[PATCH] tree-optimization/106922 - missed FRE/PRE

[Richard Biener]

On Fri, 23 Sep 2022, Jakub Jelinek wrote:

> On Thu, Sep 22, 2022 at 01:10:08PM +0200, Richard Biener via Gcc-patches wrote:
> > 	* g++.dg/tree-ssa/pr106922.C: Adjust.
> 
> > --- a/gcc/testsuite/g++.dg/tree-ssa/pr106922.C
> > +++ b/gcc/testsuite/g++.dg/tree-ssa/pr106922.C
> > @@ -87,5 +87,4 @@ void testfunctionfoo() {
> >    }
> >  }
> >  
> > -// { dg-final { scan-tree-dump-times "Found fully redundant value" 4 "pre" { xfail { ! lp64 } } } }
> > -// { dg-final { scan-tree-dump-not "m_initialized" "cddce3" { xfail { ! lp64 } } } }
> > +// { dg-final { scan-tree-dump-not "m_initialized" "dce3" } }
> 
> I've noticed
> +UNRESOLVED: g++.dg/tree-ssa/pr106922.C  -std=gnu++20  scan-tree-dump-not dce3 "m_initialized"
> +UNRESOLVED: g++.dg/tree-ssa/pr106922.C  -std=gnu++2b  scan-tree-dump-not dce3 "m_initialized"
> with this change, both on x86_64 and i686.
> The dump is still cddce3, additionally as the last reference to the pre
> dump is gone, not sure it is worth creating that dump.

oops...

> With the following patch, there aren't FAILs nor UNRESOLVED tests with
> GXX_TESTSUITE_STDS=98,11,14,17,20,2b make check-g++ RUNTESTFLAGS="--target_board=unix\{-m32,-m64\} dg.exp='pr106922.C'"
> 
> Ok for trunk?

OK.

Thanks,
Richard.

> 2022-09-23  Jakub Jelinek  <jakub@redhat.com>
> 
> 	PR tree-optimization/106922
> 	* g++.dg/tree-ssa/pr106922.C: Scan in cddce3 dump rather than
> 	dce3.  Remove -fdump-tree-pre-details from dg-options.
> 
> --- gcc/testsuite/g++.dg/tree-ssa/pr106922.C.jj	2022-09-23 09:02:57.011311664 +0200
> +++ gcc/testsuite/g++.dg/tree-ssa/pr106922.C	2022-09-23 09:41:06.348797951 +0200
> @@ -1,5 +1,5 @@
>  // { dg-require-effective-target c++20 }
> -// { dg-options "-O2 -fdump-tree-pre-details -fdump-tree-cddce3" }
> +// { dg-options "-O2 -fdump-tree-cddce3" }
>  
>  template <typename> struct __new_allocator {
>    void deallocate(int *, int) { operator delete(0); }
> @@ -87,4 +87,4 @@ void testfunctionfoo() {
>    }
>  }
>  
> -// { dg-final { scan-tree-dump-not "m_initialized" "dce3" } }
> +// { dg-final { scan-tree-dump-not "m_initialized" "cddce3" } }
> 
> 
> 	Jakub
> 
> 

-- 
Richard Biener <rguenther@suse.de>
SUSE Software Solutions Germany GmbH, Frankenstrasse 146, 90461 Nuernberg,
Germany; GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman;
HRB 36809 (AG Nuernberg)