[llvm-bugs] [Bug 50617] New: llvm got crash in GCNDPPCombine pass when I compile the rocPRIM test

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=50617

            Bug ID: 50617
           Summary: llvm got crash in GCNDPPCombine pass  when  I compile
                    the rocPRIM  test
           Product: libraries
           Version: 12.0
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Backend: AMDGPU
          Assignee: unassignedbugs at nondot.org
          Reporter: qishilu3 at 163.com
                CC: llvm-bugs at lists.llvm.org

it crash at function execMayBeModifiedBeforeAnyUse(const MachineRegisterInfo
&MRI,
                                          Register VReg,
                                         const MachineInstr &DefMI)

the input IR Instr (arg DefMI of the function ) is at line 17628 in the
crash.log  


the crash log and  the IR  before GCN DPP Combine pass is attached.

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