[turbofan] Optimize division/modulus by constant.

test/unittests/compiler/ia32/instruction-selector-ia32-unittest.cc

Index: test/unittests/compiler/ia32/instruction-selector-ia32-unittest.cc
diff --git a/test/unittests/compiler/ia32/instruction-selector-ia32-unittest.cc b/test/unittests/compiler/ia32/instruction-selector-ia32-unittest.cc
index e892ad3735957905b893c26e6c0f0dcd3959337d..2ce7bca708d56dc8ec4539d1c2e9d953b4efdacc 100644
--- a/test/unittests/compiler/ia32/instruction-selector-ia32-unittest.cc
+++ b/test/unittests/compiler/ia32/instruction-selector-ia32-unittest.cc
@@ -103,6 +103,7 @@ TEST_F(InstructionSelectorTest, TruncateFloat64ToFloat32WithParameter) {
 // -----------------------------------------------------------------------------
 // Better left operand for commutative binops
 
+
 TEST_F(InstructionSelectorTest, BetterLeftOperandTestAddBinop) {
   StreamBuilder m(this, kMachInt32, kMachInt32, kMachInt32);
   Node* param1 = m.Parameter(0);
@@ -136,6 +137,7 @@ TEST_F(InstructionSelectorTest, BetterLeftOperandTestMulBinop) {
 // -----------------------------------------------------------------------------
 // Conversions.
 
+
 TEST_F(InstructionSelectorTest, ChangeUint32ToFloat64WithParameter) {
   StreamBuilder m(this, kMachFloat64, kMachUint32);
   m.Return(m.ChangeUint32ToFloat64(m.Parameter(0)));
@@ -148,6 +150,7 @@ TEST_F(InstructionSelectorTest, ChangeUint32ToFloat64WithParameter) {
 // -----------------------------------------------------------------------------
 // Loads and stores
 
+
 namespace {
 
 struct MemoryAccess {
@@ -295,6 +298,7 @@ INSTANTIATE_TEST_CASE_P(InstructionSelectorTest,
 // -----------------------------------------------------------------------------
 // AddressingMode for loads and stores.
 
+
 class AddressingModeUnitTest : public InstructionSelectorTest {
  public:
   AddressingModeUnitTest() : m(NULL) { Reset(); }
@@ -438,6 +442,7 @@ TEST_F(AddressingModeUnitTest, AddressingMode_MI) {
 // -----------------------------------------------------------------------------
 // Multiplication.
 
+
 namespace {
 
 struct MultParam {
@@ -576,6 +581,23 @@ TEST_P(InstructionSelectorMultTest, MultAdd32) {
 INSTANTIATE_TEST_CASE_P(InstructionSelectorTest, InstructionSelectorMultTest,
                         ::testing::ValuesIn(kMultParams));
 
+
+TEST_F(InstructionSelectorTest, Int32MulHigh) {
+  StreamBuilder m(this, kMachInt32, kMachInt32, kMachInt32);
+  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(kIA32ImulHigh, s[0]->arch_opcode());
+  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)));
+  ASSERT_EQ(1U, s[0]->OutputCount());
+  EXPECT_EQ(s.ToVreg(n), s.ToVreg(s[0]->Output()));
+}
+
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8