diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 2f339ccb3b1..dac1d7af9a0 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2017-06-29  Segher Boessenkool  <segher@kernel.crashing.org>
+
+	* combine.c (combine_instructions): Print insns to dump_file, together
+	with their costs.
+
 2017-06-29  Jan Hubicka  <hubicka@ucw.cz>
 
 	* asan.c (asan_emit_stack_protection): Update.
diff --git a/gcc/combine.c b/gcc/combine.c
index 2d49bc2233c..e99382685c3 100644
--- a/gcc/combine.c
+++ b/gcc/combine.c
@@ -1213,8 +1213,10 @@ combine_instructions (rtx_insn *f, unsigned int nregs)
 	      INSN_COST (insn) = insn_rtx_cost (PATTERN (insn),
 	      					optimize_this_for_speed_p);
 	    if (dump_file)
-	      fprintf (dump_file, "insn_cost %d: %d\n",
-		       INSN_UID (insn), INSN_COST (insn));
+	      {
+		fprintf (dump_file, "insn_cost %d for ", INSN_COST (insn));
+		dump_insn_slim (dump_file, insn);
+	      }
 	  }
     }