[llvm-bugs] [Bug 30719] New: Failure to disassemble variant encoding of test instruction

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=30719

            Bug ID: 30719
           Summary: Failure to disassemble variant encoding of test
                    instruction
           Product: libraries
           Version: 3.9
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Backend: X86
          Assignee: unassignedbugs at nondot.org
          Reporter: nholcomb at wisc.edu
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

The following are the bytes of a test instruction and the expected output. LLVM
returns an error when disassembling these bytes.

Bytes: f6 0b 50
Expected output: test $0x50,(%rbx)

The other possible encoding of this instruction is f6 03 50.

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