* loop.c (scan_loop): Honor AVOID_CC_MODE_COPIES.

From-SVN: r21935

gcc/ChangeLog

 Mon Aug 24 10:25:46 1998  Jeffrey A Law  (law@cygnus.com)
 
+        * loop.c (scan_loop): Honor AVOID_CC_MODE_COPIES.
+
 	* h8300.h (STRIP_NAME_ENCODING): Fix typo.
 
 	* sparc.md (TFmode splits): Use reg_overlap_mentioned_p to detect

gcc/loop.c

@@ -781,6 +781,16 @@ scan_loop (loop_start, end, unroll_p)
 
   for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
     may_not_optimize[i] = 1, n_times_set[i] = 1;
+
+#ifdef AVOID_CCMODE_COPIES
+  /* Don't try to move insns which set CC registers if we should not
+     create CCmode register copies.  */
+     be avoiding
+  for (i = FIRST_PSEUDO_REGISTER; i < nregs - loop_mems_idx; i++)
+    if (GET_MODE_CLASS (GET_MODE (regno_reg_rtx[i])) == MODE_CC)
+      may_not_optimize[i] = 1;
+#endif
+
   bcopy ((char *) n_times_set, (char *) n_times_used, nregs * sizeof (int));
 
   if (loop_dump_stream)