induct regression in gcc 4.3.1

[Jack Howarth]

   It appears that the performance regression which
I found in the induct polyhedron benchmark in gcc 4.3.1 is
triggered by the use of -ffast-math. Benchmarking induct
compiled with gcc 4.2.4 and 4.3.1 shows....

                   gcc 4.2.4       gcc 4.3.1
                    Ave Run         Ave Run 
-O3                  73.57           71.71
-ffast-math -O3      68.27           89.76

This is on i686-apple-darwin9.
                     Jack