1; Parameter options of the compiler. 2 3; Copyright (C) 2019-2020 Free Software Foundation, Inc. 4; 5; This file is part of GCC. 6; 7; GCC is free software; you can redistribute it and/or modify it under 8; the terms of the GNU General Public License as published by the Free 9; Software Foundation; either version 3, or (at your option) any later 10; version. 11; 12; GCC is distributed in the hope that it will be useful, but WITHOUT ANY 13; WARRANTY; without even the implied warranty of MERCHANTABILITY or 14; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15; for more details. 16; 17; You should have received a copy of the GNU General Public License 18; along with GCC; see the file COPYING3. If not see 19; <http://www.gnu.org/licenses/>. 20 21; See the GCC internals manual (options.texi) for a description of this file's format. 22 23; Please try to keep this file in ASCII collating order. 24 25-param=align-loop-iterations= 26Common Joined UInteger Var(param_align_loop_iterations) Init(4) Param Optimization 27Loops iterating at least selected number of iterations will get loop alignment. 28 29-param=align-threshold= 30Common Joined UInteger Var(param_align_threshold) Init(100) IntegerRange(1, 65536) Param Optimization 31Select fraction of the maximal frequency of executions of basic block in function given basic block get alignment. 32 33-param=asan-globals= 34Common Joined UInteger Var(param_asan_globals) Init(1) IntegerRange(0, 1) Param 35Enable asan globals protection. 36 37-param=asan-instrument-allocas= 38Common Joined UInteger Var(param_asan_protect_allocas) Init(1) IntegerRange(0, 1) Param Optimization 39Enable asan allocas/VLAs protection. 40 41-param=asan-instrument-reads= 42Common Joined UInteger Var(param_asan_instrument_reads) Init(1) IntegerRange(0, 1) Param Optimization 43Enable asan load operations protection. 44 45-param=asan-instrument-writes= 46Common Joined UInteger Var(param_asan_instrument_writes) Init(1) IntegerRange(0, 1) Param Optimization 47Enable asan store operations protection. 48 49-param=asan-instrumentation-with-call-threshold= 50Common Joined UInteger Var(param_asan_instrumentation_with_call_threshold) Init(7000) Param Optimization 51Use callbacks instead of inline code if number of accesses in function becomes greater or equal to this number. 52 53-param=asan-memintrin= 54Common Joined UInteger Var(param_asan_memintrin) Init(1) IntegerRange(0, 1) Param Optimization 55Enable asan builtin functions protection. 56 57-param=asan-stack= 58Common Joined UInteger Var(param_asan_stack) Init(1) IntegerRange(0, 1) Param Optimization 59Enable asan stack protection. 60 61-param=asan-use-after-return= 62Common Joined UInteger Var(param_asan_use_after_return) Init(1) IntegerRange(0, 1) Param Optimization 63Enable asan detection of use-after-return bugs. 64 65-param=avg-loop-niter= 66Common Joined UInteger Var(param_avg_loop_niter) Init(10) IntegerRange(1, 65536) Param Optimization 67Average number of iterations of a loop. 68 69-param=avoid-fma-max-bits= 70Common Joined UInteger Var(param_avoid_fma_max_bits) IntegerRange(0, 512) Param Optimization 71Maximum number of bits for which we avoid creating FMAs. 72 73-param=builtin-expect-probability= 74Common Joined UInteger Var(param_builtin_expect_probability) Init(90) IntegerRange(0, 100) Param Optimization 75Set the estimated probability in percentage for builtin expect. The default value is 90% probability. 76 77-param=builtin-string-cmp-inline-length= 78Common Joined UInteger Var(param_builtin_string_cmp_inline_length) Init(3) IntegerRange(0, 100) Param Optimization 79The maximum length of a constant string for a builtin string cmp call eligible for inlining. The default value is 3. 80 81-param=case-values-threshold= 82Common Joined UInteger Var(param_case_values_threshold) Param Optimization 83The smallest number of different values for which it is best to use a jump-table instead of a tree of conditional branches, if 0, use the default for the machine. 84 85-param=comdat-sharing-probability= 86Common Joined UInteger Var(param_comdat_sharing_probability) Init(20) Param Optimization 87Probability that COMDAT function will be shared with different compilation unit. 88 89-param=cxx-max-namespaces-for-diagnostic-help= 90Common Joined UInteger Var(param_cxx_max_namespaces_for_diagnostic_help) Init(1000) Param 91Maximum number of namespaces to search for alternatives when name lookup fails. 92 93-param=dse-max-alias-queries-per-store= 94Common Joined UInteger Var(param_dse_max_alias_queries_per_store) Init(256) Param Optimization 95Maximum number of queries into the alias oracle per store. 96 97-param=dse-max-object-size= 98Common Joined UInteger Var(param_dse_max_object_size) Init(256) Param Optimization 99Maximum size (in bytes) of objects tracked bytewise by dead store elimination. 100 101-param=early-inlining-insns= 102Common Joined UInteger Var(param_early_inlining_insns) Init(6) Optimization Param 103Maximal estimated growth of function body caused by early inlining of single call. 104 105-param=fsm-maximum-phi-arguments= 106Common Joined UInteger Var(param_fsm_maximum_phi_arguments) Init(100) IntegerRange(1, 999999) Param Optimization 107Maximum number of arguments a PHI may have before the FSM threader will not try to thread through its block. 108 109-param=fsm-scale-path-blocks= 110Common Joined UInteger Var(param_fsm_scale_path_blocks) Init(3) IntegerRange(1, 10) Param Optimization 111Scale factor to apply to the number of blocks in a threading path when comparing to the number of (scaled) statements. 112 113-param=fsm-scale-path-stmts= 114Common Joined UInteger Var(param_fsm_scale_path_stmts) Init(2) IntegerRange(1, 10) Param Optimization 115Scale factor to apply to the number of statements in a threading path when comparing to the number of (scaled) blocks. 116 117-param=gcse-after-reload-critical-fraction= 118Common Joined UInteger Var(param_gcse_after_reload_critical_fraction) Init(10) Param Optimization 119The threshold ratio of critical edges execution count that permit performing redundancy elimination after reload. 120 121-param=gcse-after-reload-partial-fraction= 122Common Joined UInteger Var(param_gcse_after_reload_partial_fraction) Init(3) Param Optimization 123The threshold ratio for performing partial redundancy elimination after reload. 124 125-param=gcse-cost-distance-ratio= 126Common Joined UInteger Var(param_gcse_cost_distance_ratio) Init(10) Param Optimization 127Scaling factor in calculation of maximum distance an expression can be moved by GCSE optimizations. 128 129-param=gcse-unrestricted-cost= 130Common Joined UInteger Var(param_gcse_unrestricted_cost) Init(3) Param Optimization 131Cost at which GCSE optimizations will not constraint the distance an expression can travel. 132 133-param=ggc-min-expand= 134Common Joined UInteger Var(param_ggc_min_expand) Init(30) Param 135Minimum heap expansion to trigger garbage collection, as a percentage of the total size of the heap. 136 137-param=ggc-min-heapsize= 138Common Joined UInteger Var(param_ggc_min_heapsize) Init(4096) Param 139Minimum heap size before we start collecting garbage, in kilobytes. 140 141-param=gimple-fe-computed-hot-bb-threshold= 142Common Joined UInteger Var(param_gimple_fe_computed_hot_bb_threshold) Param 143The number of executions of a basic block which is considered hot. The parameter is used only in GIMPLE FE. 144 145-param=graphite-allow-codegen-errors= 146Common Joined UInteger Var(param_graphite_allow_codegen_errors) IntegerRange(0, 1) Param 147Whether codegen errors should be ICEs when -fchecking. 148 149-param=graphite-max-arrays-per-scop= 150Common Joined UInteger Var(param_graphite_max_arrays_per_scop) Init(100) Param Optimization 151Maximum number of arrays per SCoP. 152 153-param=graphite-max-nb-scop-params= 154Common Joined UInteger Var(param_graphite_max_nb_scop_params) Init(10) Param Optimization 155Maximum number of parameters in a SCoP. 156 157-param=hash-table-verification-limit= 158Common Joined UInteger Var(param_hash_table_verification_limit) Init(10) Param 159The number of elements for which hash table verification is done for each searched element. 160 161-param=hot-bb-count-fraction= 162Common Joined UInteger Var(param_hot_bb_count_fraction) Init(10000) Param 163The denominator n of fraction 1/n of the maximal execution count of a basic block in the entire program that a basic block needs to at least have in order to be considered hot (used in non-LTO mode). 164 165-param=hot-bb-count-ws-permille= 166Common Joined UInteger Var(param_hot_bb_count_ws_permille) Init(990) IntegerRange(0, 1000) Param 167The number of most executed permilles of the profiled execution of the entire program to which the execution count of a basic block must be part of in order to be considered hot (used in LTO mode). 168 169-param=hot-bb-frequency-fraction= 170Common Joined UInteger Var(param_hot_bb_frequency_fraction) Init(1000) Param 171The denominator n of fraction 1/n of the execution frequency of the entry block of a function that a basic block of this function needs to at least have in order to be considered hot. 172 173-param=hsa-gen-debug-stores= 174Common Joined UInteger Var(param_hsa_gen_debug_stores) IntegerRange(0, 1) Param 175Level of hsa debug stores verbosity. 176 177-param=inline-heuristics-hint-percent= 178Common Joined UInteger Var(param_inline_heuristics_hint_percent) Init(200) Optimization IntegerRange(100, 1000000) Param 179The scale (in percents) applied to inline-insns-single and auto limits when heuristics hints that inlining is very profitable. 180 181-param=inline-min-speedup= 182Common Joined UInteger Var(param_inline_min_speedup) Init(30) Optimization IntegerRange(0, 100) Param 183The minimal estimated speedup allowing inliner to ignore inline-insns-single and inline-insns-auto. 184 185-param=inline-unit-growth= 186Common Joined UInteger Var(param_inline_unit_growth) Init(40) Optimization Param 187How much can given compilation unit grow because of the inlining (in percent). 188 189-param=integer-share-limit= 190Common Joined UInteger Var(param_integer_share_limit) Init(251) IntegerRange(2, 65536) Param 191The upper bound for sharing integer constants. 192 193-param=ipa-cp-eval-threshold= 194Common Joined UInteger Var(param_ipa_cp_eval_threshold) Init(500) Param Optimization 195Threshold ipa-cp opportunity evaluation that is still considered beneficial to clone. 196 197-param=ipa-cp-loop-hint-bonus= 198Common Joined UInteger Var(param_ipa_cp_loop_hint_bonus) Init(64) Param Optimization 199Compile-time bonus IPA-CP assigns to candidates which make loop bounds or strides known. 200 201-param=ipa-cp-max-recursive-depth= 202Common Joined UInteger Var(param_ipa_cp_max_recursive_depth) Init(8) Param Optimization 203Maximum depth of recursive cloning for self-recursive function. 204 205-param=ipa-cp-min-recursive-probability= 206Common Joined UInteger Var(param_ipa_cp_min_recursive_probability) Init(2) Param Optimization 207Recursive cloning only when the probability of call being executed exceeds the parameter. 208 209-param=ipa-cp-recursion-penalty= 210Common Joined UInteger Var(param_ipa_cp_recursion_penalty) Init(40) IntegerRange(0, 100) Param Optimization 211Percentage penalty the recursive functions will receive when they are evaluated for cloning. 212 213-param=ipa-cp-single-call-penalty= 214Common Joined UInteger Var(param_ipa_cp_single_call_penalty) Init(15) IntegerRange(0, 100) Param Optimization 215Percentage penalty functions containing a single call to another function will receive when they are evaluated for cloning. 216 217-param=ipa-cp-unit-growth= 218Common Joined UInteger Var(param_ipa_cp_unit_growth) Init(10) Param Optimization 219How much can given compilation unit grow because of the interprocedural constant propagation (in percent). 220 221-param=ipa-cp-value-list-size= 222Common Joined UInteger Var(param_ipa_cp_value_list_size) Init(8) Param Optimization 223Maximum size of a list of values associated with each parameter for interprocedural constant propagation. 224 225-param=ipa-max-aa-steps= 226Common Joined UInteger Var(param_ipa_max_aa_steps) Init(25000) Param Optimization 227Maximum number of statements that will be visited by IPA formal parameter analysis based on alias analysis in any given function. 228 229-param=ipa-max-agg-items= 230Common Joined UInteger Var(param_ipa_max_agg_items) Init(16) Param Optimization 231Maximum number of aggregate content items for a parameter in jump functions and lattices. 232 233-param=ipa-max-param-expr-ops= 234Common Joined UInteger Var(param_ipa_max_param_expr_ops) Init(10) Param Optimization 235Maximum number of operations in a parameter expression that can be handled by IPA analysis. 236 237-param=ipa-max-switch-predicate-bounds= 238Common Joined UInteger Var(param_ipa_max_switch_predicate_bounds) Init(5) Param Optimization 239Maximal number of boundary endpoints of case ranges of switch statement used during IPA function summary generation. 240 241-param=ipa-sra-max-replacements= 242Common Joined UInteger Var(param_ipa_sra_max_replacements) Optimization Init(8) IntegerRange(0, 16) Param 243Maximum pieces that IPA-SRA tracks per formal parameter, as a consequence, also the maximum number of replacements of a formal parameter. 244 245-param=ipa-sra-ptr-growth-factor= 246Common Joined UInteger Var(param_ipa_sra_ptr_growth_factor) Init(2) Param Optimization 247Maximum allowed growth of number and total size of new parameters that ipa-sra replaces a pointer to an aggregate with. 248 249-param=ira-loop-reserved-regs= 250Common Joined UInteger Var(param_ira_loop_reserved_regs) Init(2) Param Optimization 251The number of registers in each class kept unused by loop invariant motion. 252 253-param=ira-max-conflict-table-size= 254Common Joined UInteger Var(param_ira_max_conflict_table_size) Init(1000) Param Optimization 255Max size of conflict table in MB. 256 257-param=ira-max-loops-num= 258Common Joined UInteger Var(param_ira_max_loops_num) Init(100) Param Optimization 259Max loops number for regional RA. 260 261-param=iv-always-prune-cand-set-bound= 262Common Joined UInteger Var(param_iv_always_prune_cand_set_bound) Init(10) Param Optimization 263If number of candidates in the set is smaller, we always try to remove unused ivs during its optimization. 264 265-param=iv-consider-all-candidates-bound= 266Common Joined UInteger Var(param_iv_consider_all_candidates_bound) Init(40) Param Optimization 267Bound on number of candidates below that all candidates are considered in iv optimizations. 268 269-param=iv-max-considered-uses= 270Common Joined UInteger Var(param_iv_max_considered_uses) Init(250) Param Optimization 271Bound on number of iv uses in loop optimized in iv optimizations. 272 273-param=jump-table-max-growth-ratio-for-size= 274Common Joined UInteger Var(param_jump_table_max_growth_ratio_for_size) Init(300) Param Optimization 275The maximum code size growth ratio when expanding into a jump table (in percent). The parameter is used when optimizing for size. 276 277-param=jump-table-max-growth-ratio-for-speed= 278Common Joined UInteger Var(param_jump_table_max_growth_ratio_for_speed) Init(800) Param Optimization 279The maximum code size growth ratio when expanding into a jump table (in percent). The parameter is used when optimizing for speed. 280 281-param=l1-cache-line-size= 282Common Joined UInteger Var(param_l1_cache_line_size) Init(32) Param Optimization 283The size of L1 cache line. 284 285-param=l1-cache-size= 286Common Joined UInteger Var(param_l1_cache_size) Init(64) Param Optimization 287The size of L1 cache. 288 289-param=l2-cache-size= 290Common Joined UInteger Var(param_l2_cache_size) Init(512) Param Optimization 291The size of L2 cache. 292 293-param=large-function-growth= 294Common Joined UInteger Var(param_large_function_growth) Optimization Init(100) Param 295Maximal growth due to inlining of large function (in percent). 296 297-param=large-function-insns= 298Common Joined UInteger Var(param_large_function_insns) Optimization Init(2700) Param 299The size of function body to be considered large. 300 301-param=large-stack-frame= 302Common Joined UInteger Var(param_large_stack_frame) Init(256) Optimization Param 303The size of stack frame to be considered large. 304 305-param=large-stack-frame-growth= 306Common Joined UInteger Var(param_stack_frame_growth) Optimization Init(1000) Param 307Maximal stack frame growth due to inlining (in percent). 308 309-param=large-unit-insns= 310Common Joined UInteger Var(param_large_unit_insns) Optimization Init(10000) Param 311The size of translation unit to be considered large. 312 313-param=lim-expensive= 314Common Joined UInteger Var(param_lim_expensive) Init(20) Param Optimization 315The minimum cost of an expensive expression in the loop invariant motion. 316 317-param=logical-op-non-short-circuit= 318Common Joined UInteger Var(param_logical_op_non_short_circuit) Init(-1) IntegerRange(-1, 1) Param 319True if a non-short-circuit operation is optimal. 320 321-param=loop-block-tile-size= 322Common Joined UInteger Var(param_loop_block_tile_size) Init(51) Param Optimization 323Size of tiles for loop blocking. 324 325-param=loop-interchange-max-num-stmts= 326Common Joined UInteger Var(param_loop_interchange_max_num_stmts) Init(64) Param Optimization 327The maximum number of stmts in loop nest for loop interchange. 328 329-param=loop-interchange-stride-ratio= 330Common Joined UInteger Var(param_loop_interchange_stride_ratio) Init(2) Param Optimization 331The minimum stride ratio for loop interchange to be profitable. 332 333-param=loop-invariant-max-bbs-in-loop= 334Common Joined UInteger Var(param_loop_invariant_max_bbs_in_loop) Init(10000) Param Optimization 335Max basic blocks number in loop for loop invariant motion. 336 337-param=loop-max-datarefs-for-datadeps= 338Common Joined UInteger Var(param_loop_max_datarefs_for_datadeps) Init(1000) Param Optimization 339Maximum number of datarefs in loop for building loop data dependencies. 340 341-param=loop-versioning-max-inner-insns= 342Common Joined UInteger Var(param_loop_versioning_max_inner_insns) Init(200) Param Optimization 343The maximum number of instructions in an inner loop that is being considered for versioning. 344 345-param=loop-versioning-max-outer-insns= 346Common Joined UInteger Var(param_loop_versioning_max_outer_insns) Init(100) Param Optimization 347The maximum number of instructions in an outer loop that is being considered for versioning, on top of the instructions in inner loops. 348 349-param=lra-inheritance-ebb-probability-cutoff= 350Common Joined UInteger Var(param_lra_inheritance_ebb_probability_cutoff) Init(40) IntegerRange(0, 100) Param Optimization 351Minimal fall-through edge probability in percentage used to add BB to inheritance EBB in LRA. 352 353-param=lra-max-considered-reload-pseudos= 354Common Joined UInteger Var(param_lra_max_considered_reload_pseudos) Init(500) Param Optimization 355The max number of reload pseudos which are considered during spilling a non-reload pseudo. 356 357-param=lto-max-partition= 358Common Joined UInteger Var(param_max_partition_size) Init(1000000) Param 359Maximal size of a partition for LTO (in estimated instructions). 360 361-param=lto-max-streaming-parallelism= 362Common Joined UInteger Var(param_max_lto_streaming_parallelism) Init(32) IntegerRange(1, 65536) Param 363maximal number of LTO partitions streamed in parallel. 364 365-param=lto-min-partition= 366Common Joined UInteger Var(param_min_partition_size) Init(10000) Param 367Minimal size of a partition for LTO (in estimated instructions). 368 369-param=lto-partitions= 370Common Joined UInteger Var(param_lto_partitions) Init(128) IntegerRange(1, 65536) Param 371Number of partitions the program should be split to. 372 373-param=max-average-unrolled-insns= 374Common Joined UInteger Var(param_max_average_unrolled_insns) Init(80) Param Optimization 375The maximum number of instructions to consider to unroll in a loop on average. 376 377-param=max-combine-insns= 378Common Joined UInteger Var(param_max_combine_insns) Init(4) IntegerRange(2, 4) Param Optimization 379The maximum number of insns combine tries to combine. 380 381-param=max-completely-peel-loop-nest-depth= 382Common Joined UInteger Var(param_max_unroll_iterations) Init(8) Param Optimization 383The maximum depth of a loop nest we completely peel. 384 385-param=max-completely-peel-times= 386Common Joined UInteger Var(param_max_completely_peel_times) Init(16) Param Optimization 387The maximum number of peelings of a single loop that is peeled completely. 388 389-param=max-completely-peeled-insns= 390Common Joined UInteger Var(param_max_completely_peeled_insns) Init(200) Param Optimization 391The maximum number of insns of a completely peeled loop. 392 393-param=max-crossjump-edges= 394Common Joined UInteger Var(param_max_crossjump_edges) Init(100) Param Optimization 395The maximum number of incoming edges to consider for crossjumping. 396 397-param=max-cse-insns= 398Common Joined UInteger Var(param_max_cse_insns) Init(1000) Param Optimization 399The maximum instructions CSE process before flushing. 400 401-param=max-cse-path-length= 402Common Joined UInteger Var(param_max_cse_path_length) Init(10) IntegerRange(1, 65536) Param Optimization 403The maximum length of path considered in cse. 404 405-param=max-cselib-memory-locations= 406Common Joined UInteger Var(param_max_cselib_memory_locations) Init(500) Param Optimization 407The maximum memory locations recorded by cselib. 408 409-param=max-debug-marker-count= 410Common Joined UInteger Var(param_max_debug_marker_count) Init(100000) Param Optimization 411Max. count of debug markers to expand or inline. 412 413-param=max-delay-slot-insn-search= 414Common Joined UInteger Var(param_max_delay_slot_insn_search) Init(100) Param Optimization 415The maximum number of instructions to consider to fill a delay slot. 416 417-param=max-delay-slot-live-search= 418Common Joined UInteger Var(param_max_delay_slot_live_search) Init(333) Param Optimization 419The maximum number of instructions to consider to find accurate live register information. 420 421-param=max-dse-active-local-stores= 422Common Joined UInteger Var(param_max_dse_active_local_stores) Init(5000) Param Optimization 423Maximum number of active local stores in RTL dead store elimination. 424 425-param=max-early-inliner-iterations= 426Common Joined UInteger Var(param_early_inliner_max_iterations) Init(1) Param Optimization 427The maximum number of nested indirect inlining performed by early inliner. 428 429-param=max-fields-for-field-sensitive= 430Common Joined UInteger Var(param_max_fields_for_field_sensitive) Param 431Maximum number of fields in a structure before pointer analysis treats the structure as a single variable. 432 433-param=max-fsm-thread-length= 434Common Joined UInteger Var(param_max_fsm_thread_length) Init(10) IntegerRange(1, 999999) Param Optimization 435Maximum number of basic blocks on a finite state automaton jump thread path. 436 437-param=max-fsm-thread-path-insns= 438Common Joined UInteger Var(param_max_fsm_thread_path_insns) Init(100) IntegerRange(1, 999999) Param Optimization 439Maximum number of instructions to copy when duplicating blocks on a finite state automaton jump thread path. 440 441-param=max-fsm-thread-paths= 442Common Joined UInteger Var(param_max_fsm_thread_paths) Init(50) IntegerRange(1, 999999) Param Optimization 443Maximum number of new jump thread paths to create for a finite state automaton. 444 445-param=max-gcse-insertion-ratio= 446Common Joined UInteger Var(param_max_gcse_insertion_ratio) Init(20) Param Optimization 447The maximum ratio of insertions to deletions of expressions in GCSE. 448 449-param=max-gcse-memory= 450Common Joined UInteger Var(param_max_gcse_memory) Init(134217728) Param Optimization 451The maximum amount of memory to be allocated by GCSE. 452 453-param=max-goto-duplication-insns= 454Common Joined UInteger Var(param_max_goto_duplication_insns) Init(8) Param Optimization 455The maximum number of insns to duplicate when unfactoring computed gotos. 456 457-param=max-grow-copy-bb-insns= 458Common Joined UInteger Var(param_max_grow_copy_bb_insns) Init(8) Param Optimization 459The maximum expansion factor when copying basic blocks. 460 461-param=max-hoist-depth= 462Common Joined UInteger Var(param_max_hoist_depth) Init(30) Param Optimization 463Maximum depth of search in the dominator tree for expressions to hoist. 464 465-param=max-inline-insns-auto= 466Common Joined UInteger Var(param_max_inline_insns_auto) Init(15) Optimization Param 467The maximum number of instructions when automatically inlining. 468 469-param=max-inline-insns-recursive= 470Common Joined UInteger Var(param_max_inline_insns_recursive) Optimization Init(450) Param 471The maximum number of instructions inline function can grow to via recursive inlining. 472 473-param=max-inline-insns-recursive-auto= 474Common Joined UInteger Var(param_max_inline_insns_recursive_auto) Optimization Init(450) Param 475The maximum number of instructions non-inline function can grow to via recursive inlining. 476 477-param=max-inline-insns-single= 478Common Joined UInteger Var(param_max_inline_insns_single) Optimization Init(70) Param 479The maximum number of instructions in a single function eligible for inlining. 480 481-param=max-inline-insns-size= 482Common Joined UInteger Var(param_max_inline_insns_size) Optimization Param 483The maximum number of instructions when inlining for size. 484 485-param=max-inline-insns-small= 486Common Joined UInteger Var(param_max_inline_insns_small) Optimization Param 487The maximum number of instructions when automatically inlining small functions. 488 489-param=max-inline-recursive-depth= 490Common Joined UInteger Var(param_max_inline_recursive_depth) Optimization Init(8) Param 491The maximum depth of recursive inlining for inline functions. 492 493-param=max-inline-recursive-depth-auto= 494Common Joined UInteger Var(param_max_inline_recursive_depth_auto) Optimization Init(8) Param 495The maximum depth of recursive inlining for non-inline functions. 496 497-param=max-isl-operations= 498Common Joined UInteger Var(param_max_isl_operations) Init(350000) Param Optimization 499Maximum number of isl operations, 0 means unlimited. 500 501-param=max-iterations-computation-cost= 502Common Joined UInteger Var(param_max_iterations_computation_cost) Init(10) Param Optimization 503Bound on the cost of an expression to compute the number of iterations. 504 505-param=max-iterations-to-track= 506Common Joined UInteger Var(param_max_iterations_to_track) Init(1000) Param Optimization 507Bound on the number of iterations the brute force # of iterations analysis algorithm evaluates. 508 509-param=max-jump-thread-duplication-stmts= 510Common Joined UInteger Var(param_max_jump_thread_duplication_stmts) Init(15) Param Optimization 511Maximum number of statements allowed in a block that needs to be duplicated when threading jumps. 512 513-param=max-last-value-rtl= 514Common Joined UInteger Var(param_max_last_value_rtl) Init(10000) Param Optimization 515The maximum number of RTL nodes that can be recorded as combiner's last value. 516 517-param=max-loop-header-insns= 518Common Joined UInteger Var(param_max_loop_header_insns) Init(20) Param Optimization 519The maximum number of insns in loop header duplicated by the copy loop headers pass. 520 521-param=max-modulo-backtrack-attempts= 522Common Joined UInteger Var(param_max_modulo_backtrack_attempts) Init(40) Param Optimization 523The maximum number of backtrack attempts the scheduler should make when modulo scheduling a loop. 524 525-param=max-partial-antic-length= 526Common Joined UInteger Var(param_max_partial_antic_length) Init(100) Param Optimization 527Maximum length of partial antic set when performing tree pre optimization. 528 529-param=max-peel-branches= 530Common Joined UInteger Var(param_max_peel_branches) Init(32) Param Optimization 531The maximum number of branches on the path through the peeled sequence. 532 533-param=max-peel-times= 534Common Joined UInteger Var(param_max_peel_times) Init(16) Param Optimization 535The maximum number of peelings of a single loop. 536 537-param=max-peeled-insns= 538Common Joined UInteger Var(param_max_peeled_insns) Init(100) Param Optimization 539The maximum number of insns of a peeled loop. 540 541-param=max-pending-list-length= 542Common Joined UInteger Var(param_max_pending_list_length) Init(32) Param Optimization 543The maximum length of scheduling's pending operations list. 544 545-param=max-pipeline-region-blocks= 546Common Joined UInteger Var(param_max_pipeline_region_blocks) Init(15) Param Optimization 547The maximum number of blocks in a region to be considered for interblock scheduling. 548 549-param=max-pipeline-region-insns= 550Common Joined UInteger Var(param_max_pipeline_region_insns) Init(200) Param Optimization 551The maximum number of insns in a region to be considered for interblock scheduling. 552 553-param=max-pow-sqrt-depth= 554Common Joined UInteger Var(param_max_pow_sqrt_depth) Init(5) IntegerRange(1, 32) Param Optimization 555Maximum depth of sqrt chains to use when synthesizing exponentiation by a real constant. 556 557-param=max-predicted-iterations= 558Common Joined UInteger Var(param_max_predicted_iterations) Init(100) IntegerRange(0, 65536) Param Optimization 559The maximum number of loop iterations we predict statically. 560 561-param=max-reload-search-insns= 562Common Joined UInteger Var(param_max_reload_search_insns) Init(100) Param Optimization 563The maximum number of instructions to search backward when looking for equivalent reload. 564 565-param=max-rtl-if-conversion-insns= 566Common Joined UInteger Var(param_max_rtl_if_conversion_insns) Init(10) IntegerRange(0, 99) Param Optimization 567Maximum number of insns in a basic block to consider for RTL if-conversion. 568 569-param=max-rtl-if-conversion-predictable-cost= 570Common Joined UInteger Var(param_max_rtl_if_conversion_predictable_cost) Init(20) IntegerRange(0, 200) Param Optimization 571Maximum permissible cost for the sequence that would be generated by the RTL if-conversion pass for a branch that is considered predictable. 572 573-param=max-rtl-if-conversion-unpredictable-cost= 574Common Joined UInteger Var(param_max_rtl_if_conversion_unpredictable_cost) Init(40) IntegerRange(0, 200) Param Optimization 575Maximum permissible cost for the sequence that would be generated by the RTL if-conversion pass for a branch that is considered unpredictable. 576 577-param=max-sched-extend-regions-iters= 578Common Joined UInteger Var(param_max_sched_extend_regions_iters) Param Optimization 579The maximum number of iterations through CFG to extend regions. 580 581-param=max-sched-insn-conflict-delay= 582Common Joined UInteger Var(param_max_sched_insn_conflict_delay) Init(3) IntegerRange(1, 10) Param Optimization 583The maximum conflict delay for an insn to be considered for speculative motion. 584 585-param=max-sched-ready-insns= 586Common Joined UInteger Var(param_max_sched_ready_insns) Init(100) IntegerRange(1, 65536) Param Optimization 587The maximum number of instructions ready to be issued to be considered by the scheduler during the first scheduling pass. 588 589-param=max-sched-region-blocks= 590Common Joined UInteger Var(param_max_sched_region_blocks) Init(10) Param Optimization 591The maximum number of blocks in a region to be considered for interblock scheduling. 592 593-param=max-sched-region-insns= 594Common Joined UInteger Var(param_max_sched_region_insns) Init(100) Param Optimization 595The maximum number of insns in a region to be considered for interblock scheduling. 596 597-param=max-slsr-cand-scan= 598Common Joined UInteger Var(param_max_slsr_candidate_scan) Init(50) IntegerRange(1, 999999) Param Optimization 599Maximum length of candidate scans for straight-line strength reduction. 600 601-param=max-speculative-devirt-maydefs= 602Common Joined UInteger Var(param_max_speculative_devirt_maydefs) Init(50) Param Optimization 603Maximum number of may-defs visited when devirtualizing speculatively. 604 605-param=max-ssa-name-query-depth= 606Common Joined UInteger Var(param_max_ssa_name_query_depth) Init(3) IntegerRange(1, 10) Param 607Maximum recursion depth allowed when querying a property of an SSA name. 608 609-param=max-stores-to-merge= 610Common Joined UInteger Var(param_max_stores_to_merge) Init(64) IntegerRange(2, 65536) Param Optimization 611Maximum number of constant stores to merge in the store merging pass. 612 613-param=max-stores-to-sink= 614Common Joined UInteger Var(param_max_stores_to_sink) Init(2) Param Optimization 615Maximum number of conditional store pairs that can be sunk. 616 617-param=max-tail-merge-comparisons= 618Common Joined UInteger Var(param_max_tail_merge_comparisons) Init(10) Param Optimization 619Maximum amount of similar bbs to compare a bb with. 620 621-param=max-tail-merge-iterations= 622Common Joined UInteger Var(param_max_tail_merge_iterations) Init(2) Param Optimization 623Maximum amount of iterations of the pass over a function. 624 625-param=max-tracked-strlens= 626Common Joined UInteger Var(param_max_tracked_strlens) Init(10000) Param Optimization 627Maximum number of strings for which strlen optimization pass will track string lengths. 628 629-param=max-tree-if-conversion-phi-args= 630Common Joined UInteger Var(param_max_tree_if_conversion_phi_args) Init(4) IntegerRange(2, 65536) Param Optimization 631Maximum number of arguments in a PHI supported by TREE if-conversion unless the loop is marked with simd pragma. 632 633-param=max-unroll-times= 634Common Joined UInteger Var(param_max_unroll_times) Init(8) Param Optimization 635The maximum number of unrollings of a single loop. 636 637-param=max-unrolled-insns= 638Common Joined UInteger Var(param_max_unrolled_insns) Init(200) Param Optimization 639The maximum number of instructions to consider to unroll in a loop. 640 641-param=max-unswitch-insns= 642Common Joined UInteger Var(param_max_unswitch_insns) Init(50) Param Optimization 643The maximum number of insns of an unswitched loop. 644 645-param=max-unswitch-level= 646Common Joined UInteger Var(param_max_unswitch_level) Init(3) Param Optimization 647The maximum number of unswitchings in a single loop. 648 649-param=max-variable-expansions-in-unroller= 650Common Joined UInteger Var(param_max_variable_expansions) Init(1) Param Optimization 651If -fvariable-expansion-in-unroller is used, the maximum number of times that an individual variable will be expanded during loop unrolling. 652 653-param=max-vartrack-expr-depth= 654Common Joined UInteger Var(param_max_vartrack_expr_depth) Init(12) Param Optimization 655Max. recursion depth for expanding var tracking expressions. 656 657-param=max-vartrack-reverse-op-size= 658Common Joined UInteger Var(param_max_vartrack_reverse_op_size) Init(50) Param Optimization 659Max. size of loc list for which reverse ops should be added. 660 661-param=max-vartrack-size= 662Common Joined UInteger Var(param_max_vartrack_size) Init(50000000) Param Optimization 663Max. size of var tracking hash tables. 664 665-param=max-find-base-term-values= 666Common Joined UInteger Var(param_max_find_base_term_values) Init(200) Param Optimization 667Maximum number of VALUEs handled during a single find_base_term call. 668 669-param=max-vrp-switch-assertions= 670Common Joined UInteger Var(param_max_vrp_switch_assertions) Init(10) Param Optimization 671Maximum number of assertions to add along the default edge of a switch statement during VRP. 672 673-param=min-crossjump-insns= 674Common Joined UInteger Var(param_min_crossjump_insns) Init(5) IntegerRange(1, 65536) Param Optimization 675The minimum number of matching instructions to consider for crossjumping. 676 677-param=min-inline-recursive-probability= 678Common Joined UInteger Var(param_min_inline_recursive_probability) Init(10) Optimization Param 679Inline recursively only when the probability of call being executed exceeds the parameter. 680 681-param=min-insn-to-prefetch-ratio= 682Common Joined UInteger Var(param_min_insn_to_prefetch_ratio) Init(9) Param Optimization 683Min. ratio of insns to prefetches to enable prefetching for a loop with an unknown trip count. 684 685-param=min-loop-cond-split-prob= 686Common Joined UInteger Var(param_min_loop_cond_split_prob) Init(30) IntegerRange(0, 100) Param Optimization 687The minimum threshold for probability of semi-invariant condition statement to trigger loop split. 688 689-param=min-nondebug-insn-uid= 690Common Joined UInteger Var(param_min_nondebug_insn_uid) Param 691The minimum UID to be used for a nondebug insn. 692 693-param=min-size-for-stack-sharing= 694Common Joined UInteger Var(param_min_size_for_stack_sharing) Init(32) Param Optimization 695The minimum size of variables taking part in stack slot sharing when not optimizing. 696 697-param=min-spec-prob= 698Common Joined UInteger Var(param_min_spec_prob) Init(40) Param Optimization 699The minimum probability of reaching a source block for interblock speculative scheduling. 700 701-param=min-vect-loop-bound= 702Common Joined UInteger Var(param_min_vect_loop_bound) Param Optimization 703If -ftree-vectorize is used, the minimal loop bound of a loop to be considered for vectorization. 704 705-param=parloops-chunk-size= 706Common Joined UInteger Var(param_parloops_chunk_size) Param Optimization 707Chunk size of omp schedule for loops parallelized by parloops. 708 709-param=parloops-min-per-thread= 710Common Joined UInteger Var(param_parloops_min_per_thread) Init(100) IntegerRange(2, 65536) Param Optimization 711Minimum number of iterations per thread of an innermost parallelized loop. 712 713-param=parloops-schedule= 714Common Joined Var(param_parloops_schedule) Enum(parloops_schedule_type) Param Optimization 715--param=parloops-schedule=[static|dynamic|guided|auto|runtime] Schedule type of omp schedule for loops parallelized by parloops. 716 717Enum 718Name(parloops_schedule_type) Type(int) 719 720EnumValue 721Enum(parloops_schedule_type) String(static) Value(PARLOOPS_SCHEDULE_STATIC) 722 723EnumValue 724Enum(parloops_schedule_type) String(dynamic) Value(PARLOOPS_SCHEDULE_DYNAMIC) 725 726EnumValue 727Enum(parloops_schedule_type) String(guided) Value(PARLOOPS_SCHEDULE_GUIDED) 728 729EnumValue 730Enum(parloops_schedule_type) String(auto) Value(PARLOOPS_SCHEDULE_AUTO) 731 732EnumValue 733Enum(parloops_schedule_type) String(runtime) Value(PARLOOPS_SCHEDULE_RUNTIME) 734 735-param=partial-inlining-entry-probability= 736Common Joined UInteger Var(param_partial_inlining_entry_probability) Init(70) Optimization IntegerRange(0, 100) Param 737Maximum probability of the entry BB of split region (in percent relative to entry BB of the function) to make partial inlining happen. 738 739-param=predictable-branch-outcome= 740Common Joined UInteger Var(param_predictable_branch_outcome) Init(2) IntegerRange(0, 50) Param Optimization 741Maximal estimated outcome of branch considered predictable. 742 743-param=prefetch-dynamic-strides= 744Common Joined UInteger Var(param_prefetch_dynamic_strides) Init(1) IntegerRange(0, 1) Param Optimization 745Whether software prefetch hints should be issued for non-constant strides. 746 747-param=prefetch-latency= 748Common Joined UInteger Var(param_prefetch_latency) Init(200) Param Optimization 749The number of insns executed before prefetch is completed. 750 751-param=prefetch-min-insn-to-mem-ratio= 752Common Joined UInteger Var(param_prefetch_min_insn_to_mem_ratio) Init(3) Param Optimization 753Min. ratio of insns to mem ops to enable prefetching in a loop. 754 755-param=prefetch-minimum-stride= 756Common Joined UInteger Var(param_prefetch_minimum_stride) Init(-1) Param Optimization 757The minimum constant stride beyond which we should use prefetch hints for. 758 759-param=profile-func-internal-id= 760Common Joined UInteger Var(param_profile_func_internal_id) IntegerRange(0, 1) Param 761Use internal function id in profile lookup. 762 763-param=rpo-vn-max-loop-depth= 764Common Joined UInteger Var(param_rpo_vn_max_loop_depth) Init(7) IntegerRange(2, 65536) Param Optimization 765Maximum depth of a loop nest to fully value-number optimistically. 766 767-param=sccvn-max-alias-queries-per-access= 768Common Joined UInteger Var(param_sccvn_max_alias_queries_per_access) Init(1000) Param Optimization 769Maximum number of disambiguations to perform per memory access. 770 771-param=scev-max-expr-complexity= 772Common Joined UInteger Var(param_scev_max_expr_complexity) Init(10) Param Optimization 773Bound on the complexity of the expressions in the scalar evolutions analyzer. 774 775-param=scev-max-expr-size= 776Common Joined UInteger Var(param_scev_max_expr_size) Init(100) Param Optimization 777Bound on size of expressions used in the scalar evolutions analyzer. 778 779-param=sched-autopref-queue-depth= 780Common Joined UInteger Var(param_sched_autopref_queue_depth) Init(-1) Param Optimization 781Hardware autoprefetcher scheduler model control flag. Number of lookahead cycles the model looks into, at '0' only enable instruction sorting heuristic. Disabled by default. 782 783-param=sched-mem-true-dep-cost= 784Common Joined UInteger Var(param_sched_mem_true_dep_cost) Init(1) Param Optimization 785Minimal distance between possibly conflicting store and load. 786 787-param=sched-pressure-algorithm= 788Common Joined UInteger Var(param_sched_pressure_algorithm) Init(1) IntegerRange(1, 2) Param Optimization 789Which -fsched-pressure algorithm to apply. 790 791-param=sched-spec-prob-cutoff= 792Common Joined UInteger Var(param_sched_spec_prob_cutoff) Init(40) IntegerRange(0, 100) Param Optimization 793The minimal probability of speculation success (in percents), so that speculative insn will be scheduled. 794 795-param=sched-state-edge-prob-cutoff= 796Common Joined UInteger Var(param_sched_state_edge_prob_cutoff) Init(10) IntegerRange(0, 100) Param Optimization 797The minimum probability an edge must have for the scheduler to save its state across it. 798 799-param=selsched-insns-to-rename= 800Common Joined UInteger Var(param_selsched_insns_to_rename) Init(2) Param Optimization 801Maximum number of instructions in the ready list that are considered eligible for renaming. 802 803-param=selsched-max-lookahead= 804Common Joined UInteger Var(param_selsched_max_lookahead) Init(50) Param Optimization 805The maximum size of the lookahead window of selective scheduling. 806 807-param=selsched-max-sched-times= 808Common Joined UInteger Var(param_selsched_max_sched_times) Init(2) IntegerRange(1, 65536) Param Optimization 809Maximum number of times that an insn could be scheduled. 810 811-param=simultaneous-prefetches= 812Common Joined UInteger Var(param_simultaneous_prefetches) Init(3) Param Optimization 813The number of prefetches that can run at the same time. 814 815-param=sink-frequency-threshold= 816Common Joined UInteger Var(param_sink_frequency_threshold) Init(75) IntegerRange(0, 100) Param Optimization 817Target block's relative execution frequency (as a percentage) required to sink a statement. 818 819-param=slp-max-insns-in-bb= 820Common Joined UInteger Var(param_slp_max_insns_in_bb) Init(1000) Param Optimization 821Maximum number of instructions in basic block to be considered for SLP vectorization. 822 823-param=sms-dfa-history= 824Common Joined UInteger Var(param_sms_dfa_history) IntegerRange(0, 16) Param Optimization 825The number of cycles the swing modulo scheduler considers when checking conflicts using DFA. 826 827-param=sms-loop-average-count-threshold= 828Common Joined UInteger Var(param_sms_loop_average_count_threshold) Param Optimization 829A threshold on the average loop count considered by the swing modulo scheduler. 830 831-param=sms-max-ii-factor= 832Common Joined UInteger Var(param_sms_max_ii_factor) Init(2) IntegerRange(1, 16) Param Optimization 833A factor for tuning the upper bound that swing modulo scheduler uses for scheduling a loop. 834 835-param=sms-min-sc= 836Common Joined UInteger Var(param_sms_min_sc) Init(2) IntegerRange(1, 2) Param Optimization 837The minimum value of stage count that swing modulo scheduler will generate. 838 839-param=sra-max-scalarization-size-Osize= 840Common Joined UInteger Var(param_sra_max_scalarization_size_size) Param Optimization 841Maximum size, in storage units, of an aggregate which should be considered for scalarization when compiling for size. 842 843-param=sra-max-scalarization-size-Ospeed= 844Common Joined UInteger Var(param_sra_max_scalarization_size_speed) Param Optimization 845Maximum size, in storage units, of an aggregate which should be considered for scalarization when compiling for speed. 846 847-param=sra-max-propagations= 848Common Joined UInteger Var(param_sra_max_propagations) Param Optimization Init(32) 849Maximum number of artificial accesses to enable forward propagation that Scalar Replacement of Aggregates will keep for one local variable. 850 851-param=ssa-name-def-chain-limit= 852Common Joined UInteger Var(param_ssa_name_def_chain_limit) Init(512) Param Optimization 853The maximum number of SSA_NAME assignments to follow in determining a value. 854 855-param=ssp-buffer-size= 856Common Joined UInteger Var(param_ssp_buffer_size) Init(8) IntegerRange(1, 65536) Param Optimization 857The lower bound for a buffer to be considered for stack smashing protection. 858 859-param=stack-clash-protection-guard-size= 860Common Joined UInteger Var(param_stack_clash_protection_guard_size) Init(12) IntegerRange(12, 30) Param Optimization 861Size of the stack guard expressed as a power of two in bytes. 862 863-param=stack-clash-protection-probe-interval= 864Common Joined UInteger Var(param_stack_clash_protection_probe_interval) Init(12) IntegerRange(10, 16) Param Optimization 865Interval in which to probe the stack expressed as a power of two in bytes. 866 867-param=store-merging-allow-unaligned= 868Common Joined UInteger Var(param_store_merging_allow_unaligned) Init(1) IntegerRange(0, 1) Param Optimization 869Allow the store merging pass to introduce unaligned stores if it is legal to do so. 870 871-param=store-merging-max-size= 872Common Joined UInteger Var(param_store_merging_max_size) Init(65536) IntegerRange(1, 65536) Param Optimization 873Maximum size of a single store merging region in bytes. 874 875-param=switch-conversion-max-branch-ratio= 876Common Joined UInteger Var(param_switch_conversion_branch_ratio) Init(8) IntegerRange(1, 65536) Param Optimization 877The maximum ratio between array size and switch branches for a switch conversion to take place. 878 879-param=tm-max-aggregate-size= 880Common Joined UInteger Var(param_tm_max_aggregate_size) Init(9) Param Optimization 881Size in bytes after which thread-local aggregates should be instrumented with the logging functions instead of save/restore pairs. 882 883-param=tracer-dynamic-coverage= 884Common Joined UInteger Var(param_tracer_dynamic_coverage) Init(75) IntegerRange(0, 100) Param Optimization 885The percentage of function, weighted by execution frequency, that must be covered by trace formation. Used when profile feedback is not available. 886 887-param=tracer-dynamic-coverage-feedback= 888Common Joined UInteger Var(param_tracer_dynamic_coverage_feedback) Init(95) IntegerRange(0, 100) Param Optimization 889The percentage of function, weighted by execution frequency, that must be covered by trace formation. Used when profile feedback is available. 890 891-param=tracer-max-code-growth= 892Common Joined UInteger Var(param_tracer_max_code_growth) Init(100) Param Optimization 893Maximal code growth caused by tail duplication (in percent). 894 895-param=tracer-min-branch-probability= 896Common Joined UInteger Var(param_tracer_min_branch_probability) Init(50) IntegerRange(0, 100) Param Optimization 897Stop forward growth if the probability of best edge is less than this threshold (in percent). Used when profile feedback is not available. 898 899-param=tracer-min-branch-probability-feedback= 900Common Joined UInteger Var(param_tracer_min_branch_probability_feedback) Init(80) IntegerRange(0, 100) Param Optimization 901Stop forward growth if the probability of best edge is less than this threshold (in percent). Used when profile feedback is available. 902 903-param=tracer-min-branch-ratio= 904Common Joined UInteger Var(param_tracer_min_branch_ratio) Init(10) IntegerRange(0, 100) Param Optimization 905Stop reverse growth if the reverse probability of best edge is less than this threshold (in percent). 906 907-param=tree-reassoc-width= 908Common Joined UInteger Var(param_tree_reassoc_width) Param Optimization 909Set the maximum number of instructions executed in parallel in reassociated tree. If 0, use the target dependent heuristic. 910 911-param=uninit-control-dep-attempts= 912Common Joined UInteger Var(param_uninit_control_dep_attempts) Init(1000) IntegerRange(1, 65536) Param Optimization 913Maximum number of nested calls to search for control dependencies during uninitialized variable analysis. 914 915-param=uninlined-function-insns= 916Common Joined UInteger Var(param_uninlined_function_insns) Init(2) Optimization IntegerRange(0, 1000000) Param 917Instruction accounted for function prologue, epilogue and other overhead. 918 919-param=uninlined-function-time= 920Common Joined UInteger Var(param_uninlined_function_time) Optimization IntegerRange(0, 1000000) Param 921Time accounted for function prologue, epilogue and other overhead. 922 923-param=uninlined-thunk-insns= 924Common Joined UInteger Var(param_uninlined_function_thunk_insns) Optimization Init(2) IntegerRange(0, 1000000) Param 925Instruction accounted for function thunk overhead. 926 927-param=uninlined-thunk-time= 928Common Joined UInteger Var(param_uninlined_function_thunk_time) Optimization Init(2) IntegerRange(0, 1000000) Param 929Time accounted for function thunk overhead. 930 931-param=unlikely-bb-count-fraction= 932Common Joined UInteger Var(param_unlikely_bb_count_fraction) Init(20) Param Optimization 933The denominator n of fraction 1/n of the number of profiled runs of the entire program below which the execution count of a basic block must be in order for the basic block to be considered unlikely. 934 935-param=unroll-jam-max-unroll= 936Common Joined UInteger Var(param_unroll_jam_max_unroll) Init(4) Param Optimization 937Maximum unroll factor for the unroll-and-jam transformation. 938 939-param=unroll-jam-min-percent= 940Common Joined UInteger Var(param_unroll_jam_min_percent) Init(1) IntegerRange(0, 100) Param Optimization 941Minimum percentage of memrefs that must go away for unroll-and-jam to be considered profitable. 942 943-param=use-after-scope-direct-emission-threshold= 944Common Joined UInteger Var(param_use_after_scope_direct_emission_threshold) Init(256) Param Optimization 945Use direct poisoning/unpoisoning instructions for variables smaller or equal to this number. 946 947-param=use-canonical-types= 948Common Joined UInteger Var(param_use_canonical_types) Init(1) IntegerRange(0, 1) Param 949Whether to use canonical types. 950 951-param=vect-epilogues-nomask= 952Common Joined UInteger Var(param_vect_epilogues_nomask) Init(1) IntegerRange(0, 1) Param Optimization 953Enable loop epilogue vectorization using smaller vector size. 954 955-param=vect-max-peeling-for-alignment= 956Common Joined UInteger Var(param_vect_max_peeling_for_alignment) Init(-1) IntegerRange(-1, 64) Param Optimization 957Maximum number of loop peels to enhance alignment of data references in a loop. 958 959-param=vect-max-version-for-alias-checks= 960Common Joined UInteger Var(param_vect_max_version_for_alias_checks) Init(10) Param Optimization 961Bound on number of runtime checks inserted by the vectorizer's loop versioning for alias check. 962 963-param=vect-max-version-for-alignment-checks= 964Common Joined UInteger Var(param_vect_max_version_for_alignment_checks) Init(6) Param Optimization 965Bound on number of runtime checks inserted by the vectorizer's loop versioning for alignment check. 966 967; This comment is to ensure we retain the blank line above. 968