// Copyright 2015 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "src/compiler/access-builder.h"
#include "src/compiler/diamond.h"
#include "src/compiler/js-graph.h"
#include "src/compiler/js-intrinsic-lowering.h"
#include "src/compiler/js-operator.h"
#include "test/unittests/compiler/graph-unittest.h"
#include "test/unittests/compiler/node-test-utils.h"
#include "testing/gmock-support.h"


using testing::_;
using testing::AllOf;
using testing::BitEq;
using testing::Capture;
using testing::CaptureEq;


namespace v8 {
namespace internal {
namespace compiler {

class JSIntrinsicLoweringTest : public GraphTest {
 public:
  JSIntrinsicLoweringTest() : GraphTest(3), javascript_(zone()) {}
  ~JSIntrinsicLoweringTest() override {}

 protected:
  Reduction Reduce(Node* node, MachineOperatorBuilder::Flags flags =
                                   MachineOperatorBuilder::kNoFlags) {
    MachineOperatorBuilder machine(zone(), kMachPtr, flags);
    JSGraph jsgraph(isolate(), graph(), common(), javascript(), &machine);
    JSIntrinsicLowering reducer(&jsgraph);
    return reducer.Reduce(node);
  }

  Node* EmptyFrameState() {
    MachineOperatorBuilder machine(zone());
    JSGraph jsgraph(isolate(), graph(), common(), javascript(), &machine);
    return jsgraph.EmptyFrameState();
  }

  JSOperatorBuilder* javascript() { return &javascript_; }

 private:
  JSOperatorBuilder javascript_;
};


// -----------------------------------------------------------------------------
// %_ConstructDouble


TEST_F(JSIntrinsicLoweringTest, InlineOptimizedConstructDouble) {
  Node* const input0 = Parameter(0);
  Node* const input1 = Parameter(1);
  Node* const context = Parameter(2);
  Node* const effect = graph()->start();
  Node* const control = graph()->start();
  Reduction const r = Reduce(graph()->NewNode(
      javascript()->CallRuntime(Runtime::kInlineConstructDouble, 2), input0,
      input1, context, effect, control));
  ASSERT_TRUE(r.Changed());
  EXPECT_THAT(r.replacement(), IsFloat64InsertHighWord32(
                                   IsFloat64InsertLowWord32(
                                       IsNumberConstant(BitEq(0.0)), input1),
                                   input0));
}


// -----------------------------------------------------------------------------
// %_DoubleLo


TEST_F(JSIntrinsicLoweringTest, InlineOptimizedDoubleLo) {
  Node* const input = Parameter(0);
  Node* const context = Parameter(1);
  Node* const effect = graph()->start();
  Node* const control = graph()->start();
  Reduction const r = Reduce(
      graph()->NewNode(javascript()->CallRuntime(Runtime::kInlineDoubleLo, 1),
                       input, context, effect, control));
  ASSERT_TRUE(r.Changed());
  EXPECT_THAT(r.replacement(), IsFloat64ExtractLowWord32(input));
}


// -----------------------------------------------------------------------------
// %_DoubleHi


TEST_F(JSIntrinsicLoweringTest, InlineOptimizedDoubleHi) {
  Node* const input = Parameter(0);
  Node* const context = Parameter(1);
  Node* const effect = graph()->start();
  Node* const control = graph()->start();
  Reduction const r = Reduce(
      graph()->NewNode(javascript()->CallRuntime(Runtime::kInlineDoubleHi, 1),
                       input, context, effect, control));
  ASSERT_TRUE(r.Changed());
  EXPECT_THAT(r.replacement(), IsFloat64ExtractHighWord32(input));
}


// -----------------------------------------------------------------------------
// %_IsSmi


TEST_F(JSIntrinsicLoweringTest, InlineIsSmi) {
  Node* const input = Parameter(0);
  Node* const context = Parameter(1);
  Node* const effect = graph()->start();
  Node* const control = graph()->start();
  Reduction const r = Reduce(
      graph()->NewNode(javascript()->CallRuntime(Runtime::kInlineIsSmi, 1),
                       input, context, effect, control));
  ASSERT_TRUE(r.Changed());
  EXPECT_THAT(r.replacement(), IsObjectIsSmi(input));
}


// -----------------------------------------------------------------------------
// %_IsNonNegativeSmi


TEST_F(JSIntrinsicLoweringTest, InlineIsNonNegativeSmi) {
  Node* const input = Parameter(0);
  Node* const context = Parameter(1);
  Node* const effect = graph()->start();
  Node* const control = graph()->start();
  Reduction const r = Reduce(graph()->NewNode(
      javascript()->CallRuntime(Runtime::kInlineIsNonNegativeSmi, 1), input,
      context, effect, control));
  ASSERT_TRUE(r.Changed());
  EXPECT_THAT(r.replacement(), IsObjectIsNonNegativeSmi(input));
}


// -----------------------------------------------------------------------------
// %_IsArray


TEST_F(JSIntrinsicLoweringTest, InlineIsArray) {
  Node* const input = Parameter(0);
  Node* const context = Parameter(1);
  Node* const effect = graph()->start();
  Node* const control = graph()->start();
  Reduction const r = Reduce(
      graph()->NewNode(javascript()->CallRuntime(Runtime::kInlineIsArray, 1),
                       input, context, effect, control));
  ASSERT_TRUE(r.Changed());

  Node* phi = r.replacement();
  Capture<Node*> branch, if_false;
  EXPECT_THAT(
      phi,
      IsPhi(
          static_cast<MachineType>(kTypeBool | kRepTagged), IsFalseConstant(),
          IsWord32Equal(IsLoadField(AccessBuilder::ForMapInstanceType(),
                                    IsLoadField(AccessBuilder::ForMap(), input,
                                                effect, CaptureEq(&if_false)),
                                    effect, _),
                        IsInt32Constant(JS_ARRAY_TYPE)),
          IsMerge(IsIfTrue(AllOf(CaptureEq(&branch),
                                 IsBranch(IsObjectIsSmi(input), control))),
                  AllOf(CaptureEq(&if_false), IsIfFalse(CaptureEq(&branch))))));
}


// -----------------------------------------------------------------------------
// %_IsFunction


TEST_F(JSIntrinsicLoweringTest, InlineIsFunction) {
  Node* const input = Parameter(0);
  Node* const context = Parameter(1);
  Node* const effect = graph()->start();
  Node* const control = graph()->start();
  Reduction const r = Reduce(
      graph()->NewNode(javascript()->CallRuntime(Runtime::kInlineIsFunction, 1),
                       input, context, effect, control));
  ASSERT_TRUE(r.Changed());

  Node* phi = r.replacement();
  Capture<Node*> branch, if_false;
  EXPECT_THAT(
      phi,
      IsPhi(
          static_cast<MachineType>(kTypeBool | kRepTagged), IsFalseConstant(),
          IsWord32Equal(IsLoadField(AccessBuilder::ForMapInstanceType(),
                                    IsLoadField(AccessBuilder::ForMap(), input,
                                                effect, CaptureEq(&if_false)),
                                    effect, _),
                        IsInt32Constant(JS_FUNCTION_TYPE)),
          IsMerge(IsIfTrue(AllOf(CaptureEq(&branch),
                                 IsBranch(IsObjectIsSmi(input), control))),
                  AllOf(CaptureEq(&if_false), IsIfFalse(CaptureEq(&branch))))));
}


// -----------------------------------------------------------------------------
// %_IsRegExp


TEST_F(JSIntrinsicLoweringTest, InlineIsRegExp) {
  Node* const input = Parameter(0);
  Node* const context = Parameter(1);
  Node* const effect = graph()->start();
  Node* const control = graph()->start();
  Reduction const r = Reduce(
      graph()->NewNode(javascript()->CallRuntime(Runtime::kInlineIsRegExp, 1),
                       input, context, effect, control));
  ASSERT_TRUE(r.Changed());

  Node* phi = r.replacement();
  Capture<Node*> branch, if_false;
  EXPECT_THAT(
      phi,
      IsPhi(
          static_cast<MachineType>(kTypeBool | kRepTagged), IsFalseConstant(),
          IsWord32Equal(IsLoadField(AccessBuilder::ForMapInstanceType(),
                                    IsLoadField(AccessBuilder::ForMap(), input,
                                                effect, CaptureEq(&if_false)),
                                    effect, _),
                        IsInt32Constant(JS_REGEXP_TYPE)),
          IsMerge(IsIfTrue(AllOf(CaptureEq(&branch),
                                 IsBranch(IsObjectIsSmi(input), control))),
                  AllOf(CaptureEq(&if_false), IsIfFalse(CaptureEq(&branch))))));
}


// -----------------------------------------------------------------------------
// %_JSValueGetValue


TEST_F(JSIntrinsicLoweringTest, InlineJSValueGetValue) {
  Node* const input = Parameter(0);
  Node* const context = Parameter(1);
  Node* const effect = graph()->start();
  Node* const control = graph()->start();
  Reduction const r = Reduce(graph()->NewNode(
      javascript()->CallRuntime(Runtime::kInlineJSValueGetValue, 1), input,
      context, effect, control));
  ASSERT_TRUE(r.Changed());
  EXPECT_THAT(r.replacement(),
              IsLoadField(AccessBuilder::ForValue(), input, effect, control));
}


// -----------------------------------------------------------------------------
// %_Likely

TEST_F(JSIntrinsicLoweringTest, Likely) {
  Node* const input = Parameter(0);
  Node* const context = Parameter(1);
  Node* const effect = graph()->start();
  Node* const control = graph()->start();
  Node* const likely =
      graph()->NewNode(javascript()->CallRuntime(Runtime::kInlineLikely, 1),
                       input, context, effect, control);
  Node* const to_boolean =
      graph()->NewNode(javascript()->ToBoolean(), likely, context);
  Diamond d(graph(), common(), to_boolean);
  graph()->SetEnd(graph()->NewNode(common()->End(), d.merge));

  ASSERT_EQ(BranchHint::kNone, BranchHintOf(d.branch->op()));
  Reduction const r = Reduce(likely);
  ASSERT_TRUE(r.Changed());
  EXPECT_THAT(r.replacement(), input);
  ASSERT_EQ(BranchHint::kTrue, BranchHintOf(d.branch->op()));
}


// -----------------------------------------------------------------------------
// %_MathFloor


TEST_F(JSIntrinsicLoweringTest, InlineMathFloor) {
  Node* const input = Parameter(0);
  Node* const context = Parameter(1);
  Node* const effect = graph()->start();
  Node* const control = graph()->start();
  Reduction const r = Reduce(
      graph()->NewNode(javascript()->CallRuntime(Runtime::kInlineMathFloor, 1),
                       input, context, effect, control),
      MachineOperatorBuilder::kFloat64RoundDown);
  ASSERT_TRUE(r.Changed());
  EXPECT_THAT(r.replacement(), IsFloat64RoundDown(input));
}


// -----------------------------------------------------------------------------
// %_MathSqrt


TEST_F(JSIntrinsicLoweringTest, InlineMathSqrt) {
  Node* const input = Parameter(0);
  Node* const context = Parameter(1);
  Node* const effect = graph()->start();
  Node* const control = graph()->start();
  Reduction const r = Reduce(
      graph()->NewNode(javascript()->CallRuntime(Runtime::kInlineMathSqrt, 1),
                       input, context, effect, control));
  ASSERT_TRUE(r.Changed());
  EXPECT_THAT(r.replacement(), IsFloat64Sqrt(input));
}


// -----------------------------------------------------------------------------
// %_StringGetLength


TEST_F(JSIntrinsicLoweringTest, InlineStringGetLength) {
  Node* const input = Parameter(0);
  Node* const context = Parameter(1);
  Node* const effect = graph()->start();
  Node* const control = graph()->start();
  Reduction const r = Reduce(graph()->NewNode(
      javascript()->CallRuntime(Runtime::kInlineStringGetLength, 1), input,
      context, effect, control));
  ASSERT_TRUE(r.Changed());
  EXPECT_THAT(r.replacement(),
              IsLoadField(AccessBuilder::ForStringLength(zone()), input, effect,
                          control));
}


// -----------------------------------------------------------------------------
// %_MathClz32


TEST_F(JSIntrinsicLoweringTest, InlineMathClz32) {
  Node* const input = Parameter(0);
  Node* const context = Parameter(1);
  Node* const effect = graph()->start();
  Node* const control = graph()->start();
  Reduction const r = Reduce(
      graph()->NewNode(javascript()->CallRuntime(Runtime::kInlineMathClz32, 1),
                       input, context, effect, control));
  ASSERT_TRUE(r.Changed());
  EXPECT_THAT(r.replacement(), IsWord32Clz(input));
}


// -----------------------------------------------------------------------------
// %_Unlikely

TEST_F(JSIntrinsicLoweringTest, Unlikely) {
  Node* const input = Parameter(0);
  Node* const context = Parameter(1);
  Node* const effect = graph()->start();
  Node* const control = graph()->start();
  Node* const unlikely =
      graph()->NewNode(javascript()->CallRuntime(Runtime::kInlineUnlikely, 1),
                       input, context, effect, control);
  Node* const to_boolean =
      graph()->NewNode(javascript()->ToBoolean(), unlikely, context);
  Diamond d(graph(), common(), to_boolean);
  graph()->SetEnd(graph()->NewNode(common()->End(), d.merge));

  ASSERT_EQ(BranchHint::kNone, BranchHintOf(d.branch->op()));
  Reduction const r = Reduce(unlikely);
  ASSERT_TRUE(r.Changed());
  EXPECT_THAT(r.replacement(), input);
  ASSERT_EQ(BranchHint::kFalse, BranchHintOf(d.branch->op()));
}


// -----------------------------------------------------------------------------
// %_ValueOf


TEST_F(JSIntrinsicLoweringTest, InlineValueOf) {
  Node* const input = Parameter(0);
  Node* const context = Parameter(1);
  Node* const effect = graph()->start();
  Node* const control = graph()->start();
  Reduction const r = Reduce(
      graph()->NewNode(javascript()->CallRuntime(Runtime::kInlineValueOf, 1),
                       input, context, effect, control));
  ASSERT_TRUE(r.Changed());

  Node* phi = r.replacement();
  Capture<Node*> branch0, if_false0, branch1, if_true1;
  EXPECT_THAT(
      phi,
      IsPhi(
          kMachAnyTagged, input,
          IsPhi(kMachAnyTagged, IsLoadField(AccessBuilder::ForValue(), input,
                                            effect, CaptureEq(&if_true1)),
                input,
                IsMerge(
                    AllOf(CaptureEq(&if_true1), IsIfTrue(CaptureEq(&branch1))),
                    IsIfFalse(AllOf(
                        CaptureEq(&branch1),
                        IsBranch(
                            IsWord32Equal(
                                IsLoadField(
                                    AccessBuilder::ForMapInstanceType(),
                                    IsLoadField(AccessBuilder::ForMap(), input,
                                                effect, CaptureEq(&if_false0)),
                                    effect, _),
                                IsInt32Constant(JS_VALUE_TYPE)),
                            CaptureEq(&if_false0)))))),
          IsMerge(
              IsIfTrue(AllOf(CaptureEq(&branch0),
                             IsBranch(IsObjectIsSmi(input), control))),
              AllOf(CaptureEq(&if_false0), IsIfFalse(CaptureEq(&branch0))))));
}

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