[llvm-bugs] [Bug 46154] New: Assertion `!empty() && "empty range"' failed.

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=46154

            Bug ID: 46154
           Summary: Assertion `!empty() && "empty range"' failed.
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Register Allocator
          Assignee: unassignedbugs at nondot.org
          Reporter: paulsson at linux.vnet.ibm.com
                CC: llvm-bugs at lists.llvm.org, quentin.colombet at gmail.com

Created attachment 23558
  --> https://bugs.llvm.org/attachment.cgi?id=23558&action=edit
reduced (very small) test case

llc -mtriple=s390x-linux-gnu -mcpu=z13 -O3 -pre-RA-sched=list-ilp
-systemz-subreg-liveness -stress-sched -terminal-rule tc_notempty_emptyrange.ll
-o -

llc: /home/ijonpan/llvm-project/llvm/lib/CodeGen/LiveInterval.cpp:447: bool
llvm::LiveRange::overlaps(const llvm::LiveRange&, const llvm::CoalescerPair&,
const llvm::SlotIndexes&) const: Assertion `!empty() && "empty range"' failed.

...
#11 0x000002aa15de122e (anonymous namespace)::RAGreedy::tryAssign

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