Displaying 2 results from an estimated 2 matches for "vssa_sigma".
2017 Jul 06
2
Dataflow analysis regression in 3.7
On Thu, Jul 6, 2017 at 7:00 AM, Davide Italiano <davide at freebsd.org> wrote:
> On Wed, Jul 5, 2017 at 3:59 PM, Johan Engelen via llvm-dev
> <llvm-dev at lists.llvm.org> wrote:
> > Hi all,
> > I just found an optimization regression regarding simple
> > dataflow/constprop analysis:
> > https://godbolt.org/g/Uz8P7t
> >
> > This code
>
2017 Jul 07
3
Dataflow analysis regression in 3.7
...1
> ret i32 %.
> }
>
> but just before:
>
> define i32 @dataflow(i32 %b) local_unnamed_addr #0 {
> entry:
> %cmp = icmp eq i32 %b, 4
> br i1 %cmp, label %if.then, label %if.else
>
> if.then: ; preds = %entry
> %vSSA_sigma = phi i32 [ %b, %entry ]
> %mul = mul nsw i32 3, %vSSA_sigma
> br label %if.end
>
> if.else: ; preds = %entry
> br label %if.end
>
> if.end: ; preds = %if.else, %if.then
> %a.0 = p...