rs6000-p8swap.c (rs6000_analyze_swaps): Process deferred rescans after the…

rs6000-p8swap.c (rs6000_analyze_swaps): Process deferred rescans after the lvx/stvx recombination pre-pass.

2017-10-09  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	* config/rs6000/rs6000-p8swap.c (rs6000_analyze_swaps): Process
	deferred rescans after the lvx/stvx recombination pre-pass.

From-SVN: r253555

gcc/ChangeLog

+2017-10-09  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>
+
+	* config/rs6000/rs6000-p8swap.c (rs6000_analyze_swaps): Process
+	deferred rescans after the lvx/stvx recombination pre-pass.
+
 2017-10-09  Michael Meissner  <meissner@linux.vnet.ibm.com>
 
 	* config/rs6000/amo.h: New include file to provide ISA 3.0 atomic

gcc/config/rs6000/rs6000-p8swap.c

@@ -1882,6 +1882,7 @@ rs6000_analyze_swaps (function *fun)
 
   /* Pre-pass to recombine lvx and stvx patterns so we don't lose info.  */
   recombine_lvx_stvx_patterns (fun);
+  df_process_deferred_rescans ();
 
   /* Allocate structure to represent webs of insns.  */
   insn_entry = XCNEWVEC (swap_web_entry, get_max_uid ());