LLVM ERROR: Cannot select: 0x7fc12a035510: i64 = build_pair 0x7fc12a035410, 0x7fc12a035d10 [ID=14]
  0x7fc12a035410: i32,ch,glue = CopyFromReg 0x7fc12a054110, 0x7fc12a035110, 0x7fc12a054110:1 [ID=12]
    0x7fc12a035110: i32 = Register %EAX [ID=4]
    0x7fc12a054110: ch,glue = X86ISD::WIN_FTOL 0x7fc12a054010:1, 0x7fc12a054010 [ID=11]
      0x7fc12a054010: f64,ch = X86ISD::FLD 0x7fc12a035910, 0x7fc12a035010, 0x7fc12a053e10<LD8[FixedStack0]> [ID=10]
        0x7fc12a035010: i32 = FrameIndex<0> [ID=5]
  0x7fc12a035d10: i32,ch,glue = CopyFromReg 0x7fc12a035410:1, 0x7fc12a035610, 0x7fc12a035410:2 [ID=13]
    0x7fc12a035610: i32 = Register %EDX [ID=7]
    0x7fc12a035410: i32,ch,glue = CopyFromReg 0x7fc12a054110, 0x7fc12a035110, 0x7fc12a054110:1 [ID=12]
      0x7fc12a035110: i32 = Register %EAX [ID=4]
      0x7fc12a054110: ch,glue = X86ISD::WIN_FTOL 0x7fc12a054010:1, 0x7fc12a054010 [ID=11]
        0x7fc12a054010: f64,ch = X86ISD::FLD 0x7fc12a035910, 0x7fc12a035010, 0x7fc12a053e10<LD8[FixedStack0]> [ID=10]
          0x7fc12a035010: i32 = FrameIndex<0> [ID=5]