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IdiomRecognition.cpp
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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 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] 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 "optimizer/IdiomRecognition.hpp"
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "codegen/CodeGenerator.hpp"
#include "env/FrontEnd.hpp"
#include "codegen/RecognizedMethods.hpp"
#include "compile/Compilation.hpp"
#include "compile/CompilationTypes.hpp"
#include "control/Options.hpp"
#include "control/Options_inlines.hpp"
#include "control/Recompilation.hpp"
#include "control/RecompilationInfo.hpp"
#include "cs2/bitvectr.h"
#include "env/CompilerEnv.hpp"
#include "env/StackMemoryRegion.hpp"
#include "env/TRMemory.hpp"
#include "il/Block.hpp"
#include "il/DataTypes.hpp"
#include "il/ILOpCodes.hpp"
#include "il/ILOps.hpp"
#include "il/MethodSymbol.hpp"
#include "il/Node.hpp"
#include "il/Node_inlines.hpp"
#include "il/Symbol.hpp"
#include "il/SymbolReference.hpp"
#include "il/TreeTop.hpp"
#include "il/TreeTop_inlines.hpp"
#include "infra/Assert.hpp"
#include "infra/BitVector.hpp"
#include "infra/Cfg.hpp"
#include "infra/Flags.hpp"
#include "infra/HashTab.hpp"
#include "infra/Link.hpp"
#include "infra/List.hpp"
#include "infra/SimpleRegex.hpp"
#include "infra/TRCfgEdge.hpp"
#include "infra/TRCfgNode.hpp"
#include "optimizer/IdiomRecognitionUtils.hpp"
#include "optimizer/LoopCanonicalizer.hpp"
#include "optimizer/Optimization_inlines.hpp"
#include "optimizer/OptimizationManager.hpp"
#include "optimizer/Optimizer.hpp"
#include "optimizer/Structure.hpp"
#include "optimizer/TransformUtil.hpp"
#include "optimizer/UseDefInfo.hpp"
#include "ras/Debug.hpp"
#include "omrformatconsts.h"
#if defined(J9VM_OPT_JITSERVER)
#include "env/JITServerAllocationRegion.hpp"
#endif
#define OPT_DETAILS "O^O NEWLOOPREDUCER: "
#define VERBOSE 0
#define STRESS_TEST 0
#define ALLOW_FAST_VERSIONED_LOOP 1
#define EXCLUDE_COLD_LOOP (!STRESS_TEST)
#define SHOW_CANDIDATES 0
#define IDIOM_SIZE_FACTOR 15
#define MAX_PREPARED_GRAPH (36+STRESS_TEST*5)
static TR_CISCGraph *preparedCISCGraphs[MAX_PREPARED_GRAPH];
static int32_t numPreparedCISCGraphs;
static TR_Hotness minimumHotnessPrepared;
#define SHOW_BCINDICES 1
#define SHOW_STATISTICS 1
/************************************/
/*********** ************/
/*********** TR_CISCNode ************/
/*********** ************/
/************************************/
void
TR_CISCNode::initializeMembers(uint32_t opc, uint16_t id, int16_t dagId, uint16_t ncfgs, uint16_t nchildren)
{
initializeLists();
_flags.clear();
setOpcode(opc);
_id = id;
_dagId = dagId;
_numChildren = nchildren;
_numSuccs = ncfgs;
_latestDest = 0;
_otherInfo = 0;
if (_ilOpCode.isStoreDirect()) setIsStoreDirect();
switch(opc)
{
case TR_ahconst:
setIsLightScreening();
// fall through
case TR_allconst:
case TR_variable:
case TR_variableORconst:
case TR_quasiConst:
case TR_quasiConst2:
case TR_arrayindex:
case TR_arraybase:
setIsNecessaryScreening();
break;
}
}
//*****************************************************************************************
// It analyzes pOpc and tOpc are equivalent.
// Note that it handles wildcard nodes as shown below.
//*****************************************************************************************
bool
TR_CISCNode::isEqualOpc(TR_CISCNode *t)
{
//TR_ASSERT((int)TR::NumIlOps == TR_variable, "assumption for reducing compilation time");
static_assert((int)TR::NumIlOps == TR_variable,
"assumption for reducing compilation time");
int32_t pOpc = _opcode;
int32_t tOpc = t->_opcode;
if (pOpc == tOpc) return true;
else if (pOpc > TR::NumIlOps) // Please see the above assumption
{
switch(pOpc)
{
case TR_booltable:
return (tOpc == TR::Case || t->_ilOpCode.isIf()) && !t->isOutsideOfLoop();
case TR_variableORconst:
return (tOpc == TR_variable || t->_ilOpCode.isLoadConst());
case TR_quasiConst2:
if (tOpc == TR::iloadi)
return !t->getHeadOfTrNode()->getSymbol()->isArrayShadowSymbol(); // true if non-array
// else fall through
case TR_quasiConst:
return (tOpc == TR_variable || t->_ilOpCode.isLoadConst() || tOpc == TR::arraylength);
case TR_iaddORisub:
return (tOpc == TR::iadd || tOpc == TR::isub);
case TR_conversion:
return (t->_ilOpCode.isConversion());
case TR_ifcmpall:
return (t->_ilOpCode.isIf());
case TR_ishrall:
return (tOpc == TR::ishr || tOpc == TR::iushr);
case TR_bitop1:
return (t->_ilOpCode.isAnd() || t->_ilOpCode.isOr() || t->_ilOpCode.isXor());
case TR_arrayindex:
return (tOpc == TR_variable || tOpc == TR::iadd);
case TR_arraybase:
return (tOpc == TR_variable || tOpc == TR::aloadi);
case TR_ahconst:
case TR_allconst:
return t->_ilOpCode.isLoadConst();
case TR_inbload:
return (t->_ilOpCode.isLoadIndirect() && !t->_ilOpCode.isByte());
case TR_inbstore:
return (t->_ilOpCode.isStoreIndirect() && !t->_ilOpCode.isByte());
case TR_indload:
return (t->_ilOpCode.isLoadIndirect());
case TR_indstore:
return (t->_ilOpCode.isStoreIndirect() || tOpc == TR::awrtbari);
case TR_ibcload:
return (t->_ilOpCode.isLoadIndirect() && (t->_ilOpCode.isByte() || (t->_ilOpCode.isShort() && t->_ilOpCode.isUnsigned())));
case TR_ibcstore:
return (t->_ilOpCode.isStoreIndirect() && (t->_ilOpCode.isByte() || (t->_ilOpCode.isShort() && t->_ilOpCode.isUnsigned())));
}
}
return false;
}
//*****************************************************************************************
// convert opcode to its name for debug print
//*****************************************************************************************
const char *
TR_CISCNode::getName(TR_CISCOps op, TR::Compilation * comp)
{
if (op < (TR_CISCOps)TR::NumIlOps)
{
TR::ILOpCode opCode;
opCode.setOpCodeValue((enum TR::ILOpCodes)op);
return opCode.getName();
}
switch(op)
{
case TR_variable: return "Var";
case TR_booltable: return "booltable";
case TR_entrynode: return "entrynode";
case TR_exitnode: return "exitnode";
case TR_ahconst: return "ahconst";
case TR_allconst: return "constall";
case TR_inbload: return "inbload";
case TR_inbstore: return "inbstore";
case TR_indload: return "indload";
case TR_indstore: return "indstore";
case TR_ibcload: return "ibcload";
case TR_ibcstore: return "ibcstore";
case TR_variableORconst: return "variableORconst";
case TR_quasiConst: return "quasiConst";
case TR_quasiConst2: return "quasiConst2";
case TR_iaddORisub: return "iaddORisub";
case TR_arrayindex: return "arrayindex";
case TR_arraybase: return "arraybase";
case TR_conversion: return "conversion";
case TR_ifcmpall: return "ifcmpall";
case TR_ishrall: return "ishrall";
case TR_bitop1: return "bitop1";
}
return "Unknown";
}
//*****************************************************************************************
// Debug print to file
//*****************************************************************************************
void
TR_CISCNode::dump(TR::FILE *pOutFile, TR::Compilation * comp)
{
int32_t i;
char buf[256];
const char *name = getName((TR_CISCOps)_opcode, comp);
if (isValidOtherInfo())
{
sprintf(buf, "%s %d", name, _otherInfo);
}
else
{
sprintf(buf, "%s", name);
}
traceMsg(comp, "[%p] %3d %2d%c %-11s", this, _id, _dagId, isOutsideOfLoop() ? ' ' : 'L', buf);
traceMsg(comp, " [");
for (i = 0; i < _numSuccs; i++)
{
traceMsg(comp, "%d",_succs[i]->_id);
if (i < _numSuccs-1) traceMsg(comp, " ");
}
traceMsg(comp, "]");
traceMsg(comp, " [");
for (i = 0; i < _numChildren; i++)
{
traceMsg(comp, "%d",_children[i]->_id);
if (i < _numChildren-1) traceMsg(comp, " ");
}
traceMsg(comp, "]");
ListIterator<TR_CISCNode> ci(&_chains);
TR_CISCNode *n;
if (!_chains.isEmpty())
{
traceMsg(comp, " chains[");
for (n = ci.getFirst(); n; n = ci.getNext())
{
traceMsg(comp, "%d ",n->_id);
}
traceMsg(comp, "]");
}
if (!_dest.isEmpty())
{
traceMsg(comp, " dest=");
ci.set(&_dest);
for (n = ci.getFirst(); n; n = ci.getNext())
{
traceMsg(comp, "%d ",n->_id);
}
}
if (!_hintChildren.isEmpty())
{
traceMsg(comp, " hint=");
ci.set(&_hintChildren);
for (n = ci.getFirst(); n; n = ci.getNext())
{
traceMsg(comp, "%d ",n->_id);
}
}
#if 0
if (!_preds.isEmpty())
{
ci.set(&_preds);
traceMsg(comp, " preds[");
for (n = ci.getFirst(); n; n = ci.getNext())
{
traceMsg(comp, "%d ",n->_id);
}
traceMsg(comp, "]");
}
#endif
if (isCISCNodeModified())
{
traceMsg(comp, "\t(Modified)");
}
if (isOptionalNode())
{
traceMsg(comp, "\t(Optional)");
}
// Print out the TR_Nodes that correspond with the given CISCNode.
if (getTrNodeInfo())
{
if (!getTrNodeInfo()->isEmpty())
{
traceMsg(comp, "\tTR::Node:[");
ListIterator<TrNodeInfo> ni(getTrNodeInfo());
for (TrNodeInfo *n = ni.getFirst(); n != NULL; n = ni.getNext())
{
traceMsg(comp, "%s,",comp->getDebug()->getName((TR::Node*)n->_node));
}
traceMsg(comp, "]");
}
}
traceMsg(comp, "\n");
}
//*****************************************************************************************
// Debug print to stdout
//*****************************************************************************************
void
TR_CISCNode::printStdout()
{
int32_t i;
char buf[256];
if (isValidOtherInfo())
{
sprintf(buf, "%d %d", _opcode, _otherInfo);
}
else
{
sprintf(buf, "%d", _opcode);
}
printf("[%p] %3d %2d%c %-11s", this, _id, _dagId, isOutsideOfLoop() ? ' ' : 'L', buf);
printf(" [");
for (i = 0; i < _numSuccs; i++)
{
printf("%d",_succs[i]->_id);
if (i < _numSuccs-1) printf(" ");
}
printf("]");
printf(" [");
for (i = 0; i < _numChildren; i++)
{
printf("%d",_children[i]->_id);
if (i < _numChildren-1) printf(" ");
}
printf("]");
ListIterator<TR_CISCNode> ci(&_chains);
TR_CISCNode *n;
if (!_chains.isEmpty())
{
printf(" chains[");
for (n = ci.getFirst(); n; n = ci.getNext())
{
printf("%d ",n->_id);
}
printf("]");
}
if (!_dest.isEmpty())
{
printf(" dest=");
ci.set(&_dest);
for (n = ci.getFirst(); n; n = ci.getNext())
{
printf("%d ",n->_id);
}
}
if (!_hintChildren.isEmpty())
{
printf(" hint=");
ci.set(&_hintChildren);
for (n = ci.getFirst(); n; n = ci.getNext())
{
printf("%d ",n->_id);
}
}
if (isCISCNodeModified())
{
printf("\t(Modified)");
}
if (isOptionalNode())
{
printf("\t(Optional)");
}
printf("\n");
}
//*****************************************************************************************
// It replaces the successor and maintains the predecessor of the original successor.
//*****************************************************************************************
void
TR_CISCNode::replaceSucc(uint32_t index, TR_CISCNode *to)
{
TR_ASSERT(index < _numSuccs, "TR_CISCNode::replaceSucc index out of range");
TR_CISCNode *old = _succs[index];
if (old)
{
old->_preds.remove(this);
}
setSucc(index, to);
}
//*****************************************************************************************
// It replaces the child and maintains the parent of the original child.
//*****************************************************************************************
void
TR_CISCNode::replaceChild(uint32_t index, TR_CISCNode *ch)
{
TR_ASSERT(index < _numChildren, "TR_CISCNode::replaceChild index out of range");
TR_CISCNode *org = _children[index];
if (org)
{
org->_parents.remove(this);
}
setChild(index, ch);
}
//*****************************************************************************************
// To sort out leaf nodes, these functions related to checkParent analyze whether ancestors
// of the pattern node and those of the target node are equivalent.
//*****************************************************************************************
#define DEBUG_CHECKPARENTS 0
#define DEPTH_CHECKPARENTS 7
#if 0 // recursive version, just for reference
bool
TR_CISCNode::checkParents(TR_CISCNode *const o, const int8_t level)
{
#if DEBUG_CHECKPARENTS
int i;
for (i = DEPTH_CHECKPARENTS-level; --i >= 0; ) traceMsg(comp(), " ");
traceMsg(comp(), "checkParents %d:%d...\n", _id, o->_id);
#endif
if (level > 0)
{
ListElement<TR_CISCNode> *ple;
for (ple = _parents.getListHead(); ple; ple = ple->getNextElement())
{
TR_CISCNode *const pn = ple->getData();
uint16_t pIndex = 0;
const bool commutative = pn->isCommutative();
if (!commutative)
{
for (; pIndex < pn->getNumChildren(); pIndex++ )
{
if (pn->getChild(pIndex) == this) break;
}
}
TR_ASSERT(pIndex < pn->getNumChildren(), "error!");
ListElement<TR_CISCNode> *tle;
const bool isPnParentsEmpty = pn->_parents.isEmpty();
const bool isPnOptional = pn->isOptionalNode();
for (tle = o->_parents.getListHead(); tle; tle = tle->getNextElement())
{
TR_CISCNode *const tn = tle->getData();
if (pn->isEqualOpc(tn))
{
if ((commutative || tn->getChild(pIndex) == o) &&
pn->checkParents(tn, level-1)) goto find;
}
else
{
if (tn->getIlOpCode().isStoreDirect())
{
if (tn->getChild(0) == o && !pn->isChildDirectlyConnected())
{
if (this->checkParents(tn->getChild(1), level-1)) goto find;
}
}
else
{ /* search one more depth */
ListElement<TR_CISCNode> *tcle;
for (tcle = tn->_parents.getListHead(); tcle; tcle = tcle->getNextElement())
{
if (pn->isEqualOpc(tcle->getData()) &&
(commutative || tcle->getData()->getChild(pIndex) == tn) &&
pn->checkParents(tcle->getData(), level-1)) goto find;
}
}
}
}
TR_ASSERT(!tle, "error");
if (isPnOptional)
{
if (isPnParentsEmpty ||
pn->isSkipParentsCheck() ||
pn->checkParents(o, level-1)) goto find;
}
#if DEBUG_CHECKPARENTS
for (i = DEPTH_CHECKPARENTS-level; --i >= 0; ) traceMsg(comp(), " ");
traceMsg(comp(), "checkParents %d:%d failed due to pid %d\n", _id, o->_id, pn->_id);
#endif
return false;
find:;
}
}
#if DEBUG_CHECKPARENTS
for (i = DEPTH_CHECKPARENTS-level; --i >= 0; ) traceMsg(comp(), " ");
traceMsg(comp(), "checkParents %d:%d succeed\n", _id, o->_id);
#endif
return true;
}
#endif
//*****************************************************************************************
// It recursively marks dead (negligible).
//*****************************************************************************************
void
TR_CISCNode::deadAllChildren()
{
int32_t i;
if (!getParents()->isSingleton() || // this node is multi-referenced or
_ilOpCode.canRaiseException() || // any side effectable instructions
_ilOpCode.isCall() ||
_ilOpCode.isReturn() ||
_ilOpCode.isStore() ||
_ilOpCode.isBranch()) return;
setIsNegligible();
for (i = _numChildren; --i >= 0; )
_children[i]->deadAllChildren();
}
//*****************************************************************************************
// This class is for creating non-recursive version of checkParents.
//*****************************************************************************************
struct TR_StackForCheckParents
{
TR_StackForCheckParents() {}
TR_StackForCheckParents(TR_CISCNode *p, TR_CISCNode *t,
ListElement<TR_CISCNode> *ple, ListElement<TR_CISCNode> *tle, ListElement<TR_CISCNode> *tcle,
TR_CISCNode *pn, TR_CISCNode *tn,
uint16_t pIndex, int8_t level, int8_t label)
{ initialize(p, t, ple, tle, tcle, pn, tn, pIndex, level, label); }
void initialize(TR_CISCNode *p, TR_CISCNode *t,
ListElement<TR_CISCNode> *ple, ListElement<TR_CISCNode> *tle, ListElement<TR_CISCNode> *tcle,
TR_CISCNode *pn, TR_CISCNode *tn,
uint16_t pIndex, int8_t level, int8_t label)
{
_p = p;
_t = t;
_ple = ple;
_tle = tle;
_tcle = tcle;
_pn = pn;
_tn = tn;
_pIndex = pIndex;
_level = level;
_label = label;
}
TR_CISCNode *_p;
TR_CISCNode *_t;
ListElement<TR_CISCNode> *_ple;
ListElement<TR_CISCNode> *_tle;
ListElement<TR_CISCNode> *_tcle;
TR_CISCNode *_pn;
TR_CISCNode *_tn;
uint16_t _pIndex;
int8_t _level;
int8_t _label;
};
//*****************************************************************************************
// It analyzes ancestors of p and those of t are equivalent.
// The maximum search depth can be given by "level".
// Note: There is a recursive version of this function named "checkParents" above, which
// is easier to understand.
//*****************************************************************************************
bool
TR_CISCNode::checkParentsNonRec(TR_CISCNode *p, TR_CISCNode *t, int8_t level, TR::Compilation *comp)
{
ListElement<TR_CISCNode> *ple = NULL;
ListElement<TR_CISCNode> *tle = NULL;
ListElement<TR_CISCNode> *tcle = NULL;
TR_CISCNode *pn = NULL;
TR_CISCNode *tn = NULL;
uint16_t pIndex;
bool ret;
TR_StackForCheckParents stackParents[DEPTH_CHECKPARENTS];
TR_StackForCheckParents *st;
const int8_t initial_level = level;
while(true)
{
first:
TR_CISCNode *parm1 = 0;
ret = true;
#if DEBUG_CHECKPARENTS
int32_t i;
for (i = initial_level-level; --i >= 0; ) traceMsg(comp, " ");
traceMsg(comp, "checkParents %d:%d...\n", p->_id, t->_id);
#endif
if (level > 0)
{
for (ple = p->_parents.getListHead(); ple; ple = ple->getNextElement())
{
pn = ple->getData();
pIndex = 0;
if (!pn->isCommutative())
{
for (; pIndex < pn->getNumChildren(); pIndex++ )
{
if (pn->getChild(pIndex) == p) break;
}
}
TR_ASSERT(pIndex < pn->getNumChildren(), "error!");
for (tle = t->_parents.getListHead(); tle; tle = tle->getNextElement())
{
tn = tle->getData();
TR_CISCNode *parm2;
parm1 = 0;
if (pn->isEqualOpc(tn))
{
if (pn->isCommutative() || tn->getChild(pIndex) == t)
{
parm1 = pn;
parm2 = tn;
}
}
else
{
if (tn->getIlOpCode().isStoreDirect())
{
if (tn->getChild(0) == t && !pn->isChildDirectlyConnected())
{
parm1 = p;
parm2 = tn->getChild(1);
}
}
else
{ /* search one more depth */
for (tcle = tn->_parents.getListHead(); tcle; tcle = tcle->getNextElement())
{
if (pn->isEqualOpc(tcle->getData()) &&
(pn->isCommutative() || tcle->getData()->getChild(pIndex) == tn))
{
level--;
st = stackParents + level;
st->initialize(p, t, ple, tle, tcle, pn, tn, pIndex, level+1, 0);
p = pn;
t = tcle->getData();
goto first;
label0:;
}
}
}
}
if (parm1)
{
level--;
st = stackParents + level;
st->initialize(p, t, ple, tle, tcle, pn, tn, pIndex, level+1, 1);
p = parm1;
t = parm2;
goto first;
label1:;
}
}
TR_ASSERT(!tle, "error");
if (pn->isOptionalNode())
{
if (!pn->_parents.isEmpty() && !pn->isSkipParentsCheck())
{
level--;
st = stackParents + level;
st->initialize(p, t, ple, tle, tcle, pn, tn, pIndex, level+1, 2);
p = pn;
//t = t;
goto first;
label2:;
}
else
goto find;
}
#if DEBUG_CHECKPARENTS
for (i = initial_level-level; --i >= 0; ) traceMsg(comp, " ");
traceMsg(comp, "checkParents %d:%d failed due to pid %d\n", p->_id, t->_id, pn->_id);
#endif
ret = false;
goto final;
find:;
}
}
ret = true;
#if DEBUG_CHECKPARENTS
for (i = initial_level-level; --i >= 0; ) traceMsg(comp, " ");
traceMsg(comp, "checkParents %d:%d succeed\n", p->_id, t->_id);
#endif
final:
if (level == initial_level) break; /* exit loop */
st = stackParents + level;
p = st->_p;
t = st->_t;
ple = st->_ple;
tle = st->_tle;
tcle = st->_tcle;
pn = st->_pn;
tn = st->_tn;
pIndex = st->_pIndex;
level = st->_level;
parm1 = 0;
if (ret) goto find;
else
{
if (st->_label == 0) goto label0;
else if (st->_label == 1) goto label1;
else goto label2;
}
}
return ret;
}
//*****************************************************************************************
// Swap successors and reverse the opcode of the branch
//*****************************************************************************************
void
TR_CISCNode::reverseBranchOpCodes()
{
TR_ASSERT(_opcode < TR::NumIlOps && _ilOpCode.isIf(), "error: not isIf");
TR_ASSERT(_numSuccs == 2, "error: _numSuccs != 2");
TR_CISCNode *swap = _succs[0];
_succs[0] = _succs[1];
_succs[1] = swap;
setOpcode(_ilOpCode.getOpCodeForReverseBranch());
}
//*****************************************************************************************
// Return whether this node and all nodes in the "_chains" are in the same loop body.
//*****************************************************************************************
bool
TR_CISCNode::checkDagIdInChains()
{
uint16_t thisDagID = _dagId;
ListIterator<TR_CISCNode> ci(&_chains);
TR_CISCNode *c;
for (c = ci.getFirst(); c; c = ci.getNext())
if (c->_dagId != thisDagID) return false;
return true;
}
//*****************************************************************************************
// Return TreeTop for getBranchDestination or fallthrough
//*****************************************************************************************
TR::TreeTop *
TR_CISCNode::getDestination(bool isFallThrough)
{
TR::TreeTop *ret;
TR::Node *nRepTrNode = getHeadOfTrNode();
if (getOpcode() != nRepTrNode->getOpCodeValue())
{
TR_ASSERT(getOpcode() == nRepTrNode->getOpCode().getOpCodeForReverseBranch(), "error");
isFallThrough = !isFallThrough;
}
if (isFallThrough)
{
for (ret = getHeadOfTreeTop()->getNextTreeTop();
ret->getNode()->getOpCodeValue() != TR::BBStart;
ret = ret->getNextTreeTop());
}
else
{
ret = nRepTrNode->getBranchDestination();
}
return ret;
}
/************************************/
/*********** ************/
/*********** TR_CISCHash ************/
/*********** ************/
/************************************/
TR_CISCNode *TR_CISCHash::find(uint64_t key)
{
TR_ASSERT(_numBuckets > 0, "error: _numBuckets == 0!");
uint32_t index = key % _numBuckets;
struct HashTableEntry *p;
for (p = _buckets[index]; p != 0; p = p->_next)
{
if (p->_key == key) return p->_node;
}
return 0;
}
bool
TR_CISCHash::add(uint64_t key, TR_CISCNode *node, bool checkExist)
{
TR_ASSERT(_numBuckets > 0, "error: _numBuckets == 0!");
uint32_t index = key % _numBuckets;
if (checkExist)
{
struct HashTableEntry *p;
for (p = _buckets[index]; p != 0; p = p->_next)
{
if (p->_key == key) return false;
}
}
struct HashTableEntry *newEntry = (struct HashTableEntry *)trMemory()->allocateMemory(sizeof(*newEntry), _allocationKind);
newEntry->_next = _buckets[index];
newEntry->_key = key;
newEntry->_node = node;
_buckets[index] = newEntry;
return true;
}
/********************************************/
/*********** ************/
/*********** TR_CISCGraphAspects ************/
/*********** ************/
/********************************************/
//*****************************************************************************************
// We used this property to exclude those idioms which are unlikely to be matched against
// the target loop to limit the extra compilation time.
// We can consider the nodes of an idiom, and if a graph is missing any of those nodes,
// we already know no topological embedding exists.
// For each idiom, we prepared a bit-vector that represents the required IL nodes.
// We compare the bit-vector of every idiom graph with that of the target graph to exclude
// the unlikely matched idioms.
//*****************************************************************************************
void
TR_CISCGraphAspects::setLoadAspects(uint32_t val, bool orExistAccess)
{
TR_ASSERT(val <= loadMasks, "error!");
if (orExistAccess && (val & 0xFF)) val |= existAccess;
set(val);
}
void
TR_CISCGraphAspects::setStoreAspects(uint32_t val, bool orExistAccess)
{
TR_ASSERT(val <= loadMasks, "error!");
if (orExistAccess && (val & 0xFF)) val |= existAccess;
set(val << storeShiftCount);
}
void
TR_CISCGraphAspects::modifyAspects()
{
uint32_t load = getLoadAspects();
uint32_t store = getStoreAspects();
uint32_t temp = load & store & 0xff;
if (temp) set(sameTypeLoadStore);
}
void
TR_CISCGraphAspects::print(TR::Compilation *comp, bool noaspects)
{
traceMsg(comp, "CISCGraph%sAspects is %08x\n",noaspects ? "No" : "", getValue());
}
void
TR_CISCGraphAspectsWithCounts::print(TR::Compilation *comp, bool noaspects)
{
traceMsg(comp, "CISCGraph%sAspects is %08x\n",noaspects ? "No" : "", getValue());
traceMsg(comp, "min counts: if=%d, indirectLoad=%d, indirectStore=%d\n",
_ifCount, _indirectLoadCount, _indirectStoreCount);
}
void
TR_CISCGraphAspectsWithCounts::setAspectsByOpcode(int opc)
{
switch(opc)
{
case TR_inbload:
setLoadAspects(existAccess | nbValue);
incIndirectLoadCount();
break;
case TR_inbstore:
setStoreAspects(existAccess | nbValue);
incIndirectStoreCount();
break;
case TR_ibcload:
case TR_indload:
setLoadAspects(existAccess);
incIndirectLoadCount();
break;
case TR_ibcstore:
case TR_indstore:
setStoreAspects(existAccess);
incIndirectStoreCount();
break;
case TR_ifcmpall:
incIfCount();
break;
case TR::ishr:
case TR::iushr:
case TR::lshr:
case TR::lushr:
set(shr);
break;
case TR::lmulh:
case TR::imulh:
case TR::imul:
case TR::lmul:
set(mul);
break;
case TR::irem:
case TR::lrem:
set(reminder);
break;
case TR::idiv:
case TR::ldiv:
set(division);
break;
case TR::BNDCHK:
set(bndchk);
break;
case TR::isub:
set(isub);
break;
case TR::iadd:
set(iadd);
break;
default:
if (opc < TR::NumIlOps)
{
TR::ILOpCode opCode;
opCode.setOpCodeValue((enum TR::ILOpCodes)opc);
if (opCode.isLoadIndirect())
{
setLoadAspects(existAccess | opCode.getSize());
incIndirectLoadCount();
}
else if (opCode.isStoreIndirect())
{
setStoreAspects(existAccess | opCode.getSize());
incIndirectStoreCount();
}
else if (opCode.isCall())
{
set(call);
}
else if (opCode.isIf() || opCode.isSwitch())
{
incIfCount();
}
else if (opCode.isAnd() || opCode.isOr() || opCode.isXor())
{
set(bitop1);
}