rs6000: Delete UNSPEC_FRSP

This isn't used since 2012.  (It's a remnant of RIOS support).


	* config/rs6000/rs6000.c (rs6000_rtx_costs) <case UNSPEC>: Delete.
	* config/rs6000/rs6000.md (unspec): Delete UNSPEC_FRSP.

From-SVN: r275476

gcc/ChangeLog

+2019-09-06  Segher Boessenkool  <segher@kernel.crashing.org>
+
+	* config/rs6000/rs6000.c (rs6000_rtx_costs) <case UNSPEC>: Delete.
+	* config/rs6000/rs6000.md (unspec): Delete UNSPEC_FRSP.
+
 2019-09-06  Uroš Bizjak  <ubizjak@gmail.com>
 
 	PR target/91654

gcc/config/rs6000/rs6000.c

@@ -20907,18 +20907,6 @@ rs6000_rtx_costs (rtx x, machine_mode mode, int outer_code,
 	*total = rs6000_cost->fp;
       return false;
 
-    case UNSPEC:
-      switch (XINT (x, 1))
-	{
-	case UNSPEC_FRSP:
-	  *total = rs6000_cost->fp;
-	  return true;
-
-	default:
-	  break;
-	}
-      break;
-
     case CALL:
     case IF_THEN_ELSE:
       if (!speed)

gcc/config/rs6000/rs6000.md

@@ -58,8 +58,7 @@
 ;;
 
 (define_c_enum "unspec"
-  [UNSPEC_FRSP			; frsp for POWER machines
-   UNSPEC_PROBE_STACK		; probe stack memory reference
+  [UNSPEC_PROBE_STACK		; probe stack memory reference
    UNSPEC_TOCPTR		; address of a word pointing to the TOC
    UNSPEC_TOC			; address of the TOC (more-or-less)
    UNSPEC_TOCSLOT		; offset from r1 of toc pointer save slot