Remove accidental duplication in cctest suite.

test/cctest/compiler/compiler/test-gap-resolver.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/gap-resolver.h"
-
-#include "src/base/utils/random-number-generator.h"
-#include "test/cctest/cctest.h"
-
-using namespace v8::internal;
-using namespace v8::internal::compiler;
-
-// The state of our move interpreter is the mapping of operands to values. Note
-// that the actual values don't really matter, all we care about is equality.
-class InterpreterState {
- public:
-  typedef std::vector<MoveOperands> Moves;
-
-  void ExecuteInParallel(Moves moves) {
-    InterpreterState copy(*this);
-    for (Moves::iterator it = moves.begin(); it != moves.end(); ++it) {
-      if (!it->IsRedundant()) write(it->destination(), copy.read(it->source()));
-    }
-  }
-
-  bool operator==(const InterpreterState& other) const {
-    return values_ == other.values_;
-  }
-
-  bool operator!=(const InterpreterState& other) const {
-    return values_ != other.values_;
-  }
-
- private:
-  // Internally, the state is a normalized permutation of (kind,index) pairs.
-  typedef std::pair<InstructionOperand::Kind, int> Key;
-  typedef Key Value;
-  typedef std::map<Key, Value> OperandMap;
-
-  Value read(const InstructionOperand* op) const {
-    OperandMap::const_iterator it = values_.find(KeyFor(op));
-    return (it == values_.end()) ? ValueFor(op) : it->second;
-  }
-
-  void write(const InstructionOperand* op, Value v) {
-    if (v == ValueFor(op)) {
-      values_.erase(KeyFor(op));
-    } else {
-      values_[KeyFor(op)] = v;
-    }
-  }
-
-  static Key KeyFor(const InstructionOperand* op) {
-    return Key(op->kind(), op->index());
-  }
-
-  static Value ValueFor(const InstructionOperand* op) {
-    return Value(op->kind(), op->index());
-  }
-
-  friend OStream& operator<<(OStream& os, const InterpreterState& is) {
-    for (OperandMap::const_iterator it = is.values_.begin();
-         it != is.values_.end(); ++it) {
-      if (it != is.values_.begin()) os << " ";
-      InstructionOperand source(it->first.first, it->first.second);
-      InstructionOperand destination(it->second.first, it->second.second);
-      os << MoveOperands(&source, &destination);
-    }
-    return os;
-  }
-
-  OperandMap values_;
-};
-
-
-// An abstract interpreter for moves, swaps and parallel moves.
-class MoveInterpreter : public GapResolver::Assembler {
- public:
-  virtual void AssembleMove(InstructionOperand* source,
-                            InstructionOperand* destination) V8_OVERRIDE {
-    InterpreterState::Moves moves;
-    moves.push_back(MoveOperands(source, destination));
-    state_.ExecuteInParallel(moves);
-  }
-
-  virtual void AssembleSwap(InstructionOperand* source,
-                            InstructionOperand* destination) V8_OVERRIDE {
-    InterpreterState::Moves moves;
-    moves.push_back(MoveOperands(source, destination));
-    moves.push_back(MoveOperands(destination, source));
-    state_.ExecuteInParallel(moves);
-  }
-
-  void AssembleParallelMove(const ParallelMove* pm) {
-    InterpreterState::Moves moves(pm->move_operands()->begin(),
-                                  pm->move_operands()->end());
-    state_.ExecuteInParallel(moves);
-  }
-
-  InterpreterState state() const { return state_; }
-
- private:
-  InterpreterState state_;
-};
-
-
-class ParallelMoveCreator : public HandleAndZoneScope {
- public:
-  ParallelMoveCreator() : rng_(CcTest::random_number_generator()) {}
-
-  ParallelMove* Create(int size) {
-    ParallelMove* parallel_move = new (main_zone()) ParallelMove(main_zone());
-    std::set<InstructionOperand*, InstructionOperandComparator> seen;
-    for (int i = 0; i < size; ++i) {
-      MoveOperands mo(CreateRandomOperand(), CreateRandomOperand());
-      if (!mo.IsRedundant() && seen.find(mo.destination()) == seen.end()) {
-        parallel_move->AddMove(mo.source(), mo.destination(), main_zone());
-        seen.insert(mo.destination());
-      }
-    }
-    return parallel_move;
-  }
-
- private:
-  struct InstructionOperandComparator {
-    bool operator()(const InstructionOperand* x, const InstructionOperand* y) {
-      return (x->kind() < y->kind()) ||
-             (x->kind() == y->kind() && x->index() < y->index());
-    }
-  };
-
-  InstructionOperand* CreateRandomOperand() {
-    int index = rng_->NextInt(6);
-    switch (rng_->NextInt(5)) {
-      case 0:
-        return ConstantOperand::Create(index, main_zone());
-      case 1:
-        return StackSlotOperand::Create(index, main_zone());
-      case 2:
-        return DoubleStackSlotOperand::Create(index, main_zone());
-      case 3:
-        return RegisterOperand::Create(index, main_zone());
-      case 4:
-        return DoubleRegisterOperand::Create(index, main_zone());
-    }
-    UNREACHABLE();
-    return NULL;
-  }
-
- private:
-  v8::base::RandomNumberGenerator* rng_;
-};
-
-
-TEST(FuzzResolver) {
-  ParallelMoveCreator pmc;
-  for (int size = 0; size < 20; ++size) {
-    for (int repeat = 0; repeat < 50; ++repeat) {
-      ParallelMove* pm = pmc.Create(size);
-
-      // Note: The gap resolver modifies the ParallelMove, so interpret first.
-      MoveInterpreter mi1;
-      mi1.AssembleParallelMove(pm);
-
-      MoveInterpreter mi2;
-      GapResolver resolver(&mi2);
-      resolver.Resolve(pm);
-
-      CHECK(mi1.state() == mi2.state());
-    }
-  }
-}