re PR other/4932 (the i386 backend crashes on incorrect asm("... %c0 ..."))

2001-11-29  Craig Rodrigues  <rodrigc@gcc.gnu.org>

        PR other/4932
        * config/i386/i386.c (print_operand):  Verify that the
          argument to %c is a constant and not a conditional which
          needs to be reversed.

From-SVN: r47453

gcc/ChangeLog

+2001-11-29  Craig Rodrigues  <rodrigc@gcc.gnu.org>
+
+	PR other/4932
+	* config/i386/i386.c (print_operand):  Verify that the
+	  argument to %c is a constant and not a conditional which
+	  needs to be reversed.
+
 Thu Nov 29 11:12:59 2001  Geoffrey Keating (geoffk@redhat.com)
 
         * emit-rtl.c (gen_lowpart_common): Fix conversion of 

gcc/config/i386/i386.c

@@ -5650,6 +5650,13 @@ print_operand (file, x, code)
 
 	  /* Like above, but reverse condition */
 	case 'c':
+	  /* Check to see if argument to %c is really a constant 
+	     and not a condition code which needs to be reversed.  */
+	  if (GET_RTX_CLASS (GET_CODE (x)) != '<')
+	  {
+	    output_operand_lossage ("operand is neither a constant nor a condition code, invalid operand code 'c'");
+	     return;
+	  }
 	  put_condition_code (GET_CODE (x), GET_MODE (XEXP (x, 0)), 1, 0, file);
 	  return;
 	case 'f':