This isn't used since 2018. (It's a remnant of paired single support).
* config/rs6000/rs6000.md (unspec): Delete UNSPEC_MV_CR_OV.
From-SVN: r275477
+2019-09-06 Segher Boessenkool <segher@kernel.crashing.org>
+
+ * config/rs6000/rs6000.md (unspec): Delete UNSPEC_MV_CR_OV.
+
2019-09-06 Segher Boessenkool <segher@kernel.crashing.org>
* config/rs6000/rs6000.c (rs6000_rtx_costs) <case UNSPEC>: Delete.
UNSPEC_TOC ; address of the TOC (more-or-less)
UNSPEC_TOCSLOT ; offset from r1 of toc pointer save slot
UNSPEC_MOVSI_GOT
- UNSPEC_MV_CR_OV ; move_from_CR_ov_bit
UNSPEC_FCTIWZ
UNSPEC_FRIM
UNSPEC_FRIN