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OMRNode.hpp
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/*******************************************************************************
* Copyright IBM Corp. and others 2000
*
* This program and the accompanying materials are made available under
* the terms of the Eclipse Public License 2.0 which accompanies this
* distribution and is available at https://www.eclipse.org/legal/epl-2.0/
* or the Apache License, Version 2.0 which accompanies this distribution
* and is available at https://www.apache.org/licenses/LICENSE-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License, v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception [1] and GNU General Public
* License, version 2 with the OpenJDK Assembly Exception [2].
*
* [1] https://www.gnu.org/software/classpath/license.html
* [2] https://openjdk.org/legal/assembly-exception.html
*
* SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0-only WITH Classpath-exception-2.0 OR GPL-2.0-only WITH OpenJDK-assembly-exception-1.0
*******************************************************************************/
#ifndef OMR_NODE_INCL
#define OMR_NODE_INCL
/*
* The following #define and typedef must appear before any #includes in this file
*/
#ifndef OMR_NODE_CONNECTOR
#define OMR_NODE_CONNECTOR
namespace OMR { class Node; }
namespace OMR { typedef OMR::Node NodeConnector; }
#endif
#include <limits.h>
#include <stddef.h>
#include <stdint.h>
#include <string.h>
#include "codegen/RegisterConstants.hpp"
#include "compile/VirtualGuard.hpp"
#include "cs2/hashtab.h"
#include "env/KnownObjectTable.hpp"
#include "env/TRMemory.hpp"
#include "il/DataTypes.hpp"
#include "il/ILOpCodes.hpp"
#include "il/ILOps.hpp"
#include "il/NodeUnions.hpp"
#include "infra/Annotations.hpp"
#include "infra/Assert.hpp"
#include "infra/Flags.hpp"
#include "infra/TRlist.hpp"
class TR_BitVector;
class TR_Debug;
class TR_UseOnlyAliasSetInterface;
class TR_UseDefAliasSetInterface;
class TR_OpaqueClassBlock;
class TR_OpaqueMethodBlock;
class TR_ResolvedMethod;
namespace TR { class AutomaticSymbol; }
namespace TR { class Block; }
namespace TR { class CodeGenerator; }
namespace TR { class Compilation; }
namespace TR { class LabelSymbol; }
namespace TR { class Node; }
namespace TR { class NodePool; }
namespace TR { class Register; }
namespace TR { class Symbol; }
namespace TR { class SymbolReference; }
namespace TR { class TreeTop; }
namespace TR { class NodeExtension; }
namespace TR { class NodeChecklist; }
template <class T> class List;
#define NUM_DEFAULT_CHILDREN 2
/// Node counts
///
typedef uint32_t ncount_t;
#define MAX_NODE_COUNT UINT_MAX
/// Node reference counts
///
typedef uint32_t rcount_t;
#define MAX_RCOUNT UINT_MAX
/// Node local indexes
///
typedef uint32_t scount_t;
#define MAX_SCOUNT UINT_MAX
#define SCOUNT_HIGH_BIT 0x80000000
#define NULL_USEDEF_SYMBOL_INDEX 0xFFFF //TODO: should be 0xFFFF until we change the date type of _localIndex in Symbol.hpp
/// Visit counts
///
/// \def MAX_VCOUNT: max # visit counts that can be consumed before
/// risking incorrect behaviour (ie. hard limit)
/// \def HIGH_VISIT_COUNT: recommended max # visit counts between reset operations (ie. soft limit)
/// \def VCOUNT_HEADROOM: max # visit counts that can be safely consumed
/// between HIGH_VISIT_COUNT checks
///
#define MAX_VCOUNT (USHRT_MAX)
#define VCOUNT_HEADROOM (48000)
#define HIGH_VISIT_COUNT (MAX_VCOUNT-VCOUNT_HEADROOM)
typedef uint16_t vcount_t;
#define TR_MAX_CHARS_FOR_HASH 32
#define TR_DECIMAL_HASH 7
typedef enum
{
NoPrefetch = 0,
PrefetchLoad = 1,
PrefetchLoadL1 = 2,
PrefetchLoadL2 = 3,
PrefetchLoadL3 = 4,
PrefetchLoadNonTemporal = 5,
PrefetchStore = 101,
PrefetchStoreConditional = 102,
PrefetchStoreNonTemporal = 103,
ReleaseStore = 501, ///< Retain for Load
ReleaseAll = 502 ///< Release from cache
} PrefetchType;
namespace OMR
{
class OMR_EXTENSIBLE Node
{
// Forward declarations
public:
class ChildIterator;
private:
/// This operator is declared private and not actually defined;
/// this is a C++ convention to avoid accidental assignment between instances of this class
/// Once we have universal C++11 support, should be changed to use "= delete"
Node & operator=(const TR::Node &);
/**
* Protected constructors and helpers
*/
protected:
Node(TR::Node *originatingByteCodeNode, TR::ILOpCodes op, uint16_t numChildren);
Node(TR::Node *from, uint16_t numChildren = 0);
static void copyValidProperties(TR::Node *fromNode, TR::Node *toNode);
static TR::Node *createInternal(TR::Node *originatingByteCodeNode, TR::ILOpCodes op, uint16_t numChildren, TR::Node *originalNode = 0);
TR_YesNoMaybe computeIsCollectedReferenceImpl(TR::NodeChecklist &processedNodesCollected, TR::NodeChecklist &processedNodesNotCollected);
/**
* Public constructors and helpers
*/
public:
inline TR::Node * self();
Node();
~Node();
void * operator new(size_t s, TR::NodePool & nodePool);
void operator delete(void *node, TR::NodePool& nodes);
void * operator new(size_t s, void *ptr) throw();
void operator delete(void *node, void *ptr) throw();
static TR::Node *copy(TR::Node *);
static TR::Node *copy(TR::Node *, int32_t numChildren);
static TR::Node *recreate(TR::Node *originalNode, TR::ILOpCodes op);
static TR::Node *recreateWithSymRef(TR::Node *originalNode, TR::ILOpCodes op, TR::SymbolReference *newSymRef);
// create methods from everywhere other than the ilGenerator need
// to pass in a TR::Node pointer from which the byte code information will be copied
//
static TR::Node *create(TR::Node *originatingByteCodeNode, TR::ILOpCodes op, uint16_t numChildren = 0);
static TR::Node *create(TR::Node *originatingByteCodeNode, TR::ILOpCodes op, uint16_t numChildren, TR::Node* first);
static TR::Node *create(TR::Node *originatingByteCodeNode, TR::ILOpCodes op, uint16_t numChildren, TR::Node* first, TR::Node* second);
static TR::Node *create(TR::Node *originatingByteCodeNode, TR::ILOpCodes op, uint16_t numChildren, TR::TreeTop * dest);
static TR::Node *create(TR::Node *originatingByteCodeNode, TR::ILOpCodes op, uint16_t numChildren, int32_t intValue, TR::TreeTop * dest = 0);
static TR::Node *createWithSymRef(TR::Node *originatingByteCodeNode, TR::ILOpCodes op, uint16_t numChildren, TR::SymbolReference * symRef);
static TR::Node *createWithSymRef(TR::Node *originatingByteCodeNode, TR::ILOpCodes op, uint16_t numChildren, TR::Node* first, TR::SymbolReference * symRef);
static TR::Node *createOnStack(TR::Node *originatingByteCodeNode, TR::ILOpCodes op, uint16_t numChildren = 0);
static TR::Node *recreateWithoutProperties(TR::Node *originalNode, TR::ILOpCodes op, uint16_t numChildren = 0, TR::SymbolReference * symRef = 0);
static TR::Node *create(TR::ILOpCodes op, uint16_t numChildren = 0);
static TR::Node *create(TR::ILOpCodes op, uint16_t numChildren, TR::TreeTop * dest);
static TR::Node *create(TR::ILOpCodes op, uint16_t numChildren, int32_t intValue, TR::TreeTop * dest = 0);
static TR::Node *createWithSymRef(TR::ILOpCodes op, uint16_t numChildren, TR::Node *first, uintptr_t extraChildren, TR::SymbolReference *symRef);
static TR::Node *createWithSymRef(TR::ILOpCodes op, uint16_t numChildren, TR::Node *first, TR::Node *second, uintptr_t extraChildren, TR::SymbolReference *symRef);
static TR::Node *createWithSymRef(TR::ILOpCodes op, uint16_t numChildren, TR::SymbolReference * symRef);
static TR::Node *createWithSymRef(TR::ILOpCodes op, uint16_t numChildren, TR::SymbolReference * symRef, uintptr_t extraChildrenForFixup);
#if defined(_MSC_VER) || defined(LINUXPPC)
private:
static TR::Node *recreateWithoutSymRef_va_args(TR::Node *originalNode, TR::ILOpCodes op, uint16_t numChildren, uint16_t numChildArgs, va_list &args);
static TR::Node *createWithoutSymRef(TR::ILOpCodes op, uint16_t numChildren, uint16_t numChildArgs, ...);
static TR::Node *recreateWithoutSymRef(TR::Node *originalNode, TR::ILOpCodes op, uint16_t numChildren, uint16_t numChildArgs, ...);
static TR::Node *recreateWithSymRefWithoutProperties(TR::Node *originalNode, TR::ILOpCodes op, uint16_t numChildren, uint16_t numChildArgs, ...);
public:
// only this variadic method is part of the external interface
static TR::Node *createWithSymRef(TR::ILOpCodes op, uint16_t numChildren, uint16_t numChildArgs, ...);
#else // XLC (but not on LINUX PPC) and GCC support the C++11 feature, variadic templates
private:
uint16_t addChildrenAndSymRef(uint16_t lastIndex, TR::SymbolReference *symRef);
uint16_t addChildrenAndSymRef(uint16_t childIndex, TR::Node *child);
template <class...ChildrenAndSymRefType>
uint16_t addChildrenAndSymRef(uint16_t childIndex, TR::Node *child, ChildrenAndSymRefType... childrenAndSymRef);
template <class...ChildrenAndSymRefType>
static TR::Node *recreateWithSymRefWithoutProperties(TR::Node *originalNode, TR::ILOpCodes op, uint16_t numChildren, uint16_t numChildArgs, TR::Node *first, ChildrenAndSymRefType... childrenAndSymRef);
template <class...Children>
static TR::Node *recreateWithoutSymRef(TR::Node *originalNode, TR::ILOpCodes op, uint16_t numChildren, uint16_t numChildArgs, TR::Node *first, Children... children);
template <class...ChildrenAndSymRefType>
static TR::Node *createWithSymRefInternal(TR::ILOpCodes op, uint16_t numChildren, uint16_t numChildArgs, TR::Node *first, ChildrenAndSymRefType... childrenAndSymRef);
template <class...Children>
static TR::Node *createWithoutSymRef(TR::ILOpCodes op, uint16_t numChildren, uint16_t numChildArgs, TR::Node *first, Children... children);
public:
// only this variadic method is part of the external interface
template <class...ChildrenAndSymRefType>
static TR::Node *createWithSymRef(TR::ILOpCodes op, uint16_t numChildren, uint16_t numChildArgs, TR::Node *first, ChildrenAndSymRefType... childrenAndSymRef);
#endif
static TR::Node *create(TR::ILOpCodes op, uint16_t numChildren, TR::Node *first);
static TR::Node *create(TR::ILOpCodes op, uint16_t numChildren, TR::Node *first, TR::Node *second);
static TR::Node *create(TR::ILOpCodes op, uint16_t numChildren, TR::Node *first, TR::Node *second, TR::Node *third);
static TR::Node *create(TR::ILOpCodes op, uint16_t numChildren, TR::Node *first, TR::Node *second, TR::Node *third, TR::Node *fourth);
static TR::Node *create(TR::ILOpCodes op, uint16_t numChildren, TR::Node *first, TR::Node *second, TR::Node *third, TR::Node *fourth, TR::Node *fifth);
static TR::Node *create(TR::ILOpCodes op, uint16_t numChildren, TR::Node *first, TR::Node *second, TR::Node *third, TR::Node *fourth, TR::Node *fifth, TR::Node *sixth);
static TR::Node *create(TR::ILOpCodes op, uint16_t numChildren, TR::Node *first, TR::Node *second, TR::Node *third, TR::Node *fourth, TR::Node *fifth, TR::Node *sixth, TR::Node *seventh);
static TR::Node *create(TR::ILOpCodes op, uint16_t numChildren, TR::Node *first, TR::Node *second, TR::Node *third, TR::Node *fourth, TR::Node *fifth, TR::Node *sixth, TR::Node *seventh, TR::Node *eighth);
static TR::Node *recreateWithoutProperties(TR::Node *originalNode, TR::ILOpCodes op, uint16_t numChildren, TR::Node *first);
static TR::Node *recreateWithoutProperties(TR::Node *originalNode, TR::ILOpCodes op, uint16_t numChildren, TR::Node *first, TR::Node *second);
static TR::Node *recreateWithoutProperties(TR::Node *originalNode, TR::ILOpCodes op, uint16_t numChildren, TR::Node *first, TR::Node *second, TR::Node *third);
static TR::Node *recreateWithoutProperties(TR::Node *originalNode, TR::ILOpCodes op, uint16_t numChildren, TR::Node *first, TR::Node *second, TR::Node *third, TR::Node *fourth);
static TR::Node *recreateWithoutProperties(TR::Node *originalNode, TR::ILOpCodes op, uint16_t numChildren, TR::Node *first, TR::Node *second, TR::Node *third, TR::Node *fourth, TR::Node *fifth);
static TR::Node *recreateWithoutProperties(TR::Node *originalNode, TR::ILOpCodes op, uint16_t numChildren, TR::Node *first, TR::Node *second, TR::Node *third, TR::Node *fourth, TR::Node *fifth, TR::Node *sixth);
static TR::Node *recreateWithoutProperties(TR::Node *originalNode, TR::ILOpCodes op, uint16_t numChildren, TR::Node *first, TR::Node *second, TR::Node *third, TR::Node *fourth, TR::Node *fifth, TR::Node *sixth, TR::Node *seventh);
static TR::Node *recreateWithoutProperties(TR::Node *originalNode, TR::ILOpCodes op, uint16_t numChildren, TR::Node *first, TR::Node *second, TR::Node *third, TR::Node *fourth, TR::Node *fifth, TR::Node *sixth, TR::Node *seventh, TR::Node *eighth);
static TR::Node *recreateWithoutProperties(TR::Node *originalNode, TR::ILOpCodes op, uint16_t numChildren, TR::Node *first, TR::SymbolReference * symRef);
static TR::Node *recreateWithoutProperties(TR::Node *originalNode, TR::ILOpCodes op, uint16_t numChildren, TR::Node *first, TR::Node *second, TR::SymbolReference * symRef);
static TR::Node *recreateWithoutProperties(TR::Node *originalNode, TR::ILOpCodes op, uint16_t numChildren, TR::Node *first, TR::Node *second, TR::Node *third, TR::SymbolReference * symRef);
static TR::Node *recreateWithoutProperties(TR::Node *originalNode, TR::ILOpCodes op, uint16_t numChildren, TR::Node *first, TR::Node *second, TR::Node *third, TR::Node *fourth, TR::SymbolReference * symRef);
static TR::Node *recreateWithoutProperties(TR::Node *originalNode, TR::ILOpCodes op, uint16_t numChildren, TR::Node *first, TR::Node *second, TR::Node *third, TR::Node *fourth, TR::Node *fifth, TR::SymbolReference * symRef);
static TR::Node *recreateWithoutProperties(TR::Node *originalNode, TR::ILOpCodes op, uint16_t numChildren, TR::Node *first, TR::Node *second, TR::Node *third, TR::Node *fourth, TR::Node *fifth, TR::Node *sixth, TR::SymbolReference * symRef);
static TR::Node *recreateWithoutProperties(TR::Node *originalNode, TR::ILOpCodes op, uint16_t numChildren, TR::Node *first, TR::Node *second, TR::Node *third, TR::Node *fourth, TR::Node *fifth, TR::Node *sixth, TR::Node *seventh, TR::SymbolReference * symRef);
static TR::Node *recreateWithoutProperties(TR::Node *originalNode, TR::ILOpCodes op, uint16_t numChildren, TR::Node *first, TR::Node *second, TR::Node *third, TR::Node *fourth, TR::Node *fifth, TR::Node *sixth, TR::Node *seventh, TR::Node *eighth, TR::SymbolReference * symRef);
static TR::Node *createWithRoomForOneMore(TR::ILOpCodes op, uint16_t numChildren, void * symbolRefOrBranchTarget = 0, TR::Node *first = 0, TR::Node *second = 0, TR::Node *third = 0, TR::Node *fourth = 0, TR::Node *fifth = 0);
static TR::Node *createWithRoomForThree(TR::ILOpCodes op, TR::Node *first, TR::Node *second, void * symbolRefOrBranchTarget = 0);
static TR::Node *createWithRoomForFive(TR::ILOpCodes op, TR::Node *first, TR::Node *second, TR::Node *third, TR::Node *fourth, void * symbolRefOrBranchTarget = 0);
static TR::Node *createif(TR::ILOpCodes op, TR::Node *first, TR::Node *second, TR::TreeTop * branchTarget = 0);
static TR::Node *createbranch(TR::ILOpCodes op, TR::Node * first, TR::TreeTop * branchTarget = 0);
static TR::Node *createCase(TR::Node *originatingByteCodeNode, TR::TreeTop *, CASECONST_TYPE = 0);
static TR::Node *createArrayOperation(TR::ILOpCodes arrayOp, TR::Node *first, TR::Node *second, TR::Node * third, TR::Node *fourth = NULL, TR::Node *fifth = NULL);
static TR::Node *createArraycopy();
static TR::Node *createArraycopy(TR::Node *first, TR::Node *second, TR::Node *third);
static TR::Node *createArraycopy(TR::Node *first, TR::Node *second, TR::Node *third, TR::Node *fourth, TR::Node *fifth);
/**
* \brief
* Create a call to potentialOSRPointHelperSymbol, only to be used during ILGen
*
* \parm originatingByteCodeNode
* The node whose bytecode info is used to create the call.
*
* \parm osrInductionOffset
* The offset to be added to the originatingByteCodeNode's bytecode index to get the
* target bytecode index. This is to be stored in _unionBase._osrInductionOffset
*
* \note
* One can not create a potentialOSRPointHelper call and stick it to anywhere in the trees
* without the right exception setup and without the right bookkeeping being in place for
* the call. Preventative checks are required to avoid potential misuses. Due the fact that
* during ILGen the OSR infrastructure may be incomplete, the checks can be done in ILGen are
* different than checks needed after ILGen.
*
* This API does checks required to create the helper in ILGen, thus it is only to be used in
* ILGen.
*/
static TR::Node *createPotentialOSRPointHelperCallInILGen(TR::Node* originatingByteCodeNode, int32_t offset);
/**
* \brief
* Create a call to osrFearPointHelperSymbol
*
* \parm originatingByteCodeNode The node whose bytecode info is used to create the call
*
*/
static TR::Node *createOSRFearPointHelperCall(TR::Node* originatingByteCodeNode);
/**
* \brief
* Create a call to eaEscapeHelperSymbol
*
* \parm originatingByteCodeNode The node whose bytecode info is used to create the call
*/
static TR::Node *createEAEscapeHelperCall(TR::Node *originatingByteCodeNode, int32_t numChildren);
static TR::Node *createLoad(TR::SymbolReference * symRef);
static TR::Node *createLoad(TR::Node *originatingByteCodeNode, TR::SymbolReference *);
static TR::Node *createStore(TR::SymbolReference * symRef, TR::Node * value);
static TR::Node *createStore(TR::SymbolReference * symRef, TR::Node * value, TR::ILOpCodes op);
static TR::Node *createStore(TR::SymbolReference * symRef, TR::Node * value, TR::ILOpCodes op, size_t size);
static TR::Node *createStore(TR::Node *originatingByteCodeNode, TR::SymbolReference * symRef, TR::Node * value);
static TR::Node *createRelative32BitFenceNode(void * relocationAddress);
static TR::Node *createRelative32BitFenceNode(TR::Node *originatingByteCodeNode, void *);
static TR::Node *createAddressNode(TR::Node *originatingByteCodeNode, TR::ILOpCodes op, uintptr_t address);
static TR::Node *createAddressNode(TR::Node *originatingByteCodeNode, TR::ILOpCodes op, uintptr_t address, uint8_t precision);
static TR::Node *createAllocationFence(TR::Node *originatingByteCodeNode, TR::Node *fenceNode);
static TR::Node *bconst(TR::Node *originatingByteCodeNode, int8_t val);
static TR::Node *bconst(int8_t val);
static TR::Node *sconst(TR::Node *originatingByteCodeNode, int16_t val);
static TR::Node *sconst(int16_t val);
static TR::Node *iconst(TR::Node *originatingByteCodeNode, int32_t val);
static TR::Node *iconst(int32_t val);
static TR::Node *lconst(TR::Node *originatingByteCodeNode, int64_t val);
static TR::Node *lconst(int64_t val);
static TR::Node *aconst(TR::Node *originatingByteCodeNode, uintptr_t val);
static TR::Node *aconst(TR::Node *originatingByteCodeNode, uintptr_t val, uint8_t precision);
static TR::Node *aconst(uintptr_t val);
static TR::Node *createConstZeroValue(TR::Node *originatingByteCodeNode, TR::DataType dt);
static TR::Node *createConstOne(TR::Node *originatingByteCodeNode, TR::DataType dt);
static TR::Node *createConstDead(TR::Node *originatingByteCodeNode, TR::DataType dt, intptr_t extraData=0);
static TR::Node *createCompressedRefsAnchor(TR::Node *firstChild);
static TR::Node *createAddConstantToAddress(TR::Node * addr, intptr_t value, TR::Node * parent = NULL);
static TR::Node *createLiteralPoolAddress(TR::Node *node, size_t offset);
/**
* Private constructor helpers
*/
private:
void copyChildren(TR::Node *from, uint16_t numChildren = 0, bool forNodeExtensionOnly = false);
static TR::Node *recreateAndCopyValidPropertiesImpl(TR::Node *originalNode, TR::ILOpCodes op, TR::SymbolReference *newSymRef);
static bool isLegalCallToCreate(TR::ILOpCodes opvalue)
{
TR::ILOpCode opcode; opcode.setOpCodeValue(opvalue);
TR_ASSERT(!opcode.isIf(), "use createif or createbranch on this node\n");
TR_ASSERT(opvalue != TR::arraycopy, "use createArraycopy to create this node");
return true;
}
/**
* Public functions
*/
public:
/** @return true if n is one of the children of this node, return false otherwise */
bool hasChild(TR::Node *searchNode);
void addChildren(TR::Node ** extraChildren, uint16_t num);
TR::Node * setValueChild(TR::Node *child);
TR::Node * setAndIncChild(int32_t c, TR::Node * p);
TR::Node * setAndIncValueChild(TR::Node *child);
TR::Node * getValueChild();
TR::Node * getAndDecChild(int32_t c);
TR::Node * duplicateTree(bool duplicateChildren = true);
TR::Node * duplicateTreeForCodeMotion();
TR::Node * duplicateTreeWithCommoning(TR::Allocator allocator);
TR::Node * duplicateTree_DEPRECATED(bool duplicateChildren = true);
bool isUnsafeToDuplicateAndExecuteAgain(int32_t *nodeVisitBudget);
/// uncommonChild changes
/// parent
/// =>this
/// to:
/// parent
/// clone(this)
/// ...
///
void uncommonChild(int32_t childIndex);
/// creates clone, and adjusts reference counts of clone, node and its children
/// as though the node had been uncommoned from its parent.
///
/// returns the uncommoned clone.
///
TR::Node * uncommon();
bool containsNode(TR::Node *searchNode, vcount_t visitCount); // Careful how you use this: it doesn't account for aliasing
/// Does this node have an unresolved symbol reference?
bool hasUnresolvedSymbolReference();
/// Does this node have a non-transparent symbol reference by any chance?
bool mightHaveNonTransparentSymbolReference();
/// Is this node the 'this' pointer?
bool isThisPointer();
/// Whether this node is high part of a "dual", in DAG representation a dual
/// is a composite operator, made from a high order part and its adjunct operator
/// which is its third child. It returns true if the node has the form:
///
/// highOp
/// firstChild
/// secondChild
/// adjunctOp
/// pairFirstChild
/// pairSecondChild
///
/// and the opcodes for highOp/adjunctOp are lumulh/lmul, luaddh/ladd, or lusubh/lsub.
///
bool isDualHigh();
/// Whether this node is high part of a select subtract or addition, like a dual this
/// is a composite operator, made from a high order part and its adjunct operator
/// which is the first child of its third child. It returns true if the node has the form:
///
/// highOp
/// firstChild
/// secondChild
/// computeCC
/// adjunctOp
/// pairFirstChild
/// pairSecondChild
///
/// and the opcodes for highOp/adjunctOp are luaddc/ladd, or lusubb/lsub.
///
bool isSelectHigh();
/// isTernaryHigh is now deprecated. Use isSelectHigh instead.
///
bool isTernaryHigh();
/// Whether this node is the high or low part of a "dual", in cyclic representation.
/// ie it represents a composite operator, together with its pair.
/// The node and its pair have each other as its third child, completing the cycle.
/// It returns true if the node has the form:
///
/// node
/// firstChild
/// secondChild
/// pair
/// pairFirstChild
/// pairSecondChild
/// ==> node
///
bool isDualCyclic();
bool isConstZeroBytes();
bool isConstZeroValue();
bool safeToDoRecursiveDecrement();
/// Is this node a GC safe point
bool canGCandReturn();
bool canGCandExcept();
bool canCauseGC();
bool isGCSafePointWithSymRef();
bool dontEliminateStores(bool isForLocalDeadStore = false);
bool isNotCollected();
bool computeIsInternalPointer();
bool computeIsCollectedReference();
bool addressPointsAtObject();
/**
* @brief Answers whether the act of evaluating this node will
* require a register pair (two registers) to hold the
* result.
* @param comp, the TR::Compilation object
* @return true if two registers are required; false otherwise
*/
bool requiresRegisterPair(TR::Compilation *comp);
/// Decide whether it is safe to replace the next reference to this node with
/// a copy of the node, i.e. make sure it is not killed between the first
/// reference and the next reference.
/// The treetop containing the first reference is provided by the caller.
bool isSafeToReplaceNode(TR::TreeTop *curTreeTop);
bool isl2aForCompressedArrayletLeafLoad();
/// Returns true if the node kills the symbol reference
bool mayModifyValue(TR::SymbolReference *);
/// Returns true if the node performs a memory access with non-transparent memory semantics
bool performsNonTransparentAccess(vcount_t visitCount);
bool uses64BitGPRs();
bool isRematerializable(TR::Node *parent, bool onlyConsiderOpCode);
bool isDoNotPropagateNode();
bool containsDoNotPropagateNode(vcount_t vc);
bool anchorConstChildren();
bool isFloatToFixedConversion();
bool isZeroExtension();
bool isPureCall();
bool isClassUnloadingConst();
/**
* \brief
* Return true if the node is a load of static final field
*/
bool isLoadOfStaticFinalField();
/**
* \brief
* Return true if the node is a call with osrFearPointHelperSymbol
*/
bool isOSRFearPointHelperCall();
/**
* \brief
* Return true if the node is a call with potentialOSRPointHelperSymbol
*/
bool isPotentialOSRPointHelperCall();
/**
* \brief
* Return true if the node is a call with eaEscapeHelperSymbol
*/
bool isEAEscapeHelperCall();
/**
* \brief
* Creates a node for storing into an address field of an object
*
* \parm comp
* Compilation object
*
* \parm obj
* Node containing object reference
*
* \parm symRef
* Symbol reference of the address field
*
* \parm value
* Value to store
*
* \return
* Created node
*
*/
static TR::Node * storeToAddressField(TR::Compilation *comp, TR::Node *obj, TR::SymbolReference *symRef, TR::Node *value);
TR_YesNoMaybe hasBeenRun();
/// Given a monenter node, return the persistent class identifer that's being synchronized
TR_OpaqueClassBlock * getMonitorClass(TR_ResolvedMethod *);
TR_OpaqueClassBlock * getMonitorClassInNode();
void setMonitorClassInNode(TR_OpaqueClassBlock *);
// Given that this is a NULLCHK node, find the reference that is being checked.
TR::Node * getNullCheckReference();
void setNullCheckReference(TR::Node *refNode);
/// getFirstArgumentIndex returns the child index where the arguments start for a call node.
/// For an indirect call the first child may be the vft.
int32_t getFirstArgumentIndex();
inline int32_t getNumArguments();
inline TR::Node * getArgument(int32_t index);
inline TR::Node * getFirstArgument();
uint32_t getSize();
uint32_t getRoundedSize();
uint32_t getNumberOfSlots();
int32_t getMaxIntegerPrecision();
uint16_t getCaseIndexUpperBound();
/// Find the store node (if any) represented by this node or its child
TR::Node * getStoreNode();
TR::TreeTop * getVirtualCallTreeForGuard();
TR::Node * getVirtualCallNodeForGuard();
TR_OpaqueMethodBlock * getOwningMethod();
/** \brief
* Used to get the ram method from the Bytecode Info.
*
* \param *comp
* _compilation of type TR::Compilation
*
* @return
* Returns the ram method (TR_OpaqueMethodBlock) from function call getOwningMethod(TR::Compilation *comp, TR_ByteCodeInfo &bcInfo)
*/
TR_OpaqueMethodBlock* getOwningMethod(TR::Compilation *comp);
/** \brief
* Used to get the ram method from the Bytecode Info.
*
* \param *comp
* _compilation of type TR::Compilation
*
* \param &bcInfo
* _byteCodeInfo of a node of type TR::Node
*
* @return
* Returns the ram method (TR_OpaqueMethodBlock)
*/
static TR_OpaqueMethodBlock* getOwningMethod(TR::Compilation *comp, TR_ByteCodeInfo &bcInfo);
inline TR::DataType getType();
// TODO: Sink into J9. Depends on OMR::Compilation::getMethodFromNode
void * getAOTMethod();
/**
* @return the signature of the node's type if applicable.
* @note the signature's storage may have been created on the stack!
*/
const char * getTypeSignature(int32_t &, TR_AllocationKind = stackAlloc);
// 'Value' can change as a result of modification
void notifyChangeToValueOfNode();
void reverseBranch(TR::TreeTop *newDest);
void devirtualizeCall(TR::TreeTop *treeTop);
bool nodeMightKillCondCode();
void gatherAllNodesWhichMightKillCondCode(vcount_t vc, TR::list<TR::Node *> &nodesWhichKillCondCode);
TR::TreeTop * extractTheNullCheck(TR::TreeTop *);
int32_t countNumberOfNodesInSubtree(vcount_t);
/// Which exceptions can this node cause to be thrown?
uint32_t exceptionsRaised();
/// Has the expression represented by this node ever been executed? Could be
/// determined from such evidence as profile-directed feedback for a static
/// compiler, or runtime instrumentation for a dynamic compiler.
///
TR::Node * skipConversions();
TR::Node * createLongIfNeeded();
TR::TreeTop * createStoresForVar(TR::SymbolReference * &nodeRef, TR::TreeTop *insertBefore, bool simpleRef = false);
void printFullSubtree();
const char * getName(TR_Debug *);
bool isReferenceArrayCopy();
bool chkReferenceArrayCopy();
// CS2 Alias Interface:
// implemented in base/AliasSetInterface.hpp right now.
inline TR_UseOnlyAliasSetInterface mayUse();
inline TR_UseDefAliasSetInterface mayKill(bool gcSafe = false);
/** \brief
* Determines whether this node should be sign/zero extended to 32-bit at the point of evaluation (source) by
* checking for the signExtendTo32BitAtSource or zeroExtendTo32BitAtSource flags.
*/
bool isExtendedTo32BitAtSource();
/** \brief
* Determines whether this node should be sign/zero extended to 64-bit at the point of evaluation (source) by
* checking for the signExtendTo64BitAtSource or zeroExtendTo64BitAtSource flags.
*/
bool isExtendedTo64BitAtSource();
/** \brief
* Determines whether this node should be sign extended at the point of evaluation (source) by checking for the
* signExtendTo32BitAtSource or signExtendTo64BitAtSource flags.
*/
bool isSignExtendedAtSource();
/** \brief
* Determines whether this node should be zero extended at the point of evaluation (source) by checking for the
* zeroExtendTo32BitAtSource or zeroExtendTo64BitAtSource flags.
*/
bool isZeroExtendedAtSource();
/** \brief
* Determines whether this node should be sign extended to 32-bits at the point of evaluation (source).
*/
bool isSignExtendedTo32BitAtSource();
/** \brief
* Determines whether this node should be sign extended to 64-bits at the point of evaluation (source).
*/
bool isSignExtendedTo64BitAtSource();
/** \brief
* Marks the load with the signExtendTo32BitAtSource flag.
*
* \param b
* Determines whether the respective flag should be active.
*/
void setSignExtendTo32BitAtSource(bool b);
/** \brief
* Marks the load with the signExtendTo64BitAtSource flag.
*
* \param b
* Determines whether the respective flag should be active.
*/
void setSignExtendTo64BitAtSource(bool b);
/** \brief
* Determines whether this node should be zero extended to 32-bits at the point of evaluation (source).
*/
bool isZeroExtendedTo32BitAtSource();
/** \brief
* Determines whether this node should be sign extended to 64-bits at the point of evaluation (source).
*/
bool isZeroExtendedTo64BitAtSource();
/** \brief
* Marks the load with the zeroExtendTo32BitAtSource flag.
*
* \param b
* Determines whether the respective flag should be active.
*/
void setZeroExtendTo32BitAtSource(bool b);
/** \brief
* Marks the load with the zeroExtendTo32BitAtSource flag.
*
* \param b
* Determines whether the respective flag should be active.
*/
void setZeroExtendTo64BitAtSource(bool b);
/**
* Node field functions
*/
TR::ILOpCode& getOpCode() { return _opCode; }
TR::ILOpCodes getOpCodeValue() { return _opCode.getOpCodeValue(); }
uint16_t getNumChildren() { return _numChildren; }
uint16_t setNumChildren(uint16_t num) { return ( _numChildren = num); }
ncount_t getGlobalIndex() { return _globalIndex; }
void setGlobalIndex(ncount_t i) { _globalIndex = i; }
flags32_t getFlags() { return _flags; }
void setFlags(flags32_t f);
TR_ByteCodeInfo& getByteCodeInfo() { return _byteCodeInfo; }
void setByteCodeInfo(const TR_ByteCodeInfo &bcInfo);
void copyByteCodeInfo(TR::Node * from);
uint32_t getByteCodeIndex();
void setByteCodeIndex(uint32_t);
int16_t getInlinedSiteIndex();
void setInlinedSiteIndex(int16_t);
TR::Node* setChild(int32_t c, TR::Node * p);
inline TR::Node * getChild(int32_t c);
TR::Node* setFirst(TR::Node * p);
TR::Node* setSecond(TR::Node * p);
inline TR::Node * getFirstChild();
inline TR::Node * getSecondChild();
inline TR::Node * getThirdChild();
inline TR::Node * getLastChild();
void swapChildren();
TR::Node * removeChild(int32_t);
TR::Node * removeLastChild();
void removeAllChildren();
void rotateChildren(int32_t first, int32_t last); ///< @note when finsihed, last child ends up where first child used to be
TR::Node * findChild(TR::ILOpCodes opcode, bool isReversed = false);
int32_t findChildIndex(TR::Node * child);
int32_t countChildren(TR::ILOpCodes opcode);
/// Return an iterator for the children of this node.
inline ChildIterator childIterator(int32_t startIndex=0);
/**
* Node field functions end
*/
/**
* OptAttributes functions
*/
inline vcount_t getVisitCount();
inline vcount_t setVisitCount(vcount_t vc);
inline vcount_t incVisitCount();
void resetVisitCounts(vcount_t t); ///< reset visit counts on this node and all its children
inline rcount_t getReferenceCount();
inline rcount_t setReferenceCount(rcount_t rc);
inline rcount_t incReferenceCount();
inline rcount_t decReferenceCount();
// Decrement the reference count and if it reaches zero decrement the counts of all the children
rcount_t recursivelyDecReferenceCount();
void recursivelyDecReferenceCountFromCodeGen();
inline scount_t getLocalIndex();
inline scount_t setLocalIndex(scount_t li);
inline scount_t incLocalIndex();
inline scount_t decLocalIndex();
/**
* @brief Sets a known object index on this node
* @param[in] koi : the known object index
*/
void setKnownObjectIndex(TR::KnownObjectTable::Index koi) { _knownObjectIndex = koi; }
/**
* @brief Retrieve the known object index associated with this node, if any.
* @return Known object index, or TR::KnownObjectTable::UNKNOWN if none.
*/
TR::KnownObjectTable::Index getKnownObjectIndex() { return _knownObjectIndex; }
/**
* @brief Inquires whether this node has a known object index associated with it.
* @return true if a known object index is cached; false otherwise.
*/
bool hasKnownObjectIndex() { return _knownObjectIndex != TR::KnownObjectTable::UNKNOWN; }
inline scount_t getFutureUseCount();
inline scount_t setFutureUseCount(scount_t li);
inline scount_t incFutureUseCount();
inline scount_t decFutureUseCount();
void initializeFutureUseCounts(vcount_t visitCount);
void setIsNotRematerializeable();
bool isRematerializeable();
inline uint16_t getUseDefIndex();
inline uint16_t setUseDefIndex(uint16_t udi);
TR::Register * getRegister();
TR::Register * setRegister(TR::Register *reg);
void * unsetRegister();
int32_t getEvaluationPriority(TR::CodeGenerator *cg);
int32_t setEvaluationPriority(int32_t p);
/**
* OptAttributes functions end
*/
/**
* UnionBase functions
*/
// These three methods should be used only if you're sure you can't use one of the other ones.
inline int32_t getOSRInductionOffset();
inline int32_t setOSRInductionOffset(int32_t offset);
inline int64_t getConstValue();
inline uint64_t getUnsignedConstValue();
inline void setConstValue(int64_t val);
inline int64_t getLongInt();
inline int64_t setLongInt(int64_t li);
inline int32_t getLongIntLow();
inline int32_t getLongIntHigh();
inline uint64_t getUnsignedLongInt();
inline uint64_t setUnsignedLongInt(uint64_t uli);
inline uint32_t getUnsignedLongIntLow();
inline uint32_t getUnsignedLongIntHigh();
inline int32_t getInt();
inline int32_t setInt(int32_t i);
inline uint32_t getUnsignedInt();
inline uint32_t setUnsignedInt(uint32_t ui);
inline int16_t getShortInt();
inline int16_t setShortInt(int16_t si);
inline uint16_t getUnsignedShortInt();
inline uint16_t setUnsignedShortInt(uint16_t c);
inline int8_t getByte();
inline int8_t setByte(int8_t b);
inline uint8_t getUnsignedByte();
inline uint8_t setUnsignedByte(uint8_t b);
inline float getFloat();
inline float setFloat(float f);
inline uint32_t setFloatBits(uint32_t f);
inline uint32_t getFloatBits();
inline double getDouble();
inline double setDouble(double d);
inline uint64_t getDoubleBits();
inline uint64_t setDoubleBits(uint64_t d);
inline uint64_t getAddress();
inline uint64_t setAddress(uint64_t a);
template <typename T> inline T getConst();
template <typename T> inline T setConst(T t);
template <class T> inline T getIntegerNodeValue();
bool canGet32bitIntegralValue();
int32_t get32bitIntegralValue();
bool canGet64bitIntegralValue();
int64_t get64bitIntegralValue();
void set64bitIntegralValue(int64_t);
uint64_t get64bitIntegralValueAsUnsigned();
TR::Node * getAllocation();
TR::Node * setAllocation(TR::Node * p);
/*
* This function is public to support the TR::UnionedWithChildren::*
* functions that use it extensively. At the moment however, the extension
* interface is limited to Node subclasses, so this function ends up
* being public.
*/
void freeExtensionIfExists();
TR::DataType getArrayCopyElementType();
void setArrayCopyElementType(TR::DataType type);
TR_OpaqueClassBlock * getArrayStoreClassInNode();
void setArrayStoreClassInNode(TR_OpaqueClassBlock *o);
TR_OpaqueClassBlock * getArrayComponentClassInNode();
void setArrayComponentClassInNode(TR_OpaqueClassBlock *c);
struct ArrayStoreCheckInfo
{
TR_OpaqueClassBlock *objectClass;
TR_OpaqueClassBlock *arrayComponentClass;
};
bool hasArrayStoreCheckInfo();
void createArrayStoreCheckInfo();
TR_OpaqueMethodBlock * getMethod();
void setMethod(TR_OpaqueMethodBlock *method);
// Get/set the label symbol associated with a BBStart node
TR::LabelSymbol * getLabel();
TR::LabelSymbol * setLabel(TR::LabelSymbol *lab);
TR_GlobalRegisterNumber getGlobalRegisterNumber();
TR_GlobalRegisterNumber setGlobalRegisterNumber(TR_GlobalRegisterNumber i);
TR_GlobalRegisterNumber getLowGlobalRegisterNumber();
TR_GlobalRegisterNumber setLowGlobalRegisterNumber(TR_GlobalRegisterNumber i);
TR_GlobalRegisterNumber getHighGlobalRegisterNumber();
TR_GlobalRegisterNumber setHighGlobalRegisterNumber(TR_GlobalRegisterNumber i);
size_t getLiteralPoolOffset();
size_t setLiteralPoolOffset(size_t offset, size_t size);
void * getRelocationDestination(uint32_t n);
void * setRelocationDestination(uint32_t n, void * p);
uint32_t getRelocationType();
uint32_t setRelocationType(uint32_t r);
uint32_t getNumRelocations();
uint32_t setNumRelocations(uint32_t n);