diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 83749d5..23dbb3a 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -17675,18 +17675,20 @@ output_387_binary_op (rtx insn, rtx *operands)
 
   /* Even if we do not want to check the inputs, this documents input
      constraints.  Which helps in understanding the following code.  */
-  if (flag_checking
-      && STACK_REG_P (operands[0])
-      && ((REG_P (operands[1])
-	   && REGNO (operands[0]) == REGNO (operands[1])
-	   && (STACK_REG_P (operands[2]) || MEM_P (operands[2])))
-	  || (REG_P (operands[2])
-	      && REGNO (operands[0]) == REGNO (operands[2])
-	      && (STACK_REG_P (operands[1]) || MEM_P (operands[1]))))
-      && (STACK_TOP_P (operands[1]) || STACK_TOP_P (operands[2])))
-    ; /* ok */
-  else
-    gcc_checking_assert (is_sse);
+  if (flag_checking)
+    {
+      if (STACK_REG_P (operands[0])
+	  && ((REG_P (operands[1])
+	       && REGNO (operands[0]) == REGNO (operands[1])
+	       && (STACK_REG_P (operands[2]) || MEM_P (operands[2])))
+	      || (REG_P (operands[2])
+		  && REGNO (operands[0]) == REGNO (operands[2])
+		  && (STACK_REG_P (operands[1]) || MEM_P (operands[1]))))
+	  && (STACK_TOP_P (operands[1]) || STACK_TOP_P (operands[2])))
+	; /* ok */
+      else
+	gcc_assert (is_sse);
+    }
 
   switch (GET_CODE (operands[3]))
     {
diff --git a/gcc/testsuite/gcc.target/i386/pr68497.c b/gcc/testsuite/gcc.target/i386/pr68497.c
new file mode 100644
index 0000000..0135cda
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr68497.c
@@ -0,0 +1,8 @@
+/* { dg-do compile } */
+/* { dg-options "-fno-checking" } */
+
+long double
+foo (long double x, long double y)
+{
+  return x + y;
+}