gcse.c (delete_null_pointer_checks_1): Cope when get_condition cannot determine the condition.

	* gcse.c (delete_null_pointer_checks_1): Cope when
	get_condition cannot determine the condition.

From-SVN: r31347

gcc/ChangeLog

+Wed Jan 12 09:39:22 2000  Nick Burrett  <nick.burrett@btinternet.com>
+
+	* gcse.c (delete_null_pointer_checks_1): Cope when
+	get_condition cannot determine the condition.
+
 2000-01-12  Gabriel Dos Reis  <gdr@codesourcery.com>
  
        * toplev.h (set_message_length): Declare.

gcc/gcse.c

@@ -5131,6 +5131,10 @@ delete_null_pointer_checks_1 (block_reg, nonnull_avin, nonnull_avout, npi)
       /* LAST_INSN is a conditional jump.  Get its condition.  */
       condition = get_condition (last_insn, &earliest);
 
+      /* If we can't determine the condition then skip.  */
+      if (! condition)
+	continue;
+
       /* Is the register known to have a nonzero value?  */
       if (!TEST_BIT (nonnull_avout[bb], block_reg[bb] - npi->min_reg))
 	continue;