On Fri, 5 Aug 2022, Tamar Christina wrote:

> Hi All,
> 
> This excludes value_replacement and store_elim from diamonds as they don't
> handle the form properly.
> 
> Bootstrapped Regtested on aarch64-none-linux-gnu, x86_64-pc-linux-gnu
> and no issues.
> 
> Ok for master?
OK

> Thanks,
> Tamar
> 
> gcc/ChangeLog:
> 
>       PR middle-end/106534
>       * tree-ssa-phiopt.cc (tree_ssa_phiopt_worker): Guard the
>       value_replacement and store_elim from diamonds.
> 
> --- inline copy of patch -- 
> diff --git a/gcc/tree-ssa-phiopt.cc b/gcc/tree-ssa-phiopt.cc
> index 
> bdbf52916b0f88ee4f475e1fa306046d61f13d53..1e002c608591836ffb001724b3f469a8d042ae5e
>  100644
> --- a/gcc/tree-ssa-phiopt.cc
> +++ b/gcc/tree-ssa-phiopt.cc
> @@ -283,7 +283,7 @@ tree_ssa_phiopt_worker (bool do_store_elim, bool 
> do_hoist_loads, bool early_p)
>         || (e1->flags & EDGE_FALLTHRU) == 0)
>          continue;
>  
> -      if (do_store_elim)
> +      if (do_store_elim && !diamond_p)
>       {
>         /* Also make sure that bb1 only have one predecessor and that it
>            is bb.  */
> @@ -310,7 +310,7 @@ tree_ssa_phiopt_worker (bool do_store_elim, bool 
> do_hoist_loads, bool early_p)
>  
>         /* Value replacement can work with more than one PHI
>            so try that first. */
> -       if (!early_p)
> +       if (!early_p && !diamond_p)
>           for (gsi = gsi_start (phis); !gsi_end_p (gsi); gsi_next (&gsi))
>             {
>               phi = as_a <gphi *> (gsi_stmt (gsi));
> 
> 
> 
> 
> 

-- 
Richard Biener <rguent...@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)

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