Bug 148664

*** Bug 146851 has been marked as a duplicate of this bug. ***

Created attachment 260631 [details] Patch

This doesn't properly handle OSR exit and will incorrectly leave the tail calling frames on the stack. A speculative test failure would be: ```` function bar() { if (isFinalTier()) OSRExit(); if (bar.caller !== null) throw new Error("Caller should be null."); } function foo() { "use strict"; return bar(); } for (var i = 0; i < 10000; ++i) foo(); ```` The patch needs to be updated to handle OSR exit.

Created attachment 261901 [details] Rebased patch Performance looks neutral: Baseline:/Users/msaboff/src/webkit.baseline/WebKitBuild/Release/JavaScriptCore.framework/Resources/jsc FTLTailCall:/Users/msaboff/src/webkit/WebKitBuild/Release/JavaScriptCore.framework/Resources/jsc Warning: could not identify checkout location for Baseline Warning: could not identify checkout location for FTLTailCall Warning: refusing to run JSBench because not all VMs are DumpRenderTree or WebKitTestRunner. Warning: refusing to run DSPJS because not all VMs are DumpRenderTree or WebKitTestRunner. 3940/3940 Generating benchmark report at /Volumes/Data/src/webkit/Baseline_FTLTailCall_SunSpiderLongSpiderV8SpiderOctaneKrakenJSRegressAsmBenchCompressionBench_msaboff-pro_20150924_1542_report.txt And raw data at /Volumes/Data/src/webkit/Baseline_FTLTailCall_SunSpiderLongSpiderV8SpiderOctaneKrakenJSRegressAsmBenchCompressionBench_msaboff-pro_20150924_1542.json Benchmark report for SunSpider, LongSpider, V8Spider, Octane, Kraken, JSRegress, AsmBench, and CompressionBench on msaboff-pro (MacPro5,1). VMs tested: "Baseline" at /Volumes/Data/src/webkit.baseline/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/Resources/jsc "FTLTailCall" at /Volumes/Data/src/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/Resources/jsc Collected 4 samples per benchmark/VM, with 4 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. Baseline FTLTailCall SunSpider: 3d-cube 7.9792+-0.3960 7.9030+-0.5182 3d-morph 8.1843+-0.3378 8.0872+-0.1859 might be 1.0120x faster 3d-raytrace 8.9017+-0.2968 8.8450+-0.2756 access-binary-trees 3.3732+-0.2480 3.3213+-0.2054 might be 1.0156x faster access-fannkuch 8.7303+-0.4338 8.7216+-0.2674 access-nbody 4.3638+-0.1992 ? 4.4130+-0.1117 ? might be 1.0113x slower access-nsieve 4.5186+-0.1981 ? 4.5796+-0.1514 ? might be 1.0135x slower bitops-3bit-bits-in-byte 1.7733+-0.0846 ? 1.7955+-0.1632 ? might be 1.0125x slower bitops-bits-in-byte 5.5793+-0.0904 ? 5.6617+-0.1095 ? might be 1.0148x slower bitops-bitwise-and 2.8330+-0.1592 ? 2.8389+-0.2845 ? bitops-nsieve-bits 4.3277+-0.1660 ? 4.3874+-0.1611 ? might be 1.0138x slower controlflow-recursive 3.5425+-0.0602 3.4766+-0.1143 might be 1.0190x faster crypto-aes 6.3738+-0.2913 ? 6.4257+-0.1987 ? crypto-md5 3.9291+-0.1659 ? 4.0664+-0.1865 ? might be 1.0350x slower crypto-sha1 3.4300+-0.0462 ? 3.4395+-0.1766 ? date-format-tofte 12.8163+-0.6279 12.6020+-0.8477 might be 1.0170x faster date-format-xparb 7.6727+-0.2657 7.4630+-0.1711 might be 1.0281x faster math-cordic 4.3720+-0.1547 4.2963+-0.1442 might be 1.0176x faster math-partial-sums 9.8143+-0.2748 9.7425+-0.1166 math-spectral-norm 3.0869+-0.1398 ? 3.0949+-0.1097 ? regexp-dna 10.1293+-0.5095 ? 10.2421+-0.6308 ? might be 1.0111x slower string-base64 6.7480+-0.5537 6.6589+-0.0748 might be 1.0134x faster string-fasta 9.1501+-0.1671 9.1280+-0.1924 string-tagcloud 12.8978+-0.3869 12.7969+-0.2681 string-unpack-code 26.4536+-0.6404 ? 26.7227+-0.7055 ? might be 1.0102x slower string-validate-input 6.9626+-0.2053 ? 7.1074+-0.4688 ? might be 1.0208x slower <arithmetic> 7.2286+-0.0433 7.2237+-0.0491 might be 1.0007x faster Baseline FTLTailCall LongSpider: 3d-cube 1153.3079+-18.6644 ? 1163.3223+-20.4309 ? 3d-morph 1901.7108+-26.1352 1893.9627+-8.5184 3d-raytrace 991.5331+-9.2850 990.9625+-5.5981 access-binary-trees 1374.4435+-2.2196 ? 1380.4895+-8.1406 ? access-fannkuch 455.7527+-4.8470 ? 461.2219+-11.3162 ? might be 1.0120x slower access-nbody 1021.2827+-27.8837 1010.2141+-4.2885 might be 1.0110x faster access-nsieve 683.3531+-16.0561 674.7672+-9.2971 might be 1.0127x faster bitops-3bit-bits-in-byte 44.7759+-1.1735 ? 44.8318+-0.2471 ? bitops-bits-in-byte 343.4109+-5.1462 ? 345.6949+-4.3722 ? bitops-nsieve-bits 619.5676+-1.4247 ? 627.8960+-27.1643 ? might be 1.0134x slower controlflow-recursive 752.4019+-23.2001 745.3698+-2.2247 crypto-aes 889.0048+-8.2046 ? 900.2663+-6.4874 ? might be 1.0127x slower crypto-md5 789.5475+-12.8263 ? 794.0745+-12.4994 ? crypto-sha1 1070.9747+-17.8856 1062.4113+-8.2733 date-format-tofte 991.0571+-34.2796 967.0193+-33.7797 might be 1.0249x faster date-format-xparb 1062.8716+-10.4773 1045.2930+-32.8620 might be 1.0168x faster hash-map 231.8835+-2.3581 231.3430+-3.0570 math-cordic 642.5349+-7.2891 ? 648.5532+-12.7299 ? math-partial-sums 1138.5790+-5.8434 ? 1140.9069+-11.5044 ? math-spectral-norm 1075.9895+-6.5989 1072.6901+-10.5186 string-base64 532.2181+-2.3690 ? 543.5682+-18.9630 ? might be 1.0213x slower string-fasta 583.0449+-1.3105 ? 586.9727+-20.9157 ? string-tagcloud 285.8955+-3.7030 ? 286.7098+-4.5746 ? <geometric> 666.0745+-1.1628 ? 666.4751+-1.6011 ? might be 1.0006x slower Baseline FTLTailCall V8Spider: crypto 70.7248+-1.4062 ? 71.7533+-1.0392 ? might be 1.0145x slower deltablue 88.5544+-3.5528 86.6682+-2.9355 might be 1.0218x faster earley-boyer 65.8374+-2.0879 64.9132+-0.9326 might be 1.0142x faster raytrace 41.0757+-3.6438 39.6375+-0.8211 might be 1.0363x faster regexp 103.8710+-1.9320 ? 104.4360+-3.1611 ? richards 77.5117+-2.7887 76.2626+-0.7336 might be 1.0164x faster splay 53.2029+-2.3600 52.7885+-0.6731 <geometric> 68.7266+-1.2562 68.0019+-0.2576 might be 1.0107x faster Baseline FTLTailCall Octane: encrypt 0.30090+-0.00589 ? 0.30240+-0.00363 ? decrypt 5.64773+-0.02163 ? 5.67141+-0.11087 ? deltablue x2 0.23364+-0.01160 0.22964+-0.00423 might be 1.0174x faster earley 0.52974+-0.01149 ? 0.53146+-0.00558 ? boyer 8.91079+-0.19548 8.88555+-0.05988 navier-stokes x2 6.41802+-0.08549 ? 6.44301+-0.12366 ? raytrace x2 1.55703+-0.04475 1.55108+-0.07685 richards x2 0.15414+-0.00381 0.15272+-0.00155 splay x2 0.53648+-0.00032 ^ 0.53351+-0.00237 ^ definitely 1.0056x faster regexp x2 38.71862+-0.73486 ? 39.43810+-1.20940 ? might be 1.0186x slower pdfjs x2 60.97598+-0.72315 60.48355+-0.24387 mandreel x2 68.64978+-0.73693 68.45893+-1.79874 gbemu x2 58.75793+-2.36535 ? 59.78192+-6.56690 ? might be 1.0174x slower closure 0.94955+-0.02963 0.93248+-0.00883 might be 1.0183x faster jquery 12.27260+-0.12351 12.13883+-0.10089 might be 1.0110x faster box2d x2 16.60395+-0.16649 16.51912+-0.23395 zlib x2 566.52854+-43.81670 ? 576.13479+-5.54413 ? might be 1.0170x slower typescript x2 1111.06866+-23.95040 1103.00403+-6.05634 <geometric> 8.93742+-0.07228 8.92973+-0.09585 might be 1.0009x faster Baseline FTLTailCall Kraken: ai-astar 198.740+-2.625 197.021+-2.409 audio-beat-detection 78.512+-1.141 ? 79.105+-1.822 ? audio-dft 129.321+-2.470 ? 131.041+-4.485 ? might be 1.0133x slower audio-fft 59.147+-1.003 58.518+-0.192 might be 1.0107x faster audio-oscillator 98.501+-0.921 ? 98.839+-0.647 ? imaging-darkroom 97.097+-0.739 ? 98.013+-2.011 ? imaging-desaturate 89.269+-1.492 89.145+-0.933 imaging-gaussian-blur 147.482+-3.753 145.544+-2.407 might be 1.0133x faster json-parse-financial 67.207+-1.053 66.562+-0.732 json-stringify-tinderbox 41.031+-0.375 ? 41.186+-0.289 ? stanford-crypto-aes 64.983+-2.651 64.913+-1.683 stanford-crypto-ccm 57.850+-1.990 ? 59.626+-1.643 ? might be 1.0307x slower stanford-crypto-pbkdf2 146.216+-5.438 144.537+-1.084 might be 1.0116x faster stanford-crypto-sha256-iterative 57.432+-0.913 57.009+-0.739 <arithmetic> 95.199+-0.580 95.076+-0.276 might be 1.0013x faster Baseline FTLTailCall JSRegress: abc-forward-loop-equal 56.1079+-2.0238 55.3519+-0.9890 might be 1.0137x faster abc-postfix-backward-loop 54.8818+-0.6272 54.5860+-0.3172 abc-simple-backward-loop 55.8820+-1.8755 54.7155+-0.3558 might be 1.0213x faster abc-simple-forward-loop 54.5515+-0.5771 ? 55.2635+-1.7936 ? might be 1.0131x slower abc-skippy-loop 38.0599+-0.7643 37.5444+-0.1659 might be 1.0137x faster abs-boolean 3.8250+-0.1728 3.7800+-0.0946 might be 1.0119x faster adapt-to-double-divide 17.4385+-0.8104 ? 17.4789+-0.2782 ? aliased-arguments-getbyval 1.5881+-0.1449 ? 1.6648+-0.2171 ? might be 1.0483x slower allocate-big-object 3.8117+-0.3979 3.7202+-0.3371 might be 1.0246x faster arguments-named-and-reflective 14.7466+-0.2621 14.3640+-0.1372 might be 1.0266x faster arguments-out-of-bounds 14.4697+-0.6622 ? 14.5793+-0.7407 ? arguments-strict-mode 12.3905+-0.6816 ? 12.5939+-0.9702 ? might be 1.0164x slower arguments 11.1553+-0.1382 11.1257+-0.4649 arity-mismatch-inlining 1.2812+-0.1014 ? 1.3132+-0.0886 ? might be 1.0250x slower array-access-polymorphic-structure 11.3450+-0.3581 11.3032+-0.4938 array-nonarray-polymorhpic-access 38.2127+-1.6015 ? 38.3690+-2.1178 ? array-prototype-every 119.5709+-2.9514 ? 123.8366+-3.3707 ? might be 1.0357x slower array-prototype-forEach 118.1006+-3.0104 ? 120.0157+-0.8872 ? might be 1.0162x slower array-prototype-map 141.5541+-16.4492 130.5815+-3.7306 might be 1.0840x faster array-prototype-reduce 113.5812+-4.0231 ? 115.0142+-1.7671 ? might be 1.0126x slower array-prototype-reduceRight 113.2582+-2.4726 ? 115.6287+-1.9895 ? might be 1.0209x slower array-prototype-some 121.6501+-1.8487 ? 123.0714+-3.4648 ? might be 1.0117x slower array-splice-contiguous 32.9707+-0.6041 32.7333+-0.5835 array-with-double-add 5.7347+-0.2265 5.6733+-0.1101 might be 1.0108x faster array-with-double-increment 4.2075+-0.1760 4.1696+-0.1208 array-with-double-mul-add 7.2661+-0.1205 7.2405+-0.1542 array-with-double-sum 4.3787+-0.1376 ? 4.4370+-0.1408 ? might be 1.0133x slower array-with-int32-add-sub 9.4976+-0.3640 9.4887+-0.3462 array-with-int32-or-double-sum 4.5926+-0.3008 ? 4.6045+-0.2457 ? ArrayBuffer-DataView-alloc-large-long-lived 46.1448+-1.6808 46.0717+-0.9285 ArrayBuffer-DataView-alloc-long-lived 18.2743+-0.4495 ? 18.2822+-0.4714 ? ArrayBuffer-Int32Array-byteOffset 5.5942+-0.2213 5.3975+-0.1357 might be 1.0365x faster ArrayBuffer-Int8Array-alloc-large-long-lived 46.3503+-0.8594 ? 47.2176+-0.8937 ? might be 1.0187x slower ArrayBuffer-Int8Array-alloc-long-lived-buffer 31.0935+-0.7923 ^ 29.6496+-0.3658 ^ definitely 1.0487x faster ArrayBuffer-Int8Array-alloc-long-lived 17.6442+-1.1007 17.3124+-0.7952 might be 1.0192x faster ArrayBuffer-Int8Array-alloc 14.5004+-0.6442 14.4240+-0.2454 arrowfunction-call 14.9610+-0.1032 ? 15.0068+-0.2972 ? asmjs_bool_bug 9.7924+-0.3397 9.4665+-0.4584 might be 1.0344x faster assign-custom-setter-polymorphic 4.6380+-0.1238 4.4985+-0.0717 might be 1.0310x faster assign-custom-setter 6.0778+-0.1613 5.9904+-0.2324 might be 1.0146x faster basic-set 11.4849+-0.8086 11.2978+-0.4473 might be 1.0166x faster big-int-mul 5.9150+-0.1163 ? 5.9738+-0.0736 ? boolean-test 4.5935+-0.2903 4.4417+-0.0542 might be 1.0342x faster branch-fold 4.8069+-0.1187 4.7440+-0.1256 might be 1.0133x faster branch-on-string-as-boolean 22.4595+-1.5856 ? 22.6550+-0.7806 ? by-val-generic 3.7142+-0.1749 ? 3.9424+-0.1296 ? might be 1.0614x slower call-spread-apply 40.8485+-2.3197 38.8124+-1.0474 might be 1.0525x faster call-spread-call 31.4403+-0.2574 30.6766+-0.7199 might be 1.0249x faster captured-assignments 0.8015+-0.1713 0.7890+-0.1276 might be 1.0158x faster cast-int-to-double 8.5768+-0.1040 ? 8.6008+-0.0783 ? cell-argument 7.3845+-0.2947 ? 7.4160+-0.4698 ? cfg-simplify 3.8511+-0.2025 ? 3.9024+-0.1489 ? might be 1.0133x slower chain-getter-access 10.4308+-0.1752 ? 10.4772+-0.2975 ? cmpeq-obj-to-obj-other 15.2235+-1.1702 15.1502+-0.2910 constant-test 8.1270+-0.0875 8.0787+-0.1399 create-lots-of-functions 16.4334+-0.1096 ? 16.6403+-0.4923 ? might be 1.0126x slower cse-new-array-buffer 3.3898+-0.2044 3.3794+-0.2678 cse-new-array 3.5527+-0.2860 3.5415+-0.2181 DataView-custom-properties 53.4545+-1.1086 ? 53.9829+-3.2101 ? delay-tear-off-arguments-strictmode 18.8756+-0.2538 18.6810+-0.5141 might be 1.0104x faster deltablue-varargs 287.4162+-13.0160 286.5977+-11.4086 destructuring-arguments 244.2088+-13.8651 ? 245.3911+-2.1662 ? destructuring-parameters-overridden-by-function 0.7581+-0.1274 ? 0.7960+-0.1641 ? might be 1.0500x slower destructuring-swap 7.9628+-0.1985 7.8906+-0.0727 direct-arguments-getbyval 1.6536+-0.3289 1.6393+-0.1957 div-boolean-double 5.6390+-0.0090 5.5994+-0.0738 div-boolean 10.0390+-0.1484 10.0269+-0.1646 double-get-by-val-out-of-bounds 6.1074+-0.1588 ? 6.4080+-0.6187 ? might be 1.0492x slower double-pollution-getbyval 9.8387+-0.1018 ? 9.9341+-0.0857 ? double-pollution-putbyoffset 5.6676+-0.1815 5.4958+-0.2499 might be 1.0313x faster double-real-use 39.3749+-0.2265 39.3669+-0.3931 double-to-int32-typed-array-no-inline 3.2102+-0.1990 ? 3.2733+-0.1622 ? might be 1.0196x slower double-to-int32-typed-array 3.0036+-0.2544 2.9097+-0.0850 might be 1.0323x faster double-to-uint32-typed-array-no-inline 3.1236+-0.1218 ? 3.2539+-0.2015 ? might be 1.0417x slower double-to-uint32-typed-array 2.9881+-0.0588 ? 3.0050+-0.1467 ? elidable-new-object-dag 56.0861+-1.9409 54.6929+-0.6695 might be 1.0255x faster elidable-new-object-roflcopter 53.6485+-0.5427 ? 53.9496+-1.8775 ? elidable-new-object-then-call 49.6780+-1.2513 ? 50.2726+-1.1090 ? might be 1.0120x slower elidable-new-object-tree 64.2993+-2.2158 ? 64.9947+-0.9152 ? might be 1.0108x slower empty-string-plus-int 7.5973+-0.2775 7.5781+-0.1180 emscripten-cube2hash 45.5381+-0.4457 45.2473+-0.1809 exit-length-on-plain-object 22.7953+-1.6044 22.7063+-0.7591 external-arguments-getbyval 1.7989+-0.2427 ? 1.8281+-0.1810 ? might be 1.0163x slower external-arguments-putbyval 3.2172+-0.2089 ? 3.2654+-0.1826 ? might be 1.0150x slower fixed-typed-array-storage-var-index 1.6917+-0.1035 ? 1.7012+-0.1908 ? fixed-typed-array-storage 1.3140+-0.1162 ? 1.3848+-0.1272 ? might be 1.0539x slower Float32Array-matrix-mult 6.4377+-0.2589 6.3139+-0.2209 might be 1.0196x faster Float32Array-to-Float64Array-set 77.5938+-1.6882 ? 78.4612+-1.2402 ? might be 1.0112x slower Float64Array-alloc-long-lived 93.5413+-0.6554 ? 94.0788+-1.0496 ? Float64Array-to-Int16Array-set 91.5964+-0.7516 ? 92.9632+-2.5438 ? might be 1.0149x slower fold-double-to-int 19.0319+-0.0574 ? 19.1622+-0.1135 ? fold-get-by-id-to-multi-get-by-offset-rare-int 12.5089+-0.2640 ? 12.5880+-0.4629 ? fold-get-by-id-to-multi-get-by-offset 10.7925+-0.5102 10.5137+-0.1873 might be 1.0265x faster fold-multi-get-by-offset-to-get-by-offset 9.2238+-1.0817 8.9297+-0.7670 might be 1.0329x faster fold-multi-get-by-offset-to-poly-get-by-offset 9.7716+-0.6867 ? 10.0508+-0.0956 ? might be 1.0286x slower fold-multi-put-by-offset-to-poly-put-by-offset 11.3400+-0.0687 ? 11.4734+-0.0748 ? might be 1.0118x slower fold-multi-put-by-offset-to-put-by-offset 10.6783+-0.7598 10.5313+-0.7659 might be 1.0140x faster fold-multi-put-by-offset-to-replace-or-transition-put-by-offset 16.1390+-0.3576 15.7775+-0.7569 might be 1.0229x faster fold-put-by-id-to-multi-put-by-offset 12.9133+-0.9014 12.8920+-1.1119 fold-put-by-val-with-string-to-multi-put-by-offset 12.8086+-0.9931 ? 13.1598+-0.8232 ? might be 1.0274x slower fold-put-by-val-with-symbol-to-multi-put-by-offset 12.8102+-1.1397 12.3907+-0.2123 might be 1.0339x faster fold-put-structure 8.7095+-0.1331 ? 8.7428+-0.0747 ? for-of-iterate-array-entries 16.2662+-0.8943 16.1808+-0.7769 for-of-iterate-array-keys 5.1653+-0.2126 ? 5.2953+-0.4148 ? might be 1.0252x slower for-of-iterate-array-values 5.1898+-0.4913 5.1837+-0.3238 fround 19.4658+-0.4991 19.3803+-0.6576 ftl-library-inlining-dataview 93.5699+-0.6435 ! 99.9172+-2.0479 ! definitely 1.0678x slower ftl-library-inlining 132.9858+-20.9047 ? 136.4564+-15.4222 ? might be 1.0261x slower function-call 15.0975+-0.0684 ^ 14.6705+-0.2955 ^ definitely 1.0291x faster function-dot-apply 3.2520+-0.1171 ^ 3.0933+-0.0365 ^ definitely 1.0513x faster function-test 4.5065+-0.0936 4.4127+-0.1183 might be 1.0213x faster function-with-eval 148.3520+-1.1957 148.3283+-3.3879 gcse-poly-get-less-obvious 30.1830+-4.5853 ? 30.3105+-3.3762 ? gcse-poly-get 33.6250+-1.2514 33.3990+-1.7991 gcse 7.6112+-0.0673 ^ 6.7647+-0.0831 ^ definitely 1.1251x faster get-by-id-bimorphic-check-structure-elimination-simple 3.3865+-0.1056 3.3036+-0.1764 might be 1.0251x faster get-by-id-bimorphic-check-structure-elimination 8.1777+-0.1412 ? 8.1890+-0.1692 ? get-by-id-chain-from-try-block 3.5455+-0.1708 3.5003+-0.2465 might be 1.0129x faster get-by-id-check-structure-elimination 7.7162+-0.1533 ? 7.7258+-0.0793 ? get-by-id-proto-or-self 20.8983+-3.3721 ? 20.9605+-2.9853 ? get-by-id-quadmorphic-check-structure-elimination-simple 4.2279+-0.1097 4.0405+-0.0898 might be 1.0464x faster get-by-id-self-or-proto 21.4673+-2.3679 19.8605+-0.9187 might be 1.0809x faster get-by-val-out-of-bounds 6.0390+-0.1656 ? 6.2372+-0.1322 ? might be 1.0328x slower get-by-val-with-string-bimorphic-check-structure-elimination-simple 3.8754+-0.0549 ? 3.9128+-0.1071 ? get-by-val-with-string-bimorphic-check-structure-elimination 10.0098+-0.2855 ? 10.1169+-0.0685 ? might be 1.0107x slower get-by-val-with-string-chain-from-try-block 3.6303+-0.2521 3.6014+-0.2136 get-by-val-with-string-check-structure-elimination 9.1703+-0.0429 ? 9.1931+-0.2579 ? get-by-val-with-string-proto-or-self 21.5203+-2.9297 ? 22.5953+-3.4416 ? might be 1.0500x slower get-by-val-with-string-quadmorphic-check-structure-elimination-simple 5.0241+-0.1166 4.9762+-0.1064 get-by-val-with-string-self-or-proto 22.6219+-3.6611 22.4606+-3.1689 get-by-val-with-symbol-bimorphic-check-structure-elimination-simple 4.6028+-0.1902 ? 4.6266+-0.1620 ? get-by-val-with-symbol-bimorphic-check-structure-elimination 19.4675+-0.3440 19.2994+-0.4242 get-by-val-with-symbol-chain-from-try-block 3.5770+-0.0873 ? 3.6016+-0.2328 ? get-by-val-with-symbol-check-structure-elimination 18.2565+-0.5452 ? 18.5060+-0.3592 ? might be 1.0137x slower get-by-val-with-symbol-proto-or-self 23.3569+-2.5780 20.7347+-0.6088 might be 1.1265x faster get-by-val-with-symbol-quadmorphic-check-structure-elimination-simple 6.0485+-0.1463 6.0469+-0.0937 get-by-val-with-symbol-self-or-proto 21.5950+-2.6428 ? 22.2852+-4.0537 ? might be 1.0320x slower get_callee_monomorphic 3.7780+-0.1770 3.7578+-0.3154 get_callee_polymorphic 5.0004+-0.1409 4.8792+-0.2847 might be 1.0248x faster getter-no-activation 5.9208+-0.1053 5.9161+-0.1117 getter-prototype 11.1676+-0.4595 ? 11.2338+-0.4775 ? getter-richards 128.0605+-5.6354 125.5574+-12.8744 might be 1.0199x faster getter 7.9800+-0.0942 ^ 7.3513+-0.2324 ^ definitely 1.0855x faster global-object-access-with-mutating-structure 7.6500+-0.0946 7.5335+-0.1641 might be 1.0155x faster global-var-const-infer-fire-from-opt 1.1740+-0.2492 ? 1.1842+-0.1683 ? global-var-const-infer 1.0084+-0.1572 ? 1.1443+-0.1670 ? might be 1.1347x slower hard-overflow-check-equal 44.8525+-0.9454 ? 44.9805+-1.9131 ? hard-overflow-check 44.4554+-0.3787 ? 44.7370+-0.5934 ? HashMap-put-get-iterate-keys 33.8235+-0.9135 ? 34.0250+-1.1932 ? HashMap-put-get-iterate 34.0887+-0.7274 33.9380+-0.8909 HashMap-string-put-get-iterate 36.9832+-3.6363 35.5679+-1.1296 might be 1.0398x faster hoist-make-rope 12.7125+-1.4558 ? 12.9760+-1.7734 ? might be 1.0207x slower hoist-poly-check-structure-effectful-loop 6.6788+-0.0916 ? 6.7131+-0.1997 ? hoist-poly-check-structure 4.4827+-0.1005 4.4706+-0.0856 imul-double-only 8.6847+-0.4372 ? 8.8731+-1.3619 ? might be 1.0217x slower imul-int-only 10.8917+-0.2596 10.7063+-0.2688 might be 1.0173x faster imul-mixed 8.4587+-1.1011 ? 8.6865+-1.0281 ? might be 1.0269x slower in-four-cases 25.8458+-0.7387 25.8093+-0.8041 in-one-case-false 14.8284+-0.2529 14.8161+-0.0724 in-one-case-true 14.7388+-0.0650 ? 14.9081+-0.2432 ? might be 1.0115x slower in-two-cases 15.1138+-0.1590 14.9469+-0.1740 might be 1.0112x faster indexed-properties-in-objects 4.2024+-0.0998 ^ 3.8806+-0.1272 ^ definitely 1.0829x faster infer-closure-const-then-mov-no-inline 4.8937+-0.2048 ? 4.9107+-0.1417 ? infer-closure-const-then-mov 21.4066+-1.1340 21.0269+-0.7422 might be 1.0181x faster infer-closure-const-then-put-to-scope-no-inline 15.7961+-0.3555 ! 17.0670+-0.5402 ! definitely 1.0805x slower infer-closure-const-then-put-to-scope 27.7354+-0.8894 ! 32.4135+-0.3610 ! definitely 1.1687x slower infer-closure-const-then-reenter-no-inline 70.9622+-0.6659 ! 74.3788+-0.3754 ! definitely 1.0481x slower infer-closure-const-then-reenter 33.1869+-1.1217 33.1837+-0.6130 infer-constant-global-property 4.8211+-0.0223 4.7550+-0.0996 might be 1.0139x faster infer-constant-property 3.4120+-0.1338 ? 3.4589+-0.0905 ? might be 1.0138x slower infer-one-time-closure-ten-vars 11.2770+-0.5883 ? 11.5590+-0.2116 ? might be 1.0250x slower infer-one-time-closure-two-vars 10.7819+-0.4222 ? 10.8403+-0.1283 ? infer-one-time-closure 10.6577+-0.4531 10.5937+-0.3642 infer-one-time-deep-closure 17.8967+-0.8140 ? 18.0213+-0.1585 ? inline-arguments-access 6.1150+-0.3242 6.0554+-0.2238 inline-arguments-aliased-access 6.2040+-0.2420 6.1586+-0.1301 inline-arguments-local-escape 6.2360+-0.0556 6.1161+-0.1635 might be 1.0196x faster inline-get-scoped-var 5.7583+-0.0938 ? 5.8250+-0.0463 ? might be 1.0116x slower inlined-put-by-id-transition 15.7344+-0.5429 15.4290+-0.3129 might be 1.0198x faster inlined-put-by-val-with-string-transition 67.8935+-2.0964 66.9481+-1.1203 might be 1.0141x faster inlined-put-by-val-with-symbol-transition 68.5538+-2.8800 67.9240+-1.2082 int-or-other-abs-then-get-by-val 6.5981+-0.2488 ? 6.6240+-0.0639 ? int-or-other-abs-zero-then-get-by-val 28.1147+-0.6954 27.3970+-0.3707 might be 1.0262x faster int-or-other-add-then-get-by-val 6.1070+-0.1119 ? 6.1550+-0.1768 ? int-or-other-add 8.1768+-0.2148 ? 8.2601+-0.1192 ? might be 1.0102x slower int-or-other-div-then-get-by-val 5.0574+-0.1467 ? 5.0577+-0.1296 ? int-or-other-max-then-get-by-val 6.4609+-0.1676 6.1133+-0.5342 might be 1.0569x faster int-or-other-min-then-get-by-val 5.1910+-0.3035 5.1769+-0.1217 int-or-other-mod-then-get-by-val 4.9344+-0.0595 4.9273+-0.1220 int-or-other-mul-then-get-by-val 5.0533+-0.1255 ? 5.1467+-0.1990 ? might be 1.0185x slower int-or-other-neg-then-get-by-val 5.7080+-0.1326 ? 6.0906+-0.9210 ? might be 1.0670x slower int-or-other-neg-zero-then-get-by-val 27.6542+-0.2006 ? 28.0616+-0.2964 ? might be 1.0147x slower int-or-other-sub-then-get-by-val 6.0562+-0.1128 ? 6.1453+-0.1064 ? might be 1.0147x slower int-or-other-sub 5.3602+-0.0716 ? 5.3615+-0.0795 ? int-overflow-local 6.1800+-0.0713 6.1533+-0.1910 Int16Array-alloc-long-lived 65.2850+-0.7081 ? 65.9570+-1.0616 ? might be 1.0103x slower Int16Array-bubble-sort-with-byteLength 35.5035+-1.1122 ? 35.8108+-0.2979 ? Int16Array-bubble-sort 35.7055+-1.1577 ? 36.0655+-1.0111 ? might be 1.0101x slower Int16Array-load-int-mul 2.1409+-0.0882 2.0737+-0.1380 might be 1.0324x faster Int16Array-to-Int32Array-set 74.5519+-1.2694 73.0711+-1.5188 might be 1.0203x faster Int32Array-alloc-large 33.3762+-0.8468 32.3179+-0.5883 might be 1.0327x faster Int32Array-alloc-long-lived 74.4218+-1.3953 74.1349+-1.3517 Int32Array-alloc 4.7007+-0.2190 4.6031+-0.2056 might be 1.0212x faster Int32Array-Int8Array-view-alloc 9.3167+-0.2781 9.2792+-0.1682 int52-spill 7.2535+-0.2614 7.1418+-0.1124 might be 1.0156x faster Int8Array-alloc-long-lived 58.0889+-1.7560 ? 59.3250+-3.1403 ? might be 1.0213x slower Int8Array-load-with-byteLength 4.7575+-0.1077 ? 4.7910+-0.1788 ? Int8Array-load 4.8945+-0.2222 4.7897+-0.1775 might be 1.0219x faster integer-divide 14.0390+-0.1103 14.0131+-0.3927 integer-modulo 2.7477+-0.0945 2.7191+-0.1750 might be 1.0105x faster is-boolean-fold-tricky 5.6200+-0.1007 ? 5.6677+-0.1884 ? is-boolean-fold 3.9811+-0.0986 ? 4.0537+-0.1473 ? might be 1.0182x slower is-function-fold-tricky-internal-function 15.3417+-1.7957 14.8641+-0.2150 might be 1.0321x faster is-function-fold-tricky 5.8341+-0.0489 5.7852+-0.1549 is-function-fold 4.0696+-0.1521 4.0389+-0.1069 is-number-fold-tricky 5.6976+-0.1896 ? 5.7151+-0.1282 ? is-number-fold 4.0784+-0.1103 4.0176+-0.1272 might be 1.0151x faster is-object-or-null-fold-functions 4.2069+-0.0737 4.1028+-0.1065 might be 1.0254x faster is-object-or-null-fold-less-tricky 5.7341+-0.1237 ? 5.8157+-0.0629 ? might be 1.0142x slower is-object-or-null-fold-tricky 7.3820+-0.1532 ? 7.5287+-0.1895 ? might be 1.0199x slower is-object-or-null-fold 4.1586+-0.2867 4.0350+-0.1159 might be 1.0306x faster is-object-or-null-trickier-function 5.8661+-0.1883 5.8597+-0.1303 is-object-or-null-trickier-internal-function 15.6541+-0.9657 ? 15.7238+-0.1667 ? is-object-or-null-tricky-function 5.8820+-0.1252 ? 5.8980+-0.1244 ? is-object-or-null-tricky-internal-function 11.5880+-0.1293 11.5132+-0.1656 is-string-fold-tricky 5.6694+-0.1304 5.6433+-0.1075 is-string-fold 3.9922+-0.0870 ? 4.0190+-0.1312 ? is-undefined-fold-tricky 4.7663+-0.1354 ? 4.8107+-0.0939 ? is-undefined-fold 3.9630+-0.0785 ? 4.0605+-0.1977 ? might be 1.0246x slower JSONP-negative-0 0.4478+-0.0807 0.4293+-0.0948 might be 1.0429x faster large-int-captured 6.5096+-0.2530 ? 6.5200+-0.5736 ? large-int-neg 19.7649+-0.4612 ? 20.0004+-0.7356 ? might be 1.0119x slower large-int 17.6397+-0.1672 ? 17.6456+-0.1621 ? load-varargs-elimination 29.3098+-1.3961 ? 29.4713+-0.7212 ? logical-not-weird-types 5.1075+-0.1313 5.0070+-0.2540 might be 1.0201x faster logical-not 6.6058+-0.5652 6.4423+-0.3225 might be 1.0254x faster lots-of-fields 17.9940+-0.2587 ? 18.0244+-0.6866 ? make-indexed-storage 4.1447+-0.6869 ? 4.3683+-0.2348 ? might be 1.0539x slower make-rope-cse 6.3652+-0.2668 ? 6.5412+-0.2035 ? might be 1.0276x slower marsaglia-larger-ints 53.9771+-0.7136 ? 54.1827+-1.6095 ? marsaglia-osr-entry 26.4467+-0.5981 ? 26.6700+-0.6757 ? math-with-out-of-bounds-array-values 36.0089+-0.3902 ^ 33.9117+-0.8869 ^ definitely 1.0618x faster max-boolean 3.3587+-0.1713 3.3204+-0.1277 might be 1.0115x faster method-on-number 22.5718+-0.3544 ! 23.5757+-0.0968 ! definitely 1.0445x slower min-boolean 3.4186+-0.1114 3.3876+-0.1375 minus-boolean-double 4.2108+-0.0525 ? 4.2678+-0.1506 ? might be 1.0135x slower minus-boolean 3.4182+-0.0759 3.4051+-0.1026 misc-strict-eq 47.4189+-3.1595 46.5891+-0.7866 might be 1.0178x faster mod-boolean-double 11.8081+-0.1662 ? 11.9675+-0.4156 ? might be 1.0135x slower mod-boolean 9.0740+-0.3033 ? 9.1332+-0.1296 ? mul-boolean-double 4.8530+-0.0367 ! 4.9747+-0.0578 ! definitely 1.0251x slower mul-boolean 3.5893+-0.0901 ? 3.6499+-0.1425 ? might be 1.0169x slower neg-boolean 4.2935+-0.1108 ? 4.3110+-0.0877 ? negative-zero-divide 0.5772+-0.0968 ? 0.6281+-0.1177 ? might be 1.0881x slower negative-zero-modulo 0.5228+-0.0076 ? 0.5752+-0.1199 ? might be 1.1003x slower negative-zero-negate 0.5270+-0.0491 0.5269+-0.0949 nested-function-parsing 72.6717+-1.1864 ? 73.2660+-2.8106 ? new-array-buffer-dead 143.8330+-3.3165 ? 144.5037+-4.4408 ? new-array-buffer-push 9.9576+-0.6558 ? 10.0914+-0.2086 ? might be 1.0134x slower new-array-dead 18.4188+-0.7024 ? 18.6478+-0.6738 ? might be 1.0124x slower new-array-push 5.4870+-0.1924 ? 5.5934+-0.1874 ? might be 1.0194x slower no-inline-constructor 49.5439+-2.3933 49.3301+-0.8852 number-test 4.3897+-0.1455 ? 4.4055+-0.1001 ? object-closure-call 7.6103+-0.1844 ? 7.7611+-0.2203 ? might be 1.0198x slower object-get-own-property-symbols-on-large-array 5.1368+-0.4152 ? 5.3012+-0.1059 ? might be 1.0320x slower object-test 4.3110+-0.1324 4.2224+-0.1512 might be 1.0210x faster obvious-sink-pathology-taken 171.0161+-9.2398 169.6381+-9.9475 obvious-sink-pathology 162.1172+-13.8819 158.8401+-2.8638 might be 1.0206x faster obviously-elidable-new-object 44.4477+-1.3473 43.6290+-0.9261 might be 1.0188x faster plus-boolean-arith 3.3977+-0.0814 3.3969+-0.0564 plus-boolean-double 4.3062+-0.1092 ? 4.3135+-0.1116 ? plus-boolean 3.3080+-0.1275 3.3051+-0.1488 poly-chain-access-different-prototypes-simple 5.2510+-0.1351 ? 5.2705+-0.0377 ? poly-chain-access-different-prototypes 5.3908+-0.0366 5.3434+-0.1580 poly-chain-access-simpler 5.2597+-0.1188 ? 5.2658+-0.0995 ? poly-chain-access 5.1183+-0.0813 5.0793+-0.1360 poly-stricteq 81.1038+-2.9152 79.2272+-0.3466 might be 1.0237x faster polymorphic-array-call 1.9453+-0.3169 1.9337+-0.1789 polymorphic-get-by-id 5.0206+-0.3715 ? 5.0833+-0.3490 ? might be 1.0125x slower polymorphic-put-by-id 43.5688+-1.6434 41.5898+-1.3682 might be 1.0476x faster polymorphic-put-by-val-with-string 43.7271+-1.4155 43.4907+-0.7532 polymorphic-put-by-val-with-symbol 43.2488+-0.9160 43.1714+-0.8983 polymorphic-structure 25.3026+-0.3580 ? 25.3724+-0.7225 ? polyvariant-monomorphic-get-by-id 11.6013+-0.2095 ? 11.6252+-0.2222 ? proto-getter-access 10.4666+-0.3047 ? 10.5521+-0.1522 ? prototype-access-with-mutating-prototype 7.1492+-0.2884 ? 7.2142+-0.2717 ? put-by-id-replace-and-transition 12.7933+-0.1233 ? 12.9305+-0.4289 ? might be 1.0107x slower put-by-id-slightly-polymorphic 3.6184+-0.0687 ? 3.6496+-0.0787 ? put-by-id 18.3819+-0.3142 ? 18.6152+-0.2509 ? might be 1.0127x slower put-by-val-direct 0.5914+-0.0986 0.5450+-0.0193 might be 1.0852x faster put-by-val-large-index-blank-indexing-type 8.2003+-0.1768 ? 8.3987+-0.3672 ? might be 1.0242x slower put-by-val-machine-int 3.7003+-0.1212 ? 3.7275+-0.3588 ? put-by-val-with-string-replace-and-transition 19.2853+-0.8601 19.1003+-0.6969 put-by-val-with-string-slightly-polymorphic 4.8229+-0.1910 4.8038+-0.2678 put-by-val-with-string 19.5538+-0.3147 19.4990+-1.0591 put-by-val-with-symbol-replace-and-transition 20.7418+-0.4819 ? 21.1187+-0.1544 ? might be 1.0182x slower put-by-val-with-symbol-slightly-polymorphic 5.0228+-0.1633 ? 5.0521+-0.0731 ? put-by-val-with-symbol 19.1353+-0.7257 ? 19.3765+-1.3047 ? might be 1.0126x slower rare-osr-exit-on-local 16.5665+-0.0591 ? 16.7027+-0.3544 ? raytrace-with-empty-try-catch 9.0857+-0.1128 8.9972+-0.2870 raytrace-with-try-catch 16.2667+-0.5950 ? 16.3167+-0.3680 ? register-pressure-from-osr 25.3452+-0.7226 25.0065+-0.2039 might be 1.0135x faster repeat-multi-get-by-offset 28.2213+-1.1313 ? 28.8240+-0.2503 ? might be 1.0214x slower richards-empty-try-catch 123.5026+-3.4299 ? 128.5753+-3.8824 ? might be 1.0411x slower richards-try-catch 408.5924+-8.4474 405.1485+-7.8659 setter-prototype 11.4163+-0.5593 11.3247+-0.2554 setter 6.8278+-0.0657 ! 7.1150+-0.2085 ! definitely 1.0421x slower simple-activation-demo 33.8445+-0.9276 33.5181+-0.3692 simple-getter-access 14.3268+-0.3833 14.0475+-0.3152 might be 1.0199x faster simple-poly-call-nested 9.2784+-0.1034 ? 9.4417+-0.0817 ? might be 1.0176x slower simple-poly-call 1.9418+-0.1889 1.9374+-0.1046 sin-boolean 21.0912+-1.2114 ? 21.1145+-2.0203 ? singleton-scope 84.8734+-2.7347 ? 87.4733+-0.7323 ? might be 1.0306x slower sink-function 13.4752+-0.5140 ? 13.5058+-0.2381 ? sink-huge-activation 20.5024+-0.7718 ? 21.1139+-0.5292 ? might be 1.0298x slower sinkable-new-object-dag 83.8180+-2.6742 ? 89.7119+-6.5385 ? might be 1.0703x slower sinkable-new-object-taken 66.7482+-1.0161 ? 66.9510+-1.4509 ? sinkable-new-object 45.9813+-0.2317 ? 46.7982+-0.9802 ? might be 1.0178x slower slow-array-profile-convergence 3.8118+-0.0709 ? 3.9625+-0.2382 ? might be 1.0396x slower slow-convergence 3.8649+-0.2256 3.7678+-0.1030 might be 1.0258x faster slow-ternaries 33.3363+-1.1995 33.3230+-1.1725 sorting-benchmark 25.4230+-1.2080 ? 25.8743+-0.9213 ? might be 1.0178x slower sparse-conditional 1.7410+-0.0590 1.6705+-0.0686 might be 1.0422x faster splice-to-remove 19.5941+-0.1964 ? 19.6570+-0.7977 ? string-char-code-at 20.7964+-0.5131 ? 20.8229+-0.6571 ? string-concat-object 3.4554+-0.4172 3.3484+-0.2247 might be 1.0320x faster string-concat-pair-object 3.2863+-0.3384 3.1685+-0.1570 might be 1.0372x faster string-concat-pair-simple 17.1970+-0.2549 17.1310+-0.5919 string-concat-simple 17.3218+-0.2495 ? 17.6580+-0.3826 ? might be 1.0194x slower string-cons-repeat 11.2892+-0.2501 ? 11.6085+-0.6134 ? might be 1.0283x slower string-cons-tower 11.1109+-0.4314 11.0529+-0.8141 string-equality 22.8563+-0.5577 22.7903+-0.5692 string-get-by-val-big-char 10.9804+-0.2807 10.8962+-0.4150 string-get-by-val-out-of-bounds-insane 5.8965+-1.7405 5.0690+-0.1841 might be 1.1632x faster string-get-by-val-out-of-bounds 6.8870+-0.1482 ? 7.0023+-0.2305 ? might be 1.0167x slower string-get-by-val 4.9035+-0.0607 4.8630+-0.0543 string-hash 2.8685+-0.0856 2.8002+-0.1800 might be 1.0244x faster string-long-ident-equality 18.9660+-0.3869 18.8985+-0.5381 string-out-of-bounds 15.2198+-0.4117 ? 15.2742+-0.2462 ? string-repeat-arith 42.4420+-0.7784 ? 43.2211+-0.4118 ? might be 1.0184x slower string-sub 83.6598+-0.9450 ? 84.9185+-2.9205 ? might be 1.0150x slower string-test 4.4833+-0.1799 4.4041+-0.0885 might be 1.0180x faster string-var-equality 59.5074+-1.6351 ? 59.6920+-2.7466 ? structure-hoist-over-transitions 3.3961+-0.1244 ? 3.4680+-0.1639 ? might be 1.0212x slower substring-concat-weird 57.9296+-0.3837 57.2679+-0.7046 might be 1.0116x faster substring-concat 63.7455+-2.2029 62.7404+-0.6526 might be 1.0160x faster substring 69.9964+-1.3205 ? 70.5173+-3.1273 ? switch-char-constant 3.4128+-0.1496 ? 3.4382+-0.1330 ? switch-char 7.9395+-0.0959 ? 7.9933+-0.1241 ? switch-constant 13.8322+-2.6930 12.8125+-0.5405 might be 1.0796x faster switch-string-basic-big-var 31.1395+-0.5022 ? 31.7504+-0.9673 ? might be 1.0196x slower switch-string-basic-big 30.5966+-2.6535 28.8702+-2.5982 might be 1.0598x faster switch-string-basic-var 32.1591+-1.1458 31.7173+-1.0470 might be 1.0139x faster switch-string-basic 20.2922+-0.5237 ? 22.0007+-1.4344 ? might be 1.0842x slower switch-string-big-length-tower-var 27.6143+-1.3907 ? 28.0028+-0.8601 ? might be 1.0141x slower switch-string-length-tower-var 20.9316+-0.7926 ? 21.2938+-0.8673 ? might be 1.0173x slower switch-string-length-tower 15.0159+-0.2165 ? 15.4891+-0.3251 ? might be 1.0315x slower switch-string-short 15.0556+-0.3663 ? 15.4705+-0.4013 ? might be 1.0276x slower switch 18.6821+-2.2473 ? 19.0468+-3.6711 ? might be 1.0195x slower tear-off-arguments-simple 4.4592+-0.3902 ? 4.4793+-0.2930 ? tear-off-arguments 6.4133+-0.3101 ? 6.4637+-0.5340 ? temporal-structure 16.6542+-0.2854 ? 16.6702+-0.1786 ? to-int32-boolean 21.2107+-0.6007 ? 21.2349+-0.1941 ? try-catch-get-by-val-cloned-arguments 14.5635+-0.3829 ? 14.6710+-0.2166 ? try-catch-get-by-val-direct-arguments 3.1721+-0.2412 ? 3.2209+-0.1111 ? might be 1.0154x slower try-catch-get-by-val-scoped-arguments 7.2185+-0.2494 ? 7.3502+-0.1872 ? might be 1.0182x slower typed-array-get-set-by-val-profiling 32.6567+-0.5778 ? 33.0248+-1.7292 ? might be 1.0113x slower undefined-property-access 454.0237+-2.8673 ? 457.4219+-11.9366 ? undefined-test 4.6183+-0.0941 4.5880+-0.1480 unprofiled-licm 15.7719+-0.2770 15.2503+-0.5003 might be 1.0342x faster v8-raytrace-with-empty-try-catch 86.3595+-1.3847 84.5534+-2.1997 might be 1.0214x faster v8-raytrace-with-try-catch 111.9131+-1.9967 ? 113.3912+-6.4468 ? might be 1.0132x slower varargs-call 18.3911+-0.3014 18.0943+-0.1232 might be 1.0164x faster varargs-construct-inline 35.4605+-0.7706 ? 36.1693+-1.2386 ? might be 1.0200x slower varargs-construct 29.8461+-0.4795 ? 30.1227+-1.0262 ? varargs-inline 12.3726+-0.0572 ? 12.6510+-0.3138 ? might be 1.0225x slower varargs-strict-mode 14.4158+-0.1046 ! 15.3515+-0.1917 ! definitely 1.0649x slower varargs 14.7092+-0.3661 ? 15.1565+-0.1614 ? might be 1.0304x slower weird-inlining-const-prop 3.1445+-0.1744 ? 3.1488+-0.1516 ? <geometric> 12.0266+-0.0266 ? 12.0331+-0.0216 ? might be 1.0005x slower Baseline FTLTailCall AsmBench: bigfib.cpp 686.6130+-12.6805 681.1686+-2.8260 cray.c 627.5635+-14.1646 ? 627.8507+-12.3962 ? dry.c 622.0730+-79.3959 ? 639.7935+-90.4039 ? might be 1.0285x slower FloatMM.c 923.3546+-6.2904 920.9418+-1.0889 gcc-loops.cpp 5999.5257+-39.6127 5991.2282+-54.0201 n-body.c 1675.0771+-5.3706 ? 1675.3594+-8.6330 ? Quicksort.c 574.2011+-1.9090 ? 577.0942+-16.3350 ? stepanov_container.cpp 4929.2533+-57.9747 4917.8504+-136.1726 Towers.c 403.0887+-5.7450 395.5480+-3.3673 might be 1.0191x faster <geometric> 1122.5891+-14.7933 1122.5798+-18.2758 might be 1.0000x faster Baseline FTLTailCall CompressionBench: huffman 81.4788+-1.2614 ? 81.7714+-1.0110 ? arithmetic-simple 436.5280+-5.5896 ? 437.3597+-3.1873 ? arithmetic-precise 365.8832+-10.6441 ? 371.6338+-8.8219 ? might be 1.0157x slower arithmetic-complex-precise 363.1974+-7.8005 ? 366.7683+-6.5026 ? arithmetic-precise-order-0 445.6658+-6.3451 ? 448.8375+-12.9706 ? arithmetic-precise-order-1 420.9778+-3.6185 ? 426.6824+-3.9093 ? might be 1.0136x slower arithmetic-precise-order-2 487.9990+-3.4694 ? 490.9768+-9.8150 ? arithmetic-simple-order-1 500.0128+-6.0787 ? 504.2504+-9.9207 ? arithmetic-simple-order-2 558.6084+-5.7195 ? 563.6854+-3.9748 ? lz-string 426.6593+-5.4276 ? 430.0168+-17.4548 ? <geometric> 372.5848+-1.4683 ? 375.6743+-2.5672 ? might be 1.0083x slower Baseline FTLTailCall Geomean of preferred means: <scaled-result> 78.3226+-0.1925 78.2832+-0.1550 might be 1.0005x faster

Attachment 261901 [details] did not pass style-queue: ERROR: Source/JavaScriptCore/jit/CallFrameShuffler.h:576: Place brace on its own line for function definitions. [whitespace/braces] [4] Total errors found: 1 in 39 files If any of these errors are false positives, please file a bug against check-webkit-style.

Comment on attachment 261901 [details] Rebased patch View in context: https://bugs.webkit.org/attachment.cgi?id=261901&action=review R=me with comments. > Source/JavaScriptCore/dfg/DFGNode.h:1133 > + bool isFunctionTerminal() > + { > + switch (op()) { > + case Return: > + case TailCall: > + case TailCallVarargs: > + case TailCallForwardVarargs: > + return true; > + default: > + return false; > + } > + } > + The way that I'm interpreting this function name is that it should return true for nodes that terminal the function, not just the block. Three things: 1) It's weird that Unreachable isn't here. Most compiler phases don't want to care about whether a piece of code is reachable. The point of Unreachable is that it's like a Return for those phases that don't want to care about reachability, but do want to care about whether a basic block has any further successors. A property of Unreachable that I'd like to preserve is that it should be possible to write a phase that replaces every Unreachable with Return(Undefined), and doing so should not cause any behavior change. In fact, Unreachable is like a Return(Undefined) that is preceded by the DFG IR equivalent of ASSERT_NOT_REACHED. So, if Unreachable isn't handled here, then we probably need to either change the function name or add a comment, since we're failing to obey the "like a Return" property of Unreachable. Luckily, it looks like the only user of this function would be OK with Unreachable returning true. It's fine for TierUpCheckInjectionPhase to insert a tier-up check before Unreachable, and we can safely trust that this will not affect performance on anything we care about, since Unreachable is usually used after some piece of code that the compiler will already prove to always exit, like a Throw or ForceOSRExit. So, if we insert a tier-up check before Unreachable, the compiler won't compile the tier-up check anyway. 2) If Unreachable is indeed a "function terminal", then this function could be written as "bool isFunctionTerminal() { return isTerminal() && !numSuccessors(); } 3) If we think that doing (1) and (2) is weird, then maybe the less weird approach would be to just delete this function, and have TierUpCheckInjectionPhase inline this switch. FWIW, that's probably how I would have done it. But, now that I see this isFunctionTerminal() function, I tend to think that it would be a generally useful function, provided that (1) it returns true for Unreachable since that's the less surprising behavior and (2) it's written in terms of isTerminal() and numSuccessors() since "a terminal that has no successors" is a very nice way of saying "a terminal that terminates the function". > Source/JavaScriptCore/ftl/FTLJSTailCall.cpp:43 > +static FTL::Location getRegisterWithAddend(const ExitValue& value, StackMaps::Record& record, StackMaps& stackmaps) I slightly prefer using anonymous namespaces over static, especially since you have multiple static methods. > Source/JavaScriptCore/ftl/FTLJSTailCall.cpp:58 > +static ValueRecovery recoveryFor(const ExitValue& value, StackMaps::Record& record, StackMaps& stackmaps) Ditto. > Source/JavaScriptCore/ftl/FTLJSTailCall.cpp:108 > +static uint32_t sizeFor(DataFormat format) Ditto. > Source/JavaScriptCore/jit/CallFrameShuffler.cpp:312 > + for (; firstRead < VirtualRegister { 0 }; firstRead += 1) { Is there a better way of saying VirtualRegister{0}? We don't usually use that syntax for VirtualRegister. Wouldn't it be better to say "firstRead <= virtualRegisterForLocal(0)"? > Source/JavaScriptCore/jit/CallFrameShuffler.h:411 > +#if USE(JSVALUE64) > + mutable RegisterSet m_lockedRegisters; > +#else > RegisterSet m_lockedRegisters; > +#endif Would be cleaner to just make it mutable unconditionally. > Source/JavaScriptCore/jit/Reg.h:197 > +template<typename T> struct HashTraits; > +template<> struct HashTraits<JSC::Reg> : SimpleClassHashTraits<JSC::Reg> { }; I found a bug! I believe that this needs "static const bool emptyValueIsZero = false;" like for example this traits: template<typename T> struct HashTraits; template<> struct HashTraits<JSC::DFG::PromotedLocationDescriptor> : SimpleClassHashTraits<JSC::DFG::PromotedLocationDescriptor> { static const bool emptyValueIsZero = false; }; The reason is that the empty Reg (i.e. "Reg()") will have the value 0xff (see Reg::invalid()), which is not zero.

(In reply to comment #6) > Comment on attachment 261901 [details] > Rebased patch > > View in context: > https://bugs.webkit.org/attachment.cgi?id=261901&action=review > > R=me with comments. > > > Source/JavaScriptCore/dfg/DFGNode.h:1133 > > + bool isFunctionTerminal() > > + { > > + switch (op()) { > > + case Return: > > + case TailCall: > > + case TailCallVarargs: > > + case TailCallForwardVarargs: > > + return true; > > + default: > > + return false; > > + } > > + } > > + > > The way that I'm interpreting this function name is that it should return > true for nodes that terminal the function, not just the block. > > Three things: > > 1) It's weird that Unreachable isn't here. Most compiler phases don't want > to care about whether a piece of code is reachable. The point of > Unreachable is that it's like a Return for those phases that don't want to > care about reachability, but do want to care about whether a basic block has > any further successors. A property of Unreachable that I'd like to preserve > is that it should be possible to write a phase that replaces every > Unreachable with Return(Undefined), and doing so should not cause any > behavior change. In fact, Unreachable is like a Return(Undefined) that is > preceded by the DFG IR equivalent of ASSERT_NOT_REACHED. So, if Unreachable > isn't handled here, then we probably need to either change the function name > or add a comment, since we're failing to obey the "like a Return" property > of Unreachable. Luckily, it looks like the only user of this function would > be OK with Unreachable returning true. It's fine for > TierUpCheckInjectionPhase to insert a tier-up check before Unreachable, and > we can safely trust that this will not affect performance on anything we > care about, since Unreachable is usually used after some piece of code that > the compiler will already prove to always exit, like a Throw or > ForceOSRExit. So, if we insert a tier-up check before Unreachable, the > compiler won't compile the tier-up check anyway. > > 2) If Unreachable is indeed a "function terminal", then this function could > be written as "bool isFunctionTerminal() { return isTerminal() && > !numSuccessors(); } > > 3) If we think that doing (1) and (2) is weird, then maybe the less weird > approach would be to just delete this function, and have > TierUpCheckInjectionPhase inline this switch. FWIW, that's probably how I > would have done it. But, now that I see this isFunctionTerminal() function, > I tend to think that it would be a generally useful function, provided that > (1) it returns true for Unreachable since that's the less surprising > behavior and (2) it's written in terms of isTerminal() and numSuccessors() > since "a terminal that has no successors" is a very nice way of saying "a > terminal that terminates the function". I changed isFunctionTerminal() to be written in terms of isTerminal() and numSuccessors(). I also had to fix the ThrowReferenceError case in DFGClobberize.cpp::clobberize() to satisfy the validation phase. > > Source/JavaScriptCore/ftl/FTLJSTailCall.cpp:43 > > +static FTL::Location getRegisterWithAddend(const ExitValue& value, StackMaps::Record& record, StackMaps& stackmaps) > > I slightly prefer using anonymous namespaces over static, especially since > you have multiple static methods. Done. > > Source/JavaScriptCore/ftl/FTLJSTailCall.cpp:58 > > +static ValueRecovery recoveryFor(const ExitValue& value, StackMaps::Record& record, StackMaps& stackmaps) > > Ditto. Done. > > Source/JavaScriptCore/ftl/FTLJSTailCall.cpp:108 > > +static uint32_t sizeFor(DataFormat format) > > Ditto. Done. > > Source/JavaScriptCore/jit/CallFrameShuffler.cpp:312 > > + for (; firstRead < VirtualRegister { 0 }; firstRead += 1) { > > Is there a better way of saying VirtualRegister{0}? We don't usually use > that syntax for VirtualRegister. Wouldn't it be better to say "firstRead <= > virtualRegisterForLocal(0)"? > > > Source/JavaScriptCore/jit/CallFrameShuffler.h:411 > > +#if USE(JSVALUE64) > > + mutable RegisterSet m_lockedRegisters; > > +#else > > RegisterSet m_lockedRegisters; > > +#endif > > Would be cleaner to just make it mutable unconditionally. Done. > > Source/JavaScriptCore/jit/Reg.h:197 > > +template<typename T> struct HashTraits; > > +template<> struct HashTraits<JSC::Reg> : SimpleClassHashTraits<JSC::Reg> { }; > > I found a bug! I believe that this needs "static const bool > emptyValueIsZero = false;" like for example this traits: > > template<typename T> struct HashTraits; > template<> struct HashTraits<JSC::DFG::PromotedLocationDescriptor> : > SimpleClassHashTraits<JSC::DFG::PromotedLocationDescriptor> { > static const bool emptyValueIsZero = false; > }; > > The reason is that the empty Reg (i.e. "Reg()") will have the value 0xff > (see Reg::invalid()), which is not zero. Done.

Created attachment 262024 [details] Patch for Landing

Committed r190289: <http://trac.webkit.org/changeset/190289>

(In reply to comment #9) > Committed r190289: <http://trac.webkit.org/changeset/190289> It caused two different regression: - bug149619 - bug149621

It looks like this change may have caused a ~4% progression on Speedometer.

(In reply to comment #11) > It looks like this change may have caused a ~4% progression on Speedometer. Are you also seeing the crashes that Ossy reports?

(In reply to comment #10) > (In reply to comment #9) > > Committed r190289: <http://trac.webkit.org/changeset/190289> > > It caused two different regression: > - bug149619 > - bug149621 I'm working on these.

(In reply to comment #12) > (In reply to comment #11) > > It looks like this change may have caused a ~4% progression on Speedometer. > > Are you also seeing the crashes that Ossy reports? One is ARM 32bit and I don't think we have coverage for this. This other one is OpenSource Speedometer which is indeed failing on the open source apple bots: https://build.webkit.org/builders/Apple%20Yosemite%20Release%20WK2%20%28Perf%29/builds/3026

Re-opened since this is blocked by bug 149647

This also caused a crash on regress/script-tests/call-spread-apply.js.ftl-no-cjit-no-inline-validate on Mac Debug, which happened every time on the bots.

(In reply to comment #14) > (In reply to comment #12) > > (In reply to comment #11) > > > It looks like this change may have caused a ~4% progression on Speedometer. > > > > Are you also seeing the crashes that Ossy reports? > > One is ARM 32bit and I don't think we have coverage for this. This other one > is OpenSource Speedometer which is indeed failing on the open source apple > bots: > https://build.webkit.org/builders/ > Apple%20Yosemite%20Release%20WK2%20%28Perf%29/builds/3026 The ARM32 problems showed up on our iOS testers.

Committed r190370: <http://trac.webkit.org/changeset/190370>

(In reply to comment #18) > Committed r190370: <http://trac.webkit.org/changeset/190370> bug149621 is still valid