diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 1beac6c82b6..1bf12bd5667 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+Sun Jan 25 12:13:47 1998  Michael Tiemann  <michael@tiemann.org>
+
+	* cse.c (simplify_ternary_operation): Don't try to simplify
+	IF_THEN_ELSE expressions (created by combine) that don't use
+	relational operators.
+
 Fri Jan 23 22:48:24 1998  Jeffrey A Law  (law@cygnus.com)
 
 	* cse.c (simplify_ternary_operation): Handle more IF_THEN_ELSE
diff --git a/gcc/cse.c b/gcc/cse.c
index 3c27387562a..22d6b8b0976 100644
--- a/gcc/cse.c
+++ b/gcc/cse.c
@@ -4713,7 +4713,7 @@ simplify_ternary_operation (code, mode, op0_mode, op0, op1, op2)
 	  && rtx_equal_p (XEXP (op0, 1), op1)
 	  && rtx_equal_p (XEXP (op0, 0), op2))
 	return op2;
-      else if (! side_effects_p (op0))
+      else if (GET_RTX_CLASS (GET_CODE (op0)) == '<' && ! side_effects_p (op0))
 	{
 	  rtx temp;
 	  temp = simplify_relational_operation (GET_CODE (op0), op0_mode,