https://bugs.llvm.org/show_bug.cgi?id=37790

            Bug ID: 37790
           Summary: [llvm-mca] hangs with int3/stmxcsr input
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: new bugs
          Assignee: unassignedb...@nondot.org
          Reporter: greg.bedw...@sony.com
                CC: andrea.dibia...@gmail.com, llvm-bugs@lists.llvm.org,
                    llvm-...@redking.me.uk, matthew.da...@sony.com

Tested using r334380.

$ cat y.s
int3
stmxcsr  (%rsp)

$ llvm-mca -mcpu=btver2 y.s
<hangs>


as demonstrated at https://godbolt.org/g/47rem6

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