https://bugs.kde.org/show_bug.cgi?id=387712

--- Comment #1 from Mark Wielaard <m...@klomp.org> ---
==== SB 4912 (evchecks 237802) [tid 1] 0x406615c __libdwfl_frame_unwind+44
/home/mjw/elfutils/libdw/libdw.so+0x3515c

------------------------ Front end ------------------------

lg       %r1,16(%r11)
              ------ IMark(0x406615C, 6, 0) ------
              t1 = 0x10:I64
              t0 = Add64(Add64(t1,GET:I64(280)),0x0:I64)
              PUT(200) = LDbe:I64(t0)
              PUT(336) = 0x4066162:I64

lg       %r3,176(%r15)
              ------ IMark(0x4066162, 6, 0) ------
              t3 = 0xB0:I64
              t2 = Add64(Add64(t3,GET:I64(312)),0x0:I64)
              PUT(216) = LDbe:I64(t2)
              PUT(336) = 0x4066168:I64

tmhh     %r1,16384
              ------ IMark(0x4066168, 4, 0) ------
              t4 = GET:I16(200)
              t5 = 0x4000:I16
              PUT(352) = 0x13:I64
              PUT(360) = 16Uto64(t4)
              PUT(368) = 16Uto64(t5)
              PUT(376) = 0x0:I64
              PUT(336) = 0x406616C:I64

jne      .+10
              ------ IMark(0x406616C, 4, 0) ------
              t6 =
s390_calculate_cond[mcx=0x13]{0x8000fe588}(0x7:I64,GET:I64(352),GET:I64(360),GET:I64(368),GET:I64(376)):I32
              if (CmpNE32(t6,0x0:I32)) { PUT(336) = 0x4066176:I64; exit-Boring
} 
              PUT(336) = 0x4066170:I64
              PUT(336) = GET:I64(336); exit-Boring

GuestBytes 406615C 20  E3 10 B0 10 00 04 E3 30 F0 B0 00 04 A7 12 40 00 A7 74 00
05  06337FED

------------------------  After tree-building ------------------------

IRSB {
   t0:I64   t1:I64   t2:I64   t3:I64   t4:I16   t5:I16   t6:I32   t7:I64
   t8:I64   t9:I64   t10:I64   t11:I64   t12:I64   t13:I64   t14:I64   t15:I64
   t16:I64   t17:I64   t18:I64   t19:I64   t20:I64   t21:I32   t22:I1   t23:I64
   t24:I64   t25:I32   t26:I1   t27:I64   

   ------ IMark(0x406615C, 6, 0) ------
   PUT(200) = LDbe:I64(Add64(0x10:I64,GET:I64(280)))
   PUT(336) = 0x4066162:I64
   ------ IMark(0x4066162, 6, 0) ------
   PUT(216) = LDbe:I64(Add64(0xB0:I64,GET:I64(312)))
   ------ IMark(0x4066168, 4, 0) ------
   PUT(352) = 0x13:I64
   t24 = 16Uto64(GET:I16(200))
   PUT(360) = t24
   PUT(368) = 0x4000:I64
   PUT(376) = 0x0:I64
   PUT(336) = 0x406616C:I64
   ------ IMark(0x406616C, 4, 0) ------
   if (CmpNE64(And64(t24,0x4000:I64),0x0:I64)) { PUT(336) = 0x4066176:I64;
exit-Boring } 
   PUT(336) = 0x4066170:I64; exit-Boring
}

VexExpansionRatio 20 168   84 :10

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