1 /*
   2  * Copyright (c) 2000, 2016, 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_ARCH_aarch64
  42 # include "c2_globals_aarch64.hpp"
  43 #endif
  44 #ifdef TARGET_OS_FAMILY_linux
  45 # include "c2_globals_linux.hpp"
  46 #endif
  47 #ifdef TARGET_OS_FAMILY_solaris
  48 # include "c2_globals_solaris.hpp"
  49 #endif
  50 #ifdef TARGET_OS_FAMILY_windows
  51 # include "c2_globals_windows.hpp"
  52 #endif
  53 #ifdef TARGET_OS_FAMILY_aix
  54 # include "c2_globals_aix.hpp"
  55 #endif
  56 #ifdef TARGET_OS_FAMILY_bsd
  57 # include "c2_globals_bsd.hpp"
  58 #endif
  59 
  60 //
  61 // Defines all globals flags used by the server compiler.
  62 //
  63 
  64 #define C2_FLAGS(develop, \
  65                  develop_pd, \
  66                  product, \
  67                  product_pd, \
  68                  diagnostic, \
  69                  diagnostic_pd, \
  70                  experimental, \
  71                  notproduct, \
  72                  range, \
  73                  constraint, \
  74                  writeable) \
  75                                                                             \
  76   diagnostic(bool, StressLCM, false,                                        \
  77           "Randomize instruction scheduling in LCM")                        \
  78                                                                             \
  79   diagnostic(bool, StressGCM, false,                                        \
  80           "Randomize instruction scheduling in GCM")                        \
  81                                                                             \
  82   develop(intx, OptoPrologueNops, 0,                                        \
  83           "Insert this many extra nop instructions "                        \
  84           "in the prologue of every nmethod")                               \
  85           range(0, 128)                                                     \
  86                                                                             \
  87   product_pd(intx, InteriorEntryAlignment,                                  \
  88           "Code alignment for interior entry points "                       \
  89           "in generated code (in bytes)")                                   \
  90           constraint(InteriorEntryAlignmentConstraintFunc, AfterErgo)       \
  91                                                                             \
  92   product(intx, MaxLoopPad, (OptoLoopAlignment-1),                          \
  93           "Align a loop if padding size in bytes is less or equal to this " \
  94           "value")                                                          \
  95           range(0, max_jint)                                                \
  96                                                                             \
  97   product(intx, MaxVectorSize, 64,                                          \
  98           "Max vector size in bytes, "                                      \
  99           "actual size could be less depending on elements type")           \
 100           range(0, max_jint)                                                \
 101                                                                             \
 102   product(bool, AlignVector, true,                                          \
 103           "Perform vector store/load alignment in loop")                    \
 104                                                                             \
 105   product(intx, NumberOfLoopInstrToAlign, 4,                                \
 106           "Number of first instructions in a loop to align")                \
 107           range(0, max_jint)                                                \
 108                                                                             \
 109   notproduct(intx, IndexSetWatch, 0,                                        \
 110           "Trace all operations on this IndexSet (-1 means all, 0 none)")   \
 111           range(-1, 0)                                                      \
 112                                                                             \
 113   develop(intx, OptoNodeListSize, 4,                                        \
 114           "Starting allocation size of Node_List data structures")          \
 115           range(0, max_jint)                                                \
 116                                                                             \
 117   develop(intx, OptoBlockListSize, 8,                                       \
 118           "Starting allocation size of Block_List data structures")         \
 119           range(0, max_jint)                                                \
 120                                                                             \
 121   develop(intx, OptoPeepholeAt, -1,                                         \
 122           "Apply peephole optimizations to this peephole rule")             \
 123                                                                             \
 124   notproduct(bool, PrintIdeal, false,                                       \
 125           "Print ideal graph before code generation")                       \
 126                                                                             \
 127   notproduct(bool, PrintOpto, false,                                        \
 128           "Print compiler2 attempts")                                       \
 129                                                                             \
 130   notproduct(bool, PrintOptoInlining, false,                                \
 131           "Print compiler2 inlining decisions")                             \
 132                                                                             \
 133   notproduct(bool, VerifyOpto, false,                                       \
 134           "Apply more time consuming verification during compilation")      \
 135                                                                             \
 136   notproduct(bool, VerifyIdealNodeCount, false,                             \
 137           "Verify that tracked dead ideal node count is accurate")          \
 138                                                                             \
 139   notproduct(bool, PrintIdealNodeCount, false,                              \
 140           "Print liveness counts of ideal nodes")                           \
 141                                                                             \
 142   notproduct(bool, VerifyOptoOopOffsets, false,                             \
 143           "Check types of base addresses in field references")              \
 144                                                                             \
 145   develop(bool, IdealizedNumerics, false,                                   \
 146           "Check performance difference allowing FP "                       \
 147           "associativity and commutativity...")                             \
 148                                                                             \
 149   develop(bool, OptoBreakpoint, false,                                      \
 150           "insert breakpoint at method entry")                              \
 151                                                                             \
 152   notproduct(bool, OptoBreakpointOSR, false,                                \
 153           "insert breakpoint at osr method entry")                          \
 154                                                                             \
 155   notproduct(intx, BreakAtNode, 0,                                          \
 156           "Break at construction of this Node (either _idx or _debug_idx)") \
 157                                                                             \
 158   notproduct(bool, OptoBreakpointC2R, false,                                \
 159           "insert breakpoint at runtime stub entry")                        \
 160                                                                             \
 161   notproduct(bool, OptoNoExecute, false,                                    \
 162           "Attempt to parse and compile but do not execute generated code") \
 163                                                                             \
 164   notproduct(bool, PrintOptoStatistics, false,                              \
 165           "Print New compiler statistics")                                  \
 166                                                                             \
 167   diagnostic(bool, PrintOptoAssembly, false,                                \
 168           "Print New compiler assembly output")                             \
 169                                                                             \
 170   develop_pd(bool, OptoPeephole,                                            \
 171           "Apply peephole optimizations after register allocation")         \
 172                                                                             \
 173   develop(bool, OptoRemoveUseless, true,                                    \
 174           "Remove useless nodes after parsing")                             \
 175                                                                             \
 176   notproduct(bool, PrintFrameConverterAssembly, false,                      \
 177           "Print New compiler assembly output for frame converters")        \
 178                                                                             \
 179   notproduct(bool, PrintParseStatistics, false,                             \
 180           "Print nodes, transforms and new values made per bytecode parsed")\
 181                                                                             \
 182   notproduct(bool, PrintOptoPeephole, false,                                \
 183           "Print New compiler peephole replacements")                       \
 184                                                                             \
 185   develop(bool, PrintCFGBlockFreq, false,                                   \
 186           "Print CFG block freqencies")                                     \
 187                                                                             \
 188   develop(bool, TraceOptoParse, false,                                      \
 189           "Trace bytecode parse and control-flow merge")                    \
 190                                                                             \
 191   product_pd(intx,  LoopUnrollLimit,                                        \
 192           "Unroll loop bodies with node count less than this")              \
 193           range(0, max_jint / 4)                                            \
 194                                                                             \
 195   product_pd(intx, LoopPercentProfileLimit,                                 \
 196              "Unroll loop bodies with % node count of profile limit")       \
 197              range(10, 100)                                                 \
 198                                                                             \
 199   product(intx,  LoopMaxUnroll, 16,                                         \
 200           "Maximum number of unrolls for main loop")                        \
 201           range(0, max_jint)                                                \
 202                                                                             \
 203   product_pd(bool,  SuperWordLoopUnrollAnalysis,                            \
 204            "Map number of unrolls for main loop via "                       \
 205            "Superword Level Parallelism analysis")                          \
 206                                                                             \
 207   diagnostic_pd(bool, PostLoopMultiversioning,                              \
 208            "Multi versioned post loops to eliminate range checks")          \
 209                                                                             \
 210   notproduct(bool, TraceSuperWordLoopUnrollAnalysis, false,                 \
 211           "Trace what Superword Level Parallelism analysis applies")        \
 212                                                                             \
 213   product(intx,  LoopUnrollMin, 4,                                          \
 214           "Minimum number of unroll loop bodies before checking progress"   \
 215           "of rounds of unroll,optimize,..")                                \
 216           range(0, max_jint)                                                \
 217                                                                             \
 218   develop(intx, UnrollLimitForProfileCheck, 1,                              \
 219           "Don't use profile_trip_cnt() to restrict unrolling until "       \
 220           "unrolling would push the number of unrolled iterations above "   \
 221           "UnrollLimitForProfileCheck. A higher value allows more "         \
 222           "unrolling. Zero acts as a very large value." )                   \
 223           range(0, max_intx)                                                \
 224                                                                             \
 225   product(intx, MultiArrayExpandLimit, 6,                                   \
 226           "Maximum number of individual allocations in an inline-expanded " \
 227           "multianewarray instruction")                                     \
 228           range(0, max_jint)                                                \
 229                                                                             \
 230   notproduct(bool, TraceProfileTripCount, false,                            \
 231           "Trace profile loop trip count information")                      \
 232                                                                             \
 233   product(bool, UseCountedLoopSafepoints, false,                            \
 234           "Force counted loops to keep a safepoint")                        \
 235                                                                             \
 236   product(bool, UseLoopPredicate, true,                                     \
 237           "Generate a predicate to select fast/slow loop versions")         \
 238                                                                             \
 239   develop(bool, TraceLoopPredicate, false,                                  \
 240           "Trace generation of loop predicates")                            \
 241                                                                             \
 242   develop(bool, TraceLoopOpts, false,                                       \
 243           "Trace executed loop optimizations")                              \
 244                                                                             \
 245   develop(bool, TraceLoopLimitCheck, false,                                 \
 246           "Trace generation of loop limits checks")                         \
 247                                                                             \
 248   develop(bool, TraceRangeLimitCheck, false,                                \
 249           "Trace additional overflow checks in RCE")                        \
 250                                                                             \
 251   /* OptimizeFill not yet supported on PowerPC. */                          \
 252   product(bool, OptimizeFill, true PPC64_ONLY(&& false),                    \
 253           "convert fill/copy loops into intrinsic")                         \
 254                                                                             \
 255   develop(bool, TraceOptimizeFill, false,                                   \
 256           "print detailed information about fill conversion")               \
 257                                                                             \
 258   develop(bool, OptoCoalesce, true,                                         \
 259           "Use Conservative Copy Coalescing in the Register Allocator")     \
 260                                                                             \
 261   develop(bool, UseUniqueSubclasses, true,                                  \
 262           "Narrow an abstract reference to the unique concrete subclass")   \
 263                                                                             \
 264   develop(bool, UseExactTypes, true,                                        \
 265           "Use exact types to eliminate array store checks and v-calls")    \
 266                                                                             \
 267   product(intx, TrackedInitializationLimit, 50,                             \
 268           "When initializing fields, track up to this many words")          \
 269           range(0, 65535)                                                   \
 270                                                                             \
 271   product(bool, ReduceFieldZeroing, true,                                   \
 272           "When initializing fields, try to avoid needless zeroing")        \
 273                                                                             \
 274   product(bool, ReduceInitialCardMarks, true,                               \
 275           "When initializing fields, try to avoid needless card marks")     \
 276                                                                             \
 277   product(bool, ReduceBulkZeroing, true,                                    \
 278           "When bulk-initializing, try to avoid needless zeroing")          \
 279                                                                             \
 280   product(bool, UseFPUForSpilling, false,                                   \
 281           "Spill integer registers to FPU instead of stack when possible")  \
 282                                                                             \
 283   develop_pd(intx, RegisterCostAreaRatio,                                   \
 284           "Spill selection in reg allocator: scale area by (X/64K) before " \
 285           "adding cost")                                                    \
 286                                                                             \
 287   develop_pd(bool, UseCISCSpill,                                            \
 288           "Use ADLC supplied cisc instructions during allocation")          \
 289                                                                             \
 290   notproduct(bool, VerifyGraphEdges , false,                                \
 291           "Verify Bi-directional Edges")                                    \
 292                                                                             \
 293   notproduct(bool, VerifyDUIterators, true,                                 \
 294           "Verify the safety of all iterations of Bi-directional Edges")    \
 295                                                                             \
 296   notproduct(bool, VerifyHashTableKeys, true,                               \
 297           "Verify the immutability of keys in the VN hash tables")          \
 298                                                                             \
 299   notproduct(bool, VerifyRegisterAllocator , false,                         \
 300           "Verify Register Allocator")                                      \
 301                                                                             \
 302   develop_pd(intx, FLOATPRESSURE,                                           \
 303           "Number of float LRG's that constitute high register pressure")   \
 304           range(0, max_jint)                                                \
 305                                                                             \
 306   develop_pd(intx, INTPRESSURE,                                             \
 307           "Number of integer LRG's that constitute high register pressure") \
 308           range(0, max_jint)                                                \
 309                                                                             \
 310   notproduct(bool, TraceOptoPipelining, false,                              \
 311           "Trace pipelining information")                                   \
 312                                                                             \
 313   notproduct(bool, TraceOptoOutput, false,                                  \
 314           "Trace pipelining information")                                   \
 315                                                                             \
 316   product_pd(bool, OptoScheduling,                                          \
 317           "Instruction Scheduling after register allocation")               \
 318                                                                             \
 319   product_pd(bool, OptoRegScheduling,                                       \
 320           "Instruction Scheduling before register allocation for pressure") \
 321                                                                             \
 322   product(bool, PartialPeelLoop, true,                                      \
 323           "Partial peel (rotate) loops")                                    \
 324                                                                             \
 325   product(intx, PartialPeelNewPhiDelta, 0,                                  \
 326           "Additional phis that can be created by partial peeling")         \
 327           range(0, max_jint)                                                \
 328                                                                             \
 329   notproduct(bool, TracePartialPeeling, false,                              \
 330           "Trace partial peeling (loop rotation) information")              \
 331                                                                             \
 332   product(bool, PartialPeelAtUnsignedTests, true,                           \
 333           "Partial peel at unsigned tests if no signed test exists")        \
 334                                                                             \
 335   product(bool, ReassociateInvariants, true,                                \
 336           "Enable reassociation of expressions with loop invariants.")      \
 337                                                                             \
 338   product(bool, LoopUnswitching, true,                                      \
 339           "Enable loop unswitching (a form of invariant test hoisting)")    \
 340                                                                             \
 341   notproduct(bool, TraceLoopUnswitching, false,                             \
 342           "Trace loop unswitching")                                         \
 343                                                                             \
 344   product(bool, AllowVectorizeOnDemand, true,                               \
 345           "Globally supress vectorization set in VectorizeMethod")          \
 346                                                                             \
 347   product(bool, UseSuperWord, true,                                         \
 348           "Transform scalar operations into superword operations")          \
 349                                                                             \
 350   develop(bool, SuperWordRTDepCheck, false,                                 \
 351           "Enable runtime dependency checks.")                              \
 352                                                                             \
 353   product(bool, SuperWordReductions, true,                                  \
 354           "Enable reductions support in superword.")                        \
 355                                                                             \
 356   product(bool, UseCMoveUnconditionally, false,                             \
 357           "Use CMove (scalar and vector) ignoring profitability test.")     \
 358                                                                             \
 359   product(bool, DoReserveCopyInSuperWord, true,                             \
 360           "Create reserve copy of graph in SuperWord.")                     \
 361                                                                             \
 362   notproduct(bool, TraceSuperWord, false,                                   \
 363           "Trace superword transforms")                                     \
 364                                                                             \
 365   notproduct(bool, TraceNewVectors, false,                                  \
 366           "Trace creation of Vector nodes")                                 \
 367                                                                             \
 368   product_pd(bool, OptoBundling,                                            \
 369           "Generate nops to fill i-cache lines")                            \
 370                                                                             \
 371   product_pd(intx, ConditionalMoveLimit,                                    \
 372           "Limit of ops to make speculative when using CMOVE")              \
 373           range(0, max_jint)                                                \
 374                                                                             \
 375   /* Set BranchOnRegister == false. See 4965987. */                         \
 376   product(bool, BranchOnRegister, false,                                    \
 377           "Use Sparc V9 branch-on-register opcodes")                        \
 378                                                                             \
 379   develop(bool, SparcV9RegsHiBitsZero, true,                                \
 380           "Assume Sparc V9 I&L registers on V8+ systems are zero-extended") \
 381                                                                             \
 382   product(bool, UseRDPCForConstantTableBase, false,                         \
 383           "Use Sparc RDPC instruction for the constant table base.")        \
 384                                                                             \
 385   notproduct(bool, PrintIdealGraph, false,                                  \
 386           "Print ideal graph to XML file / network interface. "             \
 387           "By default attempts to connect to the visualizer on a socket.")  \
 388                                                                             \
 389   notproduct(intx, PrintIdealGraphLevel, 0,                                 \
 390           "Level of detail of the ideal graph printout. "                   \
 391           "System-wide value, 0=nothing is printed, 4=all details printed. "\
 392           "Level of detail of printouts can be set on a per-method level "  \
 393           "as well by using CompileCommand=option.")                        \
 394           range(0, 4)                                                       \
 395                                                                             \
 396   notproduct(intx, PrintIdealGraphPort, 4444,                               \
 397           "Ideal graph printer to network port")                            \
 398           range(0, SHRT_MAX)                                                \
 399                                                                             \
 400   notproduct(ccstr, PrintIdealGraphAddress, "127.0.0.1",                    \
 401           "IP address to connect to visualizer")                            \
 402                                                                             \
 403   notproduct(ccstr, PrintIdealGraphFile, NULL,                              \
 404           "File to dump ideal graph to.  If set overrides the "             \
 405           "use of the network")                                             \
 406                                                                             \
 407   product(bool, UseBimorphicInlining, true,                                 \
 408           "Profiling based inlining for two receivers")                     \
 409                                                                             \
 410   product(bool, UseOnlyInlinedBimorphic, true,                              \
 411           "Don't use BimorphicInlining if can't inline a second method")    \
 412                                                                             \
 413   product(bool, InsertMemBarAfterArraycopy, true,                           \
 414           "Insert memory barrier after arraycopy call")                     \
 415                                                                             \
 416   develop(bool, SubsumeLoads, true,                                         \
 417           "Attempt to compile while subsuming loads into machine "          \
 418           "instructions.")                                                  \
 419                                                                             \
 420   develop(bool, StressRecompilation, false,                                 \
 421           "Recompile each compiled method without subsuming loads "         \
 422           "or escape analysis.")                                            \
 423                                                                             \
 424   develop(intx, ImplicitNullCheckThreshold, 3,                              \
 425           "Don't do implicit null checks if NPE's in a method exceeds "     \
 426           "limit")                                                          \
 427           range(0, max_jint)                                                \
 428                                                                             \
 429   product(intx, LoopOptsCount, 43,                                          \
 430           "Set level of loop optimization for tier 1 compiles")             \
 431           range(5, 43)                                                      \
 432                                                                             \
 433   /* controls for heat-based inlining */                                    \
 434                                                                             \
 435   develop(intx, NodeCountInliningCutoff, 18000,                             \
 436           "If parser node generation exceeds limit stop inlining")          \
 437           range(0, max_jint)                                                \
 438                                                                             \
 439   develop(intx, NodeCountInliningStep, 1000,                                \
 440           "Target size of warm calls inlined between optimization passes")  \
 441           range(0, max_jint)                                                \
 442                                                                             \
 443   develop(bool, InlineWarmCalls, false,                                     \
 444           "Use a heat-based priority queue to govern inlining")             \
 445                                                                             \
 446   develop(intx, HotCallCountThreshold, 999999,                              \
 447           "large numbers of calls (per method invocation) force hotness")   \
 448           range(0, max_intx)                                                \
 449                                                                             \
 450   develop(intx, HotCallProfitThreshold, 999999,                             \
 451           "highly profitable inlining opportunities force hotness")         \
 452           range(0, max_intx)                                                \
 453                                                                             \
 454   develop(intx, HotCallTrivialWork, -1,                                     \
 455           "trivial execution time (no larger than this) forces hotness")    \
 456           range(-1, max_intx)                                               \
 457                                                                             \
 458   develop(intx, HotCallTrivialSize, -1,                                     \
 459           "trivial methods (no larger than this) force calls to be hot")    \
 460           range(-1, max_intx)                                               \
 461                                                                             \
 462   develop(intx, WarmCallMinCount, -1,                                       \
 463           "number of calls (per method invocation) to enable inlining")     \
 464           range(-1, max_intx)                                               \
 465                                                                             \
 466   develop(intx, WarmCallMinProfit, -1,                                      \
 467           "number of calls (per method invocation) to enable inlining")     \
 468           range(-1, max_intx)                                               \
 469                                                                             \
 470   develop(intx, WarmCallMaxWork, 999999,                                    \
 471           "execution time of the largest inlinable method")                 \
 472           range(0, max_intx)                                                \
 473                                                                             \
 474   develop(intx, WarmCallMaxSize, 999999,                                    \
 475           "size of the largest inlinable method")                           \
 476           range(0, max_intx)                                                \
 477                                                                             \
 478   product(intx, MaxNodeLimit, 80000,                                        \
 479           "Maximum number of nodes")                                        \
 480           range(1000, max_jint / 3)                                         \
 481                                                                             \
 482   product(intx, NodeLimitFudgeFactor, 2000,                                 \
 483           "Fudge Factor for certain optimizations")                         \
 484           constraint(NodeLimitFudgeFactorConstraintFunc, AfterErgo)         \
 485                                                                             \
 486   product(bool, UseJumpTables, true,                                        \
 487           "Use JumpTables instead of a binary search tree for switches")    \
 488                                                                             \
 489   product(bool, UseDivMod, true,                                            \
 490           "Use combined DivMod instruction if available")                   \
 491                                                                             \
 492   product_pd(intx, MinJumpTableSize,                                        \
 493           "Minimum number of targets in a generated jump table")            \
 494           range(0, max_intx)                                                \
 495                                                                             \
 496   product(intx, MaxJumpTableSize, 65000,                                    \
 497           "Maximum number of targets in a generated jump table")            \
 498           range(0, max_intx)                                                \
 499                                                                             \
 500   product(intx, MaxJumpTableSparseness, 5,                                  \
 501           "Maximum sparseness for jumptables")                              \
 502           range(0, max_intx / 4)                                            \
 503                                                                             \
 504   product(bool, EliminateLocks, true,                                       \
 505           "Coarsen locks when possible")                                    \
 506                                                                             \
 507   product(bool, EliminateNestedLocks, true,                                 \
 508           "Eliminate nested locks of the same object when possible")        \
 509                                                                             \
 510   notproduct(bool, PrintLockStatistics, false,                              \
 511           "Print precise statistics on the dynamic lock usage")             \
 512                                                                             \
 513   diagnostic(bool, PrintPreciseBiasedLockingStatistics, false,              \
 514           "Print per-lock-site statistics of biased locking in JVM")        \
 515                                                                             \
 516   diagnostic(bool, PrintPreciseRTMLockingStatistics, false,                 \
 517           "Print per-lock-site statistics of rtm locking in JVM")           \
 518                                                                             \
 519   notproduct(bool, PrintEliminateLocks, false,                              \
 520           "Print out when locks are eliminated")                            \
 521                                                                             \
 522   product(bool, EliminateAutoBox, true,                                     \
 523           "Control optimizations for autobox elimination")                  \
 524                                                                             \
 525   diagnostic(bool, UseImplicitStableValues, true,                           \
 526           "Mark well-known stable fields as such (e.g. String.value)")      \
 527                                                                             \
 528   product(intx, AutoBoxCacheMax, 128,                                       \
 529           "Sets max value cached by the java.lang.Integer autobox cache")   \
 530           range(0, max_jint)                                                \
 531                                                                             \
 532   experimental(bool, AggressiveUnboxing, false,                             \
 533           "Control optimizations for aggressive boxing elimination")        \
 534                                                                             \
 535   develop(bool, TracePostallocExpand, false, "Trace expanding nodes after"  \
 536           " register allocation.")                                          \
 537                                                                             \
 538   product(bool, DoEscapeAnalysis, true,                                     \
 539           "Perform escape analysis")                                        \
 540                                                                             \
 541   product(double, EscapeAnalysisTimeout, 20. DEBUG_ONLY(+40.),              \
 542           "Abort EA when it reaches time limit (in sec)")                   \
 543           range(0, DBL_MAX)                                                 \
 544                                                                             \
 545   develop(bool, ExitEscapeAnalysisOnTimeout, true,                          \
 546           "Exit or throw assert in EA when it reaches time limit")          \
 547                                                                             \
 548   notproduct(bool, PrintEscapeAnalysis, false,                              \
 549           "Print the results of escape analysis")                           \
 550                                                                             \
 551   product(bool, EliminateAllocations, true,                                 \
 552           "Use escape analysis to eliminate allocations")                   \
 553                                                                             \
 554   notproduct(bool, PrintEliminateAllocations, false,                        \
 555           "Print out when allocations are eliminated")                      \
 556                                                                             \
 557   product(intx, EliminateAllocationArraySizeLimit, 64,                      \
 558           "Array size (number of elements) limit for scalar replacement")   \
 559           range(0, max_jint)                                                \
 560                                                                             \
 561   product(bool, OptimizePtrCompare, true,                                   \
 562           "Use escape analysis to optimize pointers compare")               \
 563                                                                             \
 564   notproduct(bool, PrintOptimizePtrCompare, false,                          \
 565           "Print information about optimized pointers compare")             \
 566                                                                             \
 567   notproduct(bool, VerifyConnectionGraph , true,                            \
 568           "Verify Connection Graph construction in Escape Analysis")        \
 569                                                                             \
 570   product(bool, UseOptoBiasInlining, true,                                  \
 571           "Generate biased locking code in C2 ideal graph")                 \
 572                                                                             \
 573   product(bool, OptimizeStringConcat, true,                                 \
 574           "Optimize the construction of Strings by StringBuilder")          \
 575                                                                             \
 576   notproduct(bool, PrintOptimizeStringConcat, false,                        \
 577           "Print information about transformations performed on Strings")   \
 578                                                                             \
 579   product(intx, ValueSearchLimit, 1000,                                     \
 580           "Recursion limit in PhaseMacroExpand::value_from_mem_phi")        \
 581           range(0, max_jint)                                                \
 582                                                                             \
 583   product(intx, MaxLabelRootDepth, 1100,                                    \
 584           "Maximum times call Label_Root to prevent stack overflow")        \
 585           range(100, max_jint)                                              \
 586                                                                             \
 587   diagnostic(intx, DominatorSearchLimit, 1000,                              \
 588           "Iterations limit in Node::dominates")                            \
 589           range(0, max_jint)                                                \
 590                                                                             \
 591   product(bool, BlockLayoutByFrequency, true,                               \
 592           "Use edge frequencies to drive block ordering")                   \
 593                                                                             \
 594   product(intx, BlockLayoutMinDiamondPercentage, 20,                        \
 595           "Miniumum %% of a successor (predecessor) for which block "       \
 596           "layout a will allow a fork (join) in a single chain")            \
 597           range(0, 100)                                                     \
 598                                                                             \
 599   product(bool, BlockLayoutRotateLoops, true,                               \
 600           "Allow back branches to be fall throughs in the block layout")    \
 601                                                                             \
 602   diagnostic(bool, InlineReflectionGetCallerClass, true,                    \
 603           "inline sun.reflect.Reflection.getCallerClass(), known to be "    \
 604           "part of base library DLL")                                       \
 605                                                                             \
 606   diagnostic(bool, InlineObjectCopy, true,                                  \
 607           "inline Object.clone and Arrays.copyOf[Range] intrinsics")        \
 608                                                                             \
 609   diagnostic(bool, SpecialStringCompareTo, true,                            \
 610           "special version of string compareTo")                            \
 611                                                                             \
 612   diagnostic(bool, SpecialStringIndexOf, true,                              \
 613           "special version of string indexOf")                              \
 614                                                                             \
 615   diagnostic(bool, SpecialStringEquals, true,                               \
 616           "special version of string equals")                               \
 617                                                                             \
 618   diagnostic(bool, SpecialArraysEquals, true,                               \
 619           "special version of Arrays.equals(char[],char[])")                \
 620                                                                             \
 621   diagnostic(bool, SpecialEncodeISOArray, true,                             \
 622           "special version of ISO_8859_1$Encoder.encodeISOArray")           \
 623                                                                             \
 624   develop(bool, BailoutToInterpreterForThrows, false,                       \
 625           "Compiled methods which throws/catches exceptions will be "       \
 626           "deopt and intp.")                                                \
 627                                                                             \
 628   develop(bool, ConvertCmpD2CmpF, true,                                     \
 629           "Convert cmpD to cmpF when one input is constant in float range") \
 630                                                                             \
 631   develop(bool, ConvertFloat2IntClipping, true,                             \
 632           "Convert float2int clipping idiom to integer clipping")           \
 633                                                                             \
 634   develop(bool, Use24BitFPMode, true,                                       \
 635           "Set 24-bit FPU mode on a per-compile basis ")                    \
 636                                                                             \
 637   develop(bool, Use24BitFP, true,                                           \
 638           "use FP instructions that produce 24-bit precise results")        \
 639                                                                             \
 640   develop(bool, MonomorphicArrayCheck, true,                                \
 641           "Uncommon-trap array store checks that require full type check")  \
 642                                                                             \
 643   notproduct(bool, TracePhaseCCP, false,                                    \
 644           "Print progress during Conditional Constant Propagation")         \
 645                                                                             \
 646   develop(bool, PrintDominators, false,                                     \
 647           "Print out dominator trees for GVN")                              \
 648                                                                             \
 649   diagnostic(bool, TraceSpilling, false,                                    \
 650           "Trace spilling")                                                 \
 651                                                                             \
 652   diagnostic(bool, TraceTypeProfile, false,                                 \
 653           "Trace type profile")                                             \
 654                                                                             \
 655   develop(bool, PoisonOSREntry, true,                                       \
 656            "Detect abnormal calls to OSR code")                             \
 657                                                                             \
 658   develop(bool, SoftMatchFailure, trueInProduct,                            \
 659           "If the DFA fails to match a node, print a message and bail out") \
 660                                                                             \
 661   develop(bool, InlineAccessors, true,                                      \
 662           "inline accessor methods (get/set)")                              \
 663                                                                             \
 664   product(intx, TypeProfileMajorReceiverPercent, 90,                        \
 665           "% of major receiver type to all profiled receivers")             \
 666           range(0, 100)                                                     \
 667                                                                             \
 668   diagnostic(bool, PrintIntrinsics, false,                                  \
 669           "prints attempted and successful inlining of intrinsics")         \
 670                                                                             \
 671   develop(bool, StressReflectiveCode, false,                                \
 672           "Use inexact types at allocations, etc., to test reflection")     \
 673                                                                             \
 674   diagnostic(bool, DebugInlinedCalls, true,                                 \
 675          "If false, restricts profiled locations to the root method only")  \
 676                                                                             \
 677   notproduct(bool, VerifyLoopOptimizations, false,                          \
 678           "verify major loop optimizations")                                \
 679                                                                             \
 680   diagnostic(bool, ProfileDynamicTypes, true,                               \
 681           "do extra type profiling and use it more aggressively")           \
 682                                                                             \
 683   develop(bool, TraceIterativeGVN, false,                                   \
 684           "Print progress during Iterative Global Value Numbering")         \
 685                                                                             \
 686   develop(bool, VerifyIterativeGVN, false,                                  \
 687           "Verify Def-Use modifications during sparse Iterative Global "    \
 688           "Value Numbering")                                                \
 689                                                                             \
 690   notproduct(bool, TraceCISCSpill, false,                                   \
 691           "Trace allocators use of cisc spillable instructions")            \
 692                                                                             \
 693   product(bool, SplitIfBlocks, true,                                        \
 694           "Clone compares and control flow through merge points to fold "   \
 695           "some branches")                                                  \
 696                                                                             \
 697   develop(intx, FreqCountInvocations,  1,                                   \
 698           "Scaling factor for branch frequencies (deprecated)")             \
 699           range(1, max_intx)                                                \
 700                                                                             \
 701   product(intx, AliasLevel,     3,                                          \
 702           "0 for no aliasing, 1 for oop/field/static/array split, "         \
 703           "2 for class split, 3 for unique instances")                      \
 704           range(0, 3)                                                       \
 705           constraint(AliasLevelConstraintFunc,AfterErgo)                    \
 706                                                                             \
 707   develop(bool, VerifyAliases, false,                                       \
 708           "perform extra checks on the results of alias analysis")          \
 709                                                                             \
 710   product(bool, IncrementalInline, true,                                    \
 711           "do post parse inlining")                                         \
 712                                                                             \
 713   develop(bool, AlwaysIncrementalInline, false,                             \
 714           "do all inlining incrementally")                                  \
 715                                                                             \
 716   product(intx, LiveNodeCountInliningCutoff, 40000,                         \
 717           "max number of live nodes in a method")                           \
 718           range(0, max_juint / 8)                                           \
 719                                                                             \
 720   diagnostic(bool, OptimizeExpensiveOps, true,                              \
 721           "Find best control for expensive operations")                     \
 722                                                                             \
 723   diagnostic(bool, UseMathExactIntrinsics, true,                            \
 724           "Enables intrinsification of various java.lang.Math functions")   \
 725                                                                             \
 726   diagnostic(bool, UseMultiplyToLenIntrinsic, false,                        \
 727           "Enables intrinsification of BigInteger.multiplyToLen()")         \
 728                                                                             \
 729   diagnostic(bool, UseSquareToLenIntrinsic, false,                          \
 730           "Enables intrinsification of BigInteger.squareToLen()")           \
 731                                                                             \
 732   diagnostic(bool, UseMulAddIntrinsic, false,                               \
 733           "Enables intrinsification of BigInteger.mulAdd()")                \
 734                                                                             \
 735   diagnostic(bool, UseMontgomeryMultiplyIntrinsic, false,                   \
 736           "Enables intrinsification of BigInteger.montgomeryMultiply()")    \
 737                                                                             \
 738   diagnostic(bool, UseMontgomerySquareIntrinsic, false,                     \
 739           "Enables intrinsification of BigInteger.montgomerySquare()")      \
 740                                                                             \
 741   product(bool, UseTypeSpeculation, true,                                   \
 742           "Speculatively propagate types from profiles")                    \
 743                                                                             \
 744   diagnostic(bool, UseInlineDepthForSpeculativeTypes, true,                 \
 745           "Carry inline depth of profile point with speculative type "      \
 746           "and give priority to profiling from lower inline depth")         \
 747                                                                             \
 748   product_pd(bool, TrapBasedRangeChecks,                                    \
 749           "Generate code for range checks that uses a cmp and trap "        \
 750           "instruction raising SIGTRAP. Used on PPC64.")                    \
 751                                                                             \
 752   product(intx, ArrayCopyLoadStoreMaxElem, 8,                               \
 753           "Maximum number of arraycopy elements inlined as a sequence of"   \
 754           "loads/stores")                                                   \
 755           range(0, max_intx)                                                \
 756                                                                             \
 757   develop(bool, StressArrayCopyMacroNode, false,                            \
 758           "Perform ArrayCopy load/store replacement during IGVN only")      \
 759                                                                             \
 760   develop(bool, RenumberLiveNodes, true,                                    \
 761           "Renumber live nodes")                                            \
 762 
 763 C2_FLAGS(DECLARE_DEVELOPER_FLAG, \
 764          DECLARE_PD_DEVELOPER_FLAG, \
 765          DECLARE_PRODUCT_FLAG, \
 766          DECLARE_PD_PRODUCT_FLAG, \
 767          DECLARE_DIAGNOSTIC_FLAG, \
 768          DECLARE_PD_DIAGNOSTIC_FLAG, \
 769          DECLARE_EXPERIMENTAL_FLAG, \
 770          DECLARE_NOTPRODUCT_FLAG, \
 771          IGNORE_RANGE, \
 772          IGNORE_CONSTRAINT, \
 773          IGNORE_WRITEABLE)
 774 
 775 #endif // SHARE_VM_OPTO_C2_GLOBALS_HPP