2 Commits

Author	SHA1	Message	Date
Kuba Mracek	6b53ad298e	[GlobalDCE] [VFE] Avoid dropping vfunc dependencies when an invalid vtable entry is present ... When we scan vtables for a particular vload in ScanVTableLoad and an entry in one possible vtable is invalid (null or non-fptr), we bail in a wrong way -- we completely stop the scanning of vtables and this results in dropped dependencies and incorrectly removed vfuncs from vtables. Let's fix that by correcting the bailing logic to keep iterating and only skip the invalid entries. Differential Revision: https://reviews.llvm.org/D120006	2022-02-17 19:41:46 -08:00
Kuba Mracek	21e5a5f0cf	[GlobalDCE] [VFE] Add a test for incorrect VFE behavior in presence of null/invalid vtable entries ... Add a test for VFE where there's several vtables, and one of them contains an invalid entry (from VFE's perspective), and which causes VFE to incorrectly skip scanning subsequent vtables and drop their dependencies.	2022-02-17 10:46:54 -08:00