170406 2017-04-03 10:50:54 -0700 Inst::forEachArg could compile to more compact code 2017-04-03 11:55:56 -0700 1 1 1 Unclassified WebKit JavaScriptCore WebKit Nightly Build All All RESOLVED FIXED P2 Normal --- 1 fpizlo fpizlo ggaren jfbastien keith_miller mark.lam msaboff saam sam ysuzuki oldest_to_newest 1293678 0 fpizlo 2017-04-03 10:50:54 -0700 Patch forthcoming. 1293684 1 306084 fpizlo 2017-04-03 11:00:06 -0700 Created attachment 306084 the patch 1293693 2 306084 jfbastien 2017-04-03 11:10:41 -0700 Comment on attachment 306084 the patch View in context: https://bugs.webkit.org/attachment.cgi?id=306084&action=review lgtm > Source/JavaScriptCore/ChangeLog:21 > + shrinks by 2.7 MB. This is a 15% reduction in JavaScriptCore binary size. DAMN > Source/JavaScriptCore/b3/air/opcode_generator.rb:-1143 > -# This is a hack for JSAir. It's a joke. No more joke? 1293705 3 fpizlo 2017-04-03 11:32:27 -0700 (In reply to JF Bastien from comment #2) > Comment on attachment 306084 [details] > the patch > > View in context: > https://bugs.webkit.org/attachment.cgi?id=306084&action=review > > lgtm > > > Source/JavaScriptCore/ChangeLog:21 > > + shrinks by 2.7 MB. This is a 15% reduction in JavaScriptCore binary size. > > DAMN Yeah! We were ALWAYS_INLINE'ing a ~1600 LoC autogenerated nested switch lambda monster in >20 places. Kudos to all C++ compilers that compiled this code without ICE'ing. > > > Source/JavaScriptCore/b3/air/opcode_generator.rb:-1143 > > -# This is a hack for JSAir. It's a joke. > > No more joke? We needed that code to generate the ARES-6 "Air" benchmark. It's already been generated. So we don't really need to have this code anymore. 1293724 4 fpizlo 2017-04-03 11:54:31 -0700 It's possible, but unlikely, that this patch will show up as a perf regression or progression. We should roll it out if it regresses anything. 1293725 5 fpizlo 2017-04-03 11:55:56 -0700 Landed in https://trac.webkit.org/changeset/214827/webkit 306084 2017-04-03 11:00:06 -0700 2017-04-03 11:28:43 -0700 the patch blah.patch text/plain 19552 fpizlo SW5kZXg6IFNvdXJjZS9KYXZhU2NyaXB0Q29yZS9DaGFuZ2VMb2cKPT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PQotLS0gU291 cmNlL0phdmFTY3JpcHRDb3JlL0NoYW5nZUxvZwkocmV2aXNpb24gMjE0ODE5KQorKysgU291cmNl L0phdmFTY3JpcHRDb3JlL0NoYW5nZUxvZwkod29ya2luZyBjb3B5KQpAQCAtMSwzICsxLDM2IEBA CisyMDE3LTA0LTAzICBGaWxpcCBQaXpsbyAgPGZwaXpsb0BhcHBsZS5jb20+CisKKyAgICAgICAg SW5zdDo6Zm9yRWFjaEFyZyBjb3VsZCBjb21waWxlIHRvIG1vcmUgY29tcGFjdCBjb2RlCisgICAg ICAgIGh0dHBzOi8vYnVncy53ZWJraXQub3JnL3Nob3dfYnVnLmNnaT9pZD0xNzA0MDYKKworICAg ICAgICBSZXZpZXdlZCBieSBOT0JPRFkgKE9PUFMhKS4KKyAgICAgICAgCisgICAgICAgIFByaW9y IHRvIHRoaXMgY2hhbmdlLCBJbnN0Ojpmb3JFYWNoQXJnIGNvbXBpbGVkIHRvIGEgZ2lub3Jtb3Vz 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