S/390: Improve debug output for builtin matching

gcc/ChangeLog:

2019-03-25  Andreas Krebbel  <krebbel@linux.ibm.com>

	* config/s390/s390-c.c (s390_fn_types_compatible): Print the
	expected and found types with -mdebug during builtin matching.

From-SVN: r269908

gcc/ChangeLog

+2019-03-25  Andreas Krebbel  <krebbel@linux.ibm.com>
+
+	* config/s390/s390-c.c (s390_fn_types_compatible): Print the
+	expected and found types with -mdebug during builtin matching.
+
 2019-03-25  Richard Biener  <rguenther@suse.de>
 
 	PR middle-end/89790

gcc/config/s390/s390-c.c

@@ -810,7 +810,13 @@ s390_fn_types_compatible (enum s390_builtin_ov_type_index typeindex,
 
     mismatch:
       if (TARGET_DEBUG_ARG)
-	fprintf (stderr, " mismatch in operand: %d\n", i + 1);
+	{
+	  fprintf (stderr, " mismatch in operand: %d incoming: ", i + 1);
+	  print_generic_expr (stderr, in_type, TDF_VOPS|TDF_MEMSYMS);
+	  fprintf (stderr, " expected: ");
+	  print_generic_expr (stderr, b_arg_type, TDF_VOPS|TDF_MEMSYMS);
+	  fprintf (stderr, "\n");
+	}
       return INT_MAX;
     }