Get rid of code duplication by computing int Lub using range Lub.

R=rossberg@chromium.org
BUG=

Review URL: https://codereview.chromium.org/616563002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24320 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/types.cc

@@ -274,37 +274,11 @@ TypeImpl<Config>::BitsetType::Lub(double value) {
   DisallowHeapAllocation no_allocation;
   if (i::IsMinusZero(value)) return kMinusZero;
   if (std::isnan(value)) return kNaN;
-  if (IsUint32Double(value)) return Lub(FastD2UI(value));
-  if (IsInt32Double(value)) return Lub(FastD2I(value));
+  if (IsUint32Double(value) || IsInt32Double(value)) return Lub(value, value);
   return kOtherNumber;
 }
 
 
-template<class Config>
-typename TypeImpl<Config>::bitset
-TypeImpl<Config>::BitsetType::Lub(int32_t value) {
-  DisallowHeapAllocation no_allocation;
-  if (value >= 0x40000000) {
-    return i::SmiValuesAre31Bits() ? kOtherUnsigned31 : kUnsignedSmall;
-  }
-  if (value >= 0) return kUnsignedSmall;
-  if (value >= -0x40000000) return kOtherSignedSmall;
-  return i::SmiValuesAre31Bits() ? kOtherSigned32 : kOtherSignedSmall;
-}
-
-
-template<class Config>
-typename TypeImpl<Config>::bitset
-TypeImpl<Config>::BitsetType::Lub(uint32_t value) {
-  DisallowHeapAllocation no_allocation;
-  if (value >= 0x80000000u) return kOtherUnsigned32;
-  if (value >= 0x40000000u) {
-    return i::SmiValuesAre31Bits() ? kOtherUnsigned31 : kUnsignedSmall;
-  }
-  return kUnsignedSmall;
-}
-
-
 // Minimum values of regular numeric bitsets when SmiValuesAre31Bits.
 template<class Config>
 const typename TypeImpl<Config>::BitsetType::BitsetMin
@@ -334,10 +308,8 @@ TypeImpl<Config>::BitsetType::BitsetMins32[] = {
 
 template<class Config>
 typename TypeImpl<Config>::bitset
-TypeImpl<Config>::BitsetType::Lub(Limits lim) {
+TypeImpl<Config>::BitsetType::Lub(double min, double max) {
   DisallowHeapAllocation no_allocation;
-  double min = lim.min->Number();
-  double max = lim.max->Number();
   int lub = kNone;
   const BitsetMin* mins = BitsetMins();
 

src/types.h

@@ -598,12 +598,10 @@ class TypeImpl<Config>::BitsetType : public TypeImpl<Config> {
 
   static bitset Glb(TypeImpl* type);  // greatest lower bound that's a bitset
   static bitset Lub(TypeImpl* type);  // least upper bound that's a bitset
+  static bitset Lub(i::Map* map);
   static bitset Lub(i::Object* value);
   static bitset Lub(double value);
-  static bitset Lub(int32_t value);
-  static bitset Lub(uint32_t value);
-  static bitset Lub(i::Map* map);
-  static bitset Lub(Limits lim);
+  static bitset Lub(double min, double max);
 
   static const char* Name(bitset);
   static void Print(std::ostream& os, bitset);  // NOLINT
@@ -781,7 +779,8 @@ class TypeImpl<Config>::RangeType : public StructuralType {
     DCHECK(min->Number() <= max->Number());
     RangeHandle type = Config::template cast<RangeType>(
         StructuralType::New(StructuralType::kRangeTag, 3, region));
-    type->Set(0, BitsetType::New(BitsetType::Lub(Limits(min, max)), region));
+    type->Set(0, BitsetType::New(
+        BitsetType::Lub(min->Number(), max->Number()), region));
     type->SetValue(1, min);
     type->SetValue(2, max);
     return type;