Revert of binary-operator-reducer: reduce mul+div(shift)

test/unittests/compiler/binary-operator-reducer-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 "src/compiler/binary-operator-reducer.h"
-#include "src/compiler/common-operator.h"
-#include "src/compiler/machine-operator.h"
-#include "src/compiler/machine-type.h"
-#include "src/compiler/node-properties.h"
-#include "src/compiler/operator.h"
-#include "src/compiler/simplified-operator.h"
-#include "src/types-inl.h"
-#include "test/unittests/compiler/graph-reducer-unittest.h"
-#include "test/unittests/compiler/graph-unittest.h"
-#include "test/unittests/compiler/node-test-utils.h"
-
-using testing::StrictMock;
-
-namespace v8 {
-namespace internal {
-namespace compiler {
-
-class BinaryOperatorReducerTest : public TypedGraphTest {
- public:
-  explicit BinaryOperatorReducerTest(int num_parameters = 1)
-      : TypedGraphTest(num_parameters), machine_(zone()), simplified_(zone()) {}
-  ~BinaryOperatorReducerTest() override {}
-
- protected:
-  Reduction Reduce(AdvancedReducer::Editor* editor, Node* node) {
-    BinaryOperatorReducer reducer(editor, graph(), common(), machine());
-    return reducer.Reduce(node);
-  }
-
-  Reduction Reduce(Node* node) {
-    StrictMock<MockAdvancedReducerEditor> editor;
-    return Reduce(&editor, node);
-  }
-
-  MachineOperatorBuilder* machine() { return &machine_; }
-  SimplifiedOperatorBuilder* simplified() { return &simplified_; }
-
- private:
-  MachineOperatorBuilder machine_;
-  SimplifiedOperatorBuilder simplified_;
-};
-
-
-TEST_F(BinaryOperatorReducerTest, Div52OfMul52) {
-  // This reduction applies only to 64bit arch
-  if (!machine()->Is64()) return;
-
-  Node* p0 = Parameter(0);
-  Node* p1 = Parameter(1);
-  Node* t0 = graph()->NewNode(machine()->ChangeInt32ToFloat64(), p0);
-  Node* t1 = graph()->NewNode(machine()->ChangeInt32ToFloat64(), p1);
-
-  Type* mul_range = Type::Range(0x0, 0xFFFFFFFFFFFFFULL, graph()->zone());
-  Node* mul = graph()->NewNode(machine()->Float64Mul(), t0, t1);
-  NodeProperties::SetType(
-      mul, Type::Intersect(mul_range, Type::Number(), graph()->zone()));
-
-  Node* mul_replacement;
-  auto mul_matcher = IsInt64Mul(p0, p1);
-  {
-    StrictMock<MockAdvancedReducerEditor> editor;
-
-    EXPECT_CALL(editor, Revisit(mul_matcher));
-
-    Reduction r = Reduce(&editor, mul);
-    ASSERT_TRUE(r.Changed());
-    mul_replacement = r.replacement();
-    EXPECT_THAT(mul_replacement, IsRoundInt64ToFloat64(mul_matcher));
-  }
-
-  {
-    StrictMock<MockAdvancedReducerEditor> editor;
-
-    Node* power = Float64Constant(0x4000000);
-    Node* div =
-        graph()->NewNode(machine()->Float64Div(), mul_replacement, power);
-
-    auto shr_matcher = IsWord64Shr(mul_matcher, IsInt64Constant(26));
-    EXPECT_CALL(editor, Revisit(shr_matcher));
-
-    Reduction r = Reduce(&editor, div);
-    ASSERT_TRUE(r.Changed());
-    EXPECT_THAT(r.replacement(), IsRoundInt64ToFloat64(shr_matcher));
-  }
-}
-
-}  // namespace compiler
-}  // namespace internal
-}  // namespace v8