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type.cpp
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type.cpp
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/*
* Copyright (c) 1997, 2024, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#include "precompiled.hpp"
#include "ci/ciMethodData.hpp"
#include "ci/ciTypeFlow.hpp"
#include "classfile/javaClasses.hpp"
#include "classfile/symbolTable.hpp"
#include "compiler/compileLog.hpp"
#include "libadt/dict.hpp"
#include "memory/oopFactory.hpp"
#include "memory/resourceArea.hpp"
#include "oops/instanceKlass.hpp"
#include "oops/instanceMirrorKlass.hpp"
#include "oops/objArrayKlass.hpp"
#include "oops/typeArrayKlass.hpp"
#include "opto/matcher.hpp"
#include "opto/node.hpp"
#include "opto/opcodes.hpp"
#include "opto/type.hpp"
#include "utilities/checkedCast.hpp"
#include "utilities/powerOfTwo.hpp"
#include "utilities/stringUtils.hpp"
// Portions of code courtesy of Clifford Click
// Optimization - Graph Style
// Dictionary of types shared among compilations.
Dict* Type::_shared_type_dict = nullptr;
// Array which maps compiler types to Basic Types
const Type::TypeInfo Type::_type_info[Type::lastype] = {
{ Bad, T_ILLEGAL, "bad", false, Node::NotAMachineReg, relocInfo::none }, // Bad
{ Control, T_ILLEGAL, "control", false, 0, relocInfo::none }, // Control
{ Bottom, T_VOID, "top", false, 0, relocInfo::none }, // Top
{ Bad, T_INT, "int:", false, Op_RegI, relocInfo::none }, // Int
{ Bad, T_LONG, "long:", false, Op_RegL, relocInfo::none }, // Long
{ Half, T_VOID, "half", false, 0, relocInfo::none }, // Half
{ Bad, T_NARROWOOP, "narrowoop:", false, Op_RegN, relocInfo::none }, // NarrowOop
{ Bad, T_NARROWKLASS,"narrowklass:", false, Op_RegN, relocInfo::none }, // NarrowKlass
{ Bad, T_ILLEGAL, "tuple:", false, Node::NotAMachineReg, relocInfo::none }, // Tuple
{ Bad, T_ARRAY, "array:", false, Node::NotAMachineReg, relocInfo::none }, // Array
{ Bad, T_ARRAY, "interfaces:", false, Node::NotAMachineReg, relocInfo::none }, // Interfaces
#if defined(PPC64)
{ Bad, T_ILLEGAL, "vectormask:", false, Op_RegVectMask, relocInfo::none }, // VectorMask.
{ Bad, T_ILLEGAL, "vectora:", false, Op_VecA, relocInfo::none }, // VectorA.
{ Bad, T_ILLEGAL, "vectors:", false, 0, relocInfo::none }, // VectorS
{ Bad, T_ILLEGAL, "vectord:", false, Op_RegL, relocInfo::none }, // VectorD
{ Bad, T_ILLEGAL, "vectorx:", false, Op_VecX, relocInfo::none }, // VectorX
{ Bad, T_ILLEGAL, "vectory:", false, 0, relocInfo::none }, // VectorY
{ Bad, T_ILLEGAL, "vectorz:", false, 0, relocInfo::none }, // VectorZ
#elif defined(S390)
{ Bad, T_ILLEGAL, "vectormask:", false, Op_RegVectMask, relocInfo::none }, // VectorMask.
{ Bad, T_ILLEGAL, "vectora:", false, Op_VecA, relocInfo::none }, // VectorA.
{ Bad, T_ILLEGAL, "vectors:", false, 0, relocInfo::none }, // VectorS
{ Bad, T_ILLEGAL, "vectord:", false, Op_RegL, relocInfo::none }, // VectorD
{ Bad, T_ILLEGAL, "vectorx:", false, 0, relocInfo::none }, // VectorX
{ Bad, T_ILLEGAL, "vectory:", false, 0, relocInfo::none }, // VectorY
{ Bad, T_ILLEGAL, "vectorz:", false, 0, relocInfo::none }, // VectorZ
#else // all other
{ Bad, T_ILLEGAL, "vectormask:", false, Op_RegVectMask, relocInfo::none }, // VectorMask.
{ Bad, T_ILLEGAL, "vectora:", false, Op_VecA, relocInfo::none }, // VectorA.
{ Bad, T_ILLEGAL, "vectors:", false, Op_VecS, relocInfo::none }, // VectorS
{ Bad, T_ILLEGAL, "vectord:", false, Op_VecD, relocInfo::none }, // VectorD
{ Bad, T_ILLEGAL, "vectorx:", false, Op_VecX, relocInfo::none }, // VectorX
{ Bad, T_ILLEGAL, "vectory:", false, Op_VecY, relocInfo::none }, // VectorY
{ Bad, T_ILLEGAL, "vectorz:", false, Op_VecZ, relocInfo::none }, // VectorZ
#endif
{ Bad, T_ADDRESS, "anyptr:", false, Op_RegP, relocInfo::none }, // AnyPtr
{ Bad, T_ADDRESS, "rawptr:", false, Op_RegP, relocInfo::none }, // RawPtr
{ Bad, T_OBJECT, "oop:", true, Op_RegP, relocInfo::oop_type }, // OopPtr
{ Bad, T_OBJECT, "inst:", true, Op_RegP, relocInfo::oop_type }, // InstPtr
{ Bad, T_OBJECT, "ary:", true, Op_RegP, relocInfo::oop_type }, // AryPtr
{ Bad, T_METADATA, "metadata:", false, Op_RegP, relocInfo::metadata_type }, // MetadataPtr
{ Bad, T_METADATA, "klass:", false, Op_RegP, relocInfo::metadata_type }, // KlassPtr
{ Bad, T_METADATA, "instklass:", false, Op_RegP, relocInfo::metadata_type }, // InstKlassPtr
{ Bad, T_METADATA, "aryklass:", false, Op_RegP, relocInfo::metadata_type }, // AryKlassPtr
{ Bad, T_OBJECT, "func", false, 0, relocInfo::none }, // Function
{ Abio, T_ILLEGAL, "abIO", false, 0, relocInfo::none }, // Abio
{ Return_Address, T_ADDRESS, "return_address",false, Op_RegP, relocInfo::none }, // Return_Address
{ Memory, T_ILLEGAL, "memory", false, 0, relocInfo::none }, // Memory
{ FloatBot, T_FLOAT, "float_top", false, Op_RegF, relocInfo::none }, // FloatTop
{ FloatCon, T_FLOAT, "ftcon:", false, Op_RegF, relocInfo::none }, // FloatCon
{ FloatTop, T_FLOAT, "float", false, Op_RegF, relocInfo::none }, // FloatBot
{ DoubleBot, T_DOUBLE, "double_top", false, Op_RegD, relocInfo::none }, // DoubleTop
{ DoubleCon, T_DOUBLE, "dblcon:", false, Op_RegD, relocInfo::none }, // DoubleCon
{ DoubleTop, T_DOUBLE, "double", false, Op_RegD, relocInfo::none }, // DoubleBot
{ Top, T_ILLEGAL, "bottom", false, 0, relocInfo::none } // Bottom
};
// Map ideal registers (machine types) to ideal types
const Type *Type::mreg2type[_last_machine_leaf];
// Map basic types to canonical Type* pointers.
const Type* Type:: _const_basic_type[T_CONFLICT+1];
// Map basic types to constant-zero Types.
const Type* Type:: _zero_type[T_CONFLICT+1];
// Map basic types to array-body alias types.
const TypeAryPtr* TypeAryPtr::_array_body_type[T_CONFLICT+1];
const TypeInterfaces* TypeAryPtr::_array_interfaces = nullptr;
const TypeInterfaces* TypeAryKlassPtr::_array_interfaces = nullptr;
//=============================================================================
// Convenience common pre-built types.
const Type *Type::ABIO; // State-of-machine only
const Type *Type::BOTTOM; // All values
const Type *Type::CONTROL; // Control only
const Type *Type::DOUBLE; // All doubles
const Type *Type::FLOAT; // All floats
const Type *Type::HALF; // Placeholder half of doublewide type
const Type *Type::MEMORY; // Abstract store only
const Type *Type::RETURN_ADDRESS;
const Type *Type::TOP; // No values in set
//------------------------------get_const_type---------------------------
const Type* Type::get_const_type(ciType* type, InterfaceHandling interface_handling) {
if (type == nullptr) {
return nullptr;
} else if (type->is_primitive_type()) {
return get_const_basic_type(type->basic_type());
} else {
return TypeOopPtr::make_from_klass(type->as_klass(), interface_handling);
}
}
//---------------------------array_element_basic_type---------------------------------
// Mapping to the array element's basic type.
BasicType Type::array_element_basic_type() const {
BasicType bt = basic_type();
if (bt == T_INT) {
if (this == TypeInt::INT) return T_INT;
if (this == TypeInt::CHAR) return T_CHAR;
if (this == TypeInt::BYTE) return T_BYTE;
if (this == TypeInt::BOOL) return T_BOOLEAN;
if (this == TypeInt::SHORT) return T_SHORT;
return T_VOID;
}
return bt;
}
// For two instance arrays of same dimension, return the base element types.
// Otherwise or if the arrays have different dimensions, return null.
void Type::get_arrays_base_elements(const Type *a1, const Type *a2,
const TypeInstPtr **e1, const TypeInstPtr **e2) {
if (e1) *e1 = nullptr;
if (e2) *e2 = nullptr;
const TypeAryPtr* a1tap = (a1 == nullptr) ? nullptr : a1->isa_aryptr();
const TypeAryPtr* a2tap = (a2 == nullptr) ? nullptr : a2->isa_aryptr();
if (a1tap != nullptr && a2tap != nullptr) {
// Handle multidimensional arrays
const TypePtr* a1tp = a1tap->elem()->make_ptr();
const TypePtr* a2tp = a2tap->elem()->make_ptr();
while (a1tp && a1tp->isa_aryptr() && a2tp && a2tp->isa_aryptr()) {
a1tap = a1tp->is_aryptr();
a2tap = a2tp->is_aryptr();
a1tp = a1tap->elem()->make_ptr();
a2tp = a2tap->elem()->make_ptr();
}
if (a1tp && a1tp->isa_instptr() && a2tp && a2tp->isa_instptr()) {
if (e1) *e1 = a1tp->is_instptr();
if (e2) *e2 = a2tp->is_instptr();
}
}
}
//---------------------------get_typeflow_type---------------------------------
// Import a type produced by ciTypeFlow.
const Type* Type::get_typeflow_type(ciType* type) {
switch (type->basic_type()) {
case ciTypeFlow::StateVector::T_BOTTOM:
assert(type == ciTypeFlow::StateVector::bottom_type(), "");
return Type::BOTTOM;
case ciTypeFlow::StateVector::T_TOP:
assert(type == ciTypeFlow::StateVector::top_type(), "");
return Type::TOP;
case ciTypeFlow::StateVector::T_NULL:
assert(type == ciTypeFlow::StateVector::null_type(), "");
return TypePtr::NULL_PTR;
case ciTypeFlow::StateVector::T_LONG2:
// The ciTypeFlow pass pushes a long, then the half.
// We do the same.
assert(type == ciTypeFlow::StateVector::long2_type(), "");
return TypeInt::TOP;
case ciTypeFlow::StateVector::T_DOUBLE2:
// The ciTypeFlow pass pushes double, then the half.
// Our convention is the same.
assert(type == ciTypeFlow::StateVector::double2_type(), "");
return Type::TOP;
case T_ADDRESS:
assert(type->is_return_address(), "");
return TypeRawPtr::make((address)(intptr_t)type->as_return_address()->bci());
default:
// make sure we did not mix up the cases:
assert(type != ciTypeFlow::StateVector::bottom_type(), "");
assert(type != ciTypeFlow::StateVector::top_type(), "");
assert(type != ciTypeFlow::StateVector::null_type(), "");
assert(type != ciTypeFlow::StateVector::long2_type(), "");
assert(type != ciTypeFlow::StateVector::double2_type(), "");
assert(!type->is_return_address(), "");
return Type::get_const_type(type);
}
}
//-----------------------make_from_constant------------------------------------
const Type* Type::make_from_constant(ciConstant constant, bool require_constant,
int stable_dimension, bool is_narrow_oop,
bool is_autobox_cache) {
switch (constant.basic_type()) {
case T_BOOLEAN: return TypeInt::make(constant.as_boolean());
case T_CHAR: return TypeInt::make(constant.as_char());
case T_BYTE: return TypeInt::make(constant.as_byte());
case T_SHORT: return TypeInt::make(constant.as_short());
case T_INT: return TypeInt::make(constant.as_int());
case T_LONG: return TypeLong::make(constant.as_long());
case T_FLOAT: return TypeF::make(constant.as_float());
case T_DOUBLE: return TypeD::make(constant.as_double());
case T_ARRAY:
case T_OBJECT: {
const Type* con_type = nullptr;
ciObject* oop_constant = constant.as_object();
if (oop_constant->is_null_object()) {
con_type = Type::get_zero_type(T_OBJECT);
} else {
guarantee(require_constant || oop_constant->should_be_constant(), "con_type must get computed");
con_type = TypeOopPtr::make_from_constant(oop_constant, require_constant);
if (Compile::current()->eliminate_boxing() && is_autobox_cache) {
con_type = con_type->is_aryptr()->cast_to_autobox_cache();
}
if (stable_dimension > 0) {
assert(FoldStableValues, "sanity");
assert(!con_type->is_zero_type(), "default value for stable field");
con_type = con_type->is_aryptr()->cast_to_stable(true, stable_dimension);
}
}
if (is_narrow_oop) {
con_type = con_type->make_narrowoop();
}
return con_type;
}
case T_ILLEGAL:
// Invalid ciConstant returned due to OutOfMemoryError in the CI
assert(Compile::current()->env()->failing(), "otherwise should not see this");
return nullptr;
default:
// Fall through to failure
return nullptr;
}
}
static ciConstant check_mismatched_access(ciConstant con, BasicType loadbt, bool is_unsigned) {
BasicType conbt = con.basic_type();
switch (conbt) {
case T_BOOLEAN: conbt = T_BYTE; break;
case T_ARRAY: conbt = T_OBJECT; break;
default: break;
}
switch (loadbt) {
case T_BOOLEAN: loadbt = T_BYTE; break;
case T_NARROWOOP: loadbt = T_OBJECT; break;
case T_ARRAY: loadbt = T_OBJECT; break;
case T_ADDRESS: loadbt = T_OBJECT; break;
default: break;
}
if (conbt == loadbt) {
if (is_unsigned && conbt == T_BYTE) {
// LoadB (T_BYTE) with a small mask (<=8-bit) is converted to LoadUB (T_BYTE).
return ciConstant(T_INT, con.as_int() & 0xFF);
} else {
return con;
}
}
if (conbt == T_SHORT && loadbt == T_CHAR) {
// LoadS (T_SHORT) with a small mask (<=16-bit) is converted to LoadUS (T_CHAR).
return ciConstant(T_INT, con.as_int() & 0xFFFF);
}
return ciConstant(); // T_ILLEGAL
}
// Try to constant-fold a stable array element.
const Type* Type::make_constant_from_array_element(ciArray* array, int off, int stable_dimension,
BasicType loadbt, bool is_unsigned_load) {
// Decode the results of GraphKit::array_element_address.
ciConstant element_value = array->element_value_by_offset(off);
if (element_value.basic_type() == T_ILLEGAL) {
return nullptr; // wrong offset
}
ciConstant con = check_mismatched_access(element_value, loadbt, is_unsigned_load);
assert(con.basic_type() != T_ILLEGAL, "elembt=%s; loadbt=%s; unsigned=%d",
type2name(element_value.basic_type()), type2name(loadbt), is_unsigned_load);
if (con.is_valid() && // not a mismatched access
!con.is_null_or_zero()) { // not a default value
bool is_narrow_oop = (loadbt == T_NARROWOOP);
return Type::make_from_constant(con, /*require_constant=*/true, stable_dimension, is_narrow_oop, /*is_autobox_cache=*/false);
}
return nullptr;
}
const Type* Type::make_constant_from_field(ciInstance* holder, int off, bool is_unsigned_load, BasicType loadbt) {
ciField* field;
ciType* type = holder->java_mirror_type();
if (type != nullptr && type->is_instance_klass() && off >= InstanceMirrorKlass::offset_of_static_fields()) {
// Static field
field = type->as_instance_klass()->get_field_by_offset(off, /*is_static=*/true);
} else {
// Instance field
field = holder->klass()->as_instance_klass()->get_field_by_offset(off, /*is_static=*/false);
}
if (field == nullptr) {
return nullptr; // Wrong offset
}
return Type::make_constant_from_field(field, holder, loadbt, is_unsigned_load);
}
const Type* Type::make_constant_from_field(ciField* field, ciInstance* holder,
BasicType loadbt, bool is_unsigned_load) {
if (!field->is_constant()) {
return nullptr; // Non-constant field
}
ciConstant field_value;
if (field->is_static()) {
// final static field
field_value = field->constant_value();
} else if (holder != nullptr) {
// final or stable non-static field
// Treat final non-static fields of trusted classes (classes in
// java.lang.invoke and sun.invoke packages and subpackages) as
// compile time constants.
field_value = field->constant_value_of(holder);
}
if (!field_value.is_valid()) {
return nullptr; // Not a constant
}
ciConstant con = check_mismatched_access(field_value, loadbt, is_unsigned_load);
assert(con.is_valid(), "elembt=%s; loadbt=%s; unsigned=%d",
type2name(field_value.basic_type()), type2name(loadbt), is_unsigned_load);
bool is_stable_array = FoldStableValues && field->is_stable() && field->type()->is_array_klass();
int stable_dimension = (is_stable_array ? field->type()->as_array_klass()->dimension() : 0);
bool is_narrow_oop = (loadbt == T_NARROWOOP);
const Type* con_type = make_from_constant(con, /*require_constant=*/ true,
stable_dimension, is_narrow_oop,
field->is_autobox_cache());
if (con_type != nullptr && field->is_call_site_target()) {
ciCallSite* call_site = holder->as_call_site();
if (!call_site->is_fully_initialized_constant_call_site()) {
ciMethodHandle* target = con.as_object()->as_method_handle();
Compile::current()->dependencies()->assert_call_site_target_value(call_site, target);
}
}
return con_type;
}
//------------------------------make-------------------------------------------
// Create a simple Type, with default empty symbol sets. Then hashcons it
// and look for an existing copy in the type dictionary.
const Type *Type::make( enum TYPES t ) {
return (new Type(t))->hashcons();
}
//------------------------------cmp--------------------------------------------
bool Type::equals(const Type* t1, const Type* t2) {
if (t1->_base != t2->_base) {
return false; // Missed badly
}
assert(t1 != t2 || t1->eq(t2), "eq must be reflexive");
return t1->eq(t2);
}
const Type* Type::maybe_remove_speculative(bool include_speculative) const {
if (!include_speculative) {
return remove_speculative();
}
return this;
}
//------------------------------hash-------------------------------------------
int Type::uhash( const Type *const t ) {
return (int)t->hash();
}
#define SMALLINT ((juint)3) // a value too insignificant to consider widening
#define POSITIVE_INFINITE_F 0x7f800000 // hex representation for IEEE 754 single precision positive infinite
#define POSITIVE_INFINITE_D 0x7ff0000000000000 // hex representation for IEEE 754 double precision positive infinite
//--------------------------Initialize_shared----------------------------------
void Type::Initialize_shared(Compile* current) {
// This method does not need to be locked because the first system
// compilations (stub compilations) occur serially. If they are
// changed to proceed in parallel, then this section will need
// locking.
Arena* save = current->type_arena();
Arena* shared_type_arena = new (mtCompiler)Arena(mtCompiler);
current->set_type_arena(shared_type_arena);
// Map the boolean result of Type::equals into a comparator result that CmpKey expects.
CmpKey type_cmp = [](const void* t1, const void* t2) -> int32_t {
return Type::equals((Type*) t1, (Type*) t2) ? 0 : 1;
};
_shared_type_dict = new (shared_type_arena) Dict(type_cmp, (Hash) Type::uhash, shared_type_arena, 128);
current->set_type_dict(_shared_type_dict);
// Make shared pre-built types.
CONTROL = make(Control); // Control only
TOP = make(Top); // No values in set
MEMORY = make(Memory); // Abstract store only
ABIO = make(Abio); // State-of-machine only
RETURN_ADDRESS=make(Return_Address);
FLOAT = make(FloatBot); // All floats
DOUBLE = make(DoubleBot); // All doubles
BOTTOM = make(Bottom); // Everything
HALF = make(Half); // Placeholder half of doublewide type
TypeF::MAX = TypeF::make(max_jfloat); // Float MAX
TypeF::MIN = TypeF::make(min_jfloat); // Float MIN
TypeF::ZERO = TypeF::make(0.0); // Float 0 (positive zero)
TypeF::ONE = TypeF::make(1.0); // Float 1
TypeF::POS_INF = TypeF::make(jfloat_cast(POSITIVE_INFINITE_F));
TypeF::NEG_INF = TypeF::make(-jfloat_cast(POSITIVE_INFINITE_F));
TypeD::MAX = TypeD::make(max_jdouble); // Double MAX
TypeD::MIN = TypeD::make(min_jdouble); // Double MIN
TypeD::ZERO = TypeD::make(0.0); // Double 0 (positive zero)
TypeD::ONE = TypeD::make(1.0); // Double 1
TypeD::POS_INF = TypeD::make(jdouble_cast(POSITIVE_INFINITE_D));
TypeD::NEG_INF = TypeD::make(-jdouble_cast(POSITIVE_INFINITE_D));
TypeInt::MAX = TypeInt::make(max_jint); // Int MAX
TypeInt::MIN = TypeInt::make(min_jint); // Int MIN
TypeInt::MINUS_1 = TypeInt::make(-1); // -1
TypeInt::ZERO = TypeInt::make( 0); // 0
TypeInt::ONE = TypeInt::make( 1); // 1
TypeInt::BOOL = TypeInt::make(0,1, WidenMin); // 0 or 1, FALSE or TRUE.
TypeInt::CC = TypeInt::make(-1, 1, WidenMin); // -1, 0 or 1, condition codes
TypeInt::CC_LT = TypeInt::make(-1,-1, WidenMin); // == TypeInt::MINUS_1
TypeInt::CC_GT = TypeInt::make( 1, 1, WidenMin); // == TypeInt::ONE
TypeInt::CC_EQ = TypeInt::make( 0, 0, WidenMin); // == TypeInt::ZERO
TypeInt::CC_LE = TypeInt::make(-1, 0, WidenMin);
TypeInt::CC_GE = TypeInt::make( 0, 1, WidenMin); // == TypeInt::BOOL
TypeInt::BYTE = TypeInt::make(-128,127, WidenMin); // Bytes
TypeInt::UBYTE = TypeInt::make(0, 255, WidenMin); // Unsigned Bytes
TypeInt::CHAR = TypeInt::make(0,65535, WidenMin); // Java chars
TypeInt::SHORT = TypeInt::make(-32768,32767, WidenMin); // Java shorts
TypeInt::POS = TypeInt::make(0,max_jint, WidenMin); // Non-neg values
TypeInt::POS1 = TypeInt::make(1,max_jint, WidenMin); // Positive values
TypeInt::INT = TypeInt::make(min_jint,max_jint, WidenMax); // 32-bit integers
TypeInt::SYMINT = TypeInt::make(-max_jint,max_jint,WidenMin); // symmetric range
TypeInt::TYPE_DOMAIN = TypeInt::INT;
// CmpL is overloaded both as the bytecode computation returning
// a trinary (-1,0,+1) integer result AND as an efficient long
// compare returning optimizer ideal-type flags.
assert( TypeInt::CC_LT == TypeInt::MINUS_1, "types must match for CmpL to work" );
assert( TypeInt::CC_GT == TypeInt::ONE, "types must match for CmpL to work" );
assert( TypeInt::CC_EQ == TypeInt::ZERO, "types must match for CmpL to work" );
assert( TypeInt::CC_GE == TypeInt::BOOL, "types must match for CmpL to work" );
assert( (juint)(TypeInt::CC->_hi - TypeInt::CC->_lo) <= SMALLINT, "CC is truly small");
TypeLong::MAX = TypeLong::make(max_jlong); // Long MAX
TypeLong::MIN = TypeLong::make(min_jlong); // Long MIN
TypeLong::MINUS_1 = TypeLong::make(-1); // -1
TypeLong::ZERO = TypeLong::make( 0); // 0
TypeLong::ONE = TypeLong::make( 1); // 1
TypeLong::POS = TypeLong::make(0,max_jlong, WidenMin); // Non-neg values
TypeLong::LONG = TypeLong::make(min_jlong,max_jlong,WidenMax); // 64-bit integers
TypeLong::INT = TypeLong::make((jlong)min_jint,(jlong)max_jint,WidenMin);
TypeLong::UINT = TypeLong::make(0,(jlong)max_juint,WidenMin);
TypeLong::TYPE_DOMAIN = TypeLong::LONG;
const Type **fboth =(const Type**)shared_type_arena->AmallocWords(2*sizeof(Type*));
fboth[0] = Type::CONTROL;
fboth[1] = Type::CONTROL;
TypeTuple::IFBOTH = TypeTuple::make( 2, fboth );
const Type **ffalse =(const Type**)shared_type_arena->AmallocWords(2*sizeof(Type*));
ffalse[0] = Type::CONTROL;
ffalse[1] = Type::TOP;
TypeTuple::IFFALSE = TypeTuple::make( 2, ffalse );
const Type **fneither =(const Type**)shared_type_arena->AmallocWords(2*sizeof(Type*));
fneither[0] = Type::TOP;
fneither[1] = Type::TOP;
TypeTuple::IFNEITHER = TypeTuple::make( 2, fneither );
const Type **ftrue =(const Type**)shared_type_arena->AmallocWords(2*sizeof(Type*));
ftrue[0] = Type::TOP;
ftrue[1] = Type::CONTROL;
TypeTuple::IFTRUE = TypeTuple::make( 2, ftrue );
const Type **floop =(const Type**)shared_type_arena->AmallocWords(2*sizeof(Type*));
floop[0] = Type::CONTROL;
floop[1] = TypeInt::INT;
TypeTuple::LOOPBODY = TypeTuple::make( 2, floop );
TypePtr::NULL_PTR= TypePtr::make(AnyPtr, TypePtr::Null, 0);
TypePtr::NOTNULL = TypePtr::make(AnyPtr, TypePtr::NotNull, OffsetBot);
TypePtr::BOTTOM = TypePtr::make(AnyPtr, TypePtr::BotPTR, OffsetBot);
TypeRawPtr::BOTTOM = TypeRawPtr::make( TypePtr::BotPTR );
TypeRawPtr::NOTNULL= TypeRawPtr::make( TypePtr::NotNull );
const Type **fmembar = TypeTuple::fields(0);
TypeTuple::MEMBAR = TypeTuple::make(TypeFunc::Parms+0, fmembar);
const Type **fsc = (const Type**)shared_type_arena->AmallocWords(2*sizeof(Type*));
fsc[0] = TypeInt::CC;
fsc[1] = Type::MEMORY;
TypeTuple::STORECONDITIONAL = TypeTuple::make(2, fsc);
TypeInstPtr::NOTNULL = TypeInstPtr::make(TypePtr::NotNull, current->env()->Object_klass());
TypeInstPtr::BOTTOM = TypeInstPtr::make(TypePtr::BotPTR, current->env()->Object_klass());
TypeInstPtr::MIRROR = TypeInstPtr::make(TypePtr::NotNull, current->env()->Class_klass());
TypeInstPtr::MARK = TypeInstPtr::make(TypePtr::BotPTR, current->env()->Object_klass(),
false, 0, oopDesc::mark_offset_in_bytes());
TypeInstPtr::KLASS = TypeInstPtr::make(TypePtr::BotPTR, current->env()->Object_klass(),
false, 0, oopDesc::klass_offset_in_bytes());
TypeOopPtr::BOTTOM = TypeOopPtr::make(TypePtr::BotPTR, OffsetBot, TypeOopPtr::InstanceBot);
TypeMetadataPtr::BOTTOM = TypeMetadataPtr::make(TypePtr::BotPTR, nullptr, OffsetBot);
TypeNarrowOop::NULL_PTR = TypeNarrowOop::make( TypePtr::NULL_PTR );
TypeNarrowOop::BOTTOM = TypeNarrowOop::make( TypeInstPtr::BOTTOM );
TypeNarrowKlass::NULL_PTR = TypeNarrowKlass::make( TypePtr::NULL_PTR );
mreg2type[Op_Node] = Type::BOTTOM;
mreg2type[Op_Set ] = 0;
mreg2type[Op_RegN] = TypeNarrowOop::BOTTOM;
mreg2type[Op_RegI] = TypeInt::INT;
mreg2type[Op_RegP] = TypePtr::BOTTOM;
mreg2type[Op_RegF] = Type::FLOAT;
mreg2type[Op_RegD] = Type::DOUBLE;
mreg2type[Op_RegL] = TypeLong::LONG;
mreg2type[Op_RegFlags] = TypeInt::CC;
GrowableArray<ciInstanceKlass*> array_interfaces;
array_interfaces.push(current->env()->Cloneable_klass());
array_interfaces.push(current->env()->Serializable_klass());
TypeAryPtr::_array_interfaces = TypeInterfaces::make(&array_interfaces);
TypeAryKlassPtr::_array_interfaces = TypeAryPtr::_array_interfaces;
TypeAryPtr::RANGE = TypeAryPtr::make( TypePtr::BotPTR, TypeAry::make(Type::BOTTOM,TypeInt::POS), nullptr /* current->env()->Object_klass() */, false, arrayOopDesc::length_offset_in_bytes());
TypeAryPtr::NARROWOOPS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeNarrowOop::BOTTOM, TypeInt::POS), nullptr /*ciArrayKlass::make(o)*/, false, Type::OffsetBot);
#ifdef _LP64
if (UseCompressedOops) {
assert(TypeAryPtr::NARROWOOPS->is_ptr_to_narrowoop(), "array of narrow oops must be ptr to narrow oop");
TypeAryPtr::OOPS = TypeAryPtr::NARROWOOPS;
} else
#endif
{
// There is no shared klass for Object[]. See note in TypeAryPtr::klass().
TypeAryPtr::OOPS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInstPtr::BOTTOM,TypeInt::POS), nullptr /*ciArrayKlass::make(o)*/, false, Type::OffsetBot);
}
TypeAryPtr::BYTES = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInt::BYTE ,TypeInt::POS), ciTypeArrayKlass::make(T_BYTE), true, Type::OffsetBot);
TypeAryPtr::SHORTS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInt::SHORT ,TypeInt::POS), ciTypeArrayKlass::make(T_SHORT), true, Type::OffsetBot);
TypeAryPtr::CHARS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInt::CHAR ,TypeInt::POS), ciTypeArrayKlass::make(T_CHAR), true, Type::OffsetBot);
TypeAryPtr::INTS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInt::INT ,TypeInt::POS), ciTypeArrayKlass::make(T_INT), true, Type::OffsetBot);
TypeAryPtr::LONGS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeLong::LONG ,TypeInt::POS), ciTypeArrayKlass::make(T_LONG), true, Type::OffsetBot);
TypeAryPtr::FLOATS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(Type::FLOAT ,TypeInt::POS), ciTypeArrayKlass::make(T_FLOAT), true, Type::OffsetBot);
TypeAryPtr::DOUBLES = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(Type::DOUBLE ,TypeInt::POS), ciTypeArrayKlass::make(T_DOUBLE), true, Type::OffsetBot);
// Nobody should ask _array_body_type[T_NARROWOOP]. Use null as assert.
TypeAryPtr::_array_body_type[T_NARROWOOP] = nullptr;
TypeAryPtr::_array_body_type[T_OBJECT] = TypeAryPtr::OOPS;
TypeAryPtr::_array_body_type[T_ARRAY] = TypeAryPtr::OOPS; // arrays are stored in oop arrays
TypeAryPtr::_array_body_type[T_BYTE] = TypeAryPtr::BYTES;
TypeAryPtr::_array_body_type[T_BOOLEAN] = TypeAryPtr::BYTES; // boolean[] is a byte array
TypeAryPtr::_array_body_type[T_SHORT] = TypeAryPtr::SHORTS;
TypeAryPtr::_array_body_type[T_CHAR] = TypeAryPtr::CHARS;
TypeAryPtr::_array_body_type[T_INT] = TypeAryPtr::INTS;
TypeAryPtr::_array_body_type[T_LONG] = TypeAryPtr::LONGS;
TypeAryPtr::_array_body_type[T_FLOAT] = TypeAryPtr::FLOATS;
TypeAryPtr::_array_body_type[T_DOUBLE] = TypeAryPtr::DOUBLES;
TypeInstKlassPtr::OBJECT = TypeInstKlassPtr::make(TypePtr::NotNull, current->env()->Object_klass(), 0);
TypeInstKlassPtr::OBJECT_OR_NULL = TypeInstKlassPtr::make(TypePtr::BotPTR, current->env()->Object_klass(), 0);
const Type **fi2c = TypeTuple::fields(2);
fi2c[TypeFunc::Parms+0] = TypeInstPtr::BOTTOM; // Method*
fi2c[TypeFunc::Parms+1] = TypeRawPtr::BOTTOM; // argument pointer
TypeTuple::START_I2C = TypeTuple::make(TypeFunc::Parms+2, fi2c);
const Type **intpair = TypeTuple::fields(2);
intpair[0] = TypeInt::INT;
intpair[1] = TypeInt::INT;
TypeTuple::INT_PAIR = TypeTuple::make(2, intpair);
const Type **longpair = TypeTuple::fields(2);
longpair[0] = TypeLong::LONG;
longpair[1] = TypeLong::LONG;
TypeTuple::LONG_PAIR = TypeTuple::make(2, longpair);
const Type **intccpair = TypeTuple::fields(2);
intccpair[0] = TypeInt::INT;
intccpair[1] = TypeInt::CC;
TypeTuple::INT_CC_PAIR = TypeTuple::make(2, intccpair);
const Type **longccpair = TypeTuple::fields(2);
longccpair[0] = TypeLong::LONG;
longccpair[1] = TypeInt::CC;
TypeTuple::LONG_CC_PAIR = TypeTuple::make(2, longccpair);
_const_basic_type[T_NARROWOOP] = TypeNarrowOop::BOTTOM;
_const_basic_type[T_NARROWKLASS] = Type::BOTTOM;
_const_basic_type[T_BOOLEAN] = TypeInt::BOOL;
_const_basic_type[T_CHAR] = TypeInt::CHAR;
_const_basic_type[T_BYTE] = TypeInt::BYTE;
_const_basic_type[T_SHORT] = TypeInt::SHORT;
_const_basic_type[T_INT] = TypeInt::INT;
_const_basic_type[T_LONG] = TypeLong::LONG;
_const_basic_type[T_FLOAT] = Type::FLOAT;
_const_basic_type[T_DOUBLE] = Type::DOUBLE;
_const_basic_type[T_OBJECT] = TypeInstPtr::BOTTOM;
_const_basic_type[T_ARRAY] = TypeInstPtr::BOTTOM; // there is no separate bottom for arrays
_const_basic_type[T_VOID] = TypePtr::NULL_PTR; // reflection represents void this way
_const_basic_type[T_ADDRESS] = TypeRawPtr::BOTTOM; // both interpreter return addresses & random raw ptrs
_const_basic_type[T_CONFLICT] = Type::BOTTOM; // why not?
_zero_type[T_NARROWOOP] = TypeNarrowOop::NULL_PTR;
_zero_type[T_NARROWKLASS] = TypeNarrowKlass::NULL_PTR;
_zero_type[T_BOOLEAN] = TypeInt::ZERO; // false == 0
_zero_type[T_CHAR] = TypeInt::ZERO; // '\0' == 0
_zero_type[T_BYTE] = TypeInt::ZERO; // 0x00 == 0
_zero_type[T_SHORT] = TypeInt::ZERO; // 0x0000 == 0
_zero_type[T_INT] = TypeInt::ZERO;
_zero_type[T_LONG] = TypeLong::ZERO;
_zero_type[T_FLOAT] = TypeF::ZERO;
_zero_type[T_DOUBLE] = TypeD::ZERO;
_zero_type[T_OBJECT] = TypePtr::NULL_PTR;
_zero_type[T_ARRAY] = TypePtr::NULL_PTR; // null array is null oop
_zero_type[T_ADDRESS] = TypePtr::NULL_PTR; // raw pointers use the same null
_zero_type[T_VOID] = Type::TOP; // the only void value is no value at all
// get_zero_type() should not happen for T_CONFLICT
_zero_type[T_CONFLICT]= nullptr;
TypeVect::VECTMASK = (TypeVect*)(new TypeVectMask(TypeInt::BOOL, MaxVectorSize))->hashcons();
mreg2type[Op_RegVectMask] = TypeVect::VECTMASK;
if (Matcher::supports_scalable_vector()) {
TypeVect::VECTA = TypeVect::make(T_BYTE, Matcher::scalable_vector_reg_size(T_BYTE));
}
// Vector predefined types, it needs initialized _const_basic_type[].
if (Matcher::vector_size_supported(T_BYTE,4)) {
TypeVect::VECTS = TypeVect::make(T_BYTE,4);
}
if (Matcher::vector_size_supported(T_FLOAT,2)) {
TypeVect::VECTD = TypeVect::make(T_FLOAT,2);
}
if (Matcher::vector_size_supported(T_FLOAT,4)) {
TypeVect::VECTX = TypeVect::make(T_FLOAT,4);
}
if (Matcher::vector_size_supported(T_FLOAT,8)) {
TypeVect::VECTY = TypeVect::make(T_FLOAT,8);
}
if (Matcher::vector_size_supported(T_FLOAT,16)) {
TypeVect::VECTZ = TypeVect::make(T_FLOAT,16);
}
mreg2type[Op_VecA] = TypeVect::VECTA;
mreg2type[Op_VecS] = TypeVect::VECTS;
mreg2type[Op_VecD] = TypeVect::VECTD;
mreg2type[Op_VecX] = TypeVect::VECTX;
mreg2type[Op_VecY] = TypeVect::VECTY;
mreg2type[Op_VecZ] = TypeVect::VECTZ;
// Restore working type arena.
current->set_type_arena(save);
current->set_type_dict(nullptr);
}
//------------------------------Initialize-------------------------------------
void Type::Initialize(Compile* current) {
assert(current->type_arena() != nullptr, "must have created type arena");
if (_shared_type_dict == nullptr) {
Initialize_shared(current);
}
Arena* type_arena = current->type_arena();
// Create the hash-cons'ing dictionary with top-level storage allocation
Dict *tdic = new (type_arena) Dict(*_shared_type_dict, type_arena);
current->set_type_dict(tdic);
}
//------------------------------hashcons---------------------------------------
// Do the hash-cons trick. If the Type already exists in the type table,
// delete the current Type and return the existing Type. Otherwise stick the
// current Type in the Type table.
const Type *Type::hashcons(void) {
debug_only(base()); // Check the assertion in Type::base().
// Look up the Type in the Type dictionary
Dict *tdic = type_dict();
Type* old = (Type*)(tdic->Insert(this, this, false));
if( old ) { // Pre-existing Type?
if( old != this ) // Yes, this guy is not the pre-existing?
delete this; // Yes, Nuke this guy
assert( old->_dual, "" );
return old; // Return pre-existing
}
// Every type has a dual (to make my lattice symmetric).
// Since we just discovered a new Type, compute its dual right now.
assert( !_dual, "" ); // No dual yet
_dual = xdual(); // Compute the dual
if (equals(this, _dual)) { // Handle self-symmetric
if (_dual != this) {
delete _dual;
_dual = this;
}
return this;
}
assert( !_dual->_dual, "" ); // No reverse dual yet
assert( !(*tdic)[_dual], "" ); // Dual not in type system either
// New Type, insert into Type table
tdic->Insert((void*)_dual,(void*)_dual);
((Type*)_dual)->_dual = this; // Finish up being symmetric
#ifdef ASSERT
Type *dual_dual = (Type*)_dual->xdual();
assert( eq(dual_dual), "xdual(xdual()) should be identity" );
delete dual_dual;
#endif
return this; // Return new Type
}
//------------------------------eq---------------------------------------------
// Structural equality check for Type representations
bool Type::eq( const Type * ) const {
return true; // Nothing else can go wrong
}
//------------------------------hash-------------------------------------------
// Type-specific hashing function.
uint Type::hash(void) const {
return _base;
}
//------------------------------is_finite--------------------------------------
// Has a finite value
bool Type::is_finite() const {
return false;
}
//------------------------------is_nan-----------------------------------------
// Is not a number (NaN)
bool Type::is_nan() const {
return false;
}
#ifdef ASSERT
class VerifyMeet;
class VerifyMeetResult : public ArenaObj {
friend class VerifyMeet;
friend class Type;
private:
class VerifyMeetResultEntry {
private:
const Type* _in1;
const Type* _in2;
const Type* _res;
public:
VerifyMeetResultEntry(const Type* in1, const Type* in2, const Type* res):
_in1(in1), _in2(in2), _res(res) {
}
VerifyMeetResultEntry():
_in1(nullptr), _in2(nullptr), _res(nullptr) {
}
bool operator==(const VerifyMeetResultEntry& rhs) const {
return _in1 == rhs._in1 &&
_in2 == rhs._in2 &&
_res == rhs._res;
}
bool operator!=(const VerifyMeetResultEntry& rhs) const {
return !(rhs == *this);
}
static int compare(const VerifyMeetResultEntry& v1, const VerifyMeetResultEntry& v2) {
if ((intptr_t) v1._in1 < (intptr_t) v2._in1) {
return -1;
} else if (v1._in1 == v2._in1) {
if ((intptr_t) v1._in2 < (intptr_t) v2._in2) {
return -1;
} else if (v1._in2 == v2._in2) {
assert(v1._res == v2._res || v1._res == nullptr || v2._res == nullptr, "same inputs should lead to same result");
return 0;
}
return 1;
}
return 1;
}
const Type* res() const { return _res; }
};
uint _depth;
GrowableArray<VerifyMeetResultEntry> _cache;
// With verification code, the meet of A and B causes the computation of:
// 1- meet(A, B)
// 2- meet(B, A)
// 3- meet(dual(meet(A, B)), dual(A))
// 4- meet(dual(meet(A, B)), dual(B))
// 5- meet(dual(A), dual(B))
// 6- meet(dual(B), dual(A))
// 7- meet(dual(meet(dual(A), dual(B))), A)
// 8- meet(dual(meet(dual(A), dual(B))), B)
//
// In addition the meet of A[] and B[] requires the computation of the meet of A and B.
//
// The meet of A[] and B[] triggers the computation of:
// 1- meet(A[], B[][)
// 1.1- meet(A, B)
// 1.2- meet(B, A)
// 1.3- meet(dual(meet(A, B)), dual(A))
// 1.4- meet(dual(meet(A, B)), dual(B))
// 1.5- meet(dual(A), dual(B))
// 1.6- meet(dual(B), dual(A))
// 1.7- meet(dual(meet(dual(A), dual(B))), A)
// 1.8- meet(dual(meet(dual(A), dual(B))), B)
// 2- meet(B[], A[])
// 2.1- meet(B, A) = 1.2
// 2.2- meet(A, B) = 1.1
// 2.3- meet(dual(meet(B, A)), dual(B)) = 1.4
// 2.4- meet(dual(meet(B, A)), dual(A)) = 1.3
// 2.5- meet(dual(B), dual(A)) = 1.6
// 2.6- meet(dual(A), dual(B)) = 1.5
// 2.7- meet(dual(meet(dual(B), dual(A))), B) = 1.8
// 2.8- meet(dual(meet(dual(B), dual(A))), B) = 1.7
// etc.
// The number of meet operations performed grows exponentially with the number of dimensions of the arrays but the number
// of different meet operations is linear in the number of dimensions. The function below caches meet results for the
// duration of the meet at the root of the recursive calls.
//
const Type* meet(const Type* t1, const Type* t2) {
bool found = false;
const VerifyMeetResultEntry meet(t1, t2, nullptr);
int pos = _cache.find_sorted<VerifyMeetResultEntry, VerifyMeetResultEntry::compare>(meet, found);
const Type* res = nullptr;
if (found) {
res = _cache.at(pos).res();
} else {
res = t1->xmeet(t2);
_cache.insert_sorted<VerifyMeetResultEntry::compare>(VerifyMeetResultEntry(t1, t2, res));
found = false;
_cache.find_sorted<VerifyMeetResultEntry, VerifyMeetResultEntry::compare>(meet, found);
assert(found, "should be in table after it's added");
}
return res;
}
void add(const Type* t1, const Type* t2, const Type* res) {
_cache.insert_sorted<VerifyMeetResultEntry::compare>(VerifyMeetResultEntry(t1, t2, res));
}
bool empty_cache() const {
return _cache.length() == 0;
}
public:
VerifyMeetResult(Compile* C) :
_depth(0), _cache(C->comp_arena(), 2, 0, VerifyMeetResultEntry()) {
}
};
void Type::assert_type_verify_empty() const {
assert(Compile::current()->_type_verify == nullptr || Compile::current()->_type_verify->empty_cache(), "cache should have been discarded");
}
class VerifyMeet {
private:
Compile* _C;
public:
VerifyMeet(Compile* C) : _C(C) {
if (C->_type_verify == nullptr) {
C->_type_verify = new (C->comp_arena())VerifyMeetResult(C);
}
_C->_type_verify->_depth++;
}
~VerifyMeet() {
assert(_C->_type_verify->_depth != 0, "");
_C->_type_verify->_depth--;
if (_C->_type_verify->_depth == 0) {
_C->_type_verify->_cache.trunc_to(0);
}
}
const Type* meet(const Type* t1, const Type* t2) const {
return _C->_type_verify->meet(t1, t2);
}
void add(const Type* t1, const Type* t2, const Type* res) const {
_C->_type_verify->add(t1, t2, res);
}
};
void Type::check_symmetrical(const Type* t, const Type* mt, const VerifyMeet& verify) const {
Compile* C = Compile::current();
const Type* mt2 = verify.meet(t, this);
if (mt != mt2) {
tty->print_cr("=== Meet Not Commutative ===");
tty->print("t = "); t->dump(); tty->cr();
tty->print("this = "); dump(); tty->cr();
tty->print("t meet this = "); mt2->dump(); tty->cr();
tty->print("this meet t = "); mt->dump(); tty->cr();
fatal("meet not commutative");
}
const Type* dual_join = mt->_dual;
const Type* t2t = verify.meet(dual_join,t->_dual);
const Type* t2this = verify.meet(dual_join,this->_dual);
// Interface meet Oop is Not Symmetric:
// Interface:AnyNull meet Oop:AnyNull == Interface:AnyNull
// Interface:NotNull meet Oop:NotNull == java/lang/Object:NotNull
if (t2t != t->_dual || t2this != this->_dual) {
tty->print_cr("=== Meet Not Symmetric ===");
tty->print("t = "); t->dump(); tty->cr();
tty->print("this= "); dump(); tty->cr();
tty->print("mt=(t meet this)= "); mt->dump(); tty->cr();
tty->print("t_dual= "); t->_dual->dump(); tty->cr();
tty->print("this_dual= "); _dual->dump(); tty->cr();
tty->print("mt_dual= "); mt->_dual->dump(); tty->cr();
tty->print("mt_dual meet t_dual= "); t2t ->dump(); tty->cr();
tty->print("mt_dual meet this_dual= "); t2this ->dump(); tty->cr();
fatal("meet not symmetric");
}
}
#endif
//------------------------------meet-------------------------------------------
// Compute the MEET of two types. NOT virtual. It enforces that meet is
// commutative and the lattice is symmetric.
const Type *Type::meet_helper(const Type *t, bool include_speculative) const {
if (isa_narrowoop() && t->isa_narrowoop()) {
const Type* result = make_ptr()->meet_helper(t->make_ptr(), include_speculative);
return result->make_narrowoop();
}
if (isa_narrowklass() && t->isa_narrowklass()) {
const Type* result = make_ptr()->meet_helper(t->make_ptr(), include_speculative);
return result->make_narrowklass();
}
#ifdef ASSERT
Compile* C = Compile::current();
VerifyMeet verify(C);
#endif
const Type *this_t = maybe_remove_speculative(include_speculative);
t = t->maybe_remove_speculative(include_speculative);