induct regression in gcc 4.3.1

[Jack Howarth]

   I see the same regression at -m64 in gcc 4.3.1 with the induct
polyhedron benchmark on i686-apple-darwin9...

gfortran 4.3.1          

-m64 -O3                                                           60.88
-m64 -ffast-math -O3                                               84.37
-m64 -fassociative-math -fno-signed-zeros -fno-trapping-math -O3   85.75

gfortran 4.2.4

-m64 -O3               65.97
-m64 -ffast-math -O3   61.55

          Jack