Convert compiler cctest to unit tests, part 1

test/cctest/compiler/test-graph-reducer.cc

Index: test/cctest/compiler/test-graph-reducer.cc
diff --git a/test/cctest/compiler/test-graph-reducer.cc b/test/cctest/compiler/test-graph-reducer.cc
deleted file mode 100644
index d425c90aae2635c600220805e2189ed133f10dcc..0000000000000000000000000000000000000000
--- a/test/cctest/compiler/test-graph-reducer.cc
+++ /dev/null
@@ -1,627 +0,0 @@
-// 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 <set>
-
-#include "src/v8.h"
-
-#include "graph-tester.h"
-#include "src/compiler/graph-reducer.h"
-#include "src/compiler/node.h"
-#include "src/compiler/operator.h"
-
-using namespace v8::internal;
-using namespace v8::internal::compiler;
-
-const uint8_t OPCODE_A0 = 10;
-const uint8_t OPCODE_A1 = 11;
-const uint8_t OPCODE_A2 = 12;
-const uint8_t OPCODE_B0 = 20;
-const uint8_t OPCODE_B1 = 21;
-const uint8_t OPCODE_B2 = 22;
-const uint8_t OPCODE_C0 = 30;
-const uint8_t OPCODE_C1 = 31;
-const uint8_t OPCODE_C2 = 32;
-
-static Operator OPA0(OPCODE_A0, Operator::kNoWrite, "opa0", 0, 0, 0, 0, 0, 0);
-static Operator OPA1(OPCODE_A1, Operator::kNoWrite, "opa1", 1, 0, 0, 0, 0, 0);
-static Operator OPA2(OPCODE_A2, Operator::kNoWrite, "opa2", 2, 0, 0, 0, 0, 0);
-static Operator OPB0(OPCODE_B0, Operator::kNoWrite, "opa0", 0, 0, 0, 0, 0, 0);
-static Operator OPB1(OPCODE_B1, Operator::kNoWrite, "opa1", 1, 0, 0, 0, 0, 0);
-static Operator OPB2(OPCODE_B2, Operator::kNoWrite, "opa2", 2, 0, 0, 0, 0, 0);
-static Operator OPC0(OPCODE_C0, Operator::kNoWrite, "opc0", 0, 0, 0, 0, 0, 0);
-static Operator OPC1(OPCODE_C1, Operator::kNoWrite, "opc1", 1, 0, 0, 0, 0, 0);
-static Operator OPC2(OPCODE_C2, Operator::kNoWrite, "opc2", 2, 0, 0, 0, 0, 0);
-
-
-// Replaces all "A" operators with "B" operators without creating new nodes.
-class InPlaceABReducer : public Reducer {
- public:
-  virtual Reduction Reduce(Node* node) {
-    switch (node->op()->opcode()) {
-      case OPCODE_A0:
-        CHECK_EQ(0, node->InputCount());
-        node->set_op(&OPB0);
-        return Replace(node);
-      case OPCODE_A1:
-        CHECK_EQ(1, node->InputCount());
-        node->set_op(&OPB1);
-        return Replace(node);
-      case OPCODE_A2:
-        CHECK_EQ(2, node->InputCount());
-        node->set_op(&OPB2);
-        return Replace(node);
-    }
-    return NoChange();
-  }
-};
-
-
-// Replaces all "A" operators with "B" operators by allocating new nodes.
-class NewABReducer : public Reducer {
- public:
-  explicit NewABReducer(Graph* graph) : graph_(graph) {}
-  virtual Reduction Reduce(Node* node) {
-    switch (node->op()->opcode()) {
-      case OPCODE_A0:
-        CHECK_EQ(0, node->InputCount());
-        return Replace(graph_->NewNode(&OPB0));
-      case OPCODE_A1:
-        CHECK_EQ(1, node->InputCount());
-        return Replace(graph_->NewNode(&OPB1, node->InputAt(0)));
-      case OPCODE_A2:
-        CHECK_EQ(2, node->InputCount());
-        return Replace(
-            graph_->NewNode(&OPB2, node->InputAt(0), node->InputAt(1)));
-    }
-    return NoChange();
-  }
-  Graph* graph_;
-};
-
-
-// Replaces all "B" operators with "C" operators without creating new nodes.
-class InPlaceBCReducer : public Reducer {
- public:
-  virtual Reduction Reduce(Node* node) {
-    switch (node->op()->opcode()) {
-      case OPCODE_B0:
-        CHECK_EQ(0, node->InputCount());
-        node->set_op(&OPC0);
-        return Replace(node);
-      case OPCODE_B1:
-        CHECK_EQ(1, node->InputCount());
-        node->set_op(&OPC1);
-        return Replace(node);
-      case OPCODE_B2:
-        CHECK_EQ(2, node->InputCount());
-        node->set_op(&OPC2);
-        return Replace(node);
-    }
-    return NoChange();
-  }
-};
-
-
-// Wraps all "OPA0" nodes in "OPB1" operators by allocating new nodes.
-class A0Wrapper FINAL : public Reducer {
- public:
-  explicit A0Wrapper(Graph* graph) : graph_(graph) {}
-  virtual Reduction Reduce(Node* node) OVERRIDE {
-    switch (node->op()->opcode()) {
-      case OPCODE_A0:
-        CHECK_EQ(0, node->InputCount());
-        return Replace(graph_->NewNode(&OPB1, node));
-    }
-    return NoChange();
-  }
-  Graph* graph_;
-};
-
-
-// Wraps all "OPB0" nodes in two "OPC1" operators by allocating new nodes.
-class B0Wrapper FINAL : public Reducer {
- public:
-  explicit B0Wrapper(Graph* graph) : graph_(graph) {}
-  virtual Reduction Reduce(Node* node) OVERRIDE {
-    switch (node->op()->opcode()) {
-      case OPCODE_B0:
-        CHECK_EQ(0, node->InputCount());
-        return Replace(graph_->NewNode(&OPC1, graph_->NewNode(&OPC1, node)));
-    }
-    return NoChange();
-  }
-  Graph* graph_;
-};
-
-
-// Replaces all "OPA1" nodes with the first input.
-class A1Forwarder : public Reducer {
-  virtual Reduction Reduce(Node* node) {
-    switch (node->op()->opcode()) {
-      case OPCODE_A1:
-        CHECK_EQ(1, node->InputCount());
-        return Replace(node->InputAt(0));
-    }
-    return NoChange();
-  }
-};
-
-
-// Replaces all "OPB1" nodes with the first input.
-class B1Forwarder : public Reducer {
-  virtual Reduction Reduce(Node* node) {
-    switch (node->op()->opcode()) {
-      case OPCODE_B1:
-        CHECK_EQ(1, node->InputCount());
-        return Replace(node->InputAt(0));
-    }
-    return NoChange();
-  }
-};
-
-
-// Swaps the inputs to "OP2A" and "OP2B" nodes based on ids.
-class AB2Sorter : public Reducer {
-  virtual Reduction Reduce(Node* node) {
-    switch (node->op()->opcode()) {
-      case OPCODE_A2:
-      case OPCODE_B2:
-        CHECK_EQ(2, node->InputCount());
-        Node* x = node->InputAt(0);
-        Node* y = node->InputAt(1);
-        if (x->id() > y->id()) {
-          node->ReplaceInput(0, y);
-          node->ReplaceInput(1, x);
-          return Replace(node);
-        }
-    }
-    return NoChange();
-  }
-};
-
-
-// Simply records the nodes visited.
-class ReducerRecorder : public Reducer {
- public:
-  typedef std::set<Node*, std::less<Node*>, zone_allocator<Node*>> NodeSet;
-  explicit ReducerRecorder(Zone* zone)
-      : set(NodeSet::key_compare(), NodeSet::allocator_type(zone)) {}
-  virtual Reduction Reduce(Node* node) {
-    set.insert(node);
-    return NoChange();
-  }
-  void CheckContains(Node* node) {
-    CHECK_EQ(1, static_cast<int>(set.count(node)));
-  }
-  NodeSet set;
-};
-
-
-TEST(ReduceGraphFromEnd1) {
-  GraphTester graph;
-
-  Node* n1 = graph.NewNode(&OPA0);
-  Node* end = graph.NewNode(&OPA1, n1);
-  graph.SetEnd(end);
-
-  GraphReducer reducer(&graph, graph.zone());
-  ReducerRecorder recorder(graph.zone());
-  reducer.AddReducer(&recorder);
-  reducer.ReduceGraph();
-  recorder.CheckContains(n1);
-  recorder.CheckContains(end);
-}
-
-
-TEST(ReduceGraphFromEnd2) {
-  GraphTester graph;
-
-  Node* n1 = graph.NewNode(&OPA0);
-  Node* n2 = graph.NewNode(&OPA1, n1);
-  Node* n3 = graph.NewNode(&OPA1, n1);
-  Node* end = graph.NewNode(&OPA2, n2, n3);
-  graph.SetEnd(end);
-
-  GraphReducer reducer(&graph, graph.zone());
-  ReducerRecorder recorder(graph.zone());
-  reducer.AddReducer(&recorder);
-  reducer.ReduceGraph();
-  recorder.CheckContains(n1);
-  recorder.CheckContains(n2);
-  recorder.CheckContains(n3);
-  recorder.CheckContains(end);
-}
-
-
-TEST(ReduceInPlace1) {
-  GraphTester graph;
-
-  Node* n1 = graph.NewNode(&OPA0);
-  Node* end = graph.NewNode(&OPA1, n1);
-  graph.SetEnd(end);
-
-  GraphReducer reducer(&graph, graph.zone());
-  InPlaceABReducer r;
-  reducer.AddReducer(&r);
-
-  // Tests A* => B* with in-place updates.
-  for (int i = 0; i < 3; i++) {
-    int before = graph.NodeCount();
-    reducer.ReduceGraph();
-    CHECK_EQ(before, graph.NodeCount());
-    CHECK_EQ(&OPB0, n1->op());
-    CHECK_EQ(&OPB1, end->op());
-    CHECK_EQ(n1, end->InputAt(0));
-  }
-}
-
-
-TEST(ReduceInPlace2) {
-  GraphTester graph;
-
-  Node* n1 = graph.NewNode(&OPA0);
-  Node* n2 = graph.NewNode(&OPA1, n1);
-  Node* n3 = graph.NewNode(&OPA1, n1);
-  Node* end = graph.NewNode(&OPA2, n2, n3);
-  graph.SetEnd(end);
-
-  GraphReducer reducer(&graph, graph.zone());
-  InPlaceABReducer r;
-  reducer.AddReducer(&r);
-
-  // Tests A* => B* with in-place updates.
-  for (int i = 0; i < 3; i++) {
-    int before = graph.NodeCount();
-    reducer.ReduceGraph();
-    CHECK_EQ(before, graph.NodeCount());
-    CHECK_EQ(&OPB0, n1->op());
-    CHECK_EQ(&OPB1, n2->op());
-    CHECK_EQ(n1, n2->InputAt(0));
-    CHECK_EQ(&OPB1, n3->op());
-    CHECK_EQ(n1, n3->InputAt(0));
-    CHECK_EQ(&OPB2, end->op());
-    CHECK_EQ(n2, end->InputAt(0));
-    CHECK_EQ(n3, end->InputAt(1));
-  }
-}
-
-
-TEST(ReduceNew1) {
-  GraphTester graph;
-
-  Node* n1 = graph.NewNode(&OPA0);
-  Node* n2 = graph.NewNode(&OPA1, n1);
-  Node* n3 = graph.NewNode(&OPA1, n1);
-  Node* end = graph.NewNode(&OPA2, n2, n3);
-  graph.SetEnd(end);
-
-  GraphReducer reducer(&graph, graph.zone());
-  NewABReducer r(&graph);
-  reducer.AddReducer(&r);
-
-  // Tests A* => B* while creating new nodes.
-  for (int i = 0; i < 3; i++) {
-    int before = graph.NodeCount();
-    reducer.ReduceGraph();
-    if (i == 0) {
-      CHECK_NE(before, graph.NodeCount());
-    } else {
-      CHECK_EQ(before, graph.NodeCount());
-    }
-    Node* nend = graph.end();
-    CHECK_NE(end, nend);  // end() should be updated too.
-
-    Node* nn2 = nend->InputAt(0);
-    Node* nn3 = nend->InputAt(1);
-    Node* nn1 = nn2->InputAt(0);
-
-    CHECK_EQ(nn1, nn3->InputAt(0));
-
-    CHECK_EQ(&OPB0, nn1->op());
-    CHECK_EQ(&OPB1, nn2->op());
-    CHECK_EQ(&OPB1, nn3->op());
-    CHECK_EQ(&OPB2, nend->op());
-  }
-}
-
-
-TEST(Wrapping1) {
-  GraphTester graph;
-
-  Node* end = graph.NewNode(&OPA0);
-  graph.SetEnd(end);
-  CHECK_EQ(1, graph.NodeCount());
-
-  GraphReducer reducer(&graph, graph.zone());
-  A0Wrapper r(&graph);
-  reducer.AddReducer(&r);
-
-  reducer.ReduceGraph();
-  CHECK_EQ(2, graph.NodeCount());
-
-  Node* nend = graph.end();
-  CHECK_NE(end, nend);
-  CHECK_EQ(&OPB1, nend->op());
-  CHECK_EQ(1, nend->InputCount());
-  CHECK_EQ(end, nend->InputAt(0));
-}
-
-
-TEST(Wrapping2) {
-  GraphTester graph;
-
-  Node* end = graph.NewNode(&OPB0);
-  graph.SetEnd(end);
-  CHECK_EQ(1, graph.NodeCount());
-
-  GraphReducer reducer(&graph, graph.zone());
-  B0Wrapper r(&graph);
-  reducer.AddReducer(&r);
-
-  reducer.ReduceGraph();
-  CHECK_EQ(3, graph.NodeCount());
-
-  Node* nend = graph.end();
-  CHECK_NE(end, nend);
-  CHECK_EQ(&OPC1, nend->op());
-  CHECK_EQ(1, nend->InputCount());
-
-  Node* n1 = nend->InputAt(0);
-  CHECK_NE(end, n1);
-  CHECK_EQ(&OPC1, n1->op());
-  CHECK_EQ(1, n1->InputCount());
-  CHECK_EQ(end, n1->InputAt(0));
-}
-
-
-TEST(Forwarding1) {
-  GraphTester graph;
-
-  Node* n1 = graph.NewNode(&OPA0);
-  Node* end = graph.NewNode(&OPA1, n1);
-  graph.SetEnd(end);
-
-  GraphReducer reducer(&graph, graph.zone());
-  A1Forwarder r;
-  reducer.AddReducer(&r);
-
-  // Tests A1(x) => x
-  for (int i = 0; i < 3; i++) {
-    int before = graph.NodeCount();
-    reducer.ReduceGraph();
-    CHECK_EQ(before, graph.NodeCount());
-    CHECK_EQ(&OPA0, n1->op());
-    CHECK_EQ(n1, graph.end());
-  }
-}
-
-
-TEST(Forwarding2) {
-  GraphTester graph;
-
-  Node* n1 = graph.NewNode(&OPA0);
-  Node* n2 = graph.NewNode(&OPA1, n1);
-  Node* n3 = graph.NewNode(&OPA1, n1);
-  Node* end = graph.NewNode(&OPA2, n2, n3);
-  graph.SetEnd(end);
-
-  GraphReducer reducer(&graph, graph.zone());
-  A1Forwarder r;
-  reducer.AddReducer(&r);
-
-  // Tests reducing A2(A1(x), A1(y)) => A2(x, y).
-  for (int i = 0; i < 3; i++) {
-    int before = graph.NodeCount();
-    reducer.ReduceGraph();
-    CHECK_EQ(before, graph.NodeCount());
-    CHECK_EQ(&OPA0, n1->op());
-    CHECK_EQ(n1, end->InputAt(0));
-    CHECK_EQ(n1, end->InputAt(1));
-    CHECK_EQ(&OPA2, end->op());
-    CHECK_EQ(0, n2->UseCount());
-    CHECK_EQ(0, n3->UseCount());
-  }
-}
-
-
-TEST(Forwarding3) {
-  // Tests reducing a chain of A1(A1(A1(A1(x)))) => x.
-  for (int i = 0; i < 8; i++) {
-    GraphTester graph;
-
-    Node* n1 = graph.NewNode(&OPA0);
-    Node* end = n1;
-    for (int j = 0; j < i; j++) {
-      end = graph.NewNode(&OPA1, end);
-    }
-    graph.SetEnd(end);
-
-    GraphReducer reducer(&graph, graph.zone());
-    A1Forwarder r;
-    reducer.AddReducer(&r);
-
-    for (int i = 0; i < 3; i++) {
-      int before = graph.NodeCount();
-      reducer.ReduceGraph();
-      CHECK_EQ(before, graph.NodeCount());
-      CHECK_EQ(&OPA0, n1->op());
-      CHECK_EQ(n1, graph.end());
-    }
-  }
-}
-
-
-TEST(ReduceForward1) {
-  GraphTester graph;
-
-  Node* n1 = graph.NewNode(&OPA0);
-  Node* n2 = graph.NewNode(&OPA1, n1);
-  Node* n3 = graph.NewNode(&OPA1, n1);
-  Node* end = graph.NewNode(&OPA2, n2, n3);
-  graph.SetEnd(end);
-
-  GraphReducer reducer(&graph, graph.zone());
-  InPlaceABReducer r;
-  B1Forwarder f;
-  reducer.AddReducer(&r);
-  reducer.AddReducer(&f);
-
-  // Tests first reducing A => B, then B1(x) => x.
-  for (int i = 0; i < 3; i++) {
-    int before = graph.NodeCount();
-    reducer.ReduceGraph();
-    CHECK_EQ(before, graph.NodeCount());
-    CHECK_EQ(&OPB0, n1->op());
-    CHECK(n2->IsDead());
-    CHECK_EQ(n1, end->InputAt(0));
-    CHECK(n3->IsDead());
-    CHECK_EQ(n1, end->InputAt(0));
-    CHECK_EQ(&OPB2, end->op());
-    CHECK_EQ(0, n2->UseCount());
-    CHECK_EQ(0, n3->UseCount());
-  }
-}
-
-
-TEST(Sorter1) {
-  HandleAndZoneScope scope;
-  AB2Sorter r;
-  for (int i = 0; i < 6; i++) {
-    GraphTester graph;
-
-    Node* n1 = graph.NewNode(&OPA0);
-    Node* n2 = graph.NewNode(&OPA1, n1);
-    Node* n3 = graph.NewNode(&OPA1, n1);
-    Node* end = NULL;  // Initialize to please the compiler.
-
-    if (i == 0) end = graph.NewNode(&OPA2, n2, n3);
-    if (i == 1) end = graph.NewNode(&OPA2, n3, n2);
-    if (i == 2) end = graph.NewNode(&OPA2, n2, n1);
-    if (i == 3) end = graph.NewNode(&OPA2, n1, n2);
-    if (i == 4) end = graph.NewNode(&OPA2, n3, n1);
-    if (i == 5) end = graph.NewNode(&OPA2, n1, n3);
-
-    graph.SetEnd(end);
-
-    GraphReducer reducer(&graph, graph.zone());
-    reducer.AddReducer(&r);
-
-    int before = graph.NodeCount();
-    reducer.ReduceGraph();
-    CHECK_EQ(before, graph.NodeCount());
-    CHECK_EQ(&OPA0, n1->op());
-    CHECK_EQ(&OPA1, n2->op());
-    CHECK_EQ(&OPA1, n3->op());
-    CHECK_EQ(&OPA2, end->op());
-    CHECK_EQ(end, graph.end());
-    CHECK(end->InputAt(0)->id() <= end->InputAt(1)->id());
-  }
-}
-
-
-// Generate a node graph with the given permutations.
-void GenDAG(Graph* graph, int* p3, int* p2, int* p1) {
-  Node* level4 = graph->NewNode(&OPA0);
-  Node* level3[] = {graph->NewNode(&OPA1, level4),
-                    graph->NewNode(&OPA1, level4)};
-
-  Node* level2[] = {graph->NewNode(&OPA1, level3[p3[0]]),
-                    graph->NewNode(&OPA1, level3[p3[1]]),
-                    graph->NewNode(&OPA1, level3[p3[0]]),
-                    graph->NewNode(&OPA1, level3[p3[1]])};
-
-  Node* level1[] = {graph->NewNode(&OPA2, level2[p2[0]], level2[p2[1]]),
-                    graph->NewNode(&OPA2, level2[p2[2]], level2[p2[3]])};
-
-  Node* end = graph->NewNode(&OPA2, level1[p1[0]], level1[p1[1]]);
-  graph->SetEnd(end);
-}
-
-
-TEST(SortForwardReduce) {
-  GraphTester graph;
-
-  // Tests combined reductions on a series of DAGs.
-  for (int j = 0; j < 2; j++) {
-    int p3[] = {j, 1 - j};
-    for (int m = 0; m < 2; m++) {
-      int p1[] = {m, 1 - m};
-      for (int k = 0; k < 24; k++) {  // All permutations of 0, 1, 2, 3
-        int p2[] = {-1, -1, -1, -1};
-        int n = k;
-        for (int d = 4; d >= 1; d--) {  // Construct permutation.
-          int p = n % d;
-          for (int z = 0; z < 4; z++) {
-            if (p2[z] == -1) {
-              if (p == 0) p2[z] = d - 1;
-              p--;
-            }
-          }
-          n = n / d;
-        }
-
-        GenDAG(&graph, p3, p2, p1);
-
-        GraphReducer reducer(&graph, graph.zone());
-        AB2Sorter r1;
-        A1Forwarder r2;
-        InPlaceABReducer r3;
-        reducer.AddReducer(&r1);
-        reducer.AddReducer(&r2);
-        reducer.AddReducer(&r3);
-
-        reducer.ReduceGraph();
-
-        Node* end = graph.end();
-        CHECK_EQ(&OPB2, end->op());
-        Node* n1 = end->InputAt(0);
-        Node* n2 = end->InputAt(1);
-        CHECK_NE(n1, n2);
-        CHECK(n1->id() < n2->id());
-        CHECK_EQ(&OPB2, n1->op());
-        CHECK_EQ(&OPB2, n2->op());
-        Node* n4 = n1->InputAt(0);
-        CHECK_EQ(&OPB0, n4->op());
-        CHECK_EQ(n4, n1->InputAt(1));
-        CHECK_EQ(n4, n2->InputAt(0));
-        CHECK_EQ(n4, n2->InputAt(1));
-      }
-    }
-  }
-}
-
-
-TEST(Order) {
-  // Test that the order of reducers doesn't matter, as they should be
-  // rerun for changed nodes.
-  for (int i = 0; i < 2; i++) {
-    GraphTester graph;
-
-    Node* n1 = graph.NewNode(&OPA0);
-    Node* end = graph.NewNode(&OPA1, n1);
-    graph.SetEnd(end);
-
-    GraphReducer reducer(&graph, graph.zone());
-    InPlaceABReducer abr;
-    InPlaceBCReducer bcr;
-    if (i == 0) {
-      reducer.AddReducer(&abr);
-      reducer.AddReducer(&bcr);
-    } else {
-      reducer.AddReducer(&bcr);
-      reducer.AddReducer(&abr);
-    }
-
-    // Tests A* => C* with in-place updates.
-    for (int i = 0; i < 3; i++) {
-      int before = graph.NodeCount();
-      reducer.ReduceGraph();
-      CHECK_EQ(before, graph.NodeCount());
-      CHECK_EQ(&OPC0, n1->op());
-      CHECK_EQ(&OPC1, end->op());
-      CHECK_EQ(n1, end->InputAt(0));
-    }
-  }
-}