Fix invalid use of int in Zone.

Review URL: https://codereview.chromium.org/924453002

Cr-Commit-Position: refs/heads/master@{#26609}

src/ast.h

@@ -200,9 +200,7 @@ class AstNode: public ZoneObject {
   };
 #undef DECLARE_TYPE_ENUM
 
-  void* operator new(size_t size, Zone* zone) {
-    return zone->New(static_cast<int>(size));
-  }
+  void* operator new(size_t size, Zone* zone) { return zone->New(size); }
 
   explicit AstNode(int position): position_(position) {}
   virtual ~AstNode() {}

src/compiler.cc

@@ -1565,7 +1565,7 @@ CompilationPhase::CompilationPhase(const char* name, CompilationInfo* info)
 
 CompilationPhase::~CompilationPhase() {
   if (FLAG_hydrogen_stats) {
-    unsigned size = zone()->allocation_size();
+    size_t size = zone()->allocation_size();
     size += info_->zone()->allocation_size() - info_zone_start_allocation_size_;
     isolate()->GetHStatistics()->SaveTiming(name_, timer_.Elapsed(), size);
   }

src/compiler.h

@@ -773,7 +773,7 @@ class CompilationPhase BASE_EMBEDDED {
   const char* name_;
   CompilationInfo* info_;
   Zone zone_;
-  unsigned info_zone_start_allocation_size_;
+  size_t info_zone_start_allocation_size_;
   base::ElapsedTimer timer_;
 
   DISALLOW_COPY_AND_ASSIGN(CompilationPhase);

src/compiler/instruction-selector.cc

@@ -1064,7 +1064,7 @@ void InstructionSelector::VisitSwitch(Node* node, BasicBlock** branches,
   Node* const value = node->InputAt(0);
   size_t const input_count = branch_count + 1;
   InstructionOperand* const inputs =
-      zone()->NewArray<InstructionOperand>(static_cast<int>(input_count));
+      zone()->NewArray<InstructionOperand>(input_count);
   inputs[0] = g.UseRegister(value);
   for (size_t index = 0; index < branch_count; ++index) {
     inputs[index + 1] = g.Label(branches[index]);

src/compiler/node-cache.cc

@@ -36,7 +36,7 @@ bool NodeCache<Key, Hash, Pred>::Resize(Zone* zone) {
   size_t old_size = size_ + kLinearProbe;
   size_ *= 4;
   size_t num_entries = size_ + kLinearProbe;
-  entries_ = zone->NewArray<Entry>(static_cast<int>(num_entries));
+  entries_ = zone->NewArray<Entry>(num_entries);
   memset(entries_, 0, sizeof(Entry) * num_entries);
 
   // Insert the old entries into the new block.
@@ -66,7 +66,7 @@ Node** NodeCache<Key, Hash, Pred>::Find(Zone* zone, Key key) {
   if (!entries_) {
     // Allocate the initial entries and insert the first entry.
     size_t num_entries = kInitialSize + kLinearProbe;
-    entries_ = zone->NewArray<Entry>(static_cast<int>(num_entries));
+    entries_ = zone->NewArray<Entry>(num_entries);
     size_ = kInitialSize;
     memset(entries_, 0, sizeof(Entry) * num_entries);
     Entry* entry = &entries_[hash & (kInitialSize - 1)];

src/compiler/raw-machine-assembler.cc

@@ -80,8 +80,7 @@ void RawMachineAssembler::Switch(Node* index, Label** succ_labels,
                                  size_t succ_count) {
   DCHECK_NE(schedule()->end(), current_block_);
   Node* sw = NewNode(common()->Switch(succ_count), index);
-  BasicBlock** succ_blocks =
-      zone()->NewArray<BasicBlock*>(static_cast<int>(succ_count));
+  BasicBlock** succ_blocks = zone()->NewArray<BasicBlock*>(succ_count);
   for (size_t index = 0; index < succ_count; ++index) {
     succ_blocks[index] = Use(succ_labels[index]);
   }

src/compiler/register-allocator-verifier.cc

@@ -61,8 +61,7 @@ RegisterAllocatorVerifier::RegisterAllocatorVerifier(
   // kSameAsFirst along the way.
   for (const auto* instr : sequence->instructions()) {
     const size_t operand_count = OperandCount(instr);
-    auto* op_constraints =
-        zone->NewArray<OperandConstraint>(static_cast<int>(operand_count));
+    auto* op_constraints = zone->NewArray<OperandConstraint>(operand_count);
     size_t count = 0;
     for (size_t i = 0; i < instr->InputCount(); ++i, ++count) {
       BuildConstraint(instr->InputAt(i), &op_constraints[count]);

src/compiler/register-allocator.cc

@@ -1514,7 +1514,7 @@ class LiveRangeBoundArray {
   void Initialize(Zone* zone, const LiveRange* const range) {
     size_t length = 0;
     for (auto i = range; i != nullptr; i = i->next()) length++;
-    start_ = zone->NewArray<LiveRangeBound>(static_cast<int>(length));
+    start_ = zone->NewArray<LiveRangeBound>(length);
     length_ = length;
     auto curr = start_;
     for (auto i = range; i != nullptr; i = i->next(), ++curr) {

src/compiler/scheduler.cc

@@ -365,8 +365,7 @@ class CFGBuilder : public ZoneObject {
 
   void BuildBlocksForSuccessors(Node* node) {
     size_t const successor_count = node->op()->ControlOutputCount();
-    Node** successors =
-        zone_->NewArray<Node*>(static_cast<int>(successor_count));
+    Node** successors = zone_->NewArray<Node*>(successor_count);
     CollectSuccessorProjections(node, successors, successor_count);
     for (size_t index = 0; index < successor_count; ++index) {
       BuildBlockForNode(successors[index]);
@@ -457,7 +456,7 @@ class CFGBuilder : public ZoneObject {
   void ConnectSwitch(Node* sw) {
     size_t const successor_count = sw->op()->ControlOutputCount();
     BasicBlock** successor_blocks =
-        zone_->NewArray<BasicBlock*>(static_cast<int>(successor_count));
+        zone_->NewArray<BasicBlock*>(successor_count);
     CollectSuccessorBlocks(sw, successor_blocks, successor_count);
 
     if (sw == component_entry_) {

src/compiler/value-numbering-reducer.cc

@@ -135,7 +135,7 @@ void ValueNumberingReducer::Grow() {
   Node** const old_entries = entries_;
   size_t const old_capacity = capacity_;
   capacity_ *= kCapacityToSizeRatio;
-  entries_ = zone()->NewArray<Node*>(static_cast<int>(capacity_));
+  entries_ = zone()->NewArray<Node*>(capacity_);
   memset(entries_, 0, sizeof(*entries_) * capacity_);
   size_ = 0;
   size_t const mask = capacity_ - 1;

src/compiler/x64/code-generator-x64.cc

@@ -1073,7 +1073,7 @@ void CodeGenerator::AssembleArchJump(BasicBlock::RpoNumber target) {
 void CodeGenerator::AssembleArchSwitch(Instruction* instr) {
   X64OperandConverter i(this, instr);
   size_t const label_count = instr->InputCount() - 1;
-  Label** labels = zone()->NewArray<Label*>(static_cast<int>(label_count));
+  Label** labels = zone()->NewArray<Label*>(label_count);
   for (size_t index = 0; index < label_count; ++index) {
     labels[index] = GetLabel(i.InputRpo(static_cast<int>(index + 1)));
   }

src/hydrogen.cc

@@ -13452,9 +13452,9 @@ void HStatistics::Print() {
     double percent = times_[i].PercentOf(sum);
     PrintF(" %8.3f ms / %4.1f %% ", ms, percent);
 
-    unsigned size = sizes_[i];
+    size_t size = sizes_[i];
     double size_percent = static_cast<double>(size) * 100 / total_size_;
-    PrintF(" %9u bytes / %4.1f %%\n", size, size_percent);
+    PrintF(" %9zu bytes / %4.1f %%\n", size, size_percent);
   }
 
   PrintF(
@@ -13470,7 +13470,7 @@ void HStatistics::Print() {
   PrintF(
       "----------------------------------------"
       "----------------------------------------\n");
-  PrintF("%33s %8.3f ms           %9u bytes\n", "Total",
+  PrintF("%33s %8.3f ms           %9zu bytes\n", "Total",
          total.InMillisecondsF(), total_size_);
   PrintF("%33s     (%.1f times slower than full code gen)\n", "",
          total.TimesOf(full_code_gen_));
@@ -13489,7 +13489,7 @@ void HStatistics::Print() {
 
 
 void HStatistics::SaveTiming(const char* name, base::TimeDelta time,
-                             unsigned size) {
+                             size_t size) {
   total_size_ += size;
   for (int i = 0; i < names_.length(); ++i) {
     if (strcmp(names_[i], name) == 0) {

src/hydrogen.h

@@ -2134,9 +2134,7 @@ class HOptimizedGraphBuilder : public HGraphBuilder, public AstVisitor {
 
   void VisitDeclarations(ZoneList<Declaration*>* declarations) OVERRIDE;
 
-  void* operator new(size_t size, Zone* zone) {
-    return zone->New(static_cast<int>(size));
-  }
+  void* operator new(size_t size, Zone* zone) { return zone->New(size); }
   void operator delete(void* pointer, Zone* zone) { }
   void operator delete(void* pointer) { }
 
@@ -2800,7 +2798,7 @@ class HStatistics FINAL: public Malloced {
 
   void Initialize(CompilationInfo* info);
   void Print();
-  void SaveTiming(const char* name, base::TimeDelta time, unsigned size);
+  void SaveTiming(const char* name, base::TimeDelta time, size_t size);
 
   void IncrementFullCodeGen(base::TimeDelta full_code_gen) {
     full_code_gen_ += full_code_gen;
@@ -2825,11 +2823,11 @@ class HStatistics FINAL: public Malloced {
  private:
   List<base::TimeDelta> times_;
   List<const char*> names_;
-  List<unsigned> sizes_;
+  List<size_t> sizes_;
   base::TimeDelta create_graph_;
   base::TimeDelta optimize_graph_;
   base::TimeDelta generate_code_;
-  unsigned total_size_;
+  size_t total_size_;
   base::TimeDelta full_code_gen_;
   double source_size_;
 };

src/lithium-allocator.cc

@@ -2174,7 +2174,7 @@ LAllocatorPhase::LAllocatorPhase(const char* name, LAllocator* allocator)
 
 LAllocatorPhase::~LAllocatorPhase() {
   if (FLAG_hydrogen_stats) {
-    unsigned size = allocator_->zone()->allocation_size() -
+    size_t size = allocator_->zone()->allocation_size() -
                   allocator_zone_start_allocation_size_;
     isolate()->GetHStatistics()->SaveTiming(name(), base::TimeDelta(), size);
   }

src/lithium-allocator.h

@@ -564,7 +564,7 @@ class LAllocatorPhase : public CompilationPhase {
 
  private:
   LAllocator* allocator_;
-  unsigned allocator_zone_start_allocation_size_;
+  size_t allocator_zone_start_allocation_size_;
 
   DISALLOW_COPY_AND_ASSIGN(LAllocatorPhase);
 };

src/typing.h

@@ -23,9 +23,7 @@ class AstTyper: public AstVisitor {
  public:
   static void Run(CompilationInfo* info);
 
-  void* operator new(size_t size, Zone* zone) {
-    return zone->New(static_cast<int>(size));
-  }
+  void* operator new(size_t size, Zone* zone) { return zone->New(size); }
   void operator delete(void* pointer, Zone* zone) { }
   void operator delete(void* pointer) { }
 

src/zone.cc

@@ -19,7 +19,7 @@ namespace {
 
 #if V8_USE_ADDRESS_SANITIZER
 
-const int kASanRedzoneBytes = 24;  // Must be a multiple of 8.
+const size_t kASanRedzoneBytes = 24;  // Must be a multiple of 8.
 
 #else
 
@@ -35,7 +35,7 @@ const int kASanRedzoneBytes = 24;  // Must be a multiple of 8.
     USE(size);                                   \
   } while (false)
 
-const int kASanRedzoneBytes = 0;
+const size_t kASanRedzoneBytes = 0;
 
 #endif  // V8_USE_ADDRESS_SANITIZER
 
@@ -50,7 +50,7 @@ const int kASanRedzoneBytes = 0;
 
 class Segment {
  public:
-  void Initialize(Segment* next, int size) {
+  void Initialize(Segment* next, size_t size) {
     next_ = next;
     size_ = size;
   }
@@ -58,20 +58,18 @@ class Segment {
   Segment* next() const { return next_; }
   void clear_next() { next_ = nullptr; }
 
-  int size() const { return size_; }
-  int capacity() const { return size_ - sizeof(Segment); }
+  size_t size() const { return size_; }
+  size_t capacity() const { return size_ - sizeof(Segment); }
 
   Address start() const { return address(sizeof(Segment)); }
   Address end() const { return address(size_); }
 
  private:
   // Computes the address of the nth byte in this segment.
-  Address address(int n) const {
-    return Address(this) + n;
-  }
+  Address address(size_t n) const { return Address(this) + n; }
 
   Segment* next_;
-  int size_;
+  size_t size_;
 };
 
 
@@ -91,7 +89,7 @@ Zone::~Zone() {
 }
 
 
-void* Zone::New(int size) {
+void* Zone::New(size_t size) {
   // Round up the requested size to fit the alignment.
   size = RoundUp(size, kAlignment);
 
@@ -106,8 +104,8 @@ void* Zone::New(int size) {
   // Check if the requested size is available without expanding.
   Address result = position_;
 
-  const int size_with_redzone = size + kASanRedzoneBytes;
-  if (size_with_redzone > limit_ - position_) {
+  const size_t size_with_redzone = size + kASanRedzoneBytes;
+  if (limit_ < position_ + size_with_redzone) {
     result = NewExpand(size_with_redzone);
   } else {
     position_ += size_with_redzone;
@@ -141,7 +139,7 @@ void Zone::DeleteAll() {
       keep = current;
       keep->clear_next();
     } else {
-      int size = current->size();
+      size_t size = current->size();
 #ifdef DEBUG
       // Un-poison first so the zapping doesn't trigger ASan complaints.
       ASAN_UNPOISON_MEMORY_REGION(current, size);
@@ -185,7 +183,7 @@ void Zone::DeleteKeptSegment() {
 
   DCHECK(segment_head_ == nullptr || segment_head_->next() == nullptr);
   if (segment_head_ != nullptr) {
-    int size = segment_head_->size();
+    size_t size = segment_head_->size();
 #ifdef DEBUG
     // Un-poison first so the zapping doesn't trigger ASan complaints.
     ASAN_UNPOISON_MEMORY_REGION(segment_head_, size);
@@ -202,7 +200,7 @@ void Zone::DeleteKeptSegment() {
 
 // Creates a new segment, sets it size, and pushes it to the front
 // of the segment chain. Returns the new segment.
-Segment* Zone::NewSegment(int size) {
+Segment* Zone::NewSegment(size_t size) {
   Segment* result = reinterpret_cast<Segment*>(Malloced::New(size));
   segment_bytes_allocated_ += size;
   if (result != nullptr) {
@@ -214,17 +212,17 @@ Segment* Zone::NewSegment(int size) {
 
 
 // Deletes the given segment. Does not touch the segment chain.
-void Zone::DeleteSegment(Segment* segment, int size) {
+void Zone::DeleteSegment(Segment* segment, size_t size) {
   segment_bytes_allocated_ -= size;
   Malloced::Delete(segment);
 }
 
 
-Address Zone::NewExpand(int size) {
+Address Zone::NewExpand(size_t size) {
   // Make sure the requested size is already properly aligned and that
   // there isn't enough room in the Zone to satisfy the request.
-  DCHECK(size == RoundDown(size, kAlignment));
-  DCHECK(size > limit_ - position_);
+  DCHECK_EQ(size, RoundDown(size, kAlignment));
+  DCHECK_LT(limit_, position_ + size);
 
   // Compute the new segment size. We use a 'high water mark'
   // strategy, where we increase the segment size every time we expand
@@ -235,27 +233,26 @@ Address Zone::NewExpand(int size) {
   static const size_t kSegmentOverhead = sizeof(Segment) + kAlignment;
   const size_t new_size_no_overhead = size + (old_size << 1);
   size_t new_size = kSegmentOverhead + new_size_no_overhead;
-  const size_t min_new_size = kSegmentOverhead + static_cast<size_t>(size);
+  const size_t min_new_size = kSegmentOverhead + size;
   // Guard against integer overflow.
-  if (new_size_no_overhead < static_cast<size_t>(size) ||
-      new_size < static_cast<size_t>(kSegmentOverhead)) {
+  if (new_size_no_overhead < size || new_size < kSegmentOverhead) {
     V8::FatalProcessOutOfMemory("Zone");
     return nullptr;
   }
-  if (new_size < static_cast<size_t>(kMinimumSegmentSize)) {
+  if (new_size < kMinimumSegmentSize) {
     new_size = kMinimumSegmentSize;
-  } else if (new_size > static_cast<size_t>(kMaximumSegmentSize)) {
+  } else if (new_size > kMaximumSegmentSize) {
     // Limit the size of new segments to avoid growing the segment size
     // exponentially, thus putting pressure on contiguous virtual address space.
     // All the while making sure to allocate a segment large enough to hold the
     // requested size.
-    new_size = Max(min_new_size, static_cast<size_t>(kMaximumSegmentSize));
+    new_size = Max(min_new_size, kMaximumSegmentSize);
   }
   if (new_size > INT_MAX) {
     V8::FatalProcessOutOfMemory("Zone");
     return nullptr;
   }
-  Segment* segment = NewSegment(static_cast<int>(new_size));
+  Segment* segment = NewSegment(new_size);
   if (segment == nullptr) {
     V8::FatalProcessOutOfMemory("Zone");
     return nullptr;

src/zone.h

@@ -40,12 +40,11 @@ class Zone FINAL {
 
   // Allocate 'size' bytes of memory in the Zone; expands the Zone by
   // allocating new segments of memory on demand using malloc().
-  void* New(int size);
+  void* New(size_t size);
 
   template <typename T>
-  T* NewArray(int length) {
-    DCHECK(std::numeric_limits<int>::max() / static_cast<int>(sizeof(T)) >
-           length);
+  T* NewArray(size_t length) {
+    DCHECK_LT(length, std::numeric_limits<size_t>::max() / sizeof(T));
     return static_cast<T*>(New(length * sizeof(T)));
   }
 
@@ -63,51 +62,51 @@ class Zone FINAL {
     return segment_bytes_allocated_ > kExcessLimit;
   }
 
-  unsigned allocation_size() const { return allocation_size_; }
+  size_t allocation_size() const { return allocation_size_; }
 
  private:
   // All pointers returned from New() have this alignment.  In addition, if the
   // object being allocated has a size that is divisible by 8 then its alignment
   // will be 8. ASan requires 8-byte alignment.
 #ifdef V8_USE_ADDRESS_SANITIZER
-  static const int kAlignment = 8;
+  static const size_t kAlignment = 8;
   STATIC_ASSERT(kPointerSize <= 8);
 #else
-  static const int kAlignment = kPointerSize;
+  static const size_t kAlignment = kPointerSize;
 #endif
 
   // Never allocate segments smaller than this size in bytes.
-  static const int kMinimumSegmentSize = 8 * KB;
+  static const size_t kMinimumSegmentSize = 8 * KB;
 
   // Never allocate segments larger than this size in bytes.
-  static const int kMaximumSegmentSize = 1 * MB;
+  static const size_t kMaximumSegmentSize = 1 * MB;
 
   // Never keep segments larger than this size in bytes around.
-  static const int kMaximumKeptSegmentSize = 64 * KB;
+  static const size_t kMaximumKeptSegmentSize = 64 * KB;
 
   // Report zone excess when allocation exceeds this limit.
-  static const int kExcessLimit = 256 * MB;
+  static const size_t kExcessLimit = 256 * MB;
 
   // The number of bytes allocated in this zone so far.
-  unsigned allocation_size_;
+  size_t allocation_size_;
 
   // The number of bytes allocated in segments.  Note that this number
   // includes memory allocated from the OS but not yet allocated from
   // the zone.
-  int segment_bytes_allocated_;
+  size_t segment_bytes_allocated_;
 
   // Expand the Zone to hold at least 'size' more bytes and allocate
   // the bytes. Returns the address of the newly allocated chunk of
   // memory in the Zone. Should only be called if there isn't enough
   // room in the Zone already.
-  Address NewExpand(int size);
+  Address NewExpand(size_t size);
 
   // Creates a new segment, sets it size, and pushes it to the front
   // of the segment chain. Returns the new segment.
-  inline Segment* NewSegment(int size);
+  inline Segment* NewSegment(size_t size);
 
   // Deletes the given segment. Does not touch the segment chain.
-  inline void DeleteSegment(Segment* segment, int size);
+  inline void DeleteSegment(Segment* segment, size_t size);
 
   // The free region in the current (front) segment is represented as
   // the half-open interval [position, limit). The 'position' variable
@@ -124,9 +123,7 @@ class Zone FINAL {
 class ZoneObject {
  public:
   // Allocate a new ZoneObject of 'size' bytes in the Zone.
-  void* operator new(size_t size, Zone* zone) {
-    return zone->New(static_cast<int>(size));
-  }
+  void* operator new(size_t size, Zone* zone) { return zone->New(size); }
 
   // Ideally, the delete operator should be private instead of
   // public, but unfortunately the compiler sometimes synthesizes
@@ -160,7 +157,7 @@ class ZoneScope FINAL {
 class ZoneAllocationPolicy FINAL {
  public:
   explicit ZoneAllocationPolicy(Zone* zone) : zone_(zone) { }
-  void* New(size_t size) { return zone()->New(static_cast<int>(size)); }
+  void* New(size_t size) { return zone()->New(size); }
   static void Delete(void* pointer) {}
   Zone* zone() const { return zone_; }
 
@@ -181,9 +178,7 @@ class ZoneList FINAL : public List<T, ZoneAllocationPolicy> {
   ZoneList(int capacity, Zone* zone)
       : List<T, ZoneAllocationPolicy>(capacity, ZoneAllocationPolicy(zone)) { }
 
-  void* operator new(size_t size, Zone* zone) {
-    return zone->New(static_cast<int>(size));
-  }
+  void* operator new(size_t size, Zone* zone) { return zone->New(size); }
 
   // Construct a new ZoneList by copying the elements of the given ZoneList.
   ZoneList(const ZoneList<T>& other, Zone* zone)
@@ -239,9 +234,7 @@ class ZoneSplayTree FINAL : public SplayTree<Config, ZoneAllocationPolicy> {
     SplayTree<Config, ZoneAllocationPolicy>::ResetRoot();
   }
 
-  void* operator new(size_t size, Zone* zone) {
-    return zone->New(static_cast<int>(size));
-  }
+  void* operator new(size_t size, Zone* zone) { return zone->New(size); }
 
   void operator delete(void* pointer) { UNREACHABLE(); }
   void operator delete(void* pointer, Zone* zone) { UNREACHABLE(); }

test/unittests/compiler/zone-pool-unittest.cc

@@ -32,9 +32,9 @@ class ZonePoolTest : public TestWithIsolate {
 
   size_t Allocate(Zone* zone) {
     size_t bytes = rng.NextInt(25) + 7;
-    int size_before = zone->allocation_size();
-    zone->New(static_cast<int>(bytes));
-    return static_cast<size_t>(zone->allocation_size() - size_before);
+    size_t size_before = zone->allocation_size();
+    zone->New(bytes);
+    return zone->allocation_size() - size_before;
   }
 
  private: