1 /*
   2  * Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_OPTO_C2_GLOBALS_HPP
  26 #define SHARE_OPTO_C2_GLOBALS_HPP
  27 
  28 #include "runtime/flags/jvmFlagConstraintsCompiler.hpp"
  29 #include "runtime/globals_shared.hpp"
  30 #include "utilities/macros.hpp"
  31 
  32 #include CPU_HEADER(c2_globals)
  33 #include OS_HEADER(c2_globals)
  34 
  35 extern "C" intx OptoLoopAlignment; // declared in globals.hpp
  36 
  37 //
  38 // Declare all globals flags used by the server compiler.
  39 //
  40 
  41 #include "utilities/macros.hpp"
  42 #if COMPILER2
  43 #include "runtime/flags/jvmFlag.hpp"
  44 PRODUCT_FLAG(bool,     StressLCM, false, JVMFlag::DIAGNOSTIC,
  45                        "Randomize instruction scheduling in LCM");
  46 
  47 PRODUCT_FLAG(bool,     StressGCM, false, JVMFlag::DIAGNOSTIC,
  48                        "Randomize instruction scheduling in GCM");
  49 
  50 DEVELOP_FLAG(bool,     StressMethodHandleLinkerInlining, false, JVMFlag::DEFAULT,
  51                        "Stress inlining through method handle linkers");
  52 
  53 DEVELOP_FLAG(intx,     OptoPrologueNops, 0, JVMFlag::RANGE,
  54                        "Insert this many extra nop instructions "
  55                        "in the prologue of every nmethod");
  56    FLAG_RANGE(         OptoPrologueNops, 0, 128);
  57 
  58 PRODUCT_FLAG_PD(intx,  InteriorEntryAlignment, JVMFlag::CONSTRAINT,
  59                        "Code alignment for interior entry points "
  60                        "in generated code (in bytes)");
  61    FLAG_CONSTRAINT(    InteriorEntryAlignment, (void*)InteriorEntryAlignmentConstraintFunc, JVMFlag::AfterErgo);
  62 
  63 PRODUCT_FLAG(intx,     MaxLoopPad, (OptoLoopAlignment-1), JVMFlag::RANGE,
  64                        "Align a loop if padding size in bytes is less or equal to this "
  65                        "value");
  66    FLAG_RANGE(         MaxLoopPad, 0, max_jint);
  67 
  68 PRODUCT_FLAG(intx,     MaxVectorSize, 64, JVMFlag::RANGE,
  69                        "Max vector size in bytes, "
  70                        "actual size could be less depending on elements type");
  71    FLAG_RANGE(         MaxVectorSize, 0, max_jint);
  72 
  73 PRODUCT_FLAG(bool,     AlignVector, true, JVMFlag::DEFAULT,
  74                        "Perform vector store/load alignment in loop");
  75 
  76 PRODUCT_FLAG(intx,     NumberOfLoopInstrToAlign, 4, JVMFlag::RANGE,
  77                        "Number of first instructions in a loop to align");
  78    FLAG_RANGE(         NumberOfLoopInstrToAlign, 0, max_jint);
  79 
  80 NOTPROD_FLAG(intx,     IndexSetWatch, 0, JVMFlag::RANGE,
  81                        "Trace all operations on this IndexSet (-1 means all, 0 none)");
  82    FLAG_RANGE(         IndexSetWatch, -1, 0);
  83 
  84 DEVELOP_FLAG(intx,     OptoNodeListSize, 4, JVMFlag::RANGE,
  85                        "Starting allocation size of Node_List data structures");
  86    FLAG_RANGE(         OptoNodeListSize, 0, max_jint);
  87 
  88 DEVELOP_FLAG(intx,     OptoBlockListSize, 8, JVMFlag::RANGE,
  89                        "Starting allocation size of Block_List data structures");
  90    FLAG_RANGE(         OptoBlockListSize, 0, max_jint);
  91 
  92 DEVELOP_FLAG(intx,     OptoPeepholeAt, -1, JVMFlag::DEFAULT,
  93                        "Apply peephole optimizations to this peephole rule");
  94 
  95 NOTPROD_FLAG(bool,     PrintIdeal, false, JVMFlag::DEFAULT,
  96                        "Print ideal graph before code generation");
  97 
  98 DEVELOP_FLAG(bool,     PrintOpto, false, JVMFlag::DEFAULT,
  99                        "Print compiler2 attempts");
 100 
 101 DEVELOP_FLAG(bool,     PrintOptoInlining, false, JVMFlag::DEFAULT,
 102                        "Print compiler2 inlining decisions");
 103 
 104 NOTPROD_FLAG(bool,     VerifyIdealNodeCount, false, JVMFlag::DEFAULT,
 105                        "Verify that tracked dead ideal node count is accurate");
 106 
 107 NOTPROD_FLAG(bool,     PrintIdealNodeCount, false, JVMFlag::DEFAULT,
 108                        "Print liveness counts of ideal nodes");
 109 
 110 NOTPROD_FLAG(bool,     VerifyOptoOopOffsets, false, JVMFlag::DEFAULT,
 111                        "Check types of base addresses in field references");
 112 
 113 DEVELOP_FLAG(bool,     IdealizedNumerics, false, JVMFlag::DEFAULT,
 114                        "Check performance difference allowing FP "
 115                        "associativity and commutativity...");
 116 
 117 PRODUCT_FLAG_PD(bool,  IdealizeClearArrayNode, JVMFlag::DIAGNOSTIC,
 118                        "Replace ClearArrayNode by subgraph of basic operations.");
 119 
 120 DEVELOP_FLAG(bool,     OptoBreakpoint, false, JVMFlag::DEFAULT,
 121                        "insert breakpoint at method entry");
 122 
 123 DEVELOP_FLAG(bool,     OptoBreakpointOSR, false, JVMFlag::DEFAULT,
 124                        "insert breakpoint at osr method entry");
 125 
 126 NOTPROD_FLAG(intx,     BreakAtNode, 0, JVMFlag::DEFAULT,
 127                        "Break at construction of this Node (either _idx or _debug_idx)");
 128 
 129 DEVELOP_FLAG(bool,     OptoBreakpointC2R, false, JVMFlag::DEFAULT,
 130                        "insert breakpoint at runtime stub entry");
 131 
 132 NOTPROD_FLAG(bool,     OptoNoExecute, false, JVMFlag::DEFAULT,
 133                        "Attempt to parse and compile but do not execute generated code");
 134 
 135 NOTPROD_FLAG(bool,     PrintOptoStatistics, false, JVMFlag::DEFAULT,
 136                        "Print New compiler statistics");
 137 
 138 PRODUCT_FLAG(bool,     PrintOptoAssembly, false, JVMFlag::DIAGNOSTIC,
 139                        "Print New compiler assembly output");
 140 
 141 DEVELOP_FLAG_PD(bool,  OptoPeephole, JVMFlag::DEFAULT,
 142                        "Apply peephole optimizations after register allocation");
 143 
 144 DEVELOP_FLAG(bool,     OptoRemoveUseless, true, JVMFlag::DEFAULT,
 145                        "Remove useless nodes after parsing");
 146 
 147 NOTPROD_FLAG(bool,     PrintFrameConverterAssembly, false, JVMFlag::DEFAULT,
 148                        "Print New compiler assembly output for frame converters");
 149 
 150 NOTPROD_FLAG(bool,     PrintParseStatistics, false, JVMFlag::DEFAULT,
 151                        "Print nodes, transforms and new values made per bytecode parsed");
 152 
 153 NOTPROD_FLAG(bool,     PrintOptoPeephole, false, JVMFlag::DEFAULT,
 154                        "Print New compiler peephole replacements");
 155 
 156 DEVELOP_FLAG(bool,     PrintCFGBlockFreq, false, JVMFlag::DEFAULT,
 157                        "Print CFG block freqencies");
 158 
 159 DEVELOP_FLAG(bool,     TraceOptoParse, false, JVMFlag::DEFAULT,
 160                        "Trace bytecode parse and control-flow merge");
 161 
 162 PRODUCT_FLAG_PD(intx,  LoopUnrollLimit, JVMFlag::RANGE,
 163                        "Unroll loop bodies with node count less than this");
 164    FLAG_RANGE(         LoopUnrollLimit, 0, max_jint / 4);
 165 
 166 PRODUCT_FLAG_PD(intx,  LoopPercentProfileLimit, JVMFlag::RANGE,
 167                        "Unroll loop bodies with % node count of profile limit");
 168    FLAG_RANGE(         LoopPercentProfileLimit, 10, 100);
 169 
 170 PRODUCT_FLAG(intx,     LoopMaxUnroll, 16, JVMFlag::RANGE,
 171                        "Maximum number of unrolls for main loop");
 172    FLAG_RANGE(         LoopMaxUnroll, 0, max_jint);
 173 
 174 PRODUCT_FLAG_PD(bool,  SuperWordLoopUnrollAnalysis, JVMFlag::DEFAULT,
 175                        "Map number of unrolls for main loop via "
 176                        "Superword Level Parallelism analysis");
 177 
 178 PRODUCT_FLAG(bool,     PostLoopMultiversioning, false, JVMFlag::EXPERIMENTAL,
 179                        "Multi versioned post loops to eliminate range checks");
 180 
 181 DEVELOP_FLAG(bool,     TraceSuperWordLoopUnrollAnalysis, false, JVMFlag::DEFAULT,
 182                        "Trace what Superword Level Parallelism analysis applies");
 183 
 184 PRODUCT_FLAG(bool,     UseVectorMacroLogic, true, JVMFlag::DIAGNOSTIC,
 185                        "Use ternary macro logic instructions");
 186 
 187 PRODUCT_FLAG(intx,     LoopUnrollMin, 4, JVMFlag::RANGE,
 188                        "Minimum number of unroll loop bodies before checking progress"
 189                        "of rounds of unroll,optimize,..");
 190    FLAG_RANGE(         LoopUnrollMin, 0, max_jint);
 191 
 192 PRODUCT_FLAG(bool,     UseSubwordForMaxVector, true, JVMFlag::DEFAULT,
 193                        "Use Subword Analysis to set maximum vector size");
 194 
 195 PRODUCT_FLAG(bool,     UseVectorCmov, false, JVMFlag::DEFAULT,
 196                        "Use Vectorized Cmov");
 197 
 198 DEVELOP_FLAG(intx,     UnrollLimitForProfileCheck, 1, JVMFlag::RANGE,
 199                        "Don't use profile_trip_cnt() to restrict unrolling until "
 200                        "unrolling would push the number of unrolled iterations above "
 201                        "UnrollLimitForProfileCheck. A higher value allows more "
 202                        "unrolling. Zero acts as a very large value.");
 203    FLAG_RANGE(         UnrollLimitForProfileCheck, 0, max_intx);
 204 
 205 PRODUCT_FLAG(intx,     MultiArrayExpandLimit, 6, JVMFlag::RANGE,
 206                        "Maximum number of individual allocations in an inline-expanded "
 207                        "multianewarray instruction");
 208    FLAG_RANGE(         MultiArrayExpandLimit, 0, max_jint);
 209 
 210 NOTPROD_FLAG(bool,     TraceProfileTripCount, false, JVMFlag::DEFAULT,
 211                        "Trace profile loop trip count information");
 212 
 213 PRODUCT_FLAG(bool,     UseCountedLoopSafepoints, false, JVMFlag::DEFAULT,
 214                        "Force counted loops to keep a safepoint");
 215 
 216 PRODUCT_FLAG(bool,     UseLoopPredicate, true, JVMFlag::DEFAULT,
 217                        "Generate a predicate to select fast/slow loop versions");
 218 
 219 DEVELOP_FLAG(bool,     TraceLoopPredicate, false, JVMFlag::DEFAULT,
 220                        "Trace generation of loop predicates");
 221 
 222 DEVELOP_FLAG(bool,     TraceLoopOpts, false, JVMFlag::DEFAULT,
 223                        "Trace executed loop optimizations");
 224 
 225 DEVELOP_FLAG(bool,     TraceLoopLimitCheck, false, JVMFlag::DEFAULT,
 226                        "Trace generation of loop limits checks");
 227 
 228 DEVELOP_FLAG(bool,     TraceRangeLimitCheck, false, JVMFlag::DEFAULT,
 229                        "Trace additional overflow checks in RCE");
 230 
 231 
 232     //  OptimizeFill not yet supported on PowerPC. 
 233 PRODUCT_FLAG(bool,     OptimizeFill, true PPC64_ONLY(&& false), JVMFlag::DEFAULT,
 234                        "convert fill/copy loops into intrinsic");
 235 
 236 DEVELOP_FLAG(bool,     TraceOptimizeFill, false, JVMFlag::DEFAULT,
 237                        "print detailed information about fill conversion");
 238 
 239 DEVELOP_FLAG(bool,     OptoCoalesce, true, JVMFlag::DEFAULT,
 240                        "Use Conservative Copy Coalescing in the Register Allocator");
 241 
 242 DEVELOP_FLAG(bool,     UseUniqueSubclasses, true, JVMFlag::DEFAULT,
 243                        "Narrow an abstract reference to the unique concrete subclass");
 244 
 245 DEVELOP_FLAG(bool,     UseExactTypes, true, JVMFlag::DEFAULT,
 246                        "Use exact types to eliminate array store checks and v-calls");
 247 
 248 PRODUCT_FLAG(intx,     TrackedInitializationLimit, 50, JVMFlag::RANGE,
 249                        "When initializing fields, track up to this many words");
 250    FLAG_RANGE(         TrackedInitializationLimit, 0, 65535);
 251 
 252 PRODUCT_FLAG(bool,     ReduceFieldZeroing, true, JVMFlag::DEFAULT,
 253                        "When initializing fields, try to avoid needless zeroing");
 254 
 255 PRODUCT_FLAG(bool,     ReduceInitialCardMarks, true, JVMFlag::DEFAULT,
 256                        "When initializing fields, try to avoid needless card marks");
 257 
 258 PRODUCT_FLAG(bool,     ReduceBulkZeroing, true, JVMFlag::DEFAULT,
 259                        "When bulk-initializing, try to avoid needless zeroing");
 260 
 261 PRODUCT_FLAG(bool,     UseFPUForSpilling, false, JVMFlag::DEFAULT,
 262                        "Spill integer registers to FPU instead of stack when possible");
 263 
 264 DEVELOP_FLAG_PD(intx,  RegisterCostAreaRatio, JVMFlag::DEFAULT,
 265                        "Spill selection in reg allocator: scale area by (X/64K) before "
 266                        "adding cost");
 267 
 268 DEVELOP_FLAG_PD(bool,  UseCISCSpill, JVMFlag::DEFAULT,
 269                        "Use ADLC supplied cisc instructions during allocation");
 270 
 271 NOTPROD_FLAG(bool,     VerifyGraphEdges, false, JVMFlag::DEFAULT,
 272                        "Verify Bi-directional Edges");
 273 
 274 NOTPROD_FLAG(bool,     VerifyDUIterators, true, JVMFlag::DEFAULT,
 275                        "Verify the safety of all iterations of Bi-directional Edges");
 276 
 277 NOTPROD_FLAG(bool,     VerifyHashTableKeys, true, JVMFlag::DEFAULT,
 278                        "Verify the immutability of keys in the VN hash tables");
 279 
 280 NOTPROD_FLAG(bool,     VerifyRegisterAllocator, false, JVMFlag::DEFAULT,
 281                        "Verify Register Allocator");
 282 
 283 DEVELOP_FLAG_PD(intx,  FLOATPRESSURE, JVMFlag::RANGE,
 284                        "Number of float LRG's that constitute high register pressure");
 285    FLAG_RANGE(         FLOATPRESSURE, 0, max_jint);
 286 
 287 DEVELOP_FLAG_PD(intx,  INTPRESSURE, JVMFlag::RANGE,
 288                        "Number of integer LRG's that constitute high register pressure");
 289    FLAG_RANGE(         INTPRESSURE, 0, max_jint);
 290 
 291 NOTPROD_FLAG(bool,     TraceOptoPipelining, false, JVMFlag::DEFAULT,
 292                        "Trace pipelining information");
 293 
 294 NOTPROD_FLAG(bool,     TraceOptoOutput, false, JVMFlag::DEFAULT,
 295                        "Trace pipelining information");
 296 
 297 PRODUCT_FLAG_PD(bool,  OptoScheduling, JVMFlag::DEFAULT,
 298                        "Instruction Scheduling after register allocation");
 299 
 300 PRODUCT_FLAG_PD(bool,  OptoRegScheduling, JVMFlag::DEFAULT,
 301                        "Instruction Scheduling before register allocation for pressure");
 302 
 303 PRODUCT_FLAG(bool,     PartialPeelLoop, true, JVMFlag::DEFAULT,
 304                        "Partial peel (rotate) loops");
 305 
 306 PRODUCT_FLAG(intx,     PartialPeelNewPhiDelta, 0, JVMFlag::RANGE,
 307                        "Additional phis that can be created by partial peeling");
 308    FLAG_RANGE(         PartialPeelNewPhiDelta, 0, max_jint);
 309 
 310 NOTPROD_FLAG(bool,     TracePartialPeeling, false, JVMFlag::DEFAULT,
 311                        "Trace partial peeling (loop rotation) information");
 312 
 313 PRODUCT_FLAG(bool,     PartialPeelAtUnsignedTests, true, JVMFlag::DEFAULT,
 314                        "Partial peel at unsigned tests if no signed test exists");
 315 
 316 PRODUCT_FLAG(bool,     ReassociateInvariants, true, JVMFlag::DEFAULT,
 317                        "Enable reassociation of expressions with loop invariants.");
 318 
 319 PRODUCT_FLAG(bool,     LoopUnswitching, true, JVMFlag::DEFAULT,
 320                        "Enable loop unswitching (a form of invariant test hoisting)");
 321 
 322 NOTPROD_FLAG(bool,     TraceLoopUnswitching, false, JVMFlag::DEFAULT,
 323                        "Trace loop unswitching");
 324 
 325 PRODUCT_FLAG(bool,     AllowVectorizeOnDemand, true, JVMFlag::DEFAULT,
 326                        "Globally supress vectorization set in VectorizeMethod");
 327 
 328 PRODUCT_FLAG(bool,     UseSuperWord, true, JVMFlag::DEFAULT,
 329                        "Transform scalar operations into superword operations");
 330 
 331 DEVELOP_FLAG(bool,     SuperWordRTDepCheck, false, JVMFlag::DEFAULT,
 332                        "Enable runtime dependency checks.");
 333 
 334 PRODUCT_FLAG(bool,     SuperWordReductions, true, JVMFlag::DEFAULT,
 335                        "Enable reductions support in superword.");
 336 
 337 PRODUCT_FLAG(bool,     UseCMoveUnconditionally, false, JVMFlag::DEFAULT,
 338                        "Use CMove (scalar and vector) ignoring profitability test.");
 339 
 340 PRODUCT_FLAG(bool,     DoReserveCopyInSuperWord, true, JVMFlag::DEFAULT,
 341                        "Create reserve copy of graph in SuperWord.");
 342 
 343 DEVELOP_FLAG(bool,     TraceSuperWord, false, JVMFlag::DEFAULT,
 344                        "Trace superword transforms");
 345 
 346 NOTPROD_FLAG(bool,     TraceNewVectors, false, JVMFlag::DEFAULT,
 347                        "Trace creation of Vector nodes");
 348 
 349 PRODUCT_FLAG_PD(bool,  OptoBundling, JVMFlag::DEFAULT,
 350                        "Generate nops to fill i-cache lines");
 351 
 352 PRODUCT_FLAG_PD(intx,  ConditionalMoveLimit, JVMFlag::RANGE,
 353                        "Limit of ops to make speculative when using CMOVE");
 354    FLAG_RANGE(         ConditionalMoveLimit, 0, max_jint);
 355 
 356 
 357     //  Set BranchOnRegister == false. See 4965987. 
 358 PRODUCT_FLAG(bool,     BranchOnRegister, false, JVMFlag::DEFAULT,
 359                        "Use Sparc V9 branch-on-register opcodes");
 360 
 361 DEVELOP_FLAG(bool,     SparcV9RegsHiBitsZero, true, JVMFlag::DEFAULT,
 362                        "Assume Sparc V9 I&L registers on V8+ systems are zero-extended");
 363 
 364 PRODUCT_FLAG(bool,     UseRDPCForConstantTableBase, false, JVMFlag::DEFAULT,
 365                        "Use Sparc RDPC instruction for the constant table base.");
 366 
 367 NOTPROD_FLAG(bool,     PrintIdealGraph, false, JVMFlag::DEFAULT,
 368                        "Print ideal graph to XML file / network interface. "
 369                        "By default attempts to connect to the visualizer on a socket.");
 370 
 371 NOTPROD_FLAG(intx,     PrintIdealGraphLevel, 0, JVMFlag::RANGE,
 372                        "Level of detail of the ideal graph printout. "
 373                        "System-wide value, 0=nothing is printed, 4=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    FLAG_RANGE(         PrintIdealGraphLevel, 0, 4);
 377 
 378 NOTPROD_FLAG(intx,     PrintIdealGraphPort, 4444, JVMFlag::RANGE,
 379                        "Ideal graph printer to network port");
 380    FLAG_RANGE(         PrintIdealGraphPort, 0, SHRT_MAX);
 381 
 382 NOTPROD_FLAG(ccstr,    PrintIdealGraphAddress, "127.0.0.1", JVMFlag::DEFAULT,
 383                        "IP address to connect to visualizer");
 384 
 385 NOTPROD_FLAG(ccstr,    PrintIdealGraphFile, NULL, JVMFlag::DEFAULT,
 386                        "File to dump ideal graph to.  If set overrides the "
 387                        "use of the network");
 388 
 389 PRODUCT_FLAG(bool,     UseBimorphicInlining, true, JVMFlag::DEFAULT,
 390                        "Profiling based inlining for two receivers");
 391 
 392 PRODUCT_FLAG(bool,     UseOnlyInlinedBimorphic, true, JVMFlag::DEFAULT,
 393                        "Don't use BimorphicInlining if can't inline a second method");
 394 
 395 PRODUCT_FLAG(bool,     InsertMemBarAfterArraycopy, true, JVMFlag::DEFAULT,
 396                        "Insert memory barrier after arraycopy call");
 397 
 398 DEVELOP_FLAG(bool,     SubsumeLoads, true, JVMFlag::DEFAULT,
 399                        "Attempt to compile while subsuming loads into machine "
 400                        "instructions.");
 401 
 402 DEVELOP_FLAG(bool,     StressRecompilation, false, JVMFlag::DEFAULT,
 403                        "Recompile each compiled method without subsuming loads "
 404                        "or escape analysis.");
 405 
 406 DEVELOP_FLAG(intx,     ImplicitNullCheckThreshold, 3, JVMFlag::RANGE,
 407                        "Don't do implicit null checks if NPE's in a method exceeds "
 408                        "limit");
 409    FLAG_RANGE(         ImplicitNullCheckThreshold, 0, max_jint);
 410 
 411 PRODUCT_FLAG(intx,     LoopOptsCount, 43, JVMFlag::RANGE,
 412                        "Set level of loop optimization for tier 1 compiles");
 413    FLAG_RANGE(         LoopOptsCount, 5, 43);
 414 
 415 
 416     //  controls for heat-based inlining 
 417 DEVELOP_FLAG(intx,     NodeCountInliningCutoff, 18000, JVMFlag::RANGE,
 418                        "If parser node generation exceeds limit stop inlining");
 419    FLAG_RANGE(         NodeCountInliningCutoff, 0, max_jint);
 420 
 421 DEVELOP_FLAG(intx,     NodeCountInliningStep, 1000, JVMFlag::RANGE,
 422                        "Target size of warm calls inlined between optimization passes");
 423    FLAG_RANGE(         NodeCountInliningStep, 0, max_jint);
 424 
 425 DEVELOP_FLAG(bool,     InlineWarmCalls, false, JVMFlag::DEFAULT,
 426                        "Use a heat-based priority queue to govern inlining");
 427 
 428 
 429     //  Max values must not exceed WarmCallInfo::MAX_VALUE(). 
 430 DEVELOP_FLAG(intx,     HotCallCountThreshold, 999999, JVMFlag::RANGE,
 431                        "large numbers of calls (per method invocation) force hotness");
 432    FLAG_RANGE(         HotCallCountThreshold, 0, ((intx)MIN2((int64_t)max_intx,(int64_t)(+1.0e10))));
 433 
 434 DEVELOP_FLAG(intx,     HotCallProfitThreshold, 999999, JVMFlag::RANGE,
 435                        "highly profitable inlining opportunities force hotness");
 436    FLAG_RANGE(         HotCallProfitThreshold, 0, ((intx)MIN2((int64_t)max_intx,(int64_t)(+1.0e10))));
 437 
 438 DEVELOP_FLAG(intx,     HotCallTrivialWork, -1, JVMFlag::RANGE,
 439                        "trivial execution time (no larger than this) forces hotness");
 440    FLAG_RANGE(         HotCallTrivialWork, -1, ((intx)MIN2((int64_t)max_intx,(int64_t)(+1.0e10))));
 441 
 442 DEVELOP_FLAG(intx,     HotCallTrivialSize, -1, JVMFlag::RANGE,
 443                        "trivial methods (no larger than this) force calls to be hot");
 444    FLAG_RANGE(         HotCallTrivialSize, -1, ((intx)MIN2((int64_t)max_intx,(int64_t)(+1.0e10))));
 445 
 446 DEVELOP_FLAG(intx,     WarmCallMinCount, -1, JVMFlag::RANGE,
 447                        "number of calls (per method invocation) to enable inlining");
 448    FLAG_RANGE(         WarmCallMinCount, -1, ((intx)MIN2((int64_t)max_intx,(int64_t)(+1.0e10))));
 449 
 450 DEVELOP_FLAG(intx,     WarmCallMinProfit, -1, JVMFlag::RANGE,
 451                        "number of calls (per method invocation) to enable inlining");
 452    FLAG_RANGE(         WarmCallMinProfit, -1, ((intx)MIN2((int64_t)max_intx,(int64_t)(+1.0e10))));
 453 
 454 DEVELOP_FLAG(intx,     WarmCallMaxWork, 999999, JVMFlag::RANGE,
 455                        "execution time of the largest inlinable method");
 456    FLAG_RANGE(         WarmCallMaxWork, 0, ((intx)MIN2((int64_t)max_intx,(int64_t)(+1.0e10))));
 457 
 458 DEVELOP_FLAG(intx,     WarmCallMaxSize, 999999, JVMFlag::RANGE,
 459                        "size of the largest inlinable method");
 460    FLAG_RANGE(         WarmCallMaxSize, 0, ((intx)MIN2((int64_t)max_intx,(int64_t)(+1.0e10))));
 461 
 462 PRODUCT_FLAG(intx,     MaxNodeLimit, 80000, JVMFlag::RANGE,
 463                        "Maximum number of nodes");
 464    FLAG_RANGE(         MaxNodeLimit, 1000, max_jint / 3);
 465 
 466 PRODUCT_FLAG(intx,     NodeLimitFudgeFactor, 2000, JVMFlag::CONSTRAINT,
 467                        "Fudge Factor for certain optimizations");
 468    FLAG_CONSTRAINT(    NodeLimitFudgeFactor, (void*)NodeLimitFudgeFactorConstraintFunc, JVMFlag::AfterErgo);
 469 
 470 PRODUCT_FLAG(bool,     UseJumpTables, true, JVMFlag::DEFAULT,
 471                        "Use JumpTables instead of a binary search tree for switches");
 472 
 473 PRODUCT_FLAG(bool,     UseDivMod, true, JVMFlag::DEFAULT,
 474                        "Use combined DivMod instruction if available");
 475 
 476 PRODUCT_FLAG_PD(intx,  MinJumpTableSize, JVMFlag::RANGE,
 477                        "Minimum number of targets in a generated jump table");
 478    FLAG_RANGE(         MinJumpTableSize, 0, max_intx);
 479 
 480 PRODUCT_FLAG(intx,     MaxJumpTableSize, 65000, JVMFlag::RANGE,
 481                        "Maximum number of targets in a generated jump table");
 482    FLAG_RANGE(         MaxJumpTableSize, 0, max_intx);
 483 
 484 PRODUCT_FLAG(intx,     MaxJumpTableSparseness, 5, JVMFlag::RANGE,
 485                        "Maximum sparseness for jumptables");
 486    FLAG_RANGE(         MaxJumpTableSparseness, 0, max_intx / 4);
 487 
 488 PRODUCT_FLAG(bool,     EliminateLocks, true, JVMFlag::DEFAULT,
 489                        "Coarsen locks when possible");
 490 
 491 PRODUCT_FLAG(bool,     EliminateNestedLocks, true, JVMFlag::DEFAULT,
 492                        "Eliminate nested locks of the same object when possible");
 493 
 494 NOTPROD_FLAG(bool,     PrintLockStatistics, false, JVMFlag::DEFAULT,
 495                        "Print precise statistics on the dynamic lock usage");
 496 
 497 PRODUCT_FLAG(bool,     PrintPreciseBiasedLockingStatistics, false, JVMFlag::DIAGNOSTIC,
 498                        "Print per-lock-site statistics of biased locking in JVM");
 499 
 500 PRODUCT_FLAG(bool,     PrintPreciseRTMLockingStatistics, false, JVMFlag::DIAGNOSTIC,
 501                        "Print per-lock-site statistics of rtm locking in JVM");
 502 
 503 NOTPROD_FLAG(bool,     PrintEliminateLocks, false, JVMFlag::DEFAULT,
 504                        "Print out when locks are eliminated");
 505 
 506 PRODUCT_FLAG(bool,     EliminateAutoBox, true, JVMFlag::DEFAULT,
 507                        "Control optimizations for autobox elimination");
 508 
 509 PRODUCT_FLAG(intx,     AutoBoxCacheMax, 128, JVMFlag::RANGE,
 510                        "Sets max value cached by the java.lang.Integer autobox cache");
 511    FLAG_RANGE(         AutoBoxCacheMax, 0, max_jint);
 512 
 513 PRODUCT_FLAG(bool,     AggressiveUnboxing, true, JVMFlag::DIAGNOSTIC,
 514                        "Control optimizations for aggressive boxing elimination");
 515 
 516 DEVELOP_FLAG(bool,     TracePostallocExpand, false, JVMFlag::DEFAULT,
 517                        "Trace expanding nodes after"
 518                        " register allocation.");
 519 
 520 PRODUCT_FLAG(bool,     DoEscapeAnalysis, true, JVMFlag::DEFAULT,
 521                        "Perform escape analysis");
 522 
 523 PRODUCT_FLAG(double,   EscapeAnalysisTimeout, 20. DEBUG_ONLY(+40.), JVMFlag::RANGE,
 524                        "Abort EA when it reaches time limit (in sec)");
 525    FLAG_RANGE(         EscapeAnalysisTimeout, 0, DBL_MAX);
 526 
 527 DEVELOP_FLAG(bool,     ExitEscapeAnalysisOnTimeout, true, JVMFlag::DEFAULT,
 528                        "Exit or throw assert in EA when it reaches time limit");
 529 
 530 NOTPROD_FLAG(bool,     PrintEscapeAnalysis, false, JVMFlag::DEFAULT,
 531                        "Print the results of escape analysis");
 532 
 533 PRODUCT_FLAG(bool,     EliminateAllocations, true, JVMFlag::DEFAULT,
 534                        "Use escape analysis to eliminate allocations");
 535 
 536 NOTPROD_FLAG(bool,     PrintEliminateAllocations, false, JVMFlag::DEFAULT,
 537                        "Print out when allocations are eliminated");
 538 
 539 PRODUCT_FLAG(intx,     EliminateAllocationArraySizeLimit, 64, JVMFlag::RANGE,
 540                        "Array size (number of elements) limit for scalar replacement");
 541    FLAG_RANGE(         EliminateAllocationArraySizeLimit, 0, max_jint);
 542 
 543 PRODUCT_FLAG(bool,     OptimizePtrCompare, true, JVMFlag::DEFAULT,
 544                        "Use escape analysis to optimize pointers compare");
 545 
 546 NOTPROD_FLAG(bool,     PrintOptimizePtrCompare, false, JVMFlag::DEFAULT,
 547                        "Print information about optimized pointers compare");
 548 
 549 NOTPROD_FLAG(bool,     VerifyConnectionGraph, true, JVMFlag::DEFAULT,
 550                        "Verify Connection Graph construction in Escape Analysis");
 551 
 552 PRODUCT_FLAG(bool,     UseOptoBiasInlining, true, JVMFlag::DEFAULT,
 553                        "Generate biased locking code in C2 ideal graph");
 554 
 555 PRODUCT_FLAG(bool,     OptimizeStringConcat, true, JVMFlag::DEFAULT,
 556                        "Optimize the construction of Strings by StringBuilder");
 557 
 558 NOTPROD_FLAG(bool,     PrintOptimizeStringConcat, false, JVMFlag::DEFAULT,
 559                        "Print information about transformations performed on Strings");
 560 
 561 PRODUCT_FLAG(intx,     ValueSearchLimit, 1000, JVMFlag::RANGE,
 562                        "Recursion limit in PhaseMacroExpand::value_from_mem_phi");
 563    FLAG_RANGE(         ValueSearchLimit, 0, max_jint);
 564 
 565 PRODUCT_FLAG(intx,     MaxLabelRootDepth, 1100, JVMFlag::RANGE,
 566                        "Maximum times call Label_Root to prevent stack overflow");
 567    FLAG_RANGE(         MaxLabelRootDepth, 100, max_jint);
 568 
 569 PRODUCT_FLAG(intx,     DominatorSearchLimit, 1000, JVMFlag::DIAGNOSTIC | JVMFlag::RANGE,
 570                        "Iterations limit in Node::dominates");
 571    FLAG_RANGE(         DominatorSearchLimit, 0, max_jint);
 572 
 573 PRODUCT_FLAG(bool,     BlockLayoutByFrequency, true, JVMFlag::DEFAULT,
 574                        "Use edge frequencies to drive block ordering");
 575 
 576 PRODUCT_FLAG(intx,     BlockLayoutMinDiamondPercentage, 20, JVMFlag::RANGE,
 577                        "Miniumum %% of a successor (predecessor) for which block "
 578                        "layout a will allow a fork (join) in a single chain");
 579    FLAG_RANGE(         BlockLayoutMinDiamondPercentage, 0, 100);
 580 
 581 PRODUCT_FLAG(bool,     BlockLayoutRotateLoops, true, JVMFlag::DEFAULT,
 582                        "Allow back branches to be fall throughs in the block layout");
 583 
 584 PRODUCT_FLAG(bool,     InlineReflectionGetCallerClass, true, JVMFlag::DIAGNOSTIC,
 585                        "inline sun.reflect.Reflection.getCallerClass(), known to be "
 586                        "part of base library DLL");
 587 
 588 PRODUCT_FLAG(bool,     InlineObjectCopy, true, JVMFlag::DIAGNOSTIC,
 589                        "inline Object.clone and Arrays.copyOf[Range] intrinsics");
 590 
 591 PRODUCT_FLAG(bool,     SpecialStringCompareTo, true, JVMFlag::DIAGNOSTIC,
 592                        "special version of string compareTo");
 593 
 594 PRODUCT_FLAG(bool,     SpecialStringIndexOf, true, JVMFlag::DIAGNOSTIC,
 595                        "special version of string indexOf");
 596 
 597 PRODUCT_FLAG(bool,     SpecialStringEquals, true, JVMFlag::DIAGNOSTIC,
 598                        "special version of string equals");
 599 
 600 PRODUCT_FLAG(bool,     SpecialArraysEquals, true, JVMFlag::DIAGNOSTIC,
 601                        "special version of Arrays.equals(char[],char[])");
 602 
 603 PRODUCT_FLAG(bool,     SpecialEncodeISOArray, true, JVMFlag::DIAGNOSTIC,
 604                        "special version of ISO_8859_1$Encoder.encodeISOArray");
 605 
 606 DEVELOP_FLAG(bool,     BailoutToInterpreterForThrows, false, JVMFlag::DEFAULT,
 607                        "Compiled methods which throws/catches exceptions will be "
 608                        "deopt and intp.");
 609 
 610 DEVELOP_FLAG(bool,     ConvertCmpD2CmpF, true, JVMFlag::DEFAULT,
 611                        "Convert cmpD to cmpF when one input is constant in float range");
 612 
 613 DEVELOP_FLAG(bool,     ConvertFloat2IntClipping, true, JVMFlag::DEFAULT,
 614                        "Convert float2int clipping idiom to integer clipping");
 615 
 616 DEVELOP_FLAG(bool,     MonomorphicArrayCheck, true, JVMFlag::DEFAULT,
 617                        "Uncommon-trap array store checks that require full type check");
 618 
 619 NOTPROD_FLAG(bool,     TracePhaseCCP, false, JVMFlag::DEFAULT,
 620                        "Print progress during Conditional Constant Propagation");
 621 
 622 DEVELOP_FLAG(bool,     PrintDominators, false, JVMFlag::DEFAULT,
 623                        "Print out dominator trees for GVN");
 624 
 625 PRODUCT_FLAG(bool,     TraceSpilling, false, JVMFlag::DIAGNOSTIC,
 626                        "Trace spilling");
 627 
 628 PRODUCT_FLAG(bool,     TraceTypeProfile, false, JVMFlag::DIAGNOSTIC,
 629                        "Trace type profile");
 630 
 631 DEVELOP_FLAG(bool,     PoisonOSREntry, true, JVMFlag::DEFAULT,
 632                        "Detect abnormal calls to OSR code");
 633 
 634 DEVELOP_FLAG(bool,     SoftMatchFailure, trueInProduct, JVMFlag::DEFAULT,
 635                        "If the DFA fails to match a node, print a message and bail out");
 636 
 637 DEVELOP_FLAG(bool,     InlineAccessors, true, JVMFlag::DEFAULT,
 638                        "inline accessor methods (get/set)");
 639 
 640 PRODUCT_FLAG(intx,     TypeProfileMajorReceiverPercent, 90, JVMFlag::RANGE,
 641                        "% of major receiver type to all profiled receivers");
 642    FLAG_RANGE(         TypeProfileMajorReceiverPercent, 0, 100);
 643 
 644 PRODUCT_FLAG(bool,     PrintIntrinsics, false, JVMFlag::DIAGNOSTIC,
 645                        "prints attempted and successful inlining of intrinsics");
 646 
 647 DEVELOP_FLAG(bool,     StressReflectiveCode, false, JVMFlag::DEFAULT,
 648                        "Use inexact types at allocations, etc., to test reflection");
 649 
 650 PRODUCT_FLAG(bool,     DebugInlinedCalls, true, JVMFlag::DIAGNOSTIC,
 651                        "If false, restricts profiled locations to the root method only");
 652 
 653 DEVELOP_FLAG(bool,     VerifyLoopOptimizations, false, JVMFlag::DEFAULT,
 654                        "verify major loop optimizations");
 655 
 656 PRODUCT_FLAG(bool,     ProfileDynamicTypes, true, JVMFlag::DIAGNOSTIC,
 657                        "do extra type profiling and use it more aggressively");
 658 
 659 DEVELOP_FLAG(bool,     TraceIterativeGVN, false, JVMFlag::DEFAULT,
 660                        "Print progress during Iterative Global Value Numbering");
 661 
 662 DEVELOP_FLAG(bool,     VerifyIterativeGVN, false, JVMFlag::DEFAULT,
 663                        "Verify Def-Use modifications during sparse Iterative Global "
 664                        "Value Numbering");
 665 
 666 NOTPROD_FLAG(bool,     TraceCISCSpill, false, JVMFlag::DEFAULT,
 667                        "Trace allocators use of cisc spillable instructions");
 668 
 669 PRODUCT_FLAG(bool,     SplitIfBlocks, true, JVMFlag::DEFAULT,
 670                        "Clone compares and control flow through merge points to fold "
 671                        "some branches");
 672 
 673 DEVELOP_FLAG(intx,     FreqCountInvocations, 1, JVMFlag::RANGE,
 674                        "Scaling factor for branch frequencies (deprecated)");
 675    FLAG_RANGE(         FreqCountInvocations, 1, max_intx);
 676 
 677 PRODUCT_FLAG(intx,     AliasLevel, 3, JVMFlag::RANGE | JVMFlag::CONSTRAINT,
 678                        "0 for no aliasing, 1 for oop/field/static/array split, "
 679                        "2 for class split, 3 for unique instances");
 680    FLAG_RANGE(         AliasLevel, 0, 3);
 681    FLAG_CONSTRAINT(    AliasLevel, (void*)AliasLevelConstraintFunc, JVMFlag::AfterErgo);
 682 
 683 DEVELOP_FLAG(bool,     VerifyAliases, false, JVMFlag::DEFAULT,
 684                        "perform extra checks on the results of alias analysis");
 685 
 686 PRODUCT_FLAG(bool,     IncrementalInline, true, JVMFlag::DEFAULT,
 687                        "do post parse inlining");
 688 
 689 DEVELOP_FLAG(bool,     AlwaysIncrementalInline, false, JVMFlag::DEFAULT,
 690                        "do all inlining incrementally");
 691 
 692 PRODUCT_FLAG(intx,     LiveNodeCountInliningCutoff, 40000, JVMFlag::RANGE,
 693                        "max number of live nodes in a method");
 694    FLAG_RANGE(         LiveNodeCountInliningCutoff, 0, max_juint / 8);
 695 
 696 PRODUCT_FLAG(bool,     OptimizeExpensiveOps, true, JVMFlag::DIAGNOSTIC,
 697                        "Find best control for expensive operations");
 698 
 699 PRODUCT_FLAG(bool,     UseMathExactIntrinsics, true, JVMFlag::DIAGNOSTIC,
 700                        "Enables intrinsification of various java.lang.Math functions");
 701 
 702 PRODUCT_FLAG(bool,     UseCharacterCompareIntrinsics, false, JVMFlag::DIAGNOSTIC,
 703                        "Enables intrinsification of java.lang.Character functions");
 704 
 705 PRODUCT_FLAG(bool,     UseMultiplyToLenIntrinsic, false, JVMFlag::DIAGNOSTIC,
 706                        "Enables intrinsification of BigInteger.multiplyToLen()");
 707 
 708 PRODUCT_FLAG(bool,     UseSquareToLenIntrinsic, false, JVMFlag::DIAGNOSTIC,
 709                        "Enables intrinsification of BigInteger.squareToLen()");
 710 
 711 PRODUCT_FLAG(bool,     UseMulAddIntrinsic, false, JVMFlag::DIAGNOSTIC,
 712                        "Enables intrinsification of BigInteger.mulAdd()");
 713 
 714 PRODUCT_FLAG(bool,     UseMontgomeryMultiplyIntrinsic, false, JVMFlag::DIAGNOSTIC,
 715                        "Enables intrinsification of BigInteger.montgomeryMultiply()");
 716 
 717 PRODUCT_FLAG(bool,     UseMontgomerySquareIntrinsic, false, JVMFlag::DIAGNOSTIC,
 718                        "Enables intrinsification of BigInteger.montgomerySquare()");
 719 
 720 PRODUCT_FLAG(bool,     UseTypeSpeculation, true, JVMFlag::DEFAULT,
 721                        "Speculatively propagate types from profiles");
 722 
 723 PRODUCT_FLAG(bool,     UseInlineDepthForSpeculativeTypes, true, JVMFlag::DIAGNOSTIC,
 724                        "Carry inline depth of profile point with speculative type "
 725                        "and give priority to profiling from lower inline depth");
 726 
 727 PRODUCT_FLAG_PD(bool,  TrapBasedRangeChecks, JVMFlag::DEFAULT,
 728                        "Generate code for range checks that uses a cmp and trap "
 729                        "instruction raising SIGTRAP. Used on PPC64.");
 730 
 731 PRODUCT_FLAG(intx,     ArrayCopyLoadStoreMaxElem, 8, JVMFlag::RANGE,
 732                        "Maximum number of arraycopy elements inlined as a sequence of"
 733                        "loads/stores");
 734    FLAG_RANGE(         ArrayCopyLoadStoreMaxElem, 0, max_intx);
 735 
 736 DEVELOP_FLAG(bool,     StressArrayCopyMacroNode, false, JVMFlag::DEFAULT,
 737                        "Perform ArrayCopy load/store replacement during IGVN only");
 738 
 739 DEVELOP_FLAG(bool,     RenumberLiveNodes, true, JVMFlag::DEFAULT,
 740                        "Renumber live nodes");
 741 
 742 PRODUCT_FLAG(uintx,    LoopStripMiningIter, 0, JVMFlag::RANGE,
 743                        "Number of iterations in strip mined loop");
 744    FLAG_RANGE(         LoopStripMiningIter, 0, max_juint);
 745 
 746 PRODUCT_FLAG(uintx,    LoopStripMiningIterShortLoop, 0, JVMFlag::RANGE,
 747                        "Loop with fewer iterations are not strip mined");
 748    FLAG_RANGE(         LoopStripMiningIterShortLoop, 0, max_juint);
 749 
 750 PRODUCT_FLAG(bool,     UseProfiledLoopPredicate, true, JVMFlag::DEFAULT,
 751                        "Move predicates out of loops based on profiling data");
 752 
 753 PRODUCT_FLAG(bool,     ExpandSubTypeCheckAtParseTime, false, JVMFlag::DIAGNOSTIC,
 754                        "Do not use subtype check macro node");
 755 #endif // COMPILER2
 756 #endif // SHARE_OPTO_C2_GLOBALS_HPP