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UnaryEvaluator.cpp
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/*******************************************************************************
* Copyright (c) 2000, 2020 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
*******************************************************************************/
#include <stddef.h>
#include <stdint.h>
#include "codegen/CodeGenerator.hpp"
#include "env/FrontEnd.hpp"
#include "codegen/InstOpCode.hpp"
#include "codegen/Machine.hpp"
#include "codegen/MemoryReference.hpp"
#include "codegen/Register.hpp"
#include "codegen/RegisterConstants.hpp"
#include "codegen/RegisterPair.hpp"
#include "codegen/TreeEvaluator.hpp"
#include "compile/Compilation.hpp"
#include "compile/CompilationTypes.hpp"
#include "compile/ResolvedMethod.hpp"
#include "env/CompilerEnv.hpp"
#include "env/Processors.hpp"
#include "env/TRMemory.hpp"
#include "env/jittypes.h"
#include "il/DataTypes.hpp"
#include "il/ILOpCodes.hpp"
#include "il/ILOps.hpp"
#include "il/Node.hpp"
#include "il/Node_inlines.hpp"
#include "infra/Assert.hpp"
#include "p/codegen/GenerateInstructions.hpp"
#include "p/codegen/PPCOpsDefines.hpp"
class TR_OpaqueClassBlock;
class TR_OpaqueMethodBlock;
TR::Register *OMR::Power::TreeEvaluator::iconstEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Register *tempReg = node->setRegister(cg->allocateRegister());
loadConstant(cg, node, (int32_t)node->get64bitIntegralValue(), tempReg);
return tempReg;
}
TR::Register *OMR::Power::TreeEvaluator::aconstEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Compilation *comp = cg->comp();
bool isClass = node->isClassPointerConstant();
TR_ResolvedMethod * method = comp->getCurrentMethod();
bool isPicSite = node->isClassPointerConstant() && cg->fe()->isUnloadAssumptionRequired((TR_OpaqueClassBlock *) node->getAddress(), method );
if (!isPicSite)
isPicSite = node->isMethodPointerConstant() && cg->fe()->isUnloadAssumptionRequired(cg->fe()->createResolvedMethod(cg->trMemory(), (TR_OpaqueMethodBlock *) node->getAddress(), method)->classOfMethod(), method);
bool isProfiledPointerConstant = node->isClassPointerConstant() || node->isMethodPointerConstant();
// use data snippet only on class pointers when HCR is enabled
intptr_t address = cg->comp()->target().is64Bit()? node->getLongInt(): node->getInt();
if (isClass && cg->wantToPatchClassPointer((TR_OpaqueClassBlock*)address, node) ||
isProfiledPointerConstant && cg->profiledPointersRequireRelocation())
{
TR::Register *trgReg = cg->allocateRegister();
loadAddressConstantInSnippet(cg, node, address, trgReg, NULL,TR::InstOpCode::Op_load, isPicSite, NULL);
node->setRegister(trgReg);
return trgReg;
}
else
{
TR::Register *tempReg = node->setRegister(cg->allocateRegister());
loadActualConstant(cg, node, address, tempReg, NULL, isPicSite);
return tempReg;
}
}
TR::Register *OMR::Power::TreeEvaluator::lconstEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
if (cg->comp()->target().is64Bit())
{
TR::Register *tempReg = node->setRegister(cg->allocateRegister());
loadConstant(cg, node, node->getLongInt(), tempReg);
return tempReg;
}
TR::Register *lowReg = cg->allocateRegister();
TR::Register *highReg = cg->allocateRegister();
TR::RegisterPair *trgReg = cg->allocateRegisterPair(lowReg, highReg);
node->setRegister(trgReg);
int32_t lowValue = node->getLongIntLow();
int32_t highValue = node->getLongIntHigh();
int32_t difference;
difference = highValue - lowValue;
loadConstant(cg, node, lowValue, lowReg);
if ((highValue >= LOWER_IMMED && highValue <= UPPER_IMMED) ||
difference < LOWER_IMMED || difference > UPPER_IMMED)
{
loadConstant(cg, node, highValue, highReg);
}
else
{
generateTrg1Src1ImmInstruction(cg, TR::InstOpCode::addi2, node, highReg, lowReg, difference);
}
return trgReg;
}
TR::Register *OMR::Power::TreeEvaluator::inegEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Register *trgReg;
trgReg = cg->allocateRegister(TR_GPR);
TR::Node *firstChild = node->getFirstChild();
TR::Register *sourceRegister = cg->evaluate(firstChild);
generateTrg1Src1Instruction(cg, TR::InstOpCode::neg, node, trgReg, sourceRegister);
cg->decReferenceCount(firstChild);
return node->setRegister(trgReg);
}
TR::Register *OMR::Power::TreeEvaluator::lnegEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
if (cg->comp()->target().is64Bit())
{
return TR::TreeEvaluator::inegEvaluator(node, cg);
}
else
{
TR::Node *firstChild = node->getFirstChild();
TR::Register *lowReg = cg->allocateRegister();
TR::Register *highReg = cg->allocateRegister();
TR::RegisterPair *trgReg = cg->allocateRegisterPair(lowReg, highReg);
TR::Register *sourceRegister = cg->evaluate(firstChild);
generateTrg1Src1ImmInstruction(cg, TR::InstOpCode::subfic, node, lowReg, sourceRegister->getLowOrder(), 0);
generateTrg1Src1Instruction(cg, TR::InstOpCode::subfze, node, highReg, sourceRegister->getHighOrder());
node->setRegister(trgReg);
cg->decReferenceCount(firstChild);
return trgReg;
}
}
TR::Register *OMR::Power::TreeEvaluator::iabsEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Register *trgReg = cg->allocateRegister();
TR::Register *tmpReg = cg->allocateRegister();
TR::Node *firstChild = node->getFirstChild();
TR::Register *sourceRegister = cg->evaluate(firstChild);
generateTrg1Src1ImmInstruction(cg, TR::InstOpCode::srawi, node, trgReg, sourceRegister, 31);
generateTrg1Src2Instruction(cg, TR::InstOpCode::XOR, node, tmpReg, sourceRegister, trgReg);
generateTrg1Src2Instruction(cg, TR::InstOpCode::subfc, node, trgReg, trgReg, tmpReg);
cg->stopUsingRegister(tmpReg);
node->setRegister(trgReg);
cg->decReferenceCount(firstChild);
return trgReg;
}
TR::Register *OMR::Power::TreeEvaluator::labsEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
if (cg->comp()->target().is64Bit())
{
TR::Register *trgReg = cg->allocateRegister();
TR::Register *tmpReg = cg->allocateRegister();
TR::Node *firstChild = node->getFirstChild();
TR::Register *sourceRegister = cg->evaluate(firstChild);
generateTrg1Src1ImmInstruction(cg, TR::InstOpCode::sradi, node, trgReg, sourceRegister, 63);
generateTrg1Src2Instruction(cg, TR::InstOpCode::XOR, node, tmpReg, sourceRegister, trgReg);
generateTrg1Src2Instruction(cg, TR::InstOpCode::subfc, node, trgReg, trgReg, tmpReg);
cg->stopUsingRegister(tmpReg);
node->setRegister(trgReg);
cg->decReferenceCount(firstChild);
return trgReg;
}
else
{
TR::Node *firstChild = node->getFirstChild();
TR::Register *lowReg = cg->allocateRegister();
TR::Register *highReg = cg->allocateRegister();
TR::RegisterPair *trgReg = cg->allocateRegisterPair(lowReg, highReg);
TR::Register *sourceRegister = cg->evaluate(firstChild);
TR::Register *tempReg = cg->allocateRegister();
generateTrg1Src1ImmInstruction(cg, TR::InstOpCode::srawi, node, tempReg, sourceRegister->getHighOrder(), 31);
generateTrg1Src2Instruction(cg, TR::InstOpCode::XOR, node, highReg, sourceRegister->getHighOrder(), tempReg);
generateTrg1Src2Instruction(cg, TR::InstOpCode::XOR, node, lowReg, sourceRegister->getLowOrder(), tempReg);
generateTrg1Src2Instruction(cg, TR::InstOpCode::subfc, node, lowReg, tempReg, lowReg);
generateTrg1Src2Instruction(cg, TR::InstOpCode::subfe, node, highReg, tempReg, highReg);
cg->stopUsingRegister(tempReg);
node->setRegister(trgReg);
cg->decReferenceCount(firstChild);
return trgReg;
}
}
TR::Register *OMR::Power::TreeEvaluator::fabsEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Register *trgReg;
trgReg = cg->allocateSinglePrecisionRegister();
TR::Node *firstChild = node->getFirstChild();
TR::Register *sourceRegister = cg->evaluate(firstChild);
generateTrg1Src1Instruction(cg, TR::InstOpCode::fabs, node, trgReg, sourceRegister);
cg->decReferenceCount(firstChild);
return node->setRegister(trgReg);
}
TR::Register *OMR::Power::TreeEvaluator::dabsEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Register *trgReg;
trgReg = cg->allocateRegister(TR_FPR);
TR::Node *firstChild = node->getFirstChild();
TR::Register *sourceRegister = cg->evaluate(firstChild);
generateTrg1Src1Instruction(cg, TR::InstOpCode::fabs, node, trgReg, sourceRegister);
cg->decReferenceCount(firstChild);
return node->setRegister(trgReg);
}
// also handles b2s, bu2s
TR::Register *OMR::Power::TreeEvaluator::b2iEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Node *child = node->getFirstChild();
TR::Register *trgReg;
if (node->isUnneededConversion() ||
(child->getOpCodeValue() != TR::bload &&
child->getOpCodeValue() != TR::bloadi &&
child->getOpCodeValue() != TR::buload &&
child->getOpCodeValue() != TR::buloadi &&
child->getOpCodeValue() != TR::s2b &&
child->getOpCodeValue() != TR::f2b &&
child->getOpCodeValue() != TR::d2b &&
child->getOpCodeValue() != TR::i2b &&
child->getOpCodeValue() != TR::l2b &&
child->getOpCodeValue() != TR::iRegLoad &&
child->getOpCodeValue() != TR::iuRegLoad ))
{
trgReg = cg->gprClobberEvaluate(child);
}
else
{
trgReg = cg->allocateRegister();
generateTrg1Src1Instruction(cg, TR::InstOpCode::extsb, node, trgReg, cg->evaluate(child));
}
node->setRegister(trgReg);
cg->decReferenceCount(child);
return trgReg;
}
TR::Register *OMR::Power::TreeEvaluator::b2aEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
if (cg->comp()->target().is64Bit())
return TR::TreeEvaluator::b2lEvaluator(node, cg);
else
return TR::TreeEvaluator::b2iEvaluator(node, cg);
}
TR::Register *OMR::Power::TreeEvaluator::s2iEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Node *child = node->getFirstChild();
TR::Register *trgReg = 0;
TR_ASSERT(node->getOpCodeValue() == TR::s2i, "s2iEvaluator called for a %s node",
node->getOpCode().getName());
if (node->getOpCodeValue() == TR::s2i)// s2i sign extend
{
trgReg = child->getRegister();
if (!trgReg && child->getOpCode().isMemoryReference() && child->getReferenceCount() == 1)
{
trgReg = cg->allocateRegister();
TR::MemoryReference *tempMR = new (cg->trHeapMemory()) TR::MemoryReference(child, 2, cg);
#ifdef J9_ProjectSpecific
if (node->getFirstChild()->getOpCodeValue() == TR::irsload)
{
tempMR->forceIndexedForm(node->getFirstChild(), cg);
generateTrg1MemInstruction(cg, TR::InstOpCode::lhbrx, node, trgReg, tempMR);
generateTrg1Src1Instruction(cg, TR::InstOpCode::extsh, node, trgReg, trgReg);
}
else
#endif
generateTrg1MemInstruction(cg, TR::InstOpCode::lha, node, trgReg, tempMR);
tempMR->decNodeReferenceCounts(cg);
}
else
{
if(!trgReg)
{
// child reg is null. need to evaluate child
trgReg = cg->evaluate(child);
if(child->getReferenceCount() == 1)
{
generateTrg1Src1Instruction(cg, TR::InstOpCode::extsh, node, trgReg, trgReg);
}
else
{
TR::Register * trgRegOld = trgReg;
trgReg = cg->allocateRegister();
generateTrg1Src1Instruction(cg, TR::InstOpCode::extsh, node, trgReg, trgRegOld);
}
}
else if(child->getReferenceCount() > 1)
{
// child has been evaluated, but will be used later
TR::Register * trgRegOld = trgReg;
trgReg = cg->allocateRegister();
generateTrg1Src1Instruction(cg, TR::InstOpCode::extsh, node, trgReg, trgRegOld);
}
else
{
generateTrg1Src1Instruction(cg, TR::InstOpCode::extsh, node, trgReg, trgReg);
}
}
}
else
trgReg = cg->gprClobberEvaluate(child);
node->setRegister(trgReg);
cg->decReferenceCount(child);
return trgReg;
}
TR::Register *OMR::Power::TreeEvaluator::b2lEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Node *child = node->getFirstChild();
if (cg->comp()->target().is64Bit())
{
TR::Register *trgReg = cg->allocateRegister();
generateTrg1Src1Instruction(cg, TR::InstOpCode::extsb, node, trgReg, cg->evaluate(child));
node->setRegister(trgReg);
cg->decReferenceCount(child);
return trgReg;
}
else // 32 bit target
{
TR::Register *lowReg = cg->allocateRegister();
TR::Register *highReg = cg->allocateRegister();
TR::RegisterPair *trgReg = cg->allocateRegisterPair(lowReg, highReg);
generateTrg1Src1Instruction(cg, TR::InstOpCode::extsb, node, lowReg, cg->evaluate(child));
generateTrg1Src1ImmInstruction(cg, TR::InstOpCode::srawi, node, highReg, trgReg->getLowOrder(), 31);
node->setRegister(trgReg);
cg->decReferenceCount(child);
return trgReg;
}
}
//also handles i2l
TR::Register *OMR::Power::TreeEvaluator::s2lEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Node *child = node->getFirstChild();
if (cg->comp()->target().is64Bit())
{
TR::InstOpCode::Mnemonic opCode = TR::InstOpCode::extsw;
TR::ILOpCodes nodeOpCode = node->getOpCodeValue();
if (nodeOpCode == TR::i2l && child->skipSignExtension())
{
if (child->getReferenceCount() < 2 || !cg->useClobberEvaluate())
{
cg->decReferenceCount(child);
return cg->evaluate(child);
}
opCode = TR::InstOpCode::mr;
}
TR::Register *trgReg = cg->allocateRegister();
generateTrg1Src1Instruction(cg, opCode, node, trgReg, cg->evaluate(child));
node->setRegister(trgReg);
cg->decReferenceCount(child);
return trgReg;
}
else // 32 bit target
{
TR::Register *sourceRegister = NULL;
TR::Register *trgReg = cg->allocateRegisterPair(cg->gprClobberEvaluate(child),
cg->allocateRegister());
generateTrg1Src1ImmInstruction(cg, TR::InstOpCode::srawi, node, trgReg->getHighOrder(), trgReg->getLowOrder(), 31);
node->setRegister(trgReg);
cg->decReferenceCount(child);
return trgReg;
}
}
//also handles su2l
TR::Register *OMR::Power::TreeEvaluator::iu2lEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Node *child = node->getFirstChild();
if (cg->comp()->target().is64Bit())
{
if (node->getOpCodeValue() == TR::iu2l && child && child->getReferenceCount() == 1 && !child->getRegister() &&
(child->getOpCodeValue() == TR::iloadi || child->getOpCodeValue() == TR::iload))
{
TR::Register *returnRegister = cg->evaluate(child);
node->setRegister(returnRegister);
cg->decReferenceCount(child);
return returnRegister;
}
if (!cg->useClobberEvaluate() && // Sharing registers between nodes only works when not using simple clobber evaluation
node->getOpCodeValue() == TR::iu2l && child && child->getRegister() &&
(child->getOpCodeValue() == TR::iloadi || child->getOpCodeValue() == TR::iload))
{
node->setRegister(child->getRegister());
cg->decReferenceCount(child);
return child->getRegister();
}
// TODO: check if first child is memory reference
TR::Register *trgReg = cg->allocateRegister();
generateTrg1Src1Imm2Instruction(cg, TR::InstOpCode::rldicl, node, trgReg, cg->evaluate(child), 0, CONSTANT64(0x00000000ffffffff));
node->setRegister(trgReg);
cg->decReferenceCount(child);
return trgReg;
}
else // 32 bit target
{
TR::Register *sourceRegister = NULL;
TR::Register *trgReg = cg->allocateRegisterPair(cg->gprClobberEvaluate(child),
cg->allocateRegister());
generateTrg1ImmInstruction(cg, TR::InstOpCode::li, node, trgReg->getHighOrder(), 0);
node->setRegister(trgReg);
cg->decReferenceCount(child);
return trgReg;
}
}
TR::Register *OMR::Power::TreeEvaluator::su2aEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
if (cg->comp()->target().is64Bit())
return TR::TreeEvaluator::iu2lEvaluator(node, cg);
else
return TR::TreeEvaluator::s2iEvaluator(node, cg);
}
TR::Register *OMR::Power::TreeEvaluator::su2iEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Node *child = node->getFirstChild();
TR::Register *sourceRegister = NULL;
TR::Register *trgReg = cg->allocateRegister();
TR::Register *temp;
temp = child->getRegister();
if (child->getReferenceCount()==1 &&
child->getOpCode().isMemoryReference() && (temp == NULL))
{
TR::MemoryReference *tempMR = new (cg->trHeapMemory()) TR::MemoryReference(child, 2, cg);
generateTrg1MemInstruction(cg, TR::InstOpCode::lhz, node, trgReg, tempMR);
tempMR->decNodeReferenceCounts(cg);
}
else
{
generateTrg1Src1Imm2Instruction(cg, TR::InstOpCode::rlwinm, node, trgReg, cg->evaluate(child), 0, 0xffff);
cg->decReferenceCount(child);
}
return node->setRegister(trgReg);
}
TR::Register *OMR::Power::TreeEvaluator::s2aEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
if (cg->comp()->target().is64Bit())
return TR::TreeEvaluator::s2lEvaluator(node, cg);
else
return TR::TreeEvaluator::s2iEvaluator(node, cg);
}
// also handles s2b
TR::Register *OMR::Power::TreeEvaluator::i2bEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Node *child = node->getFirstChild();
TR::Register *trgReg = cg->gprClobberEvaluate(child);
node->setRegister(trgReg);
cg->decReferenceCount(child);
return trgReg;
}
TR::Register *OMR::Power::TreeEvaluator::i2cEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Node *child = node->getFirstChild();
TR::Register *sourceRegister = NULL;
TR::Register *trgReg = cg->allocateRegister();
if (child->getReferenceCount() == 1 &&
child->getOpCode().isMemoryReference() &&
child->getRegister() == NULL)
{
TR::MemoryReference *tempMR = new (cg->trHeapMemory()) TR::MemoryReference(child, 2, cg);
tempMR->addToOffset(node, cg->comp()->target().cpu.isBigEndian()?2:0, cg);
generateTrg1MemInstruction(cg, TR::InstOpCode::lhz, node, trgReg, tempMR);
tempMR->decNodeReferenceCounts(cg);
}
else
{
generateTrg1Src1Imm2Instruction(cg, TR::InstOpCode::rlwinm, node, trgReg, cg->evaluate(child), 0, 0xffff);
cg->decReferenceCount(child);
}
return node->setRegister(trgReg);
}
TR::Register *OMR::Power::TreeEvaluator::i2sEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Node *child = node->getFirstChild();
TR::Register *trgReg = cg->allocateRegister();
if (cg->comp()->target().cpu.id() != TR_PPCp6 && // avoid algebraic loads on P6
child->getReferenceCount() == 1 &&
child->getOpCode().isMemoryReference() &&
child->getRegister() == NULL)
{
TR::MemoryReference *tempMR = new (cg->trHeapMemory()) TR::MemoryReference(child, 2, cg);
tempMR->addToOffset(node, cg->comp()->target().cpu.isBigEndian()?2:0, cg);
generateTrg1MemInstruction(cg, TR::InstOpCode::lhz, node, trgReg, tempMR);
generateTrg1Src1Instruction(cg, TR::InstOpCode::extsh, node, trgReg, trgReg);
tempMR->decNodeReferenceCounts(cg);
}
else
{
generateTrg1Src1Instruction(cg, TR::InstOpCode::extsh, node, trgReg, cg->evaluate(child));
cg->decReferenceCount(child);
}
return node->setRegister(trgReg);
}
TR::Register *OMR::Power::TreeEvaluator::i2aEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
if (cg->comp()->target().is64Bit())
return TR::TreeEvaluator::s2lEvaluator(node, cg);
else
return TR::TreeEvaluator::passThroughEvaluator(node, cg);
}
TR::Register *OMR::Power::TreeEvaluator::iu2aEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
if (cg->comp()->target().is64Bit())
return TR::TreeEvaluator::iu2lEvaluator(node, cg);
else
return TR::TreeEvaluator::passThroughEvaluator(node, cg);
}
TR::Register *OMR::Power::TreeEvaluator::l2bEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Node *child = node->getFirstChild();
TR::Register *trgReg;
if (child->getReferenceCount()==1 &&
child->getOpCode().isMemoryReference() && (child->getRegister() == NULL))
{
TR::MemoryReference *tempMR = new (cg->trHeapMemory()) TR::MemoryReference(child, 1, cg);
trgReg = cg->allocateRegister();
tempMR->addToOffset(node, cg->comp()->target().cpu.isBigEndian()?7:0, cg);
generateTrg1MemInstruction(cg, TR::InstOpCode::lbz, node, trgReg, tempMR);
node->setRegister(trgReg);
tempMR->decNodeReferenceCounts(cg);
}
else
{
TR::Register *temp = cg->evaluate(child);
if (child->getReferenceCount() == 1 || !cg->useClobberEvaluate())
{
if (cg->comp()->target().is64Bit())
trgReg = temp;
else // 32 bit target
trgReg = temp->getLowOrder();
}
else
{
trgReg = cg->allocateRegister();
if (cg->comp()->target().is64Bit())
generateTrg1Src1Instruction(cg, TR::InstOpCode::mr, node, trgReg, temp);
else
generateTrg1Src1Instruction(cg, TR::InstOpCode::mr, node, trgReg, temp->getLowOrder());
}
node->setRegister(trgReg);
cg->decReferenceCount(child);
}
return trgReg;
}
// is this used?
TR::Register *OMR::Power::TreeEvaluator::l2buEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Node *child = node->getFirstChild();
TR::Register *trgReg = cg->allocateRegister();
if (child->getReferenceCount()==1 &&
child->getOpCode().isMemoryReference() && (child->getRegister() == NULL))
{
TR::MemoryReference *tempMR = new (cg->trHeapMemory()) TR::MemoryReference(child, 1, cg);
tempMR->addToOffset(node, cg->comp()->target().cpu.isBigEndian()?7:0, cg);
generateTrg1MemInstruction(cg, TR::InstOpCode::lbz, node, trgReg, tempMR);
tempMR->decNodeReferenceCounts(cg);
}
else
{
TR::Register *tempReg;
if (cg->comp()->target().is64Bit())
tempReg = cg->evaluate(child);
else // 32 bit target
tempReg = cg->evaluate(child)->getLowOrder();
cg->decReferenceCount(child);
generateTrg1Src1Imm2Instruction(cg, TR::InstOpCode::rlwinm, node, trgReg, tempReg, 0, 0xff);
}
return node->setRegister(trgReg);
}
TR::Register *OMR::Power::TreeEvaluator::l2cEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Node *child = node->getFirstChild();
TR::Register *temp;
TR::Register *trgReg = cg->allocateRegister();
temp = child->getRegister();
if (child->getReferenceCount()==1 &&
child->getOpCode().isMemoryReference() && (temp == NULL))
{
TR::MemoryReference *tempMR = new (cg->trHeapMemory()) TR::MemoryReference(child, 2, cg);
tempMR->addToOffset(node, cg->comp()->target().cpu.isBigEndian()?6:0, cg);
generateTrg1MemInstruction(cg, TR::InstOpCode::lhz, node, trgReg, tempMR);
tempMR->decNodeReferenceCounts(cg);
}
else
{
if (cg->comp()->target().is64Bit())
generateTrg1Src1Imm2Instruction(cg, TR::InstOpCode::rldicl, node, trgReg, cg->evaluate(child), 0, CONSTANT64(0x000000000000ffff));
else // 32 bit target
generateTrg1Src1Imm2Instruction(cg, TR::InstOpCode::rlwinm, node, trgReg, cg->evaluate(child)->getLowOrder(), 0, 0xffff);
cg->decReferenceCount(child);
}
return node->setRegister(trgReg);
}
TR::Register *OMR::Power::TreeEvaluator::l2sEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Node *child = node->getFirstChild();
TR::Register *trgReg = cg->allocateRegister();
if (child->getReferenceCount()==1 &&
child->getOpCode().isMemoryReference() &&
child->getRegister() == NULL)
{
TR::MemoryReference *tempMR = new (cg->trHeapMemory()) TR::MemoryReference(child, 2, cg);
tempMR->addToOffset(node, cg->comp()->target().cpu.isBigEndian()?6:0, cg);
if (cg->comp()->target().cpu.id() == TR_PPCp6) // avoid algebraic loads on P6
{
generateTrg1MemInstruction(cg, TR::InstOpCode::lhz, node, trgReg, tempMR);
generateTrg1Src1Instruction(cg, TR::InstOpCode::extsh, node, trgReg, trgReg);
}
else
generateTrg1MemInstruction(cg, TR::InstOpCode::lha, node, trgReg, tempMR);
tempMR->decNodeReferenceCounts(cg);
}
else
{
if (cg->comp()->target().is64Bit())
generateTrg1Src1Instruction(cg, TR::InstOpCode::extsh, node, trgReg, cg->evaluate(child));
else // 32 bit target
generateTrg1Src1Instruction(cg, TR::InstOpCode::extsh, node, trgReg, cg->evaluate(child)->getLowOrder());
cg->decReferenceCount(child);
}
return node->setRegister(trgReg);
}
TR::Register *OMR::Power::TreeEvaluator::l2iEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Node *child = node->getFirstChild();
TR::Register *trgReg;
TR::Register *temp;
temp = child->getRegister();
if (child->getReferenceCount()==1 &&
child->getOpCode().isMemoryReference() && (temp == NULL))
{
trgReg = cg->allocateRegister();
TR::MemoryReference *tempMR = new (cg->trHeapMemory()) TR::MemoryReference(child, 4, cg);
tempMR->addToOffset(node, cg->comp()->target().cpu.isBigEndian()?4:0, cg);
generateTrg1MemInstruction(cg, TR::InstOpCode::lwz, node, trgReg, tempMR);
tempMR->decNodeReferenceCounts(cg);
node->setRegister(trgReg);
}
else
{
temp = cg->evaluate(child);
if (child->getReferenceCount() == 1 || !cg->useClobberEvaluate())
{
if (cg->comp()->target().is64Bit())
trgReg = temp;
else // 32 bit target
trgReg = temp->getLowOrder();
}
else
{
trgReg = cg->allocateRegister();
if (cg->comp()->target().is64Bit())
generateTrg1Src1Instruction(cg, TR::InstOpCode::mr, node, trgReg, temp);
else
generateTrg1Src1Instruction(cg, TR::InstOpCode::mr, node, trgReg, temp->getLowOrder());
}
node->setRegister(trgReg);
cg->decReferenceCount(child);
}
return trgReg;
}
TR::Register *OMR::Power::TreeEvaluator::l2aEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Compilation *comp = cg->comp();
if (cg->comp()->target().is64Bit())
{
// -J9JIT_COMPRESSED_POINTER-
//
if (comp->useCompressedPointers())
{
// pattern match the sequence under the l2a
// iaload f l2a <- node
// aload O ladd
// lshl
// i2l
// iiload f <- load
// aload O
// iconst shftKonst
// lconst HB
//
// -or- if the load is known to be null
// l2a
// i2l
// iiload f
// aload O
//
TR::Node *firstChild = node->getFirstChild();
bool hasCompPtrs = false;
if (firstChild->getOpCode().isAdd() &&
firstChild->containsCompressionSequence())
hasCompPtrs = true;
else if (node->isNull())
hasCompPtrs = true;
// after remat changes, this assume is no longer valid
//
///TR_ASSERT(hasCompPtrs, "no compression sequence found under l2a node [%p]\n", node);
TR::Register *source = cg->evaluate(firstChild);
if ((firstChild->containsCompressionSequence() || (TR::Compiler->om.compressedReferenceShift() == 0)) && !node->isl2aForCompressedArrayletLeafLoad())
source->setContainsCollectedReference();
node->setRegister(source);
cg->decReferenceCount(firstChild);
cg->insertPrefetchIfNecessary(node, source);
return source;
}
else
return TR::TreeEvaluator::passThroughEvaluator(node, cg);
}
else
return TR::TreeEvaluator::l2iEvaluator(node, cg);
}
TR::Register *OMR::Power::TreeEvaluator::su2lEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Node *child = node->getFirstChild();
TR::Register *sourceRegister = NULL;
if (cg->comp()->target().is64Bit())
{
TR::Register *trgReg = cg->allocateRegister();
TR::Register *temp;
temp = child->getRegister();
if (child->getReferenceCount()==1 &&
child->getOpCode().isMemoryReference() && (temp == NULL))
{
TR::MemoryReference *tempMR = new (cg->trHeapMemory()) TR::MemoryReference(child, 2, cg);
generateTrg1MemInstruction(cg, TR::InstOpCode::lhz, node, trgReg, tempMR);
tempMR->decNodeReferenceCounts(cg);
}
else
{
generateTrg1Src1Imm2Instruction(cg, TR::InstOpCode::rldicl, node, trgReg, cg->evaluate(child), 0, CONSTANT64(0x000000000000ffff));
cg->decReferenceCount(child);
}
return node->setRegister(trgReg);
}
else // 32 bit target
{
bool decSharedNode = false;
TR::Register *trgReg = cg->allocateRegisterPair(cg->gprClobberEvaluate(child),
cg->allocateRegister());
TR::Register *temp;
temp = child->getRegister();
if (child->getReferenceCount()==1 &&
child->getOpCode().isMemoryReference() && (temp == NULL))
{
TR::MemoryReference *tempMR = new (cg->trHeapMemory()) TR::MemoryReference(child, 2, cg);
generateTrg1MemInstruction(cg, TR::InstOpCode::lhz, node, trgReg->getLowOrder(), tempMR);
tempMR->decNodeReferenceCounts(cg);
}
else
{
generateTrg1Src1Imm2Instruction(cg, TR::InstOpCode::rlwinm, node, trgReg->getLowOrder(), cg->evaluate(child), 0, 0xffff);
decSharedNode = true;
}
generateTrg1ImmInstruction(cg, TR::InstOpCode::li, node, trgReg->getHighOrder(), 0);
node->setRegister(trgReg);
if (decSharedNode)
cg->decReferenceCount(child);
return trgReg;
}
}
TR::Register *OMR::Power::TreeEvaluator::bu2iEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Node *child = node->getFirstChild();
TR::Register *trgReg;
if (child->getOpCode().isMemoryReference())
{
trgReg = cg->gprClobberEvaluate(child);
}
else
{
trgReg = child->getRegister();
if (!trgReg && child->getOpCode().isMemoryReference() && trgReg == NULL)
{
trgReg = cg->allocateRegister();
TR::MemoryReference *tempMR = new (cg->trHeapMemory()) TR::MemoryReference(child, 2, cg);
generateTrg1MemInstruction(cg, TR::InstOpCode::lbz, node, trgReg, tempMR);
child->setRegister(trgReg);
tempMR->decNodeReferenceCounts(cg);
}
else
{
trgReg = cg->allocateRegister();
generateTrg1Src1Imm2Instruction(cg, TR::InstOpCode::rlwinm, node, trgReg, cg->evaluate(child), 0, 0xff);
}
}
node->setRegister(trgReg);
cg->decReferenceCount(child);
return trgReg;
}
TR::Register *OMR::Power::TreeEvaluator::bu2lEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Node *child = node->getFirstChild();
TR::Register *trgReg;
if (cg->comp()->target().is64Bit())
{
if (child->getOpCode().isMemoryReference())
{
trgReg = cg->gprClobberEvaluate(child);
}
else
{
trgReg = cg->allocateRegister();
generateTrg1Src1Imm2Instruction(cg, TR::InstOpCode::rldicl, node, trgReg, cg->evaluate(child), 0, CONSTANT64(0x00000000000000ff));
}
}
else // 32 bit target
{
TR::Register *lowReg;
if (child->getOpCode().isMemoryReference())
{
lowReg = cg->gprClobberEvaluate(child);
}
else
{
lowReg = cg->allocateRegister();
generateTrg1Src1Imm2Instruction(cg, TR::InstOpCode::rlwinm, node, lowReg, cg->evaluate(child), 0, 0xff);
}
TR::Register *highReg = cg->allocateRegister();
generateTrg1ImmInstruction(cg, TR::InstOpCode::li, node, highReg, 0);
trgReg = cg->allocateRegisterPair(lowReg, highReg);
}
node->setRegister(trgReg);
cg->decReferenceCount(child);
return trgReg;
}
TR::Register *OMR::Power::TreeEvaluator::bu2aEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
if (cg->comp()->target().is64Bit())
return TR::TreeEvaluator::bu2lEvaluator(node, cg);
else
return TR::TreeEvaluator::bu2iEvaluator(node, cg);
}
TR::Register *OMR::Power::TreeEvaluator::a2iEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
if (cg->comp()->target().is64Bit())
return TR::TreeEvaluator::l2iEvaluator(node, cg);
else
return TR::TreeEvaluator::passThroughEvaluator(node, cg);
}
TR::Register *OMR::Power::TreeEvaluator::a2lEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
if (cg->comp()->target().is64Bit())
return TR::TreeEvaluator::passThroughEvaluator(node, cg);
else
return TR::TreeEvaluator::iu2lEvaluator(node, cg);
}
TR::Register *OMR::Power::TreeEvaluator::a2bEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
if (cg->comp()->target().is64Bit())
return TR::TreeEvaluator::l2bEvaluator(node, cg);
else
return TR::TreeEvaluator::i2bEvaluator(node, cg);
}
TR::Register *OMR::Power::TreeEvaluator::a2sEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
if (cg->comp()->target().is64Bit())
return TR::TreeEvaluator::l2sEvaluator(node, cg);
else
return TR::TreeEvaluator::i2sEvaluator(node, cg);
}
TR::Register *OMR::Power::TreeEvaluator::libmFuncEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Node::recreate(node, TR::dcall);
TR::Register *trgReg = TR::TreeEvaluator::directCallEvaluator(node, cg);
return trgReg;
}
TR::Register *OMR::Power::TreeEvaluator::strcmpEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Node::recreate(node, TR::icall);
TR::Register *trgReg = TR::TreeEvaluator::directCallEvaluator(node, cg);
return trgReg;
}
TR::Register *OMR::Power::TreeEvaluator::strcFuncEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Node::recreate(node, TR::acall);
TR::Register *trgReg = TR::TreeEvaluator::directCallEvaluator(node, cg);
return trgReg;
}
TR::Register *OMR::Power::TreeEvaluator::dfloorEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Node * firstChild = node->getFirstChild();
TR::Register *srcReg = cg->evaluate(firstChild);
TR::Register *trgReg;
TR::Register *tmp2Reg;
TR::Register *tmp3Reg;
TR::Register *tmp4Reg;
TR::Register *tmp1Reg, *tmp5Reg;
TR::Node *const_node, *const_node_max;
if ((node->getOpCodeValue() == TR::dfloor) || (node->getOpCodeValue() == TR::dceil)){
trgReg = cg->allocateRegister(TR_FPR);
tmp2Reg = cg->allocateRegister(TR_FPR);
tmp3Reg = cg->allocateRegister(TR_FPR);
tmp4Reg = cg->allocateRegister(TR_FPR);
const_node = TR::Node::create(node, TR::dconst, 0);
if (node->getOpCodeValue() == TR::dceil){
const_node->setDouble(1.0);
}
else
const_node->setDouble(-1.0);
tmp1Reg = TR::TreeEvaluator::dconstEvaluator(const_node, cg);
const_node_max = TR::Node::create(node, TR::dconst, 0);
const_node_max->setDouble(CONSTANT64(0x10000000000000)); // 2**52
tmp5Reg = TR::TreeEvaluator::dconstEvaluator(const_node_max, cg);
}