{
  "all_compiler_flags_desc": {
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      "choice": [
        "-O3", 
        "-O0", 
        "-O1", 
        "-O2", 
        "-Os"
      ], 
      "default": "", 
      "desc": "base compiler flag", 
      "sort": 10000, 
      "tags": [
        "base", 
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##falign_functions": {
      "can_omit": "yes", 
      "default": "", 
      "desc": "compiler flag: -falign-functions=", 
      "explore_prefix": "-falign-functions=", 
      "explore_start": 1, 
      "explore_step": 1, 
      "explore_stop": 64, 
      "sort": 10400, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "integer"
    }, 
    "##falign_jumps": {
      "can_omit": "yes", 
      "default": "", 
      "desc": "compiler flag: -falign-jumps=", 
      "explore_prefix": "-falign-jumps=", 
      "explore_start": 1, 
      "explore_step": 1, 
      "explore_stop": 64, 
      "sort": 10500, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "integer"
    }, 
    "##falign_labels": {
      "can_omit": "yes", 
      "default": "", 
      "desc": "compiler flag: -falign-labels=", 
      "explore_prefix": "-falign-labels=", 
      "explore_start": 1, 
      "explore_step": 1, 
      "explore_stop": 64, 
      "sort": 10600, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "integer"
    }, 
    "##falign_loops": {
      "can_omit": "yes", 
      "default": "", 
      "desc": "compiler flag: -falign-loops=", 
      "explore_prefix": "-falign-loops=", 
      "explore_start": 1, 
      "explore_step": 1, 
      "explore_stop": 64, 
      "sort": 10700, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "integer"
    }, 
    "##fbranch_count_reg": {
      "can_omit": "yes", 
      "choice": [
        "-fbranch-count-reg", 
        "-fno-branch-count-reg"
      ], 
      "default": "", 
      "desc": "compiler flag: -fbranch-count-reg", 
      "sort": 11700, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fbranch_target_load_optimize": {
      "can_omit": "yes", 
      "choice": [
        "-fbranch-target-load-optimize", 
        "-fno-branch-target-load-optimize"
      ], 
      "default": "", 
      "desc": "compiler flag: -fbranch-target-load-optimize", 
      "sort": 11800, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fbtr_bb_exclusive": {
      "can_omit": "yes", 
      "choice": [
        "-fbtr-bb-exclusive", 
        "-fno-btr-bb-exclusive"
      ], 
      "default": "", 
      "desc": "compiler flag: -fbtr-bb-exclusive", 
      "sort": 11900, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fcaller_saves": {
      "can_omit": "yes", 
      "choice": [
        "-fcaller-saves", 
        "-fno-caller-saves"
      ], 
      "default": "", 
      "desc": "compiler flag: -fcaller-saves", 
      "sort": 12000, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fcprop_registers": {
      "can_omit": "yes", 
      "choice": [
        "-fcprop-registers", 
        "-fno-cprop-registers"
      ], 
      "default": "", 
      "desc": "compiler flag: -fcprop-registers", 
      "sort": 12100, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fcrossjumping": {
      "can_omit": "yes", 
      "choice": [
        "-fcrossjumping", 
        "-fno-crossjumping"
      ], 
      "default": "", 
      "desc": "compiler flag: -fcrossjumping", 
      "sort": 12200, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fcse_follow_jumps": {
      "can_omit": "yes", 
      "choice": [
        "-fcse-follow-jumps", 
        "-fno-cse-follow-jumps"
      ], 
      "default": "", 
      "desc": "compiler flag: -fcse-follow-jumps", 
      "sort": 12300, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fcse_skip_blocks": {
      "can_omit": "yes", 
      "choice": [
        "-fcse-skip-blocks", 
        "-fno-cse-skip-blocks"
      ], 
      "default": "", 
      "desc": "compiler flag: -fcse-skip-blocks", 
      "sort": 12400, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fcx_limited_range": {
      "can_omit": "yes", 
      "choice": [
        "-fcx-limited-range", 
        "-fno-cx-limited-range"
      ], 
      "default": "", 
      "desc": "compiler flag: -fcx-limited-range", 
      "sort": 12500, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fdefer_pop": {
      "can_omit": "yes", 
      "choice": [
        "-fdefer-pop", 
        "-fno-defer-pop"
      ], 
      "default": "", 
      "desc": "compiler flag: -fdefer-pop", 
      "sort": 12600, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fdelete_null_pointer_checks": {
      "can_omit": "yes", 
      "choice": [
        "-fdelete-null-pointer-checks", 
        "-fno-delete-null-pointer-checks"
      ], 
      "default": "", 
      "desc": "compiler flag: -fdelete-null-pointer-checks", 
      "sort": 12700, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fearly_inlining": {
      "can_omit": "yes", 
      "choice": [
        "-fearly-inlining", 
        "-fno-early-inlining"
      ], 
      "default": "", 
      "desc": "compiler flag: -fearly-inlining", 
      "sort": 12800, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fexpensive_optimizations": {
      "can_omit": "yes", 
      "choice": [
        "-fexpensive-optimizations", 
        "-fno-expensive-optimizations"
      ], 
      "default": "", 
      "desc": "compiler flag: -fexpensive-optimizations", 
      "sort": 12900, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##ffunction_cse": {
      "can_omit": "yes", 
      "choice": [
        "-ffunction-cse", 
        "-fno-function-cse"
      ], 
      "default": "", 
      "desc": "compiler flag: -ffunction-cse", 
      "sort": 13000, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fgcse": {
      "can_omit": "yes", 
      "choice": [
        "-fgcse", 
        "-fno-gcse"
      ], 
      "default": "", 
      "desc": "compiler flag: -fgcse", 
      "sort": 13500, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fgcse_after_reload": {
      "can_omit": "yes", 
      "choice": [
        "-fgcse-after-reload", 
        "-fno-gcse-after-reload"
      ], 
      "default": "", 
      "desc": "compiler flag: -fgcse-after-reload", 
      "sort": 13100, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fgcse_las": {
      "can_omit": "yes", 
      "choice": [
        "-fgcse-las", 
        "-fno-gcse-las"
      ], 
      "default": "", 
      "desc": "compiler flag: -fgcse-las", 
      "sort": 13200, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fgcse_lm": {
      "can_omit": "yes", 
      "choice": [
        "-fgcse-lm", 
        "-fno-gcse-lm"
      ], 
      "default": "", 
      "desc": "compiler flag: -fgcse-lm", 
      "sort": 13300, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fgcse_sm": {
      "can_omit": "yes", 
      "choice": [
        "-fgcse-sm", 
        "-fno-gcse-sm"
      ], 
      "default": "", 
      "desc": "compiler flag: -fgcse-sm", 
      "sort": 13400, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fguess_branch_probability": {
      "can_omit": "yes", 
      "choice": [
        "-fguess-branch-probability", 
        "-fno-guess-branch-probability"
      ], 
      "default": "", 
      "desc": "compiler flag: -fguess-branch-probability", 
      "sort": 13600, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fif_conversion": {
      "can_omit": "yes", 
      "choice": [
        "-fif-conversion", 
        "-fno-if-conversion"
      ], 
      "default": "", 
      "desc": "compiler flag: -fif-conversion", 
      "sort": 13700, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fif_conversion2": {
      "can_omit": "yes", 
      "choice": [
        "-fif-conversion2", 
        "-fno-if-conversion2"
      ], 
      "default": "", 
      "desc": "compiler flag: -fif-conversion2", 
      "sort": 13800, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##finline_functions": {
      "can_omit": "yes", 
      "choice": [
        "-finline-functions", 
        "-fno-inline-functions"
      ], 
      "default": "", 
      "desc": "compiler flag: -finline-functions", 
      "sort": 13900, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##finline_limit": {
      "can_omit": "yes", 
      "default": "", 
      "desc": "compiler flag: -finline-limit=", 
      "explore_prefix": "-finline-limit=", 
      "explore_start": 64, 
      "explore_step": 1, 
      "explore_stop": 2048, 
      "sort": 10300, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "integer"
    }, 
    "##fivopts": {
      "can_omit": "yes", 
      "choice": [
        "-fivopts", 
        "-fno-ivopts"
      ], 
      "default": "", 
      "desc": "compiler flag: -fivopts", 
      "sort": 14000, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##floop_optimize": {
      "can_omit": "yes", 
      "choice": [
        "-floop-optimize", 
        "-fno-loop-optimize"
      ], 
      "default": "", 
      "desc": "compiler flag: -floop-optimize", 
      "sort": 14100, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fmath_errno": {
      "can_omit": "yes", 
      "choice": [
        "-fmath-errno", 
        "-fno-math-errno"
      ], 
      "default": "", 
      "desc": "compiler flag: -fmath-errno", 
      "sort": 14200, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fmerge_constants": {
      "can_omit": "yes", 
      "choice": [
        "-fmerge-constants", 
        "-fno-merge-constants"
      ], 
      "default": "", 
      "desc": "compiler flag: -fmerge-constants", 
      "sort": 14300, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fmodulo_sched": {
      "can_omit": "yes", 
      "choice": [
        "-fmodulo-sched", 
        "-fno-modulo-sched"
      ], 
      "default": "", 
      "desc": "compiler flag: -fmodulo-sched", 
      "sort": 14400, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fmove_loop_invariants": {
      "can_omit": "yes", 
      "choice": [
        "-fmove-loop-invariants", 
        "-fno-move-loop-invariants"
      ], 
      "default": "", 
      "desc": "compiler flag: -fmove-loop-invariants", 
      "sort": 14500, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fomit_frame_pointer": {
      "can_omit": "yes", 
      "choice": [
        "-fomit-frame-pointer", 
        "-fno-omit-frame-pointer"
      ], 
      "default": "", 
      "desc": "compiler flag: -fomit-frame-pointer", 
      "sort": 14600, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##foptimize_register_move": {
      "can_omit": "yes", 
      "choice": [
        "-foptimize-register-move", 
        "-fno-optimize-register-move"
      ], 
      "default": "", 
      "desc": "compiler flag: -foptimize-register-move", 
      "sort": 14700, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##foptimize_sibling_calls": {
      "can_omit": "yes", 
      "choice": [
        "-foptimize-sibling-calls", 
        "-fno-optimize-sibling-calls"
      ], 
      "default": "", 
      "desc": "compiler flag: -foptimize-sibling-calls", 
      "sort": 14800, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fpeel_loops": {
      "can_omit": "yes", 
      "choice": [
        "-fpeel-loops", 
        "-fno-peel-loops"
      ], 
      "default": "", 
      "desc": "compiler flag: -fpeel-loops", 
      "sort": 14900, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fpeephole": {
      "can_omit": "yes", 
      "choice": [
        "-fpeephole", 
        "-fno-peephole"
      ], 
      "default": "", 
      "desc": "compiler flag: -fpeephole", 
      "sort": 15000, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fpeephole2": {
      "can_omit": "yes", 
      "choice": [
        "-fpeephole2", 
        "-fno-peephole2"
      ], 
      "default": "", 
      "desc": "compiler flag: -fpeephole2", 
      "sort": 15100, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fprefetch_loop_arrays": {
      "can_omit": "yes", 
      "choice": [
        "-fprefetch-loop-arrays", 
        "-fno-prefetch-loop-arrays"
      ], 
      "default": "", 
      "desc": "compiler flag: -fprefetch-loop-arrays", 
      "sort": 15200, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fregmove": {
      "can_omit": "yes", 
      "choice": [
        "-fregmove", 
        "-fno-regmove"
      ], 
      "default": "", 
      "desc": "compiler flag: -fregmove", 
      "sort": 15300, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##frename_registers": {
      "can_omit": "yes", 
      "choice": [
        "-frename-registers", 
        "-fno-rename-registers"
      ], 
      "default": "", 
      "desc": "compiler flag: -frename-registers", 
      "sort": 15400, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##freorder_blocks": {
      "can_omit": "yes", 
      "choice": [
        "-freorder-blocks", 
        "-fno-reorder-blocks"
      ], 
      "default": "", 
      "desc": "compiler flag: -freorder-blocks", 
      "sort": 15500, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##freorder_functions": {
      "can_omit": "yes", 
      "choice": [
        "-freorder-functions", 
        "-fno-reorder-functions"
      ], 
      "default": "", 
      "desc": "compiler flag: -freorder-functions", 
      "sort": 15600, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##frerun_cse_after_loop": {
      "can_omit": "yes", 
      "choice": [
        "-frerun-cse-after-loop", 
        "-fno-rerun-cse-after-loop"
      ], 
      "default": "", 
      "desc": "compiler flag: -frerun-cse-after-loop", 
      "sort": 15700, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##frerun_loop_opt": {
      "can_omit": "yes", 
      "choice": [
        "-frerun-loop-opt", 
        "-fno-rerun-loop-opt"
      ], 
      "default": "", 
      "desc": "compiler flag: -frerun-loop-opt", 
      "sort": 15800, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##freschedule_modulo_scheduled_loops": {
      "can_omit": "yes", 
      "choice": [
        "-freschedule-modulo-scheduled-loops", 
        "-fno-reschedule-modulo-scheduled-loops"
      ], 
      "default": "", 
      "desc": "compiler flag: -freschedule-modulo-scheduled-loops", 
      "sort": 15900, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fsched2_use_superblocks": {
      "can_omit": "yes", 
      "choice": [
        "-fsched2-use-superblocks", 
        "-fno-sched2-use-superblocks"
      ], 
      "default": "", 
      "desc": "compiler flag: -fsched2-use-superblocks", 
      "sort": 16400, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fsched_interblock": {
      "can_omit": "yes", 
      "choice": [
        "-fsched-interblock", 
        "-fno-sched-interblock"
      ], 
      "default": "", 
      "desc": "compiler flag: -fsched-interblock", 
      "sort": 16000, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fsched_spec": {
      "can_omit": "yes", 
      "choice": [
        "-fsched-spec", 
        "-fno-sched-spec"
      ], 
      "default": "", 
      "desc": "compiler flag: -fsched-spec", 
      "sort": 16300, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fsched_spec_load": {
      "can_omit": "yes", 
      "choice": [
        "-fsched-spec-load", 
        "-fno-sched-spec-load"
      ], 
      "default": "", 
      "desc": "compiler flag: -fsched-spec-load", 
      "sort": 16200, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fsched_spec_load_dangerous": {
      "can_omit": "yes", 
      "choice": [
        "-fsched-spec-load-dangerous", 
        "-fno-sched-spec-load-dangerous"
      ], 
      "default": "", 
      "desc": "compiler flag: -fsched-spec-load-dangerous", 
      "sort": 16100, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fsched_stalled_insns": {
      "can_omit": "yes", 
      "default": "", 
      "desc": "compiler flag: -fsched-stalled-insns=", 
      "explore_prefix": "-fsched-stalled-insns=", 
      "explore_start": 1, 
      "explore_step": 1, 
      "explore_stop": 64, 
      "sort": 10200, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "integer"
    }, 
    "##fsched_stalled_insns_dep": {
      "can_omit": "yes", 
      "default": "", 
      "desc": "compiler flag: -fsched-stalled-insns-dep=", 
      "explore_prefix": "-fsched-stalled-insns-dep=", 
      "explore_start": 1, 
      "explore_step": 1, 
      "explore_stop": 64, 
      "sort": 10100, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "integer"
    }, 
    "##fschedule_insns": {
      "can_omit": "yes", 
      "choice": [
        "-fschedule-insns", 
        "-fno-schedule-insns"
      ], 
      "default": "", 
      "desc": "compiler flag: -fschedule-insns", 
      "sort": 16500, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fschedule_insns2": {
      "can_omit": "yes", 
      "choice": [
        "-fschedule-insns2", 
        "-fno-schedule-insns2"
      ], 
      "default": "", 
      "desc": "compiler flag: -fschedule-insns2", 
      "sort": 16600, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fsignaling_nans": {
      "can_omit": "yes", 
      "choice": [
        "-fsignaling-nans", 
        "-fno-signaling-nans"
      ], 
      "default": "", 
      "desc": "compiler flag: -fsignaling-nans", 
      "sort": 16700, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fsingle_precision_constant": {
      "can_omit": "yes", 
      "choice": [
        "-fsingle-precision-constant", 
        "-fno-single-precision-constant"
      ], 
      "default": "", 
      "desc": "compiler flag: -fsingle-precision-constant", 
      "sort": 16800, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fsplit_ivs_in_unroller": {
      "can_omit": "yes", 
      "choice": [
        "-fsplit-ivs-in-unroller", 
        "-fno-split-ivs-in-unroller"
      ], 
      "default": "", 
      "desc": "compiler flag: -fsplit-ivs-in-unroller", 
      "sort": 16900, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fstrength_reduce": {
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      "choice": [
        "-fstrength-reduce", 
        "-fno-strength-reduce"
      ], 
      "default": "", 
      "desc": "compiler flag: -fstrength-reduce", 
      "sort": 17000, 
      "tags": [
        "basic", 
        "optimization"
      ], 
      "type": "text"
    }, 
    "##fstrict_aliasing": {
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      "choice": [
        "-fstrict-aliasing", 
        "-fno-strict-aliasing"
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      "default": "", 
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        "basic", 
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      ], 
      "type": "text"
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    "##fthread_jumps": {
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        "-fthread-jumps", 
        "-fno-thread-jumps"
      ], 
      "default": "", 
      "desc": "compiler flag: -fthread-jumps", 
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        "basic", 
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      "type": "text"
    }, 
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      "choice": [
        "-ftracer", 
        "-fno-tracer"
      ], 
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      "desc": "compiler flag: -ftracer", 
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        "basic", 
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      "type": "text"
    }, 
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      "choice": [
        "-ftree-ccp", 
        "-fno-tree-ccp"
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      "default": "", 
      "desc": "compiler flag: -ftree-ccp", 
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        "basic", 
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      "type": "text"
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      "choice": [
        "-ftree-ch", 
        "-fno-tree-ch"
      ], 
      "default": "", 
      "desc": "compiler flag: -ftree-ch", 
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        "basic", 
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      "type": "text"
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        "-ftree-copyrename", 
        "-fno-tree-copyrename"
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      "default": "", 
      "desc": "compiler flag: -ftree-copyrename", 
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        "basic", 
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      "type": "text"
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      "choice": [
        "-ftree-dce", 
        "-fno-tree-dce"
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      "default": "", 
      "desc": "compiler flag: -ftree-dce", 
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        "basic", 
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      "type": "text"
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        "-ftree-dominator-opts", 
        "-fno-tree-dominator-opts"
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      "default": "", 
      "desc": "compiler flag: -ftree-dominator-opts", 
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        "basic", 
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      "type": "text"
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        "-ftree-dse", 
        "-fno-tree-dse"
      ], 
      "default": "", 
      "desc": "compiler flag: -ftree-dse", 
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        "-ftree-fre", 
        "-fno-tree-fre"
      ], 
      "default": "", 
      "desc": "compiler flag: -ftree-fre", 
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        "-ftree-loop-im", 
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      "default": "", 
      "desc": "compiler flag: -ftree-loop-im", 
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      "choice": [
        "-ftree-loop-ivcanon", 
        "-fno-tree-loop-ivcanon"
      ], 
      "default": "", 
      "desc": "compiler flag: -ftree-loop-ivcanon", 
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      "tags": [
        "basic", 
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      "type": "text"
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        "-ftree-loop-linear", 
        "-fno-tree-loop-linear"
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      "default": "", 
      "desc": "compiler flag: -ftree-loop-linear", 
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        "basic", 
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        "-ftree-loop-optimize", 
        "-fno-tree-loop-optimize"
      ], 
      "default": "", 
      "desc": "compiler flag: -ftree-loop-optimize", 
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      "tags": [
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      "type": "text"
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      "choice": [
        "-ftree-lrs", 
        "-fno-tree-lrs"
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      "default": "", 
      "desc": "compiler flag: -ftree-lrs", 
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      "type": "text"
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      "choice": [
        "-ftree-pre", 
        "-fno-tree-pre"
      ], 
      "default": "", 
      "desc": "compiler flag: -ftree-pre", 
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        "-ftree-sra", 
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      "default": "", 
      "desc": "compiler flag: -ftree-sra", 
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      "type": "text"
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      "choice": [
        "-ftree-ter", 
        "-fno-tree-ter"
      ], 
      "default": "", 
      "desc": "compiler flag: -ftree-ter", 
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      "type": "text"
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    "##ftree_vect_loop_version": {
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      "choice": [
        "-ftree-vect-loop-version", 
        "-fno-tree-vect-loop-version"
      ], 
      "default": "", 
      "desc": "compiler flag: -ftree-vect-loop-version", 
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        "-ftree-vectorize", 
        "-fno-tree-vectorize"
      ], 
      "default": "", 
      "desc": "compiler flag: -ftree-vectorize", 
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      ], 
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        "-funroll-all-loops", 
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      ], 
      "default": "", 
      "desc": "compiler flag: -funroll-all-loops", 
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        "optimization"
      ], 
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        "-funswitch-loops", 
        "-fno-unswitch-loops"
      ], 
      "default": "", 
      "desc": "compiler flag: -funswitch-loops", 
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      "tags": [
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      ], 
      "type": "text"
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    "##fvariable_expansion_in_unroller": {
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        "-fvariable-expansion-in-unroller", 
        "-fno-variable-expansion-in-unroller"
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      "default": "", 
      "desc": "compiler flag: -fvariable-expansion-in-unroller", 
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      "type": "text"
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    "##openmp": {
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      ], 
      "default": "", 
      "desc": "compiler flag: openmp", 
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      "tags": [
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        "optimization"
      ], 
      "type": "text"
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    "##param_inline_call_cost": {
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      "desc": "compiler flag: --param inline-call-cost=", 
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      "type": "integer"
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    "##param_inline_unit_growth": {
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      "default": "", 
      "desc": "compiler flag: --param inline-unit-growth=", 
      "explore_prefix": "--param inline-unit-growth=", 
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      "tags": [
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      "type": "integer"
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    "##param_large_function_growth": {
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      "default": "", 
      "desc": "compiler flag: --param large-function-growth=", 
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      "tags": [
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      "type": "integer"
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    "##param_large_function_insns": {
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      "default": "", 
      "desc": "compiler flag: --param large-function-insns=", 
      "explore_prefix": "--param large-function-insns=", 
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      "explore_step": 1, 
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      "type": "integer"
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    "##param_large_unit_insns": {
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      "default": "", 
      "desc": "compiler flag: --param large-unit-insns=", 
      "explore_prefix": "--param large-unit-insns=", 
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      "tags": [
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      "type": "integer"
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    "##param_max_gcse_passes": {
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      "default": "", 
      "desc": "compiler flag: --param max-gcse-passes=", 
      "explore_prefix": "--param max-gcse-passes=", 
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      "type": "integer"
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    "##param_max_inline_insns_auto": {
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      "default": "", 
      "desc": "compiler flag: --param max-inline-insns-auto=", 
      "explore_prefix": "--param max-inline-insns-auto=", 
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      "type": "integer"
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    "##param_max_unroll_times": {
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      "default": "", 
      "desc": "compiler flag: --param max-unroll-times=", 
      "explore_prefix": "--param max-unroll-times=", 
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      "tags": [
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      "type": "integer"
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    "##param_max_unrolled_insns": {
      "can_omit": "yes", 
      "default": "", 
      "desc": "compiler flag: --param max-unrolled-insns=", 
      "explore_prefix": "--param max-unrolled-insns=", 
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      "explore_step": 1, 
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      "type": "integer"
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  }
}