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OMRRegisterDependency.hpp
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OMRRegisterDependency.hpp
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/*******************************************************************************
* Copyright (c) 2000, 2021 IBM Corp. and others
*
* 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 http://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] http://openjdk.java.net/legal/assembly-exception.html
*
* SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0 WITH Classpath-exception-2.0 OR LicenseRef-GPL-2.0 WITH Assembly-exception
*******************************************************************************/
#ifndef OMR_X86_REGISTER_DEPENDENCY_INCL
#define OMR_X86_REGISTER_DEPENDENCY_INCL
/*
* The following #define and typedef must appear before any #includes in this file
*/
#ifndef OMR_REGISTER_DEPENDENCY_CONNECTOR
#define OMR_REGISTER_DEPENDENCY_CONNECTOR
namespace OMR { namespace X86 { class RegisterDependencyConditions; } }
namespace OMR { typedef OMR::X86::RegisterDependencyConditions RegisterDependencyConditionsConnector; }
#else
#error OMR::X86::RegisterDependencyConditions expected to be a primary connector, but a OMR connector is already defined
#endif
#ifndef OMR_REGISTER_DEPENDENCY_GROUP_CONNECTOR
#define OMR_REGISTER_DEPENDENCY_GROUP_CONNECTOR
namespace OMR { namespace X86 { class RegisterDependencyGroup; } }
namespace OMR { typedef OMR::X86::RegisterDependencyGroup RegisterDependencyGroupConnector; }
#endif
#include "compiler/codegen/OMRRegisterDependency.hpp"
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include "codegen/CodeGenerator.hpp"
#include "codegen/RealRegister.hpp"
#include "codegen/Register.hpp"
#include "codegen/RegisterConstants.hpp"
#include "codegen/RegisterDependencyStruct.hpp"
#include "env/TRMemory.hpp"
#include "infra/Assert.hpp"
namespace TR { class Instruction; }
namespace TR { class Node; }
namespace TR { class RegisterDependencyConditions; }
template <typename ListKind> class List;
namespace OMR
{
namespace X86
{
class RegisterDependencyGroup : public OMR::RegisterDependencyGroup
{
bool _mayNeedToPopFPRegisters;
bool _needToClearFPStack;
public:
RegisterDependencyGroup()
: _mayNeedToPopFPRegisters(false),
_needToClearFPStack(false)
{}
void setDependencyInfo(uint32_t index,
TR::Register *vr,
TR::RealRegister::RegNum rr,
TR::CodeGenerator *cg,
uint8_t flag = UsesDependentRegister,
bool isAssocRegDependency = false);
TR::RegisterDependency *findDependency(TR::Register *vr, uint32_t stop)
{
TR::RegisterDependency *result = NULL;
for (uint32_t i=0; !result && (i < stop); i++)
if (_dependencies[i].getRegister() == vr)
result = _dependencies+i;
return result;
}
TR::RegisterDependency *findDependency(TR::RealRegister::RegNum rr, uint32_t stop)
{
TR::RegisterDependency *result = NULL;
for (uint32_t i=0; !result && (i < stop); i++)
if (_dependencies[i].getRealRegister() == rr)
result = _dependencies+i;
return result;
}
void assignRegisters(TR::Instruction *currentInstruction,
TR_RegisterKinds kindsToBeAssigned,
uint32_t numberOfRegisters,
TR::CodeGenerator *cg);
void assignFPRegisters(TR::Instruction *currentInstruction,
TR_RegisterKinds kindsToBeAssigned,
uint32_t numberOfRegisters,
TR::CodeGenerator *cg);
void setMayNeedToPopFPRegisters(bool b) {_mayNeedToPopFPRegisters = b;}
bool getMayNeedToPopFPRegisters() {return _mayNeedToPopFPRegisters;}
void setNeedToClearFPStack(bool b) {_needToClearFPStack = b;}
bool getNeedToClearFPStack() {return _needToClearFPStack;}
void blockRealDependencyRegisters(uint32_t numberOfRegisters, TR::CodeGenerator *cg);
void unblockRealDependencyRegisters(uint32_t numberOfRegisters, TR::CodeGenerator *cg);
};
class RegisterDependencyConditions: public OMR::RegisterDependencyConditions
{
TR::RegisterDependencyGroup *_preConditions;
TR::RegisterDependencyGroup *_postConditions;
uint16_t _numPreConditions;
uint16_t _addCursorForPre;
uint16_t _numPostConditions;
uint16_t _addCursorForPost;
uint32_t unionDependencies(TR::RegisterDependencyGroup *deps, uint32_t cursor, TR::Register *vr, TR::RealRegister::RegNum rr, TR::CodeGenerator *cg, uint8_t flag, bool isAssocRegDependency);
uint32_t unionRealDependencies(TR::RegisterDependencyGroup *deps, uint32_t cursor, TR::Register *vr, TR::RealRegister::RegNum rr, TR::CodeGenerator *cg, uint8_t flag, bool isAssocRegDependency);
public:
TR_ALLOC(TR_Memory::RegisterDependencyConditions)
RegisterDependencyConditions()
: _preConditions(NULL),
_postConditions(NULL),
_numPreConditions(0),
_addCursorForPre(0),
_numPostConditions(0),
_addCursorForPost(0)
{}
RegisterDependencyConditions(uint16_t numPreConds, uint16_t numPostConds, TR_Memory * m);
RegisterDependencyConditions(TR::Node *node, TR::CodeGenerator *cg, uint16_t additionalRegDeps = 0, List<TR::Register> * = 0);
void unionNoRegPostCondition(TR::Register *reg, TR::CodeGenerator *cg);
TR::RegisterDependencyConditions *clone(TR::CodeGenerator *cg, uint32_t additionalRegDeps = 0);
TR::RegisterDependencyGroup *getPreConditions() {return _preConditions;}
void setMayNeedToPopFPRegisters(bool b);
void setNeedToClearFPStack(bool b);
uint32_t getNumPreConditions() {return _numPreConditions;}
uint32_t setNumPreConditions(uint32_t n, TR_Memory * m);
uint32_t getNumPostConditions() {return _numPostConditions;}
uint32_t setNumPostConditions(uint32_t n, TR_Memory * m);
uint32_t getAddCursorForPre() {return _addCursorForPre;}
uint32_t setAddCursorForPre(uint32_t a) {return (_addCursorForPre = a);}
uint32_t getAddCursorForPost() {return _addCursorForPost;}
uint32_t setAddCursorForPost(uint32_t a) {return (_addCursorForPost = a);}
void addPreCondition(TR::Register *vr,
TR::RealRegister::RegNum rr,
TR::CodeGenerator *cg,
uint8_t flag = UsesDependentRegister,
bool isAssocRegDependency = false)
{
uint32_t newCursor = unionRealDependencies(_preConditions, _addCursorForPre, vr, rr, cg, flag, isAssocRegDependency);
TR_ASSERT(newCursor <= _numPreConditions, "Too many dependencies");
if (newCursor == _addCursorForPre)
_numPreConditions--; // A vmThread/ebp dependency was displaced, so there is now one less condition.
else
_addCursorForPre = newCursor;
}
void unionPreCondition(TR::Register *vr,
TR::RealRegister::RegNum rr,
TR::CodeGenerator *cg,
uint8_t flag = UsesDependentRegister,
bool isAssocRegDependency = false)
{
uint32_t newCursor = unionDependencies(_preConditions, _addCursorForPre, vr, rr, cg, flag, isAssocRegDependency);
TR_ASSERT(newCursor <= _numPreConditions, "Too many dependencies");
if (newCursor == _addCursorForPre)
_numPreConditions--; // A union occurred, so there is now one less condition
else
_addCursorForPre = newCursor;
}
TR::RegisterDependencyGroup *getPostConditions() {return _postConditions;}
void addPostCondition(TR::Register *vr,
TR::RealRegister::RegNum rr,
TR::CodeGenerator *cg,
uint8_t flag = UsesDependentRegister,
bool isAssocRegDependency = false)
{
uint32_t newCursor = unionRealDependencies(_postConditions, _addCursorForPost, vr, rr, cg, flag, isAssocRegDependency);
TR_ASSERT(newCursor <= _numPostConditions, "Too many dependencies");
if (newCursor == _addCursorForPost)
_numPostConditions--; // A vmThread/ebp dependency was displaced, so there is now one less condition.
else
_addCursorForPost = newCursor;
}
void unionPostCondition(TR::Register *vr,
TR::RealRegister::RegNum rr,
TR::CodeGenerator *cg,
uint8_t flag = UsesDependentRegister,
bool isAssocRegDependency = false)
{
uint32_t newCursor = unionDependencies(_postConditions, _addCursorForPost, vr, rr, cg, flag, isAssocRegDependency);
TR_ASSERT(newCursor <= _numPostConditions, "Too many dependencies");
if (newCursor == _addCursorForPost)
_numPostConditions--; // A union occurred, so there is now one less condition
else
_addCursorForPost = newCursor;
}
TR::RegisterDependency *findPreCondition (TR::Register *vr);
TR::RegisterDependency *findPostCondition(TR::Register *vr);
TR::RegisterDependency *findPreCondition (TR::RealRegister::RegNum rr);
TR::RegisterDependency *findPostCondition(TR::RealRegister::RegNum rr);
void assignPreConditionRegisters(TR::Instruction *currentInstruction, TR_RegisterKinds kindsToBeAssigned, TR::CodeGenerator *cg);
void assignPostConditionRegisters(TR::Instruction *currentInstruction, TR_RegisterKinds kindsToBeAssigned, TR::CodeGenerator *cg);
void blockPreConditionRegisters();
void unblockPreConditionRegisters();
void blockPostConditionRegisters();
void unblockPostConditionRegisters();
void blockPostConditionRealDependencyRegisters(TR::CodeGenerator *cg);
void unblockPostConditionRealDependencyRegisters(TR::CodeGenerator *cg);
void blockPreConditionRealDependencyRegisters(TR::CodeGenerator *cg);
void unblockPreConditionRealDependencyRegisters(TR::CodeGenerator *cg);
// All conditions are added - set the number of conditions to be the number
// currently added
//
void stopAddingPreConditions()
{
_numPreConditions = _addCursorForPre;
}
void stopAddingPostConditions()
{
_numPostConditions = _addCursorForPost;
}
void stopAddingConditions()
{
stopAddingPreConditions();
stopAddingPostConditions();
}
void createRegisterAssociationDirective(TR::Instruction *instruction, TR::CodeGenerator *cg);
TR::RealRegister *getRealRegisterFromVirtual(TR::Register *virtReg, TR::CodeGenerator *cg);
bool refsRegister(TR::Register *r);
bool defsRegister(TR::Register *r);
bool usesRegister(TR::Register *r);
void useRegisters(TR::Instruction *instr, TR::CodeGenerator *cg);
#if defined(DEBUG) || defined(PROD_WITH_ASSUMES)
uint32_t numReferencedGPRegisters(TR::CodeGenerator *);
uint32_t numReferencedFPRegisters(TR::CodeGenerator *);
void printFullRegisterDependencyInfo(FILE *pOutFile);
void printDependencyConditions(TR::RegisterDependencyGroup *conditions,
uint32_t numConditions,
char *prefix,
FILE *pOutFile);
#endif
};
}
}
////////////////////////////////////////////////////
// Generate Routines
////////////////////////////////////////////////////
TR::RegisterDependencyConditions * generateRegisterDependencyConditions(TR::Node *, TR::CodeGenerator *, uint32_t = 0, List<TR::Register> * = 0);
TR::RegisterDependencyConditions * generateRegisterDependencyConditions(uint32_t, uint32_t, TR::CodeGenerator *);
#endif