ia64.opt revision 1.8
1; Copyright (C) 2005-2017 Free Software Foundation, Inc. 2; 3; This file is part of GCC. 4; 5; GCC is free software; you can redistribute it and/or modify it under 6; the terms of the GNU General Public License as published by the Free 7; Software Foundation; either version 3, or (at your option) any later 8; version. 9; 10; GCC is distributed in the hope that it will be useful, but WITHOUT ANY 11; WARRANTY; without even the implied warranty of MERCHANTABILITY or 12; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13; for more details. 14; 15; You should have received a copy of the GNU General Public License 16; along with GCC; see the file COPYING3. If not see 17; <http://www.gnu.org/licenses/>. 18 19HeaderInclude 20config/ia64/ia64-opts.h 21 22; Which cpu are we scheduling for. 23Variable 24enum processor_type ia64_tune = PROCESSOR_ITANIUM2 25 26mbig-endian 27Target Report RejectNegative Mask(BIG_ENDIAN) 28Generate big endian code. 29 30mlittle-endian 31Target Report RejectNegative InverseMask(BIG_ENDIAN) 32Generate little endian code. 33 34mgnu-as 35Target Report Mask(GNU_AS) 36Generate code for GNU as. 37 38mgnu-ld 39Target Report Mask(GNU_LD) 40Generate code for GNU ld. 41 42mvolatile-asm-stop 43Target Report Mask(VOL_ASM_STOP) 44Emit stop bits before and after volatile extended asms. 45 46mregister-names 47Target Mask(REG_NAMES) 48Use in/loc/out register names. 49 50mno-sdata 51Target Report RejectNegative Mask(NO_SDATA) 52 53msdata 54Target Report RejectNegative InverseMask(NO_SDATA) 55Enable use of sdata/scommon/sbss. 56 57mno-pic 58Target Report RejectNegative Mask(NO_PIC) 59Generate code without GP reg. 60 61mconstant-gp 62Target Report RejectNegative Mask(CONST_GP) 63gp is constant (but save/restore gp on indirect calls). 64 65mauto-pic 66Target Report RejectNegative Mask(AUTO_PIC) 67Generate self-relocatable code. 68 69minline-float-divide-min-latency 70Target Report RejectNegative Var(TARGET_INLINE_FLOAT_DIV, 1) 71Generate inline floating point division, optimize for latency. 72 73minline-float-divide-max-throughput 74Target Report RejectNegative Var(TARGET_INLINE_FLOAT_DIV, 2) Init(2) 75Generate inline floating point division, optimize for throughput. 76 77mno-inline-float-divide 78Target Report RejectNegative Var(TARGET_INLINE_FLOAT_DIV, 0) 79 80minline-int-divide-min-latency 81Target Report RejectNegative Var(TARGET_INLINE_INT_DIV, 1) 82Generate inline integer division, optimize for latency. 83 84minline-int-divide-max-throughput 85Target Report RejectNegative Var(TARGET_INLINE_INT_DIV, 2) 86Generate inline integer division, optimize for throughput. 87 88mno-inline-int-divide 89Target Report RejectNegative Var(TARGET_INLINE_INT_DIV, 0) 90Do not inline integer division. 91 92minline-sqrt-min-latency 93Target Report RejectNegative Var(TARGET_INLINE_SQRT, 1) 94Generate inline square root, optimize for latency. 95 96minline-sqrt-max-throughput 97Target Report RejectNegative Var(TARGET_INLINE_SQRT, 2) 98Generate inline square root, optimize for throughput. 99 100mno-inline-sqrt 101Target Report RejectNegative Var(TARGET_INLINE_SQRT, 0) 102Do not inline square root. 103 104mdwarf2-asm 105Target Report Mask(DWARF2_ASM) 106Enable DWARF line debug info via GNU as. 107 108mearly-stop-bits 109Target Report Mask(EARLY_STOP_BITS) 110Enable earlier placing stop bits for better scheduling. 111 112mfixed-range= 113Target RejectNegative Joined Var(ia64_deferred_options) Defer 114Specify range of registers to make fixed. 115 116mtls-size= 117Target RejectNegative Joined UInteger Var(ia64_tls_size) Init(22) 118Specify bit size of immediate TLS offsets. 119 120mtune= 121Target RejectNegative Joined Enum(ia64_tune) Var(ia64_tune) 122Schedule code for given CPU. 123 124Enum 125Name(ia64_tune) Type(enum processor_type) 126Known Itanium CPUs (for use with the -mtune= option): 127 128EnumValue 129Enum(ia64_tune) String(itanium2) Value(PROCESSOR_ITANIUM2) 130 131EnumValue 132Enum(ia64_tune) String(mckinley) Value(PROCESSOR_ITANIUM2) 133 134msched-br-data-spec 135Target Report Var(mflag_sched_br_data_spec) Init(0) 136Use data speculation before reload. 137 138msched-ar-data-spec 139Target Report Var(mflag_sched_ar_data_spec) Init(1) 140Use data speculation after reload. 141 142msched-control-spec 143Target Report Var(mflag_sched_control_spec) Init(2) 144Use control speculation. 145 146msched-br-in-data-spec 147Target Report Var(mflag_sched_br_in_data_spec) Init(1) 148Use in block data speculation before reload. 149 150msched-ar-in-data-spec 151Target Report Var(mflag_sched_ar_in_data_spec) Init(1) 152Use in block data speculation after reload. 153 154msched-in-control-spec 155Target Report Var(mflag_sched_in_control_spec) Init(1) 156Use in block control speculation. 157 158msched-spec-ldc 159Target Report Var(mflag_sched_spec_ldc) Init(1) 160Use simple data speculation check. 161 162msched-spec-control-ldc 163Target Report Var(mflag_sched_spec_control_ldc) Init(0) 164Use simple data speculation check for control speculation. 165 166msched-prefer-non-data-spec-insns 167Target Ignore Warn(switch %qs is no longer supported) 168 169msched-prefer-non-control-spec-insns 170Target Ignore Warn(switch %qs is no longer supported) 171 172msched-count-spec-in-critical-path 173Target Report Var(mflag_sched_count_spec_in_critical_path) Init(0) 174Count speculative dependencies while calculating priority of instructions. 175 176msched-stop-bits-after-every-cycle 177Target Report Var(mflag_sched_stop_bits_after_every_cycle) Init(1) 178Place a stop bit after every cycle when scheduling. 179 180msched-fp-mem-deps-zero-cost 181Target Report Var(mflag_sched_fp_mem_deps_zero_cost) Init(0) 182Assume that floating-point stores and loads are not likely to cause conflict when placed into one instruction group. 183 184msched-max-memory-insns= 185Target RejectNegative Joined UInteger Var(ia64_max_memory_insns) Init(1) 186Soft limit on number of memory insns per instruction group, giving lower priority to subsequent memory insns attempting to schedule in the same insn group. Frequently useful to prevent cache bank conflicts. Default value is 1. 187 188msched-max-memory-insns-hard-limit 189Target Report Var(mflag_sched_mem_insns_hard_limit) Init(0) 190Disallow more than 'msched-max-memory-insns' in instruction group. Otherwise, limit is 'soft' (prefer non-memory operations when limit is reached). 191 192msel-sched-dont-check-control-spec 193Target Report Var(mflag_sel_sched_dont_check_control_spec) Init(0) 194Don't generate checks for control speculation in selective scheduling. 195 196; This comment is to ensure we retain the blank line above. 197