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Inliner.cpp
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Inliner.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 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
*******************************************************************************/
#ifdef J9ZTPF
#define __TPF_DO_NOT_MAP_ATOE_REMOVE
#endif
#include "optimizer/Inliner.hpp"
#include <algorithm>
#include <assert.h>
#include <limits.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <exception>
#include <vector>
#include "codegen/CodeGenerator.hpp"
#include "env/FrontEnd.hpp"
#include "env/KnownObjectTable.hpp"
#include "codegen/RecognizedMethods.hpp"
#include "compile/Compilation.hpp"
#include "compile/InlineBlock.hpp"
#include "compile/Method.hpp"
#include "compile/OSRData.hpp"
#include "compile/ResolvedMethod.hpp"
#include "compile/SymbolReferenceTable.hpp"
#include "compile/VirtualGuard.hpp"
#include "control/Options.hpp"
#include "control/Options_inlines.hpp"
#include "control/Recompilation.hpp"
#include "cs2/allocator.h"
#include "cs2/bitvectr.h"
#include "cs2/sparsrbit.h"
#include "env/ClassEnv.hpp"
#include "env/CompilerEnv.hpp"
#include "env/ObjectModel.hpp"
#include "env/PersistentInfo.hpp"
#include "env/StackMemoryRegion.hpp"
#include "env/TRMemory.hpp"
#include "env/jittypes.h"
#include "il/AliasSetInterface.hpp"
#include "il/AutomaticSymbol.hpp"
#include "il/Block.hpp"
#include "il/DataTypes.hpp"
#include "il/ILOpCodes.hpp"
#include "il/ILOps.hpp"
#include "il/LabelSymbol.hpp"
#include "il/MethodSymbol.hpp"
#include "il/Node.hpp"
#include "il/Node_inlines.hpp"
#include "il/ParameterSymbol.hpp"
#include "il/ResolvedMethodSymbol.hpp"
#include "il/StaticSymbol.hpp"
#include "il/Symbol.hpp"
#include "il/SymbolReference.hpp"
#include "il/TreeTop.hpp"
#include "il/TreeTop_inlines.hpp"
#include "ilgen/IlGenRequest.hpp"
#include "ilgen/IlGeneratorMethodDetails.hpp"
#include "ilgen/IlGeneratorMethodDetails_inlines.hpp"
#include "infra/Array.hpp"
#include "infra/Assert.hpp"
#include "infra/BitVector.hpp"
#include "infra/Cfg.hpp"
#include "infra/HashTab.hpp"
#include "infra/Link.hpp"
#include "infra/List.hpp"
#include "infra/Random.hpp"
#include "infra/SimpleRegex.hpp"
#include "infra/Stack.hpp"
#include "infra/CfgEdge.hpp"
#include "infra/CfgNode.hpp"
#include "infra/ILWalk.hpp"
#include "optimizer/CallInfo.hpp"
#include "optimizer/InlinerFailureReason.hpp"
#include "optimizer/Optimization.hpp"
#include "optimizer/OptimizationManager.hpp"
#include "optimizer/Optimizations.hpp"
#include "optimizer/Optimizer.hpp"
#include "optimizer/PreExistence.hpp"
#include "optimizer/RematTools.hpp"
#include "optimizer/Structure.hpp"
#include "optimizer/StructuralAnalysis.hpp"
#include "ras/Debug.hpp"
#include "ras/DebugCounter.hpp"
#include "ras/LogTracer.hpp"
#include "runtime/Runtime.hpp"
#ifdef J9_PROJECT_SPECIFIC
#include "env/VMJ9.h"
#endif
namespace TR { class SimpleRegex; }
int32_t *NumInlinedMethods = NULL;
int32_t *InlinedSizes = NULL;
#define OPT_DETAILS "O^O INLINER: "
// == Hack markers ==
// To conserve owning method indexes, we share TR_ResolvedMethods even where
// the owning method differs. Usually that is done only for methods that the
// inliner never sees, but if we get aggressive and share TR_ResolvedMethods
// that are exposed to the inliner, then the inliner needs to make sure it
// doesn't rely on the "owning method" accurately representing the calling method.
//
// This is a fragile design that needs some more thought. We should either
// eliminate the limitations that motivate sharing in the first place, or else
// take the time to modify inliner (and everyone else) so it doesn't rely on
// owning method information to indicate the caller.
//
// For now, we mark such code with this macro.
//
#define OWNING_METHOD_MAY_NOT_BE_THE_CALLER (1)
#define MIN_NUM_CALLERS 20
#define MIN_FAN_IN_SIZE 50
#define SIZE_MULTIPLIER 4
#define FANIN_OTHER_BUCKET_THRESHOLD 0.5
#undef TRACE_CSI_IN_INLINER
bool rematerializeConstant(TR::Node *node, TR::Compilation *comp);
static bool isWarm(TR::Compilation *comp)
{
return comp->getMethodHotness() >= warm;
}
static bool isHot(TR::Compilation *comp)
{
return comp->getMethodHotness() >= hot;
}
static bool isScorching(TR::Compilation *comp)
{
return ((comp->getMethodHotness() >= scorching) || ((comp->getMethodHotness() >= veryHot) && comp->isProfilingCompilation())) ;
}
static bool succAndPredAreNotOSRBlocks(TR::CFGEdge * edge)
{
return
!toBlock(edge->getTo())->isOSRCodeBlock() &&
!toBlock(edge->getFrom())->isOSRCodeBlock() &&
!toBlock(edge->getTo())->isOSRCatchBlock() &&
!toBlock(edge->getFrom())->isOSRCatchBlock();
}
static bool succIsOSRCatchBlock(TR::CFGEdge * edge)
{
return toBlock(edge->getTo())->isOSRCatchBlock();
}
int32_t
OMR_InlinerPolicy::getInitialBytecodeSize(TR::ResolvedMethodSymbol * methodSymbol, TR::Compilation *comp)
{
return getInitialBytecodeSize(methodSymbol->getResolvedMethod(),methodSymbol, comp);
}
int32_t
OMR_InlinerPolicy::getInitialBytecodeSize(TR_ResolvedMethod *feMethod, TR::ResolvedMethodSymbol * methodSymbol, TR::Compilation *comp)
{
int32_t size = feMethod->maxBytecodeIndex();
if (!comp->getOption(TR_DisableAdaptiveDumbInliner))
{
if (methodSymbol && !methodSymbol->mayHaveInlineableCall() && size <= 5) // favor the inlining of methods that are very small
size = 1;
}
TR_ASSERT(size > 0, "size cannot be zero because it is used as a divisor");
return size;
}
TR::DataType getStoreType(TR::Node *store, TR::Symbol *addrSymbol, TR::Compilation *comp)
{
TR::DataType storeType = addrSymbol->getDataType();
return storeType;
}
TR_TrivialInliner::TR_TrivialInliner(TR::OptimizationManager *manager)
: TR::Optimization(manager)
{}
int32_t TR_TrivialInliner::perform()
{
comp()->generateAccurateNodeCount();
TR::ResolvedMethodSymbol * sym = comp()->getMethodSymbol();
if (sym->mayHaveInlineableCall() && optimizer()->isEnabled(OMR::inlining))
{
uint32_t initialSize = comp()->getOptions()->getTrivialInlinerMaxSize();;
if (comp()->getOption(TR_Randomize) || comp()->getOption(TR_VerbosePseudoRandom))
{
// In the following we ask the global cmdLineOptions about the getTrivialInlinerMaxSize()
// because the result of convertNonDeterministicInput is cached the first time is executed
// and don't want this result to be determined by the first compilation that comes through
static uint32_t defaultRandomSize = comp()->convertNonDeterministicInput(TR::Options::getCmdLineOptions()->getTrivialInlinerMaxSize(), 30, randomGenerator(), 0);
initialSize = defaultRandomSize;
}
initialSize = isHot(comp()) ? initialSize * 2 : initialSize;
TR_DumbInliner inliner(optimizer(), this, initialSize);
inliner.performInlining(sym);
}
return 1; // cost??
}
const char *
TR_TrivialInliner::optDetailString() const throw()
{
return "O^O TRIVIAL INLINER: ";
}
//---------------------------------------------------------------------
// TR_InlinerBase
//---------------------------------------------------------------------
TR_InlinerBase::TR_InlinerBase(TR::Optimizer * optimizer, TR::Optimization *optimization)
: TR_HasRandomGenerator(optimizer->comp()),
_visitCount(optimizer->comp()->incVisitCount()),
_inliningAsWeWalk(false),
_optimizer(optimizer),
_trMemory(optimizer->comp()->trMemory()),
_availableTemps(_trMemory),
_availableBasicBlockTemps(_trMemory),
_storeToCachedPrivateStatic(NULL),
_disableTailRecursion(false),
_currentNumberOfNodes(optimizer->comp()->getAccurateNodeCount()),
_disableInnerPrex(false),
_aggressivelyInlineInLoops(false)
{
_policy = optimization->manager()->getOptPolicy() ? static_cast<OMR_InlinerPolicy*>(optimization->manager()->getOptPolicy()) : optimizer->getInlinerPolicy();
_util = optimizer->getInlinerUtil();
_policy->setInliner(this);
_util->setInliner(this);
if (!optimizer->isEnabled(OMR::innerPreexistence))
_disableInnerPrex = true;
setInlineVirtuals(true);
if (optimizer->getInlineSynchronized())
setInlineSynchronized(true);
_tracer = _util->getInlinerTracer(optimization);
_maxRecursiveCallByteCodeSizeEstimate=0;
_callerWeightLimit=0;
_methodByteCodeSizeThreshold=0;
_methodInColdBlockByteCodeSizeThreshold=0;
_methodInWarmBlockByteCodeSizeThreshold=0;
_nodeCountThreshold=0;
_maxInliningCallSites=0;
_numAsyncChecks=0;
_isInLoop = false;
_EDODisableInlinedProfilingInfo = false;
setInlineThresholds(comp()->getMethodSymbol());
}
void
TR_InlinerBase::setSizeThreshold(uint32_t size)
{
// This method is used to increase the threshold when inlining from places other than the Inliner. ex escape analysis, value prop, etc.
_methodByteCodeSizeThreshold = size;
heuristicTrace(tracer(),"Setting method size threshold (_methodByteCodeSizeThreshold) to %d\n",_methodByteCodeSizeThreshold);
}
void
OMR_InlinerPolicy::determineInliningHeuristic(TR::ResolvedMethodSymbol *callerSymbol)
{
return;
}
void
TR_InlinerBase::setInlineThresholds(TR::ResolvedMethodSymbol *callerSymbol)
{
int32_t size = getPolicy()->getInitialBytecodeSize(callerSymbol, comp());
getPolicy()->determineInliningHeuristic(callerSymbol);
//
// !!!!! Setting default thresholds for compilation.
//
if (isScorching(comp())) _callerWeightLimit = std::max(1500, size * 2);
else if (isHot(comp())) _callerWeightLimit = std::max(1500, size + (size >> 2));
else if (size < 125) _callerWeightLimit = 250;
else if (size < 700) _callerWeightLimit = std::max(700, size + (size >> 2));
else _callerWeightLimit = size + (size >> 3);
_callerWeightLimit -= size;
_nodeCountThreshold = 16000;
_methodInWarmBlockByteCodeSizeThreshold = _methodByteCodeSizeThreshold = 155;
_methodInColdBlockByteCodeSizeThreshold = 30;
_maxInliningCallSites = 4095;
_maxRecursiveCallByteCodeSizeEstimate = 1024;
if (comp()->getNodeCount() > _nodeCountThreshold)
{
_nodeCountThreshold = comp()->getNodeCount() * (1.05F); // allow a little bit of inlining anyways to get smaller methods
}
// Code That should go to its frontend
getUtil()->adjustCallerWeightLimit(callerSymbol, _callerWeightLimit);
getUtil()->adjustMethodByteCodeSizeThreshold(callerSymbol, _methodByteCodeSizeThreshold);
// let the FrontEnds have a chance to tweak inlining thresholds
getUtil()->refineInliningThresholds(comp(), _callerWeightLimit, _maxRecursiveCallByteCodeSizeEstimate, _methodByteCodeSizeThreshold,
_methodInWarmBlockByteCodeSizeThreshold, _methodInColdBlockByteCodeSizeThreshold, _nodeCountThreshold, size);
// Possible env variable overrides
static const char *a = feGetEnv("TR_MethodByteCodeSizeThreshold");
if (a)
_methodByteCodeSizeThreshold = atoi(a);
static const char *b = feGetEnv("TR_MethodInWarmBlockByteCodeSizeThreshold");
if (b)
_methodInWarmBlockByteCodeSizeThreshold = atoi(b);
static const char *c = feGetEnv("TR_MethodInColdBlockByteCodeSizeThreshold");
if (c)
_methodInColdBlockByteCodeSizeThreshold = atoi(c);
static const char *d = feGetEnv("TR_CallerWeightLimit");
if (d)
_callerWeightLimit = atoi(d);
static const char *e = feGetEnv("TR_NodeCountThreshold");
if (e)
_nodeCountThreshold = atoi(e);
// Under voluntary OSR, OSR blocks and additional stores can
// significantly increase the node count, particularly dead stores
// in OSRCodeBlocks. To maintain the same inlining behaviour, the
// threshold must be increased.
//
// The compile time overhead of this threshold increase has been tested
// and was not significant, as this threshold is typically only reached
// in hot or above compiles.
if (comp()->getOption(TR_EnableOSR) && comp()->getOSRMode() == TR::voluntaryOSR && comp()->supportsInduceOSR())
{
static const char *f = feGetEnv("TR_OSRNodeCountThreshold");
if (f)
_nodeCountThreshold = atoi(f);
else
_nodeCountThreshold *= 2;
}
//call random functions to allow randomness to change limits
if (comp()->getOption(TR_Randomize))
{
_nodeCountThreshold = (uint32_t)randomInt(32000);
_methodByteCodeSizeThreshold = comp()->convertNonDeterministicInput( _methodByteCodeSizeThreshold, 500, randomGenerator(), 0);
traceMsg(comp(),"\nTR_Randomize Enabled||TR_InlinerBase::inlineCallTarget, SeedValue:%d", comp()->getOptions()->getRandomSeed());
}
heuristicTrace(tracer(),"Inlining Limits:\n\tCaller Side Weight Limit (_callerWeightLimit) = %d \n\tCall Graph Size Threshold (_maxRecursiveCallByteCodeSizeEstimate) = %d "
"\n\tMethod size threshold (_methodByteCodeSizeThreshold) = %d \n\tMethod size threshold for warm (and above) compiles (_methodInWarmBlockByteCodeSizeThreshold) = %d"
"\n\tsize threshold for cold Calls (_methodInColdBlockByteCodeSizeThreshold) = %d\n\tNode Count Threshold (_nodeCountThreshold) = %d "
"\n\tSites Size (_maxInliningCallSites) = %d"
,_callerWeightLimit,_maxRecursiveCallByteCodeSizeEstimate,_methodByteCodeSizeThreshold,_methodInWarmBlockByteCodeSizeThreshold,_methodInColdBlockByteCodeSizeThreshold,_nodeCountThreshold,_maxInliningCallSites);
}
/**
* Go through each OSR code block b.
*
* 1) If b corresponds to the top caller (root of the call tree), it doesn't do
* anything because we have already implanted, during ilgen, a TR::igoto at
* the end of b which transfers control back to the VM.
* 2) Otherwise, replace the last treetop of b (which must be a goto or a
* return) to a goto to the OSR code block of the caller, and also make the
* corresponding changes to the CFG.
*/
void
TR_InlinerBase::linkOSRCodeBlocks()
{
TR_OSRCompilationData* compData = comp()->getOSRCompilationData();
const TR_Array<TR_OSRMethodData *>& methodDataArray = compData->getOSRMethodDataArray();
for (intptr_t i = 0; i < methodDataArray.size(); ++i)
{
TR_OSRMethodData *osrMethodData = methodDataArray[i];
if (osrMethodData == NULL
|| osrMethodData->getOSRCodeBlock() == NULL
|| osrMethodData->getInlinedSiteIndex() == -1
|| osrMethodData->linkedToCaller())
continue;
//For a non-top-level caller, we need to replace the return at the end of the OSR code block
//with a goto to the OSR code block of the caller
TR::Block *calleeOSRCodeBlock = osrMethodData->getOSRCodeBlock();
if (calleeOSRCodeBlock->isUnreachable())
continue;
TR::TreeTop* lastTT = calleeOSRCodeBlock->getLastRealTreeTop();
TR::Node* lastNode = lastTT->getNode();
TR_ASSERT(lastNode->getOpCode().isGoto() || lastNode->getOpCode().isReturn(),
"last treetop of a non-top-level caller OSR code block is neither a goto nor a return\n");
TR::Block *callerOSRCodeBlock = compData->findCallerOSRMethodData(osrMethodData)->getOSRCodeBlock();
TR_ASSERT(callerOSRCodeBlock != NULL, "caller's osr code block is empty\n");
TR::Node *gotoNode =
TR::Node::create(lastNode, TR::Goto, 0, callerOSRCodeBlock->getEntry());
TR_ASSERT((calleeOSRCodeBlock->getSuccessors().size() == 1), "calleeOSRCodeBlock %d(%x) has zero or more than one successor\n", calleeOSRCodeBlock->getNumber(), calleeOSRCodeBlock);
comp()->getFlowGraph()->removeEdge(calleeOSRCodeBlock->getSuccessors().front());
lastTT->unlink(true);
calleeOSRCodeBlock->append(TR::TreeTop::create(comp(), gotoNode));
comp()->getFlowGraph()->addEdge(calleeOSRCodeBlock, callerOSRCodeBlock);
osrMethodData->setLinkedToCaller(true);
}
}
void
TR_InlinerBase::performInlining(TR::ResolvedMethodSymbol * callerSymbol)
{
TR::StackMemoryRegion stackMemoryRegion(*trMemory());
TR_InnerPreexistenceInfo *innerPrexInfo = getUtil()->createInnerPrexInfo(comp(), callerSymbol, 0, 0, 0, TR_NoGuard);
bool inlinedSite = inlineCallTargets(callerSymbol, 0, innerPrexInfo);
if (comp()->getOption(TR_EnableOSR))
{
linkOSRCodeBlocks();
}
if (inlinedSite && comp()->trace(OMR::inlining))
{
traceMsg(comp(), "inlined some calls for method %s\n", comp()->signature());
}
cleanup(callerSymbol, inlinedSite);
if (debug("dumpInitialTrees") || comp()->getOption(TR_TraceTrees))
comp()->dumpMethodTrees("Post Inlining Trees");
}
void
TR_InlinerBase::cleanup(TR::ResolvedMethodSymbol * callerSymbol, bool inlinedSite)
{
comp()->resetInlineDepth();
if (inlinedSite)
{
callerSymbol->getFlowGraph()->removeUnreachableBlocks();
}
comp()->getSymRefTab()->clearAvailableAutos();
if (inlinedSite)
{
_optimizer->setUseDefInfo(NULL);
_optimizer->setValueNumberInfo(NULL);
_optimizer->setRequestOptimization(OMR::catchBlockRemoval);
_optimizer->setRequestOptimization(OMR::globalValuePropagation);
_optimizer->setRequestOptimization(OMR::eachExpensiveGlobalValuePropagationGroup);
_optimizer->setAliasSetsAreValid(false, true /*reset for WCode as well */);
}
}
bool
OMR_InlinerPolicy::mustBeInlinedEvenInDebug(TR_ResolvedMethod * calleeMethod, TR::TreeTop *callNodeTreeTop)
{
return false;
}
bool
TR_InlinerBase::alwaysWorthInlining(TR_ResolvedMethod * calleeMethod, TR::Node *callNode)
{
return getPolicy()->alwaysWorthInlining(calleeMethod, callNode);
}
bool
OMR_InlinerPolicy::alwaysWorthInlining(TR_ResolvedMethod * calleeMethod, TR::Node *callNode)
{
return false;
}
bool
TR_InlinerBase::exceedsSizeThreshold(TR_CallSite *callsite, int bytecodeSize, TR::Block * block, TR_ByteCodeInfo & bcInfo,
int32_t numLocals, TR_ResolvedMethod * callerResolvedMethod, TR_ResolvedMethod * calleeResolvedMethod,
TR::Node *callNode, bool allConsts)
{
if (alwaysWorthInlining(calleeResolvedMethod, callNode))
return false;
heuristicTrace(tracer(),"### Checking inliner base sizeThreshold. bytecodeSize = %d, block = %p, numLocals = %p,"
"callerResolvedMethod = %s, calleeResolvedMethod = %s",
bytecodeSize, block,numLocals,tracer()->traceSignature(callerResolvedMethod),
tracer()->traceSignature(calleeResolvedMethod));
int32_t blockFrequency = 0;
int32_t borderFrequency;
int32_t coldBorderFrequency; // only used in TR_MultipleCallTargetInliner::exceedsSizeThreshold (to date)
getBorderFrequencies(borderFrequency, coldBorderFrequency, calleeResolvedMethod, callNode);
OMR_InlinerPolicy *inlinerPolicy = getPolicy();
if (block)
{
blockFrequency = comp()->convertNonDeterministicInput(block->getFrequency(), MAX_BLOCK_COUNT + MAX_COLD_BLOCK_COUNT, randomGenerator(), 0);
if (allowBiggerMethods())
{
static const char * p = feGetEnv("TR_HotBorderFrequency");
if (p)
{
borderFrequency = atoi(p);
}
if (blockFrequency > borderFrequency)
{
int32_t oldSize = 0;
if (comp()->trace(OMR::inlining))
oldSize = bytecodeSize;
bytecodeSize = scaleSizeBasedOnBlockFrequency(bytecodeSize, blockFrequency, borderFrequency, calleeResolvedMethod, callNode);
if (comp()->trace(OMR::inlining))
heuristicTrace(tracer(),"exceedsSizeThreshold: Scaled down size for call block_%d from %d to %d", block->getNumber(), oldSize, bytecodeSize);
}
}
}
else if (getPolicy()->aggressiveSmallAppOpts())
{
getUtil()->adjustByteCodeSize(calleeResolvedMethod, _isInLoop, block, bytecodeSize);
}
else
{
if (comp()->trace(OMR::inlining))
heuristicTrace(tracer(),"exceedsSizeThreshold: No block passed in");
}
int32_t inlineThreshold = _methodByteCodeSizeThreshold;
if (comp()->isServerInlining())
{
if (blockFrequency > borderFrequency)
inlineThreshold = 200;
}
// reduce size if your args are consts
if (callNode)
{
heuristicTrace(tracer(),"In ExceedsSizeThreshold. Reducing size from %d",bytecodeSize);
int32_t originalbcSize = bytecodeSize;
uint32_t numArgs = callNode->getNumChildren();
bool allconstsfromNode = true;
uint32_t i = callNode->getFirstArgumentIndex();
if ( callNode->getOpCode().isCall() &&
!callNode->getSymbolReference()->isUnresolved() &&
callNode->getSymbolReference()->getSymbol()->getMethodSymbol() &&
!callNode->getSymbolReference()->getSymbol()->castToMethodSymbol()->isHelper() &&
!callNode->getSymbolReference()->getSymbol()->castToMethodSymbol()->isSystemLinkageDispatch() &&
!callNode->getSymbolReference()->getSymbol()->castToMethodSymbol()->isStatic() )
++i;
uint32_t numConstArgs=0;
uint32_t numNonConstArgs=0;
for (; i < numArgs; ++i)
{
// printf("callNode = %p\n");fflush(stdout);
// printf("callNode->getOpCode().isCall() = %p\n");fflush(stdout);
// printf("callNode->getSymbolReference() = %p\n");fflush(stdout);
TR::Node * arg = callNode->getChild(i);
if (arg->getOpCode().isLoadConst())
{
heuristicTrace(tracer(),"Node %p is load const\n",arg);
bytecodeSize = bytecodeSize - (bytecodeSize/10);
++numConstArgs;
}
else if (arg->getOpCodeValue() == TR::aload && arg->getSymbolReference()->getSymbol()->isConstObjectRef())
{
heuristicTrace(tracer(),"Node %p is aload const\n",arg);
bytecodeSize = bytecodeSize - (bytecodeSize/10);
++numConstArgs;
}
else
{
heuristicTrace(tracer(),"Node %p is not const\n",arg);
allconstsfromNode = false;
++numNonConstArgs;
}
}
if (!allconstsfromNode)
{
if ( _isInLoop && originalbcSize > inlineThreshold)
{
if (numConstArgs > 0 && (numConstArgs + numNonConstArgs) > 0 )
bytecodeSize = (numConstArgs * originalbcSize) / (numConstArgs + numNonConstArgs) ;
}
else
bytecodeSize = originalbcSize;
}
else if ( bytecodeSize < originalbcSize && originalbcSize > 100)
{
}
heuristicTrace(tracer()," to %d because of const arguments",bytecodeSize);
}
else if (allConsts)
{
heuristicTrace(tracer(), "In ExceedsSizeThreshold. Reducing size from %d", bytecodeSize);
int32_t originalbcSize = bytecodeSize;
int32_t numArgs = calleeResolvedMethod->numberOfExplicitParameters();
for (int32_t i=0 ; i < numArgs; ++i)
{
bytecodeSize = bytecodeSize - (bytecodeSize / 10);
}
heuristicTrace(tracer()," to %d because of const arguments",bytecodeSize);
}
if (inlineThreshold && (uint32_t)bytecodeSize > inlineThreshold)
{
TR::Options::INLINE_calleeToBig ++;
TR::Options::INLINE_calleeToBigSum += bytecodeSize;
if (block)
{
TR::DebugCounter::prependDebugCounter(comp(), "inliner.callSites/failed/calleeHasTooManyBytecodes", block->getFirstRealTreeTop());
TR::DebugCounter::prependDebugCounter(comp(), "inliner.callSites/failed/calleeHasTooManyBytecodes:#bytecodeSize", block->getFirstRealTreeTop(), bytecodeSize);
TR::DebugCounter::prependDebugCounter(comp(), "inliner.callSites/failed/calleeHasTooManyBytecodes:#excess", block->getFirstRealTreeTop(), bytecodeSize - inlineThreshold);
TR::DebugCounter::prependDebugCounter(comp(), "inliner.callSites/failed/calleeHasTooManyBytecodes:#localsInCallee", block->getFirstRealTreeTop(), numLocals);
}
heuristicTrace(tracer(),"### Exceeding size threshold because bytecodeSize %d > inlineThreshold %d ",bytecodeSize, inlineThreshold);
return true; // Exceeds size threshold
}
heuristicTrace(tracer(),"### Did not exceed size threshold, bytecodeSize %d <= inlineThreshold %d ",bytecodeSize, inlineThreshold);
return false; // Does not exceed threshold
}
void
TR_InlinerBase::createParmMap(TR::ResolvedMethodSymbol *calleeSymbol, TR_LinkHead<TR_ParameterMapping> &map)
{
ListIterator<TR::ParameterSymbol> parms(&calleeSymbol->getParameterList());
for (TR::ParameterSymbol * p = parms.getFirst(); p; p = parms.getNext())
{
int32_t offset = p->getParameterOffset();
TR_ParameterMapping* currPM = map.getFirst(), * prevPM = 0;
for (; currPM && offset > currPM->_parmSymbol->getParameterOffset(); prevPM = currPM, currPM = currPM->getNext())
;
map.insertAfter(prevPM, new (trStackMemory()) TR_ParameterMapping(p));
}
}
bool
TR_InlinerBase::inlineRecognizedMethod(TR::RecognizedMethod method)
{
return getPolicy()->inlineRecognizedMethod(method);
}
bool
OMR_InlinerPolicy::inlineRecognizedMethod(TR::RecognizedMethod method)
{
return false;
}
// only dumbinliner uses this and includes checking for variable initialization
bool
TR_DumbInliner::tryToInline(char *message, TR_CallTarget *calltarget)
{
TR_ResolvedMethod *method = calltarget->_calleeSymbol->getResolvedMethod();
if (getPolicy()->tryToInline(calltarget,NULL,true))
{
if (comp()->trace(OMR::inlining))
traceMsg(comp(), "tryToInline pattern matched; %s for %s\n", message, method->signature(comp()->trMemory()));
return true;
}
return false;
}
//general tryToInline methods
bool
OMR_InlinerPolicy::tryToInlineGeneral(TR_CallTarget * calltarget, TR_CallStack * callStack, bool toInline)
{
const char * signature = calltarget->_calleeMethod->signature(comp()->trMemory());
TR::SimpleRegex * regex = NULL;
if (toInline)
regex=comp()->getOptions()->getTryToInline();
else
regex=comp()->getOptions()->getDontInline();
if (regex && TR::SimpleRegex::match(regex, calltarget->_calleeMethod))
{
if (comp()->trace(OMR::inlining))
{
traceMsg(comp(), toInline?"Inliner: tryToInline pattern matched, ":"Inliner: dontInline pattern matched, ");
traceMsg(comp(), "signature: %s\n", signature);
}
return true;
}
if (callStack && callStack->_inlineFilters)
{
TR_FilterBST *filterInfo = NULL;
TR::CompilationFilters * inlineFilters = NULL;
inlineFilters=callStack->_inlineFilters;
if (inlineFilters)
{
bool inclusive=comp()->getDebug()->methodSigCanBeFound(signature, inlineFilters, filterInfo,
calltarget->_calleeMethod->convertToMethod()->methodType());
if (filterInfo)
{
if (toInline && inclusive)
return true;
if (!toInline && !inclusive)
return true;
}
}
}
// consider the global dontInline
{
if (!toInline)
{
TR_FilterBST *filterInfo = NULL;
TR::CompilationFilters * inlineFilters = NULL;
if (TR::Options::getDebug())
{
inlineFilters=TR::Options::getDebug()->getInlineFilters();
}
if (inlineFilters)
{
bool inclusive=comp()->getDebug()->methodSigCanBeFound(signature, inlineFilters, filterInfo,
calltarget->_calleeMethod->convertToMethod()->methodType());
if (filterInfo)
{
if (!inclusive)
return true;
}
}
}
}
return false;
}
bool
OMR_InlinerPolicy::tryToInline(TR_CallTarget * calltarget, TR_CallStack * callStack, bool toInline)
{
return tryToInlineGeneral(calltarget, callStack, toInline);
}
//---------------------------------------------------------------------
// TR_CallStack
//---------------------------------------------------------------------
TR_CallStack::TR_CallStack(
TR::Compilation * c,
TR::ResolvedMethodSymbol * methodSymbol, TR_ResolvedMethod * method,
TR_CallStack * nextCallStack, int32_t maxCallSize, bool safeToAddSymRefs)
: TR_Link<TR_CallStack>(nextCallStack),
_comp(c), _trMemory(c->trMemory()),
_methodSymbol(methodSymbol),
_method(method),
_currentCallNode(NULL),
_maxCallSize(maxCallSize),
_inALoop(nextCallStack ? nextCallStack->_inALoop : 0),
_alwaysCalled(nextCallStack ? nextCallStack->_alwaysCalled : 0),
_autos(c->trMemory()),
_temps(c->trMemory()),
_injectedBasicBlockTemps(c->trMemory()),
_inlineFilters(NULL),
_blockInfo(0),
_safeToAddSymRefs(safeToAddSymRefs)
{
TR_FilterBST *filterInfo = NULL;
TR::CompilationFilters * inlineFilters = NULL;
if (!nextCallStack)
{
if (TR::Options::getDebug())
inlineFilters = TR::Options::getDebug()->getInlineFilters();
if (inlineFilters)
{
bool inclusive = comp()->getDebug()->methodSigCanBeFound(_method->signature(comp()->trMemory()), inlineFilters, filterInfo,
_method->convertToMethod()->methodType());
if (filterInfo)
{
if (!inclusive)
{
_inlineFilters = filterInfo->subGroup;
}
}
}
}
else
{
if (nextCallStack->_inlineFilters)
inlineFilters = nextCallStack->_inlineFilters;
if (inlineFilters)
{
bool inclusive = comp()->getDebug()->methodSigCanBeFound(_method->signature(comp()->trMemory()), inlineFilters, filterInfo,
_method->convertToMethod()->methodType());
if (filterInfo)
{
if (inclusive)
{
_inlineFilters = filterInfo->subGroup;
}
}
}
}
}
void TR_CallStack::commit()
{
ListIterator<TR::AutomaticSymbol> autos(&_autos);
ListIterator<TR::SymbolReference> temps(&_temps);
ListIterator<TR::SymbolReference> injectedBasicBlockTemps(&_injectedBasicBlockTemps);
TR::AutomaticSymbol * a = autos.getFirst();
TR::SymbolReference * temp = temps.getFirst();
TR::SymbolReference * injectedBasicBlockTemp = injectedBasicBlockTemps.getFirst();
if (getNext())
{
for (; a; a = autos.getNext())
getNext()->_autos.add(a);
for (; temp; temp = temps.getNext())
getNext()->_temps.add(temp);
for (; injectedBasicBlockTemp; injectedBasicBlockTemp = injectedBasicBlockTemps.getNext())
getNext()->_injectedBasicBlockTemps.add(injectedBasicBlockTemp);
}
else
{
TR_ASSERT(_methodSymbol, "_methodSymbol has not been set");
//TR_ASSERT(!temp, "temps should have been added by a call to makeTempsAvailable");
for (; a; a = autos.getNext())
_methodSymbol->addAutomatic(a);
for (; injectedBasicBlockTemp; injectedBasicBlockTemp = injectedBasicBlockTemps.getNext())
_methodSymbol->addAutomatic(injectedBasicBlockTemp->getSymbol()->castToAutoSymbol());
}
//to make an assert in the destructor work
_autos.deleteAll();
_temps.deleteAll();
_injectedBasicBlockTemps.deleteAll();
}
TR_CallStack::~TR_CallStack()
{
//::commit is supposed to clear up the lists after everything has been propagated to a caller
//if there are still some residual symRefs left it means that we missed a call to commit somewhere
#if !defined(AIXPPC)
TR_ASSERT(std::uncaught_exception() || (_autos.isEmpty() && _temps.isEmpty() && _injectedBasicBlockTemps.isEmpty()), "lists should have been emptied by TR_CallStack::commit");
#endif
}
void
TR_CallStack::addAutomatic(TR::AutomaticSymbol * a)
{
TR_ASSERT(_safeToAddSymRefs, "make sure a constructed callStack is committed then add _safeToAddSymRefs to your c-tor call");
_autos.add(a);
}
void
TR_CallStack::addTemp(TR::SymbolReference * temp)
{
TR_ASSERT(_safeToAddSymRefs, "make sure a constructed callStack is committed then add _safeToAddSymRefs to your c-tor call");
_temps.add(temp);
}
void
TR_CallStack::addInjectedBasicBlockTemp(TR::SymbolReference * temp)
{
TR_ASSERT(_safeToAddSymRefs, "make sure a constructed callStack is committed then add _safeToAddSymRefs to your c-tor call");
_injectedBasicBlockTemps.add(temp);
}
void
TR_CallStack::makeTempsAvailable(List<TR::SymbolReference> & availableTemps)
{
makeTempsAvailable(availableTemps, _temps);
}
void
TR_CallStack::makeBasicBlockTempsAvailable(List<TR::SymbolReference> & availableTemps)
{
makeTempsAvailable(availableTemps, _injectedBasicBlockTemps);
}
void
TR_CallStack::makeTempsAvailable(List<TR::SymbolReference> & availableTemps, List<TR::SymbolReference> & temps)
{
if (!getNext())
{
TR::SymbolReference * temp;
while ((temp = temps.popHead()))
{
_methodSymbol->addAutomatic(temp->getSymbol()->castToAutoSymbol());
availableTemps.add(temp);
}
}
}
TR_CallStack *
TR_CallStack::isCurrentlyOnTheStack(TR_ResolvedMethod * method, int32_t occurrences)
{
int32_t counter = 0;
for (TR_CallStack * cs = this; cs; cs = cs->getNext())
if (cs->_method->isSameMethod(method) && ++counter == occurrences)
return cs;
return 0;
}
bool
TR_CallStack::isAnywhereOnTheStack(TR_ResolvedMethod * method, int32_t occurrences)
{
int32_t counter = 0;
for (TR_CallStack * cs = this; cs; cs = cs->getNext())
{
if (cs->_method->isSameMethod(method) && ++counter == occurrences)
{
return true;
}
else if (cs->_currentCallNode)
{
for (int16_t callerIndex = cs->_currentCallNode->getByteCodeInfo().getCallerIndex(); callerIndex != -1; )
{
TR_InlinedCallSite &ics = _comp->getInlinedCallSite(callerIndex);
TR_ResolvedMethod *caller = _comp->getInlinedResolvedMethod(callerIndex);
if (caller->isSameMethod(method))
{
if (++counter == occurrences)
return true;
}
callerIndex = ics._byteCodeInfo.getCallerIndex();
}
}
}
return 0;
}