------- Comment #27 from rguenther at suse dot de 2009-08-31 15:23 ------- Subject: Re: Time increase for the Polyhedron test air.f90 due to bad optimization
On Mon, 31 Aug 2009, jv244 at cam dot ac dot uk wrote: > ------- Comment #26 from jv244 at cam dot ac dot uk 2009-08-31 15:20 ------- > (In reply to comment #25) > > - if (npx[(integer(kind=8)) i + -1] + > > 1 > > > j) > > + if (NON_LVALUE_EXPR > > <npx[(integer(kind=8)) i + -1]> >= j)> where NON_LVALUE_EXPR appear when > > the test is compiled without > > -fno-strict-overflow. > > I wonder if this is a case where the optimizers would benefit from exploiting > the fact that in Fortran integers can never overflow in a valid program ? In fact it does with -fstrict-overflow. Richard. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40106
