Forking the type system between Crankshaft & Turbofan.

src/ast/ast-types.cc

Index: src/ast/ast-types.cc
diff --git a/src/types.cc b/src/ast/ast-types.cc
similarity index 70%
copy from src/types.cc
copy to src/ast/ast-types.cc
index fae460757c73ee60d3e3af9db7ebbdb0a0e23406..aa861af035c3ce8521430ba07a7b60aabc4237b4 100644
--- a/src/types.cc
+++ b/src/ast/ast-types.cc
@@ -4,7 +4,7 @@
 
 #include <iomanip>
 
-#include "src/types.h"
+#include "src/ast/ast-types.h"
 
 #include "src/handles-inl.h"
 #include "src/ostreams.h"
@@ -12,21 +12,20 @@
 namespace v8 {
 namespace internal {
 
-
 // NOTE: If code is marked as being a "shortcut", this means that removing
 // the code won't affect the semantics of the surrounding function definition.
 
 // static
-bool Type::IsInteger(i::Object* x) {
-  return x->IsNumber() && Type::IsInteger(x->Number());
+bool AstType::IsInteger(i::Object* x) {
+  return x->IsNumber() && AstType::IsInteger(x->Number());
 }
 
 // -----------------------------------------------------------------------------
 // Range-related helper functions.
 
-bool RangeType::Limits::IsEmpty() { return this->min > this->max; }
+bool AstRangeType::Limits::IsEmpty() { return this->min > this->max; }
 
-RangeType::Limits RangeType::Limits::Intersect(Limits lhs, Limits rhs) {
+AstRangeType::Limits AstRangeType::Limits::Intersect(Limits lhs, Limits rhs) {
   DisallowHeapAllocation no_allocation;
   Limits result(lhs);
   if (lhs.min < rhs.min) result.min = rhs.min;
@@ -34,7 +33,7 @@ RangeType::Limits RangeType::Limits::Intersect(Limits lhs, Limits rhs) {
   return result;
 }
 
-RangeType::Limits RangeType::Limits::Union(Limits lhs, Limits rhs) {
+AstRangeType::Limits AstRangeType::Limits::Union(Limits lhs, Limits rhs) {
   DisallowHeapAllocation no_allocation;
   if (lhs.IsEmpty()) return rhs;
   if (rhs.IsEmpty()) return lhs;
@@ -44,38 +43,36 @@ RangeType::Limits RangeType::Limits::Union(Limits lhs, Limits rhs) {
   return result;
 }
 
-bool Type::Overlap(RangeType* lhs, RangeType* rhs) {
+bool AstType::Overlap(AstRangeType* lhs, AstRangeType* rhs) {
   DisallowHeapAllocation no_allocation;
-  return !RangeType::Limits::Intersect(RangeType::Limits(lhs),
-                                       RangeType::Limits(rhs))
+  return !AstRangeType::Limits::Intersect(AstRangeType::Limits(lhs),
+                                          AstRangeType::Limits(rhs))
               .IsEmpty();
 }
 
-bool Type::Contains(RangeType* lhs, RangeType* rhs) {
+bool AstType::Contains(AstRangeType* lhs, AstRangeType* rhs) {
   DisallowHeapAllocation no_allocation;
   return lhs->Min() <= rhs->Min() && rhs->Max() <= lhs->Max();
 }
 
-bool Type::Contains(RangeType* lhs, ConstantType* rhs) {
+bool AstType::Contains(AstRangeType* lhs, AstConstantType* rhs) {
   DisallowHeapAllocation no_allocation;
-  return IsInteger(*rhs->Value()) &&
-         lhs->Min() <= rhs->Value()->Number() &&
+  return IsInteger(*rhs->Value()) && lhs->Min() <= rhs->Value()->Number() &&
          rhs->Value()->Number() <= lhs->Max();
 }
 
-bool Type::Contains(RangeType* range, i::Object* val) {
+bool AstType::Contains(AstRangeType* range, i::Object* val) {
   DisallowHeapAllocation no_allocation;
-  return IsInteger(val) &&
-         range->Min() <= val->Number() && val->Number() <= range->Max();
+  return IsInteger(val) && range->Min() <= val->Number() &&
+         val->Number() <= range->Max();
 }
 
-
 // -----------------------------------------------------------------------------
 // Min and Max computation.
 
-double Type::Min() {
+double AstType::Min() {
   DCHECK(this->SemanticIs(Number()));
-  if (this->IsBitset()) return BitsetType::Min(this->AsBitset());
+  if (this->IsBitset()) return AstBitsetType::Min(this->AsBitset());
   if (this->IsUnion()) {
     double min = +V8_INFINITY;
     for (int i = 0, n = this->AsUnion()->Length(); i < n; ++i) {
@@ -89,9 +86,9 @@ double Type::Min() {
   return 0;
 }
 
-double Type::Max() {
+double AstType::Max() {
   DCHECK(this->SemanticIs(Number()));
-  if (this->IsBitset()) return BitsetType::Max(this->AsBitset());
+  if (this->IsBitset()) return AstBitsetType::Max(this->AsBitset());
   if (this->IsUnion()) {
     double max = -V8_INFINITY;
     for (int i = 0, n = this->AsUnion()->Length(); i < n; ++i) {
@@ -105,13 +102,11 @@ double Type::Max() {
   return 0;
 }
 
-
 // -----------------------------------------------------------------------------
 // Glb and lub computation.
 
-
 // The largest bitset subsumed by this type.
-Type::bitset BitsetType::Glb(Type* type) {
+AstType::bitset AstBitsetType::Glb(AstType* type) {
   DisallowHeapAllocation no_allocation;
   // Fast case.
   if (IsBitset(type)) {
@@ -119,19 +114,18 @@ Type::bitset BitsetType::Glb(Type* type) {
   } else if (type->IsUnion()) {
     SLOW_DCHECK(type->AsUnion()->Wellformed());
     return type->AsUnion()->Get(0)->BitsetGlb() |
-           SEMANTIC(type->AsUnion()->Get(1)->BitsetGlb());  // Shortcut.
+           AST_SEMANTIC(type->AsUnion()->Get(1)->BitsetGlb());  // Shortcut.
   } else if (type->IsRange()) {
-    bitset glb = SEMANTIC(
-        BitsetType::Glb(type->AsRange()->Min(), type->AsRange()->Max()));
-    return glb | REPRESENTATION(type->BitsetLub());
+    bitset glb = AST_SEMANTIC(
+        AstBitsetType::Glb(type->AsRange()->Min(), type->AsRange()->Max()));
+    return glb | AST_REPRESENTATION(type->BitsetLub());
   } else {
     return type->Representation();
   }
 }
 
-
 // The smallest bitset subsuming this type, possibly not a proper one.
-Type::bitset BitsetType::Lub(Type* type) {
+AstType::bitset AstBitsetType::Lub(AstType* type) {
   DisallowHeapAllocation no_allocation;
   if (IsBitset(type)) return type->AsBitset();
   if (type->IsUnion()) {
@@ -140,7 +134,7 @@ Type::bitset BitsetType::Lub(Type* type) {
     int bitset = type->AsUnion()->Get(0)->BitsetLub();
     for (int i = 0, n = type->AsUnion()->Length(); i < n; ++i) {
       // Other elements only contribute their semantic part.
-      bitset |= SEMANTIC(type->AsUnion()->Get(i)->BitsetLub());
+      bitset |= AST_SEMANTIC(type->AsUnion()->Get(i)->BitsetLub());
     }
     return bitset;
   }
@@ -155,7 +149,7 @@ Type::bitset BitsetType::Lub(Type* type) {
   return kNone;
 }
 
-Type::bitset BitsetType::Lub(i::Map* map) {
+AstType::bitset AstBitsetType::Lub(i::Map* map) {
   DisallowHeapAllocation no_allocation;
   switch (map->instance_type()) {
     case STRING_TYPE:
@@ -286,16 +280,16 @@ Type::bitset BitsetType::Lub(i::Map* map) {
   return kNone;
 }
 
-Type::bitset BitsetType::Lub(i::Object* value) {
+AstType::bitset AstBitsetType::Lub(i::Object* value) {
   DisallowHeapAllocation no_allocation;
   if (value->IsNumber()) {
     return Lub(value->Number()) &
-        (value->IsSmi() ? kTaggedSigned : kTaggedPointer);
+           (value->IsSmi() ? kTaggedSigned : kTaggedPointer);
   }
   return Lub(i::HeapObject::cast(value)->map());
 }
 
-Type::bitset BitsetType::Lub(double value) {
+AstType::bitset AstBitsetType::Lub(double value) {
   DisallowHeapAllocation no_allocation;
   if (i::IsMinusZero(value)) return kMinusZero;
   if (std::isnan(value)) return kNaN;
@@ -303,9 +297,8 @@ Type::bitset BitsetType::Lub(double value) {
   return kOtherNumber;
 }
 
-
 // Minimum values of plain numeric bitsets.
-const BitsetType::Boundary BitsetType::BoundariesArray[] = {
+const AstBitsetType::Boundary AstBitsetType::BoundariesArray[] = {
     {kOtherNumber, kPlainNumber, -V8_INFINITY},
     {kOtherSigned32, kNegative32, kMinInt},
     {kNegative31, kNegative31, -0x40000000},
@@ -314,45 +307,47 @@ const BitsetType::Boundary BitsetType::BoundariesArray[] = {
     {kOtherUnsigned32, kUnsigned32, 0x80000000},
     {kOtherNumber, kPlainNumber, static_cast<double>(kMaxUInt32) + 1}};
 
-const BitsetType::Boundary* BitsetType::Boundaries() { return BoundariesArray; }
+const AstBitsetType::Boundary* AstBitsetType::Boundaries() {
+  return BoundariesArray;
+}
 
-size_t BitsetType::BoundariesSize() {
+size_t AstBitsetType::BoundariesSize() {
   // Windows doesn't like arraysize here.
   // return arraysize(BoundariesArray);
   return 7;
 }
 
-Type::bitset BitsetType::ExpandInternals(Type::bitset bits) {
+AstType::bitset AstBitsetType::ExpandInternals(AstType::bitset bits) {
   DisallowHeapAllocation no_allocation;
-  if (!(bits & SEMANTIC(kPlainNumber))) return bits;  // Shortcut.
+  if (!(bits & AST_SEMANTIC(kPlainNumber))) return bits;  // Shortcut.
   const Boundary* boundaries = Boundaries();
   for (size_t i = 0; i < BoundariesSize(); ++i) {
-    DCHECK(BitsetType::Is(boundaries[i].internal, boundaries[i].external));
-    if (bits & SEMANTIC(boundaries[i].internal))
-      bits |= SEMANTIC(boundaries[i].external);
+    DCHECK(AstBitsetType::Is(boundaries[i].internal, boundaries[i].external));
+    if (bits & AST_SEMANTIC(boundaries[i].internal))
+      bits |= AST_SEMANTIC(boundaries[i].external);
   }
   return bits;
 }
 
-Type::bitset BitsetType::Lub(double min, double max) {
+AstType::bitset AstBitsetType::Lub(double min, double max) {
   DisallowHeapAllocation no_allocation;
   int lub = kNone;
   const Boundary* mins = Boundaries();
 
   for (size_t i = 1; i < BoundariesSize(); ++i) {
     if (min < mins[i].min) {
-      lub |= mins[i-1].internal;
+      lub |= mins[i - 1].internal;
       if (max < mins[i].min) return lub;
     }
   }
   return lub | mins[BoundariesSize() - 1].internal;
 }
 
-Type::bitset BitsetType::NumberBits(bitset bits) {
-  return SEMANTIC(bits & kPlainNumber);
+AstType::bitset AstBitsetType::NumberBits(bitset bits) {
+  return AST_SEMANTIC(bits & kPlainNumber);
 }
 
-Type::bitset BitsetType::Glb(double min, double max) {
+AstType::bitset AstBitsetType::Glb(double min, double max) {
   DisallowHeapAllocation no_allocation;
   int glb = kNone;
   const Boundary* mins = Boundaries();
@@ -368,16 +363,16 @@ Type::bitset BitsetType::Glb(double min, double max) {
   }
   // OtherNumber also contains float numbers, so it can never be
   // in the greatest lower bound.
-  return glb & ~(SEMANTIC(kOtherNumber));
+  return glb & ~(AST_SEMANTIC(kOtherNumber));
 }
 
-double BitsetType::Min(bitset bits) {
+double AstBitsetType::Min(bitset bits) {
   DisallowHeapAllocation no_allocation;
-  DCHECK(Is(SEMANTIC(bits), kNumber));
+  DCHECK(Is(AST_SEMANTIC(bits), kNumber));
   const Boundary* mins = Boundaries();
-  bool mz = SEMANTIC(bits & kMinusZero);
+  bool mz = AST_SEMANTIC(bits & kMinusZero);
   for (size_t i = 0; i < BoundariesSize(); ++i) {
-    if (Is(SEMANTIC(mins[i].internal), bits)) {
+    if (Is(AST_SEMANTIC(mins[i].internal), bits)) {
       return mz ? std::min(0.0, mins[i].min) : mins[i].min;
     }
   }
@@ -385,50 +380,49 @@ double BitsetType::Min(bitset bits) {
   return std::numeric_limits<double>::quiet_NaN();
 }
 
-double BitsetType::Max(bitset bits) {
+double AstBitsetType::Max(bitset bits) {
   DisallowHeapAllocation no_allocation;
-  DCHECK(Is(SEMANTIC(bits), kNumber));
+  DCHECK(Is(AST_SEMANTIC(bits), kNumber));
   const Boundary* mins = Boundaries();
-  bool mz = SEMANTIC(bits & kMinusZero);
-  if (BitsetType::Is(SEMANTIC(mins[BoundariesSize() - 1].internal), bits)) {
+  bool mz = AST_SEMANTIC(bits & kMinusZero);
+  if (AstBitsetType::Is(AST_SEMANTIC(mins[BoundariesSize() - 1].internal),
+                        bits)) {
     return +V8_INFINITY;
   }
   for (size_t i = BoundariesSize() - 1; i-- > 0;) {
-    if (Is(SEMANTIC(mins[i].internal), bits)) {
-      return mz ?
-          std::max(0.0, mins[i+1].min - 1) : mins[i+1].min - 1;
+    if (Is(AST_SEMANTIC(mins[i].internal), bits)) {
+      return mz ? std::max(0.0, mins[i + 1].min - 1) : mins[i + 1].min - 1;
     }
   }
   if (mz) return 0;
   return std::numeric_limits<double>::quiet_NaN();
 }
 
-
 // -----------------------------------------------------------------------------
 // Predicates.
 
-bool Type::SimplyEquals(Type* that) {
+bool AstType::SimplyEquals(AstType* that) {
   DisallowHeapAllocation no_allocation;
   if (this->IsClass()) {
-    return that->IsClass()
-        && *this->AsClass()->Map() == *that->AsClass()->Map();
+    return that->IsClass() &&
+           *this->AsClass()->Map() == *that->AsClass()->Map();
   }
   if (this->IsConstant()) {
-    return that->IsConstant()
-        && *this->AsConstant()->Value() == *that->AsConstant()->Value();
+    return that->IsConstant() &&
+           *this->AsConstant()->Value() == *that->AsConstant()->Value();
   }
   if (this->IsContext()) {
-    return that->IsContext()
-        && this->AsContext()->Outer()->Equals(that->AsContext()->Outer());
+    return that->IsContext() &&
+           this->AsContext()->Outer()->Equals(that->AsContext()->Outer());
   }
   if (this->IsArray()) {
-    return that->IsArray()
-        && this->AsArray()->Element()->Equals(that->AsArray()->Element());
+    return that->IsArray() &&
+           this->AsArray()->Element()->Equals(that->AsArray()->Element());
   }
   if (this->IsFunction()) {
     if (!that->IsFunction()) return false;
-    FunctionType* this_fun = this->AsFunction();
-    FunctionType* that_fun = that->AsFunction();
+    AstFunctionType* this_fun = this->AsFunction();
+    AstFunctionType* that_fun = that->AsFunction();
     if (this_fun->Arity() != that_fun->Arity() ||
         !this_fun->Result()->Equals(that_fun->Result()) ||
         !this_fun->Receiver()->Equals(that_fun->Receiver())) {
@@ -441,8 +435,8 @@ bool Type::SimplyEquals(Type* that) {
   }
   if (this->IsTuple()) {
     if (!that->IsTuple()) return false;
-    TupleType* this_tuple = this->AsTuple();
-    TupleType* that_tuple = that->AsTuple();
+    AstTupleType* this_tuple = this->AsTuple();
+    AstTupleType* that_tuple = that->AsTuple();
     if (this_tuple->Arity() != that_tuple->Arity()) {
       return false;
     }
@@ -455,26 +449,25 @@ bool Type::SimplyEquals(Type* that) {
   return false;
 }
 
-Type::bitset Type::Representation() {
-  return REPRESENTATION(this->BitsetLub());
+AstType::bitset AstType::Representation() {
+  return AST_REPRESENTATION(this->BitsetLub());
 }
 
-
 // Check if [this] <= [that].
-bool Type::SlowIs(Type* that) {
+bool AstType::SlowIs(AstType* that) {
   DisallowHeapAllocation no_allocation;
 
   // Fast bitset cases
   if (that->IsBitset()) {
-    return BitsetType::Is(this->BitsetLub(), that->AsBitset());
+    return AstBitsetType::Is(this->BitsetLub(), that->AsBitset());
   }
 
   if (this->IsBitset()) {
-    return BitsetType::Is(this->AsBitset(), that->BitsetGlb());
+    return AstBitsetType::Is(this->AsBitset(), that->BitsetGlb());
   }
 
   // Check the representations.
-  if (!BitsetType::Is(Representation(), that->Representation())) {
+  if (!AstBitsetType::Is(Representation(), that->Representation())) {
     return false;
   }
 
@@ -482,19 +475,19 @@ bool Type::SlowIs(Type* that) {
   return SemanticIs(that);
 }
 
-
-// Check if SEMANTIC([this]) <= SEMANTIC([that]). The result of the method
+// Check if AST_SEMANTIC([this]) <= AST_SEMANTIC([that]). The result of the
+// method
 // should be independent of the representation axis of the types.
-bool Type::SemanticIs(Type* that) {
+bool AstType::SemanticIs(AstType* that) {
   DisallowHeapAllocation no_allocation;
 
   if (this == that) return true;
 
   if (that->IsBitset()) {
-    return BitsetType::Is(SEMANTIC(this->BitsetLub()), that->AsBitset());
+    return AstBitsetType::Is(AST_SEMANTIC(this->BitsetLub()), that->AsBitset());
   }
   if (this->IsBitset()) {
-    return BitsetType::Is(SEMANTIC(this->AsBitset()), that->BitsetGlb());
+    return AstBitsetType::Is(AST_SEMANTIC(this->AsBitset()), that->BitsetGlb());
   }
 
   // (T1 \/ ... \/ Tn) <= T  if  (T1 <= T) /\ ... /\ (Tn <= T)
@@ -525,7 +518,7 @@ bool Type::SemanticIs(Type* that) {
 }
 
 // Most precise _current_ type of a value (usually its class).
-Type* Type::NowOf(i::Object* value, Zone* zone) {
+AstType* AstType::NowOf(i::Object* value, Zone* zone) {
   if (value->IsSmi() ||
       i::HeapObject::cast(value)->map()->instance_type() == HEAP_NUMBER_TYPE) {
     return Of(value, zone);
@@ -533,7 +526,7 @@ Type* Type::NowOf(i::Object* value, Zone* zone) {
   return Class(i::handle(i::HeapObject::cast(value)->map()), zone);
 }
 
-bool Type::NowContains(i::Object* value) {
+bool AstType::NowContains(i::Object* value) {
   DisallowHeapAllocation no_allocation;
   if (this->IsAny()) return true;
   if (value->IsHeapObject()) {
@@ -545,7 +538,7 @@ bool Type::NowContains(i::Object* value) {
   return this->Contains(value);
 }
 
-bool Type::NowIs(Type* that) {
+bool AstType::NowIs(AstType* that) {
   DisallowHeapAllocation no_allocation;
 
   // TODO(rossberg): this is incorrect for
@@ -563,27 +556,25 @@ bool Type::NowIs(Type* that) {
   return this->Is(that);
 }
 
-
 // Check if [this] contains only (currently) stable classes.
-bool Type::NowStable() {
+bool AstType::NowStable() {
   DisallowHeapAllocation no_allocation;
   return !this->IsClass() || this->AsClass()->Map()->is_stable();
 }
 
-
 // Check if [this] and [that] overlap.
-bool Type::Maybe(Type* that) {
+bool AstType::Maybe(AstType* that) {
   DisallowHeapAllocation no_allocation;
 
   // Take care of the representation part (and also approximate
   // the semantic part).
-  if (!BitsetType::IsInhabited(this->BitsetLub() & that->BitsetLub()))
+  if (!AstBitsetType::IsInhabited(this->BitsetLub() & that->BitsetLub()))
     return false;
 
   return SemanticMaybe(that);
 }
 
-bool Type::SemanticMaybe(Type* that) {
+bool AstType::SemanticMaybe(AstType* that) {
   DisallowHeapAllocation no_allocation;
 
   // (T1 \/ ... \/ Tn) overlaps T  if  (T1 overlaps T) \/ ... \/ (Tn overlaps T)
@@ -602,7 +593,8 @@ bool Type::SemanticMaybe(Type* that) {
     return false;
   }
 
-  if (!BitsetType::SemanticIsInhabited(this->BitsetLub() & that->BitsetLub()))
+  if (!AstBitsetType::SemanticIsInhabited(this->BitsetLub() &
+                                          that->BitsetLub()))
     return false;
 
   if (this->IsBitset() && that->IsBitset()) return true;
@@ -617,12 +609,12 @@ bool Type::SemanticMaybe(Type* that) {
       return Overlap(this->AsRange(), that->AsRange());
     }
     if (that->IsBitset()) {
-      bitset number_bits = BitsetType::NumberBits(that->AsBitset());
-      if (number_bits == BitsetType::kNone) {
+      bitset number_bits = AstBitsetType::NumberBits(that->AsBitset());
+      if (number_bits == AstBitsetType::kNone) {
         return false;
       }
-      double min = std::max(BitsetType::Min(number_bits), this->Min());
-      double max = std::min(BitsetType::Max(number_bits), this->Max());
+      double min = std::max(AstBitsetType::Min(number_bits), this->Min());
+      double max = std::min(AstBitsetType::Max(number_bits), this->Max());
       return min <= max;
     }
   }
@@ -635,9 +627,8 @@ bool Type::SemanticMaybe(Type* that) {
   return this->SimplyEquals(that);
 }
 
-
 // Return the range in [this], or [NULL].
-Type* Type::GetRange() {
+AstType* AstType::GetRange() {
   DisallowHeapAllocation no_allocation;
   if (this->IsRange()) return this;
   if (this->IsUnion() && this->AsUnion()->Get(1)->IsRange()) {
@@ -646,19 +637,19 @@ Type* Type::GetRange() {
   return NULL;
 }
 
-bool Type::Contains(i::Object* value) {
+bool AstType::Contains(i::Object* value) {
   DisallowHeapAllocation no_allocation;
   for (Iterator<i::Object> it = this->Constants(); !it.Done(); it.Advance()) {
     if (*it.Current() == value) return true;
   }
   if (IsInteger(value)) {
-    Type* range = this->GetRange();
+    AstType* range = this->GetRange();
     if (range != NULL && Contains(range->AsRange(), value)) return true;
   }
-  return BitsetType::New(BitsetType::Lub(value))->Is(this);
+  return AstBitsetType::New(AstBitsetType::Lub(value))->Is(this);
 }
 
-bool UnionType::Wellformed() {
+bool AstUnionType::Wellformed() {
   DisallowHeapAllocation no_allocation;
   // This checks the invariants of the union representation:
   // 1. There are at least two elements.
@@ -668,7 +659,7 @@ bool UnionType::Wellformed() {
   // 5. No element (except the bitset) is a subtype of any other.
   // 6. If there is a range, then the bitset type does not contain
   //    plain number bits.
-  DCHECK(this->Length() >= 2);  // (1)
+  DCHECK(this->Length() >= 2);       // (1)
   DCHECK(this->Get(0)->IsBitset());  // (2a)
 
   for (int i = 0; i < this->Length(); ++i) {
@@ -681,26 +672,23 @@ bool UnionType::Wellformed() {
     }
   }
   DCHECK(!this->Get(1)->IsRange() ||
-         (BitsetType::NumberBits(this->Get(0)->AsBitset()) ==
-          BitsetType::kNone));  // (6)
+         (AstBitsetType::NumberBits(this->Get(0)->AsBitset()) ==
+          AstBitsetType::kNone));  // (6)
   return true;
 }
 
-
 // -----------------------------------------------------------------------------
 // Union and intersection
 
-
 static bool AddIsSafe(int x, int y) {
-  return x >= 0 ?
-      y <= std::numeric_limits<int>::max() - x :
-      y >= std::numeric_limits<int>::min() - x;
+  return x >= 0 ? y <= std::numeric_limits<int>::max() - x
+                : y >= std::numeric_limits<int>::min() - x;
 }
 
-Type* Type::Intersect(Type* type1, Type* type2, Zone* zone) {
+AstType* AstType::Intersect(AstType* type1, AstType* type2, Zone* zone) {
   // Fast case: bit sets.
   if (type1->IsBitset() && type2->IsBitset()) {
-    return BitsetType::New(type1->AsBitset() & type2->AsBitset());
+    return AstBitsetType::New(type1->AsBitset() & type2->AsBitset());
   }
 
   // Fast case: top or bottom types.
@@ -731,38 +719,39 @@ Type* Type::Intersect(Type* type1, Type* type2, Zone* zone) {
   }
 
   bitset bits =
-      SEMANTIC(type1->BitsetGlb() & type2->BitsetGlb()) | representation;
+      AST_SEMANTIC(type1->BitsetGlb() & type2->BitsetGlb()) | representation;
   int size1 = type1->IsUnion() ? type1->AsUnion()->Length() : 1;
   int size2 = type2->IsUnion() ? type2->AsUnion()->Length() : 1;
   if (!AddIsSafe(size1, size2)) return Any();
   int size = size1 + size2;
   if (!AddIsSafe(size, 2)) return Any();
   size += 2;
-  Type* result_type = UnionType::New(size, zone);
-  UnionType* result = result_type->AsUnion();
+  AstType* result_type = AstUnionType::New(size, zone);
+  AstUnionType* result = result_type->AsUnion();
   size = 0;
 
   // Deal with bitsets.
-  result->Set(size++, BitsetType::New(bits));
+  result->Set(size++, AstBitsetType::New(bits));
 
-  RangeType::Limits lims = RangeType::Limits::Empty();
+  AstRangeType::Limits lims = AstRangeType::Limits::Empty();
   size = IntersectAux(type1, type2, result, size, &lims, zone);
 
   // If the range is not empty, then insert it into the union and
   // remove the number bits from the bitset.
   if (!lims.IsEmpty()) {
-    size = UpdateRange(RangeType::New(lims, representation, zone), result, size,
-                       zone);
+    size = UpdateRange(AstRangeType::New(lims, representation, zone), result,
+                       size, zone);
 
     // Remove the number bits.
-    bitset number_bits = BitsetType::NumberBits(bits);
+    bitset number_bits = AstBitsetType::NumberBits(bits);
     bits &= ~number_bits;
-    result->Set(0, BitsetType::New(bits));
+    result->Set(0, AstBitsetType::New(bits));
   }
   return NormalizeUnion(result_type, size, zone);
 }
 
-int Type::UpdateRange(Type* range, UnionType* result, int size, Zone* zone) {
+int AstType::UpdateRange(AstType* range, AstUnionType* result, int size,
+                         Zone* zone) {
   if (size == 1) {
     result->Set(size++, range);
   } else {
@@ -772,7 +761,7 @@ int Type::UpdateRange(Type* range, UnionType* result, int size, Zone* zone) {
   }
 
   // Remove any components that just got subsumed.
-  for (int i = 2; i < size; ) {
+  for (int i = 2; i < size;) {
     if (result->Get(i)->SemanticIs(range)) {
       result->Set(i, result->Get(--size));
     } else {
@@ -782,26 +771,27 @@ int Type::UpdateRange(Type* range, UnionType* result, int size, Zone* zone) {
   return size;
 }
 
-RangeType::Limits Type::ToLimits(bitset bits, Zone* zone) {
-  bitset number_bits = BitsetType::NumberBits(bits);
+AstRangeType::Limits AstType::ToLimits(bitset bits, Zone* zone) {
+  bitset number_bits = AstBitsetType::NumberBits(bits);
 
-  if (number_bits == BitsetType::kNone) {
-    return RangeType::Limits::Empty();
+  if (number_bits == AstBitsetType::kNone) {
+    return AstRangeType::Limits::Empty();
   }
 
-  return RangeType::Limits(BitsetType::Min(number_bits),
-                           BitsetType::Max(number_bits));
+  return AstRangeType::Limits(AstBitsetType::Min(number_bits),
+                              AstBitsetType::Max(number_bits));
 }
 
-RangeType::Limits Type::IntersectRangeAndBitset(Type* range, Type* bitset,
-                                                Zone* zone) {
-  RangeType::Limits range_lims(range->AsRange());
-  RangeType::Limits bitset_lims = ToLimits(bitset->AsBitset(), zone);
-  return RangeType::Limits::Intersect(range_lims, bitset_lims);
+AstRangeType::Limits AstType::IntersectRangeAndBitset(AstType* range,
+                                                      AstType* bitset,
+                                                      Zone* zone) {
+  AstRangeType::Limits range_lims(range->AsRange());
+  AstRangeType::Limits bitset_lims = ToLimits(bitset->AsBitset(), zone);
+  return AstRangeType::Limits::Intersect(range_lims, bitset_lims);
 }
 
-int Type::IntersectAux(Type* lhs, Type* rhs, UnionType* result, int size,
-                       RangeType::Limits* lims, Zone* zone) {
+int AstType::IntersectAux(AstType* lhs, AstType* rhs, AstUnionType* result,
+                          int size, AstRangeType::Limits* lims, Zone* zone) {
   if (lhs->IsUnion()) {
     for (int i = 0, n = lhs->AsUnion()->Length(); i < n; ++i) {
       size =
@@ -817,31 +807,33 @@ int Type::IntersectAux(Type* lhs, Type* rhs, UnionType* result, int size,
     return size;
   }
 
-  if (!BitsetType::SemanticIsInhabited(lhs->BitsetLub() & rhs->BitsetLub())) {
+  if (!AstBitsetType::SemanticIsInhabited(lhs->BitsetLub() &
+                                          rhs->BitsetLub())) {
     return size;
   }
 
   if (lhs->IsRange()) {
     if (rhs->IsBitset()) {
-      RangeType::Limits lim = IntersectRangeAndBitset(lhs, rhs, zone);
+      AstRangeType::Limits lim = IntersectRangeAndBitset(lhs, rhs, zone);
 
       if (!lim.IsEmpty()) {
-        *lims = RangeType::Limits::Union(lim, *lims);
+        *lims = AstRangeType::Limits::Union(lim, *lims);
       }
       return size;
     }
     if (rhs->IsClass()) {
-      *lims =
-          RangeType::Limits::Union(RangeType::Limits(lhs->AsRange()), *lims);
+      *lims = AstRangeType::Limits::Union(AstRangeType::Limits(lhs->AsRange()),
+                                          *lims);
     }
     if (rhs->IsConstant() && Contains(lhs->AsRange(), rhs->AsConstant())) {
       return AddToUnion(rhs, result, size, zone);
     }
     if (rhs->IsRange()) {
-      RangeType::Limits lim = RangeType::Limits::Intersect(
-          RangeType::Limits(lhs->AsRange()), RangeType::Limits(rhs->AsRange()));
+      AstRangeType::Limits lim =
+          AstRangeType::Limits::Intersect(AstRangeType::Limits(lhs->AsRange()),
+                                          AstRangeType::Limits(rhs->AsRange()));
       if (!lim.IsEmpty()) {
-        *lims = RangeType::Limits::Union(lim, *lims);
+        *lims = AstRangeType::Limits::Union(lim, *lims);
       }
     }
     return size;
@@ -862,29 +854,29 @@ int Type::IntersectAux(Type* lhs, Type* rhs, UnionType* result, int size,
   return size;
 }
 
-
 // Make sure that we produce a well-formed range and bitset:
 // If the range is non-empty, the number bits in the bitset should be
 // clear. Moreover, if we have a canonical range (such as Signed32),
 // we want to produce a bitset rather than a range.
-Type* Type::NormalizeRangeAndBitset(Type* range, bitset* bits, Zone* zone) {
+AstType* AstType::NormalizeRangeAndBitset(AstType* range, bitset* bits,
+                                          Zone* zone) {
   // Fast path: If the bitset does not mention numbers, we can just keep the
   // range.
-  bitset number_bits = BitsetType::NumberBits(*bits);
+  bitset number_bits = AstBitsetType::NumberBits(*bits);
   if (number_bits == 0) {
     return range;
   }
 
   // If the range is semantically contained within the bitset, return None and
   // leave the bitset untouched.
-  bitset range_lub = SEMANTIC(range->BitsetLub());
-  if (BitsetType::Is(range_lub, *bits)) {
+  bitset range_lub = AST_SEMANTIC(range->BitsetLub());
+  if (AstBitsetType::Is(range_lub, *bits)) {
     return None();
   }
 
   // Slow path: reconcile the bitset range and the range.
-  double bitset_min = BitsetType::Min(number_bits);
-  double bitset_max = BitsetType::Max(number_bits);
+  double bitset_min = AstBitsetType::Min(number_bits);
+  double bitset_max = AstBitsetType::Max(number_bits);
 
   double range_min = range->Min();
   double range_max = range->Max();
@@ -905,13 +897,13 @@ Type* Type::NormalizeRangeAndBitset(Type* range, bitset* bits, Zone* zone) {
   if (bitset_max > range_max) {
     range_max = bitset_max;
   }
-  return RangeType::New(range_min, range_max, BitsetType::kNone, zone);
+  return AstRangeType::New(range_min, range_max, AstBitsetType::kNone, zone);
 }
 
-Type* Type::Union(Type* type1, Type* type2, Zone* zone) {
+AstType* AstType::Union(AstType* type1, AstType* type2, Zone* zone) {
   // Fast case: bit sets.
   if (type1->IsBitset() && type2->IsBitset()) {
-    return BitsetType::New(type1->AsBitset() | type2->AsBitset());
+    return AstBitsetType::New(type1->AsBitset() | type2->AsBitset());
   }
 
   // Fast case: top or bottom types.
@@ -936,30 +928,30 @@ Type* Type::Union(Type* type1, Type* type2, Zone* zone) {
   int size = size1 + size2;
   if (!AddIsSafe(size, 2)) return Any();
   size += 2;
-  Type* result_type = UnionType::New(size, zone);
-  UnionType* result = result_type->AsUnion();
+  AstType* result_type = AstUnionType::New(size, zone);
+  AstUnionType* result = result_type->AsUnion();
   size = 0;
 
   // Compute the new bitset.
-  bitset new_bitset = SEMANTIC(type1->BitsetGlb() | type2->BitsetGlb());
+  bitset new_bitset = AST_SEMANTIC(type1->BitsetGlb() | type2->BitsetGlb());
 
   // Deal with ranges.
-  Type* range = None();
-  Type* range1 = type1->GetRange();
-  Type* range2 = type2->GetRange();
+  AstType* range = None();
+  AstType* range1 = type1->GetRange();
+  AstType* range2 = type2->GetRange();
   if (range1 != NULL && range2 != NULL) {
-    RangeType::Limits lims =
-        RangeType::Limits::Union(RangeType::Limits(range1->AsRange()),
-                                 RangeType::Limits(range2->AsRange()));
-    Type* union_range = RangeType::New(lims, representation, zone);
+    AstRangeType::Limits lims =
+        AstRangeType::Limits::Union(AstRangeType::Limits(range1->AsRange()),
+                                    AstRangeType::Limits(range2->AsRange()));
+    AstType* union_range = AstRangeType::New(lims, representation, zone);
     range = NormalizeRangeAndBitset(union_range, &new_bitset, zone);
   } else if (range1 != NULL) {
     range = NormalizeRangeAndBitset(range1, &new_bitset, zone);
   } else if (range2 != NULL) {
     range = NormalizeRangeAndBitset(range2, &new_bitset, zone);
   }
-  new_bitset = SEMANTIC(new_bitset) | representation;
-  Type* bits = BitsetType::New(new_bitset);
+  new_bitset = AST_SEMANTIC(new_bitset) | representation;
+  AstType* bits = AstBitsetType::New(new_bitset);
   result->Set(size++, bits);
   if (!range->IsNone()) result->Set(size++, range);
 
@@ -968,10 +960,10 @@ Type* Type::Union(Type* type1, Type* type2, Zone* zone) {
   return NormalizeUnion(result_type, size, zone);
 }
 
-
 // Add [type] to [result] unless [type] is bitset, range, or already subsumed.
 // Return new size of [result].
-int Type::AddToUnion(Type* type, UnionType* result, int size, Zone* zone) {
+int AstType::AddToUnion(AstType* type, AstUnionType* result, int size,
+                        Zone* zone) {
   if (type->IsBitset() || type->IsRange()) return size;
   if (type->IsUnion()) {
     for (int i = 0, n = type->AsUnion()->Length(); i < n; ++i) {
@@ -986,8 +978,8 @@ int Type::AddToUnion(Type* type, UnionType* result, int size, Zone* zone) {
   return size;
 }
 
-Type* Type::NormalizeUnion(Type* union_type, int size, Zone* zone) {
-  UnionType* unioned = union_type->AsUnion();
+AstType* AstType::NormalizeUnion(AstType* union_type, int size, Zone* zone) {
+  AstUnionType* unioned = union_type->AsUnion();
   DCHECK(size >= 1);
   DCHECK(unioned->Get(0)->IsBitset());
   // If the union has just one element, return it.
@@ -996,15 +988,15 @@ Type* Type::NormalizeUnion(Type* union_type, int size, Zone* zone) {
   }
   bitset bits = unioned->Get(0)->AsBitset();
   // If the union only consists of a range, we can get rid of the union.
-  if (size == 2 && SEMANTIC(bits) == BitsetType::kNone) {
-    bitset representation = REPRESENTATION(bits);
+  if (size == 2 && AST_SEMANTIC(bits) == AstBitsetType::kNone) {
+    bitset representation = AST_REPRESENTATION(bits);
     if (representation == unioned->Get(1)->Representation()) {
       return unioned->Get(1);
     }
     if (unioned->Get(1)->IsRange()) {
-      return RangeType::New(unioned->Get(1)->AsRange()->Min(),
-                            unioned->Get(1)->AsRange()->Max(),
-                            unioned->Get(0)->AsBitset(), zone);
+      return AstRangeType::New(unioned->Get(1)->AsRange()->Min(),
+                               unioned->Get(1)->AsRange()->Max(),
+                               unioned->Get(0)->AsBitset(), zone);
     }
   }
   unioned->Shrink(size);
@@ -1012,26 +1004,23 @@ Type* Type::NormalizeUnion(Type* union_type, int size, Zone* zone) {
   return union_type;
 }
 
-
 // -----------------------------------------------------------------------------
 // Component extraction
 
 // static
-Type* Type::Representation(Type* t, Zone* zone) {
-  return BitsetType::New(t->Representation());
+AstType* AstType::Representation(AstType* t, Zone* zone) {
+  return AstBitsetType::New(t->Representation());
 }
 
-
 // static
-Type* Type::Semantic(Type* t, Zone* zone) {
-  return Intersect(t, BitsetType::New(BitsetType::kSemantic), zone);
+AstType* AstType::Semantic(AstType* t, Zone* zone) {
+  return Intersect(t, AstBitsetType::New(AstBitsetType::kSemantic), zone);
 }
 
-
 // -----------------------------------------------------------------------------
 // Iteration.
 
-int Type::NumClasses() {
+int AstType::NumClasses() {
   DisallowHeapAllocation no_allocation;
   if (this->IsClass()) {
     return 1;
@@ -1046,7 +1035,7 @@ int Type::NumClasses() {
   }
 }
 
-int Type::NumConstants() {
+int AstType::NumConstants() {
   DisallowHeapAllocation no_allocation;
   if (this->IsConstant()) {
     return 1;
@@ -1062,48 +1051,47 @@ int Type::NumConstants() {
 }
 
 template <class T>
-Type* Type::Iterator<T>::get_type() {
+AstType* AstType::Iterator<T>::get_type() {
   DCHECK(!Done());
   return type_->IsUnion() ? type_->AsUnion()->Get(index_) : type_;
 }
 
-
 // C++ cannot specialise nested templates, so we have to go through this
 // contortion with an auxiliary template to simulate it.
 template <class T>
 struct TypeImplIteratorAux {
-  static bool matches(Type* type);
-  static i::Handle<T> current(Type* type);
+  static bool matches(AstType* type);
+  static i::Handle<T> current(AstType* type);
 };
 
 template <>
 struct TypeImplIteratorAux<i::Map> {
-  static bool matches(Type* type) { return type->IsClass(); }
-  static i::Handle<i::Map> current(Type* type) {
+  static bool matches(AstType* type) { return type->IsClass(); }
+  static i::Handle<i::Map> current(AstType* type) {
     return type->AsClass()->Map();
   }
 };
 
 template <>
 struct TypeImplIteratorAux<i::Object> {
-  static bool matches(Type* type) { return type->IsConstant(); }
-  static i::Handle<i::Object> current(Type* type) {
+  static bool matches(AstType* type) { return type->IsConstant(); }
+  static i::Handle<i::Object> current(AstType* type) {
     return type->AsConstant()->Value();
   }
 };
 
 template <class T>
-bool Type::Iterator<T>::matches(Type* type) {
+bool AstType::Iterator<T>::matches(AstType* type) {
   return TypeImplIteratorAux<T>::matches(type);
 }
 
 template <class T>
-i::Handle<T> Type::Iterator<T>::Current() {
+i::Handle<T> AstType::Iterator<T>::Current() {
   return TypeImplIteratorAux<T>::current(get_type());
 }
 
 template <class T>
-void Type::Iterator<T>::Advance() {
+void AstType::Iterator<T>::Advance() {
   DisallowHeapAllocation no_allocation;
   ++index_;
   if (type_->IsUnion()) {
@@ -1116,31 +1104,33 @@ void Type::Iterator<T>::Advance() {
   index_ = -1;
 }
 
-
 // -----------------------------------------------------------------------------
 // Printing.
 
-const char* BitsetType::Name(bitset bits) {
+const char* AstBitsetType::Name(bitset bits) {
   switch (bits) {
-    case REPRESENTATION(kAny): return "Any";
-    #define RETURN_NAMED_REPRESENTATION_TYPE(type, value) \
-    case REPRESENTATION(k##type): return #type;
-    REPRESENTATION_BITSET_TYPE_LIST(RETURN_NAMED_REPRESENTATION_TYPE)
-    #undef RETURN_NAMED_REPRESENTATION_TYPE
-
-    #define RETURN_NAMED_SEMANTIC_TYPE(type, value) \
-    case SEMANTIC(k##type): return #type;
-    SEMANTIC_BITSET_TYPE_LIST(RETURN_NAMED_SEMANTIC_TYPE)
-    INTERNAL_BITSET_TYPE_LIST(RETURN_NAMED_SEMANTIC_TYPE)
-    #undef RETURN_NAMED_SEMANTIC_TYPE
+    case AST_REPRESENTATION(kAny):
+      return "Any";
+#define RETURN_NAMED_REPRESENTATION_TYPE(type, value) \
+  case AST_REPRESENTATION(k##type):                   \
+    return #type;
+      AST_REPRESENTATION_BITSET_TYPE_LIST(RETURN_NAMED_REPRESENTATION_TYPE)
+#undef RETURN_NAMED_REPRESENTATION_TYPE
+
+#define RETURN_NAMED_SEMANTIC_TYPE(type, value) \
+  case AST_SEMANTIC(k##type):                   \
+    return #type;
+      AST_SEMANTIC_BITSET_TYPE_LIST(RETURN_NAMED_SEMANTIC_TYPE)
+      AST_INTERNAL_BITSET_TYPE_LIST(RETURN_NAMED_SEMANTIC_TYPE)
+#undef RETURN_NAMED_SEMANTIC_TYPE
 
     default:
       return NULL;
   }
 }
 
-void BitsetType::Print(std::ostream& os,  // NOLINT
-                       bitset bits) {
+void AstBitsetType::Print(std::ostream& os,  // NOLINT
+                          bitset bits) {
   DisallowHeapAllocation no_allocation;
   const char* name = Name(bits);
   if (name != NULL) {
@@ -1150,13 +1140,13 @@ void BitsetType::Print(std::ostream& os,  // NOLINT
 
   // clang-format off
   static const bitset named_bitsets[] = {
-#define BITSET_CONSTANT(type, value) REPRESENTATION(k##type),
-    REPRESENTATION_BITSET_TYPE_LIST(BITSET_CONSTANT)
+#define BITSET_CONSTANT(type, value) AST_REPRESENTATION(k##type),
+    AST_REPRESENTATION_BITSET_TYPE_LIST(BITSET_CONSTANT)
 #undef BITSET_CONSTANT
 
-#define BITSET_CONSTANT(type, value) SEMANTIC(k##type),
-    INTERNAL_BITSET_TYPE_LIST(BITSET_CONSTANT)
-    SEMANTIC_BITSET_TYPE_LIST(BITSET_CONSTANT)
+#define BITSET_CONSTANT(type, value) AST_SEMANTIC(k##type),
+    AST_INTERNAL_BITSET_TYPE_LIST(BITSET_CONSTANT)
+    AST_SEMANTIC_BITSET_TYPE_LIST(BITSET_CONSTANT)
 #undef BITSET_CONSTANT
   };
   // clang-format on
@@ -1176,14 +1166,14 @@ void BitsetType::Print(std::ostream& os,  // NOLINT
   os << ")";
 }
 
-void Type::PrintTo(std::ostream& os, PrintDimension dim) {
+void AstType::PrintTo(std::ostream& os, PrintDimension dim) {
   DisallowHeapAllocation no_allocation;
   if (dim != REPRESENTATION_DIM) {
     if (this->IsBitset()) {
-      BitsetType::Print(os, SEMANTIC(this->AsBitset()));
+      AstBitsetType::Print(os, AST_SEMANTIC(this->AsBitset()));
     } else if (this->IsClass()) {
       os << "Class(" << static_cast<void*>(*this->AsClass()->Map()) << " < ";
-      BitsetType::New(BitsetType::Lub(this))->PrintTo(os, dim);
+      AstBitsetType::New(AstBitsetType::Lub(this))->PrintTo(os, dim);
       os << ")";
     } else if (this->IsConstant()) {
       os << "Constant(" << Brief(*this->AsConstant()->Value()) << ")";
@@ -1201,7 +1191,7 @@ void Type::PrintTo(std::ostream& os, PrintDimension dim) {
     } else if (this->IsUnion()) {
       os << "(";
       for (int i = 0, n = this->AsUnion()->Length(); i < n; ++i) {
-        Type* type_i = this->AsUnion()->Get(i);
+        AstType* type_i = this->AsUnion()->Get(i);
         if (i > 0) os << " | ";
         type_i->PrintTo(os, dim);
       }
@@ -1225,7 +1215,7 @@ void Type::PrintTo(std::ostream& os, PrintDimension dim) {
     } else if (this->IsTuple()) {
       os << "<";
       for (int i = 0, n = this->AsTuple()->Arity(); i < n; ++i) {
-        Type* type_i = this->AsTuple()->Element(i);
+        AstType* type_i = this->AsTuple()->Element(i);
         if (i > 0) os << ", ";
         type_i->PrintTo(os, dim);
       }
@@ -1236,34 +1226,33 @@ void Type::PrintTo(std::ostream& os, PrintDimension dim) {
   }
   if (dim == BOTH_DIMS) os << "/";
   if (dim != SEMANTIC_DIM) {
-    BitsetType::Print(os, REPRESENTATION(this->BitsetLub()));
+    AstBitsetType::Print(os, AST_REPRESENTATION(this->BitsetLub()));
   }
 }
 
-
 #ifdef DEBUG
-void Type::Print() {
+void AstType::Print() {
   OFStream os(stdout);
   PrintTo(os);
   os << std::endl;
 }
-void BitsetType::Print(bitset bits) {
+void AstBitsetType::Print(bitset bits) {
   OFStream os(stdout);
   Print(os, bits);
   os << std::endl;
 }
 #endif
 
-BitsetType::bitset BitsetType::SignedSmall() {
+AstBitsetType::bitset AstBitsetType::SignedSmall() {
   return i::SmiValuesAre31Bits() ? kSigned31 : kSigned32;
 }
 
-BitsetType::bitset BitsetType::UnsignedSmall() {
+AstBitsetType::bitset AstBitsetType::UnsignedSmall() {
   return i::SmiValuesAre31Bits() ? kUnsigned30 : kUnsigned31;
 }
 
 #define CONSTRUCT_SIMD_TYPE(NAME, Name, name, lane_count, lane_type) \
-  Type* Type::Name(Isolate* isolate, Zone* zone) {                   \
+  AstType* AstType::Name(Isolate* isolate, Zone* zone) {             \
     return Class(i::handle(isolate->heap()->name##_map()), zone);    \
   }
 SIMD128_TYPES(CONSTRUCT_SIMD_TYPE)
@@ -1272,8 +1261,8 @@ SIMD128_TYPES(CONSTRUCT_SIMD_TYPE)
 // -----------------------------------------------------------------------------
 // Instantiations.
 
-template class Type::Iterator<i::Map>;
-template class Type::Iterator<i::Object>;
+template class AstType::Iterator<i::Map>;
+template class AstType::Iterator<i::Object>;
 
 }  // namespace internal
 }  // namespace v8