1 /*
   2  * Copyright (c) 2000, 2019, 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_OPTO_C2_GLOBALS_HPP
  26 #define SHARE_OPTO_C2_GLOBALS_HPP
  27 
  28 #include "runtime/globals.hpp"
  29 #include "utilities/macros.hpp"
  30 
  31 #include CPU_HEADER(c2_globals)
  32 #include OS_HEADER(c2_globals)
  33 
  34 //
  35 // Defines all globals flags used by the server compiler.
  36 //
  37 
  38 #define C2_FLAGS(develop, \
  39                  develop_pd, \
  40                  product, \
  41                  product_pd, \
  42                  diagnostic, \
  43                  diagnostic_pd, \
  44                  experimental, \
  45                  notproduct, \
  46                  range, \
  47                  constraint, \
  48                  writeable) \
  49                                                                             \
  50   diagnostic(bool, StressLCM, false,                                        \
  51           "Randomize instruction scheduling in LCM")                        \
  52                                                                             \
  53   diagnostic(bool, StressGCM, false,                                        \
  54           "Randomize instruction scheduling in GCM")                        \
  55                                                                             \
  56   develop(bool, StressMethodHandleLinkerInlining, false,                    \
  57           "Stress inlining through method handle linkers")                  \
  58                                                                             \
  59   develop(intx, OptoPrologueNops, 0,                                        \
  60           "Insert this many extra nop instructions "                        \
  61           "in the prologue of every nmethod")                               \
  62           range(0, 128)                                                     \
  63                                                                             \
  64   product_pd(intx, InteriorEntryAlignment,                                  \
  65           "Code alignment for interior entry points "                       \
  66           "in generated code (in bytes)")                                   \
  67           constraint(InteriorEntryAlignmentConstraintFunc, AfterErgo)       \
  68                                                                             \
  69   product(intx, MaxLoopPad, (OptoLoopAlignment-1),                          \
  70           "Align a loop if padding size in bytes is less or equal to this " \
  71           "value")                                                          \
  72           range(0, max_jint)                                                \
  73                                                                             \
  74   product(intx, MaxVectorSize, 64,                                          \
  75           "Max vector size in bytes, "                                      \
  76           "actual size could be less depending on elements type")           \
  77           range(0, max_jint)                                                \
  78                                                                             \
  79   product(bool, AlignVector, true,                                          \
  80           "Perform vector store/load alignment in loop")                    \
  81                                                                             \
  82   product(intx, NumberOfLoopInstrToAlign, 4,                                \
  83           "Number of first instructions in a loop to align")                \
  84           range(0, max_jint)                                                \
  85                                                                             \
  86   notproduct(intx, IndexSetWatch, 0,                                        \
  87           "Trace all operations on this IndexSet (-1 means all, 0 none)")   \
  88           range(-1, 0)                                                      \
  89                                                                             \
  90   develop(intx, OptoNodeListSize, 4,                                        \
  91           "Starting allocation size of Node_List data structures")          \
  92           range(0, max_jint)                                                \
  93                                                                             \
  94   develop(intx, OptoBlockListSize, 8,                                       \
  95           "Starting allocation size of Block_List data structures")         \
  96           range(0, max_jint)                                                \
  97                                                                             \
  98   develop(intx, OptoPeepholeAt, -1,                                         \
  99           "Apply peephole optimizations to this peephole rule")             \
 100                                                                             \
 101   notproduct(bool, PrintIdeal, false,                                       \
 102           "Print ideal graph before code generation")                       \
 103                                                                             \
 104   notproduct(bool, PrintOpto, false,                                        \
 105           "Print compiler2 attempts")                                       \
 106                                                                             \
 107   notproduct(bool, PrintOptoInlining, false,                                \
 108           "Print compiler2 inlining decisions")                             \
 109                                                                             \
 110   notproduct(bool, VerifyOpto, false,                                       \
 111           "Apply more time consuming verification during compilation")      \
 112                                                                             \
 113   notproduct(bool, VerifyIdealNodeCount, false,                             \
 114           "Verify that tracked dead ideal node count is accurate")          \
 115                                                                             \
 116   notproduct(bool, PrintIdealNodeCount, false,                              \
 117           "Print liveness counts of ideal nodes")                           \
 118                                                                             \
 119   notproduct(bool, VerifyOptoOopOffsets, false,                             \
 120           "Check types of base addresses in field references")              \
 121                                                                             \
 122   develop(bool, IdealizedNumerics, false,                                   \
 123           "Check performance difference allowing FP "                       \
 124           "associativity and commutativity...")                             \
 125                                                                             \
 126   diagnostic_pd(bool, IdealizeClearArrayNode,                               \
 127           "Replace ClearArrayNode by subgraph of basic operations.")        \
 128                                                                             \
 129   develop(bool, OptoBreakpoint, false,                                      \
 130           "insert breakpoint at method entry")                              \
 131                                                                             \
 132   notproduct(bool, OptoBreakpointOSR, false,                                \
 133           "insert breakpoint at osr method entry")                          \
 134                                                                             \
 135   notproduct(intx, BreakAtNode, 0,                                          \
 136           "Break at construction of this Node (either _idx or _debug_idx)") \
 137                                                                             \
 138   notproduct(bool, OptoBreakpointC2R, false,                                \
 139           "insert breakpoint at runtime stub entry")                        \
 140                                                                             \
 141   notproduct(bool, OptoNoExecute, false,                                    \
 142           "Attempt to parse and compile but do not execute generated code") \
 143                                                                             \
 144   notproduct(bool, PrintOptoStatistics, false,                              \
 145           "Print New compiler statistics")                                  \
 146                                                                             \
 147   diagnostic(bool, PrintOptoAssembly, false,                                \
 148           "Print New compiler assembly output")                             \
 149                                                                             \
 150   develop_pd(bool, OptoPeephole,                                            \
 151           "Apply peephole optimizations after register allocation")         \
 152                                                                             \
 153   develop(bool, OptoRemoveUseless, true,                                    \
 154           "Remove useless nodes after parsing")                             \
 155                                                                             \
 156   notproduct(bool, PrintFrameConverterAssembly, false,                      \
 157           "Print New compiler assembly output for frame converters")        \
 158                                                                             \
 159   notproduct(bool, PrintParseStatistics, false,                             \
 160           "Print nodes, transforms and new values made per bytecode parsed")\
 161                                                                             \
 162   notproduct(bool, PrintOptoPeephole, false,                                \
 163           "Print New compiler peephole replacements")                       \
 164                                                                             \
 165   develop(bool, PrintCFGBlockFreq, false,                                   \
 166           "Print CFG block freqencies")                                     \
 167                                                                             \
 168   develop(bool, TraceOptoParse, false,                                      \
 169           "Trace bytecode parse and control-flow merge")                    \
 170                                                                             \
 171   product_pd(intx,  LoopUnrollLimit,                                        \
 172           "Unroll loop bodies with node count less than this")              \
 173           range(0, max_jint / 4)                                            \
 174                                                                             \
 175   product_pd(intx, LoopPercentProfileLimit,                                 \
 176              "Unroll loop bodies with % node count of profile limit")       \
 177              range(10, 100)                                                 \
 178                                                                             \
 179   product(intx,  LoopMaxUnroll, 16,                                         \
 180           "Maximum number of unrolls for main loop")                        \
 181           range(0, max_jint)                                                \
 182                                                                             \
 183   product_pd(bool,  SuperWordLoopUnrollAnalysis,                            \
 184            "Map number of unrolls for main loop via "                       \
 185            "Superword Level Parallelism analysis")                          \
 186                                                                             \
 187   experimental(bool, PostLoopMultiversioning, false,                        \
 188            "Multi versioned post loops to eliminate range checks")          \
 189                                                                             \
 190   notproduct(bool, TraceSuperWordLoopUnrollAnalysis, false,                 \
 191           "Trace what Superword Level Parallelism analysis applies")        \
 192                                                                             \
 193   product(intx,  LoopUnrollMin, 4,                                          \
 194           "Minimum number of unroll loop bodies before checking progress"   \
 195           "of rounds of unroll,optimize,..")                                \
 196           range(0, max_jint)                                                \
 197                                                                             \
 198   product(bool, UseSubwordForMaxVector, true,                               \
 199           "Use Subword Analysis to set maximum vector size")                \
 200                                                                             \
 201   product(bool, UseVectorCmov, false,                                       \
 202           "Use Vectorized Cmov")                                            \
 203                                                                             \
 204   develop(intx, UnrollLimitForProfileCheck, 1,                              \
 205           "Don't use profile_trip_cnt() to restrict unrolling until "       \
 206           "unrolling would push the number of unrolled iterations above "   \
 207           "UnrollLimitForProfileCheck. A higher value allows more "         \
 208           "unrolling. Zero acts as a very large value." )                   \
 209           range(0, max_intx)                                                \
 210                                                                             \
 211   product(intx, MultiArrayExpandLimit, 6,                                   \
 212           "Maximum number of individual allocations in an inline-expanded " \
 213           "multianewarray instruction")                                     \
 214           range(0, max_jint)                                                \
 215                                                                             \
 216   notproduct(bool, TraceProfileTripCount, false,                            \
 217           "Trace profile loop trip count information")                      \
 218                                                                             \
 219   product(bool, UseCountedLoopSafepoints, false,                            \
 220           "Force counted loops to keep a safepoint")                        \
 221                                                                             \
 222   product(bool, UseLoopPredicate, true,                                     \
 223           "Generate a predicate to select fast/slow loop versions")         \
 224                                                                             \
 225   develop(bool, TraceLoopPredicate, false,                                  \
 226           "Trace generation of loop predicates")                            \
 227                                                                             \
 228   develop(bool, TraceLoopOpts, false,                                       \
 229           "Trace executed loop optimizations")                              \
 230                                                                             \
 231   develop(bool, TraceLoopLimitCheck, false,                                 \
 232           "Trace generation of loop limits checks")                         \
 233                                                                             \
 234   develop(bool, TraceRangeLimitCheck, false,                                \
 235           "Trace additional overflow checks in RCE")                        \
 236                                                                             \
 237   /* OptimizeFill not yet supported on PowerPC. */                          \
 238   product(bool, OptimizeFill, true PPC64_ONLY(&& false),                    \
 239           "convert fill/copy loops into intrinsic")                         \
 240                                                                             \
 241   develop(bool, TraceOptimizeFill, false,                                   \
 242           "print detailed information about fill conversion")               \
 243                                                                             \
 244   develop(bool, OptoCoalesce, true,                                         \
 245           "Use Conservative Copy Coalescing in the Register Allocator")     \
 246                                                                             \
 247   develop(bool, UseUniqueSubclasses, true,                                  \
 248           "Narrow an abstract reference to the unique concrete subclass")   \
 249                                                                             \
 250   develop(bool, UseExactTypes, true,                                        \
 251           "Use exact types to eliminate array store checks and v-calls")    \
 252                                                                             \
 253   product(intx, TrackedInitializationLimit, 50,                             \
 254           "When initializing fields, track up to this many words")          \
 255           range(0, 65535)                                                   \
 256                                                                             \
 257   product(bool, ReduceFieldZeroing, true,                                   \
 258           "When initializing fields, try to avoid needless zeroing")        \
 259                                                                             \
 260   product(bool, ReduceInitialCardMarks, true,                               \
 261           "When initializing fields, try to avoid needless card marks")     \
 262                                                                             \
 263   product(bool, ReduceBulkZeroing, true,                                    \
 264           "When bulk-initializing, try to avoid needless zeroing")          \
 265                                                                             \
 266   product(bool, UseFPUForSpilling, false,                                   \
 267           "Spill integer registers to FPU instead of stack when possible")  \
 268                                                                             \
 269   develop_pd(intx, RegisterCostAreaRatio,                                   \
 270           "Spill selection in reg allocator: scale area by (X/64K) before " \
 271           "adding cost")                                                    \
 272                                                                             \
 273   develop_pd(bool, UseCISCSpill,                                            \
 274           "Use ADLC supplied cisc instructions during allocation")          \
 275                                                                             \
 276   notproduct(bool, VerifyGraphEdges , false,                                \
 277           "Verify Bi-directional Edges")                                    \
 278                                                                             \
 279   notproduct(bool, VerifyDUIterators, true,                                 \
 280           "Verify the safety of all iterations of Bi-directional Edges")    \
 281                                                                             \
 282   notproduct(bool, VerifyHashTableKeys, true,                               \
 283           "Verify the immutability of keys in the VN hash tables")          \
 284                                                                             \
 285   notproduct(bool, VerifyRegisterAllocator , false,                         \
 286           "Verify Register Allocator")                                      \
 287                                                                             \
 288   develop_pd(intx, FLOATPRESSURE,                                           \
 289           "Number of float LRG's that constitute high register pressure")   \
 290           range(0, max_jint)                                                \
 291                                                                             \
 292   develop_pd(intx, INTPRESSURE,                                             \
 293           "Number of integer LRG's that constitute high register pressure") \
 294           range(0, max_jint)                                                \
 295                                                                             \
 296   notproduct(bool, TraceOptoPipelining, false,                              \
 297           "Trace pipelining information")                                   \
 298                                                                             \
 299   notproduct(bool, TraceOptoOutput, false,                                  \
 300           "Trace pipelining information")                                   \
 301                                                                             \
 302   product_pd(bool, OptoScheduling,                                          \
 303           "Instruction Scheduling after register allocation")               \
 304                                                                             \
 305   product_pd(bool, OptoRegScheduling,                                       \
 306           "Instruction Scheduling before register allocation for pressure") \
 307                                                                             \
 308   product(bool, PartialPeelLoop, true,                                      \
 309           "Partial peel (rotate) loops")                                    \
 310                                                                             \
 311   product(intx, PartialPeelNewPhiDelta, 0,                                  \
 312           "Additional phis that can be created by partial peeling")         \
 313           range(0, max_jint)                                                \
 314                                                                             \
 315   notproduct(bool, TracePartialPeeling, false,                              \
 316           "Trace partial peeling (loop rotation) information")              \
 317                                                                             \
 318   product(bool, PartialPeelAtUnsignedTests, true,                           \
 319           "Partial peel at unsigned tests if no signed test exists")        \
 320                                                                             \
 321   product(bool, ReassociateInvariants, true,                                \
 322           "Enable reassociation of expressions with loop invariants.")      \
 323                                                                             \
 324   product(bool, LoopUnswitching, true,                                      \
 325           "Enable loop unswitching (a form of invariant test hoisting)")    \
 326                                                                             \
 327   notproduct(bool, TraceLoopUnswitching, false,                             \
 328           "Trace loop unswitching")                                         \
 329                                                                             \
 330   product(bool, AllowVectorizeOnDemand, true,                               \
 331           "Globally supress vectorization set in VectorizeMethod")          \
 332                                                                             \
 333   product(bool, UseSuperWord, true,                                         \
 334           "Transform scalar operations into superword operations")          \
 335                                                                             \
 336   develop(bool, SuperWordRTDepCheck, false,                                 \
 337           "Enable runtime dependency checks.")                              \
 338                                                                             \
 339   product(bool, SuperWordReductions, true,                                  \
 340           "Enable reductions support in superword.")                        \
 341                                                                             \
 342   product(bool, UseCMoveUnconditionally, false,                             \
 343           "Use CMove (scalar and vector) ignoring profitability test.")     \
 344                                                                             \
 345   product(bool, DoReserveCopyInSuperWord, true,                             \
 346           "Create reserve copy of graph in SuperWord.")                     \
 347                                                                             \
 348   notproduct(bool, TraceSuperWord, false,                                   \
 349           "Trace superword transforms")                                     \
 350                                                                             \
 351   notproduct(bool, TraceNewVectors, false,                                  \
 352           "Trace creation of Vector nodes")                                 \
 353                                                                             \
 354   product_pd(bool, OptoBundling,                                            \
 355           "Generate nops to fill i-cache lines")                            \
 356                                                                             \
 357   product_pd(intx, ConditionalMoveLimit,                                    \
 358           "Limit of ops to make speculative when using CMOVE")              \
 359           range(0, max_jint)                                                \
 360                                                                             \
 361   /* Set BranchOnRegister == false. See 4965987. */                         \
 362   product(bool, BranchOnRegister, false,                                    \
 363           "Use Sparc V9 branch-on-register opcodes")                        \
 364                                                                             \
 365   develop(bool, SparcV9RegsHiBitsZero, true,                                \
 366           "Assume Sparc V9 I&L registers on V8+ systems are zero-extended") \
 367                                                                             \
 368   product(bool, UseRDPCForConstantTableBase, false,                         \
 369           "Use Sparc RDPC instruction for the constant table base.")        \
 370                                                                             \
 371   notproduct(bool, PrintIdealGraph, false,                                  \
 372           "Print ideal graph to XML file / network interface. "             \
 373           "By default attempts to connect to the visualizer on a socket.")  \
 374                                                                             \
 375   notproduct(intx, PrintIdealGraphLevel, 0,                                 \
 376           "Level of detail of the ideal graph printout. "                   \
 377           "System-wide value, 0=nothing is printed, 4=all details printed. "\
 378           "Level of detail of printouts can be set on a per-method level "  \
 379           "as well by using CompileCommand=option.")                        \
 380           range(0, 4)                                                       \
 381                                                                             \
 382   notproduct(intx, PrintIdealGraphPort, 4444,                               \
 383           "Ideal graph printer to network port")                            \
 384           range(0, SHRT_MAX)                                                \
 385                                                                             \
 386   notproduct(ccstr, PrintIdealGraphAddress, "127.0.0.1",                    \
 387           "IP address to connect to visualizer")                            \
 388                                                                             \
 389   notproduct(ccstr, PrintIdealGraphFile, NULL,                              \
 390           "File to dump ideal graph to.  If set overrides the "             \
 391           "use of the network")                                             \
 392                                                                             \
 393   product(bool, UseBimorphicInlining, true,                                 \
 394           "Profiling based inlining for two receivers")                     \
 395                                                                             \
 396   product(bool, UseOnlyInlinedBimorphic, true,                              \
 397           "Don't use BimorphicInlining if can't inline a second method")    \
 398                                                                             \
 399   product(bool, InsertMemBarAfterArraycopy, true,                           \
 400           "Insert memory barrier after arraycopy call")                     \
 401                                                                             \
 402   develop(bool, SubsumeLoads, true,                                         \
 403           "Attempt to compile while subsuming loads into machine "          \
 404           "instructions.")                                                  \
 405                                                                             \
 406   develop(bool, StressRecompilation, false,                                 \
 407           "Recompile each compiled method without subsuming loads "         \
 408           "or escape analysis.")                                            \
 409                                                                             \
 410   develop(intx, ImplicitNullCheckThreshold, 3,                              \
 411           "Don't do implicit null checks if NPE's in a method exceeds "     \
 412           "limit")                                                          \
 413           range(0, max_jint)                                                \
 414                                                                             \
 415   product(intx, LoopOptsCount, 43,                                          \
 416           "Set level of loop optimization for tier 1 compiles")             \
 417           range(5, 43)                                                      \
 418                                                                             \
 419   /* controls for heat-based inlining */                                    \
 420                                                                             \
 421   develop(intx, NodeCountInliningCutoff, 18000,                             \
 422           "If parser node generation exceeds limit stop inlining")          \
 423           range(0, max_jint)                                                \
 424                                                                             \
 425   develop(intx, NodeCountInliningStep, 1000,                                \
 426           "Target size of warm calls inlined between optimization passes")  \
 427           range(0, max_jint)                                                \
 428                                                                             \
 429   develop(bool, InlineWarmCalls, false,                                     \
 430           "Use a heat-based priority queue to govern inlining")             \
 431                                                                             \
 432   /* Max values must not exceed WarmCallInfo::MAX_VALUE(). */               \
 433   develop(intx, HotCallCountThreshold, 999999,                              \
 434           "large numbers of calls (per method invocation) force hotness")   \
 435           range(0, ((intx)MIN2((int64_t)max_intx,(int64_t)(+1.0e10))))      \
 436                                                                             \
 437   develop(intx, HotCallProfitThreshold, 999999,                             \
 438           "highly profitable inlining opportunities force hotness")         \
 439           range(0, ((intx)MIN2((int64_t)max_intx,(int64_t)(+1.0e10))))      \
 440                                                                             \
 441   develop(intx, HotCallTrivialWork, -1,                                     \
 442           "trivial execution time (no larger than this) forces hotness")    \
 443           range(-1, ((intx)MIN2((int64_t)max_intx,(int64_t)(+1.0e10))))     \
 444                                                                             \
 445   develop(intx, HotCallTrivialSize, -1,                                     \
 446           "trivial methods (no larger than this) force calls to be hot")    \
 447           range(-1, ((intx)MIN2((int64_t)max_intx,(int64_t)(+1.0e10))))     \
 448                                                                             \
 449   develop(intx, WarmCallMinCount, -1,                                       \
 450           "number of calls (per method invocation) to enable inlining")     \
 451           range(-1, ((intx)MIN2((int64_t)max_intx,(int64_t)(+1.0e10))))     \
 452                                                                             \
 453   develop(intx, WarmCallMinProfit, -1,                                      \
 454           "number of calls (per method invocation) to enable inlining")     \
 455           range(-1, ((intx)MIN2((int64_t)max_intx,(int64_t)(+1.0e10))))     \
 456                                                                             \
 457   develop(intx, WarmCallMaxWork, 999999,                                    \
 458           "execution time of the largest inlinable method")                 \
 459           range(0, ((intx)MIN2((int64_t)max_intx,(int64_t)(+1.0e10))))      \
 460                                                                             \
 461   develop(intx, WarmCallMaxSize, 999999,                                    \
 462           "size of the largest inlinable method")                           \
 463           range(0, ((intx)MIN2((int64_t)max_intx,(int64_t)(+1.0e10))))      \
 464                                                                             \
 465   product(intx, MaxNodeLimit, 80000,                                        \
 466           "Maximum number of nodes")                                        \
 467           range(1000, max_jint / 3)                                         \
 468                                                                             \
 469   product(intx, NodeLimitFudgeFactor, 2000,                                 \
 470           "Fudge Factor for certain optimizations")                         \
 471           constraint(NodeLimitFudgeFactorConstraintFunc, AfterErgo)         \
 472                                                                             \
 473   product(bool, UseJumpTables, true,                                        \
 474           "Use JumpTables instead of a binary search tree for switches")    \
 475                                                                             \
 476   product(bool, UseDivMod, true,                                            \
 477           "Use combined DivMod instruction if available")                   \
 478                                                                             \
 479   product_pd(intx, MinJumpTableSize,                                        \
 480           "Minimum number of targets in a generated jump table")            \
 481           range(0, max_intx)                                                \
 482                                                                             \
 483   product(intx, MaxJumpTableSize, 65000,                                    \
 484           "Maximum number of targets in a generated jump table")            \
 485           range(0, max_intx)                                                \
 486                                                                             \
 487   product(intx, MaxJumpTableSparseness, 5,                                  \
 488           "Maximum sparseness for jumptables")                              \
 489           range(0, max_intx / 4)                                            \
 490                                                                             \
 491   product(bool, EliminateLocks, true,                                       \
 492           "Coarsen locks when possible")                                    \
 493                                                                             \
 494   product(bool, EliminateNestedLocks, true,                                 \
 495           "Eliminate nested locks of the same object when possible")        \
 496                                                                             \
 497   notproduct(bool, PrintLockStatistics, false,                              \
 498           "Print precise statistics on the dynamic lock usage")             \
 499                                                                             \
 500   diagnostic(bool, PrintPreciseBiasedLockingStatistics, false,              \
 501           "Print per-lock-site statistics of biased locking in JVM")        \
 502                                                                             \
 503   diagnostic(bool, PrintPreciseRTMLockingStatistics, false,                 \
 504           "Print per-lock-site statistics of rtm locking in JVM")           \
 505                                                                             \
 506   notproduct(bool, PrintEliminateLocks, false,                              \
 507           "Print out when locks are eliminated")                            \
 508                                                                             \
 509   product(bool, EliminateAutoBox, true,                                     \
 510           "Control optimizations for autobox elimination")                  \
 511                                                                             \
 512   product(intx, AutoBoxCacheMax, 128,                                       \
 513           "Sets max value cached by the java.lang.Integer autobox cache")   \
 514           range(0, max_jint)                                                \
 515                                                                             \
 516   experimental(bool, AggressiveUnboxing, true,                              \
 517           "Control optimizations for aggressive boxing elimination")        \
 518                                                                             \
 519   develop(bool, TracePostallocExpand, false, "Trace expanding nodes after"  \
 520           " register allocation.")                                          \
 521                                                                             \
 522   product(bool, DoEscapeAnalysis, true,                                     \
 523           "Perform escape analysis")                                        \
 524                                                                             \
 525   product(double, EscapeAnalysisTimeout, 20. DEBUG_ONLY(+40.),              \
 526           "Abort EA when it reaches time limit (in sec)")                   \
 527           range(0, DBL_MAX)                                                 \
 528                                                                             \
 529   develop(bool, ExitEscapeAnalysisOnTimeout, true,                          \
 530           "Exit or throw assert in EA when it reaches time limit")          \
 531                                                                             \
 532   notproduct(bool, PrintEscapeAnalysis, false,                              \
 533           "Print the results of escape analysis")                           \
 534                                                                             \
 535   product(bool, EliminateAllocations, true,                                 \
 536           "Use escape analysis to eliminate allocations")                   \
 537                                                                             \
 538   notproduct(bool, PrintEliminateAllocations, false,                        \
 539           "Print out when allocations are eliminated")                      \
 540                                                                             \
 541   product(intx, EliminateAllocationArraySizeLimit, 64,                      \
 542           "Array size (number of elements) limit for scalar replacement")   \
 543           range(0, max_jint)                                                \
 544                                                                             \
 545   product(bool, OptimizePtrCompare, true,                                   \
 546           "Use escape analysis to optimize pointers compare")               \
 547                                                                             \
 548   notproduct(bool, PrintOptimizePtrCompare, false,                          \
 549           "Print information about optimized pointers compare")             \
 550                                                                             \
 551   notproduct(bool, VerifyConnectionGraph , true,                            \
 552           "Verify Connection Graph construction in Escape Analysis")        \
 553                                                                             \
 554   product(bool, UseOptoBiasInlining, true,                                  \
 555           "Generate biased locking code in C2 ideal graph")                 \
 556                                                                             \
 557   product(bool, OptimizeStringConcat, true,                                 \
 558           "Optimize the construction of Strings by StringBuilder")          \
 559                                                                             \
 560   notproduct(bool, PrintOptimizeStringConcat, false,                        \
 561           "Print information about transformations performed on Strings")   \
 562                                                                             \
 563   product(intx, ValueSearchLimit, 1000,                                     \
 564           "Recursion limit in PhaseMacroExpand::value_from_mem_phi")        \
 565           range(0, max_jint)                                                \
 566                                                                             \
 567   product(intx, MaxLabelRootDepth, 1100,                                    \
 568           "Maximum times call Label_Root to prevent stack overflow")        \
 569           range(100, max_jint)                                              \
 570                                                                             \
 571   diagnostic(intx, DominatorSearchLimit, 1000,                              \
 572           "Iterations limit in Node::dominates")                            \
 573           range(0, max_jint)                                                \
 574                                                                             \
 575   product(bool, BlockLayoutByFrequency, true,                               \
 576           "Use edge frequencies to drive block ordering")                   \
 577                                                                             \
 578   product(intx, BlockLayoutMinDiamondPercentage, 20,                        \
 579           "Miniumum %% of a successor (predecessor) for which block "       \
 580           "layout a will allow a fork (join) in a single chain")            \
 581           range(0, 100)                                                     \
 582                                                                             \
 583   product(bool, BlockLayoutRotateLoops, true,                               \
 584           "Allow back branches to be fall throughs in the block layout")    \
 585                                                                             \
 586   diagnostic(bool, InlineReflectionGetCallerClass, true,                    \
 587           "inline sun.reflect.Reflection.getCallerClass(), known to be "    \
 588           "part of base library DLL")                                       \
 589                                                                             \
 590   diagnostic(bool, InlineObjectCopy, true,                                  \
 591           "inline Object.clone and Arrays.copyOf[Range] intrinsics")        \
 592                                                                             \
 593   diagnostic(bool, SpecialStringCompareTo, true,                            \
 594           "special version of string compareTo")                            \
 595                                                                             \
 596   diagnostic(bool, SpecialStringIndexOf, true,                              \
 597           "special version of string indexOf")                              \
 598                                                                             \
 599   diagnostic(bool, SpecialStringEquals, true,                               \
 600           "special version of string equals")                               \
 601                                                                             \
 602   diagnostic(bool, SpecialArraysEquals, true,                               \
 603           "special version of Arrays.equals(char[],char[])")                \
 604                                                                             \
 605   diagnostic(bool, SpecialEncodeISOArray, true,                             \
 606           "special version of ISO_8859_1$Encoder.encodeISOArray")           \
 607                                                                             \
 608   develop(bool, BailoutToInterpreterForThrows, false,                       \
 609           "Compiled methods which throws/catches exceptions will be "       \
 610           "deopt and intp.")                                                \
 611                                                                             \
 612   develop(bool, ConvertCmpD2CmpF, true,                                     \
 613           "Convert cmpD to cmpF when one input is constant in float range") \
 614                                                                             \
 615   develop(bool, ConvertFloat2IntClipping, true,                             \
 616           "Convert float2int clipping idiom to integer clipping")           \
 617                                                                             \
 618   develop(bool, Use24BitFPMode, true,                                       \
 619           "Set 24-bit FPU mode on a per-compile basis ")                    \
 620                                                                             \
 621   develop(bool, Use24BitFP, true,                                           \
 622           "use FP instructions that produce 24-bit precise results")        \
 623                                                                             \
 624   develop(bool, MonomorphicArrayCheck, true,                                \
 625           "Uncommon-trap array store checks that require full type check")  \
 626                                                                             \
 627   notproduct(bool, TracePhaseCCP, false,                                    \
 628           "Print progress during Conditional Constant Propagation")         \
 629                                                                             \
 630   develop(bool, PrintDominators, false,                                     \
 631           "Print out dominator trees for GVN")                              \
 632                                                                             \
 633   diagnostic(bool, TraceSpilling, false,                                    \
 634           "Trace spilling")                                                 \
 635                                                                             \
 636   diagnostic(bool, TraceTypeProfile, false,                                 \
 637           "Trace type profile")                                             \
 638                                                                             \
 639   develop(bool, PoisonOSREntry, true,                                       \
 640            "Detect abnormal calls to OSR code")                             \
 641                                                                             \
 642   develop(bool, SoftMatchFailure, trueInProduct,                            \
 643           "If the DFA fails to match a node, print a message and bail out") \
 644                                                                             \
 645   develop(bool, InlineAccessors, true,                                      \
 646           "inline accessor methods (get/set)")                              \
 647                                                                             \
 648   diagnostic(bool, InlineConstructors, true,                                \
 649           "inline constructor methods")                                     \
 650                                                                             \
 651   product(intx, TypeProfileMajorReceiverPercent, 90,                        \
 652           "% of major receiver type to all profiled receivers")             \
 653           range(0, 100)                                                     \
 654                                                                             \
 655   diagnostic(bool, PrintIntrinsics, false,                                  \
 656           "prints attempted and successful inlining of intrinsics")         \
 657                                                                             \
 658   develop(bool, StressReflectiveCode, false,                                \
 659           "Use inexact types at allocations, etc., to test reflection")     \
 660                                                                             \
 661   diagnostic(bool, DebugInlinedCalls, true,                                 \
 662          "If false, restricts profiled locations to the root method only")  \
 663                                                                             \
 664   notproduct(bool, VerifyLoopOptimizations, false,                          \
 665           "verify major loop optimizations")                                \
 666                                                                             \
 667   diagnostic(bool, ProfileDynamicTypes, true,                               \
 668           "do extra type profiling and use it more aggressively")           \
 669                                                                             \
 670   develop(bool, TraceIterativeGVN, false,                                   \
 671           "Print progress during Iterative Global Value Numbering")         \
 672                                                                             \
 673   develop(bool, VerifyIterativeGVN, false,                                  \
 674           "Verify Def-Use modifications during sparse Iterative Global "    \
 675           "Value Numbering")                                                \
 676                                                                             \
 677   notproduct(bool, TraceCISCSpill, false,                                   \
 678           "Trace allocators use of cisc spillable instructions")            \
 679                                                                             \
 680   product(bool, SplitIfBlocks, true,                                        \
 681           "Clone compares and control flow through merge points to fold "   \
 682           "some branches")                                                  \
 683                                                                             \
 684   develop(intx, FreqCountInvocations,  1,                                   \
 685           "Scaling factor for branch frequencies (deprecated)")             \
 686           range(1, max_intx)                                                \
 687                                                                             \
 688   product(intx, AliasLevel,     3,                                          \
 689           "0 for no aliasing, 1 for oop/field/static/array split, "         \
 690           "2 for class split, 3 for unique instances")                      \
 691           range(0, 3)                                                       \
 692           constraint(AliasLevelConstraintFunc,AfterErgo)                    \
 693                                                                             \
 694   develop(bool, VerifyAliases, false,                                       \
 695           "perform extra checks on the results of alias analysis")          \
 696                                                                             \
 697   product(bool, IncrementalInline, true,                                    \
 698           "do post parse inlining")                                         \
 699                                                                             \
 700   develop(bool, AlwaysIncrementalInline, false,                             \
 701           "do all inlining incrementally")                                  \
 702                                                                             \
 703   product(intx, LiveNodeCountInliningCutoff, 40000,                         \
 704           "max number of live nodes in a method")                           \
 705           range(0, max_juint / 8)                                           \
 706                                                                             \
 707   diagnostic(bool, OptimizeExpensiveOps, true,                              \
 708           "Find best control for expensive operations")                     \
 709                                                                             \
 710   diagnostic(bool, UseMathExactIntrinsics, true,                            \
 711           "Enables intrinsification of various java.lang.Math functions")   \
 712                                                                             \
 713   diagnostic(bool, UseCharacterCompareIntrinsics, false,                    \
 714           "Enables intrinsification of java.lang.Character functions")      \
 715                                                                             \
 716   diagnostic(bool, UseMultiplyToLenIntrinsic, false,                        \
 717           "Enables intrinsification of BigInteger.multiplyToLen()")         \
 718                                                                             \
 719   diagnostic(bool, UseSquareToLenIntrinsic, false,                          \
 720           "Enables intrinsification of BigInteger.squareToLen()")           \
 721                                                                             \
 722   diagnostic(bool, UseMulAddIntrinsic, false,                               \
 723           "Enables intrinsification of BigInteger.mulAdd()")                \
 724                                                                             \
 725   diagnostic(bool, UseMontgomeryMultiplyIntrinsic, false,                   \
 726           "Enables intrinsification of BigInteger.montgomeryMultiply()")    \
 727                                                                             \
 728   diagnostic(bool, UseMontgomerySquareIntrinsic, false,                     \
 729           "Enables intrinsification of BigInteger.montgomerySquare()")      \
 730                                                                             \
 731   product(bool, UseTypeSpeculation, true,                                   \
 732           "Speculatively propagate types from profiles")                    \
 733                                                                             \
 734   diagnostic(bool, UseInlineDepthForSpeculativeTypes, true,                 \
 735           "Carry inline depth of profile point with speculative type "      \
 736           "and give priority to profiling from lower inline depth")         \
 737                                                                             \
 738   product_pd(bool, TrapBasedRangeChecks,                                    \
 739           "Generate code for range checks that uses a cmp and trap "        \
 740           "instruction raising SIGTRAP. Used on PPC64.")                    \
 741                                                                             \
 742   product(intx, ArrayCopyLoadStoreMaxElem, 8,                               \
 743           "Maximum number of arraycopy elements inlined as a sequence of"   \
 744           "loads/stores")                                                   \
 745           range(0, max_intx)                                                \
 746                                                                             \
 747   develop(bool, StressArrayCopyMacroNode, false,                            \
 748           "Perform ArrayCopy load/store replacement during IGVN only")      \
 749                                                                             \
 750   develop(bool, RenumberLiveNodes, true,                                    \
 751           "Renumber live nodes")                                            \
 752                                                                             \
 753   product(uintx, LoopStripMiningIter, 0,                                    \
 754           "Number of iterations in strip mined loop")                       \
 755           range(0, max_juint)                                               \
 756                                                                             \
 757   product(uintx, LoopStripMiningIterShortLoop, 0,                           \
 758           "Loop with fewer iterations are not strip mined")                 \
 759           range(0, max_juint)                                               \
 760                                                                             \
 761   product(bool, UseProfiledLoopPredicate, true,                             \
 762           "move predicates out of loops based on profiling data")           \
 763 
 764 C2_FLAGS(DECLARE_DEVELOPER_FLAG, \
 765          DECLARE_PD_DEVELOPER_FLAG, \
 766          DECLARE_PRODUCT_FLAG, \
 767          DECLARE_PD_PRODUCT_FLAG, \
 768          DECLARE_DIAGNOSTIC_FLAG, \
 769          DECLARE_PD_DIAGNOSTIC_FLAG, \
 770          DECLARE_EXPERIMENTAL_FLAG, \
 771          DECLARE_NOTPRODUCT_FLAG, \
 772          IGNORE_RANGE, \
 773          IGNORE_CONSTRAINT, \
 774          IGNORE_WRITEABLE)
 775 
 776 #endif // SHARE_OPTO_C2_GLOBALS_HPP