1 /* 2 * Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_VM_OPTO_C2_GLOBALS_HPP 26 #define SHARE_VM_OPTO_C2_GLOBALS_HPP 27 28 #include "runtime/globals.hpp" 29 #include "utilities/macros.hpp" 30 31 #include CPU_HEADER(c2_globals) 32 #include OS_HEADER(c2_globals) 33 34 // 35 // Defines all globals flags used by the server compiler. 36 // 37 38 #define C2_FLAGS(develop, \ 39 develop_pd, \ 40 product, \ 41 product_pd, \ 42 diagnostic, \ 43 diagnostic_pd, \ 44 experimental, \ 45 notproduct, \ 46 range, \ 47 constraint, \ 48 writeable) \ 49 \ 50 diagnostic(bool, StressLCM, false, \ 51 "Randomize instruction scheduling in LCM") \ 52 \ 53 diagnostic(bool, StressGCM, false, \ 54 "Randomize instruction scheduling in GCM") \ 55 \ 56 develop(intx, OptoPrologueNops, 0, \ 57 "Insert this many extra nop instructions " \ 58 "in the prologue of every nmethod") \ 59 range(0, 128) \ 60 \ 61 product_pd(intx, InteriorEntryAlignment, \ 62 "Code alignment for interior entry points " \ 63 "in generated code (in bytes)") \ 64 constraint(InteriorEntryAlignmentConstraintFunc, AfterErgo) \ 65 \ 66 product(intx, MaxLoopPad, (OptoLoopAlignment-1), \ 67 "Align a loop if padding size in bytes is less or equal to this " \ 68 "value") \ 69 range(0, max_jint) \ 70 \ 71 product(intx, MaxVectorSize, 64, \ 72 "Max vector size in bytes, " \ 73 "actual size could be less depending on elements type") \ 74 range(0, max_jint) \ 75 \ 76 product(bool, AlignVector, true, \ 77 "Perform vector store/load alignment in loop") \ 78 \ 79 product(intx, NumberOfLoopInstrToAlign, 4, \ 80 "Number of first instructions in a loop to align") \ 81 range(0, max_jint) \ 82 \ 83 notproduct(intx, IndexSetWatch, 0, \ 84 "Trace all operations on this IndexSet (-1 means all, 0 none)") \ 85 range(-1, 0) \ 86 \ 87 develop(intx, OptoNodeListSize, 4, \ 88 "Starting allocation size of Node_List data structures") \ 89 range(0, max_jint) \ 90 \ 91 develop(intx, OptoBlockListSize, 8, \ 92 "Starting allocation size of Block_List data structures") \ 93 range(0, max_jint) \ 94 \ 95 develop(intx, OptoPeepholeAt, -1, \ 96 "Apply peephole optimizations to this peephole rule") \ 97 \ 98 notproduct(bool, PrintIdeal, false, \ 99 "Print ideal graph before code generation") \ 100 \ 101 notproduct(bool, PrintOpto, false, \ 102 "Print compiler2 attempts") \ 103 \ 104 notproduct(bool, PrintOptoInlining, false, \ 105 "Print compiler2 inlining decisions") \ 106 \ 107 notproduct(bool, VerifyOpto, false, \ 108 "Apply more time consuming verification during compilation") \ 109 \ 110 notproduct(bool, VerifyIdealNodeCount, false, \ 111 "Verify that tracked dead ideal node count is accurate") \ 112 \ 113 notproduct(bool, PrintIdealNodeCount, false, \ 114 "Print liveness counts of ideal nodes") \ 115 \ 116 notproduct(bool, VerifyOptoOopOffsets, false, \ 117 "Check types of base addresses in field references") \ 118 \ 119 develop(bool, IdealizedNumerics, false, \ 120 "Check performance difference allowing FP " \ 121 "associativity and commutativity...") \ 122 \ 123 develop(bool, OptoBreakpoint, false, \ 124 "insert breakpoint at method entry") \ 125 \ 126 notproduct(bool, OptoBreakpointOSR, false, \ 127 "insert breakpoint at osr method entry") \ 128 \ 129 notproduct(intx, BreakAtNode, 0, \ 130 "Break at construction of this Node (either _idx or _debug_idx)") \ 131 \ 132 notproduct(bool, OptoBreakpointC2R, false, \ 133 "insert breakpoint at runtime stub entry") \ 134 \ 135 notproduct(bool, OptoNoExecute, false, \ 136 "Attempt to parse and compile but do not execute generated code") \ 137 \ 138 notproduct(bool, PrintOptoStatistics, false, \ 139 "Print New compiler statistics") \ 140 \ 141 diagnostic(bool, PrintOptoAssembly, false, \ 142 "Print New compiler assembly output") \ 143 \ 144 develop_pd(bool, OptoPeephole, \ 145 "Apply peephole optimizations after register allocation") \ 146 \ 147 develop(bool, OptoRemoveUseless, true, \ 148 "Remove useless nodes after parsing") \ 149 \ 150 notproduct(bool, PrintFrameConverterAssembly, false, \ 151 "Print New compiler assembly output for frame converters") \ 152 \ 153 notproduct(bool, PrintParseStatistics, false, \ 154 "Print nodes, transforms and new values made per bytecode parsed")\ 155 \ 156 notproduct(bool, PrintOptoPeephole, false, \ 157 "Print New compiler peephole replacements") \ 158 \ 159 develop(bool, PrintCFGBlockFreq, false, \ 160 "Print CFG block freqencies") \ 161 \ 162 develop(bool, TraceOptoParse, false, \ 163 "Trace bytecode parse and control-flow merge") \ 164 \ 165 product_pd(intx, LoopUnrollLimit, \ 166 "Unroll loop bodies with node count less than this") \ 167 range(0, max_jint / 4) \ 168 \ 169 product_pd(intx, LoopPercentProfileLimit, \ 170 "Unroll loop bodies with % node count of profile limit") \ 171 range(10, 100) \ 172 \ 173 product(intx, LoopMaxUnroll, 16, \ 174 "Maximum number of unrolls for main loop") \ 175 range(0, max_jint) \ 176 \ 177 product_pd(bool, SuperWordLoopUnrollAnalysis, \ 178 "Map number of unrolls for main loop via " \ 179 "Superword Level Parallelism analysis") \ 180 \ 181 diagnostic_pd(bool, PostLoopMultiversioning, \ 182 "Multi versioned post loops to eliminate range checks") \ 183 \ 184 notproduct(bool, TraceSuperWordLoopUnrollAnalysis, false, \ 185 "Trace what Superword Level Parallelism analysis applies") \ 186 \ 187 product(intx, LoopUnrollMin, 4, \ 188 "Minimum number of unroll loop bodies before checking progress" \ 189 "of rounds of unroll,optimize,..") \ 190 range(0, max_jint) \ 191 \ 192 develop(intx, UnrollLimitForProfileCheck, 1, \ 193 "Don't use profile_trip_cnt() to restrict unrolling until " \ 194 "unrolling would push the number of unrolled iterations above " \ 195 "UnrollLimitForProfileCheck. A higher value allows more " \ 196 "unrolling. Zero acts as a very large value." ) \ 197 range(0, max_intx) \ 198 \ 199 product(intx, MultiArrayExpandLimit, 6, \ 200 "Maximum number of individual allocations in an inline-expanded " \ 201 "multianewarray instruction") \ 202 range(0, max_jint) \ 203 \ 204 notproduct(bool, TraceProfileTripCount, false, \ 205 "Trace profile loop trip count information") \ 206 \ 207 product(bool, UseCountedLoopSafepoints, false, \ 208 "Force counted loops to keep a safepoint") \ 209 \ 210 product(bool, UseLoopPredicate, true, \ 211 "Generate a predicate to select fast/slow loop versions") \ 212 \ 213 develop(bool, TraceLoopPredicate, false, \ 214 "Trace generation of loop predicates") \ 215 \ 216 develop(bool, TraceLoopOpts, false, \ 217 "Trace executed loop optimizations") \ 218 \ 219 develop(bool, TraceLoopLimitCheck, false, \ 220 "Trace generation of loop limits checks") \ 221 \ 222 develop(bool, TraceRangeLimitCheck, false, \ 223 "Trace additional overflow checks in RCE") \ 224 \ 225 /* OptimizeFill not yet supported on PowerPC. */ \ 226 product(bool, OptimizeFill, true PPC64_ONLY(&& false), \ 227 "convert fill/copy loops into intrinsic") \ 228 \ 229 develop(bool, TraceOptimizeFill, false, \ 230 "print detailed information about fill conversion") \ 231 \ 232 develop(bool, OptoCoalesce, true, \ 233 "Use Conservative Copy Coalescing in the Register Allocator") \ 234 \ 235 develop(bool, UseUniqueSubclasses, true, \ 236 "Narrow an abstract reference to the unique concrete subclass") \ 237 \ 238 develop(bool, UseExactTypes, true, \ 239 "Use exact types to eliminate array store checks and v-calls") \ 240 \ 241 product(intx, TrackedInitializationLimit, 50, \ 242 "When initializing fields, track up to this many words") \ 243 range(0, 65535) \ 244 \ 245 product(bool, ReduceFieldZeroing, true, \ 246 "When initializing fields, try to avoid needless zeroing") \ 247 \ 248 product(bool, ReduceInitialCardMarks, true, \ 249 "When initializing fields, try to avoid needless card marks") \ 250 \ 251 product(bool, ReduceBulkZeroing, true, \ 252 "When bulk-initializing, try to avoid needless zeroing") \ 253 \ 254 product(bool, UseFPUForSpilling, false, \ 255 "Spill integer registers to FPU instead of stack when possible") \ 256 \ 257 develop_pd(intx, RegisterCostAreaRatio, \ 258 "Spill selection in reg allocator: scale area by (X/64K) before " \ 259 "adding cost") \ 260 \ 261 develop_pd(bool, UseCISCSpill, \ 262 "Use ADLC supplied cisc instructions during allocation") \ 263 \ 264 notproduct(bool, VerifyGraphEdges , false, \ 265 "Verify Bi-directional Edges") \ 266 \ 267 notproduct(bool, VerifyDUIterators, true, \ 268 "Verify the safety of all iterations of Bi-directional Edges") \ 269 \ 270 notproduct(bool, VerifyHashTableKeys, true, \ 271 "Verify the immutability of keys in the VN hash tables") \ 272 \ 273 notproduct(bool, VerifyRegisterAllocator , false, \ 274 "Verify Register Allocator") \ 275 \ 276 develop_pd(intx, FLOATPRESSURE, \ 277 "Number of float LRG's that constitute high register pressure") \ 278 range(0, max_jint) \ 279 \ 280 develop_pd(intx, INTPRESSURE, \ 281 "Number of integer LRG's that constitute high register pressure") \ 282 range(0, max_jint) \ 283 \ 284 notproduct(bool, TraceOptoPipelining, false, \ 285 "Trace pipelining information") \ 286 \ 287 notproduct(bool, TraceOptoOutput, false, \ 288 "Trace pipelining information") \ 289 \ 290 product_pd(bool, OptoScheduling, \ 291 "Instruction Scheduling after register allocation") \ 292 \ 293 product_pd(bool, OptoRegScheduling, \ 294 "Instruction Scheduling before register allocation for pressure") \ 295 \ 296 product(bool, PartialPeelLoop, true, \ 297 "Partial peel (rotate) loops") \ 298 \ 299 product(intx, PartialPeelNewPhiDelta, 0, \ 300 "Additional phis that can be created by partial peeling") \ 301 range(0, max_jint) \ 302 \ 303 notproduct(bool, TracePartialPeeling, false, \ 304 "Trace partial peeling (loop rotation) information") \ 305 \ 306 product(bool, PartialPeelAtUnsignedTests, true, \ 307 "Partial peel at unsigned tests if no signed test exists") \ 308 \ 309 product(bool, ReassociateInvariants, true, \ 310 "Enable reassociation of expressions with loop invariants.") \ 311 \ 312 product(bool, LoopUnswitching, true, \ 313 "Enable loop unswitching (a form of invariant test hoisting)") \ 314 \ 315 notproduct(bool, TraceLoopUnswitching, false, \ 316 "Trace loop unswitching") \ 317 \ 318 product(bool, AllowVectorizeOnDemand, true, \ 319 "Globally supress vectorization set in VectorizeMethod") \ 320 \ 321 product(bool, UseSuperWord, true, \ 322 "Transform scalar operations into superword operations") \ 323 \ 324 develop(bool, SuperWordRTDepCheck, false, \ 325 "Enable runtime dependency checks.") \ 326 \ 327 product(bool, SuperWordReductions, true, \ 328 "Enable reductions support in superword.") \ 329 \ 330 product(bool, UseCMoveUnconditionally, false, \ 331 "Use CMove (scalar and vector) ignoring profitability test.") \ 332 \ 333 product(bool, DoReserveCopyInSuperWord, true, \ 334 "Create reserve copy of graph in SuperWord.") \ 335 \ 336 notproduct(bool, TraceSuperWord, false, \ 337 "Trace superword transforms") \ 338 \ 339 notproduct(bool, TraceNewVectors, false, \ 340 "Trace creation of Vector nodes") \ 341 \ 342 product_pd(bool, OptoBundling, \ 343 "Generate nops to fill i-cache lines") \ 344 \ 345 product_pd(intx, ConditionalMoveLimit, \ 346 "Limit of ops to make speculative when using CMOVE") \ 347 range(0, max_jint) \ 348 \ 349 /* Set BranchOnRegister == false. See 4965987. */ \ 350 product(bool, BranchOnRegister, false, \ 351 "Use Sparc V9 branch-on-register opcodes") \ 352 \ 353 develop(bool, SparcV9RegsHiBitsZero, true, \ 354 "Assume Sparc V9 I&L registers on V8+ systems are zero-extended") \ 355 \ 356 product(bool, UseRDPCForConstantTableBase, false, \ 357 "Use Sparc RDPC instruction for the constant table base.") \ 358 \ 359 notproduct(bool, PrintIdealGraph, false, \ 360 "Print ideal graph to XML file / network interface. " \ 361 "By default attempts to connect to the visualizer on a socket.") \ 362 \ 363 notproduct(intx, PrintIdealGraphLevel, 0, \ 364 "Level of detail of the ideal graph printout. " \ 365 "System-wide value, 0=nothing is printed, 4=all details printed. "\ 366 "Level of detail of printouts can be set on a per-method level " \ 367 "as well by using CompileCommand=option.") \ 368 range(0, 4) \ 369 \ 370 notproduct(intx, PrintIdealGraphPort, 4444, \ 371 "Ideal graph printer to network port") \ 372 range(0, SHRT_MAX) \ 373 \ 374 notproduct(ccstr, PrintIdealGraphAddress, "127.0.0.1", \ 375 "IP address to connect to visualizer") \ 376 \ 377 notproduct(ccstr, PrintIdealGraphFile, NULL, \ 378 "File to dump ideal graph to. If set overrides the " \ 379 "use of the network") \ 380 \ 381 product(bool, UseBimorphicInlining, true, \ 382 "Profiling based inlining for two receivers") \ 383 \ 384 product(bool, UseOnlyInlinedBimorphic, true, \ 385 "Don't use BimorphicInlining if can't inline a second method") \ 386 \ 387 product(bool, InsertMemBarAfterArraycopy, true, \ 388 "Insert memory barrier after arraycopy call") \ 389 \ 390 develop(bool, SubsumeLoads, true, \ 391 "Attempt to compile while subsuming loads into machine " \ 392 "instructions.") \ 393 \ 394 develop(bool, StressRecompilation, false, \ 395 "Recompile each compiled method without subsuming loads " \ 396 "or escape analysis.") \ 397 \ 398 develop(intx, ImplicitNullCheckThreshold, 3, \ 399 "Don't do implicit null checks if NPE's in a method exceeds " \ 400 "limit") \ 401 range(0, max_jint) \ 402 \ 403 product(intx, LoopOptsCount, 43, \ 404 "Set level of loop optimization for tier 1 compiles") \ 405 range(5, 43) \ 406 \ 407 /* controls for heat-based inlining */ \ 408 \ 409 develop(intx, NodeCountInliningCutoff, 18000, \ 410 "If parser node generation exceeds limit stop inlining") \ 411 range(0, max_jint) \ 412 \ 413 develop(intx, NodeCountInliningStep, 1000, \ 414 "Target size of warm calls inlined between optimization passes") \ 415 range(0, max_jint) \ 416 \ 417 develop(bool, InlineWarmCalls, false, \ 418 "Use a heat-based priority queue to govern inlining") \ 419 \ 420 develop(intx, HotCallCountThreshold, 999999, \ 421 "large numbers of calls (per method invocation) force hotness") \ 422 range(0, max_intx) \ 423 \ 424 develop(intx, HotCallProfitThreshold, 999999, \ 425 "highly profitable inlining opportunities force hotness") \ 426 range(0, max_intx) \ 427 \ 428 develop(intx, HotCallTrivialWork, -1, \ 429 "trivial execution time (no larger than this) forces hotness") \ 430 range(-1, max_intx) \ 431 \ 432 develop(intx, HotCallTrivialSize, -1, \ 433 "trivial methods (no larger than this) force calls to be hot") \ 434 range(-1, max_intx) \ 435 \ 436 develop(intx, WarmCallMinCount, -1, \ 437 "number of calls (per method invocation) to enable inlining") \ 438 range(-1, max_intx) \ 439 \ 440 develop(intx, WarmCallMinProfit, -1, \ 441 "number of calls (per method invocation) to enable inlining") \ 442 range(-1, max_intx) \ 443 \ 444 develop(intx, WarmCallMaxWork, 999999, \ 445 "execution time of the largest inlinable method") \ 446 range(0, max_intx) \ 447 \ 448 develop(intx, WarmCallMaxSize, 999999, \ 449 "size of the largest inlinable method") \ 450 range(0, max_intx) \ 451 \ 452 product(intx, MaxNodeLimit, 80000, \ 453 "Maximum number of nodes") \ 454 range(1000, max_jint / 3) \ 455 \ 456 product(intx, NodeLimitFudgeFactor, 2000, \ 457 "Fudge Factor for certain optimizations") \ 458 constraint(NodeLimitFudgeFactorConstraintFunc, AfterErgo) \ 459 \ 460 product(bool, UseJumpTables, true, \ 461 "Use JumpTables instead of a binary search tree for switches") \ 462 \ 463 product(bool, UseDivMod, true, \ 464 "Use combined DivMod instruction if available") \ 465 \ 466 product_pd(intx, MinJumpTableSize, \ 467 "Minimum number of targets in a generated jump table") \ 468 range(0, max_intx) \ 469 \ 470 product(intx, MaxJumpTableSize, 65000, \ 471 "Maximum number of targets in a generated jump table") \ 472 range(0, max_intx) \ 473 \ 474 product(intx, MaxJumpTableSparseness, 5, \ 475 "Maximum sparseness for jumptables") \ 476 range(0, max_intx / 4) \ 477 \ 478 product(bool, EliminateLocks, true, \ 479 "Coarsen locks when possible") \ 480 \ 481 product(bool, EliminateNestedLocks, true, \ 482 "Eliminate nested locks of the same object when possible") \ 483 \ 484 notproduct(bool, PrintLockStatistics, false, \ 485 "Print precise statistics on the dynamic lock usage") \ 486 \ 487 diagnostic(bool, PrintPreciseBiasedLockingStatistics, false, \ 488 "Print per-lock-site statistics of biased locking in JVM") \ 489 \ 490 diagnostic(bool, PrintPreciseRTMLockingStatistics, false, \ 491 "Print per-lock-site statistics of rtm locking in JVM") \ 492 \ 493 notproduct(bool, PrintEliminateLocks, false, \ 494 "Print out when locks are eliminated") \ 495 \ 496 product(bool, EliminateAutoBox, true, \ 497 "Control optimizations for autobox elimination") \ 498 \ 499 diagnostic(bool, UseImplicitStableValues, true, \ 500 "Mark well-known stable fields as such (e.g. String.value)") \ 501 \ 502 product(intx, AutoBoxCacheMax, 128, \ 503 "Sets max value cached by the java.lang.Integer autobox cache") \ 504 range(0, max_jint) \ 505 \ 506 experimental(bool, AggressiveUnboxing, false, \ 507 "Control optimizations for aggressive boxing elimination") \ 508 \ 509 develop(bool, TracePostallocExpand, false, "Trace expanding nodes after" \ 510 " register allocation.") \ 511 \ 512 product(bool, DoEscapeAnalysis, true, \ 513 "Perform escape analysis") \ 514 \ 515 product(double, EscapeAnalysisTimeout, 20. DEBUG_ONLY(+40.), \ 516 "Abort EA when it reaches time limit (in sec)") \ 517 range(0, DBL_MAX) \ 518 \ 519 develop(bool, ExitEscapeAnalysisOnTimeout, true, \ 520 "Exit or throw assert in EA when it reaches time limit") \ 521 \ 522 notproduct(bool, PrintEscapeAnalysis, false, \ 523 "Print the results of escape analysis") \ 524 \ 525 product(bool, EliminateAllocations, true, \ 526 "Use escape analysis to eliminate allocations") \ 527 \ 528 notproduct(bool, PrintEliminateAllocations, false, \ 529 "Print out when allocations are eliminated") \ 530 \ 531 product(intx, EliminateAllocationArraySizeLimit, 64, \ 532 "Array size (number of elements) limit for scalar replacement") \ 533 range(0, max_jint) \ 534 \ 535 product(bool, OptimizePtrCompare, true, \ 536 "Use escape analysis to optimize pointers compare") \ 537 \ 538 notproduct(bool, PrintOptimizePtrCompare, false, \ 539 "Print information about optimized pointers compare") \ 540 \ 541 notproduct(bool, VerifyConnectionGraph , true, \ 542 "Verify Connection Graph construction in Escape Analysis") \ 543 \ 544 product(bool, UseOptoBiasInlining, true, \ 545 "Generate biased locking code in C2 ideal graph") \ 546 \ 547 product(bool, OptimizeStringConcat, true, \ 548 "Optimize the construction of Strings by StringBuilder") \ 549 \ 550 notproduct(bool, PrintOptimizeStringConcat, false, \ 551 "Print information about transformations performed on Strings") \ 552 \ 553 product(intx, ValueSearchLimit, 1000, \ 554 "Recursion limit in PhaseMacroExpand::value_from_mem_phi") \ 555 range(0, max_jint) \ 556 \ 557 product(intx, MaxLabelRootDepth, 1100, \ 558 "Maximum times call Label_Root to prevent stack overflow") \ 559 range(100, max_jint) \ 560 \ 561 diagnostic(intx, DominatorSearchLimit, 1000, \ 562 "Iterations limit in Node::dominates") \ 563 range(0, max_jint) \ 564 \ 565 product(bool, BlockLayoutByFrequency, true, \ 566 "Use edge frequencies to drive block ordering") \ 567 \ 568 product(intx, BlockLayoutMinDiamondPercentage, 20, \ 569 "Miniumum %% of a successor (predecessor) for which block " \ 570 "layout a will allow a fork (join) in a single chain") \ 571 range(0, 100) \ 572 \ 573 product(bool, BlockLayoutRotateLoops, true, \ 574 "Allow back branches to be fall throughs in the block layout") \ 575 \ 576 diagnostic(bool, InlineReflectionGetCallerClass, true, \ 577 "inline sun.reflect.Reflection.getCallerClass(), known to be " \ 578 "part of base library DLL") \ 579 \ 580 diagnostic(bool, InlineObjectCopy, true, \ 581 "inline Object.clone and Arrays.copyOf[Range] intrinsics") \ 582 \ 583 diagnostic(bool, SpecialStringCompareTo, true, \ 584 "special version of string compareTo") \ 585 \ 586 diagnostic(bool, SpecialStringIndexOf, true, \ 587 "special version of string indexOf") \ 588 \ 589 diagnostic(bool, SpecialStringEquals, true, \ 590 "special version of string equals") \ 591 \ 592 diagnostic(bool, SpecialArraysEquals, true, \ 593 "special version of Arrays.equals(char[],char[])") \ 594 \ 595 diagnostic(bool, SpecialEncodeISOArray, true, \ 596 "special version of ISO_8859_1$Encoder.encodeISOArray") \ 597 \ 598 develop(bool, BailoutToInterpreterForThrows, false, \ 599 "Compiled methods which throws/catches exceptions will be " \ 600 "deopt and intp.") \ 601 \ 602 develop(bool, ConvertCmpD2CmpF, true, \ 603 "Convert cmpD to cmpF when one input is constant in float range") \ 604 \ 605 develop(bool, ConvertFloat2IntClipping, true, \ 606 "Convert float2int clipping idiom to integer clipping") \ 607 \ 608 develop(bool, Use24BitFPMode, true, \ 609 "Set 24-bit FPU mode on a per-compile basis ") \ 610 \ 611 develop(bool, Use24BitFP, true, \ 612 "use FP instructions that produce 24-bit precise results") \ 613 \ 614 develop(bool, MonomorphicArrayCheck, true, \ 615 "Uncommon-trap array store checks that require full type check") \ 616 \ 617 notproduct(bool, TracePhaseCCP, false, \ 618 "Print progress during Conditional Constant Propagation") \ 619 \ 620 develop(bool, PrintDominators, false, \ 621 "Print out dominator trees for GVN") \ 622 \ 623 diagnostic(bool, TraceSpilling, false, \ 624 "Trace spilling") \ 625 \ 626 diagnostic(bool, TraceTypeProfile, false, \ 627 "Trace type profile") \ 628 \ 629 develop(bool, PoisonOSREntry, true, \ 630 "Detect abnormal calls to OSR code") \ 631 \ 632 develop(bool, SoftMatchFailure, trueInProduct, \ 633 "If the DFA fails to match a node, print a message and bail out") \ 634 \ 635 develop(bool, InlineAccessors, true, \ 636 "inline accessor methods (get/set)") \ 637 \ 638 product(intx, TypeProfileMajorReceiverPercent, 90, \ 639 "% of major receiver type to all profiled receivers") \ 640 range(0, 100) \ 641 \ 642 diagnostic(bool, PrintIntrinsics, false, \ 643 "prints attempted and successful inlining of intrinsics") \ 644 \ 645 develop(bool, StressReflectiveCode, false, \ 646 "Use inexact types at allocations, etc., to test reflection") \ 647 \ 648 diagnostic(bool, DebugInlinedCalls, true, \ 649 "If false, restricts profiled locations to the root method only") \ 650 \ 651 notproduct(bool, VerifyLoopOptimizations, false, \ 652 "verify major loop optimizations") \ 653 \ 654 diagnostic(bool, ProfileDynamicTypes, true, \ 655 "do extra type profiling and use it more aggressively") \ 656 \ 657 develop(bool, TraceIterativeGVN, false, \ 658 "Print progress during Iterative Global Value Numbering") \ 659 \ 660 develop(bool, VerifyIterativeGVN, false, \ 661 "Verify Def-Use modifications during sparse Iterative Global " \ 662 "Value Numbering") \ 663 \ 664 notproduct(bool, TraceCISCSpill, false, \ 665 "Trace allocators use of cisc spillable instructions") \ 666 \ 667 product(bool, SplitIfBlocks, true, \ 668 "Clone compares and control flow through merge points to fold " \ 669 "some branches") \ 670 \ 671 develop(intx, FreqCountInvocations, 1, \ 672 "Scaling factor for branch frequencies (deprecated)") \ 673 range(1, max_intx) \ 674 \ 675 product(intx, AliasLevel, 3, \ 676 "0 for no aliasing, 1 for oop/field/static/array split, " \ 677 "2 for class split, 3 for unique instances") \ 678 range(0, 3) \ 679 constraint(AliasLevelConstraintFunc,AfterErgo) \ 680 \ 681 develop(bool, VerifyAliases, false, \ 682 "perform extra checks on the results of alias analysis") \ 683 \ 684 product(bool, IncrementalInline, true, \ 685 "do post parse inlining") \ 686 \ 687 develop(bool, AlwaysIncrementalInline, false, \ 688 "do all inlining incrementally") \ 689 \ 690 product(intx, LiveNodeCountInliningCutoff, 40000, \ 691 "max number of live nodes in a method") \ 692 range(0, max_juint / 8) \ 693 \ 694 diagnostic(bool, OptimizeExpensiveOps, true, \ 695 "Find best control for expensive operations") \ 696 \ 697 diagnostic(bool, UseMathExactIntrinsics, true, \ 698 "Enables intrinsification of various java.lang.Math functions") \ 699 \ 700 diagnostic(bool, UseMultiplyToLenIntrinsic, false, \ 701 "Enables intrinsification of BigInteger.multiplyToLen()") \ 702 \ 703 diagnostic(bool, UseSquareToLenIntrinsic, false, \ 704 "Enables intrinsification of BigInteger.squareToLen()") \ 705 \ 706 diagnostic(bool, UseMulAddIntrinsic, false, \ 707 "Enables intrinsification of BigInteger.mulAdd()") \ 708 \ 709 diagnostic(bool, UseMontgomeryMultiplyIntrinsic, false, \ 710 "Enables intrinsification of BigInteger.montgomeryMultiply()") \ 711 \ 712 diagnostic(bool, UseMontgomerySquareIntrinsic, false, \ 713 "Enables intrinsification of BigInteger.montgomerySquare()") \ 714 \ 715 product(bool, UseTypeSpeculation, true, \ 716 "Speculatively propagate types from profiles") \ 717 \ 718 diagnostic(bool, UseInlineDepthForSpeculativeTypes, true, \ 719 "Carry inline depth of profile point with speculative type " \ 720 "and give priority to profiling from lower inline depth") \ 721 \ 722 product_pd(bool, TrapBasedRangeChecks, \ 723 "Generate code for range checks that uses a cmp and trap " \ 724 "instruction raising SIGTRAP. Used on PPC64.") \ 725 \ 726 product(intx, ArrayCopyLoadStoreMaxElem, 8, \ 727 "Maximum number of arraycopy elements inlined as a sequence of" \ 728 "loads/stores") \ 729 range(0, max_intx) \ 730 \ 731 develop(bool, StressArrayCopyMacroNode, false, \ 732 "Perform ArrayCopy load/store replacement during IGVN only") \ 733 \ 734 develop(bool, RenumberLiveNodes, true, \ 735 "Renumber live nodes") \ 736 737 C2_FLAGS(DECLARE_DEVELOPER_FLAG, \ 738 DECLARE_PD_DEVELOPER_FLAG, \ 739 DECLARE_PRODUCT_FLAG, \ 740 DECLARE_PD_PRODUCT_FLAG, \ 741 DECLARE_DIAGNOSTIC_FLAG, \ 742 DECLARE_PD_DIAGNOSTIC_FLAG, \ 743 DECLARE_EXPERIMENTAL_FLAG, \ 744 DECLARE_NOTPRODUCT_FLAG, \ 745 IGNORE_RANGE, \ 746 IGNORE_CONSTRAINT, \ 747 IGNORE_WRITEABLE) 748 749 #endif // SHARE_VM_OPTO_C2_GLOBALS_HPP