change testing of signed compares against SMIN or SMAX

These tests are written by testing if the comparisons are equal
to their expected value: 0 or 1. So, a compare of a compare
but such compares of compare have their own simplification
which defeats what's tested here.

So, rewrite the test to avoid such compares of compare.

Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
1 file changed