rev 8995 : 8046155: JEP165: Compiler Control
Summary:
Reviewed-by:

   1 /*
   2  * Copyright (c) 2000, 2015, 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, develop_pd, product, product_pd, diagnostic, experimental, notproduct, range, constraint) \
  65                                                                             \
  66   develop(bool, StressLCM, false,                                           \
  67           "Randomize instruction scheduling in LCM")                        \
  68                                                                             \
  69   develop(bool, StressGCM, false,                                           \
  70           "Randomize instruction scheduling in GCM")                        \
  71                                                                             \
  72   develop(intx, OptoPrologueNops, 0,                                        \
  73           "Insert this many extra nop instructions "                        \
  74           "in the prologue of every nmethod")                               \
  75                                                                             \
  76   product_pd(intx, InteriorEntryAlignment,                                  \
  77           "Code alignment for interior entry points "                       \
  78           "in generated code (in bytes)")                                   \
  79                                                                             \
  80   product(intx, MaxLoopPad, (OptoLoopAlignment-1),                          \
  81           "Align a loop if padding size in bytes is less or equal to this " \
  82           "value")                                                          \
  83                                                                             \
  84   product(intx, MaxVectorSize, 64,                                          \
  85           "Max vector size in bytes, "                                      \
  86           "actual size could be less depending on elements type")           \
  87                                                                             \
  88   product(bool, AlignVector, true,                                          \
  89           "Perform vector store/load alignment in loop")                    \
  90                                                                             \
  91   product(intx, NumberOfLoopInstrToAlign, 4,                                \
  92           "Number of first instructions in a loop to align")                \
  93                                                                             \
  94   notproduct(intx, IndexSetWatch, 0,                                        \
  95           "Trace all operations on this IndexSet (-1 means all, 0 none)")   \
  96           range(-1, 0)                                                      \
  97                                                                             \
  98   develop(intx, OptoNodeListSize, 4,                                        \
  99           "Starting allocation size of Node_List data structures")          \
 100                                                                             \
 101   develop(intx, OptoBlockListSize, 8,                                       \
 102           "Starting allocation size of Block_List data structures")         \
 103                                                                             \
 104   develop(intx, OptoPeepholeAt, -1,                                         \
 105           "Apply peephole optimizations to this peephole rule")             \
 106                                                                             \
 107   notproduct(bool, PrintIdeal, false,                                       \
 108           "Print ideal graph before code generation")                       \
 109                                                                             \
 110   notproduct(bool, PrintOpto, false,                                        \
 111           "Print compiler2 attempts")                                       \
 112                                                                             \
 113   notproduct(bool, PrintOptoInlining, false,                                \
 114           "Print compiler2 inlining decisions")                             \
 115                                                                             \
 116   notproduct(bool, VerifyOpto, false,                                       \
 117           "Apply more time consuming verification during compilation")      \
 118                                                                             \
 119   notproduct(bool, VerifyIdealNodeCount, false,                             \
 120           "Verify that tracked dead ideal node count is accurate")          \
 121                                                                             \
 122   notproduct(bool, PrintIdealNodeCount, false,                              \
 123           "Print liveness counts of ideal nodes")                           \
 124                                                                             \
 125   notproduct(bool, VerifyOptoOopOffsets, false,                             \
 126           "Check types of base addresses in field references")              \
 127                                                                             \
 128   develop(bool, IdealizedNumerics, false,                                   \
 129           "Check performance difference allowing FP "                       \
 130           "associativity and commutativity...")                             \
 131                                                                             \
 132   develop(bool, OptoBreakpoint, false,                                      \
 133           "insert breakpoint at method entry")                              \
 134                                                                             \
 135   notproduct(bool, OptoBreakpointOSR, false,                                \
 136           "insert breakpoint at osr method entry")                          \
 137                                                                             \
 138   notproduct(intx, BreakAtNode, 0,                                          \
 139           "Break at construction of this Node (either _idx or _debug_idx)") \
 140                                                                             \
 141   notproduct(bool, OptoBreakpointC2R, false,                                \
 142           "insert breakpoint at runtime stub entry")                        \
 143                                                                             \
 144   notproduct(bool, OptoNoExecute, false,                                    \
 145           "Attempt to parse and compile but do not execute generated code") \
 146                                                                             \
 147   notproduct(bool, PrintOptoStatistics, false,                              \
 148           "Print New compiler statistics")                                  \
 149                                                                             \
 150   diagnostic(bool, PrintOptoAssembly, false,                                \
 151           "Print New compiler assembly output")                             \
 152                                                                             \
 153   develop_pd(bool, OptoPeephole,                                            \
 154           "Apply peephole optimizations after register allocation")         \
 155                                                                             \
 156   develop(bool, OptoRemoveUseless, true,                                    \
 157           "Remove useless nodes after parsing")                             \
 158                                                                             \
 159   notproduct(bool, PrintFrameConverterAssembly, false,                      \
 160           "Print New compiler assembly output for frame converters")        \
 161                                                                             \
 162   notproduct(bool, PrintParseStatistics, false,                             \
 163           "Print nodes, transforms and new values made per bytecode parsed")\
 164                                                                             \
 165   notproduct(bool, PrintOptoPeephole, false,                                \
 166           "Print New compiler peephole replacements")                       \
 167                                                                             \
 168   develop(bool, PrintCFGBlockFreq, false,                                   \
 169           "Print CFG block freqencies")                                     \
 170                                                                             \
 171   develop(bool, TraceOptoParse, false,                                      \
 172           "Trace bytecode parse and control-flow merge")                    \
 173                                                                             \
 174   product_pd(intx,  LoopUnrollLimit,                                        \
 175           "Unroll loop bodies with node count less than this")              \
 176                                                                             \
 177   product(intx,  LoopMaxUnroll, 16,                                         \
 178           "Maximum number of unrolls for main loop")                        \
 179                                                                             \
 180   product(bool,  SuperWordLoopUnrollAnalysis, false,                        \
 181           "Map number of unrolls for main loop via "                        \
 182           "Superword Level Parallelism analysis")                           \
 183                                                                             \
 184   notproduct(bool, TraceSuperWordLoopUnrollAnalysis, false,                 \
 185           "Trace what Superword Level Parallelism analysis applies")        \
 186                                                                             \
 187   product(intx,  LoopUnrollMin, 4,                                          \
 188           "Minimum number of unroll loop bodies before checking progress"   \
 189           "of rounds of unroll,optimize,..")                                \
 190                                                                             \
 191   develop(intx, UnrollLimitForProfileCheck, 1,                              \
 192           "Don't use profile_trip_cnt() to restrict unrolling until "       \
 193           "unrolling would push the number of unrolled iterations above "   \
 194           "UnrollLimitForProfileCheck. A higher value allows more "         \
 195           "unrolling. Zero acts as a very large value." )                   \
 196                                                                             \
 197   product(intx, MultiArrayExpandLimit, 6,                                   \
 198           "Maximum number of individual allocations in an inline-expanded " \
 199           "multianewarray instruction")                                     \
 200                                                                             \
 201   notproduct(bool, TraceProfileTripCount, false,                            \
 202           "Trace profile loop trip count information")                      \
 203                                                                             \
 204   product(bool, UseLoopPredicate, true,                                     \
 205           "Generate a predicate to select fast/slow loop versions")         \
 206                                                                             \
 207   develop(bool, TraceLoopPredicate, false,                                  \
 208           "Trace generation of loop predicates")                            \
 209                                                                             \
 210   develop(bool, TraceLoopOpts, false,                                       \
 211           "Trace executed loop optimizations")                              \
 212                                                                             \
 213   diagnostic(bool, LoopLimitCheck, true,                                    \
 214           "Generate a loop limits check for overflow")                      \
 215                                                                             \
 216   develop(bool, TraceLoopLimitCheck, false,                                 \
 217           "Trace generation of loop limits checks")                         \
 218                                                                             \
 219   diagnostic(bool, RangeLimitCheck, true,                                   \
 220           "Additional overflow checks during range check elimination")      \
 221                                                                             \
 222   develop(bool, TraceRangeLimitCheck, false,                                \
 223           "Trace additional overflow checks in RCE")                        \
 224                                                                             \
 225   diagnostic(bool, UnrollLimitCheck, true,                                  \
 226           "Additional overflow checks during loop unroll")                  \
 227                                                                             \
 228   /* OptimizeFill not yet supported on PowerPC. */                          \
 229   product(bool, OptimizeFill, true PPC64_ONLY(&& false),                    \
 230           "convert fill/copy loops into intrinsic")                         \
 231                                                                             \
 232   develop(bool, TraceOptimizeFill, false,                                   \
 233           "print detailed information about fill conversion")               \
 234                                                                             \
 235   develop(bool, OptoCoalesce, true,                                         \
 236           "Use Conservative Copy Coalescing in the Register Allocator")     \
 237                                                                             \
 238   develop(bool, UseUniqueSubclasses, true,                                  \
 239           "Narrow an abstract reference to the unique concrete subclass")   \
 240                                                                             \
 241   develop(bool, UseExactTypes, true,                                        \
 242           "Use exact types to eliminate array store checks and v-calls")    \
 243                                                                             \
 244   product(intx, TrackedInitializationLimit, 50,                             \
 245           "When initializing fields, track up to this many words")          \
 246                                                                             \
 247   product(bool, ReduceFieldZeroing, true,                                   \
 248           "When initializing fields, try to avoid needless zeroing")        \
 249                                                                             \
 250   product(bool, ReduceInitialCardMarks, true,                               \
 251           "When initializing fields, try to avoid needless card marks")     \
 252                                                                             \
 253   product(bool, ReduceBulkZeroing, true,                                    \
 254           "When bulk-initializing, try to avoid needless zeroing")          \
 255                                                                             \
 256   product(bool, UseFPUForSpilling, false,                                   \
 257           "Spill integer registers to FPU instead of stack when possible")  \
 258                                                                             \
 259   develop_pd(intx, RegisterCostAreaRatio,                                   \
 260           "Spill selection in reg allocator: scale area by (X/64K) before " \
 261           "adding cost")                                                    \
 262                                                                             \
 263   develop_pd(bool, UseCISCSpill,                                            \
 264           "Use ADLC supplied cisc instructions during allocation")          \
 265                                                                             \
 266   notproduct(bool, VerifyGraphEdges , false,                                \
 267           "Verify Bi-directional Edges")                                    \
 268                                                                             \
 269   notproduct(bool, VerifyDUIterators, true,                                 \
 270           "Verify the safety of all iterations of Bi-directional Edges")    \
 271                                                                             \
 272   notproduct(bool, VerifyHashTableKeys, true,                               \
 273           "Verify the immutability of keys in the VN hash tables")          \
 274                                                                             \
 275   notproduct(bool, VerifyRegisterAllocator , false,                         \
 276           "Verify Register Allocator")                                      \
 277                                                                             \
 278   develop_pd(intx, FLOATPRESSURE,                                           \
 279           "Number of float LRG's that constitute high register pressure")   \
 280                                                                             \
 281   develop_pd(intx, INTPRESSURE,                                             \
 282           "Number of integer LRG's that constitute high register pressure") \
 283                                                                             \
 284   notproduct(bool, TraceOptoPipelining, false,                              \
 285           "Trace pipelining information")                                   \
 286                                                                             \
 287   notproduct(bool, TraceOptoOutput, false,                                  \
 288           "Trace pipelining information")                                   \
 289                                                                             \
 290   product_pd(bool, OptoScheduling,                                          \
 291           "Instruction Scheduling after register allocation")               \
 292                                                                             \
 293   product_pd(bool, OptoRegScheduling,                                       \
 294           "Instruction Scheduling before register allocation for pressure") \
 295                                                                             \
 296   product(bool, PartialPeelLoop, true,                                      \
 297           "Partial peel (rotate) loops")                                    \
 298                                                                             \
 299   product(intx, PartialPeelNewPhiDelta, 0,                                  \
 300           "Additional phis that can be created by partial peeling")         \
 301                                                                             \
 302   notproduct(bool, TracePartialPeeling, false,                              \
 303           "Trace partial peeling (loop rotation) information")              \
 304                                                                             \
 305   product(bool, PartialPeelAtUnsignedTests, true,                           \
 306           "Partial peel at unsigned tests if no signed test exists")        \
 307                                                                             \
 308   product(bool, ReassociateInvariants, true,                                \
 309           "Enable reassociation of expressions with loop invariants.")      \
 310                                                                             \
 311   product(bool, LoopUnswitching, true,                                      \
 312           "Enable loop unswitching (a form of invariant test hoisting)")    \
 313                                                                             \
 314   notproduct(bool, TraceLoopUnswitching, false,                             \
 315           "Trace loop unswitching")                                         \
 316                                                                             \
 317   product(bool, AllowVectorizeOnDemand, true,                               \
 318           "Globally supress vectorization set in VectorizeMethod")          \
 319                                                                             \
 320   product(bool, UseSuperWord, true,                                         \
 321           "Transform scalar operations into superword operations")          \
 322                                                                             \
 323   develop(bool, SuperWordRTDepCheck, false,                                 \
 324           "Enable runtime dependency checks.")                              \
 325                                                                             \
 326   product(bool, SuperWordReductions, true,                                  \
 327           "Enable reductions support in superword.")                        \
 328                                                                             \
 329   notproduct(bool, TraceSuperWord, false,                                   \
 330           "Trace superword transforms")                                     \
 331                                                                             \
 332   notproduct(bool, TraceNewVectors, false,                                  \
 333           "Trace creation of Vector nodes")                                 \
 334                                                                             \
 335   product_pd(bool, OptoBundling,                                            \
 336           "Generate nops to fill i-cache lines")                            \
 337                                                                             \
 338   product_pd(intx, ConditionalMoveLimit,                                    \
 339           "Limit of ops to make speculative when using CMOVE")              \
 340                                                                             \
 341   /* Set BranchOnRegister == false. See 4965987. */                         \
 342   product(bool, BranchOnRegister, false,                                    \
 343           "Use Sparc V9 branch-on-register opcodes")                        \
 344                                                                             \
 345   develop(bool, SparcV9RegsHiBitsZero, true,                                \
 346           "Assume Sparc V9 I&L registers on V8+ systems are zero-extended") \
 347                                                                             \
 348   product(bool, UseRDPCForConstantTableBase, false,                         \
 349           "Use Sparc RDPC instruction for the constant table base.")        \
 350                                                                             \
 351   develop(bool, PrintIdealGraph, false,                                     \
 352           "Print ideal graph to XML file / network interface. "             \
 353           "By default attempts to connect to the visualizer on a socket.")  \
 354                                                                             \
 355   develop(intx, PrintIdealGraphLevel, 0,                                    \
 356           "Level of detail of the ideal graph printout. "                   \
 357           "System-wide value, 0=nothing is printed, 3=all details printed. "\
 358           "Level of detail of printouts can be set on a per-method level "  \
 359           "as well by using CompileCommand=option.")                        \
 360           range(0, 3)                                                       \
 361                                                                             \
 362   develop(intx, PrintIdealGraphPort, 4444,                                  \
 363           "Ideal graph printer to network port")                            \
 364                                                                             \
 365   notproduct(ccstr, PrintIdealGraphAddress, "127.0.0.1",                    \
 366           "IP address to connect to visualizer")                            \
 367                                                                             \
 368   notproduct(ccstr, PrintIdealGraphFile, NULL,                              \
 369           "File to dump ideal graph to.  If set overrides the "             \
 370           "use of the network")                                             \
 371                                                                             \
 372   product(bool, UseBimorphicInlining, true,                                 \
 373           "Profiling based inlining for two receivers")                     \
 374                                                                             \
 375   product(bool, UseOnlyInlinedBimorphic, true,                              \
 376           "Don't use BimorphicInlining if can't inline a second method")    \
 377                                                                             \
 378   product(bool, InsertMemBarAfterArraycopy, true,                           \
 379           "Insert memory barrier after arraycopy call")                     \
 380                                                                             \
 381   develop(bool, SubsumeLoads, true,                                         \
 382           "Attempt to compile while subsuming loads into machine "          \
 383           "instructions.")                                                  \
 384                                                                             \
 385   develop(bool, StressRecompilation, false,                                 \
 386           "Recompile each compiled method without subsuming loads "         \
 387           "or escape analysis.")                                            \
 388                                                                             \
 389   develop(intx, ImplicitNullCheckThreshold, 3,                              \
 390           "Don't do implicit null checks if NPE's in a method exceeds "     \
 391           "limit")                                                          \
 392                                                                             \
 393   product(intx, LoopOptsCount, 43,                                          \
 394           "Set level of loop optimization for tier 1 compiles")             \
 395                                                                             \
 396   /* controls for heat-based inlining */                                    \
 397                                                                             \
 398   develop(intx, NodeCountInliningCutoff, 18000,                             \
 399           "If parser node generation exceeds limit stop inlining")          \
 400                                                                             \
 401   develop(intx, NodeCountInliningStep, 1000,                                \
 402           "Target size of warm calls inlined between optimization passes")  \
 403                                                                             \
 404   develop(bool, InlineWarmCalls, false,                                     \
 405           "Use a heat-based priority queue to govern inlining")             \
 406                                                                             \
 407   develop(intx, HotCallCountThreshold, 999999,                              \
 408           "large numbers of calls (per method invocation) force hotness")   \
 409                                                                             \
 410   develop(intx, HotCallProfitThreshold, 999999,                             \
 411           "highly profitable inlining opportunities force hotness")         \
 412                                                                             \
 413   develop(intx, HotCallTrivialWork, -1,                                     \
 414           "trivial execution time (no larger than this) forces hotness")    \
 415                                                                             \
 416   develop(intx, HotCallTrivialSize, -1,                                     \
 417           "trivial methods (no larger than this) force calls to be hot")    \
 418                                                                             \
 419   develop(intx, WarmCallMinCount, -1,                                       \
 420           "number of calls (per method invocation) to enable inlining")     \
 421                                                                             \
 422   develop(intx, WarmCallMinProfit, -1,                                      \
 423           "number of calls (per method invocation) to enable inlining")     \
 424                                                                             \
 425   develop(intx, WarmCallMaxWork, 999999,                                    \
 426           "execution time of the largest inlinable method")                 \
 427                                                                             \
 428   develop(intx, WarmCallMaxSize, 999999,                                    \
 429           "size of the largest inlinable method")                           \
 430                                                                             \
 431   product(intx, MaxNodeLimit, 80000,                                        \
 432           "Maximum number of nodes")                                        \
 433                                                                             \
 434   product(intx, NodeLimitFudgeFactor, 2000,                                 \
 435           "Fudge Factor for certain optimizations")                         \
 436                                                                             \
 437   product(bool, UseJumpTables, true,                                        \
 438           "Use JumpTables instead of a binary search tree for switches")    \
 439                                                                             \
 440   product(bool, UseDivMod, true,                                            \
 441           "Use combined DivMod instruction if available")                   \
 442                                                                             \
 443   product_pd(intx, MinJumpTableSize,                                        \
 444           "Minimum number of targets in a generated jump table")            \
 445                                                                             \
 446   product(intx, MaxJumpTableSize, 65000,                                    \
 447           "Maximum number of targets in a generated jump table")            \
 448                                                                             \
 449   product(intx, MaxJumpTableSparseness, 5,                                  \
 450           "Maximum sparseness for jumptables")                              \
 451                                                                             \
 452   product(bool, EliminateLocks, true,                                       \
 453           "Coarsen locks when possible")                                    \
 454                                                                             \
 455   product(bool, EliminateNestedLocks, true,                                 \
 456           "Eliminate nested locks of the same object when possible")        \
 457                                                                             \
 458   notproduct(bool, PrintLockStatistics, false,                              \
 459           "Print precise statistics on the dynamic lock usage")             \
 460                                                                             \
 461   diagnostic(bool, PrintPreciseBiasedLockingStatistics, false,              \
 462           "Print per-lock-site statistics of biased locking in JVM")        \
 463                                                                             \
 464   diagnostic(bool, PrintPreciseRTMLockingStatistics, false,                 \
 465           "Print per-lock-site statistics of rtm locking in JVM")           \
 466                                                                             \
 467   notproduct(bool, PrintEliminateLocks, false,                              \
 468           "Print out when locks are eliminated")                            \
 469                                                                             \
 470   product(bool, EliminateAutoBox, true,                                     \
 471           "Control optimizations for autobox elimination")                  \
 472                                                                             \
 473   diagnostic(bool, UseImplicitStableValues, true,                           \
 474           "Mark well-known stable fields as such (e.g. String.value)")      \
 475                                                                             \
 476   product(intx, AutoBoxCacheMax, 128,                                       \
 477           "Sets max value cached by the java.lang.Integer autobox cache")   \
 478                                                                             \
 479   experimental(bool, AggressiveUnboxing, false,                             \
 480           "Control optimizations for aggressive boxing elimination")        \
 481                                                                             \
 482   develop(bool, TracePostallocExpand, false, "Trace expanding nodes after"  \
 483           " register allocation.")                                          \
 484                                                                             \
 485   product(bool, DoEscapeAnalysis, true,                                     \
 486           "Perform escape analysis")                                        \
 487                                                                             \
 488   product(double, EscapeAnalysisTimeout, 20. DEBUG_ONLY(+40.),              \
 489           "Abort EA when it reaches time limit (in sec)")                   \
 490                                                                             \
 491   develop(bool, ExitEscapeAnalysisOnTimeout, true,                          \
 492           "Exit or throw assert in EA when it reaches time limit")          \
 493                                                                             \
 494   notproduct(bool, PrintEscapeAnalysis, false,                              \
 495           "Print the results of escape analysis")                           \
 496                                                                             \
 497   product(bool, EliminateAllocations, true,                                 \
 498           "Use escape analysis to eliminate allocations")                   \
 499                                                                             \
 500   notproduct(bool, PrintEliminateAllocations, false,                        \
 501           "Print out when allocations are eliminated")                      \
 502                                                                             \
 503   product(intx, EliminateAllocationArraySizeLimit, 64,                      \
 504           "Array size (number of elements) limit for scalar replacement")   \
 505                                                                             \
 506   product(bool, OptimizePtrCompare, true,                                   \
 507           "Use escape analysis to optimize pointers compare")               \
 508                                                                             \
 509   notproduct(bool, PrintOptimizePtrCompare, false,                          \
 510           "Print information about optimized pointers compare")             \
 511                                                                             \
 512   notproduct(bool, VerifyConnectionGraph , true,                            \
 513           "Verify Connection Graph construction in Escape Analysis")        \
 514                                                                             \
 515   product(bool, UseOptoBiasInlining, true,                                  \
 516           "Generate biased locking code in C2 ideal graph")                 \
 517                                                                             \
 518   product(bool, OptimizeStringConcat, true,                                 \
 519           "Optimize the construction of Strings by StringBuilder")          \
 520                                                                             \
 521   notproduct(bool, PrintOptimizeStringConcat, false,                        \
 522           "Print information about transformations performed on Strings")   \
 523                                                                             \
 524   product(intx, ValueSearchLimit, 1000,                                     \
 525           "Recursion limit in PhaseMacroExpand::value_from_mem_phi")        \
 526                                                                             \
 527   product(intx, MaxLabelRootDepth, 1100,                                    \
 528           "Maximum times call Label_Root to prevent stack overflow")        \
 529                                                                             \
 530   diagnostic(intx, DominatorSearchLimit, 1000,                              \
 531           "Iterations limit in Node::dominates")                            \
 532                                                                             \
 533   product(bool, BlockLayoutByFrequency, true,                               \
 534           "Use edge frequencies to drive block ordering")                   \
 535                                                                             \
 536   product(intx, BlockLayoutMinDiamondPercentage, 20,                        \
 537           "Miniumum %% of a successor (predecessor) for which block "       \
 538           "layout a will allow a fork (join) in a single chain")            \
 539           range(0, 100)                                                     \
 540                                                                             \
 541   product(bool, BlockLayoutRotateLoops, true,                               \
 542           "Allow back branches to be fall throughs in the block layour")    \
 543                                                                             \
 544   develop(bool, InlineReflectionGetCallerClass, true,                       \
 545           "inline sun.reflect.Reflection.getCallerClass(), known to be "    \
 546           "part of base library DLL")                                       \
 547                                                                             \
 548   develop(bool, InlineObjectCopy, true,                                     \
 549           "inline Object.clone and Arrays.copyOf[Range] intrinsics")        \
 550                                                                             \
 551   develop(bool, SpecialStringCompareTo, true,                               \
 552           "special version of string compareTo")                            \
 553                                                                             \
 554   develop(bool, SpecialStringIndexOf, true,                                 \
 555           "special version of string indexOf")                              \
 556                                                                             \
 557   develop(bool, SpecialStringEquals, true,                                  \
 558           "special version of string equals")                               \
 559                                                                             \
 560   develop(bool, SpecialArraysEquals, true,                                  \
 561           "special version of Arrays.equals(char[],char[])")                \
 562                                                                             \
 563   product(bool, SpecialEncodeISOArray, true,                                \
 564           "special version of ISO_8859_1$Encoder.encodeISOArray")           \
 565                                                                             \
 566   develop(bool, BailoutToInterpreterForThrows, false,                       \
 567           "Compiled methods which throws/catches exceptions will be "       \
 568           "deopt and intp.")                                                \
 569                                                                             \
 570   develop(bool, ConvertCmpD2CmpF, true,                                     \
 571           "Convert cmpD to cmpF when one input is constant in float range") \
 572                                                                             \
 573   develop(bool, ConvertFloat2IntClipping, true,                             \
 574           "Convert float2int clipping idiom to integer clipping")           \
 575                                                                             \
 576   develop(bool, Use24BitFPMode, true,                                       \
 577           "Set 24-bit FPU mode on a per-compile basis ")                    \
 578                                                                             \
 579   develop(bool, Use24BitFP, true,                                           \
 580           "use FP instructions that produce 24-bit precise results")        \
 581                                                                             \
 582   develop(bool, MonomorphicArrayCheck, true,                                \
 583           "Uncommon-trap array store checks that require full type check")  \
 584                                                                             \
 585   notproduct(bool, TracePhaseCCP, false,                                    \
 586           "Print progress during Conditional Constant Propagation")         \
 587                                                                             \
 588   develop(bool, PrintDominators, false,                                     \
 589           "Print out dominator trees for GVN")                              \
 590                                                                             \
 591   diagnostic(bool, TraceSpilling, false,                                    \
 592           "Trace spilling")                                                 \
 593                                                                             \
 594   diagnostic(bool, TraceTypeProfile, false,                                 \
 595           "Trace type profile")                                             \
 596                                                                             \
 597   develop(bool, PoisonOSREntry, true,                                       \
 598            "Detect abnormal calls to OSR code")                             \
 599                                                                             \
 600   develop(bool, SoftMatchFailure, trueInProduct,                            \
 601           "If the DFA fails to match a node, print a message and bail out") \
 602                                                                             \
 603   develop(bool, InlineAccessors, true,                                      \
 604           "inline accessor methods (get/set)")                              \
 605                                                                             \
 606   product(intx, TypeProfileMajorReceiverPercent, 90,                        \
 607           "% of major receiver type to all profiled receivers")             \
 608           range(0, 100)                                                     \
 609                                                                             \
 610   diagnostic(bool, PrintIntrinsics, false,                                  \
 611           "prints attempted and successful inlining of intrinsics")         \
 612                                                                             \
 613   develop(bool, StressReflectiveCode, false,                                \
 614           "Use inexact types at allocations, etc., to test reflection")     \
 615                                                                             \
 616   diagnostic(bool, DebugInlinedCalls, true,                                 \
 617          "If false, restricts profiled locations to the root method only")  \
 618                                                                             \
 619   notproduct(bool, VerifyLoopOptimizations, false,                          \
 620           "verify major loop optimizations")                                \
 621                                                                             \
 622   diagnostic(bool, ProfileDynamicTypes, true,                               \
 623           "do extra type profiling and use it more aggressively")           \
 624                                                                             \
 625   develop(bool, TraceIterativeGVN, false,                                   \
 626           "Print progress during Iterative Global Value Numbering")         \
 627                                                                             \
 628   develop(bool, VerifyIterativeGVN, false,                                  \
 629           "Verify Def-Use modifications during sparse Iterative Global "    \
 630           "Value Numbering")                                                \
 631                                                                             \
 632   notproduct(bool, TraceCISCSpill, false,                                   \
 633           "Trace allocators use of cisc spillable instructions")            \
 634                                                                             \
 635   product(bool, SplitIfBlocks, true,                                        \
 636           "Clone compares and control flow through merge points to fold "   \
 637           "some branches")                                                  \
 638                                                                             \
 639   develop(intx, FreqCountInvocations,  1,                                   \
 640           "Scaling factor for branch frequencies (deprecated)")             \
 641                                                                             \
 642   product(intx, AliasLevel,     3,                                          \
 643           "0 for no aliasing, 1 for oop/field/static/array split, "         \
 644           "2 for class split, 3 for unique instances")                      \
 645           range(0, 3)                                                       \
 646           constraint(AliasLevelConstraintFunc,AfterErgo)                    \
 647                                                                             \
 648   develop(bool, VerifyAliases, false,                                       \
 649           "perform extra checks on the results of alias analysis")          \
 650                                                                             \
 651   product(bool, IncrementalInline, true,                                    \
 652           "do post parse inlining")                                         \
 653                                                                             \
 654   develop(bool, AlwaysIncrementalInline, false,                             \
 655           "do all inlining incrementally")                                  \
 656                                                                             \
 657   product(intx, LiveNodeCountInliningCutoff, 40000,                         \
 658           "max number of live nodes in a method")                           \
 659                                                                             \
 660   diagnostic(bool, OptimizeExpensiveOps, true,                              \
 661           "Find best control for expensive operations")                     \
 662                                                                             \
 663   product(bool, UseMathExactIntrinsics, true,                               \
 664           "Enables intrinsification of various java.lang.Math functions")   \
 665                                                                             \
 666   product(bool, UseMultiplyToLenIntrinsic, false,                           \
 667           "Enables intrinsification of BigInteger.multiplyToLen()")         \
 668                                                                             \
 669   product(bool, UseSquareToLenIntrinsic, false,                             \
 670           "Enables intrinsification of BigInteger.squareToLen()")           \
 671                                                                             \
 672   product(bool, UseMulAddIntrinsic, false,                                  \
 673           "Enables intrinsification of BigInteger.mulAdd()")                \
 674                                                                             \
 675   product(bool, UseMontgomeryMultiplyIntrinsic, false,                      \
 676           "Enables intrinsification of BigInteger.montgomeryMultiply()")    \
 677                                                                             \
 678   product(bool, UseMontgomerySquareIntrinsic, false,                        \
 679           "Enables intrinsification of BigInteger.montgomerySquare()")      \
 680                                                                             \
 681   product(bool, UseTypeSpeculation, true,                                   \
 682           "Speculatively propagate types from profiles")                    \
 683                                                                             \
 684   diagnostic(bool, UseInlineDepthForSpeculativeTypes, true,                 \
 685           "Carry inline depth of profile point with speculative type "      \
 686           "and give priority to profiling from lower inline depth")         \
 687                                                                             \
 688   product_pd(bool, TrapBasedRangeChecks,                                    \
 689           "Generate code for range checks that uses a cmp and trap "        \
 690           "instruction raising SIGTRAP. Used on PPC64.")                    \
 691                                                                             \
 692   product(intx, ArrayCopyLoadStoreMaxElem, 8,                               \
 693           "Maximum number of arraycopy elements inlined as a sequence of"   \
 694           "loads/stores")                                                   \
 695                                                                             \
 696   develop(bool, StressArrayCopyMacroNode, false,                            \
 697           "Perform ArrayCopy load/store replacement during IGVN only")
 698 
 699 C2_FLAGS(DECLARE_DEVELOPER_FLAG, \
 700          DECLARE_PD_DEVELOPER_FLAG, \
 701          DECLARE_PRODUCT_FLAG, \
 702          DECLARE_PD_PRODUCT_FLAG, \
 703          DECLARE_DIAGNOSTIC_FLAG, \
 704          DECLARE_EXPERIMENTAL_FLAG, \
 705          DECLARE_NOTPRODUCT_FLAG, \
 706          IGNORE_RANGE, \
 707          IGNORE_CONSTRAINT)
 708 
 709 #endif // SHARE_VM_OPTO_C2_GLOBALS_HPP
--- EOF ---