183694 2018-03-16 03:43:23 -0700 [DFG][FTL] Add vectorLengthHint for NewArray 2018-03-20 00:59:20 -0700 1 1 1 Unclassified WebKit New Bugs WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 ysuzuki ysuzuki ews-watchlist fpizlo jfbastien keith_miller mark.lam msaboff saam ticaiolima webkit-bug-importer oldest_to_newest 1406959 0 ysuzuki 2018-03-16 03:43:23 -0700 [DFG][FTL] Add vectorLengthHint for NewArray 1406960 1 335928 ysuzuki 2018-03-16 03:46:52 -0700 Created attachment 335928 Patch 1406961 2 335928 ticaiolima 2018-03-16 04:07:20 -0700 Comment on attachment 335928 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=335928&action=review LGTM. I have some suggestions in the tests. Also, why not create a microbenchmark for that? > JSTests/stress/vector-length-hint-new-array.js:3 > + throw new Error('bad value: ' + actual); I think you should print the expected value as well. I helps a lot when it crashes on EWS. 1407587 3 335928 saam 2018-03-19 22:06:37 -0700 Comment on attachment 335928 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=335928&action=review r=me > Source/JavaScriptCore/dfg/DFGSpeculativeJIT64.cpp:3734 > + ASSERT(vectorLengthHint >= numElements); I’d make this a validation rule 1407618 4 335928 ysuzuki 2018-03-20 00:43:48 -0700 Comment on attachment 335928 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=335928&action=review Thank you >> Source/JavaScriptCore/dfg/DFGSpeculativeJIT64.cpp:3734 >> + ASSERT(vectorLengthHint >= numElements); > > I’d make this a validation rule Added that rules. >> JSTests/stress/vector-length-hint-new-array.js:3 >> + throw new Error('bad value: ' + actual); > > I think you should print the expected value as well. I helps a lot when it crashes on EWS. Added 1407619 5 ysuzuki 2018-03-20 00:58:27 -0700 Committed r229743: <https://trac.webkit.org/changeset/229743> 1407620 6 webkit-bug-importer 2018-03-20 00:59:20 -0700 <rdar://problem/38655034> 335928 2018-03-16 03:46:52 -0700 2018-03-19 22:06:37 -0700 Patch bug-183694-20180316194651.patch text/plain 8899 ysuzuki U3VidmVyc2lvbiBSZXZpc2lvbjogMjI5NjU5CmRpZmYgLS1naXQgYS9Tb3VyY2UvSmF2YVNjcmlw dENvcmUvQ2hhbmdlTG9nIGIvU291cmNlL0phdmFTY3JpcHRDb3JlL0NoYW5nZUxvZwppbmRleCBk MGM5NzgzYTkwMGQwZjIzMmY3ZDVkMGY4NWE5ODA2ODRmOTI1MTRmLi44NzlmMDQ4MTllZjNlMzg0 MTdjZDczZDdlYzA5YWFkMjU2MzA0ZDU3IDEwMDY0NAotLS0gYS9Tb3VyY2UvSmF2YVNjcmlwdENv cmUvQ2hhbmdlTG9nCisrKyBiL1NvdXJjZS9KYXZhU2NyaXB0Q29yZS9DaGFuZ2VMb2cKQEAgLTEs MyArMSw0MSBAQAorMjAxOC0wMy0xNiAgWXVzdWtlIFN1enVraSAgPHV0YXRhbmUudGVhQGdtYWls LmNvbT4KKworICAgICAgICBbREZHXVtGVExdIEFkZCB2ZWN0b3JMZW5ndGhIaW50IGZvciBOZXdB cnJheQorICAgICAgICBodHRwczovL2J1Z3Mud2Via2l0Lm9yZy9zaG93X2J1Zy5jZ2k/aWQ9MTgz 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