diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 8fe370bc954..6f6f6668031 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+1999-05-17  Andreas Schwab  <schwab@issan.cs.uni-dortmund.de>
+
+	* cse.c (cse_insn): Copy SRC_CONST before putting it in the
+	REG_EQUAL note.
+
 1999-05-17  Mike Stump  <mrs@wrs.com>
 
 	* rs6000/vxppc.h (CPP_SPEC): Fix support for vararg functions.
diff --git a/gcc/cse.c b/gcc/cse.c
index 72a1ff63c3d..5fc6c7889a2 100644
--- a/gcc/cse.c
+++ b/gcc/cse.c
@@ -7323,6 +7323,9 @@ cse_insn (insn, libcall_insn)
 	{
 	  tem = find_reg_note (insn, REG_EQUAL, NULL_RTX);
 	  
+	  /* Make sure that the rtx is not shared with any other insn.  */
+	  src_const = copy_rtx (src_const);
+
 	  /* Record the actual constant value in a REG_EQUAL note, making
 	     a new one if one does not already exist.  */
 	  if (tem)