JDK14/Java14源码在线阅读
/*
* Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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*/
#ifndef SHARE_OPTO_C2_GLOBALS_HPP
#define SHARE_OPTO_C2_GLOBALS_HPP
#include "runtime/globals_shared.hpp"
#include "utilities/macros.hpp"
#include CPU_HEADER(c2_globals)
#include OS_HEADER(c2_globals)
//
// Defines all globals flags used by the server compiler.
//
#define C2_FLAGS(develop, \
develop_pd, \
product, \
product_pd, \
diagnostic, \
diagnostic_pd, \
experimental, \
notproduct, \
range, \
constraint, \
writeable) \
\
diagnostic(bool, StressLCM, false, \
"Randomize instruction scheduling in LCM") \
\
diagnostic(bool, StressGCM, false, \
"Randomize instruction scheduling in GCM") \
\
develop(bool, StressMethodHandleLinkerInlining, false, \
"Stress inlining through method handle linkers") \
\
develop(intx, OptoPrologueNops, 0, \
"Insert this many extra nop instructions " \
"in the prologue of every nmethod") \
range(0, 128) \
\
product_pd(intx, InteriorEntryAlignment, \
"Code alignment for interior entry points " \
"in generated code (in bytes)") \
constraint(InteriorEntryAlignmentConstraintFunc, AfterErgo) \
\
product(intx, MaxLoopPad, (OptoLoopAlignment-1), \
"Align a loop if padding size in bytes is less or equal to this " \
"value") \
range(0, max_jint) \
\
product(intx, MaxVectorSize, 64, \
"Max vector size in bytes, " \
"actual size could be less depending on elements type") \
range(0, max_jint) \
\
product(bool, AlignVector, true, \
"Perform vector store/load alignment in loop") \
\
product(intx, NumberOfLoopInstrToAlign, 4, \
"Number of first instructions in a loop to align") \
range(0, max_jint) \
\
notproduct(intx, IndexSetWatch, 0, \
"Trace all operations on this IndexSet (-1 means all, 0 none)") \
range(-1, 0) \
\
develop(intx, OptoNodeListSize, 4, \
"Starting allocation size of Node_List data structures") \
range(0, max_jint) \
\
develop(intx, OptoBlockListSize, 8, \
"Starting allocation size of Block_List data structures") \
range(0, max_jint) \
\
develop(intx, OptoPeepholeAt, -1, \
"Apply peephole optimizations to this peephole rule") \
\
notproduct(bool, PrintIdeal, false, \
"Print ideal graph before code generation") \
\
notproduct(bool, PrintOpto, false, \
"Print compiler2 attempts") \
\
notproduct(bool, PrintOptoInlining, false, \
"Print compiler2 inlining decisions") \
\
notproduct(bool, VerifyIdealNodeCount, false, \
"Verify that tracked dead ideal node count is accurate") \
\
notproduct(bool, PrintIdealNodeCount, false, \
"Print liveness counts of ideal nodes") \
\
notproduct(bool, VerifyOptoOopOffsets, false, \
"Check types of base addresses in field references") \
\
develop(bool, IdealizedNumerics, false, \
"Check performance difference allowing FP " \
"associativity and commutativity...") \
\
diagnostic_pd(bool, IdealizeClearArrayNode, \
"Replace ClearArrayNode by subgraph of basic operations.") \
\
develop(bool, OptoBreakpoint, false, \
"insert breakpoint at method entry") \
\
notproduct(bool, OptoBreakpointOSR, false, \
"insert breakpoint at osr method entry") \
\
notproduct(intx, BreakAtNode, 0, \
"Break at construction of this Node (either _idx or _debug_idx)") \
\
notproduct(bool, OptoBreakpointC2R, false, \
"insert breakpoint at runtime stub entry") \
\
notproduct(bool, OptoNoExecute, false, \
"Attempt to parse and compile but do not execute generated code") \
\
notproduct(bool, PrintOptoStatistics, false, \
"Print New compiler statistics") \
\
diagnostic(bool, PrintOptoAssembly, false, \
"Print New compiler assembly output") \
\
develop_pd(bool, OptoPeephole, \
"Apply peephole optimizations after register allocation") \
\
develop(bool, OptoRemoveUseless, true, \
"Remove useless nodes after parsing") \
\
notproduct(bool, PrintFrameConverterAssembly, false, \
"Print New compiler assembly output for frame converters") \
\
notproduct(bool, PrintParseStatistics, false, \
"Print nodes, transforms and new values made per bytecode parsed")\
\
notproduct(bool, PrintOptoPeephole, false, \
"Print New compiler peephole replacements") \
\
develop(bool, PrintCFGBlockFreq, false, \
"Print CFG block freqencies") \
\
develop(bool, TraceOptoParse, false, \
"Trace bytecode parse and control-flow merge") \
\
product_pd(intx, LoopUnrollLimit, \
"Unroll loop bodies with node count less than this") \
range(0, max_jint / 4) \
\
product_pd(intx, LoopPercentProfileLimit, \
"Unroll loop bodies with % node count of profile limit") \
range(10, 100) \
\
product(intx, LoopMaxUnroll, 16, \
"Maximum number of unrolls for main loop") \
range(0, max_jint) \
\
product_pd(bool, SuperWordLoopUnrollAnalysis, \
"Map number of unrolls for main loop via " \
"Superword Level Parallelism analysis") \
\
experimental(bool, PostLoopMultiversioning, false, \
"Multi versioned post loops to eliminate range checks") \
\
notproduct(bool, TraceSuperWordLoopUnrollAnalysis, false, \
"Trace what Superword Level Parallelism analysis applies") \
\
product(intx, LoopUnrollMin, 4, \
"Minimum number of unroll loop bodies before checking progress" \
"of rounds of unroll,optimize,..") \
range(0, max_jint) \
\
product(bool, UseSubwordForMaxVector, true, \
"Use Subword Analysis to set maximum vector size") \
\
product(bool, UseVectorCmov, false, \
"Use Vectorized Cmov") \
\
develop(intx, UnrollLimitForProfileCheck, 1, \
"Don't use profile_trip_cnt() to restrict unrolling until " \
"unrolling would push the number of unrolled iterations above " \
"UnrollLimitForProfileCheck. A higher value allows more " \
"unrolling. Zero acts as a very large value." ) \
range(0, max_intx) \
\
product(intx, MultiArrayExpandLimit, 6, \
"Maximum number of individual allocations in an inline-expanded " \
"multianewarray instruction") \
range(0, max_jint) \
\
notproduct(bool, TraceProfileTripCount, false, \
"Trace profile loop trip count information") \
\
product(bool, UseCountedLoopSafepoints, false, \
"Force counted loops to keep a safepoint") \
\
product(bool, UseLoopPredicate, true, \
"Generate a predicate to select fast/slow loop versions") \
\
develop(bool, TraceLoopPredicate, false, \
"Trace generation of loop predicates") \
\
develop(bool, TraceLoopOpts, false, \
"Trace executed loop optimizations") \
\
develop(bool, TraceLoopLimitCheck, false, \
"Trace generation of loop limits checks") \
\
develop(bool, TraceRangeLimitCheck, false, \
"Trace additional overflow checks in RCE") \
\
/* OptimizeFill not yet supported on PowerPC. */ \
product(bool, OptimizeFill, true PPC64_ONLY(&& false), \
"convert fill/copy loops into intrinsic") \
\
develop(bool, TraceOptimizeFill, false, \
"print detailed information about fill conversion") \
\
develop(bool, OptoCoalesce, true, \
"Use Conservative Copy Coalescing in the Register Allocator") \
\
develop(bool, UseUniqueSubclasses, true, \
"Narrow an abstract reference to the unique concrete subclass") \
\
develop(bool, UseExactTypes, true, \
"Use exact types to eliminate array store checks and v-calls") \
\
product(intx, TrackedInitializationLimit, 50, \
"When initializing fields, track up to this many words") \
range(0, 65535) \
\
product(bool, ReduceFieldZeroing, true, \
"When initializing fields, try to avoid needless zeroing") \
\
product(bool, ReduceInitialCardMarks, true, \
"When initializing fields, try to avoid needless card marks") \
\
product(bool, ReduceBulkZeroing, true, \
"When bulk-initializing, try to avoid needless zeroing") \
\
product(bool, UseFPUForSpilling, false, \
"Spill integer registers to FPU instead of stack when possible") \
\
develop_pd(intx, RegisterCostAreaRatio, \
"Spill selection in reg allocator: scale area by (X/64K) before " \
"adding cost") \
\
develop_pd(bool, UseCISCSpill, \
"Use ADLC supplied cisc instructions during allocation") \
\
notproduct(bool, VerifyGraphEdges , false, \
"Verify Bi-directional Edges") \
\
notproduct(bool, VerifyDUIterators, true, \
"Verify the safety of all iterations of Bi-directional Edges") \
\
notproduct(bool, VerifyHashTableKeys, true, \
"Verify the immutability of keys in the VN hash tables") \
\
notproduct(bool, VerifyRegisterAllocator , false, \
"Verify Register Allocator") \
\
develop_pd(intx, FLOATPRESSURE, \
"Number of float LRG's that constitute high register pressure") \
range(0, max_jint) \
\
develop_pd(intx, INTPRESSURE, \
"Number of integer LRG's that constitute high register pressure") \
range(0, max_jint) \
\
notproduct(bool, TraceOptoPipelining, false, \
"Trace pipelining information") \
\
notproduct(bool, TraceOptoOutput, false, \
"Trace pipelining information") \
\
product_pd(bool, OptoScheduling, \
"Instruction Scheduling after register allocation") \
\
product_pd(bool, OptoRegScheduling, \
"Instruction Scheduling before register allocation for pressure") \
\
product(bool, PartialPeelLoop, true, \
"Partial peel (rotate) loops") \
\
product(intx, PartialPeelNewPhiDelta, 0, \
"Additional phis that can be created by partial peeling") \
range(0, max_jint) \
\
notproduct(bool, TracePartialPeeling, false, \
"Trace partial peeling (loop rotation) information") \
\
product(bool, PartialPeelAtUnsignedTests, true, \
"Partial peel at unsigned tests if no signed test exists") \
\
product(bool, ReassociateInvariants, true, \
"Enable reassociation of expressions with loop invariants.") \
\
product(bool, LoopUnswitching, true, \
"Enable loop unswitching (a form of invariant test hoisting)") \
\
notproduct(bool, TraceLoopUnswitching, false, \
"Trace loop unswitching") \
\
product(bool, AllowVectorizeOnDemand, true, \
"Globally supress vectorization set in VectorizeMethod") \
\
product(bool, UseSuperWord, true, \
"Transform scalar operations into superword operations") \
\
develop(bool, SuperWordRTDepCheck, false, \
"Enable runtime dependency checks.") \
\
product(bool, SuperWordReductions, true, \
"Enable reductions support in superword.") \
\
product(bool, UseCMoveUnconditionally, false, \
"Use CMove (scalar and vector) ignoring profitability test.") \
\
product(bool, DoReserveCopyInSuperWord, true, \
"Create reserve copy of graph in SuperWord.") \
\
notproduct(bool, TraceSuperWord, false, \
"Trace superword transforms") \
\
notproduct(bool, TraceNewVectors, false, \
"Trace creation of Vector nodes") \
\
product_pd(bool, OptoBundling, \
"Generate nops to fill i-cache lines") \
\
product_pd(intx, ConditionalMoveLimit, \
"Limit of ops to make speculative when using CMOVE") \
range(0, max_jint) \
\
/* Set BranchOnRegister == false. See 4965987. */ \
product(bool, BranchOnRegister, false, \
"Use Sparc V9 branch-on-register opcodes") \
\
develop(bool, SparcV9RegsHiBitsZero, true, \
"Assume Sparc V9 I&L registers on V8+ systems are zero-extended") \
\
product(bool, UseRDPCForConstantTableBase, false, \
"Use Sparc RDPC instruction for the constant table base.") \
\
notproduct(bool, PrintIdealGraph, false, \
"Print ideal graph to XML file / network interface. " \
"By default attempts to connect to the visualizer on a socket.") \
\
notproduct(intx, PrintIdealGraphLevel, 0, \
"Level of detail of the ideal graph printout. " \
"System-wide value, 0=nothing is printed, 4=all details printed. "\
"Level of detail of printouts can be set on a per-method level " \
"as well by using CompileCommand=option.") \
range(0, 4) \
\
notproduct(intx, PrintIdealGraphPort, 4444, \
"Ideal graph printer to network port") \
range(0, SHRT_MAX) \
\
notproduct(ccstr, PrintIdealGraphAddress, "127.0.0.1", \
"IP address to connect to visualizer") \
\
notproduct(ccstr, PrintIdealGraphFile, NULL, \
"File to dump ideal graph to. If set overrides the " \
"use of the network") \
\
product(bool, UseBimorphicInlining, true, \
"Profiling based inlining for two receivers") \
\
product(bool, UseOnlyInlinedBimorphic, true, \
"Don't use BimorphicInlining if can't inline a second method") \
\
product(bool, InsertMemBarAfterArraycopy, true, \
"Insert memory barrier after arraycopy call") \
\
develop(bool, SubsumeLoads, true, \
"Attempt to compile while subsuming loads into machine " \
"instructions.") \
\
develop(bool, StressRecompilation, false, \
"Recompile each compiled method without subsuming loads " \
"or escape analysis.") \
\
develop(intx, ImplicitNullCheckThreshold, 3, \
"Don't do implicit null checks if NPE's in a method exceeds " \
"limit") \
range(0, max_jint) \
\
product(intx, LoopOptsCount, 43, \
"Set level of loop optimization for tier 1 compiles") \
range(5, 43) \
\
/* controls for heat-based inlining */ \
\
develop(intx, NodeCountInliningCutoff, 18000, \
"If parser node generation exceeds limit stop inlining") \
range(0, max_jint) \
\
develop(intx, NodeCountInliningStep, 1000, \
"Target size of warm calls inlined between optimization passes") \
range(0, max_jint) \
\
develop(bool, InlineWarmCalls, false, \
"Use a heat-based priority queue to govern inlining") \
\
/* Max values must not exceed WarmCallInfo::MAX_VALUE(). */ \
develop(intx, HotCallCountThreshold, 999999, \
"large numbers of calls (per method invocation) force hotness") \
range(0, ((intx)MIN2((int64_t)max_intx,(int64_t)(+1.0e10)))) \
\
develop(intx, HotCallProfitThreshold, 999999, \
"highly profitable inlining opportunities force hotness") \
range(0, ((intx)MIN2((int64_t)max_intx,(int64_t)(+1.0e10)))) \
\
develop(intx, HotCallTrivialWork, -1, \
"trivial execution time (no larger than this) forces hotness") \
range(-1, ((intx)MIN2((int64_t)max_intx,(int64_t)(+1.0e10)))) \
\
develop(intx, HotCallTrivialSize, -1, \
"trivial methods (no larger than this) force calls to be hot") \
range(-1, ((intx)MIN2((int64_t)max_intx,(int64_t)(+1.0e10)))) \
\
develop(intx, WarmCallMinCount, -1, \
"number of calls (per method invocation) to enable inlining") \
range(-1, ((intx)MIN2((int64_t)max_intx,(int64_t)(+1.0e10)))) \
\
develop(intx, WarmCallMinProfit, -1, \
"number of calls (per method invocation) to enable inlining") \
range(-1, ((intx)MIN2((int64_t)max_intx,(int64_t)(+1.0e10)))) \
\
develop(intx, WarmCallMaxWork, 999999, \
"execution time of the largest inlinable method") \
range(0, ((intx)MIN2((int64_t)max_intx,(int64_t)(+1.0e10)))) \
\
develop(intx, WarmCallMaxSize, 999999, \
"size of the largest inlinable method") \
range(0, ((intx)MIN2((int64_t)max_intx,(int64_t)(+1.0e10)))) \
\
product(intx, MaxNodeLimit, 80000, \
"Maximum number of nodes") \
range(1000, max_jint / 3) \
\
product(intx, NodeLimitFudgeFactor, 2000, \
"Fudge Factor for certain optimizations") \
constraint(NodeLimitFudgeFactorConstraintFunc, AfterErgo) \
\
product(bool, UseJumpTables, true, \
"Use JumpTables instead of a binary search tree for switches") \
\
product(bool, UseDivMod, true, \
"Use combined DivMod instruction if available") \
\
product_pd(intx, MinJumpTableSize, \
"Minimum number of targets in a generated jump table") \
range(0, max_intx) \
\
product(intx, MaxJumpTableSize, 65000, \
"Maximum number of targets in a generated jump table") \
range(0, max_intx) \
\
product(intx, MaxJumpTableSparseness, 5, \
"Maximum sparseness for jumptables") \
range(0, max_intx / 4) \
\
product(bool, EliminateLocks, true, \
"Coarsen locks when possible") \
\
product(bool, EliminateNestedLocks, true, \
"Eliminate nested locks of the same object when possible") \
\
notproduct(bool, PrintLockStatistics, false, \
"Print precise statistics on the dynamic lock usage") \
\
diagnostic(bool, PrintPreciseBiasedLockingStatistics, false, \
"Print per-lock-site statistics of biased locking in JVM") \
\
diagnostic(bool, PrintPreciseRTMLockingStatistics, false, \
"Print per-lock-site statistics of rtm locking in JVM") \
\
notproduct(bool, PrintEliminateLocks, false, \
"Print out when locks are eliminated") \
\
product(bool, EliminateAutoBox, true, \
"Control optimizations for autobox elimination") \
\
product(intx, AutoBoxCacheMax, 128, \
"Sets max value cached by the java.lang.Integer autobox cache") \
range(0, max_jint) \
\
diagnostic(bool, AggressiveUnboxing, true, \
"Control optimizations for aggressive boxing elimination") \
\
develop(bool, TracePostallocExpand, false, "Trace expanding nodes after" \
" register allocation.") \
\
product(bool, DoEscapeAnalysis, true, \
"Perform escape analysis") \
\
product(double, EscapeAnalysisTimeout, 20. DEBUG_ONLY(+40.), \
"Abort EA when it reaches time limit (in sec)") \
range(0, DBL_MAX) \
\
develop(bool, ExitEscapeAnalysisOnTimeout, true, \
"Exit or throw assert in EA when it reaches time limit") \
\
notproduct(bool, PrintEscapeAnalysis, false, \
"Print the results of escape analysis") \
\
product(bool, EliminateAllocations, true, \
"Use escape analysis to eliminate allocations") \
\
notproduct(bool, PrintEliminateAllocations, false, \
"Print out when allocations are eliminated") \
\
product(intx, EliminateAllocationArraySizeLimit, 64, \
"Array size (number of elements) limit for scalar replacement") \
range(0, max_jint) \
\
product(bool, OptimizePtrCompare, true, \
"Use escape analysis to optimize pointers compare") \
\
notproduct(bool, PrintOptimizePtrCompare, false, \
"Print information about optimized pointers compare") \
\
notproduct(bool, VerifyConnectionGraph , true, \
"Verify Connection Graph construction in Escape Analysis") \
\
product(bool, UseOptoBiasInlining, true, \
"Generate biased locking code in C2 ideal graph") \
\
product(bool, OptimizeStringConcat, true, \
"Optimize the construction of Strings by StringBuilder") \
\
notproduct(bool, PrintOptimizeStringConcat, false, \
"Print information about transformations performed on Strings") \
\
product(intx, ValueSearchLimit, 1000, \
"Recursion limit in PhaseMacroExpand::value_from_mem_phi") \
range(0, max_jint) \
\
product(intx, MaxLabelRootDepth, 1100, \
"Maximum times call Label_Root to prevent stack overflow") \
range(100, max_jint) \
\
diagnostic(intx, DominatorSearchLimit, 1000, \
"Iterations limit in Node::dominates") \
range(0, max_jint) \
\
product(bool, BlockLayoutByFrequency, true, \
"Use edge frequencies to drive block ordering") \
\
product(intx, BlockLayoutMinDiamondPercentage, 20, \
"Miniumum %% of a successor (predecessor) for which block " \
"layout a will allow a fork (join) in a single chain") \
range(0, 100) \
\
product(bool, BlockLayoutRotateLoops, true, \
"Allow back branches to be fall throughs in the block layout") \
\
diagnostic(bool, InlineReflectionGetCallerClass, true, \
"inline sun.reflect.Reflection.getCallerClass(), known to be " \
"part of base library DLL") \
\
diagnostic(bool, InlineObjectCopy, true, \
"inline Object.clone and Arrays.copyOf[Range] intrinsics") \
\
diagnostic(bool, SpecialStringCompareTo, true, \
"special version of string compareTo") \
\
diagnostic(bool, SpecialStringIndexOf, true, \
"special version of string indexOf") \
\
diagnostic(bool, SpecialStringEquals, true, \
"special version of string equals") \
\
diagnostic(bool, SpecialArraysEquals, true, \
"special version of Arrays.equals(char[],char[])") \
\
diagnostic(bool, SpecialEncodeISOArray, true, \
"special version of ISO_8859_1$Encoder.encodeISOArray") \
\
develop(bool, BailoutToInterpreterForThrows, false, \
"Compiled methods which throws/catches exceptions will be " \
"deopt and intp.") \
\
develop(bool, ConvertCmpD2CmpF, true, \
"Convert cmpD to cmpF when one input is constant in float range") \
\
develop(bool, ConvertFloat2IntClipping, true, \
"Convert float2int clipping idiom to integer clipping") \
\
develop(bool, Use24BitFPMode, true, \
"Set 24-bit FPU mode on a per-compile basis ") \
\
develop(bool, Use24BitFP, true, \
"use FP instructions that produce 24-bit precise results") \
\
develop(bool, MonomorphicArrayCheck, true, \
"Uncommon-trap array store checks that require full type check") \
\
notproduct(bool, TracePhaseCCP, false, \
"Print progress during Conditional Constant Propagation") \
\
develop(bool, PrintDominators, false, \
"Print out dominator trees for GVN") \
\
diagnostic(bool, TraceSpilling, false, \
"Trace spilling") \
\
diagnostic(bool, TraceTypeProfile, false, \
"Trace type profile") \
\
develop(bool, PoisonOSREntry, true, \
"Detect abnormal calls to OSR code") \
\
develop(bool, SoftMatchFailure, trueInProduct, \
"If the DFA fails to match a node, print a message and bail out") \
\
develop(bool, InlineAccessors, true, \
"inline accessor methods (get/set)") \
\
product(intx, TypeProfileMajorReceiverPercent, 90, \
"% of major receiver type to all profiled receivers") \
range(0, 100) \
\
diagnostic(bool, PrintIntrinsics, false, \
"prints attempted and successful inlining of intrinsics") \
\
develop(bool, StressReflectiveCode, false, \
"Use inexact types at allocations, etc., to test reflection") \
\
diagnostic(bool, DebugInlinedCalls, true, \
"If false, restricts profiled locations to the root method only") \
\
notproduct(bool, VerifyLoopOptimizations, false, \
"verify major loop optimizations") \
\
diagnostic(bool, ProfileDynamicTypes, true, \
"do extra type profiling and use it more aggressively") \
\
develop(bool, TraceIterativeGVN, false, \
"Print progress during Iterative Global Value Numbering") \
\
develop(bool, VerifyIterativeGVN, false, \
"Verify Def-Use modifications during sparse Iterative Global " \
"Value Numbering") \
\
notproduct(bool, TraceCISCSpill, false, \
"Trace allocators use of cisc spillable instructions") \
\
product(bool, SplitIfBlocks, true, \
"Clone compares and control flow through merge points to fold " \
"some branches") \
\
develop(intx, FreqCountInvocations, 1, \
"Scaling factor for branch frequencies (deprecated)") \
range(1, max_intx) \
\
product(intx, AliasLevel, 3, \
"0 for no aliasing, 1 for oop/field/static/array split, " \
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