[llvm-bugs] [Bug 30284] New: Assertion `!B->isCollapsed() && "Cannot merge from collapsed"' failed after R278097.

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=30284

            Bug ID: 30284
           Summary: Assertion `!B->isCollapsed() && "Cannot merge from
                    collapsed"' failed after R278097.
           Product: tools
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: llc
          Assignee: unassignedbugs at nondot.org
          Reporter: shishpanov2010 at yandex.ru
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Created attachment 17213
  --> https://llvm.org/bugs/attachment.cgi?id=17213&action=edit
IR sample

LLC emits assertion fail after R278097 on x86 with SKX. 

Launch command for reproducer: llc -march=x86 -mcpu=skx sample.ll

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