--- gcc/combine.c.jj	2014-05-15 12:37:42.000000000 +0200
+++ gcc/combine.c	2016-12-13 19:52:25.428818416 +0100
@@ -12626,6 +12626,10 @@ distribute_notes (rtx notes, rtx from_in
   rtx note, next_note;
   rtx tem;
 
+  /* If i2 has been deleted by earlier distribute_notes call, ignore it.  */
+  if (i2 && NOTE_P (i2) && NOTE_KIND (i2) == NOTE_INSN_DELETED)
+    i2 = NULL_RTX;
+
   for (note = notes; note; note = next_note)
     {
       rtx place = 0, place2 = 0;
--- gcc/testsuite/gcc.c-torture/compile/rh1402484.c	1970-01-01 01:00:00.000000000 +0100
+++ gcc/testsuite/gcc.c-torture/compile/rh1402484.c	2017-12-07 14:15:06.140836089 +0100
@@ -0,0 +1,14 @@
+unsigned short a;
+int b;
+
+void
+foo (void)
+{
+  union { long e; int f[2]; } c;
+  int d;
+  c.f[0] = 0;
+  c.f[1] = d << 1;
+  a = c.e;
+  if (a == 0)
+    b = 0;
+}