[llvm-bugs] [Bug 30246] New: PPC64: IfConverter::IfConvertDiamondCommon: Assertion `!NodePtr->isKnownSentinel()' failed

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https://llvm.org/bugs/show_bug.cgi?id=30246

            Bug ID: 30246
           Summary: PPC64: IfConverter::IfConvertDiamondCommon: Assertion
                    `!NodePtr->isKnownSentinel()' failed
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Common Code Generator Code
          Assignee: unassignedbugs at nondot.org
          Reporter: hfinkel at anl.gov
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Created attachment 17199
  --> https://llvm.org/bugs/attachment.cgi?id=17199&action=edit
bugpoint reduced test case

Running llc on the attached input asserts:

include/llvm/ADT/ilist_iterator.h:112: llvm::ilist_iterator<NodeTy,
IsReverse>::reference llvm::ilist_iterator<NodeTy, IsReverse>::operator*()
const [with NodeTy = llvm::MachineInstr; bool IsReverse = false;
llvm::ilist_iterator<NodeTy, IsReverse>::reference = llvm::MachineInstr&]:
Assertion `!NodePtr->isKnownSentinel()' failed.

>From IfConverter::IfConvertDiamondCommon.

This is on ppc64le.

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