x86: Always update EH return address in word_mode

On x86, return address is always popped in word_mode.  eh_return needs
to put EH return address in word_mode on stack.

gcc/

	PR target/87014
	* config/i386/i386.md (eh_return): Always update EH return
	address in word_mode.

gcc/testsuite/

	PR target/87014
	* g++.dg/torture/pr87014.C: New file.

From-SVN: r263672

gcc/ChangeLog

+2018-08-20  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR target/87014
+	* config/i386/i386.md (eh_return): Always update EH return
+	address in word_mode.
+
 2018-08-20  Chung-Lin Tang  <cltang@codesourcery.com>
 
 	* targhooks.c (std_gimplify_va_arg_expr): Properly handle case of when

gcc/config/i386/i386.md

@@ -13612,7 +13612,10 @@
      stack address we wish to restore.  */
   tmp = gen_rtx_PLUS (Pmode, arg_pointer_rtx, sa);
   tmp = plus_constant (Pmode, tmp, -UNITS_PER_WORD);
-  tmp = gen_rtx_MEM (Pmode, tmp);
+  /* Return address is always in word_mode.  */
+  tmp = gen_rtx_MEM (word_mode, tmp);
+  if (GET_MODE (ra) != word_mode)
+    ra = convert_to_mode (word_mode, ra, 1);
   emit_move_insn (tmp, ra);
 
   emit_jump_insn (gen_eh_return_internal ());

gcc/testsuite/ChangeLog

+2018-08-20  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR target/87014
+	* g++.dg/torture/pr87014.C: New file.
+
 2018-08-20  Bernd Edlinger  <bernd.edlinger@hotmail.de>
 
 	PR target/86984

gcc/testsuite/g++.dg/torture/pr87014.C

+// { dg-do run }
+
+void
+fillstack ()
+{
+  long long foo[] =
+    {
+      -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+    };
+}
+
+void
+f (long long=-1,long long=-1,long long=-1,long long=-1,
+   long long=-1,long long=-1,long long arg7_on_stack=-1)
+{
+  throw 0;
+}
+
+void
+g()
+{
+  try
+    {
+      f ();
+    }
+  catch (int)
+    {
+    }
+}
+
+int
+main()
+{
+  fillstack ();
+  g ();
+  return 0;
+}