diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 2ea55b83aa6..f6c768aa097 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+Thu May 27 02:40:48 1999  J"orn Rennecke <amylaar@cygnus.co.uk>
+
+	* loop.c (strength_reduce): Don't do biv->giv conversion on constants.
+
 Thu May 27 02:09:27 1999  Jeffrey A Law  (law@cygnus.com)
 
 	* reload.c (push_reload): Do not call remove_address_replacements
diff --git a/gcc/loop.c b/gcc/loop.c
index 7ee653218ca..c7047f286f0 100644
--- a/gcc/loop.c
+++ b/gcc/loop.c
@@ -4193,6 +4193,8 @@ strength_reduce (scan_start, end, loop_top, insn_count,
 		  || ! next->always_executed
 		  || next->maybe_multiple
 		  || ! CONSTANT_P (next->add_val)
+		  || v->mult_val != const1_rtx
+		  || next->mult_val != const1_rtx
 		  || ! (biv_dead_after_loop
 			|| no_jumps_between_p (v->insn, next->insn)))
 		{