[llvm-bugs] [Bug 48762] New: [RegAlloc: subreg liveness] Bad machine code: Live segment doesn't end at a valid instruction

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=48762

            Bug ID: 48762
           Summary: [RegAlloc: subreg liveness]  Bad machine code: Live
                    segment doesn't end at a valid instruction
           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: paulsson at linux.vnet.ibm.com
                CC: llvm-bugs at lists.llvm.org

Created attachment 24383
  --> https://bugs.llvm.org/attachment.cgi?id=24383&action=edit
reduced testcase

bin/llc -mcpu=arch13 -O3 -disable-lsr -systemz-subreg-liveness -verify-misched
tc_crash3_aftercreduce.ll

*** Bad machine code: Live segment doesn't end at a valid instruction ***
- function:    q
- basic block: %bb.2 bb2 (0x6f657d0) [160B;256B)
- liverange:   [192r,208d:3)[1472r,1584B:1)[2800r,2912B:0)[2912B,3040r:2) 
0 at 2800r 1 at 1472r 2 at 2912B-phi 3 at 192r 4 at x 5 at x 6 at x
- v. register: %102
- lanemask:    0000000000000001
- segment:     [192r,208d:3)
LLVM ERROR: Found 1 machine code errors.

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