On Wed, 23 Aug 2023, Jan Hubicka wrote:
> > We seem to peel one iteration for no good reason. The loop is
> > a do-while loop already. The key is we see the first iteration
> > exit condition is known not taken and then:
> Hi,
> this is patch fixing wrong return value in should_duplicate_loop_he
> We seem to peel one iteration for no good reason. The loop is
> a do-while loop already. The key is we see the first iteration
> exit condition is known not taken and then:
Hi,
this is patch fixing wrong return value in should_duplicate_loop_header_p.
Doing so uncovered suboptimal decisions on
>
> We seem to peel one iteration for no good reason. The loop is
> a do-while loop already. The key is we see the first iteration
> exit condition is known not taken and then:
>
> Registering value_relation (path_oracle) (iter.24_6 > iter.24_5) (root:
> bb2)
> Stmt is static (constant in
On Tue, 22 Aug 2023, Hongtao Liu wrote:
> On Mon, Jul 17, 2023 at 5:18?PM Richard Biener via Gcc-patches
> wrote:
> >
> > On Fri, 14 Jul 2023, Jan Hubicka wrote:
> >
> > > Hi,
> > > loop-ch currently does analysis using ranger for all loops to identify
> > > candidates and then follows by phase w
On Mon, Jul 17, 2023 at 5:18 PM Richard Biener via Gcc-patches
wrote:
>
> On Fri, 14 Jul 2023, Jan Hubicka wrote:
>
> > Hi,
> > loop-ch currently does analysis using ranger for all loops to identify
> > candidates and then follows by phase where headers are duplicated (which
> > breaks SSA and ran
On Thu, Jul 20, 2023 at 9:10 AM Jan Hubicka via Gcc-patches
wrote:
>
> Hi,
> this patch makes tree-ssa-loop-ch to understand if-combined conditionals
> (which
> are quite common) and remove the IV-derived heuristics. That heuristics is
> quite dubious because every variable with PHI in header of
On Fri, 14 Jul 2023, Jan Hubicka wrote:
> Hi,
> loop-ch currently does analysis using ranger for all loops to identify
> candidates and then follows by phase where headers are duplicated (which
> breaks SSA and ranger). The second stage does more analysis (to see how
> many BBs we want to duplica
