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

src/types.cc

Index: src/types.cc
diff --git a/src/types.cc b/src/types.cc
index c3184c684498ab634f186d0b350e274bc2736af3..70ee43db4a5c843dfa82c2527b088b044c40da18 100644
--- a/src/types.cc
+++ b/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();