--- a/gcc/tree-call-cdce.c	Fri Oct 27 22:46:09 2017 +0900
+++ b/gcc/tree-call-cdce.c	Thu Oct 25 07:37:49 2018 +0900
@@ -1,5 +1,5 @@
 /* Conditional Dead Call Elimination pass for the GNU compiler.
-   Copyright (C) 2008-2017 Free Software Foundation, Inc.
+   Copyright (C) 2008-2018 Free Software Foundation, Inc.
    Contributed by Xinliang David Li <davidxl@google.com>
 
 This file is part of GCC.
@@ -314,6 +314,7 @@
     CASE_FLT_FN (BUILT_IN_POW10):
     /* Sqrt.  */
     CASE_FLT_FN (BUILT_IN_SQRT):
+    CASE_FLT_FN_FLOATN_NX (BUILT_IN_SQRT):
       return check_builtin_call (call);
     /* Special one: two argument pow.  */
     case BUILT_IN_POW:
@@ -342,6 +343,7 @@
     CASE_FLT_FN (BUILT_IN_SIGNIFICAND):
     CASE_FLT_FN (BUILT_IN_SIN):
     CASE_FLT_FN (BUILT_IN_SQRT):
+    CASE_FLT_FN_FLOATN_NX (BUILT_IN_SQRT):
     CASE_FLT_FN (BUILT_IN_FMOD):
     CASE_FLT_FN (BUILT_IN_REMAINDER):
       return true;
@@ -703,6 +705,7 @@
                          308, true, false);
     /* sqrt: [0, +inf)  */
     CASE_FLT_FN (BUILT_IN_SQRT):
+    CASE_FLT_FN_FLOATN_NX (BUILT_IN_SQRT):
       return get_domain (0, true, true,
                          0, false, false);
     default:
@@ -734,7 +737,7 @@
 
   call = bi_call;
   fn = gimple_call_fndecl (call);
-  gcc_assert (fn && DECL_BUILT_IN (fn));
+  gcc_assert (fn && fndecl_built_in_p (fn));
   fnc = DECL_FUNCTION_CODE (fn);
   *nconds = 0;
 
@@ -903,7 +906,6 @@
      Here we take the second approach because it's slightly simpler
      and because it's easy to see that it doesn't lose profile counts.  */
   bi_call_bb->count = profile_count::zero ();
-  bi_call_bb->frequency = 0;
   while (!edges.is_empty ())
     {
       edge_pair e = edges.pop ();
@@ -916,16 +918,10 @@
       nocall_edge->probability = profile_probability::always ()
 				 - call_edge->probability;
 
-      unsigned int call_frequency
-	 = call_edge->probability.apply (src_bb->frequency);
-
       bi_call_bb->count += call_edge->count ();
-      bi_call_bb->frequency += call_frequency;
 
       if (nocall_edge->dest != join_tgt_bb)
-	{
-	  nocall_edge->dest->frequency = src_bb->frequency - call_frequency;
-	}
+	nocall_edge->dest->count = src_bb->count - bi_call_bb->count;
     }
 
   if (dom_info_available_p (CDI_DOMINATORS))