192 compile->type_arena()->Afree(ptr,compile->type_last_size()); 193 } 194 195 // Initialize the type system for a particular compilation. 196 static void Initialize(Compile* compile); 197 198 // Initialize the types shared by all compilations. 199 static void Initialize_shared(Compile* compile); 200 201 TYPES base() const { 202 assert(_base > Bad && _base < lastype, "sanity"); 203 return _base; 204 } 205 206 // Create a new hash-consd type 207 static const Type *make(enum TYPES); 208 // Test for equivalence of types 209 static int cmp( const Type *const t1, const Type *const t2 ); 210 // Test for higher or equal in lattice 211 // Variant that drops the speculative part of the types 212 int higher_equal(const Type *t) const { 213 return !cmp(meet(t),t->remove_speculative()); 214 } 215 // Variant that keeps the speculative part of the types 216 int higher_equal_speculative(const Type *t) const { 217 return !cmp(meet_speculative(t),t); 218 } 219 220 // MEET operation; lower in lattice. 221 // Variant that drops the speculative part of the types 222 const Type *meet(const Type *t) const { 223 return meet_helper(t, false); 224 } 225 // Variant that keeps the speculative part of the types 226 const Type *meet_speculative(const Type *t) const { 227 return meet_helper(t, true); 228 } 229 // WIDEN: 'widens' for Ints and other range types 230 virtual const Type *widen( const Type *old, const Type* limit ) const { return this; } 231 // NARROW: complement for widen, used by pessimistic phases 232 virtual const Type *narrow( const Type *old ) const { return this; } 233 234 // DUAL operation: reflect around lattice centerline. Used instead of 235 // join to ensure my lattice is symmetric up and down. 236 const Type *dual() const { return _dual; } | 192 compile->type_arena()->Afree(ptr,compile->type_last_size()); 193 } 194 195 // Initialize the type system for a particular compilation. 196 static void Initialize(Compile* compile); 197 198 // Initialize the types shared by all compilations. 199 static void Initialize_shared(Compile* compile); 200 201 TYPES base() const { 202 assert(_base > Bad && _base < lastype, "sanity"); 203 return _base; 204 } 205 206 // Create a new hash-consd type 207 static const Type *make(enum TYPES); 208 // Test for equivalence of types 209 static int cmp( const Type *const t1, const Type *const t2 ); 210 // Test for higher or equal in lattice 211 // Variant that drops the speculative part of the types 212 bool higher_equal(const Type *t) const { 213 return !cmp(meet(t),t->remove_speculative()); 214 } 215 // Variant that keeps the speculative part of the types 216 bool higher_equal_speculative(const Type *t) const { 217 return !cmp(meet_speculative(t),t); 218 } 219 220 // MEET operation; lower in lattice. 221 // Variant that drops the speculative part of the types 222 const Type *meet(const Type *t) const { 223 return meet_helper(t, false); 224 } 225 // Variant that keeps the speculative part of the types 226 const Type *meet_speculative(const Type *t) const { 227 return meet_helper(t, true); 228 } 229 // WIDEN: 'widens' for Ints and other range types 230 virtual const Type *widen( const Type *old, const Type* limit ) const { return this; } 231 // NARROW: complement for widen, used by pessimistic phases 232 virtual const Type *narrow( const Type *old ) const { return this; } 233 234 // DUAL operation: reflect around lattice centerline. Used instead of 235 // join to ensure my lattice is symmetric up and down. 236 const Type *dual() const { return _dual; } |