       1 /*
       2  * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
       3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
       4  *
       5  * This code is free software; you can redistribute it and/or modify it
       6  * under the terms of the GNU General Public License version 2 only, as
       7  * published by the Free Software Foundation.
       8  *
       9  * This code is distributed in the hope that it will be useful, but WITHOUT
      10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
      11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
      12  * version 2 for more details (a copy is included in the LICENSE file that
      13  * accompanied this code).
      14  *
      15  * You should have received a copy of the GNU General Public License version
      16  * 2 along with this work; if not, write to the Free Software Foundation,
      17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
      18  *
      19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
      20  * or visit www.oracle.com if you need additional information or have any
      21  * questions.
      22  *
      23  */
      24
      25 #ifndef SHARE_VM_OPTO_C2_GLOBALS_HPP
      26 #define SHARE_VM_OPTO_C2_GLOBALS_HPP
      27
      28 #include "runtime/globals.hpp"
      29 #ifdef TARGET_ARCH_x86
      30 # include "c2_globals_x86.hpp"
      31 #endif
      32 #ifdef TARGET_ARCH_sparc
      33 # include "c2_globals_sparc.hpp"
      34 #endif
      35 #ifdef TARGET_ARCH_arm
      36 # include "c2_globals_arm.hpp"
      37 #endif
      38 #ifdef TARGET_ARCH_ppc
      39 # include "c2_globals_ppc.hpp"
      40 #endif
      41 #ifdef TARGET_OS_FAMILY_linux
      42 # include "c2_globals_linux.hpp"
      43 #endif
      44 #ifdef TARGET_OS_FAMILY_solaris
      45 # include "c2_globals_solaris.hpp"
      46 #endif
      47 #ifdef TARGET_OS_FAMILY_windows
      48 # include "c2_globals_windows.hpp"
      49 #endif
      50 #ifdef TARGET_OS_FAMILY_aix
      51 # include "c2_globals_aix.hpp"
      52 #endif
      53 #ifdef TARGET_OS_FAMILY_bsd
      54 # include "c2_globals_bsd.hpp"
      55 #endif
      56
      57 //
      58 // Defines all globals flags used by the server compiler.
      59 //
      60
      61 #define C2_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct) \
      62                                                                             \
      63   develop(bool, StressLCM, false,                                           \
      64           "Randomize instruction scheduling in LCM")                        \
      65                                                                             \
      66   develop(bool, StressGCM, false,                                           \
      67           "Randomize instruction scheduling in GCM")                        \
      68                                                                             \
      69   notproduct(intx, CompileZapFirst, 0,                                      \
      70           "If +ZapDeadCompiledLocals, "                                     \
      71           "skip this many before compiling in zap calls")                   \
      72                                                                             \
      73   notproduct(intx, CompileZapLast, -1,                                      \
      74           "If +ZapDeadCompiledLocals, "                                     \
      75           "compile this many after skipping (incl. skip count, -1 = all)")  \
      76                                                                             \
      77   notproduct(intx, ZapDeadCompiledLocalsFirst, 0,                           \
      78           "If +ZapDeadCompiledLocals, "                                     \
      79           "skip this many before really doing it")                          \
      80                                                                             \
      81   notproduct(intx, ZapDeadCompiledLocalsLast, -1,                           \
      82           "If +ZapDeadCompiledLocals, "                                     \
      83           "do this many after skipping (incl. skip count, -1 = all)")       \
      84                                                                             \
      85   develop(intx, OptoPrologueNops, 0,                                        \
      86           "Insert this many extra nop instructions "                        \
      87           "in the prologue of every nmethod")                               \
      88                                                                             \
      89   product_pd(intx, InteriorEntryAlignment,                                  \
      90           "Code alignment for interior entry points "                       \
      91           "in generated code (in bytes)")                                   \
      92                                                                             \
      93   product(intx, MaxLoopPad, (OptoLoopAlignment-1),                          \
      94           "Align a loop if padding size in bytes is less or equal to this value") \
      95                                                                             \
      96   product(intx, MaxVectorSize, 32,                                          \
      97           "Max vector size in bytes, "                                      \
      98           "actual size could be less depending on elements type")           \
      99                                                                             \
     100   product(bool, AlignVector, true,                                          \
     101           "Perform vector store/load alignment in loop")                    \
     102                                                                             \
     103   product(intx, NumberOfLoopInstrToAlign, 4,                                \
     104           "Number of first instructions in a loop to align")                \
     105                                                                             \
     106   notproduct(intx, IndexSetWatch, 0,                                        \
     107           "Trace all operations on this IndexSet (-1 means all, 0 none)")   \
     108                                                                             \
     109   develop(intx, OptoNodeListSize, 4,                                        \
     110           "Starting allocation size of Node_List data structures")          \
     111                                                                             \
     112   develop(intx, OptoBlockListSize, 8,                                       \
     113           "Starting allocation size of Block_List data structures")         \
     114                                                                             \
     115   develop(intx, OptoPeepholeAt, -1,                                         \
     116           "Apply peephole optimizations to this peephole rule")             \
     117                                                                             \
     118   notproduct(bool, PrintIdeal, false,                                       \
     119           "Print ideal graph before code generation")                       \
     120                                                                             \
     121   notproduct(bool, PrintOpto, false,                                        \
     122           "Print compiler2 attempts")                                       \
     123                                                                             \
     124   notproduct(bool, PrintOptoInlining, false,                                \
     125           "Print compiler2 inlining decisions")                             \
     126                                                                             \
     127   notproduct(bool, VerifyOpto, false,                                       \
     128           "Apply more time consuming verification during compilation")      \
     129                                                                             \
     130   notproduct(bool, VerifyIdealNodeCount, false,                             \
     131           "Verify that tracked dead ideal node count is accurate")          \
     132                                                                             \
     133   notproduct(bool, PrintIdealNodeCount, false,                              \
     134           "Print liveness counts of ideal nodes")                           \
     135                                                                             \
     136   notproduct(bool, VerifyOptoOopOffsets, false,                             \
     137           "Check types of base addresses in field references")              \
     138                                                                             \
     139   develop(bool, IdealizedNumerics, false,                                   \
     140           "Check performance difference allowing FP "                       \
     141           "associativity and commutativity...")                             \
     142                                                                             \
     143   develop(bool, OptoBreakpoint, false,                                      \
     144           "insert breakpoint at method entry")                              \
     145                                                                             \
     146   notproduct(bool, OptoBreakpointOSR, false,                                \
     147           "insert breakpoint at osr method entry")                          \
     148                                                                             \
     149   notproduct(intx, BreakAtNode, 0,                                          \
     150           "Break at construction of this Node (either _idx or _debug_idx)") \
     151                                                                             \
     152   notproduct(bool, OptoBreakpointC2R, false,                                \
     153           "insert breakpoint at runtime stub entry")                        \
     154                                                                             \
     155   notproduct(bool, OptoNoExecute, false,                                    \
     156           "Attempt to parse and compile but do not execute generated code") \
     157                                                                             \
     158   notproduct(bool, PrintOptoStatistics, false,                              \
     159           "Print New compiler statistics")                                  \
     160                                                                             \
     161   notproduct(bool, PrintOptoAssembly, false,                                \
     162           "Print New compiler assembly output")                             \
     163                                                                             \
     164   develop_pd(bool, OptoPeephole,                                            \
     165           "Apply peephole optimizations after register allocation")         \
     166                                                                             \
     167   develop(bool, OptoRemoveUseless, true,                                    \
     168           "Remove useless nodes after parsing")                             \
     169                                                                             \
     170   notproduct(bool, PrintFrameConverterAssembly, false,                      \
     171           "Print New compiler assembly output for frame converters")        \
     172                                                                             \
     173   notproduct(bool, PrintParseStatistics, false,                             \
     174           "Print nodes, transforms and new values made per bytecode parsed")\
     175                                                                             \
     176   notproduct(bool, PrintOptoPeephole, false,                                \
     177           "Print New compiler peephole replacements")                       \
     178                                                                             \
     179   develop(bool, PrintCFGBlockFreq, false,                                   \
     180           "Print CFG block freqencies")                                     \
     181                                                                             \
     182   develop(bool, TraceOptoParse, false,                                      \
     183           "Trace bytecode parse and control-flow merge")                    \
     184                                                                             \
     185   product_pd(intx,  LoopUnrollLimit,                                        \
     186           "Unroll loop bodies with node count less than this")              \
     187                                                                             \
     188   product(intx,  LoopMaxUnroll, 16,                                         \
     189           "Maximum number of unrolls for main loop")                        \
     190                                                                             \
     191   product(intx,  LoopUnrollMin, 4,                                          \
     192           "Minimum number of unroll loop bodies before checking progress"   \
     193           "of rounds of unroll,optimize,..")                                \
     194                                                                             \
     195   develop(intx, UnrollLimitForProfileCheck, 1,                              \
     196           "Don't use profile_trip_cnt() to restrict unrolling until "       \
     197           "unrolling would push the number of unrolled iterations above "   \
     198           "UnrollLimitForProfileCheck. A higher value allows more "         \
     199           "unrolling. Zero acts as a very large value." )                   \
     200                                                                             \
     201   product(intx, MultiArrayExpandLimit, 6,                                   \
     202           "Maximum number of individual allocations in an inline-expanded " \
     203           "multianewarray instruction")                                     \
     204                                                                             \
     205   notproduct(bool, TraceProfileTripCount, false,                            \
     206           "Trace profile loop trip count information")                      \
     207                                                                             \
     208   product(bool, UseLoopPredicate, true,                                     \
     209           "Generate a predicate to select fast/slow loop versions")         \
     210                                                                             \
     211   develop(bool, TraceLoopPredicate, false,                                  \
     212           "Trace generation of loop predicates")                            \
     213                                                                             \
     214   develop(bool, TraceLoopOpts, false,                                       \
     215           "Trace executed loop optimizations")                              \
     216                                                                             \
     217   diagnostic(bool, LoopLimitCheck, true,                                    \
     218           "Generate a loop limits check for overflow")                      \
     219                                                                             \
     220   develop(bool, TraceLoopLimitCheck, false,                                 \
     221           "Trace generation of loop limits checks")                         \
     222                                                                             \
     223   diagnostic(bool, RangeLimitCheck, true,                                   \
     224           "Additional overflow checks during range check elimination")      \
     225                                                                             \
     226   develop(bool, TraceRangeLimitCheck, false,                                \
     227           "Trace additional overflow checks in RCE")                        \
     228                                                                             \
     229   diagnostic(bool, UnrollLimitCheck, true,                                  \
     230           "Additional overflow checks during loop unroll")                  \
     231                                                                             \
     232   /* OptimizeFill not yet supported on PowerPC. */                          \
     233   product(bool, OptimizeFill, true PPC64_ONLY(&& false),                    \
     234           "convert fill/copy loops into intrinsic")                         \
     235                                                                             \
     236   develop(bool, TraceOptimizeFill, false,                                   \
     237           "print detailed information about fill conversion")               \
     238                                                                             \
     239   develop(bool, OptoCoalesce, true,                                         \
     240           "Use Conservative Copy Coalescing in the Register Allocator")     \
     241                                                                             \
     242   develop(bool, UseUniqueSubclasses, true,                                  \
     243           "Narrow an abstract reference to the unique concrete subclass")   \
     244                                                                             \
     245   develop(bool, UseExactTypes, true,                                        \
     246           "Use exact types to eliminate array store checks and v-calls")    \
     247                                                                             \
     248   product(intx, TrackedInitializationLimit, 50,                             \
     249           "When initializing fields, track up to this many words")          \
     250                                                                             \
     251   product(bool, ReduceFieldZeroing, true,                                   \
     252           "When initializing fields, try to avoid needless zeroing")        \
     253                                                                             \
     254   product(bool, ReduceInitialCardMarks, true,                               \
     255           "When initializing fields, try to avoid needless card marks")     \
     256                                                                             \
     257   product(bool, ReduceBulkZeroing, true,                                    \
     258           "When bulk-initializing, try to avoid needless zeroing")          \
     259                                                                             \
     260   product(bool, UseFPUForSpilling, false,                                   \
     261           "Spill integer registers to FPU instead of stack when possible")  \
     262                                                                             \
     263   develop_pd(intx, RegisterCostAreaRatio,                                   \
     264           "Spill selection in reg allocator: scale area by (X/64K) before " \
     265           "adding cost")                                                    \
     266                                                                             \
     267   develop_pd(bool, UseCISCSpill,                                            \
     268           "Use ADLC supplied cisc instructions during allocation")          \
     269                                                                             \
     270   notproduct(bool, VerifyGraphEdges , false,                                \
     271           "Verify Bi-directional Edges")                                    \
     272                                                                             \
     273   notproduct(bool, VerifyDUIterators, true,                                 \
     274           "Verify the safety of all iterations of Bi-directional Edges")    \
     275                                                                             \
     276   notproduct(bool, VerifyHashTableKeys, true,                               \
     277           "Verify the immutability of keys in the VN hash tables")          \
     278                                                                             \
     279   notproduct(bool, VerifyRegisterAllocator , false,                         \
     280           "Verify Register Allocator")                                      \
     281                                                                             \
     282   develop_pd(intx, FLOATPRESSURE,                                           \
     283           "Number of float LRG's that constitute high register pressure")   \
     284                                                                             \
     285   develop_pd(intx, INTPRESSURE,                                             \
     286           "Number of integer LRG's that constitute high register pressure") \
     287                                                                             \
     288   notproduct(bool, TraceOptoPipelining, false,                              \
     289           "Trace pipelining information")                                   \
     290                                                                             \
     291   notproduct(bool, TraceOptoOutput, false,                                  \
     292           "Trace pipelining information")                                   \
     293                                                                             \
     294   product_pd(bool, OptoScheduling,                                          \
     295           "Instruction Scheduling after register allocation")               \
     296                                                                             \
     297   product(bool, PartialPeelLoop, true,                                      \
     298           "Partial peel (rotate) loops")                                    \
     299                                                                             \
     300   product(intx, PartialPeelNewPhiDelta, 0,                                  \
     301           "Additional phis that can be created by partial peeling")         \
     302                                                                             \
     303   notproduct(bool, TracePartialPeeling, false,                              \
     304           "Trace partial peeling (loop rotation) information")              \
     305                                                                             \
     306   product(bool, PartialPeelAtUnsignedTests, true,                           \
     307           "Partial peel at unsigned tests if no signed test exists")        \
     308                                                                             \
     309   product(bool, ReassociateInvariants, true,                                \
     310           "Enable reassociation of expressions with loop invariants.")      \
     311                                                                             \
     312   product(bool, LoopUnswitching, true,                                      \
     313           "Enable loop unswitching (a form of invariant test hoisting)")    \
     314                                                                             \
     315   notproduct(bool, TraceLoopUnswitching, false,                             \
     316           "Trace loop unswitching")                                         \
     317                                                                             \
     318   product(bool, UseSuperWord, true,                                         \
     319           "Transform scalar operations into superword operations")          \
     320                                                                             \
     321   develop(bool, SuperWordRTDepCheck, false,                                 \
     322           "Enable runtime dependency checks.")                              \
     323                                                                             \
     324   notproduct(bool, TraceSuperWord, false,                                   \
     325           "Trace superword transforms")                                     \
     326                                                                             \
     327   notproduct(bool, TraceNewVectors, false,                                  \
     328           "Trace creation of Vector nodes")                                 \
     329                                                                             \
     330   product_pd(bool, OptoBundling,                                            \
     331           "Generate nops to fill i-cache lines")                            \
     332                                                                             \
     333   product_pd(intx, ConditionalMoveLimit,                                    \
     334           "Limit of ops to make speculative when using CMOVE")              \
     335                                                                             \
     336   /* Set BranchOnRegister == false. See 4965987. */                         \
     337   product(bool, BranchOnRegister, false,                                    \
     338           "Use Sparc V9 branch-on-register opcodes")                        \
     339                                                                             \
     340   develop(bool, SparcV9RegsHiBitsZero, true,                                \
     341           "Assume Sparc V9 I&L registers on V8+ systems are zero-extended") \
     342                                                                             \
     343   product(bool, UseRDPCForConstantTableBase, false,                         \
     344           "Use Sparc RDPC instruction for the constant table base.")        \
     345                                                                             \
     346   develop(bool, PrintIdealGraph, false,                                     \
     347           "Print ideal graph to XML file / network interface. "             \
     348           "By default attempts to connect to the visualizer on a socket.")  \
     349                                                                             \
     350   develop(intx, PrintIdealGraphLevel, 0,                                    \
     351           "Level of detail of the ideal graph printout. "                   \
     352           "System-wide value, 0=nothing is printed, 3=all details printed. "\
     353           "Level of detail of printouts can be set on a per-method level "  \
     354           "as well by using CompileCommand=option.")                        \
     355                                                                             \
     356   develop(intx, PrintIdealGraphPort, 4444,                                  \
     357           "Ideal graph printer to network port")                            \
     358                                                                             \
     359   notproduct(ccstr, PrintIdealGraphAddress, "127.0.0.1",                    \
     360           "IP address to connect to visualizer")                            \
     361                                                                             \
     362   notproduct(ccstr, PrintIdealGraphFile, NULL,                              \
     363           "File to dump ideal graph to.  If set overrides the "             \
     364           "use of the network")                                             \
     365                                                                             \
     366   product(bool, UseBimorphicInlining, true,                                 \
     367           "Profiling based inlining for two receivers")                     \
     368                                                                             \
     369   product(bool, UseOnlyInlinedBimorphic, true,                              \
     370           "Don't use BimorphicInlining if can't inline a second method")    \
     371                                                                             \
     372   product(bool, InsertMemBarAfterArraycopy, true,                           \
     373           "Insert memory barrier after arraycopy call")                     \
     374                                                                             \
     375   develop(bool, SubsumeLoads, true,                                         \
     376           "Attempt to compile while subsuming loads into machine instructions.") \
     377                                                                             \
     378   develop(bool, StressRecompilation, false,                                 \
     379           "Recompile each compiled method without subsuming loads or escape analysis.") \
     380                                                                             \
     381   develop(intx, ImplicitNullCheckThreshold, 3,                              \
     382           "Don't do implicit null checks if NPE's in a method exceeds limit") \
     383                                                                             \
     384   product(intx, LoopOptsCount, 43,                                          \
     385           "Set level of loop optimization for tier 1 compiles")             \
     386                                                                             \
     387   /* controls for heat-based inlining */                                    \
     388                                                                             \
     389   develop(intx, NodeCountInliningCutoff, 18000,                             \
     390           "If parser node generation exceeds limit stop inlining")          \
     391                                                                             \
     392   develop(intx, NodeCountInliningStep, 1000,                                \
     393           "Target size of warm calls inlined between optimization passes")  \
     394                                                                             \
     395   develop(bool, InlineWarmCalls, false,                                     \
     396           "Use a heat-based priority queue to govern inlining")             \
     397                                                                             \
     398   develop(intx, HotCallCountThreshold, 999999,                              \
     399           "large numbers of calls (per method invocation) force hotness")   \
     400                                                                             \
     401   develop(intx, HotCallProfitThreshold, 999999,                             \
     402           "highly profitable inlining opportunities force hotness")         \
     403                                                                             \
     404   develop(intx, HotCallTrivialWork, -1,                                     \
     405           "trivial execution time (no larger than this) forces hotness")    \
     406                                                                             \
     407   develop(intx, HotCallTrivialSize, -1,                                     \
     408           "trivial methods (no larger than this) force calls to be hot")    \
     409                                                                             \
     410   develop(intx, WarmCallMinCount, -1,                                       \
     411           "number of calls (per method invocation) to enable inlining")     \
     412                                                                             \
     413   develop(intx, WarmCallMinProfit, -1,                                      \
     414           "number of calls (per method invocation) to enable inlining")     \
     415                                                                             \
     416   develop(intx, WarmCallMaxWork, 999999,                                    \
     417           "execution time of the largest inlinable method")                 \
     418                                                                             \
     419   develop(intx, WarmCallMaxSize, 999999,                                    \
     420           "size of the largest inlinable method")                           \
     421                                                                             \
     422   product(intx, MaxNodeLimit, 80000,                                        \
     423           "Maximum number of nodes")                                        \
     424                                                                             \
     425   product(intx, NodeLimitFudgeFactor, 2000,                                 \
     426           "Fudge Factor for certain optimizations")                         \
     427                                                                             \
     428   product(bool, UseJumpTables, true,                                        \
     429           "Use JumpTables instead of a binary search tree for switches")    \
     430                                                                             \
     431   product(bool, UseDivMod, true,                                            \
     432           "Use combined DivMod instruction if available")                   \
     433                                                                             \
     434   product_pd(intx, MinJumpTableSize,                                        \
     435           "Minimum number of targets in a generated jump table")            \
     436                                                                             \
     437   product(intx, MaxJumpTableSize, 65000,                                    \
     438           "Maximum number of targets in a generated jump table")            \
     439                                                                             \
     440   product(intx, MaxJumpTableSparseness, 5,                                  \
     441           "Maximum sparseness for jumptables")                              \
     442                                                                             \
     443   product(bool, EliminateLocks, true,                                       \
     444           "Coarsen locks when possible")                                    \
     445                                                                             \
     446   product(bool, EliminateNestedLocks, true,                                 \
     447           "Eliminate nested locks of the same object when possible")        \
     448                                                                             \
     449   notproduct(bool, PrintLockStatistics, false,                              \
     450           "Print precise statistics on the dynamic lock usage")             \
     451                                                                             \
     452   diagnostic(bool, PrintPreciseBiasedLockingStatistics, false,              \
     453           "Print per-lock-site statistics of biased locking in JVM")        \
     454                                                                             \
     455   diagnostic(bool, PrintPreciseRTMLockingStatistics, false,                 \
     456           "Print per-lock-site statistics of rtm locking in JVM")           \
     457                                                                             \
     458   notproduct(bool, PrintEliminateLocks, false,                              \
     459           "Print out when locks are eliminated")                            \
     460                                                                             \
     461   product(bool, EliminateAutoBox, true,                                     \
     462           "Control optimizations for autobox elimination")                  \
     463                                                                             \
     464   diagnostic(bool, UseImplicitStableValues, true,                           \
     465           "Mark well-known stable fields as such (e.g. String.value)")      \
     466                                                                             \
     467   product(intx, AutoBoxCacheMax, 128,                                       \
     468           "Sets max value cached by the java.lang.Integer autobox cache")   \
     469                                                                             \
     470   experimental(bool, AggressiveUnboxing, false,                             \
     471           "Control optimizations for aggressive boxing elimination")        \
     472                                                                             \
     473   develop(bool, TracePostallocExpand, false, "Trace expanding nodes after"  \
     474           " register allocation.")                                          \
     475                                                                             \
     476   product(bool, DoEscapeAnalysis, true,                                     \
     477           "Perform escape analysis")                                        \
     478                                                                             \
     479   product(double, EscapeAnalysisTimeout, 20. DEBUG_ONLY(+40.),              \
     480           "Abort EA when it reaches time limit (in sec)")                   \
     481                                                                             \
     482   develop(bool, ExitEscapeAnalysisOnTimeout, true,                          \
     483           "Exit or throw assert in EA when it reaches time limit")          \
     484                                                                             \
     485   notproduct(bool, PrintEscapeAnalysis, false,                              \
     486           "Print the results of escape analysis")                           \
     487                                                                             \
     488   product(bool, EliminateAllocations, true,                                 \
     489           "Use escape analysis to eliminate allocations")                   \
     490                                                                             \
     491   notproduct(bool, PrintEliminateAllocations, false,                        \
     492           "Print out when allocations are eliminated")                      \
     493                                                                             \
     494   product(intx, EliminateAllocationArraySizeLimit, 64,                      \
     495           "Array size (number of elements) limit for scalar replacement")   \
     496                                                                             \
     497   product(bool, OptimizePtrCompare, true,                                   \
     498           "Use escape analysis to optimize pointers compare")               \
     499                                                                             \
     500   notproduct(bool, PrintOptimizePtrCompare, false,                          \
     501           "Print information about optimized pointers compare")             \
     502                                                                             \
     503   notproduct(bool, VerifyConnectionGraph , true,                            \
     504           "Verify Connection Graph construction in Escape Analysis")        \
     505                                                                             \
     506   product(bool, UseOptoBiasInlining, true,                                  \
     507           "Generate biased locking code in C2 ideal graph")                 \
     508                                                                             \
     509   product(bool, OptimizeStringConcat, true,                                 \
     510           "Optimize the construction of Strings by StringBuilder")          \
     511                                                                             \
     512   notproduct(bool, PrintOptimizeStringConcat, false,                        \
     513           "Print information about transformations performed on Strings")   \
     514                                                                             \
     515   product(intx, ValueSearchLimit, 1000,                                     \
     516           "Recursion limit in PhaseMacroExpand::value_from_mem_phi")        \
     517                                                                             \
     518   product(intx, MaxLabelRootDepth, 1100,                                    \
     519           "Maximum times call Label_Root to prevent stack overflow")        \
     520                                                                             \
     521   diagnostic(intx, DominatorSearchLimit, 1000,                              \
     522           "Iterations limit in Node::dominates")                            \
     523                                                                             \
     524   product(bool, BlockLayoutByFrequency, true,                               \
     525           "Use edge frequencies to drive block ordering")                   \
     526                                                                             \
     527   product(intx, BlockLayoutMinDiamondPercentage, 20,                        \
     528           "Miniumum %% of a successor (predecessor) for which block layout "\
     529           "a will allow a fork (join) in a single chain")                   \
     530                                                                             \
     531   product(bool, BlockLayoutRotateLoops, true,                               \
     532           "Allow back branches to be fall throughs in the block layour")    \
     533                                                                             \
     534   develop(bool, InlineReflectionGetCallerClass, true,                       \
     535           "inline sun.reflect.Reflection.getCallerClass(), known to be part "\
     536           "of base library DLL")                                            \
     537                                                                             \
     538   develop(bool, InlineObjectCopy, true,                                     \
     539           "inline Object.clone and Arrays.copyOf[Range] intrinsics")        \
     540                                                                             \
     541   develop(bool, SpecialStringCompareTo, true,                               \
     542           "special version of string compareTo")                            \
     543                                                                             \
     544   develop(bool, SpecialStringIndexOf, true,                                 \
     545           "special version of string indexOf")                              \
     546                                                                             \
     547   develop(bool, SpecialStringEquals, true,                                  \
     548           "special version of string equals")                               \
     549                                                                             \
     550   develop(bool, SpecialArraysEquals, true,                                  \
     551           "special version of Arrays.equals(char[],char[])")                \
     552                                                                             \
     553   product(bool, SpecialEncodeISOArray, true,                                \
     554           "special version of ISO_8859_1$Encoder.encodeISOArray")           \
     555                                                                             \
     556   develop(bool, BailoutToInterpreterForThrows, false,                       \
     557           "Compiled methods which throws/catches exceptions will be "       \
     558           "deopt and intp.")                                                \
     559                                                                             \
     560   develop(bool, ConvertCmpD2CmpF, true,                                     \
     561           "Convert cmpD to cmpF when one input is constant in float range") \
     562                                                                             \
     563   develop(bool, ConvertFloat2IntClipping, true,                             \
     564           "Convert float2int clipping idiom to integer clipping")           \
     565                                                                             \
     566   develop(bool, Use24BitFPMode, true,                                       \
     567           "Set 24-bit FPU mode on a per-compile basis ")                    \
     568                                                                             \
     569   develop(bool, Use24BitFP, true,                                           \
     570           "use FP instructions that produce 24-bit precise results")        \
     571                                                                             \
     572   develop(bool, MonomorphicArrayCheck, true,                                \
     573           "Uncommon-trap array store checks that require full type check")  \
     574                                                                             \
     575   notproduct(bool, TracePhaseCCP, false,                                    \
     576           "Print progress during Conditional Constant Propagation")         \
     577                                                                             \
     578   develop(bool, PrintDominators, false,                                     \
     579           "Print out dominator trees for GVN")                              \
     580                                                                             \
     581   notproduct(bool, TraceSpilling, false,                                    \
     582           "Trace spilling")                                                 \
     583                                                                             \
     584   diagnostic(bool, TraceTypeProfile, false,                                 \
     585           "Trace type profile")                                             \
     586                                                                             \
     587   develop(bool, PoisonOSREntry, true,                                       \
     588            "Detect abnormal calls to OSR code")                             \
     589                                                                             \
     590   product(bool, UseCondCardMark, false,                                     \
     591           "Check for already marked card before updating card table")       \
     592                                                                             \
     593   develop(bool, SoftMatchFailure, trueInProduct,                            \
     594           "If the DFA fails to match a node, print a message and bail out") \
     595                                                                             \
     596   develop(bool, InlineAccessors, true,                                      \
     597           "inline accessor methods (get/set)")                              \
     598                                                                             \
     599   product(intx, TypeProfileMajorReceiverPercent, 90,                        \
     600           "% of major receiver type to all profiled receivers")             \
     601                                                                             \
     602   diagnostic(bool, PrintIntrinsics, false,                                  \
     603           "prints attempted and successful inlining of intrinsics")         \
     604                                                                             \
     605   diagnostic(ccstrlist, DisableIntrinsic, "",                               \
     606           "do not expand intrinsics whose (internal) names appear here")    \
     607                                                                             \
     608   develop(bool, StressReflectiveCode, false,                                \
     609           "Use inexact types at allocations, etc., to test reflection")     \
     610                                                                             \
     611   diagnostic(bool, DebugInlinedCalls, true,                                 \
     612          "If false, restricts profiled locations to the root method only")  \
     613                                                                             \
     614   notproduct(bool, VerifyLoopOptimizations, false,                          \
     615           "verify major loop optimizations")                                \
     616                                                                             \
     617   diagnostic(bool, ProfileDynamicTypes, true,                               \
     618           "do extra type profiling and use it more aggressively")           \
     619                                                                             \
     620   develop(bool, TraceIterativeGVN, false,                                   \
     621           "Print progress during Iterative Global Value Numbering")         \
     622                                                                             \
     623   develop(bool, VerifyIterativeGVN, false,                                  \
     624           "Verify Def-Use modifications during sparse Iterative Global "    \
     625           "Value Numbering")                                                \
     626                                                                             \
     627   notproduct(bool, TraceCISCSpill, false,                                   \
     628           "Trace allocators use of cisc spillable instructions")            \
     629                                                                             \
     630   product(bool, SplitIfBlocks, true,                                        \
     631           "Clone compares and control flow through merge points to fold "   \
     632           "some branches")                                                  \
     633                                                                             \
     634   develop(intx, FreqCountInvocations,  1,                                   \
     635           "Scaling factor for branch frequencies (deprecated)")             \
     636                                                                             \
     637   product(intx, AliasLevel,     3,                                          \
     638           "0 for no aliasing, 1 for oop/field/static/array split, "         \
     639           "2 for class split, 3 for unique instances")                      \
     640                                                                             \
     641   develop(bool, VerifyAliases, false,                                       \
     642           "perform extra checks on the results of alias analysis")          \
     643                                                                             \
     644   product(bool, IncrementalInline, true,                                    \
     645           "do post parse inlining")                                         \
     646                                                                             \
     647   develop(bool, AlwaysIncrementalInline, false,                             \
     648           "do all inlining incrementally")                                  \
     649                                                                             \
     650   product(intx, LiveNodeCountInliningCutoff, 40000,                         \
     651           "max number of live nodes in a method")                           \
     652                                                                             \
     653   diagnostic(bool, OptimizeExpensiveOps, true,                              \
     654           "Find best control for expensive operations")                     \
     655                                                                             \
     656   product(bool, UseMathExactIntrinsics, true,                               \
     657           "Enables intrinsification of various java.lang.Math functions")   \
     658                                                                             \
     659   product(bool, UseMultiplyToLenIntrinsic, false,                           \
     660           "Enables intrinsification of BigInteger.multiplyToLen()")         \
     661                                                                             \

     662   product(bool, UseTypeSpeculation, true,                                   \
     663           "Speculatively propagate types from profiles")                    \
     664                                                                             \
     665   diagnostic(bool, UseInlineDepthForSpeculativeTypes, true,                 \
     666           "Carry inline depth of profile point with speculative type "      \
     667           "and give priority to profiling from lower inline depth")         \
     668                                                                             \
     669   product_pd(bool, TrapBasedRangeChecks,                                    \
     670           "Generate code for range checks that uses a cmp and trap "        \
     671           "instruction raising SIGTRAP. Used on PPC64.")                    \
     672                                                                             \
     673   product(intx, ArrayCopyLoadStoreMaxElem, 8,                               \
     674           "Maximum number of arraycopy elements inlined as a sequence of"   \
     675           "loads/stores")                                                   \
     676                                                                             \
     677   develop(bool, StressArrayCopyMacroNode, false,                            \
     678           "Perform ArrayCopy load/store replacement during IGVN only")
     679
     680 C2_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG)
     681
     682 #endif // SHARE_VM_OPTO_C2_GLOBALS_HPP
    --- EOF ---