189757 2018-09-19 11:24:12 -0700 AI rule for MultiPutByOffset executes its effects in the wrong order 2018-10-03 16:28:21 -0700 1 1 1 Unclassified WebKit JavaScriptCore WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 saam saam benjamin commit-queue fpizlo ggaren gskachkov keith_miller mark.lam msaboff rmorisset ticaiolima webkit-bug-importer ysuzuki zhunkibatu oldest_to_newest 1461053 0 saam 2018-09-19 11:24:12 -0700 Look at this code: ``` observeTransitions(clobberLimit, transitions); if (forNode(node->child1()).changeStructure(m_graph, newSet) == Contradiction) m_state.setIsValid(false); setForNode(node->child2(), resultingValue); if (!!originalValue && !resultingValue) m_state.setIsValid(false); ``` However, we first need to execute the last three lines before the first three lines. This is because that's how the execution of the node happens at runtime. This can lead to bad results when resultingValue is the same as the base, e.g: ``` o.f = o; ``` 1461054 1 saam 2018-09-19 11:25:04 -0700 <rdar://problem/43535257> 1461064 2 350139 saam 2018-09-19 12:02:10 -0700 Created attachment 350139 patch 1461066 3 350139 msaboff 2018-09-19 12:06:29 -0700 Comment on attachment 350139 patch r=me 1461113 4 350139 commit-queue 2018-09-19 14:00:15 -0700 Comment on attachment 350139 patch Clearing flags on attachment: 350139 Committed r236223: <https://trac.webkit.org/changeset/236223> 1461114 5 commit-queue 2018-09-19 14:00:16 -0700 All reviewed patches have been landed. Closing bug. 1466227 6 mark.lam 2018-10-03 16:28:21 -0700 *** Bug 188694 has been marked as a duplicate of this bug. *** 350139 2018-09-19 12:02:10 -0700 2018-09-19 14:00:15 -0700 patch c-backup.diff text/plain 4019 saam SW5kZXg6IEpTVGVzdHMvQ2hhbmdlTG9nCj09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT0KLS0tIEpTVGVzdHMvQ2hhbmdlTG9n CShyZXZpc2lvbiAyMzYyMTMpCisrKyBKU1Rlc3RzL0NoYW5nZUxvZwkod29ya2luZyBjb3B5KQpA QCAtMSwzICsxLDE2IEBACisyMDE4LTA5LTE5ICBTYWFtIGJhcmF0aSAgPHNiYXJhdGlAYXBwbGUu Y29tPgorCisgICAgICAgIEFJIHJ1bGUgZm9yIE11bHRpUHV0QnlPZmZzZXQgZXhlY3V0ZXMgaXRz IGVmZmVjdHMgaW4gdGhlIHdyb25nIG9yZGVyCisgICAgICAgIGh0dHBzOi8vYnVncy53ZWJraXQu b3JnL3Nob3dfYnVnLmNnaT9pZD0xODk3NTcKKyAgICAgICAgPHJkYXI6Ly9wcm9ibGVtLzQzNTM1 MjU3PgorCisgICAgICAgIFJldmlld2VkIGJ5IE5PQk9EWSAoT09QUyEpLgorCisgICAgICAgICog c3RyZXNzL211bHRpLXB1dC1ieS1vZmZzZXQtbXVzdC1maWx0ZXItdmFsdWUtYmVmb3JlLWZpbHRl cmluZy1iYXNlLmpzOiBBZGRlZC4KKyAgICAgICAgKGZvbyk6CisgICAgICAgIChGb28pOgorICAg 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