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OMRInstruction.cpp
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/*******************************************************************************
* Copyright (c) 2000, 2016 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
*******************************************************************************/
#include "compile/Compilation.hpp"
#include "il/Node.hpp"
#include "il/Node_inlines.hpp"
#include "codegen/Relocation.hpp"
#include "codegen/CodeGenerator.hpp"
#include "codegen/Machine.hpp"
#include "codegen/ARMInstruction.hpp"
#include "codegen/Linkage.hpp"
#include "codegen/UnresolvedDataSnippet.hpp"
#include "infra/Bit.hpp"
#include "arm/codegen/GenerateInstructions.hpp"
#include "codegen/ARMOutOfLineCodeSection.hpp"
bool constantIsImmed8r(int32_t intValue, uint32_t *base, uint32_t *rotate)
{
uint32_t trailing;
uint32_t bitPattern = (uint32_t) intValue;
// special case 0
if(0 == intValue)
{
*base = *rotate = 0;
return true;
}
trailing = trailingZeroes(bitPattern);
trailing &= 0xFFFFFFFE; // make clip the low bit off as we can only do even rotates
if(trailing > 0)
{
bitPattern = bitPattern >> trailing;
}
if(bitPattern & 0xFFFFFF00)
{
return false;
}
*base = bitPattern;
*rotate = trailing;
return true;
}
// TR::Instruction:: member functions
OMR::ARM::Instruction::Instruction(TR::CodeGenerator *cg, TR::Instruction *precedingInstruction, TR::InstOpCode::Mnemonic op, TR::Node *node)
:OMR::Instruction(cg, precedingInstruction, op, node),
_conditions(0),
_asyncBranch(false)
{
self()->setBlockIndex(cg->getCurrentBlockIndex());
}
OMR::ARM::Instruction::Instruction(TR::CodeGenerator *cg, TR::InstOpCode::Mnemonic op, TR::Node *node)
:OMR::Instruction(cg, op, node),
_conditions(0),
_asyncBranch(false)
{
self()->setBlockIndex(cg->getCurrentBlockIndex());
}
// TODO: need to fix the InstOpCode initialization
OMR::ARM::Instruction::Instruction(TR::Node *node, TR::CodeGenerator *cg)
: OMR::InstructionConnector(cg, TR::InstOpCode::BAD, node)
{
self()->setOpCodeValue(ARMOp_bad);
self()->setConditionCode(ARMConditionCodeAL);
self()->setDependencyConditions(NULL);
}
OMR::ARM::Instruction::Instruction(TR_ARMOpCodes op, TR::Node *node, TR::CodeGenerator *cg)
: OMR::InstructionConnector(cg, TR::InstOpCode::BAD, node)
{
self()->setOpCodeValue(op);
self()->setConditionCode(ARMConditionCodeAL);
self()->setDependencyConditions(NULL);
}
OMR::ARM::Instruction::Instruction(TR::Instruction *precedingInstruction,
TR_ARMOpCodes op,
TR::Node *node,
TR::CodeGenerator *cg)
: OMR::InstructionConnector(cg, precedingInstruction, TR::InstOpCode::BAD, node)
{
self()->setOpCodeValue(op);
self()->setConditionCode(ARMConditionCodeAL);
self()->setDependencyConditions(NULL);
}
OMR::ARM::Instruction::Instruction(TR_ARMOpCodes op,
TR::Node *node,
TR::RegisterDependencyConditions *cond,
TR::CodeGenerator *cg)
: OMR::InstructionConnector(cg, TR::InstOpCode::BAD, node)
{
self()->setOpCodeValue(op);
self()->setConditionCode(ARMConditionCodeAL);
self()->setDependencyConditions(cond);
if (cond)
cond->incRegisterTotalUseCounts(cg);
}
OMR::ARM::Instruction::Instruction(TR::Instruction *precedingInstruction,
TR_ARMOpCodes op,
TR::Node *node,
TR::RegisterDependencyConditions *cond,
TR::CodeGenerator *cg)
: OMR::InstructionConnector(cg, precedingInstruction, TR::InstOpCode::BAD, node)
{
self()->setOpCodeValue(op);
self()->setConditionCode(ARMConditionCodeAL);
self()->setDependencyConditions(cond);
if (cond)
cond->incRegisterTotalUseCounts(cg);
}
void
OMR::ARM::Instruction::remove()
{
self()->getPrev()->setNext(self()->getNext());
self()->getNext()->setPrev(self()->getPrev());
}
void OMR::ARM::Instruction::ARMNeedsGCMap(uint32_t mask)
{
if (TR::comp()->useRegisterMaps())
self()->setNeedsGCMap(mask);
}
TR::Register *OMR::ARM::Instruction::getMemoryDataRegister()
{
return NULL;
}
bool OMR::ARM::Instruction::refsRegister(TR::Register *reg)
{
return (self()->getDependencyConditions() && self()->getDependencyConditions()->refsRegister(reg));
}
bool OMR::ARM::Instruction::defsRegister(TR::Register *reg)
{
return (self()->getDependencyConditions() && self()->getDependencyConditions()->defsRegister(reg));
}
bool OMR::ARM::Instruction::defsRealRegister(TR::Register *reg)
{
return (self()->getDependencyConditions() && self()->getDependencyConditions()->defsRealRegister(reg));
}
bool OMR::ARM::Instruction::usesRegister(TR::Register *reg)
{
return (self()->getDependencyConditions() && self()->getDependencyConditions()->usesRegister(reg));
}
bool OMR::ARM::Instruction::dependencyRefsRegister(TR::Register *reg)
{
return false;
}
TR::ARMConditionalBranchInstruction *
OMR::ARM::Instruction::getARMConditionalBranchInstruction()
{
return NULL;
}
// The following safe virtual downcast method is only used in an assertion
// check within "toARMImmInstruction"
#if defined(DEBUG) || defined(PROD_WITH_ASSUMES)
TR::ARMImmInstruction *OMR::ARM::Instruction::getARMImmInstruction()
{
return NULL;
}
#endif // defined(DEBUG) || defined(PROD_WITH_ASSUMES)
int32_t
OMR::ARM::Instruction::getMachineOpCode()
{
return self()->getOpCodeValue();
}
void OMR::ARM::Instruction::assignRegisters(TR_RegisterKinds kindToBeAssigned)
{
if (self()->getDependencyConditions())
{
self()->getDependencyConditions()->assignPostConditionRegisters(self(), kindToBeAssigned, self()->cg());
self()->getDependencyConditions()->assignPreConditionRegisters(self()->getPrev(), kindToBeAssigned, self()->cg());
}
}
// TR::ARMConditionalBranchInstruction member functions
TR::ARMConditionalBranchInstruction *TR::ARMConditionalBranchInstruction::getARMConditionalBranchInstruction()
{
return this;
}
void TR::ARMConditionalBranchInstruction::assignRegisters(TR_RegisterKinds kindToBeAssigned)
{
if (getDependencyConditions())
{
getDependencyConditions()->assignPostConditionRegisters(this, kindToBeAssigned, cg());
getDependencyConditions()->assignPreConditionRegisters(this->getPrev(), kindToBeAssigned, cg());
}
if (getLabelSymbol()->isStartOfColdInstructionStream())
{
// Switch to the outlined instruction stream and assign registers.
//
TR_ARMOutOfLineCodeSection *oi = cg()->findOutLinedInstructionsFromLabel(getLabelSymbol());
TR_ASSERT(oi, "Could not find ARMOutOfLineCodeSection stream from label. instr=%p, label=%p\n", this, getLabelSymbol());
if (cg()->getDebug())
cg()->traceRegisterAssignment("\nOOL: Start register assignment in OOL section");
if (!oi->hasBeenRegisterAssigned())
oi->assignRegisters(kindToBeAssigned);
if (cg()->getDebug())
cg()->traceRegisterAssignment("\nOOL: Finished register assignment in OOL section");
// Unlock the free spill list.
//
// TODO: live registers that are not spilled at this point should have their backing
// storage returned to the free spill list.
//
cg()->unlockFreeSpillList();
}
}
bool TR::ARMConditionalBranchInstruction::refsRegister(TR::Register *reg)
{
return false;
}
bool TR::ARMConditionalBranchInstruction::defsRegister(TR::Register *reg)
{
return false;
}
bool TR::ARMConditionalBranchInstruction::defsRealRegister(TR::Register *reg)
{
return false;
}
bool TR::ARMConditionalBranchInstruction::usesRegister(TR::Register *reg)
{
return false;
}
// TR::ARMImmInstruction:: member functions
// The following safe virtual downcast method is only used in an assertion
// check within "toARMImmInstruction"
#if defined(DEBUG) || defined(PROD_WITH_ASSUMES)
TR::ARMImmInstruction *TR::ARMImmInstruction::getARMImmInstruction()
{
return this;
}
#endif // defined(DEBUG) || defined(PROD_WITH_ASSUMES)
// TR::ARMImmSymInstruction:: member functions
TR::ARMImmSymInstruction::ARMImmSymInstruction(TR_ARMOpCodes op,
TR::Node *node,
uint32_t imm,
TR::RegisterDependencyConditions *cond,
TR::SymbolReference *sr,
TR::CodeGenerator *cg,
TR::Snippet *s,
TR_ARMConditionCode cc)
: TR::ARMImmInstruction(op, node, cond, imm, cg),
_symbolReference(sr),
_snippet(s)
{
setConditionCode(cc);
}
TR::ARMImmSymInstruction::ARMImmSymInstruction(TR::Instruction *precedingInstruction,
TR_ARMOpCodes op,
TR::Node *node,
uint32_t imm,
TR::RegisterDependencyConditions *cond,
TR::SymbolReference *sr,
TR::CodeGenerator *cg,
TR::Snippet *s,
TR_ARMConditionCode cc)
: TR::ARMImmInstruction(precedingInstruction, op, node, cond, imm, cg),
_symbolReference(sr),
_snippet(s)
{
setConditionCode(cc);
}
void TR::ARMLabelInstruction::assignRegisters(TR_RegisterKinds kindToBeAssigned)
{
TR::Compilation *comp = TR::comp();
TR::Machine *machine = cg()->machine();
TR::Register *target1Virtual = getTarget1Register();
TR::Register *source1Virtual = getSource1Register();
if (getDependencyConditions())
getDependencyConditions()->assignPostConditionRegisters(this, kindToBeAssigned, cg());
// allocate the source register
TR::RealRegister *assignedSource1Register;
if (source1Virtual)
{
if (target1Virtual) target1Virtual->block();
assignedSource1Register = machine->assignSingleRegister(source1Virtual, this);
if (target1Virtual) target1Virtual->unblock();
}
// allocate the target register last
TR::RealRegister *assignedTarget1Register;
if (target1Virtual)
{
if (source1Virtual) source1Virtual->block();
assignedTarget1Register = machine->assignSingleRegister(target1Virtual, this);
if (source1Virtual) source1Virtual->unblock();
}
if (getDependencyConditions())
getDependencyConditions()->assignPreConditionRegisters(this->getPrev(), kindToBeAssigned, cg());
if (target1Virtual) setTarget1Register(assignedTarget1Register);
if (source1Virtual) setSource1Register(assignedSource1Register);
if (isLabel() && getLabelSymbol()->isEndOfColdInstructionStream())
{
// A label instruction coming back from OOL.
//
// This label is the end of the hot instruction stream (i.e., the fallthru path).
//
if (comp->getOptions()->getRegisterAssignmentTraceOption(TR_TraceRARegisterStates))
traceMsg (comp,"\nOOL: 1. Taking register state snap shot\n");
cg()->setIsOutOfLineHotPath(true);
machine->takeRegisterStateSnapShot();
// Prevent spilled registers from reclaiming their backing store if they
// become unspilled. This will ensure a spilled register will receive the
// same backing store if it is spilled on either path of the control flow.
//
cg()->lockFreeSpillList();
}
if (isBranchOp() && getLabelSymbol()->isEndOfColdInstructionStream())
{
// This is the branch at the end of the cold instruction stream to the end of
// the hot instruction stream (or fallthru path).
//
// Start RA for OOL cold path, restore register state from snap shot
//
if (comp->getOptions()->getRegisterAssignmentTraceOption(TR_TraceRARegisterStates))
traceMsg (comp, "\nOOL: 1. Restoring Register state from snap shot\n");
cg()->setIsOutOfLineHotPath(false);
machine->restoreRegisterStateFromSnapShot();
}
}
// TR::ARMTrg1Src2Instruction:: member functions
bool TR::ARMTrg1Src2Instruction::refsRegister(TR::Register *reg)
{
return (reg == getTarget1Register() ||
reg == getSource1Register() ||
getSource2Operand()->refsRegister(reg));
}
bool TR::ARMTrg1Src2Instruction::defsRegister(TR::Register *reg)
{
return (reg == getTarget1Register());
}
bool TR::ARMTrg1Src2Instruction::defsRealRegister(TR::Register *reg)
{
return (reg == getTarget1Register()->getAssignedRegister());
}
bool TR::ARMTrg1Src2Instruction::usesRegister(TR::Register *reg)
{
return (reg == getSource1Register() || getSource2Operand()->refsRegister(reg));
}
void TR::ARMTrg1Src2Instruction::assignRegisters(TR_RegisterKinds kindToBeAssigned)
{
TR::Machine *machine = cg()->machine();
TR::Register *target1Virtual = getTarget1Register();
TR::Register *source1Virtual = getSource1Register();
TR_ARMOperand2 *source2Operand = getSource2Operand();
if (getDependencyConditions())
getDependencyConditions()->assignPostConditionRegisters(this, kindToBeAssigned, cg());
// allocate the operand2 first; we always have a source2Operand so no null check is needed
if (source1Virtual) source1Virtual->block();
if (target1Virtual) target1Virtual->block();
TR_ARMOperand2 *assignedSource2Operand = source2Operand->assignRegisters(this, cg());
if (target1Virtual) target1Virtual->unblock();
if (source1Virtual) source1Virtual->unblock();
// allocate the other source register
TR::RealRegister *assignedSource1Register;
if (source1Virtual)
{
source2Operand->block();
if (target1Virtual) target1Virtual->block();
assignedSource1Register = machine->assignSingleRegister(source1Virtual, this);
if (target1Virtual) target1Virtual->unblock();
source2Operand->unblock();
}
// allocate the target register last
TR::RealRegister *assignedTarget1Register;
if (target1Virtual)
{
source2Operand->block();
if (source1Virtual) source1Virtual->block();
assignedTarget1Register = machine->assignSingleRegister(target1Virtual, this);
if (source1Virtual) source1Virtual->unblock();
source2Operand->unblock();
}
if (getDependencyConditions())
getDependencyConditions()->assignPreConditionRegisters(this->getPrev(), kindToBeAssigned, cg());
if (target1Virtual) setTarget1Register(assignedTarget1Register);
if (source1Virtual) setSource1Register(assignedSource1Register);
setSource2Operand(assignedSource2Operand);
}
#if (defined(__VFP_FP__) && !defined(__SOFTFP__))
// TR::ARMTrg2Src1Instruction:: member functions
bool TR::ARMTrg2Src1Instruction::refsRegister(TR::Register *reg)
{
return (reg == getTarget1Register() ||
reg == getTarget2Register() ||
reg == getSource1Register() );
}
bool TR::ARMTrg2Src1Instruction::defsRegister(TR::Register *reg)
{
return (reg == getTarget1Register() || reg == getTarget2Register());
}
bool TR::ARMTrg2Src1Instruction::defsRealRegister(TR::Register *reg)
{
return (reg == getTarget1Register()->getAssignedRegister() || reg == getTarget2Register()->getAssignedRegister());
}
bool TR::ARMTrg2Src1Instruction::usesRegister(TR::Register *reg)
{
return (reg == getSource1Register());
}
void TR::ARMTrg2Src1Instruction::assignRegisters(TR_RegisterKinds kindToBeAssigned)
{
TR::Machine *machine = cg()->machine();
TR::Register *target1Virtual = getTarget1Register();
TR::Register *target2Virtual = getTarget2Register();
TR::Register *source1Virtual = getSource1Register();
if (getDependencyConditions())
getDependencyConditions()->assignPostConditionRegisters(this, kindToBeAssigned, cg());
// allocate source first;
TR::RealRegister *assignedSource1Register;
if (source1Virtual)
{
if (target1Virtual) target1Virtual->block();
if (target2Virtual) target2Virtual->block();
assignedSource1Register = machine->assignSingleRegister(source1Virtual, this);
if (target2Virtual) target2Virtual->unblock();
if (target1Virtual) target1Virtual->unblock();
}
// allocate the target1 register
TR::RealRegister *assignedTarget1Register;
if (target1Virtual)
{
if (target2Virtual) target2Virtual->block();
if (source1Virtual) source1Virtual->block();
assignedTarget1Register = machine->assignSingleRegister(target1Virtual, this);
if (source1Virtual) source1Virtual->unblock();
if (target2Virtual) target2Virtual->unblock();
}
// allocate the target1 register
TR::RealRegister *assignedTarget2Register;
if (target2Virtual)
{
if (target1Virtual) target1Virtual->block();
if (source1Virtual) source1Virtual->block();
assignedTarget2Register = machine->assignSingleRegister(target2Virtual, this);
if (source1Virtual) source1Virtual->unblock();
if (target1Virtual) target1Virtual->unblock();
}
if (getDependencyConditions())
getDependencyConditions()->assignPreConditionRegisters(this->getPrev(), kindToBeAssigned, cg());
if (target1Virtual) setTarget1Register(assignedTarget1Register);
if (target2Virtual) setTarget2Register(assignedTarget2Register);
if (source1Virtual) setSource1Register(assignedSource1Register);
}
#endif
bool TR::ARMMulInstruction::refsRegister(TR::Register *reg)
{
return (reg == getTargetLoRegister() ||
reg == getTargetHiRegister() ||
reg == getSource1Register() ||
reg == getSource2Register());
}
bool TR::ARMMulInstruction::defsRegister(TR::Register *reg)
{
return (reg == getTargetLoRegister() ||
reg == getTargetHiRegister());
}
bool TR::ARMMulInstruction::defsRealRegister(TR::Register *reg)
{
return (reg == getTargetLoRegister()->getAssignedRegister() ||
reg == getTargetHiRegister()->getAssignedRegister());
}
bool TR::ARMMulInstruction::usesRegister(TR::Register *reg)
{
return (reg == getSource1Register() ||
reg == getSource2Register());
}
void TR::ARMMulInstruction::assignRegisters(TR_RegisterKinds kindToBeAssigned)
{
TR::Machine *machine = cg()->machine();
TR::Register *targetLoVirtual = getTargetLoRegister();
TR::Register *targetHiVirtual = getTargetHiRegister(); // will be NULL if performing mul (as opposed to mull)
TR::Register *source1Virtual = getSource1Register();
TR::Register *source2Virtual = getSource2Register();
if (getDependencyConditions())
getDependencyConditions()->assignPostConditionRegisters(this, kindToBeAssigned, cg());
// allocate source2
source1Virtual->block();
targetLoVirtual->block();
if (targetHiVirtual) targetHiVirtual->block();
TR::RealRegister *assignedSource2Register = machine->assignSingleRegister(source2Virtual, this);
if (targetHiVirtual) targetHiVirtual->unblock();
targetLoVirtual->unblock();
source1Virtual->unblock();
// allocate source1
source2Virtual->block();
targetLoVirtual->block();
if (targetHiVirtual) targetHiVirtual->block();
TR::RealRegister *assignedSource1Register = machine->assignSingleRegister(source1Virtual, this);
if (targetHiVirtual) targetHiVirtual->unblock();
targetLoVirtual->unblock();
source2Virtual->unblock();
// allocate targetLo
source1Virtual->block();
source2Virtual->block();
if (targetHiVirtual) targetHiVirtual->block();
TR::RealRegister *assignedTargetLoRegister = machine->assignSingleRegister(targetLoVirtual, this);
if (targetHiVirtual) targetHiVirtual->unblock();
source2Virtual->unblock();
source1Virtual->unblock();
TR::RealRegister *assignedTargetHiRegister;
if (targetHiVirtual) // allocate targetHi if mull
{
source1Virtual->block();
source2Virtual->block();
targetLoVirtual->block();
assignedTargetHiRegister = machine->assignSingleRegister(targetHiVirtual, this);
targetLoVirtual->unblock();
source2Virtual->unblock();
source1Virtual->unblock();
}
if (getDependencyConditions())
getDependencyConditions()->assignPreConditionRegisters(this->getPrev(), kindToBeAssigned, cg());
if (targetHiVirtual) setTargetHiRegister(assignedTargetHiRegister);
setTargetLoRegister(assignedTargetLoRegister);
setSource1Register(assignedSource1Register);
setSource2Register(assignedSource2Register);
}
TR::Register *TR::ARMMemInstruction::getMemoryDataRegister()
{
return getTargetRegister();
}
bool TR::ARMMemInstruction::refsRegister(TR::Register *reg)
{
return getMemoryReference()->refsRegister(reg);
}
bool TR::ARMMemInstruction::usesRegister(TR::Register *reg)
{
return getMemoryReference()->refsRegister(reg);
}
void TR::ARMMemInstruction::assignRegisters(TR_RegisterKinds kindToBeAssigned)
{
if (getDependencyConditions())
getDependencyConditions()->assignPostConditionRegisters(this, kindToBeAssigned, cg());
getMemoryReference()->assignRegisters(this, cg());
if (getDependencyConditions())
getDependencyConditions()->assignPreConditionRegisters(this->getPrev(), kindToBeAssigned, cg());
}
// TR::ARMMemSrc1Instruction:: member functions
bool TR::ARMMemSrc1Instruction::refsRegister(TR::Register *reg)
{
return (getMemoryReference()->refsRegister(reg) || reg == getSourceRegister());
}
bool TR::ARMMemSrc1Instruction::defsRegister(TR::Register *reg)
{
return false;
}
bool TR::ARMMemSrc1Instruction::defsRealRegister(TR::Register *reg)
{
return false;
}
bool TR::ARMMemSrc1Instruction::usesRegister(TR::Register *reg)
{
return (getMemoryReference()->refsRegister(reg) || reg == getSourceRegister());
}
void TR::ARMMemSrc1Instruction::assignRegisters(TR_RegisterKinds kindToBeAssigned)
{
TR::Machine *machine = cg()->machine();
TR::Register *sourceVirtual = getSourceRegister();
TR::Register *mBaseVirtual = getMemoryReference()->getModBase();
if (getDependencyConditions())
getDependencyConditions()->assignPostConditionRegisters(this, kindToBeAssigned, cg());
sourceVirtual->block();
getMemoryReference()->assignRegisters(this, cg());
sourceVirtual->unblock();
getMemoryReference()->blockRegisters();
TR::RealRegister *assignedRegister = sourceVirtual->getAssignedRealRegister();
if (assignedRegister == NULL)
{
if (sourceVirtual->getTotalUseCount() == sourceVirtual->getFutureUseCount())
{
TR_RegisterKinds kindOfRegister = sourceVirtual->getKind();
if ((assignedRegister = machine->findBestFreeRegister(kindOfRegister, false, true)) == NULL)
{
assignedRegister = machine->freeBestRegister(this, kindOfRegister);
}
}
else
{
assignedRegister = machine->reverseSpillState(this, sourceVirtual);
}
sourceVirtual->setAssignedRegister(assignedRegister);
assignedRegister->setAssignedRegister(sourceVirtual);
assignedRegister->setState(TR::RealRegister::Assigned);
}
getMemoryReference()->unblockRegisters();
if (sourceVirtual->decFutureUseCount() == 0)
{
sourceVirtual->setAssignedRegister(NULL);
assignedRegister->setState(TR::RealRegister::Unlatched);
}
setSourceRegister(assignedRegister);
TR::RealRegister *mBaseReal = mBaseVirtual ? toRealRegister(getMemoryReference()->getModBase()) : NULL;
if (mBaseVirtual && mBaseVirtual->decFutureUseCount()==0)
{
mBaseVirtual->setAssignedRegister(NULL);
mBaseReal->setState(TR::RealRegister::Unlatched);
}
if (getDependencyConditions())
getDependencyConditions()->assignPreConditionRegisters(this->getPrev(), kindToBeAssigned, cg());
}
// TR::ARMTrg1Instruction:: member functions
bool TR::ARMTrg1Instruction::refsRegister(TR::Register *reg)
{
return (reg == getTargetRegister());
}
bool TR::ARMTrg1Instruction::usesRegister(TR::Register *reg)
{
return false;
}
bool TR::ARMTrg1Instruction::defsRegister(TR::Register *reg)
{
return (reg == getTargetRegister());
}
bool TR::ARMTrg1Instruction::defsRealRegister(TR::Register *reg)
{
return (reg == getTargetRegister()->getAssignedRegister());
}
void TR::ARMTrg1Instruction::assignRegisters(TR_RegisterKinds kindToBeAssigned)
{
if (getDependencyConditions())
getDependencyConditions()->assignPostConditionRegisters(this, kindToBeAssigned, cg());
TR::Machine *machine = cg()->machine();
TR::Register *targetVirtual = getTargetRegister();
setTargetRegister(machine->assignSingleRegister(targetVirtual, this));
if (getDependencyConditions())
getDependencyConditions()->assignPreConditionRegisters(this->getPrev(), kindToBeAssigned, cg());
}
// TR::ARMTrg1MemInstruction:: member functions
bool TR::ARMTrg1MemInstruction::refsRegister(TR::Register *reg)
{
return (reg == getTargetRegister() || getMemoryReference()->refsRegister(reg));
}
bool TR::ARMTrg1MemInstruction::usesRegister(TR::Register *reg)
{
return getMemoryReference()->refsRegister(reg);
}
void TR::ARMTrg1MemInstruction::assignRegisters(TR_RegisterKinds kindToBeAssigned)
{
TR::Register *targetVirtual = getTargetRegister();
TR::Register *mBaseVirtual = getMemoryReference()->getModBase();
if (getDependencyConditions())
getDependencyConditions()->assignPostConditionRegisters(this, kindToBeAssigned, cg());
getMemoryReference()->blockRegisters();
setTargetRegister(cg()->machine()->assignSingleRegister(targetVirtual, this));
getMemoryReference()->unblockRegisters();
targetVirtual->block();
getMemoryReference()->assignRegisters(this, cg());
targetVirtual->unblock();
TR::RealRegister *mBaseReal = mBaseVirtual ? toRealRegister(getMemoryReference()->getModBase()) : NULL;
if (mBaseVirtual && mBaseVirtual->decFutureUseCount() == 0)
{
mBaseVirtual->setAssignedRegister(NULL);
mBaseReal->setState(TR::RealRegister::Unlatched);
}
if (getDependencyConditions())
getDependencyConditions()->assignPreConditionRegisters(this->getPrev(), kindToBeAssigned, cg());
}
// TR::ARMTrg1MemSrc1Instruction:: member functions
bool TR::ARMTrg1MemSrc1Instruction::refsRegister(TR::Register *reg)
{
return (reg == getTargetRegister() || getMemoryReference()->refsRegister(reg) || reg == getSourceRegister());
}
bool TR::ARMTrg1MemSrc1Instruction::usesRegister(TR::Register *reg)
{
return (getMemoryReference()->refsRegister(reg) || reg == getSourceRegister());
}
void TR::ARMTrg1MemSrc1Instruction::assignRegisters(TR_RegisterKinds kindToBeAssigned)
{
TR::Register *targetVirtual = getTargetRegister();
TR::Register *mBaseVirtual = getMemoryReference()->getModBase();
TR::Register *sourceVirtual = getSourceRegister();
if (getDependencyConditions())
getDependencyConditions()->assignPostConditionRegisters(this, kindToBeAssigned, cg());
getMemoryReference()->blockRegisters();
targetVirtual->block();
setTargetRegister(cg()->machine()->assignSingleRegister(sourceVirtual, this));
targetVirtual->unblock();
getMemoryReference()->unblockRegisters();
targetVirtual->block();
sourceVirtual->block();
getMemoryReference()->assignRegisters(this, cg());
sourceVirtual->block();
targetVirtual->unblock();
getMemoryReference()->blockRegisters();
sourceVirtual->block();
setTargetRegister(cg()->machine()->assignSingleRegister(targetVirtual, this));
sourceVirtual->unblock();
getMemoryReference()->unblockRegisters();
TR::RealRegister *mBaseReal = mBaseVirtual ? toRealRegister(getMemoryReference()->getModBase()) : NULL;
if (mBaseVirtual && mBaseVirtual->decFutureUseCount() == 0)
{
mBaseVirtual->setAssignedRegister(NULL);
mBaseReal->setState(TR::RealRegister::Unlatched);
}
if (getDependencyConditions())
getDependencyConditions()->assignPreConditionRegisters(this->getPrev(), kindToBeAssigned, cg());
}
// TR::ARMControlFlowInstruction:: member functions
bool TR::ARMControlFlowInstruction::refsRegister(TR::Register *reg)
{
int i;
for (i = 0; i < getNumTargets(); i++)
{
if (reg == getTargetRegister(i))
return true;
}
for (i = 0; i < getNumSources(); i++)
{
if (reg == getSourceRegister(i))
return true;
}
return false;
}
bool TR::ARMControlFlowInstruction::defsRegister(TR::Register *reg)
{
for (int i = 0; i < getNumTargets(); i++)
{
if (reg == getTargetRegister(i))
return true;
}
return false;
}
bool TR::ARMControlFlowInstruction::defsRealRegister(TR::Register *reg)
{
for (int i = 0; i < getNumTargets(); i++)
{
if (reg == getTargetRegister(i)->getAssignedRegister())
return true;
}
return false;
}
bool TR::ARMControlFlowInstruction::usesRegister(TR::Register *reg)
{
for (int i = 0; i < getNumSources(); i++)
{
if (reg == getSourceRegister(i))
return true;
}
return false;
}
static TR::Instruction *expandBlongLessThan(TR::Node *node,
TR::CodeGenerator *cg,
TR::Instruction *cursor,
TR::Register *temp,
TR::Register *result,
TR::Register *aHi,
TR::Register *aLo,
TR::Register *bHi,
TR::Register *bLo,
bool trueValue)
{
// This helper works by subtracting the two long values, and testing the
// resulting high word. The only interesting test on the high word is if
// it is negative. (A zero high word does not indicate that both words
// are zero!).
cursor = generateTrg1ImmInstruction(cg, ARMOp_mov, node, result, !trueValue, 0, cursor);
cursor = generateTrg1Src2Instruction(cg, ARMOp_sub_r, node, temp, aLo, bLo, cursor);
cursor = generateTrg1Src2Instruction(cg, ARMOp_sbc_r, node, temp, aHi, bHi, cursor);
cursor = generateTrg1ImmInstruction(cg, ARMOp_mov, node, result, trueValue, 0, cursor);
cursor->setConditionCode(ARMConditionCodeLT);
return cursor;
}
void TR::ARMControlFlowInstruction::assignRegisters(TR_RegisterKinds kindToBeAssigned)
{
TR::Machine *machine = cg()->machine();
TR::Node *currentNode = getNode();
TR::RealRegister *realSources[8], *realTargets[5];
int i;
if (getDependencyConditions())
getDependencyConditions()->assignPostConditionRegisters(this, kindToBeAssigned, cg());
for (i = 0; i< getNumSources(); i++)
getSourceRegister(i)->block();
for (i = 0; i< getNumTargets(); i++)
getTargetRegister(i)->block();
for (i = 0; i< getNumTargets(); i++)
{
TR::Register *targetVirtual = getTargetRegister(i);
TR::RealRegister *assignedRegister = targetVirtual->getAssignedRealRegister();
TR_RegisterKinds kindOfRegister = targetVirtual->getKind();
if (assignedRegister == NULL)
{
if (targetVirtual->getTotalUseCount() != targetVirtual->getFutureUseCount())
{
assignedRegister = machine->reverseSpillState(this, targetVirtual, NULL, false);
}
else
{
if ((assignedRegister = machine->findBestFreeRegister(kindOfRegister, false, true)) == NULL)
{
assignedRegister = machine->freeBestRegister(this, kindOfRegister, NULL, false);
}
}
targetVirtual->setAssignedRegister(assignedRegister);
assignedRegister->setAssignedRegister(targetVirtual);
assignedRegister->setState(TR::RealRegister::Assigned);
}
realTargets[i] = assignedRegister;
targetVirtual->block();
}
for (i = 0; i< getNumSources(); i++)
{
TR::Register *sourceVirtual = getSourceRegister(i);
TR_RegisterKinds kindOfRegister = sourceVirtual->getKind();
TR::RealRegister *assignedRegister = sourceVirtual->getAssignedRealRegister();
if (assignedRegister == NULL)
{
if (sourceVirtual->getTotalUseCount() == sourceVirtual->getFutureUseCount())
{
if ((assignedRegister = machine->findBestFreeRegister(kindOfRegister, false, true)) == NULL)
{
assignedRegister = machine->freeBestRegister(this, kindOfRegister, NULL, false);
}
}
else
{
assignedRegister = machine->reverseSpillState(this, sourceVirtual, NULL, false);
}
sourceVirtual->setAssignedRegister(assignedRegister);
assignedRegister->setAssignedRegister(sourceVirtual);
assignedRegister->setState(TR::RealRegister::Assigned);
}
realSources[i] = assignedRegister;
sourceVirtual->block();
}
for (i = 0; i< getNumTargets(); i++)
{
TR::Register *targetVirtual = getTargetRegister(i);
// Because of OOL codegen, if the target virtual is defined at this instruction and this instruction is in the hot path of an OOL section,
// the virtual's future use count may still be >0 at this point because of outstsanding uses in the cold path.
// Therefore we have to check if this is the start of it's live range and unlatch it.
targetVirtual->unblock();
if (targetVirtual->decFutureUseCount() == 0 || targetVirtual->getStartOfRange() == this)
{
targetVirtual->setAssignedRegister(NULL);
realTargets[i]->setState(TR::RealRegister::Unlatched);
}
setTargetRegister(i, realTargets[i]);
}
for (i = 0; i< getNumSources(); i++)
{
TR::Register *sourceVirtual = getSourceRegister(i);
sourceVirtual->unblock();
if (sourceVirtual->decFutureUseCount() == 0)
{
sourceVirtual->setAssignedRegister(NULL);
realSources[i]->setState(TR::RealRegister::Unlatched);
}
setSourceRegister(i, realSources[i]);