commit 158044e96e95e4637a7c9519f864ec07d6a596de
Author: Jeff Law <law@redhat.com>
Date:   Fri Oct 9 15:14:16 2015 -0600

    Re: [PATCH] Update SSA_NAME manager to use two lists
    
    	* tree-ssanames.c (flush_ssaname_freelist): Use splice and truncate
    	rather than moving each name to the freelist individually.

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 69743c3..4b81033 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2015-10-09  Jeff Law  <law@redhat.com>
+
+	* tree-ssanames.c (flush_ssaname_freelist): Use splice and truncate
+	rather than moving each name to the freelist individually.
+
 2015-10-09  Steve Ellcey  <sellcey@imgtec.com>
 
 	* config.gcc (mips*-*-*): Add frame-header-opt.o to extra_objs.
diff --git a/gcc/tree-ssanames.c b/gcc/tree-ssanames.c
index 91f4ed8..82fd4a1 100644
--- a/gcc/tree-ssanames.c
+++ b/gcc/tree-ssanames.c
@@ -127,11 +127,8 @@ ssanames_print_statistics (void)
 void
 flush_ssaname_freelist (void)
 {
-  while (!vec_safe_is_empty (FREE_SSANAMES_QUEUE (cfun)))
-    {
-      tree t = FREE_SSANAMES_QUEUE (cfun)->pop ();
-      vec_safe_push (FREE_SSANAMES (cfun), t);
-    }
+  vec_safe_splice (FREE_SSANAMES (cfun), FREE_SSANAMES_QUEUE (cfun));
+  vec_safe_truncate (FREE_SSANAMES_QUEUE (cfun), 0);
 }
 
 /* Return an SSA_NAME node for variable VAR defined in statement STMT