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Re: [PATCH] Improve x % y to x VRP optimization (PR tree-optimization/79408)
On Mon, Feb 13, 2017 at 12:24:08PM +0100, Richard Biener wrote:
> You'd of course allocate it on the stack. But yeah, sth like your patch
> works for me.
Now bootstrapped/regtested successfully on x86_64-linux and i686-linux.
So is this ok for trunk and perhaps we can add new APIs later?
> > 2017-02-13 Jakub Jelinek <jakub@redhat.com>
> >
> > PR tree-optimization/79408
> > * tree-vrp.c (simplify_div_or_mod_using_ranges): Handle also the
> > case when on TRUNC_MOD_EXPR op0 is INTEGER_CST.
> > (simplify_stmt_using_ranges): Call simplify_div_or_mod_using_ranges
> > also if rhs1 is INTEGER_CST.
> >
> > * gcc.dg/tree-ssa/pr79408-2.c: New test.
Jakub