, m.Int32Constant(2));
  Node* const a0 = m.Int32Add(s0, p2);
  Node* const a1 = m.Int32Add(p0, a0);
  m.Return(a1);
  Stream s = m.Build();
  ASSERT_EQ(2U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_MR2, s[0]->addressing_mode());
  ASSERT_EQ(2U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p2), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
  EXPECT_EQ(s.ToVreg(a0), s.ToVreg(s[0]->OutputAt(0)));
  ASSERT_EQ(2U, s[1]->InputCount());
  EXPECT_EQ(kX64Lea32, s[1]->arch_opcode());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[1]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(a0), s.ToVreg(s[1]->InputAt(1)));
  EXPECT_EQ(s.ToVreg(a1), s.ToVreg(s[1]->OutputAt(0)));
}

TEST_F(InstructionSelectorTest, Int32AddMinNegativeDisplacement) {
  // This test case is simplified from a Wasm fuzz test in
  // https://crbug.com/1091892. The key here is that we match on a
  // sequence like: Int32Add(Int32Sub(-524288, -2147483648), -26048), which
  // matches on an EmitLea, with -2147483648 as the displacement. Since we
  // have a Int32Sub node, it sets kNegativeDisplacement, and later we try to
  // negate -2147483648, which overflows.
  StreamBuilder m(this, MachineType::Int32());
  Node* const c0 = m.Int32Constant(-524288);
  Node* const c1 = m.Int32Constant(std::numeric_limits<int32_t>::min());
  Node* const c2 = m.Int32Constant(-26048);
  Node* const a0 = m.Int32Sub(c0, c1);
  Node* const a1 = m.Int32Add(a0, c2);
  m.Return(a1);
  Stream s = m.Build();
  ASSERT_EQ(2U, s.size());

  EXPECT_EQ(kX64Sub32, s[0]->arch_opcode());
  ASSERT_EQ(2U, s[0]->InputCount());
  EXPECT_EQ(kMode_None, s[0]->addressing_mode());
  EXPECT_EQ(s.ToVreg(c0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(c1), s.ToVreg(s[0]->InputAt(1)));
  EXPECT_EQ(s.ToVreg(a0), s.ToVreg(s[0]->OutputAt(0)));

  EXPECT_EQ(kX64Add32, s[1]->arch_opcode());
  ASSERT_EQ(2U, s[1]->InputCount());
  EXPECT_EQ(kMode_None, s[1]->addressing_mode());
  EXPECT_EQ(s.ToVreg(a0), s.ToVreg(s[1]->InputAt(0)));
  EXPECT_TRUE(s[1]->InputAt(1)->IsImmediate());
  EXPECT_EQ(s.ToVreg(a1), s.ToVreg(s[1]->OutputAt(0)));
}

// -----------------------------------------------------------------------------
// Multiplication.


TEST_F(InstructionSelectorTest, Int32MulWithInt32MulWithParameters) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32(),
                  MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  Node* const m0 = m.Int32Mul(p0, p1);
  m.Return(m.Int32Mul(m0, p0));
  Stream s = m.Build();
  ASSERT_EQ(2U, s.size());
  EXPECT_EQ(kX64Imul32, s[0]->arch_opcode());
  ASSERT_EQ(2U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(1)));
  ASSERT_EQ(1U, s[0]->OutputCount());
  EXPECT_EQ(s.ToVreg(m0), s.ToVreg(s[0]->OutputAt(0)));
  EXPECT_EQ(kX64Imul32, s[1]->arch_opcode());
  ASSERT_EQ(2U, s[1]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[1]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(m0), s.ToVreg(s[1]->InputAt(1)));
}


TEST_F(InstructionSelectorTest, Int32MulHigh) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32(),
                  MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  Node* const n = m.Int32MulHigh(p0, p1);
  m.Return(n);
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64ImulHigh32, s[0]->arch_opcode());
  ASSERT_EQ(2U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_TRUE(s.IsFixed(s[0]->InputAt(0), rax));
  EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
  EXPECT_TRUE(!s.IsUsedAtStart(s[0]->InputAt(1)));
  ASSERT_LE(1U, s[0]->OutputCount());
  EXPECT_EQ(s.ToVreg(n), s.ToVreg(s[0]->Output()));
  EXPECT_TRUE(s.IsFixed(s[0]->OutputAt(0), rdx));
}


TEST_F(InstructionSelectorTest, Uint32MulHigh) {
  StreamBuilder m(this, MachineType::Uint32(), MachineType::Uint32(),
                  MachineType::Uint32());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  Node* const n = m.Uint32MulHigh(p0, p1);
  m.Return(n);
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64UmulHigh32, s[0]->arch_opcode());
  ASSERT_EQ(2U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_TRUE(s.IsFixed(s[0]->InputAt(0), rax));
  EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
  EXPECT_TRUE(!s.IsUsedAtStart(s[0]->InputAt(1)));
  ASSERT_LE(1U, s[0]->OutputCount());
  EXPECT_EQ(s.ToVreg(n), s.ToVreg(s[0]->Output()));
  EXPECT_TRUE(s.IsFixed(s[0]->OutputAt(0), rdx));
}


TEST_F(InstructionSelectorTest, Int32Mul2BecomesLea) {
  StreamBuilder m(this, MachineType::Uint32(), MachineType::Uint32(),
                  MachineType::Uint32());
  Node* const p0 = m.Parameter(0);
  Node* const c1 = m.Int32Constant(2);
  Node* const n = m.Int32Mul(p0, c1);
  m.Return(n);
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_MR1, s[0]->addressing_mode());
  ASSERT_EQ(2U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(1)));
}


TEST_F(InstructionSelectorTest, Int32Mul3BecomesLea) {
  StreamBuilder m(this, MachineType::Uint32(), MachineType::Uint32(),
                  MachineType::Uint32());
  Node* const p0 = m.Parameter(0);
  Node* const c1 = m.Int32Constant(3);
  Node* const n = m.Int32Mul(p0, c1);
  m.Return(n);
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_MR2, s[0]->addressing_mode());
  ASSERT_EQ(2U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(1)));
}


TEST_F(InstructionSelectorTest, Int32Mul4BecomesLea) {
  StreamBuilder m(this, MachineType::Uint32(), MachineType::Uint32(),
                  MachineType::Uint32());
  Node* const p0 = m.Parameter(0);
  Node* const c1 = m.Int32Constant(4);
  Node* const n = m.Int32Mul(p0, c1);
  m.Return(n);
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_M4, s[0]->addressing_mode());
  ASSERT_EQ(1U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
}


TEST_F(InstructionSelectorTest, Int32Mul5BecomesLea) {
  StreamBuilder m(this, MachineType::Uint32(), MachineType::Uint32(),
                  MachineType::Uint32());
  Node* const p0 = m.Parameter(0);
  Node* const c1 = m.Int32Constant(5);
  Node* const n = m.Int32Mul(p0, c1);
  m.Return(n);
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_MR4, s[0]->addressing_mode());
  ASSERT_EQ(2U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(1)));
}


TEST_F(InstructionSelectorTest, Int32Mul8BecomesLea) {
  StreamBuilder m(this, MachineType::Uint32(), MachineType::Uint32(),
                  MachineType::Uint32());
  Node* const p0 = m.Parameter(0);
  Node* const c1 = m.Int32Constant(8);
  Node* const n = m.Int32Mul(p0, c1);
  m.Return(n);
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_M8, s[0]->addressing_mode());
  ASSERT_EQ(1U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
}


TEST_F(InstructionSelectorTest, Int32Mul9BecomesLea) {
  StreamBuilder m(this, MachineType::Uint32(), MachineType::Uint32(),
                  MachineType::Uint32());
  Node* const p0 = m.Parameter(0);
  Node* const c1 = m.Int32Constant(9);
  Node* const n = m.Int32Mul(p0, c1);
  m.Return(n);
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_MR8, s[0]->addressing_mode());
  ASSERT_EQ(2U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(1)));
}


// -----------------------------------------------------------------------------
// Word32Shl.


TEST_F(InstructionSelectorTest, Int32Shl1BecomesLea) {
  StreamBuilder m(this, MachineType::Uint32(), MachineType::Uint32(),
                  MachineType::Uint32());
  Node* const p0 = m.Parameter(0);
  Node* const c1 = m.Int32Constant(1);
  Node* const n = m.Word32Shl(p0, c1);
  m.Return(n);
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_MR1, s[0]->addressing_mode());
  ASSERT_EQ(2U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(1)));
}


TEST_F(InstructionSelectorTest, Int32Shl2BecomesLea) {
  StreamBuilder m(this, MachineType::Uint32(), MachineType::Uint32(),
                  MachineType::Uint32());
  Node* const p0 = m.Parameter(0);
  Node* const c1 = m.Int32Constant(2);
  Node* const n = m.Word32Shl(p0, c1);
  m.Return(n);
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_M4, s[0]->addressing_mode());
  ASSERT_EQ(1U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
}


TEST_F(InstructionSelectorTest, Int32Shl4BecomesLea) {
  StreamBuilder m(this, MachineType::Uint32(), MachineType::Uint32(),
                  MachineType::Uint32());
  Node* const p0 = m.Parameter(0);
  Node* const c1 = m.Int32Constant(3);
  Node* const n = m.Word32Shl(p0, c1);
  m.Return(n);
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Lea32, s[0]->arch_opcode());
  EXPECT_EQ(kMode_M8, s[0]->addressing_mode());
  ASSERT_EQ(1U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
}

// -----------------------------------------------------------------------------
// Binops with a memory operand.

TEST_F(InstructionSelectorTest, LoadCmp32) {
  {
    // Word32Equal(Load[Int8](p0, p1), Int32Constant(0)) -> cmpb [p0,p1], 0
    StreamBuilder m(this, MachineType::Int32(), MachineType::Int64(),
                    MachineType::Int64());
    Node* const p0 = m.Parameter(0);
    Node* const p1 = m.Parameter(1);
    m.Return(
        m.Word32Equal(m.Load(MachineType::Int8(), p0, p1), m.Int32Constant(0)));
    Stream s = m.Build();
    ASSERT_EQ(1U, s.size());
    EXPECT_EQ(kX64Cmp8, s[0]->arch_opcode());
    EXPECT_EQ(kMode_MR1, s[0]->addressing_mode());
    ASSERT_EQ(3U, s[0]->InputCount());
    EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
    EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
    EXPECT_TRUE(s[0]->InputAt(2)->IsImmediate());
  }
  {
    // Word32Equal(Load[Uint8](p0, p1), Int32Constant(0)) -> cmpb [p0,p1], 0
    StreamBuilder m(this, MachineType::Int32(), MachineType::Int64(),
                    MachineType::Int64());
    Node* const p0 = m.Parameter(0);
    Node* const p1 = m.Parameter(1);
    m.Return(m.Word32Equal(m.Load(MachineType::Uint8(), p0, p1),
                           m.Int32Constant(0)));
    Stream s = m.Build();
    ASSERT_EQ(1U, s.size());
    EXPECT_EQ(kX64Cmp8, s[0]->arch_opcode());
    EXPECT_EQ(kMode_MR1, s[0]->addressing_mode());
    ASSERT_EQ(3U, s[0]->InputCount());
    EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
    EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
    EXPECT_TRUE(s[0]->InputAt(2)->IsImmediate());
  }
  {
    // Word32Equal(Load[Int16](p0, p1), Int32Constant(0)) -> cmpw [p0,p1], 0
    StreamBuilder m(this, MachineType::Int32(), MachineType::Int64(),
                    MachineType::Int64());
    Node* const p0 = m.Parameter(0);
    Node* const p1 = m.Parameter(1);
    m.Return(m.Word32Equal(m.Load(MachineType::Int16(), p0, p1),
                           m.Int32Constant(0)));
    Stream s = m.Build();
    ASSERT_EQ(1U, s.size());
    EXPECT_EQ(kX64Cmp16, s[0]->arch_opcode());
    EXPECT_EQ(kMode_MR1, s[0]->addressing_mode());
    ASSERT_EQ(3U, s[0]->InputCount());
    EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
    EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
    EXPECT_TRUE(s[0]->InputAt(2)->IsImmediate());
  }
  {
    // Word32Equal(Load[Uint16](p0, p1), Int32Constant(0)) -> cmpw [p0,p1], 0
    StreamBuilder m(this, MachineType::Int32(), MachineType::Int64(),
                    MachineType::Int64());
    Node* const p0 = m.Parameter(0);
    Node* const p1 = m.Parameter(1);
    m.Return(m.Word32Equal(m.Load(MachineType::Uint16(), p0, p1),
                           m.Int32Constant(0)));
    Stream s = m.Build();
    ASSERT_EQ(1U, s.size());
    EXPECT_EQ(kX64Cmp16, s[0]->arch_opcode());
    EXPECT_EQ(kMode_MR1, s[0]->addressing_mode());
    ASSERT_EQ(3U, s[0]->InputCount());
    EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
    EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
    EXPECT_TRUE(s[0]->InputAt(2)->IsImmediate());
  }
  {
    // Word32Equal(Load[Int32](p0, p1), Int32Constant(0)) -> cmpl [p0,p1], 0
    StreamBuilder m(this, MachineType::Int32(), MachineType::Int64(),
                    MachineType::Int64());
    Node* const p0 = m.Parameter(0);
    Node* const p1 = m.Parameter(1);
    m.Return(m.Word32Equal(m.Load(MachineType::Int32(), p0, p1),
                           m.Int32Constant(0)));
    Stream s = m.Build();
    ASSERT_EQ(1U, s.size());
    EXPECT_EQ(kX64Cmp32, s[0]->arch_opcode());
    EXPECT_EQ(kMode_MR1, s[0]->addressing_mode());
    ASSERT_EQ(3U, s[0]->InputCount());
    EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
    EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
    EXPECT_TRUE(s[0]->InputAt(2)->IsImmediate());
  }
  {
    // Word32Equal(Load[Uint32](p0, p1), Int32Constant(0)) -> cmpl [p0,p1], 0
    StreamBuilder m(this, MachineType::Int32(), MachineType::Int64(),
                    MachineType::Int64());
    Node* const p0 = m.Parameter(0);
    Node* const p1 = m.Parameter(1);
    m.Return(m.Word32Equal(m.Load(MachineType::Uint32(), p0, p1),
                           m.Int32Constant(0)));
    Stream s = m.Build();
    ASSERT_EQ(1U, s.size());
    EXPECT_EQ(kX64Cmp32, s[0]->arch_opcode());
    EXPECT_EQ(kMode_MR1, s[0]->addressing_mode());
    ASSERT_EQ(3U, s[0]->InputCount());
    EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
    EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
    EXPECT_TRUE(s[0]->InputAt(2)->IsImmediate());
  }
}

TEST_F(InstructionSelectorTest, LoadAnd32) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32(),
                  MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  m.Return(
      m.Word32And(p0, m.Load(MachineType::Int32(), p1, m.Int32Constant(127))));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64And32, s[0]->arch_opcode());
  ASSERT_EQ(3U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
}

TEST_F(InstructionSelectorTest, LoadOr32) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32(),
                  MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  m.Return(
      m.Word32Or(p0, m.Load(MachineType::Int32(), p1, m.Int32Constant(127))));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Or32, s[0]->arch_opcode());
  ASSERT_EQ(3U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
}

TEST_F(InstructionSelectorTest, LoadXor32) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32(),
                  MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  m.Return(
      m.Word32Xor(p0, m.Load(MachineType::Int32(), p1, m.Int32Constant(127))));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Xor32, s[0]->arch_opcode());
  ASSERT_EQ(3U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
}

TEST_F(InstructionSelectorTest, LoadAdd32) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32(),
                  MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  m.Return(
      m.Int32Add(p0, m.Load(MachineType::Int32(), p1, m.Int32Constant(127))));
  Stream s = m.Build();
  // Use lea instead of add, so memory operand is invalid.
  ASSERT_EQ(2U, s.size());
  EXPECT_EQ(kX64Movl, s[0]->arch_opcode());
  EXPECT_EQ(kX64Lea32, s[1]->arch_opcode());
}

TEST_F(InstructionSelectorTest, LoadSub32) {
  StreamBuilder m(this, MachineType::Int32(), MachineType::Int32(),
                  MachineType::Int32());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  m.Return(
      m.Int32Sub(p0, m.Load(MachineType::Int32(), p1, m.Int32Constant(127))));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Sub32, s[0]->arch_opcode());
  ASSERT_EQ(3U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
}

TEST_F(InstructionSelectorTest, LoadAnd64) {
  StreamBuilder m(this, MachineType::Int64(), MachineType::Int64(),
                  MachineType::Int64());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  m.Return(
      m.Word64And(p0, m.Load(MachineType::Int64(), p1, m.Int32Constant(127))));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64And, s[0]->arch_opcode());
  ASSERT_EQ(3U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
}

TEST_F(InstructionSelectorTest, LoadOr64) {
  StreamBuilder m(this, MachineType::Int64(), MachineType::Int64(),
                  MachineType::Int64());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  m.Return(
      m.Word64Or(p0, m.Load(MachineType::Int64(), p1, m.Int32Constant(127))));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Or, s[0]->arch_opcode());
  ASSERT_EQ(3U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
}

TEST_F(InstructionSelectorTest, LoadXor64) {
  StreamBuilder m(this, MachineType::Int64(), MachineType::Int64(),
                  MachineType::Int64());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  m.Return(
      m.Word64Xor(p0, m.Load(MachineType::Int64(), p1, m.Int32Constant(127))));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Xor, s[0]->arch_opcode());
  ASSERT_EQ(3U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
}

TEST_F(InstructionSelectorTest, LoadAdd64) {
  StreamBuilder m(this, MachineType::Int64(), MachineType::Int64(),
                  MachineType::Int64());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  m.Return(
      m.Int64Add(p0, m.Load(MachineType::Int64(), p1, m.Int32Constant(127))));
  Stream s = m.Build();
  // Use lea instead of add, so memory operand is invalid.
  ASSERT_EQ(2U, s.size());
  EXPECT_EQ(kX64Movq, s[0]->arch_opcode());
  EXPECT_EQ(kX64Lea, s[1]->arch_opcode());
}

TEST_F(InstructionSelectorTest, LoadSub64) {
  StreamBuilder m(this, MachineType::Int64(), MachineType::Int64(),
                  MachineType::Int64());
  Node* const p0 = m.Parameter(0);
  Node* const p1 = m.Parameter(1);
  m.Return(
      m.Int64Sub(p0, m.Load(MachineType::Int64(), p1, m.Int32Constant(127))));
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Sub, s[0]->arch_opcode());
  ASSERT_EQ(3U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
}

// -----------------------------------------------------------------------------
// Floating point operations.

TEST_F(InstructionSelectorTest, Float32Abs) {
  {
    StreamBuilder m(this, MachineType::Float32(), MachineType::Float32());
    Node* const p0 = m.Parameter(0);
    Node* const n = m.Float32Abs(p0);
    m.Return(n);
    Stream s = m.Build();
    ASSERT_EQ(1U, s.size());
    EXPECT_EQ(kSSEFloat32Abs, s[0]->arch_opcode());
    ASSERT_EQ(1U, s[0]->InputCount());
    EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
    ASSERT_EQ(1U, s[0]->OutputCount());
    EXPECT_TRUE(s.IsSameAsFirst(s[0]->Output()));
    EXPECT_EQ(s.ToVreg(n), s.ToVreg(s[0]->Output()));
    EXPECT_EQ(kFlags_none, s[0]->flags_mode());
  }
  {
    StreamBuilder m(this, MachineType::Float32(), MachineType::Float32());
    Node* const p0 = m.Parameter(0);
    Node* const n = m.Float32Abs(p0);
    m.Return(n);
    Stream s = m.Build(AVX);
    ASSERT_EQ(1U, s.size());
    EXPECT_EQ(kAVXFloat32Abs, s[0]->arch_opcode());
    ASSERT_EQ(1U, s[0]->InputCount());
    EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
    ASSERT_EQ(1U, s[0]->OutputCount());
    EXPECT_EQ(s.ToVreg(n), s.ToVreg(s[0]->Output()));
    EXPECT_EQ(kFlags_none, s[0]->flags_mode());
  }
}


TEST_F(InstructionSelectorTest, Float64Abs) {
  {
    StreamBuilder m(this, MachineType::Float64(), MachineType::Float64());
    Node* const p0 = m.Parameter(0);
    Node* const n = m.Float64Abs(p0);
    m.Return(n);
    Stream s = m.Build();
    ASSERT_EQ(1U, s.size());
    EXPECT_EQ(kSSEFloat64Abs, s[0]->arch_opcode());
    ASSERT_EQ(1U, s[0]->InputCount());
    EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
    ASSERT_EQ(1U, s[0]->OutputCount());
    EXPECT_TRUE(s.IsSameAsFirst(s[0]->Output()));
    EXPECT_EQ(s.ToVreg(n), s.ToVreg(s[0]->Output()));
    EXPECT_EQ(kFlags_none, s[0]->flags_mode());
  }
  {
    StreamBuilder m(this, MachineType::Float64(), MachineType::Float64());
    Node* const p0 = m.Parameter(0);
    Node* const n = m.Float64Abs(p0);
    m.Return(n);
    Stream s = m.Build(AVX);
    ASSERT_EQ(1U, s.size());
    EXPECT_EQ(kAVXFloat64Abs, s[0]->arch_opcode());
    ASSERT_EQ(1U, s[0]->InputCount());
    EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
    ASSERT_EQ(1U, s[0]->OutputCount());
    EXPECT_EQ(s.ToVreg(n), s.ToVreg(s[0]->Output()));
    EXPECT_EQ(kFlags_none, s[0]->flags_mode());
  }
}


TEST_F(InstructionSelectorTest, Float64BinopArithmetic) {
  {
    StreamBuilder m(this, MachineType::Float64(), MachineType::Float64(),
                    MachineType::Float64());
    Node* add = m.Float64Add(m.Parameter(0), m.Parameter(1));
    Node* mul = m.Float64Mul(add, m.Parameter(1));
    Node* sub = m.Float64Sub(mul, add);
    Node* ret = m.Float64Div(mul, sub);
    m.Return(ret);
    Stream s = m.Build(AVX);
    ASSERT_EQ(4U, s.size());
    EXPECT_EQ(kAVXFloat64Add, s[0]->arch_opcode());
    EXPECT_EQ(kAVXFloat64Mul, s[1]->arch_opcode());
    EXPECT_EQ(kAVXFloat64Sub, s[2]->arch_opcode());
    EXPECT_EQ(kAVXFloat64Div, s[3]->arch_opcode());
  }
  {
    StreamBuilder m(this, MachineType::Float64(), MachineType::Float64(),
                    MachineType::Float64());
    Node* add = m.Float64Add(m.Parameter(0), m.Parameter(1));
    Node* mul = m.Float64Mul(add, m.Parameter(1));
    Node* sub = m.Float64Sub(mul, add);
    Node* ret = m.Float64Div(mul, sub);
    m.Return(ret);
    Stream s = m.Build();
    ASSERT_EQ(4U, s.size());
    EXPECT_EQ(kSSEFloat64Add, s[0]->arch_opcode());
    EXPECT_EQ(kSSEFloat64Mul, s[1]->arch_opcode());
    EXPECT_EQ(kSSEFloat64Sub, s[2]->arch_opcode());
    EXPECT_EQ(kSSEFloat64Div, s[3]->arch_opcode());
  }
}

TEST_F(InstructionSelectorTest, Float32BinopArithmeticWithLoad) {
  {
    StreamBuilder m(this, MachineType::Float32(), MachineType::Float32(),
                    MachineType::Int64(), MachineType::Int64());
    Node* const p0 = m.Parameter(0);
    Node* const p1 = m.Parameter(1);
    Node* const p2 = m.Parameter(2);
    Node* add = m.Float32Add(
        p0, m.Load(MachineType::Float32(), p1, m.Int32Constant(127)));
    Node* sub = m.Float32Sub(
        add, m.Load(MachineType::Float32(), p1, m.Int32Constant(127)));
    Node* ret = m.Float32Mul(
        m.Load(MachineType::Float32(), p2, m.Int32Constant(127)), sub);
    m.Return(ret);
    Stream s = m.Build(AVX);
    ASSERT_EQ(3U, s.size());
    EXPECT_EQ(kAVXFloat32Add, s[0]->arch_opcode());
    ASSERT_EQ(3U, s[0]->InputCount());
    EXPECT_EQ(kAVXFloat32Sub, s[1]->arch_opcode());
    ASSERT_EQ(3U, s[1]->InputCount());
    EXPECT_EQ(kAVXFloat32Mul, s[2]->arch_opcode());
    ASSERT_EQ(3U, s[2]->InputCount());
    EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
    EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
    EXPECT_EQ(s.ToVreg(p2), s.ToVreg(s[2]->InputAt(1)));
  }
  {
    StreamBuilder m(this, MachineType::Float32(), MachineType::Float32(),
                    MachineType::Int64(), MachineType::Int64());
    Node* const p0 = m.Parameter(0);
    Node* const p1 = m.Parameter(1);
    Node* const p2 = m.Parameter(2);
    Node* add = m.Float32Add(
        p0, m.Load(MachineType::Float32(), p1, m.Int32Constant(127)));
    Node* sub = m.Float32Sub(
        add, m.Load(MachineType::Float32(), p1, m.Int32Constant(127)));
    Node* ret = m.Float32Mul(
        m.Load(MachineType::Float32(), p2, m.Int32Constant(127)), sub);
    m.Return(ret);
    Stream s = m.Build();
    ASSERT_EQ(3U, s.size());
    EXPECT_EQ(kSSEFloat32Add, s[0]->arch_opcode());
    ASSERT_EQ(3U, s[0]->InputCount());
    EXPECT_EQ(kSSEFloat32Sub, s[1]->arch_opcode());
    ASSERT_EQ(3U, s[1]->InputCount());
    EXPECT_EQ(kSSEFloat32Mul, s[2]->arch_opcode());
    ASSERT_EQ(3U, s[2]->InputCount());
    EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
    EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
    EXPECT_EQ(s.ToVreg(p2), s.ToVreg(s[2]->InputAt(1)));
  }
}

TEST_F(InstructionSelectorTest, Float64BinopArithmeticWithLoad) {
  {
    StreamBuilder m(this, MachineType::Float64(), MachineType::Float64(),
                    MachineType::Int64(), MachineType::Int64());
    Node* const p0 = m.Parameter(0);
    Node* const p1 = m.Parameter(1);
    Node* const p2 = m.Parameter(2);
    Node* add = m.Float64Add(
        p0, m.Load(MachineType::Float64(), p1, m.Int32Constant(127)));
    Node* sub = m.Float64Sub(
        add, m.Load(MachineType::Float64(), p1, m.Int32Constant(127)));
    Node* ret = m.Float64Mul(
        m.Load(MachineType::Float64(), p2, m.Int32Constant(127)), sub);
    m.Return(ret);
    Stream s = m.Build(AVX);
    ASSERT_EQ(3U, s.size());
    EXPECT_EQ(kAVXFloat64Add, s[0]->arch_opcode());
    ASSERT_EQ(3U, s[0]->InputCount());
    EXPECT_EQ(kAVXFloat64Sub, s[1]->arch_opcode());
    ASSERT_EQ(3U, s[1]->InputCount());
    EXPECT_EQ(kAVXFloat64Mul, s[2]->arch_opcode());
    ASSERT_EQ(3U, s[2]->InputCount());
    EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
    EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
    EXPECT_EQ(s.ToVreg(p2), s.ToVreg(s[2]->InputAt(1)));
  }
  {
    StreamBuilder m(this, MachineType::Float64(), MachineType::Float64(),
                    MachineType::Int64(), MachineType::Int64());
    Node* const p0 = m.Parameter(0);
    Node* const p1 = m.Parameter(1);
    Node* const p2 = m.Parameter(2);
    Node* add = m.Float64Add(
        p0, m.Load(MachineType::Float64(), p1, m.Int32Constant(127)));
    Node* sub = m.Float64Sub(
        add, m.Load(MachineType::Float64(), p1, m.Int32Constant(127)));
    Node* ret = m.Float64Mul(
        m.Load(MachineType::Float64(), p2, m.Int32Constant(127)), sub);
    m.Return(ret);
    Stream s = m.Build();
    ASSERT_EQ(3U, s.size());
    EXPECT_EQ(kSSEFloat64Add, s[0]->arch_opcode());
    ASSERT_EQ(3U, s[0]->InputCount());
    EXPECT_EQ(kSSEFloat64Sub, s[1]->arch_opcode());
    ASSERT_EQ(3U, s[1]->InputCount());
    EXPECT_EQ(kSSEFloat64Mul, s[2]->arch_opcode());
    ASSERT_EQ(3U, s[2]->InputCount());
    EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
    EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
    EXPECT_EQ(s.ToVreg(p2), s.ToVreg(s[2]->InputAt(1)));
  }
}

// -----------------------------------------------------------------------------
// Miscellaneous.


TEST_F(InstructionSelectorTest, Word64ShlWithChangeInt32ToInt64) {
  TRACED_FORRANGE(int64_t, x, 32, 63) {
    StreamBuilder m(this, MachineType::Int64(), MachineType::Int32());
    Node* const p0 = m.Parameter(0);
    Node* const n = m.Word64Shl(m.ChangeInt32ToInt64(p0), m.Int64Constant(x));
    m.Return(n);
    Stream s = m.Build();
    ASSERT_EQ(1U, s.size());
    EXPECT_EQ(kX64Shl, s[0]->arch_opcode());
    ASSERT_EQ(2U, s[0]->InputCount());
    EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
    EXPECT_EQ(x, s.ToInt32(s[0]->InputAt(1)));
    ASSERT_EQ(1U, s[0]->OutputCount());
    EXPECT_TRUE(s.IsSameAsFirst(s[0]->Output()));
    EXPECT_EQ(s.ToVreg(n), s.ToVreg(s[0]->Output()));
  }
}


TEST_F(InstructionSelectorTest, Word64ShlWithChangeUint32ToUint64) {
  TRACED_FORRANGE(int64_t, x, 32, 63) {
    StreamBuilder m(this, MachineType::Int64(), MachineType::Uint32());
    Node* const p0 = m.Parameter(0);
    Node* const n = m.Word64Shl(m.ChangeUint32ToUint64(p0), m.Int64Constant(x));
    m.Return(n);
    Stream s = m.Build();
    ASSERT_EQ(1U, s.size());
    EXPECT_EQ(kX64Shl, s[0]->arch_opcode());
    ASSERT_EQ(2U, s[0]->InputCount());
    EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
    EXPECT_EQ(x, s.ToInt32(s[0]->InputAt(1)));
    ASSERT_EQ(1U, s[0]->OutputCount());
    EXPECT_TRUE(s.IsSameAsFirst(s[0]->Output()));
    EXPECT_EQ(s.ToVreg(n), s.ToVreg(s[0]->Output()));
  }
}

TEST_F(InstructionSelectorTest, Word32AndWith0xFF) {
  {
    StreamBuilder m(this, MachineType::Int32(), MachineType::Int32());
    Node* const p0 = m.Parameter(0);
    Node* const n = m.Word32And(p0, m.Int32Constant(0xFF));
    m.Return(n);
    Stream s = m.Build();
    ASSERT_EQ(1U, s.size());
    EXPECT_EQ(kX64Movzxbl, s[0]->arch_opcode());
    ASSERT_EQ(1U, s[0]->InputCount());
    EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
    ASSERT_EQ(1U, s[0]->OutputCount());
    EXPECT_EQ(s.ToVreg(n), s.ToVreg(s[0]->Output()));
  }
  {
    StreamBuilder m(this, MachineType::Int32(), MachineType::Int32());
    Node* const p0 = m.Parameter(0);
    Node* const n = m.Word32And(m.Int32Constant(0xFF), p0);
    m.Return(n);
    Stream s = m.Build();
    ASSERT_EQ(1U, s.size());
    EXPECT_EQ(kX64Movzxbl, s[0]->arch_opcode());
    ASSERT_EQ(1U, s[0]->InputCount());
    EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
    ASSERT_EQ(1U, s[0]->OutputCount());
    EXPECT_EQ(s.ToVreg(n), s.ToVreg(s[0]->Output()));
  }
}

TEST_F(InstructionSelectorTest, Word32AndWith0xFFFF) {
  {
    StreamBuilder m(this, MachineType::Int32(), MachineType::Int32());
    Node* const p0 = m.Parameter(0);
    Node* const n = m.Word32And(p0, m.Int32Constant(0xFFFF));
    m.Return(n);
    Stream s = m.Build();
    ASSERT_EQ(1U, s.size());
    EXPECT_EQ(kX64Movzxwl, s[0]->arch_opcode());
    ASSERT_EQ(1U, s[0]->InputCount());
    EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
    ASSERT_EQ(1U, s[0]->OutputCount());
    EXPECT_EQ(s.ToVreg(n), s.ToVreg(s[0]->Output()));
  }
  {
    StreamBuilder m(this, MachineType::Int32(), MachineType::Int32());
    Node* const p0 = m.Parameter(0);
    Node* const n = m.Word32And(m.Int32Constant(0xFFFF), p0);
    m.Return(n);
    Stream s = m.Build();
    ASSERT_EQ(1U, s.size());
    EXPECT_EQ(kX64Movzxwl, s[0]->arch_opcode());
    ASSERT_EQ(1U, s[0]->InputCount());
    EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
    ASSERT_EQ(1U, s[0]->OutputCount());
    EXPECT_EQ(s.ToVreg(n), s.ToVreg(s[0]->Output()));
  }
}


TEST_F(InstructionSelectorTest, Word32Clz) {
  StreamBuilder m(this, MachineType::Uint32(), MachineType::Uint32());
  Node* const p0 = m.Parameter(0);
  Node* const n = m.Word32Clz(p0);
  m.Return(n);
  Stream s = m.Build();
  ASSERT_EQ(1U, s.size());
  EXPECT_EQ(kX64Lzcnt32, s[0]->arch_opcode());
  ASSERT_EQ(1U, s[0]->InputCount());
  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
  ASSERT_EQ(1U, s[0]->OutputCount());
  EXPECT_EQ(s.ToVreg(n), s.ToVreg(s[0]->Output()));
}

TEST_F(InstructionSelectorTest, LoadAndWord64ShiftRight32) {
  {
    StreamBuilder m(this, MachineType::Uint64(), MachineType::Uint32());
    Node* const p0 = m.Parameter(0);
    Node* const load = m.Load(MachineType::Uint64(), p0);
    Node* const shift = m.Word64Shr(load, m.Int32Constant(32));
    m.Return(shift);
    Stream s = m.Build();
    ASSERT_EQ(1U, s.size());
    EXPECT_EQ(kX64Movl, s[0]->arch_opcode());
    ASSERT_EQ(2U, s[0]->InputCount());
    EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
    EXPECT_EQ(4, s.ToInt32(s[0]->InputAt(1)));
    ASSERT_EQ(1U, s[0]->OutputCount());
    EXPECT_EQ(s.ToVreg(shift), s.ToVreg(s[0]->Output()));
  }
  {
    StreamBuilder m(this, MachineType::Int64(), MachineType::Int32());
    Node* const p0 = m.Parameter(0);
    Node* const load = m.Load(MachineType::Int64(), p0);
    Node* const shift = m.Word64Sar(load, m.Int32Constant(32));
    m.Return(shift);
    Stream s = m.Build();
    ASSERT_EQ(1U, s.size());
    EXPECT_EQ(kX64Movsxlq, s[0]->arch_opcode());
    ASSERT_EQ(2U, s[0]->InputCount());
    EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
    EXPECT_EQ(4, s.ToInt32(s[0]->InputAt(1)));
    ASSERT_EQ(1U, s[0]->OutputCount());
    EXPECT_EQ(s.ToVreg(shift), s.ToVreg(s[0]->Output()));
  }
  {
    StreamBuilder m(this, MachineType::Int64(), MachineType::Int32());
    Node* const p0 = m.Parameter(0);
    Node* const load = m.Load(MachineType::Int64(), p0);
    Node* const shift = m.Word64Sar(load, m.Int32Constant(32));
    Node* const truncate = m.TruncateInt64ToInt32(shift);
    m.Return(truncate);
    Stream s = m.Build();
    ASSERT_EQ(1U, s.size());
    EXPECT_EQ(kX64Movl, s[0]->arch_opcode());
    ASSERT_EQ(2U, s[0]->InputCount());
    EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
    EXPECT_EQ(4, s.ToInt32(s[0]->InputAt(1)));
    ASSERT_EQ(1U, s[0]->OutputCount());
    EXPECT_EQ(s.ToVreg(shift), s.ToVreg(s[0]->Output()));
  }
}

// -----------------------------------------------------------------------------
// SIMD.

TEST_F(InstructionSelectorTest, SIMDSplatZero) {
  // Test optimization for splat of contant 0.
  // {i8x16,i16x8,i32x4,i64x2}.splat(const(0)) -> v128.zero().
  // Optimizations for f32x4.splat and f64x2.splat not implemented since it
  // doesn't improve the codegen as much (same number of instructions).
  {
    StreamBuilder m(this, MachineType::Simd128());
    Node* const splat = m.I64x2Splat(m.Int64Constant(0));
    m.Return(splat);
    Stream s = m.Build();
    ASSERT_EQ(1U, s.size());
    EXPECT_EQ(kX64S128Zero, s[0]->arch_opcode());
    ASSERT_EQ(0U, s[0]->InputCount());
    EXPECT_EQ(1U, s[0]->OutputCount());
  }
  {
    StreamBuilder m(this, MachineType::Simd128());
    Node* const splat = m.I32x4Splat(m.Int32Constant(0));
    m.Return(splat);
    Stream s = m.Build();
    ASSERT_EQ(1U, s.size());
    EXPECT_EQ(kX64S128Zero, s[0]->arch_opcode());
    ASSERT_EQ(0U, s[0]->InputCount());
    EXPECT_EQ(1U, s[0]->OutputCount());
  }
  {
    StreamBuilder m(this, MachineType::Simd128());
    Node* const splat = m.I16x8Splat(m.Int32Constant(0));
    m.Return(splat);
    Stream s = m.Build();
    ASSERT_EQ(1U, s.size());
    EXPECT_EQ(kX64S128Zero, s[0]->arch_opcode());
    ASSERT_EQ(0U, s[0]->InputCount());
    EXPECT_EQ(1U, s[0]->OutputCount());
  }
  {
    StreamBuilder m(this, MachineType::Simd128());
    Node* const splat = m.I8x16Splat(m.Int32Constant(0));
    m.Return(splat);
    Stream s = m.Build();
    ASSERT_EQ(1U, s.size());
    EXPECT_EQ(kX64S128Zero, s[0]->arch_opcode());
    ASSERT_EQ(0U, s[0]->InputCount());
    EXPECT_EQ(1U, s[0]->OutputCount());
  }
}

#if V8_ENABLE_WEBASSEMBLY
struct ArchShuffle {
  uint8_t shuffle[kSimd128Size];
  ArchOpcode arch_opcode;
  size_t input_count;
  bool inputs_are_swapped = false;
};

static constexpr ArchShuffle kArchShuffles[] = {
    // These are architecture specific shuffles defined in
    // instruction-selecor-x64.cc arch_shuffles.
    {
        {0, 1, 2, 3, 4, 5, 6, 7, 16, 17, 18, 19, 20, 21, 22, 23},
        kX64S64x2UnpackLow,
        2,
    },
    {
        {8, 9, 10, 11, 12, 13, 14, 15, 24, 25, 26, 27, 28, 29, 30, 31},
        kX64S64x2UnpackHigh,
        2,
    },
    {
        {0, 1, 2, 3, 16, 17, 18, 19, 4, 5, 6, 7, 20, 21, 22, 23},
        kX64S32x4UnpackLow,
        2,
    },
    {
        {8, 9, 10, 11, 24, 25, 26, 27, 12, 13, 14, 15, 28, 29, 30, 31},
        kX64S32x4UnpackHigh,
        2,
    },
    {
        {0, 1, 16, 17, 2, 3, 18, 19, 4, 5, 20, 21, 6, 7, 22, 23},
        kX64S16x8UnpackLow,
        2,
    },
    {
        {8, 9, 24, 25, 10, 11, 26, 27, 12, 13, 28, 29, 14, 15, 30, 31},
        kX64S16x8UnpackHigh,
        2,
    },
    {
        {0, 16, 1, 17, 2, 18, 3, 19, 4, 20, 5, 21, 6, 22, 7, 23},
        kX64S8x16UnpackLow,
        2,
    },
    {
        {8, 24, 9, 25, 10, 26, 11, 27, 12, 28, 13, 29, 14, 30, 15, 31},
        kX64S8x16UnpackHigh,
        2,
    },
    {
        {0, 1, 4, 5, 8, 9, 12, 13, 16, 17, 20, 21, 24, 25, 28, 29},
        kX64S16x8UnzipLow,
        2,
    },
    {
        {2, 3, 6, 7, 10, 11, 14, 15, 18, 19, 22, 23, 26, 27, 30, 31},
        kX64S16x8UnzipHigh,
        2,
    },
    {
        {0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30},
        kX64S8x16UnzipLow,
        2,
    },
    {
        {1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31},
        kX64S8x16UnzipHigh,
        2,
    },
    {
        {0, 16, 2, 18, 4, 20, 6, 22, 8, 24, 10, 26, 12, 28, 14, 30},
        kX64S8x16TransposeLow,
        2,
    },
    {
        {1, 17, 3, 19, 5, 21, 7, 23, 9, 25, 11, 27, 13, 29, 15, 31},
        kX64S8x16TransposeHigh,
        2,
    },
    {
        {7, 6, 5, 4, 3, 2, 1, 0, 15, 14, 13, 12, 11, 10, 9, 8},
        kX64S8x8Reverse,
        1,
    },
    {
        {3, 2, 1, 0, 7, 6, 5, 4, 11, 10, 9, 8, 15, 14, 13, 12},
        kX64S8x4Reverse,
        1,
    },
    {
        {1, 0, 3, 2, 5, 4, 7, 6, 9, 8, 11, 10, 13, 12, 15, 14},
        kX64S8x2Reverse,
        1,
    },
    // These are matched by TryMatchConcat && TryMatch32x4Rotate.
    {
        {4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 0, 1, 2, 3},
        kX64S32x4Rotate,
        2,
    },
    {
        {8, 9, 10, 11, 12, 13, 14, 15, 0, 1, 2, 3, 4, 5, 6, 7},
        kX64S32x4Rotate,
        2,
    },
    {
        {12, 13, 14, 15, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11},
        kX64S32x4Rotate,
        2,
    },
    // These are matched by TryMatchConcat && !TryMatch32x4Rotate.
    {
        {3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 0, 1, 2},
        kX64S8x16Alignr,
        3,
        true,
    },
    {
        {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 0, 1},
        kX64S8x16Alignr,
        3,
        true,
    },
    {
        {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17},
        kX64S8x16Alignr,
        3,
        true,
    },
    // These are matched by TryMatch32x4Shuffle && is_swizzle.
    {
        {0, 1, 2, 3, 8, 9, 10, 11, 4, 5, 6, 7, 12, 13, 14, 15},
        kX64S32x4Swizzle,
        2,
    },
    {
        {0, 1, 2, 3, 4, 5, 6, 7, 12, 13, 14, 15, 8, 9, 10, 11},
        kX64S32x4Swizzle,
        2,
    },
    // These are matched by TryMatch32x4Shuffle && !is_swizzle && TryMatchBlend.
    {
        {0, 1, 2, 3, 20, 21, 22, 23, 8, 9, 10, 11, 28, 29, 30, 31},
        kX64S16x8Blend,
        3,
    },
    {
        {16, 17, 18, 19, 4, 5, 6, 7, 24, 25, 26, 27, 12, 13, 14, 15},
        kX64S16x8Blend,
        3,
    },
    // These are matched by TryMatch32x4Shuffle && !is_swizzle &&
    // TryMatchShufps.
    {
        {0, 1, 2, 3, 8, 9, 10, 11, 28, 29, 30, 31, 28, 29, 30, 31},
        kX64Shufps,
        3,
    },
    {
        {8, 9, 10, 11, 0, 1, 2, 3, 28, 29, 30, 31, 28, 29, 30, 31},
        kX64Shufps,
        3,
    },
    // These are matched by TryMatch32x4Shuffle && !is_swizzle.
    {
        {28, 29, 30, 31, 0, 1, 2, 3, 28, 29, 30, 31, 28, 29, 30, 31},
        kX64S32x4Shuffle,
        4,
    },
    // These are matched by TryMatch16x8Shuffle && TryMatchBlend.
    {
        {16, 17, 2, 3, 4, 5, 6, 7, 24, 25, 26, 27, 12, 13, 14, 15},
        kX64S16x8Blend,
        3,
    },
    // These are matched by TryMatch16x8Shuffle && TryMatchSplat<8>.
    {
        {2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3},
        kX64S16x8Dup,
        2,
    },
    // These are matched by TryMatch16x8Shuffle && TryMatch16x8HalfShuffle.
    {
        {6, 7, 4, 5, 2, 3, 0, 1, 14, 15, 12, 13, 10, 11, 8, 9},
        kX64S16x8HalfShuffle1,
        3,
    },
    {
        {6, 7, 4, 5, 2, 3, 0, 1, 30, 31, 28, 29, 26, 27, 24, 25},
        kX64S16x8HalfShuffle2,
        5,
    },
    // These are matched by TryMatchSplat<16>.
    {
        {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1},
        kX64S8x16Dup,
        2,
    },
    // Generic shuffle that only uses 1 input.
    {
        {1, 15, 2, 14, 3, 13, 4, 12, 5, 11, 6, 10, 7, 9, 8},
        kX64I8x16Shuffle,
        5,
    },
    // Generic shuffle that uses both input.
    {
        {1, 31, 2, 14, 3, 13, 4, 12, 5, 11, 6, 10, 7, 9, 8},
        kX64I8x16Shuffle,
        6,
    },
};

using InstructionSelectorSIMDArchShuffleTest =
    InstructionSelectorTestWithParam<ArchShuffle>;

TEST_P(InstructionSelectorSIMDArchShuffleTest, SIMDArchShuffle) {
  MachineType type = MachineType::Simd128();
  {
    // Tests various shuffle optimizations
    StreamBuilder m(this, type, type, type);
    auto param = GetParam();
    auto shuffle = param.shuffle;

    // The shuffle constants defined in the test cases are not canonicalized.
    bool needs_swap;
    bool inputs_equal = false;
    bool is_swizzle;
    wasm::SimdShuffle::CanonicalizeShuffle(inputs_equal, shuffle, &needs_swap,
                                           &is_swizzle);

    const Operator* op = m.machine()->I8x16Shuffle(shuffle, is_swizzle);
    Node* const p0 = m.Parameter(0);
    Node* const p1 = m.Parameter(1);
    Node* n = m.AddNode(op, p0, p1);
    m.Return(n);
    Stream s = m.Build();
    ASSERT_EQ(1U, s.size());
    EXPECT_EQ(param.arch_opcode, s[0]->arch_opcode());
    ASSERT_EQ(param.input_count, s[0]->InputCount());
    EXPECT_EQ(1U, s[0]->OutputCount());
    if (param.inputs_are_swapped) {
      ASSERT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(1)));
      if (!is_swizzle) {
        ASSERT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(0)));
      }
    } else {
      ASSERT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
      if (!is_swizzle) {
        ASSERT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
      }
    }
  }
}

INSTANTIATE_TEST_SUITE_P(InstructionSelectorTest,
                         InstructionSelectorSIMDArchShuffleTest,
                         ::testing::ValuesIn(kArchShuffles));
#endif  // V8_ENABLE_WEBASSEMBLY

struct SwizzleConstants {
  uint8_t shuffle[kSimd128Size];
  bool omit_add;
};

static constexpr SwizzleConstants kSwizzleConstants[] = {
    {
        // all lanes < kSimd128Size
        {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1},
        true,
    },
    {
        // lanes that are >= kSimd128Size have top bit set
        {12, 13, 14, 15, 0x90, 0x91, 0x92, 0x93, 0xA0, 0xA1, 0xA2, 0xA3, 0xFC,
         0xFD, 0xFE, 0xFF},
        true,
    },
    {
        {12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27},
        false,
    },
};

using InstructionSelectorSIMDSwizzleConstantTest =
    InstructionSelectorTestWithParam<SwizzleConstants>;

TEST_P(InstructionSelectorSIMDSwizzleConstantTest, SimdSwizzleConstant) {
  // Test optimization of swizzle with constant indices.
  auto param = GetParam();
  StreamBuilder m(this, MachineType::Simd128(), MachineType::Simd128());
  Node* const c = m.S128Const(param.shuffle);
  Node* swizzle = m.AddNode(m.machine()->I8x16Swizzle(), m.Parameter(0), c);
  m.Return(swizzle);
  Stream s = m.Build();
  ASSERT_EQ(2U, s.size());
  ASSERT_EQ(kX64I8x16Swizzle, s[1]->arch_opcode());
  ASSERT_EQ(param.omit_add, s[1]->misc());
  ASSERT_EQ(1U, s[0]->OutputCount());
}

INSTANTIATE_TEST_SUITE_P(InstructionSelectorTest,
                         InstructionSelectorSIMDSwizzleConstantTest,
                         ::testing::ValuesIn(kSwizzleConstants));

}  // namespace compiler
}  // namespace internal
}  // namespace v8