Fix ia64-linux glibc intl/loadmsgcat.c miscompilation.

	* ifcvt.c (noce_process_if_block): If A and B are the same, and no
	else block, and X has side-effects, then fail.

From-SVN: r36373

gcc/ChangeLog

+2000-09-12  Jim Wilson  <wilson@cygnus.com>
+
+	* ifcvt.c (noce_process_if_block): If A and B are the same, and no
+	else block, and X has side-effects, then fail.
+
 2000-09-12  Greg McGary  <greg@mcgary.org>
 
 	* config/mips/mips-protos.h

gcc/ifcvt.c

@@ -1247,6 +1247,11 @@ noce_process_if_block (test_bb, then_bb, else_bb, join_bb)
 	  reorder_insns (insn_b, insn_b, PREV_INSN (if_info.cond_earliest));
 	  insn_b = NULL_RTX;
 	}
+      /* If we have "x = b; if (...) x = a;", and x has side-effects, then
+	 x must be executed twice.  */
+      else if (insn_b && side_effects_p (orig_x))
+	return FALSE;
+	
       x = orig_x;
       goto success;
     }