diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 2212bac341c..3fb28e50bbd 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2002-09-26  David S. Miller  <davem@redhat.com>
+
+	PR optimization/7335
+	* calls.c (emit_library_call_value_1): Passing args by reference
+	converts a CONST function into a PURE one.
+
 2002-09-26  David Edelsohn  <edelsohn@gnu.org>
 
 	* dbxout.c (FORCE_TEXT): Switch to current_function_decl, not
diff --git a/gcc/calls.c b/gcc/calls.c
index d4e3f009589..ffedacabbb0 100644
--- a/gcc/calls.c
+++ b/gcc/calls.c
@@ -3684,6 +3684,14 @@ emit_library_call_value_1 (retval, orgfun, value, fn_type, outmode, nargs, p)
 	    }
 	  flags &= ~(ECF_CONST | ECF_PURE | ECF_LIBCALL_BLOCK);
 
+	  /* If this was a CONST function, it is now PURE since
+	     it now reads memory.  */
+	  if (flags & ECF_CONST)
+	    {
+	      flags &= ~ECF_CONST;
+	      flags |= ECF_PURE;
+	    }
+
 	  if (GET_MODE (val) == MEM && ! must_copy)
 	    slot = val;
 	  else if (must_copy)