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