[llvm-bugs] [Bug 28773] New: Assertion `(!ModifiedMF || EmitDone) && "Dbg values are not emitted in LDV"' with fast-isel and greedy regalloc

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https://llvm.org/bugs/show_bug.cgi?id=28773

            Bug ID: 28773
           Summary: Assertion `(!ModifiedMF || EmitDone) && "Dbg values
                    are not emitted in LDV"' with fast-isel and greedy
                    regalloc
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: Common Code Generator Code
          Assignee: unassignedbugs at nondot.org
          Reporter: eli.friedman at gmail.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Created attachment 16841
  --> https://llvm.org/bugs/attachment.cgi?id=16841&action=edit
Testcase

"llc -O0 -regalloc=greedy a.ll" crashes with the attached .ll file.  On x86-64
Linux if it matters.

I hand-edited the attached IR to insert an extra call to llvm.dbg.value, so
it's possible the debug info is invalid somehow, but I think it's okay.

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