[SimplifyCFG] changeToUnreachable(): switch to non-permissive DomTree updates
authorRoman Lebedev <lebedev.ri@gmail.com>
Thu, 7 Jan 2021 20:55:21 +0000 (23:55 +0300)
committerRoman Lebedev <lebedev.ri@gmail.com>
Thu, 7 Jan 2021 23:15:26 +0000 (02:15 +0300)
commit05adc73db053fd79e64901e359e6ee783d772a80
treee1e5884fdc8c6e4320f65838473c14487939c79e
parent6984781df9b584febce51b7740c8738a076f5692
[SimplifyCFG] changeToUnreachable(): switch to non-permissive DomTree updates

... which requires not deleting edges that were just deleted already,
    by not processing the same predecessor more than once.
llvm/lib/Transforms/Utils/Local.cpp