Bug 145768 – FTL should eliminate array bounds checks in loops

• Component: JavaScriptCore
• Status: RESOLVED FIXED

[Filip Pizlo]

This will be fun.

[Filip Pizlo]

Created attachment 254531 [details]
work in progress

[Filip Pizlo]

Created attachment 254540 [details]
a bit more

[Filip Pizlo]

Created attachment 254551 [details]
it is written

[Filip Pizlo]

Created attachment 254595 [details]
starting to do things

[Filip Pizlo]

Created attachment 254596 [details]
it's removing bounds checks

Still a lot more testing to do though.

[Filip Pizlo]

Created attachment 254597 [details]
for real this time

The last upload was a stale file.

[Filip Pizlo]

Created attachment 254608 [details]
adding the != relationship

This will help with loops bounded by !=length or !=0, rather than the inequality.

[Filip Pizlo]

Created attachment 254618 [details]
looks pretty good

This now eliminates the array bounds check and the induction variable's increment/decrement overflow check in each of these loop styles:

function foo(array) {
    var result = 0;
    for (var i = 0; i < array.length; ++i)
        result += array[i];
    return result;
}

function foo(array) {
    var result = 0;
    for (var i = array.length - 1; i >= 0; i--)
        result += array[i];
    return result;
}

function foo(array) {
    var result = 0;
    for (var i = array.length; i--;)
        result += array[i];
    return result;
}

function foo(array) {
    var result = 0;
    for (var i = 0; i != array.length; ++i)
        result += array[i];
    return result;
}

[Filip Pizlo]

Created attachment 254673 [details]
it's starting to pass tests

[Filip Pizlo]

This is so much win.


Benchmark report for SunSpider, LongSpider, V8Spider, Octane, Kraken, JSRegress, AsmBench, and CompressionBench on dethklok (MacBookPro9,1).

VMs tested:
"TipOfTree" at /Volumes/Data/pizlo/secondary/OpenSource/WebKitBuild/Release/jsc (r185429)
"ABC" at /Volumes/Data/pizlo/tertiary/OpenSource/WebKitBuild/Release/jsc (r185429)

Collected 6 samples per benchmark/VM, with 6 VM invocations per benchmark. Emitted a call to gc() between sample measurements.
Used 1 benchmark iteration per VM invocation for warm-up. Used the jsc-specific preciseTime() function to get microsecond-level
timing. Reporting benchmark execution times with 95% confidence intervals in milliseconds.

                                                        TipOfTree                    ABC                                        
SunSpider:
   3d-cube                                            5.2522+-0.0637     ?      5.3453+-0.0754        ? might be 1.0177x slower
   3d-morph                                           6.0955+-0.6972     ?      6.6495+-0.6699        ? might be 1.0909x slower
   3d-raytrace                                        6.9005+-0.5144            6.4329+-0.0821          might be 1.0727x faster
   access-binary-trees                                2.4729+-0.2068     ?      2.5024+-0.2880        ? might be 1.0119x slower
   access-fannkuch                                    6.2685+-0.1210     ?      6.2915+-0.1741        ?
   access-nbody                                       3.0662+-0.2447     ?      3.2768+-0.5420        ? might be 1.0687x slower
   access-nsieve                                      3.4585+-0.3304            3.4557+-0.0792        
   bitops-3bit-bits-in-byte                           1.7137+-0.2047            1.6460+-0.0639          might be 1.0411x faster
   bitops-bits-in-byte                                3.9757+-0.2052            3.8198+-0.3107          might be 1.0408x faster
   bitops-bitwise-and                                 2.1706+-0.1078            2.1613+-0.0365        
   bitops-nsieve-bits                                 3.3831+-0.1320     ^      3.2180+-0.0130        ^ definitely 1.0513x faster
   controlflow-recursive                              2.9090+-0.1822            2.8485+-0.1766          might be 1.0212x faster
   crypto-aes                                         4.9152+-0.4821     ?      4.9432+-0.3993        ?
   crypto-md5                                         2.7442+-0.0922     ?      2.8453+-0.2650        ? might be 1.0368x slower
   crypto-sha1                                        3.7282+-0.2250            3.6643+-0.2416          might be 1.0174x faster
   date-format-tofte                                  9.2598+-0.0769     ?      9.5358+-0.3491        ? might be 1.0298x slower
   date-format-xparb                                  6.5205+-0.7261            6.1547+-0.2730          might be 1.0594x faster
   math-cordic                                        3.2450+-0.2680     ?      3.2911+-0.4410        ? might be 1.0142x slower
   math-partial-sums                                  5.6660+-0.3710     ?      5.7195+-0.7247        ?
   math-spectral-norm                                 2.0806+-0.0578     ?      2.2413+-0.3977        ? might be 1.0772x slower
   regexp-dna                                         7.5214+-0.1283     ?      7.5908+-0.1729        ?
   string-base64                                      5.2126+-0.4598     ?      5.7705+-0.8675        ? might be 1.1070x slower
   string-fasta                                       7.1652+-0.1449            7.1287+-0.1970        
   string-tagcloud                                   10.2728+-0.9067     ?     10.4488+-1.1835        ? might be 1.0171x slower
   string-unpack-code                                20.8645+-0.7341     ?     20.9869+-1.2084        ?
   string-validate-input                              6.1214+-0.3828            5.9665+-0.0707          might be 1.0260x faster

   <arithmetic>                                       5.4994+-0.0748     ?      5.5360+-0.0873        ? might be 1.0067x slower

                                                        TipOfTree                    ABC                                        
LongSpider:
   3d-cube                                          893.4778+-4.2977     !   1125.5387+-14.9048       ! definitely 1.2597x slower
   3d-morph                                        1529.4853+-4.4786     ?   1531.2384+-6.3730        ?
   3d-raytrace                                      694.9364+-3.3910     ?    714.1325+-48.1731       ? might be 1.0276x slower
   access-binary-trees                             1009.9510+-5.4842         1007.2894+-7.8937        
   access-fannkuch                                  351.6922+-8.5923          339.1489+-9.6560          might be 1.0370x faster
   access-nbody                                     589.1946+-1.2794     ?    589.8350+-2.2589        ?
   access-nsieve                                    485.8809+-18.3256         477.5903+-7.8611          might be 1.0174x faster
   bitops-3bit-bits-in-byte                          44.9884+-1.1205           44.5340+-0.8889          might be 1.0102x faster
   bitops-bits-in-byte                               99.9028+-2.5101     ?    100.3802+-0.9174        ?
   bitops-nsieve-bits                               421.4715+-4.9817          418.6126+-1.1040        
   controlflow-recursive                            484.8502+-11.1032         481.7343+-10.6275       
   crypto-aes                                       703.5952+-7.4370     ^    673.3990+-2.1696        ^ definitely 1.0448x faster
   crypto-md5                                       520.8144+-1.8768     ?    534.5755+-14.1932       ? might be 1.0264x slower
   crypto-sha1                                      720.4084+-73.5653         663.6917+-23.9593         might be 1.0855x faster
   date-format-tofte                                724.8421+-31.0369         714.3639+-8.3922          might be 1.0147x faster
   date-format-xparb                                811.7282+-64.4451         783.9195+-26.4259         might be 1.0355x faster
   hash-map                                         185.9707+-2.5719     ?    187.3777+-2.7201        ?
   math-cordic                                      578.5213+-4.7902          576.9253+-3.0887        
   math-partial-sums                                513.4990+-16.9964         508.5806+-2.1580        
   math-spectral-norm                               565.7807+-2.4077     !    570.3999+-1.8634        ! definitely 1.0082x slower
   string-base64                                    414.2543+-7.5637          413.0341+-4.2902        
   string-fasta                                     430.0909+-4.1215          427.3119+-2.9265        
   string-tagcloud                                  195.5827+-5.6611     ?    197.2655+-3.8996        ?

   <geometric>                                      456.7465+-3.4301     ?    457.6106+-2.1812        ? might be 1.0019x slower

                                                        TipOfTree                    ABC                                        
V8Spider:
   crypto                                            55.7027+-2.7066     ?     58.1624+-1.9861        ? might be 1.0442x slower
   deltablue                                         96.6455+-4.0267     ?     98.4035+-4.9706        ? might be 1.0182x slower
   earley-boyer                                      51.2510+-0.7040           50.6565+-0.8714          might be 1.0117x faster
   raytrace                                          42.1466+-2.3508     ?     43.4004+-1.7906        ? might be 1.0297x slower
   regexp                                            92.2725+-27.6754          84.2625+-2.2560          might be 1.0951x faster
   richards                                          87.2644+-7.1476           86.5339+-2.9325        
   splay                                             41.0767+-1.5322           39.9309+-1.7434          might be 1.0287x faster

   <geometric>                                       62.5474+-3.0063           62.3269+-1.1192          might be 1.0035x faster

                                                        TipOfTree                    ABC                                        
Octane:
   encrypt                                           0.20285+-0.00081    ^     0.19739+-0.00108       ^ definitely 1.0277x faster
   decrypt                                           3.65538+-0.05928    ^     3.35824+-0.01085       ^ definitely 1.0885x faster
   deltablue                                x2       0.19371+-0.00191          0.18965+-0.00292         might be 1.0214x faster
   earley                                            0.39091+-0.00444    ?     0.40227+-0.00822       ? might be 1.0291x slower
   boyer                                             6.99226+-0.38100          6.96921+-0.28905       
   navier-stokes                            x2       5.17783+-0.01189    ^     5.13246+-0.01985       ^ definitely 1.0088x faster
   raytrace                                 x2       1.32033+-0.04674    ?     1.32538+-0.05274       ?
   richards                                 x2       0.13549+-0.00482    ?     0.14440+-0.01819       ? might be 1.0658x slower
   splay                                    x2       0.41237+-0.03194          0.40210+-0.00661         might be 1.0255x faster
   regexp                                   x2      31.62929+-0.65396    ?    32.79144+-1.94677       ? might be 1.0367x slower
   pdfjs                                    x2      42.46285+-0.27487    ?    42.54016+-0.35845       ?
   mandreel                                 x2      51.31800+-0.32065    ^    50.25441+-0.62393       ^ definitely 1.0212x faster
   gbemu                                    x2      45.76554+-3.93118         45.48865+-2.52585       
   closure                                           0.56266+-0.00343    ?     0.56567+-0.00328       ?
   jquery                                            7.35740+-0.05259    ?     7.61338+-0.57767       ? might be 1.0348x slower
   box2d                                    x2      13.15896+-0.84837         12.79954+-0.09940         might be 1.0281x faster
   zlib                                     x2     385.96742+-17.01030   ?   397.56117+-5.22140       ? might be 1.0300x slower
   typescript                               x2     778.54810+-4.58329        775.21724+-7.37991       

   <geometric>                                       6.73337+-0.07607          6.73142+-0.07542         might be 1.0003x faster

                                                        TipOfTree                    ABC                                        
Kraken:
   ai-astar                                          239.083+-11.765     ^     219.571+-1.176         ^ definitely 1.0889x faster
   audio-beat-detection                               82.150+-1.289      ?      83.038+-3.477         ? might be 1.0108x slower
   audio-dft                                         120.988+-3.263            119.290+-1.815           might be 1.0142x faster
   audio-fft                                          71.154+-2.527      ?      71.335+-2.109         ?
   audio-oscillator                                   90.611+-1.422             89.253+-0.484           might be 1.0152x faster
   imaging-darkroom                                  104.986+-1.860      ?     105.198+-2.032         ?
   imaging-desaturate                                 65.188+-2.756             61.472+-1.336           might be 1.0604x faster
   imaging-gaussian-blur                             112.915+-7.053            107.833+-2.311           might be 1.0471x faster
   json-parse-financial                               48.038+-1.565             46.412+-1.652           might be 1.0350x faster
   json-stringify-tinderbox                           29.408+-1.629      ?      30.660+-3.014         ? might be 1.0426x slower
   stanford-crypto-aes                                58.172+-1.052      ?      58.742+-0.423         ?
   stanford-crypto-ccm                                49.042+-1.354             47.664+-0.995           might be 1.0289x faster
   stanford-crypto-pbkdf2                            111.586+-3.286            109.668+-1.530           might be 1.0175x faster
   stanford-crypto-sha256-iterative                   43.277+-1.208      ?      44.232+-2.329         ? might be 1.0221x slower

   <arithmetic>                                       87.614+-1.126      ^      85.312+-0.594         ^ definitely 1.0270x faster

                                                        TipOfTree                    ABC                                        
JSRegress:
   abc-forward-loop-equal                            75.3774+-3.5549     ^     47.8453+-1.5054        ^ definitely 1.5754x faster
   abc-postfix-backward-loop                         74.1728+-2.1592     ^     47.3682+-1.3506        ^ definitely 1.5659x faster
   abc-simple-backward-loop                          72.4122+-1.5056     ^     47.1067+-1.3252        ^ definitely 1.5372x faster
   abc-simple-forward-loop                           73.6608+-2.7843     ^     47.4704+-1.5804        ^ definitely 1.5517x faster
   abs-boolean                                        2.8088+-0.3358            2.7163+-0.0870          might be 1.0341x faster
   adapt-to-double-divide                            16.8056+-0.5408           16.6285+-0.1994          might be 1.0106x faster
   aliased-arguments-getbyval                         1.4012+-0.2125            1.3156+-0.0592          might be 1.0650x faster
   allocate-big-object                                2.9568+-0.1464     ?      2.9953+-0.1636        ? might be 1.0130x slower
   arguments-named-and-reflective                    12.4707+-0.2785     ?     13.2434+-0.9065        ? might be 1.0620x slower
   arguments-out-of-bounds                           14.7793+-0.7089           14.7371+-0.6646        
   arguments-strict-mode                             10.9108+-1.0062     ?     11.3059+-0.9263        ? might be 1.0362x slower
   arguments                                         10.1280+-1.0863     ?     10.6556+-0.8521        ? might be 1.0521x slower
   arity-mismatch-inlining                            0.8606+-0.0197     ?      0.9046+-0.0631        ? might be 1.0512x slower
   array-access-polymorphic-structure                 7.3223+-0.9251     ?      7.3725+-0.9116        ?
   array-nonarray-polymorhpic-access                 33.0256+-0.8787           32.6584+-0.8839          might be 1.0112x faster
   array-prototype-every                             85.8985+-2.9017     ?     88.7367+-3.5504        ? might be 1.0330x slower
   array-prototype-forEach                           83.2795+-3.3836     ?     84.7211+-2.6273        ? might be 1.0173x slower
   array-prototype-map                               94.6956+-5.6371           92.2486+-2.3710          might be 1.0265x faster
   array-prototype-reduce                            81.0990+-2.0881     ?     82.4751+-1.5355        ? might be 1.0170x slower
   array-prototype-reduceRight                       81.7428+-2.5749     ?     82.4523+-3.3261        ?
   array-prototype-some                              85.4868+-4.3089     ?     88.6150+-2.9410        ? might be 1.0366x slower
   array-splice-contiguous                           41.3377+-1.5385     ?     42.7027+-1.7323        ? might be 1.0330x slower
   array-with-double-add                              4.5020+-0.3640            4.4332+-0.4273          might be 1.0155x faster
   array-with-double-increment                        3.4929+-0.2670            3.2608+-0.0276          might be 1.0712x faster
   array-with-double-mul-add                          5.2268+-0.1595     ?      5.2456+-0.0956        ?
   array-with-double-sum                              3.7229+-0.6865            3.3477+-0.0585          might be 1.1121x faster
   array-with-int32-add-sub                           6.9163+-0.0870            6.8372+-0.0874          might be 1.0116x faster
   array-with-int32-or-double-sum                     3.4281+-0.0667            3.3877+-0.0605          might be 1.0119x faster
   ArrayBuffer-DataView-alloc-large-long-lived   
                                                     37.1376+-1.4109     ?     38.5622+-2.8303        ? might be 1.0384x slower
   ArrayBuffer-DataView-alloc-long-lived             15.1954+-1.5141     ?     15.6905+-1.9657        ? might be 1.0326x slower
   ArrayBuffer-Int32Array-byteOffset                  3.8742+-0.3285     ?      4.1673+-0.4446        ? might be 1.0757x slower
   ArrayBuffer-Int8Array-alloc-large-long-lived   
                                                     38.4498+-1.1179     ?     40.0710+-2.4725        ? might be 1.0422x slower
   ArrayBuffer-Int8Array-alloc-long-lived-buffer   
                                                     24.0767+-2.0528           23.2297+-2.3103          might be 1.0365x faster
   ArrayBuffer-Int8Array-alloc-long-lived            13.7183+-0.3784     ?     14.1246+-1.4691        ? might be 1.0296x slower
   ArrayBuffer-Int8Array-alloc                       10.7337+-0.2665     ?     11.5194+-1.8108        ? might be 1.0732x slower
   asmjs_bool_bug                                     7.8251+-0.2019            7.7767+-0.2162        
   assign-custom-setter-polymorphic                   3.3092+-0.0822            3.2386+-0.3639          might be 1.0218x faster
   assign-custom-setter                               5.0907+-0.8878            4.3376+-0.3387          might be 1.1736x faster
   basic-set                                          9.6776+-0.6905            9.5453+-0.2849          might be 1.0139x faster
   big-int-mul                                        4.5255+-0.3373     ^      4.0625+-0.0654        ^ definitely 1.1140x faster
   boolean-test                                       3.2496+-0.3687     ?      3.3581+-0.2122        ? might be 1.0334x slower
   branch-fold                                        4.2360+-0.4902            4.0019+-0.1961          might be 1.0585x faster
   branch-on-string-as-boolean                       20.5280+-0.5171     ?     22.4296+-1.6887        ? might be 1.0926x slower
   by-val-generic                                     8.5166+-0.3107            8.5102+-0.2323        
   call-spread-apply                                 30.5061+-1.3819           30.3291+-1.6474        
   call-spread-call                                  26.6980+-1.6376           25.4113+-0.6864          might be 1.0506x faster
   captured-assignments                               0.5507+-0.0542     ?      0.5601+-0.0631        ? might be 1.0171x slower
   cast-int-to-double                                 5.3283+-0.0608            5.3105+-0.0366        
   cell-argument                                      8.6000+-0.2663     ?      8.7522+-0.2699        ? might be 1.0177x slower
   cfg-simplify                                       2.9813+-0.3132            2.9375+-0.1878          might be 1.0149x faster
   chain-getter-access                                9.7462+-0.8438            9.4107+-0.2031          might be 1.0356x faster
   cmpeq-obj-to-obj-other                            12.6137+-0.3902           11.8312+-0.4621          might be 1.0661x faster
   constant-test                                      5.0288+-0.0281     ?      5.2840+-0.7559        ? might be 1.0507x slower
   create-lots-of-functions                          11.7549+-0.3196     ?     11.8339+-0.5868        ?
   cse-new-array-buffer                               2.5860+-0.1168     ?      2.6790+-0.2678        ? might be 1.0360x slower
   cse-new-array                                      2.6932+-0.1243     ?      2.6988+-0.1029        ?
   DataView-custom-properties                        43.8945+-1.8256           42.8975+-1.4967          might be 1.0232x faster
   deconstructing-parameters-overridden-by-function   
                                                      0.5804+-0.0283     ?      0.6008+-0.0934        ? might be 1.0351x slower
   delay-tear-off-arguments-strictmode               14.7775+-0.5230           14.2266+-0.2785          might be 1.0387x faster
   deltablue-varargs                                247.5038+-2.2917     ?    249.2660+-2.4610        ?
   destructuring-arguments                           17.3858+-0.4469     ?     17.6112+-0.9052        ? might be 1.0130x slower
   destructuring-swap                                 5.4111+-0.4472            5.1683+-0.1447          might be 1.0470x faster
   direct-arguments-getbyval                          1.4550+-0.2212            1.3228+-0.0847          might be 1.0999x faster
   div-boolean-double                                 5.3105+-0.1151     ?      5.3567+-0.1668        ?
   div-boolean                                        8.0617+-0.3088            7.9350+-0.1601          might be 1.0160x faster
   double-get-by-val-out-of-bounds                    4.7452+-0.2525            4.5974+-0.0461          might be 1.0322x faster
   double-pollution-getbyval                          8.9469+-0.0641     ?      9.0156+-0.2396        ?
   double-pollution-putbyoffset                       4.4755+-0.1257     ?      4.4887+-0.1962        ?
   double-real-use                                   29.9420+-0.6770     ?     31.5201+-1.7683        ? might be 1.0527x slower
   double-to-int32-typed-array-no-inline              2.6657+-0.1737            2.4150+-0.1649          might be 1.1038x faster
   double-to-int32-typed-array                        2.0288+-0.1556     ?      2.0494+-0.1775        ? might be 1.0102x slower
   double-to-uint32-typed-array-no-inline             2.6318+-0.1879     ?      2.8346+-0.2313        ? might be 1.0771x slower
   double-to-uint32-typed-array                       2.2504+-0.3760     ?      2.2588+-0.4819        ?
   elidable-new-object-dag                           44.3819+-1.7523           43.7157+-2.1059          might be 1.0152x faster
   elidable-new-object-roflcopter                    44.7461+-0.9156     ?     45.5520+-1.3921        ? might be 1.0180x slower
   elidable-new-object-then-call                     40.2166+-1.5685     ?     40.3070+-1.6023        ?
   elidable-new-object-tree                          46.4867+-0.7588           45.6503+-0.8967          might be 1.0183x faster
   empty-string-plus-int                              5.7586+-0.2323            5.5883+-0.1708          might be 1.0305x faster
   emscripten-cube2hash                              38.3882+-1.6519     ?     39.0316+-1.1717        ? might be 1.0168x slower
   exit-length-on-plain-object                       14.2195+-0.5448     ?     14.9981+-1.2581        ? might be 1.0548x slower
   external-arguments-getbyval                        1.3781+-0.0848            1.2575+-0.0780          might be 1.0959x faster
   external-arguments-putbyval                        2.4806+-0.1078            2.4443+-0.1261          might be 1.0148x faster
   fixed-typed-array-storage-var-index                1.2923+-0.0251            1.2537+-0.0822          might be 1.0308x faster
   fixed-typed-array-storage                          0.9991+-0.1257     ?      1.0522+-0.2782        ? might be 1.0532x slower
   Float32Array-matrix-mult                           4.6896+-0.2206     ?      4.9040+-0.7689        ? might be 1.0457x slower
   Float32Array-to-Float64Array-set                  56.7085+-1.1478     ^     53.0980+-1.5046        ^ definitely 1.0680x faster
   Float64Array-alloc-long-lived                     88.6842+-1.7099           88.0547+-1.2654        
   Float64Array-to-Int16Array-set                    69.9187+-1.3835     ?     71.1616+-0.3354        ? might be 1.0178x slower
   fold-double-to-int                                13.9430+-0.5594           13.9371+-0.7076        
   fold-get-by-id-to-multi-get-by-offset-rare-int   
                                                     11.0474+-1.4521           10.7326+-0.8661          might be 1.0293x faster
   fold-get-by-id-to-multi-get-by-offset             10.7014+-1.1219     ?     10.7251+-1.2815        ?
   fold-multi-get-by-offset-to-get-by-offset   
                                                      9.0004+-1.5619     ?      9.7424+-1.1130        ? might be 1.0824x slower
   fold-multi-get-by-offset-to-poly-get-by-offset   
                                                      8.7856+-0.6613     ?      8.8689+-1.2596        ?
   fold-multi-put-by-offset-to-poly-put-by-offset   
                                                      9.9988+-0.7373            9.6727+-1.1343          might be 1.0337x faster
   fold-multi-put-by-offset-to-put-by-offset   
                                                      7.5928+-0.5480     ?      7.6893+-1.1035        ? might be 1.0127x slower
   fold-multi-put-by-offset-to-replace-or-transition-put-by-offset   
                                                      9.9873+-0.3813     ?     10.0739+-0.3975        ?
   fold-put-by-id-to-multi-put-by-offset             10.3665+-1.4604     ?     10.5044+-1.2599        ? might be 1.0133x slower
   fold-put-structure                                 8.2544+-0.6664            7.3497+-1.4782          might be 1.1231x faster
   for-of-iterate-array-entries                       4.7482+-0.2403            4.7017+-0.2235        
   for-of-iterate-array-keys                          3.7830+-0.1125     ?      4.1432+-0.4748        ? might be 1.0952x slower
   for-of-iterate-array-values                        3.7236+-0.3282            3.6718+-0.2302          might be 1.0141x faster
   fround                                            21.5612+-0.7981           21.5582+-0.5902        
   ftl-library-inlining-dataview                     65.2191+-1.8325     ?     66.5548+-3.6585        ? might be 1.0205x slower
   ftl-library-inlining                              66.7288+-0.2653     ?     75.5047+-18.4948       ? might be 1.1315x slower
   function-dot-apply                                 2.5102+-0.4472            2.3799+-0.2682          might be 1.0547x faster
   function-test                                      2.9355+-0.0207     ?      3.0136+-0.1607        ? might be 1.0266x slower
   function-with-eval                               105.4561+-4.3288     ?    106.7240+-4.3207        ? might be 1.0120x slower
   gcse-poly-get-less-obvious                        19.2033+-0.9650           18.8009+-0.4517          might be 1.0214x faster
   gcse-poly-get                                     20.4542+-1.2201           19.7128+-0.8873          might be 1.0376x faster
   gcse                                               4.4358+-0.0850            4.3538+-0.0527          might be 1.0188x faster
   get-by-id-bimorphic-check-structure-elimination-simple   
                                                      2.8761+-0.2561            2.8062+-0.0856          might be 1.0249x faster
   get-by-id-bimorphic-check-structure-elimination   
                                                      6.0948+-0.1446     ?      6.1870+-0.1959        ? might be 1.0151x slower
   get-by-id-chain-from-try-block                     6.9343+-0.7729            6.5419+-0.0758          might be 1.0600x faster
   get-by-id-check-structure-elimination              5.4994+-0.5786            5.2740+-0.2191          might be 1.0427x faster
   get-by-id-proto-or-self                           18.9292+-1.0148     ?     19.0758+-1.8601        ?
   get-by-id-quadmorphic-check-structure-elimination-simple   
                                                      2.9965+-0.0570     ?      3.1601+-0.1453        ? might be 1.0546x slower
   get-by-id-self-or-proto                           19.1013+-2.0658     ?     19.4988+-1.8638        ? might be 1.0208x slower
   get-by-val-out-of-bounds                           4.5004+-0.1437     ?      4.5832+-0.2495        ? might be 1.0184x slower
   get_callee_monomorphic                             3.2618+-0.7912            2.9971+-0.2376          might be 1.0883x faster
   get_callee_polymorphic                             3.8188+-0.1670     ?      3.9092+-0.3501        ? might be 1.0237x slower
   getter-no-activation                               5.3545+-0.4195            5.2229+-0.3908          might be 1.0252x faster
   getter-prototype                                  15.6335+-0.6049           15.3507+-0.9126          might be 1.0184x faster
   getter-richards                                  134.7804+-7.3646          132.6525+-5.7563          might be 1.0160x faster
   getter                                             6.3554+-0.9512            6.0685+-0.6731          might be 1.0473x faster
   global-var-const-infer-fire-from-opt               0.9745+-0.0647     ?      0.9844+-0.1082        ? might be 1.0101x slower
   global-var-const-infer                             0.9770+-0.2057     ?      1.0829+-0.2418        ? might be 1.1084x slower
   HashMap-put-get-iterate-keys                      31.8450+-2.1292           31.3839+-2.3621          might be 1.0147x faster
   HashMap-put-get-iterate                           34.3000+-3.1986           31.1834+-2.2528          might be 1.0999x faster
   HashMap-string-put-get-iterate                    33.2100+-0.9256     ?     33.6555+-0.7665        ? might be 1.0134x slower
   hoist-make-rope                                   12.2407+-1.2655     ?     12.7043+-1.3905        ? might be 1.0379x slower
   hoist-poly-check-structure-effectful-loop   
                                                      5.1443+-0.0938     ?      5.2280+-0.1729        ? might be 1.0163x slower
   hoist-poly-check-structure                         3.8209+-0.1111     ?      3.8539+-0.2640        ?
   imul-double-only                                   8.8237+-0.5224     ?      9.9184+-1.3223        ? might be 1.1241x slower
   imul-int-only                                      9.9987+-0.2673            9.8683+-0.0766          might be 1.0132x faster
   imul-mixed                                         8.3538+-0.3140     ?      9.6095+-2.5970        ? might be 1.1503x slower
   in-four-cases                                     22.4460+-0.4560           22.2763+-0.2597        
   in-one-case-false                                 11.1415+-0.1228     ?     11.3938+-0.3908        ? might be 1.0226x slower
   in-one-case-true                                  11.0500+-0.0853     ?     11.5031+-0.6740        ? might be 1.0410x slower
   in-two-cases                                      11.7533+-0.3227           11.6383+-0.0671        
   indexed-properties-in-objects                      3.0313+-0.1268            2.9819+-0.0988          might be 1.0166x faster
   infer-closure-const-then-mov-no-inline             4.5965+-0.7448            3.9635+-0.0609          might be 1.1597x faster
   infer-closure-const-then-mov                      20.0339+-0.3590           19.7205+-0.2441          might be 1.0159x faster
   infer-closure-const-then-put-to-scope-no-inline   
                                                     13.0111+-0.6656           12.9114+-0.4654        
   infer-closure-const-then-put-to-scope             21.5252+-0.5158     ?     21.9180+-1.0052        ? might be 1.0182x slower
   infer-closure-const-then-reenter-no-inline   
                                                     55.0421+-0.9203           54.2729+-1.1233          might be 1.0142x faster
   infer-closure-const-then-reenter                  22.6346+-1.0429           22.3550+-0.6938          might be 1.0125x faster
   infer-constant-global-property                     3.6468+-0.1388            3.6075+-0.1222          might be 1.0109x faster
   infer-constant-property                            2.9751+-0.4164            2.9200+-0.3513          might be 1.0189x faster
   infer-one-time-closure-ten-vars                   12.8461+-0.7024     ?     13.2059+-1.0415        ? might be 1.0280x slower
   infer-one-time-closure-two-vars                   12.7457+-1.4275     ?     12.9932+-1.3159        ? might be 1.0194x slower
   infer-one-time-closure                            12.4598+-0.6661     ?     13.4301+-1.6650        ? might be 1.0779x slower
   infer-one-time-deep-closure                       21.7930+-1.4343           21.5463+-1.1718          might be 1.0114x faster
   inline-arguments-access                            5.0683+-0.4439            4.7666+-0.1743          might be 1.0633x faster
   inline-arguments-aliased-access                    4.7885+-0.3912            4.6746+-0.1380          might be 1.0243x faster
   inline-arguments-local-escape                      4.6592+-0.0499     ?      4.6850+-0.0696        ?
   inline-get-scoped-var                              4.8912+-0.1390     ?      4.8951+-0.1528        ?
   inlined-put-by-id-transition                      12.4661+-0.5212           12.2018+-1.0271          might be 1.0217x faster
   int-or-other-abs-then-get-by-val                   5.0776+-0.0776            5.0597+-0.1409        
   int-or-other-abs-zero-then-get-by-val             17.5265+-0.2930     ?     17.7052+-0.8847        ? might be 1.0102x slower
   int-or-other-add-then-get-by-val                   4.4357+-0.1547            4.3669+-0.0226          might be 1.0157x faster
   int-or-other-add                                   5.5638+-0.2037     ?      5.6377+-0.4717        ? might be 1.0133x slower
   int-or-other-div-then-get-by-val                   4.3710+-0.1106            4.3343+-0.1779        
   int-or-other-max-then-get-by-val                   4.5190+-0.2978            4.5103+-0.3118        
   int-or-other-min-then-get-by-val                   4.3526+-0.0266     ?      4.4343+-0.1739        ? might be 1.0188x slower
   int-or-other-mod-then-get-by-val                   3.9632+-0.0387     ?      4.0865+-0.2168        ? might be 1.0311x slower
   int-or-other-mul-then-get-by-val                   4.0070+-0.0706     ?      4.1124+-0.3533        ? might be 1.0263x slower
   int-or-other-neg-then-get-by-val                   4.9795+-0.4141            4.8464+-0.0740          might be 1.0275x faster
   int-or-other-neg-zero-then-get-by-val             18.4338+-1.4504     ?     20.2390+-4.2630        ? might be 1.0979x slower
   int-or-other-sub-then-get-by-val                   4.4826+-0.1827     ?      4.5574+-0.4279        ? might be 1.0167x slower
   int-or-other-sub                                   3.8208+-0.3274            3.6892+-0.1406          might be 1.0357x faster
   int-overflow-local                                 4.5694+-0.0332     ?      4.5916+-0.0389        ?
   Int16Array-alloc-long-lived                       52.7960+-0.9886     ?     53.1394+-1.7736        ?
   Int16Array-bubble-sort-with-byteLength            20.5752+-1.5240           20.5035+-0.9296        
   Int16Array-bubble-sort                            20.9473+-0.9913           20.8058+-1.3404        
   Int16Array-load-int-mul                            1.6203+-0.1864            1.5389+-0.0537          might be 1.0529x faster
   Int16Array-to-Int32Array-set                      56.7273+-1.8823           56.1931+-1.5213        
   Int32Array-alloc-large                            24.8308+-1.7008           24.4211+-0.7459          might be 1.0168x faster
   Int32Array-alloc-long-lived                       63.4379+-1.1433     ?     64.0446+-0.6727        ?
   Int32Array-alloc                                   3.6144+-0.3962     ?      3.6787+-0.5701        ? might be 1.0178x slower
   Int32Array-Int8Array-view-alloc                    7.1302+-0.8118            6.7197+-0.3091          might be 1.0611x faster
   int52-spill                                        5.6859+-0.1007     ?      5.7664+-0.0734        ? might be 1.0141x slower
   Int8Array-alloc-long-lived                        49.1965+-2.2792           48.9821+-2.0092        
   Int8Array-load-with-byteLength                     3.6831+-0.3908            3.4236+-0.0404          might be 1.0758x faster
   Int8Array-load                                     3.5141+-0.1522     ?      3.6687+-0.3961        ? might be 1.0440x slower
   integer-divide                                    11.2480+-0.3004           11.0696+-0.3717          might be 1.0161x faster
   integer-modulo                                     2.2475+-0.2738            2.1560+-0.0929          might be 1.0424x faster
   is-boolean-fold-tricky                             4.4791+-0.0884     ?      4.4986+-0.0414        ?
   is-boolean-fold                                    2.9380+-0.1221            2.9000+-0.1478          might be 1.0131x faster
   is-function-fold-tricky-internal-function   
                                                     12.0419+-0.1709     ?     12.7079+-1.2483        ? might be 1.0553x slower
   is-function-fold-tricky                            4.9500+-0.4911            4.5997+-0.0830          might be 1.0762x faster
   is-function-fold                                   3.0971+-0.3009            3.0736+-0.3746        
   is-number-fold-tricky                              4.5676+-0.2181     ?      4.6206+-0.1304        ? might be 1.0116x slower
   is-number-fold                                     2.9073+-0.0385            2.9053+-0.1224        
   is-object-or-null-fold-functions                   3.1860+-0.3112            3.0857+-0.3883          might be 1.0325x faster
   is-object-or-null-fold-less-tricky                 4.5764+-0.1650     ?      4.8550+-0.4270        ? might be 1.0609x slower
   is-object-or-null-fold-tricky                      6.6755+-0.0641     ?      6.6937+-0.1089        ?
   is-object-or-null-fold                             2.9935+-0.1090            2.8755+-0.0283          might be 1.0410x faster
   is-object-or-null-trickier-function                4.6710+-0.1520     ?      5.0263+-0.4400        ? might be 1.0761x slower
   is-object-or-null-trickier-internal-function   
                                                     12.7232+-0.3713     ?     13.7996+-1.7587        ? might be 1.0846x slower
   is-object-or-null-tricky-function                  4.7909+-0.3689            4.7909+-0.2309        
   is-object-or-null-tricky-internal-function   
                                                      9.5022+-0.2475     ?      9.7397+-0.7677        ? might be 1.0250x slower
   is-string-fold-tricky                              4.5712+-0.2380     ?      4.6450+-0.2204        ? might be 1.0161x slower
   is-string-fold                                     3.0743+-0.3203            2.8646+-0.0810          might be 1.0732x faster
   is-undefined-fold-tricky                           3.8168+-0.0926     ?      3.8989+-0.2098        ? might be 1.0215x slower
   is-undefined-fold                                  3.0251+-0.3697     ?      3.0463+-0.3585        ?
   large-int-captured                                 4.8487+-0.1050     ?      4.9942+-0.2301        ? might be 1.0300x slower
   large-int-neg                                     16.9314+-1.2634           16.8657+-0.7946        
   large-int                                         16.4041+-2.6050           15.3085+-1.6129          might be 1.0716x faster
   load-varargs-elimination                          23.2752+-0.4936     ?     24.1651+-1.9781        ? might be 1.0382x slower
   logical-not-weird-types                            3.3204+-0.0998     ?      3.4236+-0.1848        ? might be 1.0311x slower
   logical-not                                        5.2036+-1.3052            4.6563+-0.0516          might be 1.1175x faster
   lots-of-fields                                    12.2292+-0.2119     ?     12.3655+-0.1011        ? might be 1.0111x slower
   make-indexed-storage                               3.2586+-0.4297     ?      3.3129+-0.3744        ? might be 1.0166x slower
   make-rope-cse                                     12.4507+-1.1125     ?     13.2835+-1.3802        ? might be 1.0669x slower
   marsaglia-larger-ints                             36.4821+-0.8588     ?     38.3978+-2.4731        ? might be 1.0525x slower
   marsaglia-osr-entry                               23.9025+-1.6352           23.3490+-0.4819          might be 1.0237x faster
   math-with-out-of-bounds-array-values              24.9624+-0.6751           23.9163+-0.6323          might be 1.0437x faster
   max-boolean                                        2.5660+-0.0633            2.5124+-0.0471          might be 1.0213x faster
   method-on-number                                  18.2350+-0.7152           17.6905+-0.4468          might be 1.0308x faster
   min-boolean                                        2.7280+-0.2994            2.5045+-0.0238          might be 1.0893x faster
   minus-boolean-double                               3.2909+-0.1450            3.2832+-0.0919        
   minus-boolean                                      2.4595+-0.1252     ?      2.5841+-0.4671        ? might be 1.0507x slower
   misc-strict-eq                                    39.6392+-0.9747           38.3512+-1.1700          might be 1.0336x faster
   mod-boolean-double                                11.0216+-0.1970           10.9122+-0.1312          might be 1.0100x faster
   mod-boolean                                        7.8948+-0.0826     ?      7.9404+-0.1432        ?
   mul-boolean-double                                 3.8795+-0.2749            3.8170+-0.1536          might be 1.0164x faster
   mul-boolean                                        3.2009+-0.4307            3.1224+-0.3546          might be 1.0251x faster
   neg-boolean                                        3.3785+-0.2586            3.1917+-0.0273          might be 1.0585x faster
   negative-zero-divide                               0.4061+-0.0425     ?      0.4112+-0.0277        ? might be 1.0125x slower
   negative-zero-modulo                               0.4082+-0.0460            0.4080+-0.0438        
   negative-zero-negate                               0.3873+-0.0604     ?      0.4148+-0.0935        ? might be 1.0710x slower
   nested-function-parsing                           41.8825+-2.8926           40.3062+-1.4413          might be 1.0391x faster
   new-array-buffer-dead                            112.6071+-1.3509          111.8824+-3.0027        
   new-array-buffer-push                              7.6626+-1.0624            7.0334+-0.2359          might be 1.0894x faster
   new-array-dead                                    19.6606+-1.5469           19.5090+-0.3781        
   new-array-push                                     7.3515+-1.3677            6.6348+-0.2392          might be 1.1080x faster
   no-inline-constructor                             41.2630+-1.8830           40.7146+-1.3859          might be 1.0135x faster
   number-test                                        3.1208+-0.0732     ?      3.1703+-0.1508        ? might be 1.0159x slower
   object-closure-call                                5.7198+-0.0303            5.7119+-0.0160        
   object-test                                        2.9261+-0.0518            2.9216+-0.1427        
   obvious-sink-pathology-taken                     144.3696+-4.7926          143.7350+-3.9397        
   obvious-sink-pathology                           132.7749+-2.1093     ?    133.3378+-2.7050        ?
   obviously-elidable-new-object                     36.2891+-1.3717           35.5871+-1.4511          might be 1.0197x faster
   plus-boolean-arith                                 2.5822+-0.0407     ?      2.6537+-0.3269        ? might be 1.0277x slower
   plus-boolean-double                                3.3415+-0.2132     ?      3.3597+-0.2834        ?
   plus-boolean                                       2.5417+-0.1103     ?      2.6486+-0.3213        ? might be 1.0421x slower
   poly-chain-access-different-prototypes-simple   
                                                      3.3324+-0.0858     ?      3.3440+-0.0442        ?
   poly-chain-access-different-prototypes             2.8354+-0.3366            2.6584+-0.2363          might be 1.0666x faster
   poly-chain-access-simpler                          3.4448+-0.1197     ?      3.5417+-0.4013        ? might be 1.0281x slower
   poly-chain-access                                  2.5884+-0.0158     ?      2.7445+-0.1596        ? might be 1.0603x slower
   poly-stricteq                                     61.1344+-2.1780           59.8724+-1.8982          might be 1.0211x faster
   polymorphic-array-call                             1.4302+-0.0862            1.3976+-0.0614          might be 1.0233x faster
   polymorphic-get-by-id                              3.3131+-0.1801            3.1737+-0.0339          might be 1.0439x faster
   polymorphic-put-by-id                             33.9239+-2.4388           32.2137+-1.9043          might be 1.0531x faster
   polymorphic-structure                             15.6589+-0.9997           15.2581+-0.7475          might be 1.0263x faster
   polyvariant-monomorphic-get-by-id                  8.6306+-0.1167     ?      8.6667+-0.1263        ?
   proto-getter-access                                9.5922+-0.2585            9.3617+-0.2046          might be 1.0246x faster
   put-by-id-replace-and-transition                   9.7788+-0.2816            9.6748+-0.1837          might be 1.0107x faster
   put-by-id-slightly-polymorphic                     2.9264+-0.1416            2.9131+-0.1131        
   put-by-id                                         12.8243+-0.3458     ?     12.9011+-0.3184        ?
   put-by-val-direct                                  0.4140+-0.0390     ?      0.4235+-0.0464        ? might be 1.0231x slower
   put-by-val-large-index-blank-indexing-type   
                                                     12.7731+-1.0667           12.5999+-1.2844          might be 1.0137x faster
   put-by-val-machine-int                             2.9362+-0.1228     ?      3.0000+-0.3390        ? might be 1.0218x slower
   rare-osr-exit-on-local                            15.1906+-0.4196     ?     15.3474+-0.4517        ? might be 1.0103x slower
   register-pressure-from-osr                         4.6191+-0.2874            4.4557+-0.0595          might be 1.0367x faster
   repeat-multi-get-by-offset                        24.6261+-0.3345     ?     24.8691+-0.4813        ?
   setter-prototype                                  10.5738+-0.2913     ?     10.5950+-0.1918        ?
   setter                                             6.5992+-0.9045            6.3722+-0.8996          might be 1.0356x faster
   simple-activation-demo                            25.3594+-1.1114     ?     25.9238+-1.3836        ? might be 1.0223x slower
   simple-getter-access                              12.2277+-1.2798           11.8415+-0.2083          might be 1.0326x faster
   simple-poly-call-nested                            8.2623+-0.2577     ?      8.3722+-0.7670        ? might be 1.0133x slower
   simple-poly-call                                   1.3537+-0.0860            1.3367+-0.0391          might be 1.0127x faster
   sin-boolean                                       23.9644+-1.5071           23.1274+-0.8079          might be 1.0362x faster
   singleton-scope                                   63.3407+-2.4090           63.1540+-1.9670        
   sink-function                                     12.4911+-0.3329     ?     12.8576+-0.7769        ? might be 1.0293x slower
   sink-huge-activation                              19.1983+-0.9434     ?     19.2520+-0.6571        ?
   sinkable-new-object-dag                           72.9355+-6.8371           71.2257+-0.8491          might be 1.0240x faster
   sinkable-new-object-taken                         51.1085+-2.8746     ?     56.7357+-3.7854        ? might be 1.1101x slower
   sinkable-new-object                               39.6759+-2.2480     ?     40.5074+-1.4712        ? might be 1.0210x slower
   slow-array-profile-convergence                     3.2616+-0.4616            3.1048+-0.3721          might be 1.0505x faster
   slow-convergence                                   3.9661+-0.5547            3.7228+-0.1287          might be 1.0654x faster
   slow-ternaries                                    20.7852+-2.8173     ?     22.1277+-1.9560        ? might be 1.0646x slower
   sorting-benchmark                                 19.4729+-0.6396           19.4694+-0.9927        
   sparse-conditional                                 1.2331+-0.1530     ?      1.2562+-0.0984        ? might be 1.0187x slower
   splice-to-remove                                  16.1715+-1.4076           16.0125+-1.3640        
   string-char-code-at                               16.2834+-0.1868     ?     17.1071+-1.2629        ? might be 1.0506x slower
   string-concat-object                               2.8222+-0.3954            2.6672+-0.1803          might be 1.0581x faster
   string-concat-pair-object                          2.7474+-0.2342     ?      2.7651+-0.3132        ?
   string-concat-pair-simple                         12.6751+-1.2947           11.8915+-0.3924          might be 1.0659x faster
   string-concat-simple                              12.6304+-1.0515           12.2992+-0.8564          might be 1.0269x faster
   string-cons-repeat                                 8.7845+-0.6525            8.0080+-0.2733          might be 1.0970x faster
   string-cons-tower                                  8.9521+-0.8767            8.3886+-0.5596          might be 1.0672x faster
   string-equality                                   18.3380+-1.2367     ?     18.4195+-0.8158        ?
   string-get-by-val-big-char                         7.4319+-0.5637            7.2170+-0.0610          might be 1.0298x faster
   string-get-by-val-out-of-bounds-insane             3.6762+-0.1125     ?      3.9624+-0.4809        ? might be 1.0779x slower
   string-get-by-val-out-of-bounds                    5.5040+-0.0419     ?      5.9184+-0.6679        ? might be 1.0753x slower
   string-get-by-val                                  3.4622+-0.0394     ?      3.6123+-0.3683        ? might be 1.0434x slower
   string-hash                                        2.2345+-0.2178            2.0970+-0.1102          might be 1.0656x faster
   string-long-ident-equality                        14.5144+-0.1500     ?     14.8630+-0.4418        ? might be 1.0240x slower
   string-out-of-bounds                              14.9540+-0.2555     ?     15.5554+-0.8906        ? might be 1.0402x slower
   string-repeat-arith                               34.2933+-1.3669           33.7427+-2.4550          might be 1.0163x faster
   string-sub                                        68.4407+-4.3276           66.3802+-2.7317          might be 1.0310x faster
   string-test                                        3.0449+-0.1047     ?      3.1334+-0.2613        ? might be 1.0291x slower
   string-var-equality                               34.3935+-1.8177           32.4599+-0.6365          might be 1.0596x faster
   structure-hoist-over-transitions                   2.8082+-0.1454            2.7729+-0.1855          might be 1.0127x faster
   substring-concat-weird                            44.0647+-6.1500           41.0913+-2.1720          might be 1.0724x faster
   substring-concat                                  43.3745+-1.3007           42.5035+-0.8560          might be 1.0205x faster
   substring                                         46.6376+-1.7047     ?     46.9411+-2.8114        ?
   switch-char-constant                               2.8822+-0.1340     ?      2.8887+-0.1465        ?
   switch-char                                        7.2725+-0.9559            7.0166+-0.8063          might be 1.0365x faster
   switch-constant                                    8.5747+-0.3210     ?      8.6440+-0.4173        ?
   switch-string-basic-big-var                       18.7152+-0.5142           18.4188+-0.3750          might be 1.0161x faster
   switch-string-basic-big                           15.0127+-0.3717     ?     15.0696+-0.6601        ?
   switch-string-basic-var                           15.7190+-0.9958           15.6875+-1.2207        
   switch-string-basic                               13.7335+-0.2325           13.6605+-0.2100        
   switch-string-big-length-tower-var                20.7775+-1.3132     ?     21.1073+-1.3631        ? might be 1.0159x slower
   switch-string-length-tower-var                    15.9058+-0.9173           15.6562+-0.3901          might be 1.0159x faster
   switch-string-length-tower                        13.3571+-0.4115           13.3369+-0.4185        
   switch-string-short                               13.0681+-0.2632     ?     13.0780+-0.2410        ?
   switch                                            12.6971+-0.3522     ?     12.8331+-0.3766        ? might be 1.0107x slower
   tear-off-arguments-simple                          3.7163+-0.2779            3.5373+-0.1716          might be 1.0506x faster
   tear-off-arguments                                 4.8767+-0.0937            4.8663+-0.0628        
   temporal-structure                                12.3037+-0.0991           12.1988+-0.2099        
   to-int32-boolean                                  14.0151+-0.2238     ?     14.1297+-0.1866        ?
   try-catch-get-by-val-cloned-arguments             15.9945+-1.4572           15.0421+-0.8063          might be 1.0633x faster
   try-catch-get-by-val-direct-arguments              6.8995+-0.9062            6.6646+-0.3664          might be 1.0353x faster
   try-catch-get-by-val-scoped-arguments              8.1883+-0.2582     ?      9.2985+-1.5091        ? might be 1.1356x slower
   typed-array-get-set-by-val-profiling              33.1230+-0.7783     ^     28.0772+-0.4511        ^ definitely 1.1797x faster
   undefined-property-access                        349.7361+-12.9536         342.1995+-2.0816          might be 1.0220x faster
   undefined-test                                     3.0733+-0.0326     ?      3.1207+-0.0918        ? might be 1.0154x slower
   unprofiled-licm                                   22.9499+-0.4767     ?     23.1497+-0.5466        ?
   varargs-call                                      15.0807+-0.2281     ?     15.3544+-0.8418        ? might be 1.0182x slower
   varargs-construct-inline                          29.3266+-1.3538           28.2580+-0.9663          might be 1.0378x faster
   varargs-construct                                 23.5056+-1.5459           22.6628+-0.5438          might be 1.0372x faster
   varargs-inline                                     9.4643+-0.2805            9.3975+-0.0842        
   varargs-strict-mode                                9.9999+-0.0709     ?     10.2587+-0.3611        ? might be 1.0259x slower
   varargs                                           10.5316+-1.1253     ?     11.3717+-3.5850        ? might be 1.0798x slower
   weird-inlining-const-prop                          3.2692+-0.2131     ?      3.3594+-0.2584        ? might be 1.0276x slower

   <geometric>                                        9.2010+-0.0166     ^      9.1231+-0.0308        ^ definitely 1.0085x faster

                                                        TipOfTree                    ABC                                        
AsmBench:
   bigfib.cpp                                       501.2403+-2.0450          501.0593+-1.5281        
   cray.c                                           427.7279+-1.4031     !    430.2067+-1.0034        ! definitely 1.0058x slower
   dry.c                                            488.7017+-11.9086    ?    493.8884+-1.8162        ? might be 1.0106x slower
   FloatMM.c                                        735.0844+-33.3353         722.1065+-1.5561          might be 1.0180x faster
   gcc-loops.cpp                                   4097.9397+-15.9951    ?   4111.0414+-14.6130       ?
   n-body.c                                         972.7664+-1.4076     ?    976.3195+-2.2343        ?
   Quicksort.c                                      425.8973+-11.4986    ?    435.4954+-30.1243       ? might be 1.0225x slower
   stepanov_container.cpp                          3597.7916+-16.2538    ?   3875.1390+-453.6387      ? might be 1.0771x slower
   Towers.c                                         245.5719+-1.6510          244.3245+-3.9464        

   <geometric>                                      786.6779+-4.1868     ?    794.7784+-15.2882       ? might be 1.0103x slower

                                                        TipOfTree                    ABC                                        
CompressionBench:
   huffman                                          379.7402+-15.6657    ^    357.2908+-3.5455        ^ definitely 1.0628x faster
   arithmetic-simple                                375.8312+-3.8905     ^    347.6770+-1.8509        ^ definitely 1.0810x faster
   arithmetic-precise                               299.9359+-5.9868          294.5298+-2.8183          might be 1.0184x faster
   arithmetic-complex-precise                       300.9635+-13.8135         294.1683+-12.4777         might be 1.0231x faster
   arithmetic-precise-order-0                       388.4006+-3.6318     ^    363.5165+-4.1081        ^ definitely 1.0685x faster
   arithmetic-precise-order-1                       324.8556+-2.3355     ?    325.7362+-7.4961        ?
   arithmetic-precise-order-2                       361.5630+-3.8288          361.0098+-2.8446        
   arithmetic-simple-order-1                        421.7841+-1.1354     ^    401.1082+-18.8376       ^ definitely 1.0515x faster
   arithmetic-simple-order-2                        491.2053+-26.6762    ^    454.6497+-4.0502        ^ definitely 1.0804x faster
   lz-string                                        325.8858+-8.6184          320.0770+-3.4284          might be 1.0181x faster

   <geometric>                                      362.8556+-2.2259     ^    348.9970+-0.9225        ^ definitely 1.0397x faster

                                                        TipOfTree                    ABC                                        
Geomean of preferred means:
   <scaled-result>                                   62.8416+-0.5070           62.3828+-0.2250          might be 1.0074x faster

[Filip Pizlo]

Created attachment 254684 [details]
the patch

[WebKit Commit Bot]

Attachment 254684 [details] did not pass style-queue:


ERROR: Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:313:  Place brace on its own line for function definitions.  [whitespace/braces] [4]
ERROR: Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:866:  Boolean expressions that span multiple lines should have their operators on the left side of the line instead of the right side.  [whitespace/operators] [4]
ERROR: Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:866:  Multi line control clauses should use braces.  [whitespace/braces] [4]
ERROR: Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:1141:  Place brace on its own line for function definitions.  [whitespace/braces] [4]
ERROR: Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:1190:  Place brace on its own line for function definitions.  [whitespace/braces] [4]
Total errors found: 5 in 20 files


If any of these errors are false positives, please file a bug against check-webkit-style.

[Benjamin Poulain]

Comment on attachment 254684 [details]
the patch

View in context: https://bugs.webkit.org/attachment.cgi?id=254684&action=review

> Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:155
> +        if (m_offset == std::numeric_limits<int>::min())
> +            return Relationship();

It would be good to have a test covering this case.

> Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:309
> +        // Make sure that if we have a LessThan, then it's first.
> +        if (b.m_kind == LessThan)
> +            std::swap(a, b);
> +        
> +        // Make sure that if we have a NotEqual, then it's first.
> +        if (b.m_kind == NotEqual)
> +            std::swap(a, b);

I would move those to mergeImpl() and remove the comments.

> Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:332
> +    Relationship filter(const Relationship& other) const

TODO: review this.

> Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:341
> +        // this to assume that we different offsets anytime that everything but the offset is

"assume that we different offsets anytime"

> Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:436
> +        int minRightValue;
> +        if (m_right->isInt32Constant())
> +            minRightValue = m_right->asInt32();
> +        else
> +            minRightValue = std::numeric_limits<int>::min();

Maybe simpler like this?

int minRightValue = std::numeric_limits<int>::min();
if (m_right->isInt32Constant())
    minRightValue = m_right->asInt32();

> Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:440
> +        return clampedSum(minRightValue, m_offset);

I am not following this case.

If we are here, we have (kind == Equal or kind == NotEqual).
Why is the mind value of NotEqual @b + Constant?

> Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:455
> +        int maxRightValue;
> +        if (m_right->isInt32Constant())
> +            maxRightValue = m_right->asInt32();
> +        else
> +            maxRightValue = std::numeric_limits<int>::max();

"Simpler" version here too.

> Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:459
> +        return clampedSum(maxRightValue, m_offset);

Same question about NotEqual

> Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:495
> +        ASSERT(sameNodesAs(other));

An other precondition is that neither node has the relation "GreaterThan".

> Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:520
> +        // this to assume that we different offsets anytime that everything but the offset is

"that we different offsets"

> Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:531
> +                    // Saying that you might be B when you've already said that you're anything
> +                    // but A, where A and B are different, is a tautology. You could just say
> +                    // that you're anything but A.

Maybe just write an example as this is a pretty obvious case?
   // Adding "(a == b + 1)" to "(a != b + 5)" has no value.

> Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:548
> +            // If we have C > D, then we could keep both claims, but we are cheap, so we
> +            // don't. We just use the NotEqual.

Wouldn't it be easier to implement it instead of justifying not having it? :)

> Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:611
> +            std::max(m_offset, other.m_offset) + 1);

Not a fan of the implicit overflow here but it's harmless.

It would be good to have tests for those cases though.

> Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:645
> +        // Before we do anything, make sure that we have a zero constant at the top.

I would also say why in addition to what.

> Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:939
> +            if (!node->child2()->isInt32Constant())

No love for (constant + @value)?

> Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:987
> +                if (!sumOverflows<int>(std::numeric_limits<int>::max(), -offset, 1)) {

I don't follow this.

Say way have:
    @1 = @x + 1000;
    @2 = @1 + 10;

You add the relationship @1 < 0 + max - 10 + 1.

Say that we

> Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:1274
> +

1274 lines! The original CSS JIT was small than that :)

[Filip Pizlo]

(In reply to comment #13)
> Comment on attachment 254684 [details]
> the patch
> 
> View in context:
> https://bugs.webkit.org/attachment.cgi?id=254684&action=review
> 
> > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:155
> > +        if (m_offset == std::numeric_limits<int>::min())
> > +            return Relationship();
> 
> It would be good to have a test covering this case.

Good idea!

> 
> > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:309
> > +        // Make sure that if we have a LessThan, then it's first.
> > +        if (b.m_kind == LessThan)
> > +            std::swap(a, b);
> > +        
> > +        // Make sure that if we have a NotEqual, then it's first.
> > +        if (b.m_kind == NotEqual)
> > +            std::swap(a, b);
> 
> I would move those to mergeImpl() and remove the comments.

I don't think so - we cannot swap *this and other in mergeImpl(). :-)

> 
> > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:332
> > +    Relationship filter(const Relationship& other) const
> 
> TODO: review this.
> 
> > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:341
> > +        // this to assume that we different offsets anytime that everything but the offset is
> 
> "assume that we different offsets anytime"
> 
> > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:436
> > +        int minRightValue;
> > +        if (m_right->isInt32Constant())
> > +            minRightValue = m_right->asInt32();
> > +        else
> > +            minRightValue = std::numeric_limits<int>::min();
> 
> Maybe simpler like this?
> 
> int minRightValue = std::numeric_limits<int>::min();
> if (m_right->isInt32Constant())
>     minRightValue = m_right->asInt32();

That works, too.

> 
> > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:440
> > +        return clampedSum(minRightValue, m_offset);
> 
> I am not following this case.
> 
> If we are here, we have (kind == Equal or kind == NotEqual).
> Why is the mind value of NotEqual @b + Constant?

Ooops.  That's a bug.

I added NotEqual after writing this code.  The case for LessThan, above, which returns std::numeric_limits<int>::min() should also do the same for NotEqual.

> 
> > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:455
> > +        int maxRightValue;
> > +        if (m_right->isInt32Constant())
> > +            maxRightValue = m_right->asInt32();
> > +        else
> > +            maxRightValue = std::numeric_limits<int>::max();
> 
> "Simpler" version here too.
> 
> > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:459
> > +        return clampedSum(maxRightValue, m_offset);
> 
> Same question about NotEqual

Ditto, bug.

> 
> > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:495
> > +        ASSERT(sameNodesAs(other));
> 
> An other precondition is that neither node has the relation "GreaterThan".

True!  I should add that assert.

> 
> > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:520
> > +        // this to assume that we different offsets anytime that everything but the offset is
> 
> "that we different offsets"
> 
> > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:531
> > +                    // Saying that you might be B when you've already said that you're anything
> > +                    // but A, where A and B are different, is a tautology. You could just say
> > +                    // that you're anything but A.
> 
> Maybe just write an example as this is a pretty obvious case?
>    // Adding "(a == b + 1)" to "(a != b + 5)" has no value.

OK.

> 
> > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:548
> > +            // If we have C > D, then we could keep both claims, but we are cheap, so we
> > +            // don't. We just use the NotEqual.
> 
> Wouldn't it be easier to implement it instead of justifying not having it? :)

By "cheap" I mean that we are trying to accelerate convergence.  Any time that we create more relationships, we create more things to merge, and possibly increase the number of fixpoint iterations.

Not implementing something we don't think is valuable is kind of a convergence hack - fewer relationships means less time spent processing relationships.

> 
> > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:611
> > +            std::max(m_offset, other.m_offset) + 1);
> 
> Not a fan of the implicit overflow here but it's harmless.
> 
> It would be good to have tests for those cases though.

Interesting. I didn't want this overflow. I'll guard this with sumOverflows() or something.

> 
> > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:645
> > +        // Before we do anything, make sure that we have a zero constant at the top.
> 
> I would also say why in addition to what.
> 
> > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:939
> > +            if (!node->child2()->isInt32Constant())
> 
> No love for (constant + @value)?

See DFGStrenghtReductionPhase.cpp.  It canonicalizes constant+@value to @value+constant.

This is also why we don't handle @value-constant.  It would have been canonicalized to @value+(-constant).

> 
> > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:987
> > +                if (!sumOverflows<int>(std::numeric_limits<int>::max(), -offset, 1)) {
> 
> I don't follow this.
> 
> Say way have:
>     @1 = @x + 1000;
>     @2 = @1 + 10;
> 
> You add the relationship @1 < 0 + max - 10 + 1.
> 
> Say that we

I'm curious what you were thinking. :-)

> 
> > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:1274
> > +
> 
> 1274 lines! The original CSS JIT was small than that :)

[Benjamin Poulain]

I don't know why bugzilla cut that comment. The full question was:

Say way have:
    @1 = @x + 10;
    @2 = @1 + 1000;

You add the relationship
    @1 < int_max - 1000 + 1.
And
    @x < int_max - 1000 + 1 + 10;

Now the maxValue of @x is less than (int_max - 1000 + 1 + 10) and we could use that to change the ArithMode to Unchecked.

What am I missing?

[Filip Pizlo]

(In reply to comment #15)
> I don't know why bugzilla cut that comment. The full question was:
> 
> Say way have:
>     @1 = @x + 10;
>     @2 = @1 + 1000;
> 
> You add the relationship
>     @1 < int_max - 1000 + 1.
> And
>     @x < int_max - 1000 + 1 + 10;
> 
> Now the maxValue of @x is less than (int_max - 1000 + 1 + 10) and we could
> use that to change the ArithMode to Unchecked.
> 
> What am I missing?

Note that relationships are flow sensitive.  When we set a relationship, that relationship holds only *after* that node executes, and cannot be used to strength-reduce the node itself.

Now let me see if I follow.  When we see:

    @1 = @x + 10

Then we conclude that @x < int_max - 10 + 1.  We also conclude that @1 > int_min + 10 - 1.

This doesn't help us remove any checks from this though:

    @2 = @1 + 1000

Since @1 has no meaningful upper bound, yet.  But after this executes, we will know that @1 < int_max - 1000 + 1 and @2 > int_min + 1000 - 1.  Because of the other relationships, we will also have:

    @x + 10 < int_max - 1000 + 1
    @x < int_max - 1000 + 1 - 10
    @x < int_max - 1010 + 1

Which means that if you later do:

    ArithAdd(@x, 1010)

Then we can remove the overflow check from that node.  But it does not mean that we can retroactively remove the checks from the previous nodes, since all of these relationships come into effect after the execution of those nodes.

[Benjamin Poulain]

Comment on attachment 254684 [details]
the patch

View in context: https://bugs.webkit.org/attachment.cgi?id=254684&action=review

Some more comments.

> Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:331
> +    // In some cases, it will do something conservative. It's always safe for this to return
> +    // *this, or to return other. It'll do that sometimes, mainly to accelerate convergence for
> +    // things that we don't think are important enough to slow down the analysis.

This is pretty clear, I think the null case makes things more complicated.

It would be good to justify every use of the null return. Otherwise anyone will be afraid to touch this code in the future because they won't know why some cases return null instead of *this.

> Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:352
> +        // Useful helper for flipping.

This comment does not help enough IMHO. It would be more helpful to say that you only implement check for LessThan and flip the relation when handling GreaterThan.

> Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:384
> +            //     @a != @b + C
> +            //     @a  < @b + D

Reading this patch for a while now, I really like those little examples. They help a lot.

> Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:417
> +            return Relationship();

I don't know if you have a rationale for this. I am thinking that keeping the LessThan would be valuable. In general I see code dealing mostly with positive numbers. Knowing an upper bound seems more useful on average.

> Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:743
> +                    Relationship relationship;

relationship -> relationshipForTrueCase or something like that?

> Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:755
> +                    } else {

This could be if (terminal->child1().useKind() == BooleanUse)

[Benjamin Poulain]

> Note that relationships are flow sensitive.  When we set a relationship,
> that relationship holds only *after* that node executes, and cannot be used
> to strength-reduce the node itself.
> 
> Now let me see if I follow.  When we see:
> 
>     @1 = @x + 10
> 
> Then we conclude that @x < int_max - 10 + 1.  We also conclude that @1 >
> int_min + 10 - 1.
> 
> This doesn't help us remove any checks from this though:
> 
>     @2 = @1 + 1000
> 
> Since @1 has no meaningful upper bound, yet.  But after this executes, we
> will know that @1 < int_max - 1000 + 1 and @2 > int_min + 1000 - 1.  Because
> of the other relationships, we will also have:
> 
>     @x + 10 < int_max - 1000 + 1
>     @x < int_max - 1000 + 1 - 10
>     @x < int_max - 1010 + 1
> 
> Which means that if you later do:
> 
>     ArithAdd(@x, 1010)
> 
> Then we can remove the overflow check from that node.  But it does not mean
> that we can retroactively remove the checks from the previous nodes, since
> all of these relationships come into effect after the execution of those
> nodes.

Ok!

Somehow I thought the relationship on @x could end up in the relationship at head. Looking back how merging works, that makes a little more sense :)

[Filip Pizlo]

(In reply to comment #17)
> Comment on attachment 254684 [details]
> the patch
> 
> View in context:
> https://bugs.webkit.org/attachment.cgi?id=254684&action=review
> 
> Some more comments.
> 
> > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:331
> > +    // In some cases, it will do something conservative. It's always safe for this to return
> > +    // *this, or to return other. It'll do that sometimes, mainly to accelerate convergence for
> > +    // things that we don't think are important enough to slow down the analysis.
> 
> This is pretty clear, I think the null case makes things more complicated.
> 
> It would be good to justify every use of the null return. Otherwise anyone
> will be afraid to touch this code in the future because they won't know why
> some cases return null instead of *this.

Null return means: please represent the intersection of the two relationships by explicitly keeping both relationships.

> 
> > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:352
> > +        // Useful helper for flipping.
> 
> This comment does not help enough IMHO. It would be more helpful to say that
> you only implement check for LessThan and flip the relation when handling
> GreaterThan.
> 
> > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:384
> > +            //     @a != @b + C
> > +            //     @a  < @b + D
> 
> Reading this patch for a while now, I really like those little examples.
> They help a lot.
> 
> > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:417
> > +            return Relationship();
> 
> I don't know if you have a rationale for this. I am thinking that keeping
> the LessThan would be valuable. In general I see code dealing mostly with
> positive numbers. Knowing an upper bound seems more useful on average.

That's what this is doing.  Returning null means that we keep both relationships.  This is how we get things like 0 <= @x < array.length.  If we returned *this or if we returned *other, we'd only get 0 <= @x or @x < array.length but not both.

> 
> > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:743
> > +                    Relationship relationship;
> 
> relationship -> relationshipForTrueCase or something like that?

Good idea!

> 
> > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:755
> > +                    } else {
> 
> This could be if (terminal->child1().useKind() == BooleanUse)

It could be, but it doesn't have to be.  We could have a FixupPhase decide that a Branch has an UntypedUse edge, but by later transformations (like some CFG simplification or whatever), the Branch's child ends up just being a CompareEq or the like.

Point is, if we know that the child of the Branch is one of the Compare's, then we don't need to look at the use kind.  If the use kind is either BooleanUse or UntypedUse, then the code does exactly what it should do. If the use kind was anything else, then this will always OSR exit, in which case we can propagate whatever we like to the successors (and so in that case, this code is correct as well).

[Filip Pizlo]

(In reply to comment #14)
> (In reply to comment #13)
> > Comment on attachment 254684 [details]
> > the patch
> > 
> > View in context:
> > https://bugs.webkit.org/attachment.cgi?id=254684&action=review
> > 
> > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:155
> > > +        if (m_offset == std::numeric_limits<int>::min())
> > > +            return Relationship();
> > 
> > It would be good to have a test covering this case.
> 
> Good idea!

I can't easily come up with what this test would look like.  I might try to come back to this later.

> 
> > 
> > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:309
> > > +        // Make sure that if we have a LessThan, then it's first.
> > > +        if (b.m_kind == LessThan)
> > > +            std::swap(a, b);
> > > +        
> > > +        // Make sure that if we have a NotEqual, then it's first.
> > > +        if (b.m_kind == NotEqual)
> > > +            std::swap(a, b);
> > 
> > I would move those to mergeImpl() and remove the comments.
> 
> I don't think so - we cannot swap *this and other in mergeImpl(). :-)
> 
> > 
> > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:332
> > > +    Relationship filter(const Relationship& other) const
> > 
> > TODO: review this.
> > 
> > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:341
> > > +        // this to assume that we different offsets anytime that everything but the offset is
> > 
> > "assume that we different offsets anytime"
> > 
> > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:436
> > > +        int minRightValue;
> > > +        if (m_right->isInt32Constant())
> > > +            minRightValue = m_right->asInt32();
> > > +        else
> > > +            minRightValue = std::numeric_limits<int>::min();
> > 
> > Maybe simpler like this?
> > 
> > int minRightValue = std::numeric_limits<int>::min();
> > if (m_right->isInt32Constant())
> >     minRightValue = m_right->asInt32();
> 
> That works, too.

Fixed.

> 
> > 
> > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:440
> > > +        return clampedSum(minRightValue, m_offset);
> > 
> > I am not following this case.
> > 
> > If we are here, we have (kind == Equal or kind == NotEqual).
> > Why is the mind value of NotEqual @b + Constant?
> 
> Ooops.  That's a bug.
> 
> I added NotEqual after writing this code.  The case for LessThan, above,
> which returns std::numeric_limits<int>::min() should also do the same for
> NotEqual.

Fixed.  And I added a test.

> 
> > 
> > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:455
> > > +        int maxRightValue;
> > > +        if (m_right->isInt32Constant())
> > > +            maxRightValue = m_right->asInt32();
> > > +        else
> > > +            maxRightValue = std::numeric_limits<int>::max();
> > 
> > "Simpler" version here too.
> > 
> > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:459
> > > +        return clampedSum(maxRightValue, m_offset);
> > 
> > Same question about NotEqual
> 
> Ditto, bug.

Ditto, fixed.

> 
> > 
> > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:495
> > > +        ASSERT(sameNodesAs(other));
> > 
> > An other precondition is that neither node has the relation "GreaterThan".
> 
> True!  I should add that assert.
> 
> > 
> > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:520
> > > +        // this to assume that we different offsets anytime that everything but the offset is
> > 
> > "that we different offsets"
> > 
> > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:531
> > > +                    // Saying that you might be B when you've already said that you're anything
> > > +                    // but A, where A and B are different, is a tautology. You could just say
> > > +                    // that you're anything but A.
> > 
> > Maybe just write an example as this is a pretty obvious case?
> >    // Adding "(a == b + 1)" to "(a != b + 5)" has no value.
> 
> OK.
> 
> > 
> > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:548
> > > +            // If we have C > D, then we could keep both claims, but we are cheap, so we
> > > +            // don't. We just use the NotEqual.
> > 
> > Wouldn't it be easier to implement it instead of justifying not having it? :)
> 
> By "cheap" I mean that we are trying to accelerate convergence.  Any time
> that we create more relationships, we create more things to merge, and
> possibly increase the number of fixpoint iterations.
> 
> Not implementing something we don't think is valuable is kind of a
> convergence hack - fewer relationships means less time spent processing
> relationships.
> 
> > 
> > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:611
> > > +            std::max(m_offset, other.m_offset) + 1);
> > 
> > Not a fan of the implicit overflow here but it's harmless.
> > 
> > It would be good to have tests for those cases though.
> 
> Interesting. I didn't want this overflow. I'll guard this with
> sumOverflows() or something.
> 
> > 
> > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:645
> > > +        // Before we do anything, make sure that we have a zero constant at the top.
> > 
> > I would also say why in addition to what.
> > 
> > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:939
> > > +            if (!node->child2()->isInt32Constant())
> > 
> > No love for (constant + @value)?
> 
> See DFGStrenghtReductionPhase.cpp.  It canonicalizes constant+@value to
> @value+constant.
> 
> This is also why we don't handle @value-constant.  It would have been
> canonicalized to @value+(-constant).
> 
> > 
> > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:987
> > > +                if (!sumOverflows<int>(std::numeric_limits<int>::max(), -offset, 1)) {
> > 
> > I don't follow this.
> > 
> > Say way have:
> >     @1 = @x + 1000;
> >     @2 = @1 + 10;
> > 
> > You add the relationship @1 < 0 + max - 10 + 1.
> > 
> > Say that we
> 
> I'm curious what you were thinking. :-)
> 
> > 
> > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:1274
> > > +
> > 
> > 1274 lines! The original CSS JIT was small than that :)

Still need to address these other comments.

[Filip Pizlo]

Created attachment 254964 [details]
the patch

Patch which addresses some of the feedback.

[WebKit Commit Bot]

Attachment 254964 [details] did not pass style-queue:


ERROR: Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:313:  Place brace on its own line for function definitions.  [whitespace/braces] [4]
ERROR: Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:864:  Boolean expressions that span multiple lines should have their operators on the left side of the line instead of the right side.  [whitespace/operators] [4]
ERROR: Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:864:  Multi line control clauses should use braces.  [whitespace/braces] [4]
ERROR: Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:1139:  Place brace on its own line for function definitions.  [whitespace/braces] [4]
ERROR: Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:1188:  Place brace on its own line for function definitions.  [whitespace/braces] [4]
Total errors found: 5 in 22 files


If any of these errors are false positives, please file a bug against check-webkit-style.

[Filip Pizlo]

(In reply to comment #20)
> (In reply to comment #14)
> > (In reply to comment #13)
> > > Comment on attachment 254684 [details]
> > > the patch
> > > 
> > > View in context:
> > > https://bugs.webkit.org/attachment.cgi?id=254684&action=review
> > > 
> > > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:155
> > > > +        if (m_offset == std::numeric_limits<int>::min())
> > > > +            return Relationship();
> > > 
> > > It would be good to have a test covering this case.
> > 
> > Good idea!
> 
> I can't easily come up with what this test would look like.  I might try to
> come back to this later.
> 
> > 
> > > 
> > > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:309
> > > > +        // Make sure that if we have a LessThan, then it's first.
> > > > +        if (b.m_kind == LessThan)
> > > > +            std::swap(a, b);
> > > > +        
> > > > +        // Make sure that if we have a NotEqual, then it's first.
> > > > +        if (b.m_kind == NotEqual)
> > > > +            std::swap(a, b);
> > > 
> > > I would move those to mergeImpl() and remove the comments.
> > 
> > I don't think so - we cannot swap *this and other in mergeImpl(). :-)
> > 
> > > 
> > > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:332
> > > > +    Relationship filter(const Relationship& other) const
> > > 
> > > TODO: review this.
> > > 
> > > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:341
> > > > +        // this to assume that we different offsets anytime that everything but the offset is
> > > 
> > > "assume that we different offsets anytime"
> > > 
> > > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:436
> > > > +        int minRightValue;
> > > > +        if (m_right->isInt32Constant())
> > > > +            minRightValue = m_right->asInt32();
> > > > +        else
> > > > +            minRightValue = std::numeric_limits<int>::min();
> > > 
> > > Maybe simpler like this?
> > > 
> > > int minRightValue = std::numeric_limits<int>::min();
> > > if (m_right->isInt32Constant())
> > >     minRightValue = m_right->asInt32();
> > 
> > That works, too.
> 
> Fixed.
> 
> > 
> > > 
> > > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:440
> > > > +        return clampedSum(minRightValue, m_offset);
> > > 
> > > I am not following this case.
> > > 
> > > If we are here, we have (kind == Equal or kind == NotEqual).
> > > Why is the mind value of NotEqual @b + Constant?
> > 
> > Ooops.  That's a bug.
> > 
> > I added NotEqual after writing this code.  The case for LessThan, above,
> > which returns std::numeric_limits<int>::min() should also do the same for
> > NotEqual.
> 
> Fixed.  And I added a test.
> 
> > 
> > > 
> > > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:455
> > > > +        int maxRightValue;
> > > > +        if (m_right->isInt32Constant())
> > > > +            maxRightValue = m_right->asInt32();
> > > > +        else
> > > > +            maxRightValue = std::numeric_limits<int>::max();
> > > 
> > > "Simpler" version here too.
> > > 
> > > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:459
> > > > +        return clampedSum(maxRightValue, m_offset);
> > > 
> > > Same question about NotEqual
> > 
> > Ditto, bug.
> 
> Ditto, fixed.
> 
> > 
> > > 
> > > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:495
> > > > +        ASSERT(sameNodesAs(other));
> > > 
> > > An other precondition is that neither node has the relation "GreaterThan".
> > 
> > True!  I should add that assert.
> > 
> > > 
> > > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:520
> > > > +        // this to assume that we different offsets anytime that everything but the offset is
> > > 
> > > "that we different offsets"
> > > 
> > > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:531
> > > > +                    // Saying that you might be B when you've already said that you're anything
> > > > +                    // but A, where A and B are different, is a tautology. You could just say
> > > > +                    // that you're anything but A.
> > > 
> > > Maybe just write an example as this is a pretty obvious case?
> > >    // Adding "(a == b + 1)" to "(a != b + 5)" has no value.
> > 
> > OK.
> > 
> > > 
> > > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:548
> > > > +            // If we have C > D, then we could keep both claims, but we are cheap, so we
> > > > +            // don't. We just use the NotEqual.
> > > 
> > > Wouldn't it be easier to implement it instead of justifying not having it? :)
> > 
> > By "cheap" I mean that we are trying to accelerate convergence.  Any time
> > that we create more relationships, we create more things to merge, and
> > possibly increase the number of fixpoint iterations.
> > 
> > Not implementing something we don't think is valuable is kind of a
> > convergence hack - fewer relationships means less time spent processing
> > relationships.
> > 
> > > 
> > > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:611
> > > > +            std::max(m_offset, other.m_offset) + 1);
> > > 
> > > Not a fan of the implicit overflow here but it's harmless.
> > > 
> > > It would be good to have tests for those cases though.
> > 
> > Interesting. I didn't want this overflow. I'll guard this with
> > sumOverflows() or something.

Fixed.

> > 
> > > 
> > > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:645
> > > > +        // Before we do anything, make sure that we have a zero constant at the top.
> > > 
> > > I would also say why in addition to what.
> > > 
> > > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:939
> > > > +            if (!node->child2()->isInt32Constant())
> > > 
> > > No love for (constant + @value)?
> > 
> > See DFGStrenghtReductionPhase.cpp.  It canonicalizes constant+@value to
> > @value+constant.
> > 
> > This is also why we don't handle @value-constant.  It would have been
> > canonicalized to @value+(-constant).
> > 
> > > 
> > > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:987
> > > > +                if (!sumOverflows<int>(std::numeric_limits<int>::max(), -offset, 1)) {
> > > 
> > > I don't follow this.
> > > 
> > > Say way have:
> > >     @1 = @x + 1000;
> > >     @2 = @1 + 10;
> > > 
> > > You add the relationship @1 < 0 + max - 10 + 1.
> > > 
> > > Say that we
> > 
> > I'm curious what you were thinking. :-)
> > 
> > > 
> > > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:1274
> > > > +
> > > 
> > > 1274 lines! The original CSS JIT was small than that :)
> 
> Still need to address these other comments.

[Filip Pizlo]

(In reply to comment #19)
> (In reply to comment #17)
> > Comment on attachment 254684 [details]
> > the patch
> > 
> > View in context:
> > https://bugs.webkit.org/attachment.cgi?id=254684&action=review
> > 
> > Some more comments.
> > 
> > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:331
> > > +    // In some cases, it will do something conservative. It's always safe for this to return
> > > +    // *this, or to return other. It'll do that sometimes, mainly to accelerate convergence for
> > > +    // things that we don't think are important enough to slow down the analysis.
> > 
> > This is pretty clear, I think the null case makes things more complicated.
> > 
> > It would be good to justify every use of the null return. Otherwise anyone
> > will be afraid to touch this code in the future because they won't know why
> > some cases return null instead of *this.
> 
> Null return means: please represent the intersection of the two
> relationships by explicitly keeping both relationships.
> 
> > 
> > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:352
> > > +        // Useful helper for flipping.
> > 
> > This comment does not help enough IMHO. It would be more helpful to say that
> > you only implement check for LessThan and flip the relation when handling
> > GreaterThan.
> > 
> > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:384
> > > +            //     @a != @b + C
> > > +            //     @a  < @b + D
> > 
> > Reading this patch for a while now, I really like those little examples.
> > They help a lot.
> > 
> > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:417
> > > +            return Relationship();
> > 
> > I don't know if you have a rationale for this. I am thinking that keeping
> > the LessThan would be valuable. In general I see code dealing mostly with
> > positive numbers. Knowing an upper bound seems more useful on average.
> 
> That's what this is doing.  Returning null means that we keep both
> relationships.  This is how we get things like 0 <= @x < array.length.  If
> we returned *this or if we returned *other, we'd only get 0 <= @x or @x <
> array.length but not both.
> 
> > 
> > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:743
> > > +                    Relationship relationship;
> > 
> > relationship -> relationshipForTrueCase or something like that?
> 
> Good idea!

Fixed.  I used "relationshipForTrue" since it's shorter and just as meaningful.

> 
> > 
> > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:755
> > > +                    } else {
> > 
> > This could be if (terminal->child1().useKind() == BooleanUse)
> 
> It could be, but it doesn't have to be.  We could have a FixupPhase decide
> that a Branch has an UntypedUse edge, but by later transformations (like
> some CFG simplification or whatever), the Branch's child ends up just being
> a CompareEq or the like.
> 
> Point is, if we know that the child of the Branch is one of the Compare's,
> then we don't need to look at the use kind.  If the use kind is either
> BooleanUse or UntypedUse, then the code does exactly what it should do. If
> the use kind was anything else, then this will always OSR exit, in which
> case we can propagate whatever we like to the successors (and so in that
> case, this code is correct as well).

[Benjamin Poulain]

Comment on attachment 254964 [details]
the patch

View in context: https://bugs.webkit.org/attachment.cgi?id=254964&action=review

> Source/JavaScriptCore/ChangeLog:35
> +        * tests/stress/add-overflows-after-not-equal.js: Added.
> +        * tests/stress/sub-overflows-after-not-equal.js: Added.

IMHO, it would be worth adding stress tests to check anything you can come up with.

It's not exactly a simple patch and we'll have very little time to discover any unforeseen side effect.

> Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:714
> +        bool changed = true;
> +        while (changed) {

I think it would be good to explain the convergency trick on < and > with 1, 0, -1 that you explained in your office. Otherwise it seems a bit mysterious that this does not run forever.

> Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:1137
> +        if (m_seenBlocks.add(target)) {

What is inside the if() is pretty self contained. If it is possible to move it to a function, that may make the code more readable.

Maybe:
    filterLiveRelationships(relationshipMap, target, [] (Node* node, const Vector<Relationship>& liveRelationships)
?

> Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:1170
> +        // are using RPO.

RPO -> reverse post-order traversal. I am not good at remembering acronyms :)

> Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:1181
> +            Vector<Relationship> values;

values->mergedRelationships or something like that?

[Filip Pizlo]

(In reply to comment #25)
> Comment on attachment 254964 [details]
> the patch
> 
> View in context:
> https://bugs.webkit.org/attachment.cgi?id=254964&action=review
> 
> > Source/JavaScriptCore/ChangeLog:35
> > +        * tests/stress/add-overflows-after-not-equal.js: Added.
> > +        * tests/stress/sub-overflows-after-not-equal.js: Added.
> 
> IMHO, it would be worth adding stress tests to check anything you can come
> up with.
> 
> It's not exactly a simple patch and we'll have very little time to discover
> any unforeseen side effect.

Agreed.  I'll try to come up with more tests.

> 
> > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:714
> > +        bool changed = true;
> > +        while (changed) {
> 
> I think it would be good to explain the convergency trick on < and > with 1,
> 0, -1 that you explained in your office. Otherwise it seems a bit mysterious
> that this does not run forever.

OK.  I will try to say something about this.

> 
> > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:1137
> > +        if (m_seenBlocks.add(target)) {
> 
> What is inside the if() is pretty self contained. If it is possible to move
> it to a function, that may make the code more readable.
> 
> Maybe:
>     filterLiveRelationships(relationshipMap, target, [] (Node* node, const
> Vector<Relationship>& liveRelationships)
> ?

I'll try that.

> 
> > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:1170
> > +        // are using RPO.
> 
> RPO -> reverse post-order traversal. I am not good at remembering acronyms :)

OK!

> 
> > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:1181
> > +            Vector<Relationship> values;
> 
> values->mergedRelationships or something like that?

OK.

[Filip Pizlo]

Latest perf data.


Benchmark report for SunSpider, LongSpider, V8Spider, Octane, Kraken, JSRegress, AsmBench, and CompressionBench on dethklok (MacBookPro9,1).

VMs tested:
"TipOfTree" at /Volumes/Data/pizlo/secondary/OpenSource/WebKitBuild/Release/jsc (r185618)
"ABC" at /Volumes/Data/pizlo/tertiary/OpenSource/WebKitBuild/Release/jsc (r185618)

Collected 6 samples per benchmark/VM, with 6 VM invocations per benchmark. Emitted a call to gc() between sample measurements.
Used 1 benchmark iteration per VM invocation for warm-up. Used the jsc-specific preciseTime() function to get microsecond-level
timing. Reporting benchmark execution times with 95% confidence intervals in milliseconds.

                                                        TipOfTree                    ABC                                        
SunSpider:
   3d-cube                                            5.1960+-0.1585     ?      5.2406+-0.2075        ?
   3d-morph                                           5.9571+-0.2759            5.9016+-0.1508        
   3d-raytrace                                        6.6202+-0.2594     ?      6.7535+-0.2991        ? might be 1.0201x slower
   access-binary-trees                                2.4146+-0.1719     ?      2.5492+-0.2759        ? might be 1.0558x slower
   access-fannkuch                                    6.5947+-0.9682            6.3028+-0.3708          might be 1.0463x faster
   access-nbody                                       3.2017+-0.2743            2.9415+-0.0694          might be 1.0884x faster
   access-nsieve                                      3.1820+-0.1015     ?      3.3265+-0.1480        ? might be 1.0454x slower
   bitops-3bit-bits-in-byte                           1.7332+-0.1737            1.6407+-0.0325          might be 1.0563x faster
   bitops-bits-in-byte                                4.0867+-0.3842            3.9713+-0.3355          might be 1.0291x faster
   bitops-bitwise-and                                 2.2540+-0.0988     ?      2.2602+-0.1528        ?
   bitops-nsieve-bits                                 3.3277+-0.1836            3.2922+-0.0401          might be 1.0108x faster
   controlflow-recursive                              3.0985+-0.1947            3.0236+-0.2647          might be 1.0248x faster
   crypto-aes                                         4.7303+-0.1611     ?      4.8579+-0.5297        ? might be 1.0270x slower
   crypto-md5                                         2.7583+-0.0762            2.7141+-0.0592          might be 1.0163x faster
   crypto-sha1                                        3.9282+-0.5834            3.7892+-0.3000          might be 1.0367x faster
   date-format-tofte                                  9.5456+-0.2658            9.3586+-0.2512          might be 1.0200x faster
   date-format-xparb                                  5.7915+-0.1684     ?      6.0771+-0.5477        ? might be 1.0493x slower
   math-cordic                                        3.2695+-0.4314            3.2180+-0.3593          might be 1.0160x faster
   math-partial-sums                                  5.7795+-0.7379            5.6410+-0.6846          might be 1.0246x faster
   math-spectral-norm                                 2.0442+-0.0407            2.0131+-0.0191          might be 1.0154x faster
   regexp-dna                                         7.7138+-0.6036            7.5404+-0.2039          might be 1.0230x faster
   string-base64                                      5.1719+-0.2584            5.0114+-0.1968          might be 1.0320x faster
   string-fasta                                       6.9038+-0.1431     ?      7.1592+-0.5351        ? might be 1.0370x slower
   string-tagcloud                                    9.4673+-0.2651     ?      9.8449+-0.5560        ? might be 1.0399x slower
   string-unpack-code                                21.0815+-0.9895     ?     21.9985+-1.2319        ? might be 1.0435x slower
   string-validate-input                              6.1742+-0.1756            6.0006+-0.1562          might be 1.0289x faster

   <arithmetic>                                       5.4625+-0.0463     ?      5.4780+-0.0994        ? might be 1.0028x slower

                                                        TipOfTree                    ABC                                        
LongSpider:
   3d-cube                                          890.6830+-38.7655    !   1140.6213+-39.8872       ! definitely 1.2806x slower
   3d-morph                                        1529.4299+-5.5338         1528.6065+-4.7346        
   3d-raytrace                                      700.0050+-5.5140     ?    705.2288+-22.6030       ?
   access-binary-trees                             1012.2520+-9.0308     ?   1015.2680+-8.4333        ?
   access-fannkuch                                  342.5678+-9.8797          341.9983+-7.5917        
   access-nbody                                     622.6018+-58.3607         588.4920+-0.8545          might be 1.0580x faster
   access-nsieve                                    478.9797+-7.0967          474.3830+-6.4629        
   bitops-3bit-bits-in-byte                          44.4413+-0.7706     ?     44.4815+-0.8591        ?
   bitops-bits-in-byte                               99.3187+-0.8950           98.9467+-1.4040        
   bitops-nsieve-bits                               427.7233+-19.9629         419.5245+-2.4038          might be 1.0195x faster
   controlflow-recursive                            494.6224+-11.3762    ^    471.3984+-9.7109        ^ definitely 1.0493x faster
   crypto-aes                                       723.7477+-37.0114         685.7591+-23.5605         might be 1.0554x faster
   crypto-md5                                       524.3218+-6.3999     ?    530.9508+-20.2085       ? might be 1.0126x slower
   crypto-sha1                                      713.1667+-29.8680    ^    660.7652+-14.5036       ^ definitely 1.0793x faster
   date-format-tofte                                756.8373+-9.7671     ^    710.7300+-5.3521        ^ definitely 1.0649x faster
   date-format-xparb                                781.8886+-39.3341    ?    815.0981+-22.3160       ? might be 1.0425x slower
   hash-map                                         184.3162+-4.6735          182.2640+-2.4651          might be 1.0113x faster
   math-cordic                                      577.1937+-3.6865     ?    582.1088+-16.0278       ?
   math-partial-sums                                514.1036+-13.0745         510.2251+-5.0995        
   math-spectral-norm                               566.6598+-5.3762     ?    571.9282+-5.3573        ?
   string-base64                                    415.4056+-14.1096         411.6092+-3.7756        
   string-fasta                                     437.4764+-4.0240     ?    438.6787+-3.1826        ?
   string-tagcloud                                  194.3930+-2.1499     ?    199.0745+-5.0888        ? might be 1.0241x slower

   <geometric>                                      458.2025+-3.3464     ?    458.2367+-1.7082        ? might be 1.0001x slower

                                                        TipOfTree                    ABC                                        
V8Spider:
   crypto                                            58.4829+-1.3024           57.0349+-2.3922          might be 1.0254x faster
   deltablue                                        104.2959+-3.7325     ?    113.0036+-32.3463       ? might be 1.0835x slower
   earley-boyer                                      48.5331+-1.9081     ?     49.9815+-2.8647        ? might be 1.0298x slower
   raytrace                                          41.8403+-0.9828     ?     43.2250+-3.3068        ? might be 1.0331x slower
   regexp                                            84.2419+-23.0458          74.9963+-1.1924          might be 1.1233x faster
   richards                                          81.7282+-2.6755           81.1254+-3.3964        
   splay                                             39.6808+-1.6475     ?     40.8530+-2.0333        ? might be 1.0295x slower

   <geometric>                                       61.4565+-2.2759     ?     61.6048+-2.1715        ? might be 1.0024x slower

                                                        TipOfTree                    ABC                                        
Octane:
   encrypt                                           0.20318+-0.00076          0.20124+-0.00870       
   decrypt                                           3.76633+-0.39142    ^     3.28584+-0.01509       ^ definitely 1.1462x faster
   deltablue                                x2       0.19597+-0.00155    ^     0.18933+-0.00223       ^ definitely 1.0351x faster
   earley                                            0.39422+-0.00179          0.39336+-0.00445       
   boyer                                             5.23743+-0.23507    ?     5.25768+-0.17408       ?
   navier-stokes                            x2       5.23417+-0.15376          5.12778+-0.01154         might be 1.0207x faster
   raytrace                                 x2       1.31490+-0.05422          1.29543+-0.04545         might be 1.0150x faster
   richards                                 x2       0.12803+-0.00158    ?     0.13015+-0.00317       ? might be 1.0165x slower
   splay                                    x2       0.39624+-0.00310    ?     0.39799+-0.00518       ?
   regexp                                   x2      29.78264+-0.31076         29.40092+-0.17937         might be 1.0130x faster
   pdfjs                                    x2      42.51933+-0.31240    ?    42.90453+-0.44607       ?
   mandreel                                 x2      51.21850+-0.50385    ?    54.23294+-9.25712       ? might be 1.0589x slower
   gbemu                                    x2      44.73400+-2.52451    ?    46.22316+-5.01127       ? might be 1.0333x slower
   closure                                           0.56506+-0.00232          0.56390+-0.00189       
   jquery                                            7.36495+-0.03864          7.34849+-0.05585       
   box2d                                    x2      11.89721+-0.03822    ?    12.01815+-0.31557       ? might be 1.0102x slower
   zlib                                     x2     398.51021+-2.74132        396.72526+-3.30054       
   typescript                               x2     825.53719+-16.44883       820.23372+-15.29671      

   <geometric>                                       6.60432+-0.04585          6.58325+-0.10602         might be 1.0032x faster

                                                        TipOfTree                    ABC                                        
Kraken:
   ai-astar                                          240.346+-7.598            233.631+-5.403           might be 1.0287x faster
   audio-beat-detection                               85.089+-7.178             83.334+-1.936           might be 1.0211x faster
   audio-dft                                         120.484+-2.807      ?     127.918+-13.981        ? might be 1.0617x slower
   audio-fft                                          70.741+-2.293      ?      71.485+-1.953         ? might be 1.0105x slower
   audio-oscillator                                   77.358+-1.535      ?      78.441+-2.207         ? might be 1.0140x slower
   imaging-darkroom                                  106.393+-3.655            105.664+-2.095         
   imaging-desaturate                                 64.450+-2.115             62.253+-2.412           might be 1.0353x faster
   imaging-gaussian-blur                             117.106+-5.205      ^     108.681+-1.639         ^ definitely 1.0775x faster
   json-parse-financial                               47.716+-1.949      ?      47.970+-1.737         ?
   json-stringify-tinderbox                           33.215+-9.437             31.445+-2.748           might be 1.0563x faster
   stanford-crypto-aes                                59.770+-1.400             58.646+-0.550           might be 1.0192x faster
   stanford-crypto-ccm                                48.867+-0.594      ?      49.508+-1.428         ? might be 1.0131x slower
   stanford-crypto-pbkdf2                            113.197+-2.883      ^     109.559+-0.480         ^ definitely 1.0332x faster
   stanford-crypto-sha256-iterative                   45.042+-2.097             43.202+-1.455           might be 1.0426x faster

   <arithmetic>                                       87.841+-0.595             86.553+-1.054           might be 1.0149x faster

                                                        TipOfTree                    ABC                                        
JSRegress:
   abc-forward-loop-equal                            73.6025+-0.9687     ^     47.9151+-1.3648        ^ definitely 1.5361x faster
   abc-postfix-backward-loop                         73.9181+-2.1473     ^     48.4234+-2.0258        ^ definitely 1.5265x faster
   abc-simple-backward-loop                          73.5877+-2.1058     ^     46.6553+-0.4208        ^ definitely 1.5773x faster
   abc-simple-forward-loop                           73.1920+-0.9242     ^     48.1729+-1.6541        ^ definitely 1.5194x faster
   abs-boolean                                        2.7342+-0.0805     ?      2.7607+-0.1672        ?
   adapt-to-double-divide                            16.6711+-0.2743     ?     16.9772+-0.4318        ? might be 1.0184x slower
   aliased-arguments-getbyval                         1.3217+-0.0406     ?      1.3372+-0.0852        ? might be 1.0117x slower
   allocate-big-object                                2.8967+-0.0636     ?      3.0623+-0.2078        ? might be 1.0572x slower
   arguments-named-and-reflective                    12.4870+-0.3296     ?     12.6454+-0.6824        ? might be 1.0127x slower
   arguments-out-of-bounds                           14.6392+-0.1548     ?     15.6589+-1.6785        ? might be 1.0697x slower
   arguments-strict-mode                             12.2167+-3.1572           11.3076+-1.2321          might be 1.0804x faster
   arguments                                         10.5094+-2.2274            9.9008+-0.8508          might be 1.0615x faster
   arity-mismatch-inlining                            0.9648+-0.1631            0.8715+-0.0195          might be 1.1071x faster
   array-access-polymorphic-structure                 7.3603+-0.9702            6.9139+-0.1238          might be 1.0646x faster
   array-nonarray-polymorhpic-access                 33.0238+-1.3201           32.1090+-0.9613          might be 1.0285x faster
   array-prototype-every                             88.2775+-3.0355           87.9590+-2.3232        
   array-prototype-forEach                           85.1885+-2.5273     ?     86.4713+-2.3871        ? might be 1.0151x slower
   array-prototype-map                               93.3508+-1.7576           92.7841+-4.1128        
   array-prototype-reduce                            87.7057+-5.3469           83.1573+-1.9805          might be 1.0547x faster
   array-prototype-reduceRight                       86.9582+-2.7088           82.9364+-1.6607          might be 1.0485x faster
   array-prototype-some                              87.3272+-2.8074           86.4393+-3.6196          might be 1.0103x faster
   array-splice-contiguous                           43.0173+-1.8810     ?     43.0222+-1.8602        ?
   array-with-double-add                              4.2592+-0.0470            4.2292+-0.0847        
   array-with-double-increment                        3.4484+-0.3510            3.3625+-0.1289          might be 1.0255x faster
   array-with-double-mul-add                          5.3029+-0.1488            5.2023+-0.0937          might be 1.0193x faster
   array-with-double-sum                              3.3862+-0.0677     ?      3.4049+-0.2426        ?
   array-with-int32-add-sub                           6.8784+-0.1067            6.8080+-0.0358          might be 1.0103x faster
   array-with-int32-or-double-sum                     3.3977+-0.0422     ?      3.5017+-0.2115        ? might be 1.0306x slower
   ArrayBuffer-DataView-alloc-large-long-lived   
                                                     39.8325+-2.3809           37.1976+-1.5283          might be 1.0708x faster
   ArrayBuffer-DataView-alloc-long-lived             14.6883+-0.5103     ?     15.5661+-1.5088        ? might be 1.0598x slower
   ArrayBuffer-Int32Array-byteOffset                  3.9935+-0.3258            3.8632+-0.1678          might be 1.0337x faster
   ArrayBuffer-Int8Array-alloc-large-long-lived   
                                                     39.0132+-3.3441           38.9919+-0.9911        
   ArrayBuffer-Int8Array-alloc-long-lived-buffer   
                                                     23.8928+-3.4078           22.8375+-1.4626          might be 1.0462x faster
   ArrayBuffer-Int8Array-alloc-long-lived            14.8730+-1.7634           14.5287+-1.8609          might be 1.0237x faster
   ArrayBuffer-Int8Array-alloc                       12.5103+-2.5156           10.4500+-0.2727          might be 1.1971x faster
   asmjs_bool_bug                                     7.9433+-0.2817            7.8689+-0.2275        
   assign-custom-setter-polymorphic                   3.3749+-0.4290            3.3092+-0.3704          might be 1.0198x faster
   assign-custom-setter                               4.6082+-0.3362            4.3802+-0.0676          might be 1.0520x faster
   basic-set                                          9.6806+-0.5041            9.5392+-0.1386          might be 1.0148x faster
   big-int-mul                                        4.1491+-0.1607            4.0790+-0.0424          might be 1.0172x faster
   boolean-test                                       3.2988+-0.3005            3.2381+-0.1153          might be 1.0187x faster
   branch-fold                                        4.3620+-0.4053     ?      4.5640+-0.6007        ? might be 1.0463x slower
   branch-on-string-as-boolean                       21.5431+-2.4735           20.7898+-1.5859          might be 1.0362x faster
   by-val-generic                                     9.0096+-0.5990            8.5437+-0.2453          might be 1.0545x faster
   call-spread-apply                                 30.7021+-2.1442           29.5722+-0.6297          might be 1.0382x faster
   call-spread-call                                  25.4045+-0.5153     ?     26.6822+-1.3813        ? might be 1.0503x slower
   captured-assignments                               0.5625+-0.0419            0.5573+-0.0709        
   cast-int-to-double                                 5.5354+-0.2060            5.3190+-0.1547          might be 1.0407x faster
   cell-argument                                      9.3733+-0.9406            8.7155+-0.3000          might be 1.0755x faster
   cfg-simplify                                       3.3274+-0.8132            2.9451+-0.1031          might be 1.1298x faster
   chain-getter-access                                9.8833+-1.2247            9.6292+-0.4128          might be 1.0264x faster
   cmpeq-obj-to-obj-other                            12.6815+-1.0205     ?     12.7437+-0.8447        ?
   constant-test                                      5.0924+-0.1910     ?      5.1292+-0.1775        ?
   create-lots-of-functions                          11.7617+-0.3572     ?     11.8509+-0.3374        ?
   cse-new-array-buffer                               2.5133+-0.0367     ?      2.6012+-0.1673        ? might be 1.0350x slower
   cse-new-array                                      2.6385+-0.0383     ?      2.7156+-0.1008        ? might be 1.0292x slower
   DataView-custom-properties                        42.7686+-2.8926     ?     43.5024+-2.6081        ? might be 1.0172x slower
   deconstructing-parameters-overridden-by-function   
                                                      0.6158+-0.0697            0.5905+-0.0368          might be 1.0428x faster
   delay-tear-off-arguments-strictmode               14.7164+-0.6468           14.0817+-0.2377          might be 1.0451x faster
   deltablue-varargs                                210.6804+-1.0489     ?    214.3517+-3.9082        ? might be 1.0174x slower
   destructuring-arguments                           17.5636+-0.4453           17.4349+-0.5357        
   destructuring-swap                                 5.1857+-0.1475            5.1167+-0.0710          might be 1.0135x faster
   direct-arguments-getbyval                          1.3606+-0.0956     ?      1.4508+-0.1937        ? might be 1.0662x slower
   div-boolean-double                                 5.4179+-0.3406            5.3109+-0.1377          might be 1.0202x faster
   div-boolean                                        7.8466+-0.0374            7.8442+-0.0523        
   double-get-by-val-out-of-bounds                    4.7781+-0.1063            4.6592+-0.1185          might be 1.0255x faster
   double-pollution-getbyval                          9.0463+-0.2135            8.9827+-0.1291        
   double-pollution-putbyoffset                       4.5760+-0.5044            4.3854+-0.0692          might be 1.0435x faster
   double-real-use                                   29.9740+-0.8371     ?     30.1638+-0.8119        ?
   double-to-int32-typed-array-no-inline              2.5520+-0.1843            2.5119+-0.2927          might be 1.0160x faster
   double-to-int32-typed-array                        2.1267+-0.1972     ?      2.1704+-0.1837        ? might be 1.0205x slower
   double-to-uint32-typed-array-no-inline             2.8360+-0.3013            2.7209+-0.3332          might be 1.0423x faster
   double-to-uint32-typed-array                       2.0821+-0.1314     ?      2.2505+-0.3216        ? might be 1.0809x slower
   elidable-new-object-dag                           43.6725+-0.9335     ?     45.4315+-2.7797        ? might be 1.0403x slower
   elidable-new-object-roflcopter                    44.4695+-1.4983           44.4169+-1.0016        
   elidable-new-object-then-call                     41.1300+-2.4055           39.5589+-0.6322          might be 1.0397x faster
   elidable-new-object-tree                          45.4648+-1.3264           45.4292+-1.0665        
   empty-string-plus-int                              5.7161+-0.1171            5.5635+-0.1710          might be 1.0274x faster
   emscripten-cube2hash                              38.7563+-1.6686     ?     38.9558+-1.2127        ?
   exit-length-on-plain-object                       14.8441+-1.6145     ?     16.0308+-2.7271        ? might be 1.0799x slower
   external-arguments-getbyval                        1.3586+-0.1526            1.2852+-0.0952          might be 1.0571x faster
   external-arguments-putbyval                        2.6578+-0.2187            2.5067+-0.2570          might be 1.0603x faster
   fixed-typed-array-storage-var-index                1.2992+-0.1467            1.2492+-0.0631          might be 1.0400x faster
   fixed-typed-array-storage                          0.9058+-0.0413     ?      0.9875+-0.1856        ? might be 1.0902x slower
   Float32Array-matrix-mult                           4.9937+-0.3738            4.9020+-0.5973          might be 1.0187x faster
   Float32Array-to-Float64Array-set                  57.9413+-3.1456     ^     52.4293+-1.9126        ^ definitely 1.1051x faster
   Float64Array-alloc-long-lived                     87.2984+-2.0573     ?     87.9021+-2.2689        ?
   Float64Array-to-Int16Array-set                    72.3487+-1.1167           70.5978+-1.4554          might be 1.0248x faster
   fold-double-to-int                                13.7404+-0.3264     ?     13.8574+-0.5717        ?
   fold-get-by-id-to-multi-get-by-offset-rare-int   
                                                     10.8985+-0.5474     ?     11.2330+-1.7562        ? might be 1.0307x slower
   fold-get-by-id-to-multi-get-by-offset              9.9895+-1.5700     ?     10.4126+-0.6623        ? might be 1.0424x slower
   fold-multi-get-by-offset-to-get-by-offset   
                                                      9.3152+-0.9816     ?      9.3357+-0.7551        ?
   fold-multi-get-by-offset-to-poly-get-by-offset   
                                                      9.2593+-0.8379     ?      9.4773+-0.6496        ? might be 1.0235x slower
   fold-multi-put-by-offset-to-poly-put-by-offset   
                                                     10.1844+-1.2198     ?     10.4349+-0.7655        ? might be 1.0246x slower
   fold-multi-put-by-offset-to-put-by-offset   
                                                      8.3315+-0.7275            8.0023+-0.4197          might be 1.0411x faster
   fold-multi-put-by-offset-to-replace-or-transition-put-by-offset   
                                                      9.8145+-0.4245     ?     10.8479+-0.9448        ? might be 1.1053x slower
   fold-put-by-id-to-multi-put-by-offset              9.6420+-0.8663     ?     10.3847+-0.8002        ? might be 1.0770x slower
   fold-put-structure                                 7.5278+-1.3544            7.1348+-1.2024          might be 1.0551x faster
   for-of-iterate-array-entries                       4.7769+-0.3310     ?      4.7933+-0.2735        ?
   for-of-iterate-array-keys                          3.9648+-0.2261            3.8217+-0.0824          might be 1.0375x faster
   for-of-iterate-array-values                        3.6891+-0.0659     ?      3.8044+-0.0678        ? might be 1.0313x slower
   fround                                            21.7183+-1.5143           21.1999+-0.6045          might be 1.0245x faster
   ftl-library-inlining-dataview                     67.8471+-5.4248           66.2961+-3.1446          might be 1.0234x faster
   ftl-library-inlining                              76.8132+-15.6186          76.2906+-18.2989       
   function-dot-apply                                 2.3559+-0.2435     ?      2.4719+-0.3391        ? might be 1.0492x slower
   function-test                                      3.0770+-0.1929            3.0055+-0.0296          might be 1.0238x faster
   function-with-eval                               104.0791+-4.7794     ?    105.6725+-4.5839        ? might be 1.0153x slower
   gcse-poly-get-less-obvious                        18.7931+-0.8232           18.5475+-0.8243          might be 1.0132x faster
   gcse-poly-get                                     20.6963+-1.9458           19.8279+-0.9306          might be 1.0438x faster
   gcse                                               4.4638+-0.2140            4.4188+-0.2069          might be 1.0102x faster
   get-by-id-bimorphic-check-structure-elimination-simple   
                                                      2.8201+-0.1125     ?      2.9106+-0.1834        ? might be 1.0321x slower
   get-by-id-bimorphic-check-structure-elimination   
                                                      6.2723+-0.5162            6.0590+-0.1227          might be 1.0352x faster
   get-by-id-chain-from-try-block                     7.4889+-1.6102            6.9049+-0.2186          might be 1.0846x faster
   get-by-id-check-structure-elimination              5.1661+-0.1016     ?      5.4313+-0.5828        ? might be 1.0513x slower
   get-by-id-proto-or-self                           19.1172+-1.4398           18.6596+-1.7199          might be 1.0245x faster
   get-by-id-quadmorphic-check-structure-elimination-simple   
                                                      3.0314+-0.0872     ?      3.0980+-0.2665        ? might be 1.0220x slower
   get-by-id-self-or-proto                           19.2998+-1.8863           18.7932+-0.8972          might be 1.0270x faster
   get-by-val-out-of-bounds                           4.5103+-0.1200            4.4760+-0.0484        
   get_callee_monomorphic                             3.2875+-0.7785            3.0190+-0.3264          might be 1.0889x faster
   get_callee_polymorphic                             3.7642+-0.0717     ?      4.1169+-0.5540        ? might be 1.0937x slower
   getter-no-activation                               5.0647+-0.2828            5.0073+-0.1746          might be 1.0115x faster
   getter-prototype                                  15.0355+-0.3293     ?     15.1189+-0.2121        ?
   getter-richards                                  123.0798+-4.1630     ?    123.6789+-3.4508        ?
   getter                                             6.0339+-0.7983     ?      6.3255+-0.7907        ? might be 1.0483x slower
   global-var-const-infer-fire-from-opt               0.9434+-0.0488     ?      0.9860+-0.1335        ? might be 1.0452x slower
   global-var-const-infer                             0.9741+-0.1541            0.8835+-0.1054          might be 1.1025x faster
   HashMap-put-get-iterate-keys                      30.2976+-2.4252     ?     30.5833+-1.8594        ?
   HashMap-put-get-iterate                           32.3424+-0.9235           32.2024+-1.1524        
   HashMap-string-put-get-iterate                    31.9597+-1.4072     ?     33.0144+-0.6667        ? might be 1.0330x slower
   hoist-make-rope                                   12.8953+-1.4380           12.6736+-0.8385          might be 1.0175x faster
   hoist-poly-check-structure-effectful-loop   
                                                      5.3238+-0.2068            5.2369+-0.2091          might be 1.0166x faster
   hoist-poly-check-structure                         3.8741+-0.2311            3.7651+-0.1186          might be 1.0290x faster
   imul-double-only                                   8.6515+-1.2234     ?      8.9180+-0.1768        ? might be 1.0308x slower
   imul-int-only                                      9.8797+-0.1847     ?     10.1685+-0.6209        ? might be 1.0292x slower
   imul-mixed                                         8.3288+-0.1564     ?      8.8255+-0.9465        ? might be 1.0596x slower
   in-four-cases                                     23.0736+-0.4894     ?     23.4517+-0.8238        ? might be 1.0164x slower
   in-one-case-false                                 11.0955+-0.0862     ?     11.2256+-0.2210        ? might be 1.0117x slower
   in-one-case-true                                  11.0851+-0.1177     ?     11.4117+-0.2756        ? might be 1.0295x slower
   in-two-cases                                      11.4632+-0.3421     ?     11.6889+-0.4664        ? might be 1.0197x slower
   indexed-properties-in-objects                      3.3645+-0.6451            3.0977+-0.3648          might be 1.0862x faster
   infer-closure-const-then-mov-no-inline             4.1952+-0.3983     ?      4.3245+-0.6095        ? might be 1.0308x slower
   infer-closure-const-then-mov                      20.1927+-0.6457           19.8562+-0.4493          might be 1.0169x faster
   infer-closure-const-then-put-to-scope-no-inline   
                                                     13.1636+-0.9691           12.7080+-0.1427          might be 1.0358x faster
   infer-closure-const-then-put-to-scope             21.7340+-0.8355     ?     23.4668+-2.0150        ? might be 1.0797x slower
   infer-closure-const-then-reenter-no-inline   
                                                     54.5461+-1.4107     ?     55.6296+-2.4980        ? might be 1.0199x slower
   infer-closure-const-then-reenter                  22.7887+-1.4661     ?     23.3534+-1.4303        ? might be 1.0248x slower
   infer-constant-global-property                     3.6449+-0.1310     ?      3.7842+-0.2367        ? might be 1.0382x slower
   infer-constant-property                            2.8054+-0.1015     ?      2.8993+-0.3746        ? might be 1.0334x slower
   infer-one-time-closure-ten-vars                   13.2291+-1.0406           12.8459+-0.9171          might be 1.0298x faster
   infer-one-time-closure-two-vars                   12.0669+-0.3393     ?     12.7440+-1.3240        ? might be 1.0561x slower
   infer-one-time-closure                            12.3604+-0.4168     ?     12.8422+-1.2639        ? might be 1.0390x slower
   infer-one-time-deep-closure                       21.7063+-1.2946           21.2054+-1.0019          might be 1.0236x faster
   inline-arguments-access                            5.0096+-0.6776            4.6694+-0.0627          might be 1.0729x faster
   inline-arguments-aliased-access                    4.8414+-0.3526            4.6692+-0.0552          might be 1.0369x faster
   inline-arguments-local-escape                      4.7723+-0.1471            4.7703+-0.2429        
   inline-get-scoped-var                              4.9910+-0.2773     ?      5.1343+-0.3683        ? might be 1.0287x slower
   inlined-put-by-id-transition                      11.8484+-0.4379           11.8181+-0.4799        
   int-or-other-abs-then-get-by-val                   5.0133+-0.0716     ?      5.0515+-0.1304        ?
   int-or-other-abs-zero-then-get-by-val             17.7474+-0.9941           17.6337+-0.4970        
   int-or-other-add-then-get-by-val                   4.4097+-0.0787     ?      4.5315+-0.4379        ? might be 1.0276x slower
   int-or-other-add                                   5.5052+-0.1663            5.4724+-0.1995        
   int-or-other-div-then-get-by-val                   4.2903+-0.0318     ?      4.3975+-0.1859        ? might be 1.0250x slower
   int-or-other-max-then-get-by-val                   4.4191+-0.1271            4.3694+-0.0881          might be 1.0114x faster
   int-or-other-min-then-get-by-val                   4.3749+-0.0757            4.3540+-0.0438        
   int-or-other-mod-then-get-by-val                   3.9631+-0.0826     ?      4.0028+-0.1254        ? might be 1.0100x slower
   int-or-other-mul-then-get-by-val                   3.9622+-0.0516     ?      4.0303+-0.1900        ? might be 1.0172x slower
   int-or-other-neg-then-get-by-val                   4.8656+-0.0848            4.7885+-0.0298          might be 1.0161x faster
   int-or-other-neg-zero-then-get-by-val             18.2415+-0.6753     ?     18.6864+-0.9009        ? might be 1.0244x slower
   int-or-other-sub-then-get-by-val                   4.4045+-0.0417            4.3991+-0.0763        
   int-or-other-sub                                   3.9119+-0.4209            3.6916+-0.0864          might be 1.0597x faster
   int-overflow-local                                 4.7029+-0.1972            4.6429+-0.2282          might be 1.0129x faster
   Int16Array-alloc-long-lived                       53.6401+-2.0327           52.9918+-1.8406          might be 1.0122x faster
   Int16Array-bubble-sort-with-byteLength            20.3352+-0.7253           20.3263+-0.7909        
   Int16Array-bubble-sort                            20.9904+-1.4695           20.7103+-0.6193          might be 1.0135x faster
   Int16Array-load-int-mul                            1.6446+-0.1973            1.5525+-0.0459          might be 1.0593x faster
   Int16Array-to-Int32Array-set                      58.0521+-1.4255     ^     54.5826+-1.9112        ^ definitely 1.0636x faster
   Int32Array-alloc-large                            23.5260+-0.6622     ?     24.3186+-1.6381        ? might be 1.0337x slower
   Int32Array-alloc-long-lived                       63.9761+-1.0218     ?     64.6050+-0.6842        ?
   Int32Array-alloc                                   3.5107+-0.2775            3.4315+-0.0521          might be 1.0231x faster
   Int32Array-Int8Array-view-alloc                    6.8626+-0.2167     ?      7.8508+-2.2408        ? might be 1.1440x slower
   int52-spill                                        5.8182+-0.1166            5.7662+-0.1564        
   Int8Array-alloc-long-lived                        48.7320+-1.9451     ?     49.5735+-0.3191        ? might be 1.0173x slower
   Int8Array-load-with-byteLength                     3.4141+-0.0547     ?      3.6268+-0.4459        ? might be 1.0623x slower
   Int8Array-load                                     3.9264+-0.4856            3.5484+-0.4019          might be 1.1065x faster
   integer-divide                                    10.9251+-0.0779     ?     10.9679+-0.1299        ?
   integer-modulo                                     2.3058+-0.2905            2.1050+-0.0724          might be 1.0954x faster
   is-boolean-fold-tricky                             4.5074+-0.1120     ?      4.6405+-0.5217        ? might be 1.0295x slower
   is-boolean-fold                                    2.8925+-0.0421            2.8910+-0.0561        
   is-function-fold-tricky-internal-function   
                                                     12.1363+-0.4721           11.7588+-0.1012          might be 1.0321x faster
   is-function-fold-tricky                            4.7861+-0.4313            4.5869+-0.0944          might be 1.0434x faster
   is-function-fold                                   2.9915+-0.0814            2.9571+-0.0672          might be 1.0117x faster
   is-number-fold-tricky                              4.7229+-0.5645            4.5131+-0.0727          might be 1.0465x faster
   is-number-fold                                     2.9056+-0.0579     ?      2.9970+-0.2070        ? might be 1.0315x slower
   is-object-or-null-fold-functions                   3.0999+-0.1690            3.0916+-0.3601        
   is-object-or-null-fold-less-tricky                 4.7891+-0.3103            4.5990+-0.1067          might be 1.0413x faster
   is-object-or-null-fold-tricky                      6.7646+-0.1303            6.6744+-0.0926          might be 1.0135x faster
   is-object-or-null-fold                             2.9364+-0.0615     ?      3.0175+-0.1886        ? might be 1.0276x slower
   is-object-or-null-trickier-function                4.8338+-0.1815     ?      4.9655+-0.6109        ? might be 1.0272x slower
   is-object-or-null-trickier-internal-function   
                                                     12.4110+-0.1194           12.3937+-0.0733        
   is-object-or-null-tricky-function                  4.6174+-0.0874     ?      4.7801+-0.2581        ? might be 1.0352x slower
   is-object-or-null-tricky-internal-function   
                                                      9.3198+-0.0877            9.3159+-0.1132        
   is-string-fold-tricky                              4.5444+-0.1354     ?      4.8885+-0.4509        ? might be 1.0757x slower
   is-string-fold                                     2.9506+-0.1473     ?      2.9712+-0.2620        ?
   is-undefined-fold-tricky                           3.7465+-0.0399     ?      3.8036+-0.0601        ? might be 1.0152x slower
   is-undefined-fold                                  3.0174+-0.2315            2.9947+-0.2924        
   large-int-captured                                 4.9521+-0.0880            4.8966+-0.1299          might be 1.0113x faster
   large-int-neg                                     16.5185+-1.0041           16.2873+-0.4356          might be 1.0142x faster
   large-int                                         14.7549+-0.4576     ?     14.9762+-0.4066        ? might be 1.0150x slower
   load-varargs-elimination                          22.8980+-0.3078     ?     23.7988+-1.3655        ? might be 1.0393x slower
   logical-not-weird-types                            3.3936+-0.0237     ?      3.5672+-0.3781        ? might be 1.0511x slower
   logical-not                                        4.6740+-0.0198     ?      4.8042+-0.1560        ? might be 1.0279x slower
   lots-of-fields                                    12.7179+-0.7427           12.1534+-0.1420          might be 1.0464x faster
   make-indexed-storage                               3.3097+-0.1025            3.3097+-0.1983        
   make-rope-cse                                     13.0005+-1.3301           12.2858+-1.5559          might be 1.0582x faster
   marsaglia-larger-ints                             36.6676+-0.7556     ?     37.4895+-1.4773        ? might be 1.0224x slower
   marsaglia-osr-entry                               23.2181+-0.9723     ?     24.0225+-1.5444        ? might be 1.0346x slower
   math-with-out-of-bounds-array-values              25.4114+-1.1494     ?     25.4931+-1.5525        ?
   max-boolean                                        2.6758+-0.3145            2.5130+-0.0293          might be 1.0648x faster
   method-on-number                                  17.9859+-0.6444     ?     19.0315+-0.9539        ? might be 1.0581x slower
   min-boolean                                        2.5653+-0.0980     ?      2.7703+-0.3775        ? might be 1.0799x slower
   minus-boolean-double                               3.3456+-0.2797            3.2171+-0.0653          might be 1.0400x faster
   minus-boolean                                      2.5597+-0.2769            2.5028+-0.2855          might be 1.0227x faster
   misc-strict-eq                                    41.0668+-5.8039           38.0527+-0.5467          might be 1.0792x faster
   mod-boolean-double                                11.1704+-0.4619           10.9989+-0.1570          might be 1.0156x faster
   mod-boolean                                        7.8923+-0.0331     ?      8.0937+-0.2766        ? might be 1.0255x slower
   mul-boolean-double                                 3.8723+-0.3476            3.8647+-0.1807        
   mul-boolean                                        3.0049+-0.2775            2.9480+-0.0426          might be 1.0193x faster
   neg-boolean                                        3.2545+-0.0784     ?      3.2915+-0.1734        ? might be 1.0114x slower
   negative-zero-divide                               0.4167+-0.0416            0.3849+-0.0135          might be 1.0827x faster
   negative-zero-modulo                               0.4042+-0.0351     ?      0.4453+-0.0424        ? might be 1.1017x slower
   negative-zero-negate                               0.3867+-0.0353     ?      0.4021+-0.0526        ? might be 1.0400x slower
   nested-function-parsing                           39.7114+-1.2322     ?     39.9244+-1.2405        ?
   new-array-buffer-dead                            113.3550+-2.4389          113.0735+-1.6879        
   new-array-buffer-push                              7.2833+-0.6878     ?      7.3370+-0.6384        ?
   new-array-dead                                    20.0577+-0.9805           19.9032+-1.1354        
   new-array-push                                     6.5542+-0.1692     ?      6.6046+-0.2462        ?
   no-inline-constructor                             42.3860+-0.9909           41.7125+-0.9925          might be 1.0161x faster
   number-test                                        3.2441+-0.2985     ?      3.2539+-0.2733        ?
   object-closure-call                                5.6760+-0.0625     ?      6.0106+-0.6846        ? might be 1.0589x slower
   object-test                                        2.9878+-0.1964            2.9071+-0.0602          might be 1.0278x faster
   obvious-sink-pathology-taken                     142.5278+-2.0688     ?    142.9125+-2.8109        ?
   obvious-sink-pathology                           132.3582+-2.6706     ?    133.4755+-2.3593        ?
   obviously-elidable-new-object                     37.1518+-3.2908           34.6395+-0.4698          might be 1.0725x faster
   plus-boolean-arith                                 2.7072+-0.3261            2.6479+-0.1647          might be 1.0224x faster
   plus-boolean-double                                3.2952+-0.1373            3.2795+-0.1074        
   plus-boolean                                       2.4724+-0.1083            2.4576+-0.0756        
   poly-chain-access-different-prototypes-simple   
                                                      3.3319+-0.0563     ?      3.4477+-0.3690        ? might be 1.0348x slower
   poly-chain-access-different-prototypes             2.7330+-0.3133            2.6183+-0.0246          might be 1.0438x faster
   poly-chain-access-simpler                          3.4047+-0.1360            3.3668+-0.0699          might be 1.0113x faster
   poly-chain-access                                  2.6913+-0.1050     ?      2.7463+-0.3154        ? might be 1.0204x slower
   poly-stricteq                                     64.4800+-2.1431           62.3552+-0.6170          might be 1.0341x faster
   polymorphic-array-call                             1.3929+-0.0355     ?      1.4465+-0.1111        ? might be 1.0384x slower
   polymorphic-get-by-id                              3.2911+-0.1556     ?      3.3894+-0.2967        ? might be 1.0299x slower
   polymorphic-put-by-id                             32.7212+-3.7259           30.7568+-1.8773          might be 1.0639x faster
   polymorphic-structure                             15.8531+-1.3805           15.5669+-1.0791          might be 1.0184x faster
   polyvariant-monomorphic-get-by-id                  8.5969+-0.1151     ?      8.9930+-0.5324        ? might be 1.0461x slower
   proto-getter-access                                9.3920+-0.1773     ?      9.3931+-0.1185        ?
   put-by-id-replace-and-transition                   9.9880+-0.6587            9.7309+-0.2145          might be 1.0264x faster
   put-by-id-slightly-polymorphic                     2.8557+-0.0333            2.8434+-0.0184        
   put-by-id                                         12.8522+-0.2451     ?     12.9682+-0.4048        ?
   put-by-val-direct                                  0.4438+-0.0602     ?      0.4496+-0.1124        ? might be 1.0131x slower
   put-by-val-large-index-blank-indexing-type   
                                                     12.4135+-1.1070     ?     12.5429+-1.4810        ? might be 1.0104x slower
   put-by-val-machine-int                             2.9025+-0.0877            2.8631+-0.0589          might be 1.0138x faster
   rare-osr-exit-on-local                            15.3892+-0.8918           15.0562+-0.3774          might be 1.0221x faster
   register-pressure-from-osr                        22.2969+-1.1054           21.8652+-1.0931          might be 1.0197x faster
   repeat-multi-get-by-offset                        24.9307+-0.7400           24.6195+-0.1725          might be 1.0126x faster
   setter-prototype                                  10.5666+-0.2624           10.5648+-0.2953        
   setter                                             5.7303+-0.7680     ?      6.3505+-0.8466        ? might be 1.1082x slower
   simple-activation-demo                            25.6131+-0.7623           25.4016+-0.6236        
   simple-getter-access                              11.9830+-0.3254           11.7417+-0.2313          might be 1.0205x faster
   simple-poly-call-nested                            8.4688+-0.9278     ?      8.5124+-0.3311        ?
   simple-poly-call                                   1.3260+-0.0258     ?      1.3269+-0.0467        ?
   sin-boolean                                       23.0092+-1.1912     ?     23.3223+-1.0133        ? might be 1.0136x slower
   singleton-scope                                   62.3020+-0.9558           61.7810+-0.6363        
   sink-function                                     12.4285+-0.9190           12.1387+-0.2871          might be 1.0239x faster
   sink-huge-activation                              20.3552+-1.7253           19.6976+-0.8876          might be 1.0334x faster
   sinkable-new-object-dag                           71.7255+-2.7672           69.8969+-1.8405          might be 1.0262x faster
   sinkable-new-object-taken                         51.2249+-3.3976           50.6859+-2.7825          might be 1.0106x faster
   sinkable-new-object                               39.5233+-1.0839     ?     41.2115+-3.6710        ? might be 1.0427x slower
   slow-array-profile-convergence                     3.0177+-0.0971     ?      3.0555+-0.3643        ? might be 1.0125x slower
   slow-convergence                                   2.9187+-0.3555     ?      2.9672+-0.4235        ? might be 1.0166x slower
   slow-ternaries                                    21.6601+-3.6756           21.1895+-2.5571          might be 1.0222x faster
   sorting-benchmark                                 18.8253+-0.5517     ?     19.2882+-0.5913        ? might be 1.0246x slower
   sparse-conditional                                 1.1679+-0.0204     ?      1.2270+-0.0708        ? might be 1.0506x slower
   splice-to-remove                                  15.6229+-0.9510     ?     15.8502+-1.3496        ? might be 1.0145x slower
   string-char-code-at                               18.4179+-0.1285     ^     16.5096+-0.5827        ^ definitely 1.1156x faster
   string-concat-object                               2.7349+-0.2900     ?      2.7576+-0.2231        ?
   string-concat-pair-object                          2.6905+-0.2391     ?      2.6996+-0.1957        ?
   string-concat-pair-simple                         11.7960+-0.4949     ?     12.2258+-1.2118        ? might be 1.0364x slower
   string-concat-simple                              12.4346+-0.9646           12.4208+-1.1704        
   string-cons-repeat                                 8.3590+-0.9899            8.1318+-0.4683          might be 1.0279x faster
   string-cons-tower                                  8.5588+-0.4869            8.2474+-0.3040          might be 1.0378x faster
   string-equality                                   17.8814+-0.1920     ?     18.0708+-0.5400        ? might be 1.0106x slower
   string-get-by-val-big-char                         7.3714+-0.1336            7.2603+-0.0488          might be 1.0153x faster
   string-get-by-val-out-of-bounds-insane             3.6827+-0.1736            3.6766+-0.2041        
   string-get-by-val-out-of-bounds                    5.4482+-0.1264            5.4121+-0.0963        
   string-get-by-val                                  3.4799+-0.0630            3.4478+-0.0187        
   string-hash                                        2.5581+-0.6408            2.2007+-0.1078          might be 1.1624x faster
   string-long-ident-equality                        14.9967+-0.1613     ?     15.3324+-1.1821        ? might be 1.0224x slower
   string-out-of-bounds                              15.0730+-0.3874     ?     15.2620+-0.8009        ? might be 1.0125x slower
   string-repeat-arith                               34.7466+-1.9024     ?     35.4045+-2.0187        ? might be 1.0189x slower
   string-sub                                        66.4457+-4.0555           63.6180+-2.0203          might be 1.0444x faster
   string-test                                        3.0701+-0.1464     ?      3.2814+-0.3691        ? might be 1.0688x slower
   string-var-equality                               35.6313+-1.2027           34.4493+-0.4713          might be 1.0343x faster
   structure-hoist-over-transitions                   2.7623+-0.1404     ?      2.8167+-0.2406        ? might be 1.0197x slower
   substring-concat-weird                            46.2624+-6.2329           42.7163+-1.6373          might be 1.0830x faster
   substring-concat                                  45.3662+-0.5974           45.3566+-1.0569        
   substring                                         49.1640+-1.3968     ?     49.7642+-1.4507        ? might be 1.0122x slower
   switch-char-constant                               2.8826+-0.1569     ?      2.9658+-0.2142        ? might be 1.0288x slower
   switch-char                                        6.7598+-0.7396     ?      6.9812+-1.4313        ? might be 1.0327x slower
   switch-constant                                    8.4552+-0.1886     ?      8.5765+-0.2114        ? might be 1.0143x slower
   switch-string-basic-big-var                       18.4473+-0.4643           18.2308+-0.2909          might be 1.0119x faster
   switch-string-basic-big                           15.2839+-0.1936           15.2373+-0.2888        
   switch-string-basic-var                           15.2655+-0.2335           15.2538+-0.3069        
   switch-string-basic                               14.3184+-0.6364           13.7689+-0.1303          might be 1.0399x faster
   switch-string-big-length-tower-var                20.7455+-1.1375           20.5647+-0.1682        
   switch-string-length-tower-var                    15.2953+-0.1701     ?     15.5288+-0.3204        ? might be 1.0153x slower
   switch-string-length-tower                        13.5295+-0.9517           13.1297+-0.1271          might be 1.0304x faster
   switch-string-short                               13.2319+-0.1601           13.1533+-0.1806        
   switch                                            12.8947+-0.5134           12.6213+-0.2242          might be 1.0217x faster
   tear-off-arguments-simple                          3.6190+-0.1177            3.5153+-0.0965          might be 1.0295x faster
   tear-off-arguments                                 4.8798+-0.1771     ?      5.1623+-0.8191        ? might be 1.0579x slower
   temporal-structure                                12.3849+-0.2125           12.3272+-0.2220        
   to-int32-boolean                                  14.3859+-0.9917           14.0723+-0.1481          might be 1.0223x faster
   try-catch-get-by-val-cloned-arguments             15.7135+-1.8378     ?     15.9762+-1.6367        ? might be 1.0167x slower
   try-catch-get-by-val-direct-arguments              6.9626+-0.5344     ?      7.5288+-0.9644        ? might be 1.0813x slower
   try-catch-get-by-val-scoped-arguments              7.6732+-0.1095     !      8.2320+-0.3856        ! definitely 1.0728x slower
   typed-array-get-set-by-val-profiling              33.4799+-0.9323           29.8670+-2.9144          might be 1.1210x faster
   undefined-property-access                        346.9084+-8.7213          343.0378+-2.8125          might be 1.0113x faster
   undefined-test                                     3.1431+-0.1237            3.0842+-0.0446          might be 1.0191x faster
   unprofiled-licm                                   22.6274+-0.4465     ?     22.8323+-0.5741        ?
   varargs-call                                      15.7485+-1.3552           15.4881+-0.7854          might be 1.0168x faster
   varargs-construct-inline                          28.4900+-0.6379           28.0432+-0.4427          might be 1.0159x faster
   varargs-construct                                 22.9314+-1.2072           22.8966+-0.5234        
   varargs-inline                                     9.3843+-0.0912     ?      9.5475+-0.2397        ? might be 1.0174x slower
   varargs-strict-mode                               10.6836+-1.2587           10.6563+-1.2309        
   varargs                                           10.3165+-0.4105           10.0305+-0.1037          might be 1.0285x faster
   weird-inlining-const-prop                          3.5450+-0.3155            3.4519+-0.2207          might be 1.0270x faster

   <geometric>                                        9.2278+-0.0315     ^      9.1484+-0.0324        ^ definitely 1.0087x faster

                                                        TipOfTree                    ABC                                        
AsmBench:
   bigfib.cpp                                       500.0259+-2.0519     ?    502.4072+-3.0858        ?
   cray.c                                           426.9934+-1.3342     !    432.4208+-2.4383        ! definitely 1.0127x slower
   dry.c                                            491.8765+-3.9801     ?    500.0514+-26.6401       ? might be 1.0166x slower
   FloatMM.c                                        721.0229+-1.4392     ?    722.8960+-2.2162        ?
   gcc-loops.cpp                                   4102.5776+-15.5565    ?   4159.7092+-180.4979      ? might be 1.0139x slower
   n-body.c                                         973.5851+-4.5731     ?    974.2305+-6.5683        ?
   Quicksort.c                                      424.0225+-5.5440     ?    428.2373+-13.3896       ?
   stepanov_container.cpp                          3614.4546+-14.0813        3603.5605+-30.5310       
   Towers.c                                         256.9250+-2.2223     ?    263.0252+-13.0089       ? might be 1.0237x slower

   <geometric>                                      789.4308+-1.2350     ?    796.3984+-11.2864       ? might be 1.0088x slower

                                                        TipOfTree                    ABC                                        
CompressionBench:
   huffman                                          373.7850+-3.0668     ^    349.3406+-2.3634        ^ definitely 1.0700x faster
   arithmetic-simple                                369.0642+-9.8230     ^    337.8705+-2.8123        ^ definitely 1.0923x faster
   arithmetic-precise                               285.2642+-2.9885     ^    276.2625+-2.5717        ^ definitely 1.0326x faster
   arithmetic-complex-precise                       286.0733+-3.3122     ^    273.4120+-2.9124        ^ definitely 1.0463x faster
   arithmetic-precise-order-0                       378.1238+-3.1771          353.2037+-22.9201         might be 1.0706x faster
   arithmetic-precise-order-1                       335.6805+-5.1630          331.3655+-4.5926          might be 1.0130x faster
   arithmetic-precise-order-2                       372.7848+-19.6185         371.1562+-3.8474        
   arithmetic-simple-order-1                        428.7566+-3.7687     ^    405.5364+-10.3436       ^ definitely 1.0573x faster
   arithmetic-simple-order-2                        484.8106+-23.7478    ^    444.6417+-5.7557        ^ definitely 1.0903x faster
   lz-string                                        317.0408+-3.7909     ?    325.8456+-6.6934        ? might be 1.0278x slower

   <geometric>                                      358.4650+-3.5872     ^    343.2589+-2.5697        ^ definitely 1.0443x faster

                                                        TipOfTree                    ABC                                        
Geomean of preferred means:
   <scaled-result>                                   62.5019+-0.1965           62.0662+-0.4398          might be 1.0070x faster

[Filip Pizlo]

Created attachment 254993 [details]
getting ready for landing

[WebKit Commit Bot]

Attachment 254993 [details] did not pass style-queue:


ERROR: Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:329:  Place brace on its own line for function definitions.  [whitespace/braces] [4]
ERROR: Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:894:  Boolean expressions that span multiple lines should have their operators on the left side of the line instead of the right side.  [whitespace/operators] [4]
ERROR: Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:894:  Multi line control clauses should use braces.  [whitespace/braces] [4]
ERROR: Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:1169:  Place brace on its own line for function definitions.  [whitespace/braces] [4]
ERROR: Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:1218:  Place brace on its own line for function definitions.  [whitespace/braces] [4]
Total errors found: 5 in 22 files


If any of these errors are false positives, please file a bug against check-webkit-style.

[Filip Pizlo]

Created attachment 254995 [details]
closer to landing

[WebKit Commit Bot]

Attachment 254995 [details] did not pass style-queue:


ERROR: Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:927:  Boolean expressions that span multiple lines should have their operators on the left side of the line instead of the right side.  [whitespace/operators] [4]
ERROR: Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:927:  Multi line control clauses should use braces.  [whitespace/braces] [4]
ERROR: Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:1202:  Place brace on its own line for function definitions.  [whitespace/braces] [4]
Total errors found: 3 in 22 files


If any of these errors are false positives, please file a bug against check-webkit-style.

[Filip Pizlo]

(In reply to comment #26)
> (In reply to comment #25)
> > Comment on attachment 254964 [details]
> > the patch
> > 
> > View in context:
> > https://bugs.webkit.org/attachment.cgi?id=254964&action=review
> > 
> > > Source/JavaScriptCore/ChangeLog:35
> > > +        * tests/stress/add-overflows-after-not-equal.js: Added.
> > > +        * tests/stress/sub-overflows-after-not-equal.js: Added.
> > 
> > IMHO, it would be worth adding stress tests to check anything you can come
> > up with.
> > 
> > It's not exactly a simple patch and we'll have very little time to discover
> > any unforeseen side effect.
> 
> Agreed.  I'll try to come up with more tests.
> 
> > 
> > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:714
> > > +        bool changed = true;
> > > +        while (changed) {
> > 
> > I think it would be good to explain the convergency trick on < and > with 1,
> > 0, -1 that you explained in your office. Otherwise it seems a bit mysterious
> > that this does not run forever.
> 
> OK.  I will try to say something about this.

The latest version simplifies this code and has a long discussion of convergence.

> 
> > 
> > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:1137
> > > +        if (m_seenBlocks.add(target)) {
> > 
> > What is inside the if() is pretty self contained. If it is possible to move
> > it to a function, that may make the code more readable.
> > 
> > Maybe:
> >     filterLiveRelationships(relationshipMap, target, [] (Node* node, const
> > Vector<Relationship>& liveRelationships)
> > ?
> 
> I'll try that.

I don't think this is so necessary anymore, because that code no longer involves that ugly functor.

> 
> > 
> > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:1170
> > > +        // are using RPO.
> > 
> > RPO -> reverse post-order traversal. I am not good at remembering acronyms :)
> 
> OK!
> 
> > 
> > > Source/JavaScriptCore/dfg/DFGIntegerRangeOptimizationPhase.cpp:1181
> > > +            Vector<Relationship> values;
> > 
> > values->mergedRelationships or something like that?
> 
> OK.

[Filip Pizlo]

Landed in http://trac.webkit.org/changeset/185640

[Alex Christensen]

32-bit build fix in http://trac.webkit.org/changeset/185646
Also, why doesn't 64-bit JSC compile with -Wshorten-64-to-32 ?

[Ryosuke Niwa]

Looks like this was 2% progresssion on Kraken according to our internal testing.