161671 2016-09-06 20:34:00 -0700 [JSC] Use GetArrayLength for JSArray.length even when the array type is undecided 2016-09-12 15:15:46 -0700 1 1 1 Unclassified WebKit New Bugs WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED P2 Normal --- 1 benjamin benjamin commit-queue keith_miller mark.lam msaboff saam oldest_to_newest 1227033 0 benjamin 2016-09-06 20:34:00 -0700 [JSC] Use GetArrayLength for JSArray.length even when the array type is undecided 1227497 1 288232 benjamin 2016-09-07 20:12:57 -0700 Created attachment 288232 Patch 1227607 2 288232 ggaren 2016-09-08 09:24:46 -0700 Comment on attachment 288232 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=288232&action=review r=me > Source/JavaScriptCore/dfg/DFGArrayMode.cpp:203 > - if (node->op() == GetByVal > + if ((node->op() == GetByVal || canBecomeGetArrayLength(graph, node)) Looks like the comment above needs an update. ...The code above returns early if index is not int32. How can we get here if we're compiling "array.length"? 1228913 3 benjamin 2016-09-12 14:51:36 -0700 (In reply to comment #2) > > Source/JavaScriptCore/dfg/DFGArrayMode.cpp:203 > > - if (node->op() == GetByVal > > + if ((node->op() == GetByVal || canBecomeGetArrayLength(graph, node)) > > Looks like the comment above needs an update. > > ...The code above returns early if index is not int32. How can we get here > if we're compiling "array.length"? For GetArrayLength, the index type is the type returned by GetById("length"). 1228931 4 288232 commit-queue 2016-09-12 15:15:43 -0700 Comment on attachment 288232 Patch Clearing flags on attachment: 288232 Committed r205830: <http://trac.webkit.org/changeset/205830> 1228932 5 commit-queue 2016-09-12 15:15:46 -0700 All reviewed patches have been landed. Closing bug. 288232 2016-09-07 20:12:57 -0700 2016-09-12 15:15:43 -0700 Patch bug-161671-20160907201032.patch text/plain 9534 benjamin U3VidmVyc2lvbiBSZXZpc2lvbjogMjA1NTY2CmRpZmYgLS1naXQgYS9Tb3VyY2UvSmF2YVNjcmlw dENvcmUvQ2hhbmdlTG9nIGIvU291cmNlL0phdmFTY3JpcHRDb3JlL0NoYW5nZUxvZwppbmRleCA2 ODAwMjFlOTE0ZDdkZmRmNDEzNGMyMzk0NjlmMDQzMDIxZDE0NGZmLi44YzYwMjJjNjA0ZGI5YmNj Y2U1NTQ2NTJhZjA1NGU1NTIxMGZkMmM2IDEwMDY0NAotLS0gYS9Tb3VyY2UvSmF2YVNjcmlwdENv cmUvQ2hhbmdlTG9nCisrKyBiL1NvdXJjZS9KYXZhU2NyaXB0Q29yZS9DaGFuZ2VMb2cKQEAgLTEs MyArMSwzMyBAQAorMjAxNi0wOS0wNiAgQmVuamFtaW4gUG91bGFpbiAgPGJwb3VsYWluQGFwcGxl LmNvbT4KKworICAgICAgICBbSlNDXSBVc2UgR2V0QXJyYXlMZW5ndGggZm9yIEpTQXJyYXkubGVu Z3RoIGV2ZW4gd2hlbiB0aGUgYXJyYXkgdHlwZSBpcyB1bmRlY2lkZWQKKyAgICAgICAgaHR0cHM6 Ly9idWdzLndlYmtpdC5vcmcvc2hvd19idWcuY2dpP2lkPTE2MTY3MQorCisgICAgICAgIFJldmll d2VkIGJ5IE5PQk9EWSAoT09QUyEpLgorCisgICAgICAgIFVuZGVjaWRlZFNoYXBlIGlzIGEgdHlw ZSB3aXRoIHN0b3JhZ2UuIFdoZW4gd2UgYWxsb2NhdGUgYW4gdW5pbml0aWFsaXplZCBKU0FycmF5 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