Hi!

The attached patch fixes a problem introduced in r229567: the assertion

gcc_assert (is_sse);

is checked if flag_checking is false, and this causes an ICE when compiling with
-fno-checking.

Bootstrapped and regtested on x86_64-pc-linux-gnu. OK for trunk?

-- 
Regards,
    Mikhail Maltsev

gcc/ChangeLog:

2015-11-23  Mikhail Maltsev  <maltsevm@gmail.com>

	PR target/68497
	* config/i386/i386.c (output_387_binary_op): Fix assertion for
	-fno-checking case.

gcc/testsuite/ChangeLog:

2015-11-23  Mikhail Maltsev  <maltsevm@gmail.com>

	PR target/68497
	* gcc.target/i386/pr68497.c: New test.